---
_id: '11898'
abstract:
- lang: eng
text: "We build upon the recent papers by Weinstein and Yu (FOCS'16), Larsen (FOCS'12),
and Clifford et al. (FOCS'15) to present a general framework that gives amortized
lower bounds on the update and query times of dynamic data structures. Using our
framework, we present two concrete results.\r\n(1) For the dynamic polynomial
evaluation problem, where the polynomial is defined over a finite field of size
n1+Ω(1) and has degree n, any dynamic data structure must either have an amortized
update time of Ω((lgn/lglgn)2) or an amortized query time of Ω((lgn/lglgn)2).\r\n(2)
For the dynamic online matrix vector multiplication problem, where we get an n×n
matrix whose entires are drawn from a finite field of size nΘ(1), any dynamic
data structure must either have an amortized update time of Ω((lgn/lglgn)2) or
an amortized query time of Ω(n⋅(lgn/lglgn)2).\r\nFor these two problems, the previous
works by Larsen (FOCS'12) and Clifford et al. (FOCS'15) gave the same lower bounds,
but only for worst case update and query times. Our bounds match the highest unconditional
lower bounds known till date for any dynamic problem in the cell-probe model."
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Sayan
full_name: Bhattacharya, Sayan
last_name: Bhattacharya
- first_name: Monika H
full_name: Henzinger, Monika H
id: 540c9bbd-f2de-11ec-812d-d04a5be85630
last_name: Henzinger
orcid: 0000-0002-5008-6530
- first_name: Stefan
full_name: Neumann, Stefan
last_name: Neumann
citation:
ama: Bhattacharya S, Henzinger M, Neumann S. New amortized cell-probe lower bounds
for dynamic problems. Theoretical Computer Science. 2019;779:72-87. doi:10.1016/j.tcs.2019.01.043
apa: Bhattacharya, S., Henzinger, M., & Neumann, S. (2019). New amortized cell-probe
lower bounds for dynamic problems. Theoretical Computer Science. Elsevier.
https://doi.org/10.1016/j.tcs.2019.01.043
chicago: Bhattacharya, Sayan, Monika Henzinger, and Stefan Neumann. “New Amortized
Cell-Probe Lower Bounds for Dynamic Problems.” Theoretical Computer Science.
Elsevier, 2019. https://doi.org/10.1016/j.tcs.2019.01.043.
ieee: S. Bhattacharya, M. Henzinger, and S. Neumann, “New amortized cell-probe lower
bounds for dynamic problems,” Theoretical Computer Science, vol. 779. Elsevier,
pp. 72–87, 2019.
ista: Bhattacharya S, Henzinger M, Neumann S. 2019. New amortized cell-probe lower
bounds for dynamic problems. Theoretical Computer Science. 779, 72–87.
mla: Bhattacharya, Sayan, et al. “New Amortized Cell-Probe Lower Bounds for Dynamic
Problems.” Theoretical Computer Science, vol. 779, Elsevier, 2019, pp.
72–87, doi:10.1016/j.tcs.2019.01.043.
short: S. Bhattacharya, M. Henzinger, S. Neumann, Theoretical Computer Science 779
(2019) 72–87.
date_created: 2022-08-17T09:02:15Z
date_published: 2019-08-02T00:00:00Z
date_updated: 2024-11-06T12:23:49Z
day: '02'
doi: 10.1016/j.tcs.2019.01.043
extern: '1'
external_id:
arxiv:
- '1902.02304'
intvolume: ' 779'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1902.02304
month: '08'
oa: 1
oa_version: Preprint
page: 72-87
publication: Theoretical Computer Science
publication_identifier:
issn:
- 0304-3975
publication_status: published
publisher: Elsevier
quality_controlled: '1'
scopus_import: '1'
status: public
title: New amortized cell-probe lower bounds for dynamic problems
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 779
year: '2019'
...
---
_id: '11957'
abstract:
- lang: eng
text: Cross-coupling reactions mediated by dual nickel/photocatalysis are synthetically
attractive but rely mainly on expensive, non-recyclable noble-metal complexes
as photocatalysts. Heterogeneous semiconductors, which are commonly used for artificial
photosynthesis and wastewater treatment, are a sustainable alternative. Graphitic
carbon nitrides, a class of metal-free polymers that can be easily prepared from
bulk chemicals, are heterogeneous semiconductors with high potential for photocatalytic
organic transformations. Here, we demonstrate that graphitic carbon nitrides in
combination with nickel catalysis can induce selective C−O cross-couplings of
carboxylic acids with aryl halides, yielding the respective aryl esters in excellent
yield and selectivity. The heterogeneous organic photocatalyst exhibits a broad
substrate scope, is able to harvest green light, and can be recycled multiple
times. In situ FTIR was used to track the reaction progress to study this transformation
at different irradiation wavelengths and reaction scales.
article_processing_charge: No
article_type: letter_note
author:
- first_name: Bartholomäus
full_name: Pieber, Bartholomäus
id: 93e5e5b2-0da6-11ed-8a41-af589a024726
last_name: Pieber
orcid: 0000-0001-8689-388X
- first_name: Jamal A.
full_name: Malik, Jamal A.
last_name: Malik
- first_name: Cristian
full_name: Cavedon, Cristian
last_name: Cavedon
- first_name: Sebastian
full_name: Gisbertz, Sebastian
last_name: Gisbertz
- first_name: Aleksandr
full_name: Savateev, Aleksandr
last_name: Savateev
- first_name: Daniel
full_name: Cruz, Daniel
last_name: Cruz
- first_name: Tobias
full_name: Heil, Tobias
last_name: Heil
- first_name: Guigang
full_name: Zhang, Guigang
last_name: Zhang
- first_name: Peter H.
full_name: Seeberger, Peter H.
last_name: Seeberger
citation:
ama: 'Pieber B, Malik JA, Cavedon C, et al. Semi‐heterogeneous dual nickel/photocatalysis
using carbon nitrides: Esterification of carboxylic acids with aryl halides. Angewandte
Chemie International Edition. 2019;58(28):9575-9580. doi:10.1002/anie.201902785'
apa: 'Pieber, B., Malik, J. A., Cavedon, C., Gisbertz, S., Savateev, A., Cruz, D.,
… Seeberger, P. H. (2019). Semi‐heterogeneous dual nickel/photocatalysis using
carbon nitrides: Esterification of carboxylic acids with aryl halides. Angewandte
Chemie International Edition. Wiley. https://doi.org/10.1002/anie.201902785'
chicago: 'Pieber, Bartholomäus, Jamal A. Malik, Cristian Cavedon, Sebastian Gisbertz,
Aleksandr Savateev, Daniel Cruz, Tobias Heil, Guigang Zhang, and Peter H. Seeberger.
“Semi‐heterogeneous Dual Nickel/Photocatalysis Using Carbon Nitrides: Esterification
of Carboxylic Acids with Aryl Halides.” Angewandte Chemie International Edition.
Wiley, 2019. https://doi.org/10.1002/anie.201902785.'
ieee: 'B. Pieber et al., “Semi‐heterogeneous dual nickel/photocatalysis using
carbon nitrides: Esterification of carboxylic acids with aryl halides,” Angewandte
Chemie International Edition, vol. 58, no. 28. Wiley, pp. 9575–9580, 2019.'
ista: 'Pieber B, Malik JA, Cavedon C, Gisbertz S, Savateev A, Cruz D, Heil T, Zhang
G, Seeberger PH. 2019. Semi‐heterogeneous dual nickel/photocatalysis using carbon
nitrides: Esterification of carboxylic acids with aryl halides. Angewandte Chemie
International Edition. 58(28), 9575–9580.'
mla: 'Pieber, Bartholomäus, et al. “Semi‐heterogeneous Dual Nickel/Photocatalysis
Using Carbon Nitrides: Esterification of Carboxylic Acids with Aryl Halides.”
Angewandte Chemie International Edition, vol. 58, no. 28, Wiley, 2019,
pp. 9575–80, doi:10.1002/anie.201902785.'
short: B. Pieber, J.A. Malik, C. Cavedon, S. Gisbertz, A. Savateev, D. Cruz, T.
Heil, G. Zhang, P.H. Seeberger, Angewandte Chemie International Edition 58 (2019)
9575–9580.
date_created: 2022-08-24T10:50:19Z
date_published: 2019-07-08T00:00:00Z
date_updated: 2024-10-14T11:43:18Z
day: '08'
doi: 10.1002/anie.201902785
extern: '1'
external_id:
pmid:
- '31050132'
intvolume: ' 58'
issue: '28'
language:
- iso: eng
month: '07'
oa_version: None
page: 9575-9580
pmid: 1
publication: Angewandte Chemie International Edition
publication_identifier:
eissn:
- 1521-3773
issn:
- 1433-7851
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Semi‐heterogeneous dual nickel/photocatalysis using carbon nitrides: Esterification
of carboxylic acids with aryl halides'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 58
year: '2019'
...
---
_id: '11982'
abstract:
- lang: eng
text: A carbon nitride material can be combined with homogeneous nickel catalysts
for light-mediated cross-couplings of aryl bromides with alcohols under mild conditions.
The metal-free heterogeneous semiconductor is fully recyclable and couples a broad
range of electron-poor aryl bromides with primary and secondary alcohols as well
as water. The application for intramolecular reactions and the synthesis of active
pharmaceutical ingredients was demonstrated. The catalytic protocol is applicable
for the coupling of aryl iodides with thiols as well.
article_processing_charge: No
article_type: letter_note
author:
- first_name: Cristian
full_name: Cavedon, Cristian
last_name: Cavedon
- first_name: Amiera
full_name: Madani, Amiera
last_name: Madani
- first_name: Peter H.
full_name: Seeberger, Peter H.
last_name: Seeberger
- first_name: Bartholomäus
full_name: Pieber, Bartholomäus
id: 93e5e5b2-0da6-11ed-8a41-af589a024726
last_name: Pieber
orcid: 0000-0001-8689-388X
citation:
ama: Cavedon C, Madani A, Seeberger PH, Pieber B. Semiheterogeneous dual nickel/photocatalytic
(thio)etherification using carbon nitrides. Organic Letters. 2019;21(13):5331-5334.
doi:10.1021/acs.orglett.9b01957
apa: Cavedon, C., Madani, A., Seeberger, P. H., & Pieber, B. (2019). Semiheterogeneous
dual nickel/photocatalytic (thio)etherification using carbon nitrides. Organic
Letters. American Chemical Society. https://doi.org/10.1021/acs.orglett.9b01957
chicago: Cavedon, Cristian, Amiera Madani, Peter H. Seeberger, and Bartholomäus
Pieber. “Semiheterogeneous Dual Nickel/Photocatalytic (Thio)Etherification Using
Carbon Nitrides.” Organic Letters. American Chemical Society, 2019. https://doi.org/10.1021/acs.orglett.9b01957.
ieee: C. Cavedon, A. Madani, P. H. Seeberger, and B. Pieber, “Semiheterogeneous
dual nickel/photocatalytic (thio)etherification using carbon nitrides,” Organic
Letters, vol. 21, no. 13. American Chemical Society, pp. 5331–5334, 2019.
ista: Cavedon C, Madani A, Seeberger PH, Pieber B. 2019. Semiheterogeneous dual
nickel/photocatalytic (thio)etherification using carbon nitrides. Organic Letters.
21(13), 5331–5334.
mla: Cavedon, Cristian, et al. “Semiheterogeneous Dual Nickel/Photocatalytic (Thio)Etherification
Using Carbon Nitrides.” Organic Letters, vol. 21, no. 13, American Chemical
Society, 2019, pp. 5331–34, doi:10.1021/acs.orglett.9b01957.
short: C. Cavedon, A. Madani, P.H. Seeberger, B. Pieber, Organic Letters 21 (2019)
5331–5334.
date_created: 2022-08-25T11:18:00Z
date_published: 2019-07-05T00:00:00Z
date_updated: 2024-10-14T12:07:10Z
day: '05'
doi: 10.1021/acs.orglett.9b01957
extern: '1'
external_id:
pmid:
- '31247752'
intvolume: ' 21'
issue: '13'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1021/acs.orglett.9b01957
month: '07'
oa: 1
oa_version: Published Version
page: 5331-5334
pmid: 1
publication: Organic Letters
publication_identifier:
eissn:
- 1523-7052
issn:
- 1523-7060
publication_status: published
publisher: American Chemical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Semiheterogeneous dual nickel/photocatalytic (thio)etherification using carbon
nitrides
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 21
year: '2019'
...
---
_id: '11984'
abstract:
- lang: eng
text: Differentially protected galactosamine building blocks are key components
for the synthesis of human and bacterial oligosaccharides. The azidophenylselenylation
of 3,4,6-tri-O-acetyl-d-galactal provides straightforward access to the corresponding
2-nitrogenated glycoside. Poor reproducibility and the use of azides that lead
to the formation of potentially explosive and toxic species limit the scalability
of this reaction and render it a bottleneck for carbohydrate synthesis. Here,
we present a method for the safe, efficient, and reliable azidophenylselenylation
of 3,4,6-tri-O-acetyl-d-galactal at room temperature, using continuous flow chemistry.
Careful analysis of the transformation resulted in reaction conditions that produce
minimal side products while the reaction time was reduced drastically when compared
to batch reactions. The flow setup is readily scalable to process 5 mmol of galactal
in 3 h, producing 1.2 mmol/h of product.
article_processing_charge: No
article_type: letter_note
author:
- first_name: Mónica
full_name: Guberman, Mónica
last_name: Guberman
- first_name: Bartholomäus
full_name: Pieber, Bartholomäus
id: 93e5e5b2-0da6-11ed-8a41-af589a024726
last_name: Pieber
orcid: 0000-0001-8689-388X
- first_name: Peter H.
full_name: Seeberger, Peter H.
last_name: Seeberger
citation:
ama: Guberman M, Pieber B, Seeberger PH. Safe and scalable continuous flow azidophenylselenylation
of galactal to prepare galactosamine building blocks. Organic Process Research
and Development. 2019;23(12):2764-2770. doi:10.1021/acs.oprd.9b00456
apa: Guberman, M., Pieber, B., & Seeberger, P. H. (2019). Safe and scalable
continuous flow azidophenylselenylation of galactal to prepare galactosamine building
blocks. Organic Process Research and Development. American Chemical Society.
https://doi.org/10.1021/acs.oprd.9b00456
chicago: Guberman, Mónica, Bartholomäus Pieber, and Peter H. Seeberger. “Safe and
Scalable Continuous Flow Azidophenylselenylation of Galactal to Prepare Galactosamine
Building Blocks.” Organic Process Research and Development. American Chemical
Society, 2019. https://doi.org/10.1021/acs.oprd.9b00456.
ieee: M. Guberman, B. Pieber, and P. H. Seeberger, “Safe and scalable continuous
flow azidophenylselenylation of galactal to prepare galactosamine building blocks,”
Organic Process Research and Development, vol. 23, no. 12. American Chemical
Society, pp. 2764–2770, 2019.
ista: Guberman M, Pieber B, Seeberger PH. 2019. Safe and scalable continuous flow
azidophenylselenylation of galactal to prepare galactosamine building blocks.
Organic Process Research and Development. 23(12), 2764–2770.
mla: Guberman, Mónica, et al. “Safe and Scalable Continuous Flow Azidophenylselenylation
of Galactal to Prepare Galactosamine Building Blocks.” Organic Process Research
and Development, vol. 23, no. 12, American Chemical Society, 2019, pp. 2764–70,
doi:10.1021/acs.oprd.9b00456.
short: M. Guberman, B. Pieber, P.H. Seeberger, Organic Process Research and Development
23 (2019) 2764–2770.
date_created: 2022-08-25T11:30:33Z
date_published: 2019-12-20T00:00:00Z
date_updated: 2023-02-21T10:10:23Z
day: '20'
doi: 10.1021/acs.oprd.9b00456
extern: '1'
intvolume: ' 23'
issue: '12'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1021/acs.oprd.9b00456
month: '12'
oa: 1
oa_version: Published Version
page: 2764-2770
publication: Organic Process Research and Development
publication_identifier:
eissn:
- 1520-586X
issn:
- 1083-6160
publication_status: published
publisher: American Chemical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Safe and scalable continuous flow azidophenylselenylation of galactal to prepare
galactosamine building blocks
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 23
year: '2019'
...
---
_id: '12190'
abstract:
- lang: eng
text: Meiotic crossover frequency varies within genomes, which influences genetic
diversity and adaptation. In turn, genetic variation within populations can act
to modify crossover frequency in cis and trans. To identify genetic variation
that controls meiotic crossover frequency, we screened Arabidopsis accessions
using fluorescent recombination reporters. We mapped a genetic modifier of crossover
frequency in Col × Bur populations of Arabidopsis to a premature stop codon within
TBP-ASSOCIATED FACTOR 4b (TAF4b), which encodes a subunit of the RNA polymerase
II general transcription factor TFIID. The Arabidopsis taf4b mutation is a rare
variant found in the British Isles, originating in South-West Ireland. Using genetics,
genomics, and immunocytology, we demonstrate a genome-wide decrease in taf4b crossovers,
with strongest reduction in the sub-telomeric regions. Using RNA sequencing (RNA-seq)
from purified meiocytes, we show that TAF4b expression is meiocyte enriched, whereas
its paralog TAF4 is broadly expressed. Consistent with the role of TFIID in promoting
gene expression, RNA-seq of wild-type and taf4b meiocytes identified widespread
transcriptional changes, including in genes that regulate the meiotic cell cycle
and recombination. Therefore, TAF4b duplication is associated with acquisition
of meiocyte-specific expression and promotion of germline transcription, which
act directly or indirectly to elevate crossovers. This identifies a novel mode
of meiotic recombination control via a general transcription factor.
acknowledgement: "We thank Gregory Copenhaver (University of North Carolina), Avraham
Levy (The Weizmann Institute), and Scott Poethig (University of Pennsylvania) for
FTLs; Piotr Ziolkowski for Col-420/Bur seed; Sureshkumar Balasubramanian\r\n(Monash
University) for providing British and Irish Arabidopsis accessions; Mathilde Grelon
(INRA, Versailles) for providing the MLH1 antibody; and the Gurdon Institute for
access to microscopes. This work was supported by a BBSRC DTP studentship (E.J.L.),
European Research Area Network for Coordinating Action in Plant Sciences/BBSRC ‘‘DeCOP’’
(BB/M004937/1; C.L.), a BBSRC David Phillips Fellowship (BB/L025043/1; H.G. and
X.F.), the European Research Council (CoG ‘‘SynthHotspot,’’ A.J.T., C.L., and I.R.H.;
StG ‘‘SexMeth,’’ X.F.), and a Sainsbury Charitable Foundation Studentship (A.R.B.)."
article_processing_charge: No
article_type: original
author:
- first_name: Emma J.
full_name: Lawrence, Emma J.
last_name: Lawrence
- first_name: Hongbo
full_name: Gao, Hongbo
last_name: Gao
- first_name: Andrew J.
full_name: Tock, Andrew J.
last_name: Tock
- first_name: Christophe
full_name: Lambing, Christophe
last_name: Lambing
- first_name: Alexander R.
full_name: Blackwell, Alexander R.
last_name: Blackwell
- first_name: Xiaoqi
full_name: Feng, Xiaoqi
id: e0164712-22ee-11ed-b12a-d80fcdf35958
last_name: Feng
orcid: 0000-0002-4008-1234
- first_name: Ian R.
full_name: Henderson, Ian R.
last_name: Henderson
citation:
ama: Lawrence EJ, Gao H, Tock AJ, et al. Natural variation in TBP-ASSOCIATED FACTOR
4b controls meiotic crossover and germline transcription in Arabidopsis. Current
Biology. 2019;29(16):2676-2686.e3. doi:10.1016/j.cub.2019.06.084
apa: Lawrence, E. J., Gao, H., Tock, A. J., Lambing, C., Blackwell, A. R., Feng,
X., & Henderson, I. R. (2019). Natural variation in TBP-ASSOCIATED FACTOR
4b controls meiotic crossover and germline transcription in Arabidopsis. Current
Biology. Elsevier. https://doi.org/10.1016/j.cub.2019.06.084
chicago: Lawrence, Emma J., Hongbo Gao, Andrew J. Tock, Christophe Lambing, Alexander
R. Blackwell, Xiaoqi Feng, and Ian R. Henderson. “Natural Variation in TBP-ASSOCIATED
FACTOR 4b Controls Meiotic Crossover and Germline Transcription in Arabidopsis.”
Current Biology. Elsevier, 2019. https://doi.org/10.1016/j.cub.2019.06.084.
ieee: E. J. Lawrence et al., “Natural variation in TBP-ASSOCIATED FACTOR
4b controls meiotic crossover and germline transcription in Arabidopsis,” Current
Biology, vol. 29, no. 16. Elsevier, p. 2676–2686.e3, 2019.
ista: Lawrence EJ, Gao H, Tock AJ, Lambing C, Blackwell AR, Feng X, Henderson IR.
2019. Natural variation in TBP-ASSOCIATED FACTOR 4b controls meiotic crossover
and germline transcription in Arabidopsis. Current Biology. 29(16), 2676–2686.e3.
mla: Lawrence, Emma J., et al. “Natural Variation in TBP-ASSOCIATED FACTOR 4b Controls
Meiotic Crossover and Germline Transcription in Arabidopsis.” Current Biology,
vol. 29, no. 16, Elsevier, 2019, p. 2676–2686.e3, doi:10.1016/j.cub.2019.06.084.
short: E.J. Lawrence, H. Gao, A.J. Tock, C. Lambing, A.R. Blackwell, X. Feng, I.R.
Henderson, Current Biology 29 (2019) 2676–2686.e3.
date_created: 2023-01-16T09:16:33Z
date_published: 2019-08-19T00:00:00Z
date_updated: 2025-01-14T14:31:02Z
day: '19'
department:
- _id: XiFe
doi: 10.1016/j.cub.2019.06.084
extern: '1'
external_id:
pmid:
- '31378616'
intvolume: ' 29'
issue: '16'
keyword:
- General Agricultural and Biological Sciences
- General Biochemistry
- Genetics and Molecular Biology
language:
- iso: eng
month: '08'
oa_version: None
page: 2676-2686.e3
pmid: 1
publication: Current Biology
publication_identifier:
issn:
- 0960-9822
publication_status: published
publisher: Elsevier
quality_controlled: '1'
scopus_import: '1'
status: public
title: Natural variation in TBP-ASSOCIATED FACTOR 4b controls meiotic crossover and
germline transcription in Arabidopsis
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 29
year: '2019'
...
---
_id: '12192'
abstract:
- lang: eng
text: Transposable elements (TEs), the movement of which can damage the genome,
are epigenetically silenced in eukaryotes. Intriguingly, TEs are activated in
the sperm companion cell – vegetative cell (VC) – of the flowering plant Arabidopsis
thaliana. However, the extent and mechanism of this activation are unknown. Here
we show that about 100 heterochromatic TEs are activated in VCs, mostly by DEMETER-catalyzed
DNA demethylation. We further demonstrate that DEMETER access to some of these
TEs is permitted by the natural depletion of linker histone H1 in VCs. Ectopically
expressed H1 suppresses TEs in VCs by reducing DNA demethylation and via a methylation-independent
mechanism. We demonstrate that H1 is required for heterochromatin condensation
in plant cells and show that H1 overexpression creates heterochromatic foci in
the VC progenitor cell. Taken together, our results demonstrate that the natural
depletion of H1 during male gametogenesis facilitates DEMETER-directed DNA demethylation,
heterochromatin relaxation, and TE activation.
acknowledgement: We thank David Twell for the pDONR-P4-P1R-pLAT52 and pDONR-P2R-P3-mRFP
vectors, the John Innes Centre Bioimaging Facility (Elaine Barclay and Grant Calder)
for their assistance with microscopy, and the Norwich BioScience Institute Partnership
Computing infrastructure for Science Group for High Performance Computing resources.
This work was funded by a Biotechnology and Biological Sciences Research Council
(BBSRC) David Phillips Fellowship (BB/L025043/1; SH, JZ and XF), a European Research
Council Starting Grant ('SexMeth' 804981; XF) and a Grant to Exceptional Researchers
by the Gatsby Charitable Foundation (SH and XF).
article_number: '42530'
article_processing_charge: No
article_type: original
author:
- first_name: Shengbo
full_name: He, Shengbo
last_name: He
- first_name: Martin
full_name: Vickers, Martin
last_name: Vickers
- first_name: Jingyi
full_name: Zhang, Jingyi
last_name: Zhang
- first_name: Xiaoqi
full_name: Feng, Xiaoqi
id: e0164712-22ee-11ed-b12a-d80fcdf35958
last_name: Feng
orcid: 0000-0002-4008-1234
citation:
ama: He S, Vickers M, Zhang J, Feng X. Natural depletion of histone H1 in sex cells
causes DNA demethylation, heterochromatin decondensation and transposon activation.
eLife. 2019;8. doi:10.7554/elife.42530
apa: He, S., Vickers, M., Zhang, J., & Feng, X. (2019). Natural depletion of
histone H1 in sex cells causes DNA demethylation, heterochromatin decondensation
and transposon activation. ELife. eLife Sciences Publications. https://doi.org/10.7554/elife.42530
chicago: He, Shengbo, Martin Vickers, Jingyi Zhang, and Xiaoqi Feng. “Natural Depletion
of Histone H1 in Sex Cells Causes DNA Demethylation, Heterochromatin Decondensation
and Transposon Activation.” ELife. eLife Sciences Publications, 2019. https://doi.org/10.7554/elife.42530.
ieee: S. He, M. Vickers, J. Zhang, and X. Feng, “Natural depletion of histone H1
in sex cells causes DNA demethylation, heterochromatin decondensation and transposon
activation,” eLife, vol. 8. eLife Sciences Publications, 2019.
ista: He S, Vickers M, Zhang J, Feng X. 2019. Natural depletion of histone H1 in
sex cells causes DNA demethylation, heterochromatin decondensation and transposon
activation. eLife. 8, 42530.
mla: He, Shengbo, et al. “Natural Depletion of Histone H1 in Sex Cells Causes DNA
Demethylation, Heterochromatin Decondensation and Transposon Activation.” ELife,
vol. 8, 42530, eLife Sciences Publications, 2019, doi:10.7554/elife.42530.
short: S. He, M. Vickers, J. Zhang, X. Feng, ELife 8 (2019).
date_created: 2023-01-16T09:17:21Z
date_published: 2019-05-28T00:00:00Z
date_updated: 2025-01-14T14:31:41Z
day: '28'
ddc:
- '580'
department:
- _id: XiFe
doi: 10.7554/elife.42530
extern: '1'
external_id:
unknown:
- '31135340'
file:
- access_level: open_access
checksum: ea6b89c20d59e5eb3646916fe5d568ad
content_type: application/pdf
creator: alisjak
date_created: 2023-02-07T09:42:46Z
date_updated: 2023-02-07T09:42:46Z
file_id: '12525'
file_name: 2019_elife_He.pdf
file_size: 2493837
relation: main_file
success: 1
file_date_updated: 2023-02-07T09:42:46Z
has_accepted_license: '1'
intvolume: ' 8'
keyword:
- General Immunology and Microbiology
- General Biochemistry
- Genetics and Molecular Biology
- General Medicine
- General Neuroscience
language:
- iso: eng
license: https://creativecommons.org/licenses/by/4.0/
month: '05'
oa: 1
oa_version: Published Version
publication: eLife
publication_identifier:
issn:
- 2050-084X
publication_status: published
publisher: eLife Sciences Publications
quality_controlled: '1'
scopus_import: '1'
status: public
title: Natural depletion of histone H1 in sex cells causes DNA demethylation, heterochromatin
decondensation and transposon activation
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 8
year: '2019'
...
---
_id: '27'
abstract:
- lang: eng
text: The cerebral cortex is composed of a large variety of distinct cell-types
including projection neurons, interneurons and glial cells which emerge from distinct
neural stem cell (NSC) lineages. The vast majority of cortical projection neurons
and certain classes of glial cells are generated by radial glial progenitor cells
(RGPs) in a highly orchestrated manner. Recent studies employing single cell analysis
and clonal lineage tracing suggest that NSC and RGP lineage progression are regulated
in a profound deterministic manner. In this review we focus on recent advances
based mainly on correlative phenotypic data emerging from functional genetic studies
in mice. We establish hypotheses to test in future research and outline a conceptual
framework how epigenetic cues modulate the generation of cell-type diversity during
cortical development. This article is protected by copyright. All rights reserved.
acknowledgement: " This work was supported by IST Austria institutional funds; NÖ
Forschung und Bildung \r\nn[f+b] (C13-002) to SH; a program grant from
\ the Human Frontiers Science Program (RGP0053/2014) to SH; the People
\ Programme (Marie Curie Actions) of the European Union’s Seventh Framework
Programme (FP7/2007-2013) under REA grant agreement No 618444 to SH, and the European
\ Research Council (ERC) under the European Union’s Horizon 2020 research
\ and innovation programme (grant agreement No 725780 LinPro)to SH.\r\n"
article_processing_charge: Yes (via OA deal)
article_type: review
author:
- first_name: Nicole
full_name: Amberg, Nicole
id: 4CD6AAC6-F248-11E8-B48F-1D18A9856A87
last_name: Amberg
orcid: 0000-0002-3183-8207
- first_name: Susanne
full_name: Laukoter, Susanne
id: 2D6B7A9A-F248-11E8-B48F-1D18A9856A87
last_name: Laukoter
orcid: 0000-0002-7903-3010
- first_name: Simon
full_name: Hippenmeyer, Simon
id: 37B36620-F248-11E8-B48F-1D18A9856A87
last_name: Hippenmeyer
orcid: 0000-0003-2279-1061
citation:
ama: Amberg N, Laukoter S, Hippenmeyer S. Epigenetic cues modulating the generation
of cell type diversity in the cerebral cortex. Journal of Neurochemistry.
2019;149(1):12-26. doi:10.1111/jnc.14601
apa: Amberg, N., Laukoter, S., & Hippenmeyer, S. (2019). Epigenetic cues modulating
the generation of cell type diversity in the cerebral cortex. Journal of Neurochemistry.
Wiley. https://doi.org/10.1111/jnc.14601
chicago: Amberg, Nicole, Susanne Laukoter, and Simon Hippenmeyer. “Epigenetic Cues
Modulating the Generation of Cell Type Diversity in the Cerebral Cortex.” Journal
of Neurochemistry. Wiley, 2019. https://doi.org/10.1111/jnc.14601.
ieee: N. Amberg, S. Laukoter, and S. Hippenmeyer, “Epigenetic cues modulating the
generation of cell type diversity in the cerebral cortex,” Journal of Neurochemistry,
vol. 149, no. 1. Wiley, pp. 12–26, 2019.
ista: Amberg N, Laukoter S, Hippenmeyer S. 2019. Epigenetic cues modulating the
generation of cell type diversity in the cerebral cortex. Journal of Neurochemistry.
149(1), 12–26.
mla: Amberg, Nicole, et al. “Epigenetic Cues Modulating the Generation of Cell Type
Diversity in the Cerebral Cortex.” Journal of Neurochemistry, vol. 149,
no. 1, Wiley, 2019, pp. 12–26, doi:10.1111/jnc.14601.
short: N. Amberg, S. Laukoter, S. Hippenmeyer, Journal of Neurochemistry 149 (2019)
12–26.
corr_author: '1'
date_created: 2018-12-11T11:44:14Z
date_published: 2019-04-01T00:00:00Z
date_updated: 2025-04-14T07:43:05Z
day: '01'
ddc:
- '570'
department:
- _id: SiHi
doi: 10.1111/jnc.14601
ec_funded: 1
external_id:
isi:
- '000462680200002'
file:
- access_level: open_access
checksum: db027721a95d36f5de36aadcd0bdf7e6
content_type: application/pdf
creator: kschuh
date_created: 2020-01-07T13:35:52Z
date_updated: 2020-07-14T12:45:45Z
file_id: '7239'
file_name: 2019_Wiley_Amberg.pdf
file_size: 889709
relation: main_file
file_date_updated: 2020-07-14T12:45:45Z
has_accepted_license: '1'
intvolume: ' 149'
isi: 1
issue: '1'
language:
- iso: eng
month: '04'
oa: 1
oa_version: Published Version
page: 12-26
project:
- _id: 25D92700-B435-11E9-9278-68D0E5697425
grant_number: LS13-002
name: Mapping Cell-Type Specificity of the Genomic Imprintome in the Brain
- _id: 25D7962E-B435-11E9-9278-68D0E5697425
grant_number: RGP0053/2014
name: Quantitative Structure-Function Analysis of Cerebral Cortex Assembly at Clonal
Level
- _id: 25D61E48-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '618444'
name: Molecular Mechanisms of Cerebral Cortex Development
- _id: 260018B0-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '725780'
name: Principles of Neural Stem Cell Lineage Progression in Cerebral Cortex Development
publication: Journal of Neurochemistry
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: Epigenetic cues modulating the generation of cell type diversity in the cerebral
cortex
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 149
year: '2019'
...
---
_id: '301'
abstract:
- lang: eng
text: A representation formula for solutions of stochastic partial differential
equations with Dirichlet boundary conditions is proved. The scope of our setting
is wide enough to cover the general situation when the backward characteristics
that appear in the usual formulation are not even defined in the Itô sense.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Mate
full_name: Gerencser, Mate
id: 44ECEDF2-F248-11E8-B48F-1D18A9856A87
last_name: Gerencser
- first_name: István
full_name: Gyöngy, István
last_name: Gyöngy
citation:
ama: Gerencser M, Gyöngy I. A Feynman–Kac formula for stochastic Dirichlet problems.
Stochastic Processes and their Applications. 2019;129(3):995-1012. doi:10.1016/j.spa.2018.04.003
apa: Gerencser, M., & Gyöngy, I. (2019). A Feynman–Kac formula for stochastic
Dirichlet problems. Stochastic Processes and Their Applications. Elsevier.
https://doi.org/10.1016/j.spa.2018.04.003
chicago: Gerencser, Mate, and István Gyöngy. “A Feynman–Kac Formula for Stochastic
Dirichlet Problems.” Stochastic Processes and Their Applications. Elsevier,
2019. https://doi.org/10.1016/j.spa.2018.04.003.
ieee: M. Gerencser and I. Gyöngy, “A Feynman–Kac formula for stochastic Dirichlet
problems,” Stochastic Processes and their Applications, vol. 129, no. 3.
Elsevier, pp. 995–1012, 2019.
ista: Gerencser M, Gyöngy I. 2019. A Feynman–Kac formula for stochastic Dirichlet
problems. Stochastic Processes and their Applications. 129(3), 995–1012.
mla: Gerencser, Mate, and István Gyöngy. “A Feynman–Kac Formula for Stochastic Dirichlet
Problems.” Stochastic Processes and Their Applications, vol. 129, no. 3,
Elsevier, 2019, pp. 995–1012, doi:10.1016/j.spa.2018.04.003.
short: M. Gerencser, I. Gyöngy, Stochastic Processes and Their Applications 129
(2019) 995–1012.
date_created: 2018-12-11T11:45:42Z
date_published: 2019-03-01T00:00:00Z
date_updated: 2023-08-24T14:20:49Z
day: '01'
department:
- _id: JaMa
doi: 10.1016/j.spa.2018.04.003
external_id:
arxiv:
- '1611.04177'
isi:
- '000458945300012'
intvolume: ' 129'
isi: 1
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1611.04177
month: '03'
oa: 1
oa_version: Preprint
page: 995-1012
publication: Stochastic Processes and their Applications
publication_status: published
publisher: Elsevier
quality_controlled: '1'
scopus_import: '1'
status: public
title: A Feynman–Kac formula for stochastic Dirichlet problems
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 129
year: '2019'
...
---
_id: '13366'
abstract:
- lang: eng
text: The ability to reversibly assemble nanoparticles using light is both fundamentally
interesting and important for applications ranging from reversible data storage
to controlled drug delivery. Here, the diverse approaches that have so far been
developed to control the self-assembly of nanoparticles using light are reviewed
and compared. These approaches include functionalizing nanoparticles with monolayers
of photoresponsive molecules, placing them in photoresponsive media capable of
reversibly protonating the particles under light, and decorating plasmonic nanoparticles
with thermoresponsive polymers, to name just a few. The applicability of these
methods to larger, micrometer-sized particles is also discussed. Finally, several
perspectives on further developments in the field are offered.
article_number: '1905866'
article_processing_charge: No
article_type: original
author:
- first_name: Tong
full_name: Bian, Tong
last_name: Bian
- first_name: Zonglin
full_name: Chu, Zonglin
last_name: Chu
- first_name: Rafal
full_name: Klajn, Rafal
id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
last_name: Klajn
citation:
ama: Bian T, Chu Z, Klajn R. The many ways to assemble nanoparticles using light.
Advanced Materials. 2019;32(20). doi:10.1002/adma.201905866
apa: Bian, T., Chu, Z., & Klajn, R. (2019). The many ways to assemble nanoparticles
using light. Advanced Materials. Wiley. https://doi.org/10.1002/adma.201905866
chicago: Bian, Tong, Zonglin Chu, and Rafal Klajn. “The Many Ways to Assemble Nanoparticles
Using Light.” Advanced Materials. Wiley, 2019. https://doi.org/10.1002/adma.201905866.
ieee: T. Bian, Z. Chu, and R. Klajn, “The many ways to assemble nanoparticles using
light,” Advanced Materials, vol. 32, no. 20. Wiley, 2019.
ista: Bian T, Chu Z, Klajn R. 2019. The many ways to assemble nanoparticles using
light. Advanced Materials. 32(20), 1905866.
mla: Bian, Tong, et al. “The Many Ways to Assemble Nanoparticles Using Light.” Advanced
Materials, vol. 32, no. 20, 1905866, Wiley, 2019, doi:10.1002/adma.201905866.
short: T. Bian, Z. Chu, R. Klajn, Advanced Materials 32 (2019).
date_created: 2023-08-01T09:37:26Z
date_published: 2019-11-19T00:00:00Z
date_updated: 2024-10-14T12:13:25Z
day: '19'
doi: 10.1002/adma.201905866
extern: '1'
external_id:
pmid:
- '31709655'
intvolume: ' 32'
issue: '20'
keyword:
- Mechanical Engineering
- Mechanics of Materials
- General Materials Science
language:
- iso: eng
month: '11'
oa_version: None
pmid: 1
publication: Advanced Materials
publication_identifier:
eissn:
- 1521-4095
issn:
- 0935-9648
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: The many ways to assemble nanoparticles using light
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 32
year: '2019'
...
---
_id: '13369'
abstract:
- lang: eng
text: Arylazopyrazoles represent a new family of molecular photoswitches characterized
by a near-quantitative conversion between two states and long thermal half-lives
of the metastable state. Here, we investigated the behavior of a model arylazopyrazole
in the presence of a self-assembled cage based on Pd–imidazole coordination. Owing
to its high water solubility, the cage can solubilize the E isomer of arylazopyrazole,
which, by itself, is not soluble in water. NMR spectroscopy and X-ray crystallography
have independently demonstrated that each cage can encapsulate two molecules of
E-arylazopyrazole. UV-induced switching to the Z isomer was accompanied by the
release of one of the two guests from the cage and the formation of a 1:1 cage/Z-arylazopyrazole
inclusion complex. DFT calculations suggest that this process involves a dramatic
change in the conformation of the cage. Back-isomerization was induced with green
light and resulted in the initial 1:2 cage/E-arylazopyrazole complex. This back-isomerization
reaction also proceeded in the dark, with a rate significantly higher than in
the absence of the cage.
article_processing_charge: No
article_type: original
author:
- first_name: Anton I
full_name: Hanopolskyi, Anton I
last_name: Hanopolskyi
- first_name: Soumen
full_name: De, Soumen
last_name: De
- first_name: Michał J
full_name: Białek, Michał J
last_name: Białek
- first_name: Yael
full_name: Diskin-Posner, Yael
last_name: Diskin-Posner
- first_name: Liat
full_name: Avram, Liat
last_name: Avram
- first_name: Moran
full_name: Feller, Moran
last_name: Feller
- first_name: Rafal
full_name: Klajn, Rafal
id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
last_name: Klajn
citation:
ama: Hanopolskyi AI, De S, Białek MJ, et al. Reversible switching of arylazopyrazole
within a metal–organic cage. Beilstein Journal of Organic Chemistry. 2019;15:2398-2407.
doi:10.3762/bjoc.15.232
apa: Hanopolskyi, A. I., De, S., Białek, M. J., Diskin-Posner, Y., Avram, L., Feller,
M., & Klajn, R. (2019). Reversible switching of arylazopyrazole within a metal–organic
cage. Beilstein Journal of Organic Chemistry. Beilstein Institut. https://doi.org/10.3762/bjoc.15.232
chicago: Hanopolskyi, Anton I, Soumen De, Michał J Białek, Yael Diskin-Posner, Liat
Avram, Moran Feller, and Rafal Klajn. “Reversible Switching of Arylazopyrazole
within a Metal–Organic Cage.” Beilstein Journal of Organic Chemistry. Beilstein
Institut, 2019. https://doi.org/10.3762/bjoc.15.232.
ieee: A. I. Hanopolskyi et al., “Reversible switching of arylazopyrazole
within a metal–organic cage,” Beilstein Journal of Organic Chemistry, vol.
15. Beilstein Institut, pp. 2398–2407, 2019.
ista: Hanopolskyi AI, De S, Białek MJ, Diskin-Posner Y, Avram L, Feller M, Klajn
R. 2019. Reversible switching of arylazopyrazole within a metal–organic cage.
Beilstein Journal of Organic Chemistry. 15, 2398–2407.
mla: Hanopolskyi, Anton I., et al. “Reversible Switching of Arylazopyrazole within
a Metal–Organic Cage.” Beilstein Journal of Organic Chemistry, vol. 15,
Beilstein Institut, 2019, pp. 2398–407, doi:10.3762/bjoc.15.232.
short: A.I. Hanopolskyi, S. De, M.J. Białek, Y. Diskin-Posner, L. Avram, M. Feller,
R. Klajn, Beilstein Journal of Organic Chemistry 15 (2019) 2398–2407.
date_created: 2023-08-01T09:38:06Z
date_published: 2019-10-10T00:00:00Z
date_updated: 2024-10-14T12:13:46Z
day: '10'
doi: 10.3762/bjoc.15.232
extern: '1'
external_id:
pmid:
- '31666874'
intvolume: ' 15'
keyword:
- Organic Chemistry
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.3762/bjoc.15.232
month: '10'
oa: 1
oa_version: Published Version
page: 2398-2407
pmid: 1
publication: Beilstein Journal of Organic Chemistry
publication_identifier:
eissn:
- 1860-5397
publication_status: published
publisher: Beilstein Institut
quality_controlled: '1'
scopus_import: '1'
status: public
title: Reversible switching of arylazopyrazole within a metal–organic cage
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 15
year: '2019'
...
---
_id: '13370'
abstract:
- lang: eng
text: Efficient isomerization of photochromic molecules often requires conformational
freedom and is typically not available under solvent-free conditions. Here, we
report a general methodology allowing for reversible switching of such molecules
on the surfaces of solid materials. Our method is based on dispersing photochromic
compounds within polysilsesquioxane nanowire networks (PNNs), which can be fabricated
as transparent, highly porous, micrometer-thick layers on various substrates.
We found that azobenzene switching within the PNNs proceeded unusually fast compared
with the same molecules in liquid solvents. Efficient isomerization of another
photochromic system, spiropyran, from a colorless to a colored form was used to
create reversible images in PNN-coated glass. The coloration reaction could be
induced with sunlight and is of interest for developing “smart” windows.
article_processing_charge: No
article_type: original
author:
- first_name: Zonglin
full_name: Chu, Zonglin
last_name: Chu
- first_name: Rafal
full_name: Klajn, Rafal
id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
last_name: Klajn
citation:
ama: Chu Z, Klajn R. Polysilsesquioxane nanowire networks as an “Artificial Solvent”
for reversible operation of photochromic molecules. Nano Letters. 2019;19(10):7106-7111.
doi:10.1021/acs.nanolett.9b02642
apa: Chu, Z., & Klajn, R. (2019). Polysilsesquioxane nanowire networks as an
“Artificial Solvent” for reversible operation of photochromic molecules. Nano
Letters. American Chemical Society. https://doi.org/10.1021/acs.nanolett.9b02642
chicago: Chu, Zonglin, and Rafal Klajn. “Polysilsesquioxane Nanowire Networks as
an ‘Artificial Solvent’ for Reversible Operation of Photochromic Molecules.” Nano
Letters. American Chemical Society, 2019. https://doi.org/10.1021/acs.nanolett.9b02642.
ieee: Z. Chu and R. Klajn, “Polysilsesquioxane nanowire networks as an ‘Artificial
Solvent’ for reversible operation of photochromic molecules,” Nano Letters,
vol. 19, no. 10. American Chemical Society, pp. 7106–7111, 2019.
ista: Chu Z, Klajn R. 2019. Polysilsesquioxane nanowire networks as an “Artificial
Solvent” for reversible operation of photochromic molecules. Nano Letters. 19(10),
7106–7111.
mla: Chu, Zonglin, and Rafal Klajn. “Polysilsesquioxane Nanowire Networks as an
‘Artificial Solvent’ for Reversible Operation of Photochromic Molecules.” Nano
Letters, vol. 19, no. 10, American Chemical Society, 2019, pp. 7106–11, doi:10.1021/acs.nanolett.9b02642.
short: Z. Chu, R. Klajn, Nano Letters 19 (2019) 7106–7111.
date_created: 2023-08-01T09:38:23Z
date_published: 2019-09-20T00:00:00Z
date_updated: 2024-10-14T12:13:57Z
day: '20'
doi: 10.1021/acs.nanolett.9b02642
extern: '1'
external_id:
pmid:
- '31539469'
intvolume: ' 19'
issue: '10'
keyword:
- Mechanical Engineering
- Condensed Matter Physics
- General Materials Science
- General Chemistry
- Bioengineering
language:
- iso: eng
month: '09'
oa_version: None
page: 7106-7111
pmid: 1
publication: Nano Letters
publication_identifier:
eissn:
- 1530-6992
issn:
- 1530-6984
publication_status: published
publisher: American Chemical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Polysilsesquioxane nanowire networks as an “Artificial Solvent” for reversible
operation of photochromic molecules
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 19
year: '2019'
...
---
_id: '13371'
abstract:
- lang: eng
text: Diamondoid nanoporous crystals represent a synthetically challenging class
of materials that typically have been obtained from tetrahedral building blocks.
In this issue of Chem, Stoddart and coworkers demonstrate that it is possible
to generate diamondoid frameworks from a hexacationic building block lacking a
tetrahedral symmetry. These results highlight the great potential of self-assembly
for rapidly transforming small molecules into structurally complex functional
materials.
article_processing_charge: No
article_type: original
author:
- first_name: Michał J.
full_name: Białek, Michał J.
last_name: Białek
- first_name: Rafal
full_name: Klajn, Rafal
id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
last_name: Klajn
citation:
ama: Białek MJ, Klajn R. Diamond grows up. Chem. 2019;5(9):2283-2285. doi:10.1016/j.chempr.2019.08.012
apa: Białek, M. J., & Klajn, R. (2019). Diamond grows up. Chem. Elsevier.
https://doi.org/10.1016/j.chempr.2019.08.012
chicago: Białek, Michał J., and Rafal Klajn. “Diamond Grows Up.” Chem. Elsevier,
2019. https://doi.org/10.1016/j.chempr.2019.08.012.
ieee: M. J. Białek and R. Klajn, “Diamond grows up,” Chem, vol. 5, no. 9.
Elsevier, pp. 2283–2285, 2019.
ista: Białek MJ, Klajn R. 2019. Diamond grows up. Chem. 5(9), 2283–2285.
mla: Białek, Michał J., and Rafal Klajn. “Diamond Grows Up.” Chem, vol. 5,
no. 9, Elsevier, 2019, pp. 2283–85, doi:10.1016/j.chempr.2019.08.012.
short: M.J. Białek, R. Klajn, Chem 5 (2019) 2283–2285.
date_created: 2023-08-01T09:38:38Z
date_published: 2019-09-12T00:00:00Z
date_updated: 2024-10-14T12:14:05Z
day: '12'
doi: 10.1016/j.chempr.2019.08.012
extern: '1'
intvolume: ' 5'
issue: '9'
keyword:
- Materials Chemistry
- Biochemistry (medical)
- General Chemical Engineering
- Environmental Chemistry
- Biochemistry
- General Chemistry
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1016/j.chempr.2019.08.012
month: '09'
oa: 1
oa_version: Published Version
page: 2283-2285
publication: Chem
publication_identifier:
eissn:
- 2451-9294
issn:
- 2451-9308
publication_status: published
publisher: Elsevier
quality_controlled: '1'
scopus_import: '1'
status: public
title: Diamond grows up
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 5
year: '2019'
...
---
_id: '13372'
abstract:
- lang: eng
text: 'The capacity to respond or adapt to environmental changes is an intrinsic
property of living systems that comprise highly-connected subcomponents communicating
through chemical networks. The development of responsive synthetic systems is
a relatively new research area that covers different disciplines, among which
nanochemistry brings conceptually new demonstrations. Especially attractive are
ligand-protected gold nanoparticles, which have been extensively used over the
last decade as building blocks in constructing superlattices or dynamic aggregates,
under the effect of an applied stimulus. To reflect the importance of surface
chemistry and nanoparticle core composition in the dynamic self-assembly of nanoparticles,
we provide here an overview of various available stimuli, as tools for synthetic
chemists to exploit. Along with this task, the review starts with the use of chemical
stimuli such as solvent, pH, gases, metal ions or biomolecules. It then focuses
on physical stimuli: temperature, magnetic and electric fields, as well as light.
To reflect on the increasing complexity of current architectures, we discuss systems
that are responsive to more than one stimulus, to finally encourage further research
by proposing future challenges.'
article_processing_charge: No
article_type: original
author:
- first_name: Marek
full_name: Grzelczak, Marek
last_name: Grzelczak
- first_name: Luis M.
full_name: Liz-Marzán, Luis M.
last_name: Liz-Marzán
- first_name: Rafal
full_name: Klajn, Rafal
id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
last_name: Klajn
citation:
ama: Grzelczak M, Liz-Marzán LM, Klajn R. Stimuli-responsive self-assembly of nanoparticles.
Chemical Society Reviews. 2019;48(5):1342-1361. doi:10.1039/c8cs00787j
apa: Grzelczak, M., Liz-Marzán, L. M., & Klajn, R. (2019). Stimuli-responsive
self-assembly of nanoparticles. Chemical Society Reviews. Royal Society
of Chemistry. https://doi.org/10.1039/c8cs00787j
chicago: Grzelczak, Marek, Luis M. Liz-Marzán, and Rafal Klajn. “Stimuli-Responsive
Self-Assembly of Nanoparticles.” Chemical Society Reviews. Royal Society
of Chemistry, 2019. https://doi.org/10.1039/c8cs00787j.
ieee: M. Grzelczak, L. M. Liz-Marzán, and R. Klajn, “Stimuli-responsive self-assembly
of nanoparticles,” Chemical Society Reviews, vol. 48, no. 5. Royal Society
of Chemistry, pp. 1342–1361, 2019.
ista: Grzelczak M, Liz-Marzán LM, Klajn R. 2019. Stimuli-responsive self-assembly
of nanoparticles. Chemical Society Reviews. 48(5), 1342–1361.
mla: Grzelczak, Marek, et al. “Stimuli-Responsive Self-Assembly of Nanoparticles.”
Chemical Society Reviews, vol. 48, no. 5, Royal Society of Chemistry, 2019,
pp. 1342–61, doi:10.1039/c8cs00787j.
short: M. Grzelczak, L.M. Liz-Marzán, R. Klajn, Chemical Society Reviews 48 (2019)
1342–1361.
date_created: 2023-08-01T09:38:52Z
date_published: 2019-01-28T00:00:00Z
date_updated: 2024-10-14T12:14:14Z
day: '28'
doi: 10.1039/c8cs00787j
extern: '1'
external_id:
pmid:
- '30688963'
intvolume: ' 48'
issue: '5'
keyword:
- General Chemistry
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1039/C8CS00787J
month: '01'
oa: 1
oa_version: Published Version
page: 1342-1361
pmid: 1
publication: Chemical Society Reviews
publication_identifier:
eissn:
- 1460-4744
issn:
- 0306-0012
publication_status: published
publisher: Royal Society of Chemistry
quality_controlled: '1'
scopus_import: '1'
status: public
title: Stimuli-responsive self-assembly of nanoparticles
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 48
year: '2019'
...
---
_id: '13373'
abstract:
- lang: eng
text: The reversible photoisomerization of azobenzene has been utilized to construct
a plethora of systems in which optical, electronic, catalytic, and other properties
can be controlled by light. However, owing to azobenzene’s hydrophobic nature,
most of these examples have been realized only in organic solvents, and systems
operating in water are relatively scarce. Here, we show that by coadsorbing the
inherently hydrophobic azobenzenes with water-solubilizing ligands on the same
nanoparticulate platforms, it is possible to render them essentially water-soluble.
To this end, we developed a modified nanoparticle functionalization procedure
allowing us to precisely fine-tune the amount of azobenzene on the functionalized
nanoparticles. Molecular dynamics simulations helped us to identify two distinct
supramolecular architectures (depending on the length of the background ligand)
on these nanoparticles, which can explain their excellent aqueous solubilities.
Azobenzenes adsorbed on these water-soluble nanoparticles exhibit highly reversible
photoisomerization upon exposure to UV and visible light. Importantly, the mixed-monolayer
approach allowed us to systematically investigate how the background ligand affects
the switching properties of azobenzene. We found that the nature of the background
ligand has a profound effect on the kinetics of azobenzene switching. For example,
a hydroxy-terminated background ligand is capable of accelerating the back-isomerization
reaction by more than 6000-fold. These results pave the way toward the development
of novel light-responsive nanomaterials operating in aqueous media and, in the
long run, in biological environments.
article_processing_charge: No
article_type: original
author:
- first_name: Zonglin
full_name: Chu, Zonglin
last_name: Chu
- first_name: Yanxiao
full_name: Han, Yanxiao
last_name: Han
- first_name: Tong
full_name: Bian, Tong
last_name: Bian
- first_name: Soumen
full_name: De, Soumen
last_name: De
- first_name: Petr
full_name: Král, Petr
last_name: Král
- first_name: Rafal
full_name: Klajn, Rafal
id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
last_name: Klajn
citation:
ama: Chu Z, Han Y, Bian T, De S, Král P, Klajn R. Supramolecular control of azobenzene
switching on nanoparticles. Journal of the American Chemical Society. 2019;141(5):1949-1960.
doi:10.1021/jacs.8b09638
apa: Chu, Z., Han, Y., Bian, T., De, S., Král, P., & Klajn, R. (2019). Supramolecular
control of azobenzene switching on nanoparticles. Journal of the American Chemical
Society. American Chemical Society. https://doi.org/10.1021/jacs.8b09638
chicago: Chu, Zonglin, Yanxiao Han, Tong Bian, Soumen De, Petr Král, and Rafal Klajn.
“Supramolecular Control of Azobenzene Switching on Nanoparticles.” Journal
of the American Chemical Society. American Chemical Society, 2019. https://doi.org/10.1021/jacs.8b09638.
ieee: Z. Chu, Y. Han, T. Bian, S. De, P. Král, and R. Klajn, “Supramolecular control
of azobenzene switching on nanoparticles,” Journal of the American Chemical
Society, vol. 141, no. 5. American Chemical Society, pp. 1949–1960, 2019.
ista: Chu Z, Han Y, Bian T, De S, Král P, Klajn R. 2019. Supramolecular control
of azobenzene switching on nanoparticles. Journal of the American Chemical Society.
141(5), 1949–1960.
mla: Chu, Zonglin, et al. “Supramolecular Control of Azobenzene Switching on Nanoparticles.”
Journal of the American Chemical Society, vol. 141, no. 5, American Chemical
Society, 2019, pp. 1949–60, doi:10.1021/jacs.8b09638.
short: Z. Chu, Y. Han, T. Bian, S. De, P. Král, R. Klajn, Journal of the American
Chemical Society 141 (2019) 1949–1960.
date_created: 2023-08-01T09:39:19Z
date_published: 2019-02-06T00:00:00Z
date_updated: 2024-10-14T12:14:23Z
day: '06'
doi: 10.1021/jacs.8b09638
extern: '1'
external_id:
pmid:
- '30595017'
intvolume: ' 141'
issue: '5'
keyword:
- Colloid and Surface Chemistry
- Biochemistry
- General Chemistry
- Catalysis
language:
- iso: eng
month: '02'
oa_version: Published Version
page: 1949-1960
pmid: 1
publication: Journal of the American Chemical Society
publication_identifier:
eissn:
- 1520-5126
issn:
- 0002-7863
publication_status: published
publisher: American Chemical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Supramolecular control of azobenzene switching on nanoparticles
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 141
year: '2019'
...
---
_id: '13468'
abstract:
- lang: eng
text: Hydrogen-rich supernovae, known as Type II (SNe II), are the most common class
of explosions observed following the collapse of the core of massive stars. We
used analytical estimates and population synthesis simulations to assess the fraction
of SNe II progenitors that are expected to have exchanged mass with a companion
prior to explosion. We estimate that 1/3 to 1/2 of SN II progenitors have a history
of mass exchange with a binary companion before exploding. The dominant binary
channels leading to SN II progenitors involve the merger of binary stars. Mergers
are expected to produce a diversity of SN II progenitor characteristics, depending
on the evolutionary timing and properties of the merger. Alternatively, SN II
progenitors from interacting binaries may have accreted mass from their companion,
and subsequently been ejected from the binary system after their companion exploded.
We show that the overall fraction of SN II progenitors that are predicted to have
experienced binary interaction is robust against the main physical uncertainties
in our models. However, the relative importance of different binary evolutionary
channels is affected by changing physical assumptions. We further discuss ways
in which binarity might contribute to the observed diversity of SNe II by considering
potential observational signatures arising from each binary channel. For supernovae
which have a substantial H-rich envelope at explosion (i.e., excluding Type IIb
SNe), a surviving non-compact companion would typically indicate that the supernova
progenitor star was in a wide, non-interacting binary. We argue that a significant
fraction of even Type II-P SNe are expected to have gained mass from a companion
prior to explosion.
article_number: A5
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Emmanouil
full_name: Zapartas, Emmanouil
last_name: Zapartas
- first_name: Selma E.
full_name: de Mink, Selma E.
last_name: de Mink
- first_name: Stephen
full_name: Justham, Stephen
last_name: Justham
- first_name: Nathan
full_name: Smith, Nathan
last_name: Smith
- first_name: Alex
full_name: de Koter, Alex
last_name: de Koter
- first_name: Mathieu
full_name: Renzo, Mathieu
last_name: Renzo
- first_name: Iair
full_name: Arcavi, Iair
last_name: Arcavi
- first_name: Rob
full_name: Farmer, Rob
last_name: Farmer
- first_name: Ylva Louise Linsdotter
full_name: Götberg, Ylva Louise Linsdotter
id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d
last_name: Götberg
orcid: 0000-0002-6960-6911
- first_name: Silvia
full_name: Toonen, Silvia
last_name: Toonen
citation:
ama: 'Zapartas E, de Mink SE, Justham S, et al. The diverse lives of progenitors
of hydrogen-rich core-collapse supernovae: The role of binary interaction. Astronomy
& Astrophysics. 2019;631. doi:10.1051/0004-6361/201935854'
apa: 'Zapartas, E., de Mink, S. E., Justham, S., Smith, N., de Koter, A., Renzo,
M., … Toonen, S. (2019). The diverse lives of progenitors of hydrogen-rich core-collapse
supernovae: The role of binary interaction. Astronomy & Astrophysics.
EDP Sciences. https://doi.org/10.1051/0004-6361/201935854'
chicago: 'Zapartas, Emmanouil, Selma E. de Mink, Stephen Justham, Nathan Smith,
Alex de Koter, Mathieu Renzo, Iair Arcavi, Rob Farmer, Ylva Louise Linsdotter
Götberg, and Silvia Toonen. “The Diverse Lives of Progenitors of Hydrogen-Rich
Core-Collapse Supernovae: The Role of Binary Interaction.” Astronomy &
Astrophysics. EDP Sciences, 2019. https://doi.org/10.1051/0004-6361/201935854.'
ieee: 'E. Zapartas et al., “The diverse lives of progenitors of hydrogen-rich
core-collapse supernovae: The role of binary interaction,” Astronomy &
Astrophysics, vol. 631. EDP Sciences, 2019.'
ista: 'Zapartas E, de Mink SE, Justham S, Smith N, de Koter A, Renzo M, Arcavi I,
Farmer R, Götberg YLL, Toonen S. 2019. The diverse lives of progenitors of hydrogen-rich
core-collapse supernovae: The role of binary interaction. Astronomy & Astrophysics.
631, A5.'
mla: 'Zapartas, Emmanouil, et al. “The Diverse Lives of Progenitors of Hydrogen-Rich
Core-Collapse Supernovae: The Role of Binary Interaction.” Astronomy &
Astrophysics, vol. 631, A5, EDP Sciences, 2019, doi:10.1051/0004-6361/201935854.'
short: E. Zapartas, S.E. de Mink, S. Justham, N. Smith, A. de Koter, M. Renzo, I.
Arcavi, R. Farmer, Y.L.L. Götberg, S. Toonen, Astronomy & Astrophysics 631
(2019).
date_created: 2023-08-03T10:13:52Z
date_published: 2019-11-20T00:00:00Z
date_updated: 2023-08-09T12:36:09Z
day: '20'
doi: 10.1051/0004-6361/201935854
extern: '1'
external_id:
arxiv:
- '1907.06687'
intvolume: ' 631'
keyword:
- Space and Planetary Science
- Astronomy and Astrophysics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1051/0004-6361/201935854
month: '11'
oa: 1
oa_version: Published Version
publication: Astronomy & Astrophysics
publication_identifier:
eissn:
- 1432-0746
issn:
- 0004-6361
publication_status: published
publisher: EDP Sciences
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'The diverse lives of progenitors of hydrogen-rich core-collapse supernovae:
The role of binary interaction'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 631
year: '2019'
...
---
_id: '13469'
abstract:
- lang: eng
text: Stars stripped of their envelopes from interaction with a binary companion
emit a significant fraction of their radiation as ionizing photons. They are potentially
important stellar sources of ionizing radiation, however, they are still often
neglected in spectral synthesis simulations or simulations of stellar feedback.
In anticipating the large datasets of galaxy spectra from the upcoming James Webb
Space Telescope, we modeled the radiative contribution from stripped stars by
using detailed evolutionary and spectral models. We estimated their impact on
the integrated spectra and specifically on the emission rates of H I-, He I-,
and He II-ionizing photons from stellar populations. We find that stripped stars
have the largest impact on the ionizing spectrum of a population in which star
formation halted several Myr ago. In such stellar populations, stripped stars
dominate the emission of ionizing photons, mimicking a younger stellar population
in which massive stars are still present. Our models also suggest that stripped
stars have harder ionizing spectra than massive stars. The additional ionizing
radiation, with which stripped stars contribute affects observable properties
that are related to the emission of ionizing photons from stellar populations.
In co-eval stellar populations, the ionizing radiation from stripped stars increases
the ionization parameter and the production efficiency of hydrogen ionizing photons.
They also cause high values for these parameters for about ten times longer than
what is predicted for massive stars. The effect on properties related to non-ionizing
wavelengths is less pronounced, such as on the ultraviolet continuum slope or
stellar contribution to emission lines. However, the hard ionizing radiation from
stripped stars likely introduces a characteristic ionization structure of the
nebula, which leads to the emission of highly ionized elements such as O2+ and
C3+. We, therefore, expect that the presence of stripped stars affects the location
in the BPT diagram and the diagnostic ratio of O III to O II nebular emission
lines. Our models are publicly available through CDS database and on the STARBURST99
website.
article_number: A134
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Ylva Louise Linsdotter
full_name: Götberg, Ylva Louise Linsdotter
id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d
last_name: Götberg
orcid: 0000-0002-6960-6911
- first_name: S. E.
full_name: de Mink, S. E.
last_name: de Mink
- first_name: J. H.
full_name: Groh, J. H.
last_name: Groh
- first_name: C.
full_name: Leitherer, C.
last_name: Leitherer
- first_name: C.
full_name: Norman, C.
last_name: Norman
citation:
ama: Götberg YLL, de Mink SE, Groh JH, Leitherer C, Norman C. The impact of stars
stripped in binaries on the integrated spectra of stellar populations. Astronomy
& Astrophysics. 2019;629. doi:10.1051/0004-6361/201834525
apa: Götberg, Y. L. L., de Mink, S. E., Groh, J. H., Leitherer, C., & Norman,
C. (2019). The impact of stars stripped in binaries on the integrated spectra
of stellar populations. Astronomy & Astrophysics. EDP Sciences. https://doi.org/10.1051/0004-6361/201834525
chicago: Götberg, Ylva Louise Linsdotter, S. E. de Mink, J. H. Groh, C. Leitherer,
and C. Norman. “The Impact of Stars Stripped in Binaries on the Integrated Spectra
of Stellar Populations.” Astronomy & Astrophysics. EDP Sciences, 2019.
https://doi.org/10.1051/0004-6361/201834525.
ieee: Y. L. L. Götberg, S. E. de Mink, J. H. Groh, C. Leitherer, and C. Norman,
“The impact of stars stripped in binaries on the integrated spectra of stellar
populations,” Astronomy & Astrophysics, vol. 629. EDP Sciences, 2019.
ista: Götberg YLL, de Mink SE, Groh JH, Leitherer C, Norman C. 2019. The impact
of stars stripped in binaries on the integrated spectra of stellar populations.
Astronomy & Astrophysics. 629, A134.
mla: Götberg, Ylva Louise Linsdotter, et al. “The Impact of Stars Stripped in Binaries
on the Integrated Spectra of Stellar Populations.” Astronomy & Astrophysics,
vol. 629, A134, EDP Sciences, 2019, doi:10.1051/0004-6361/201834525.
short: Y.L.L. Götberg, S.E. de Mink, J.H. Groh, C. Leitherer, C. Norman, Astronomy
& Astrophysics 629 (2019).
date_created: 2023-08-03T10:14:00Z
date_published: 2019-09-17T00:00:00Z
date_updated: 2024-10-14T12:22:42Z
day: '17'
doi: 10.1051/0004-6361/201834525
extern: '1'
external_id:
arxiv:
- '1908.06102'
intvolume: ' 629'
keyword:
- Space and Planetary Science
- Astronomy and Astrophysics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1051/0004-6361/201834525
month: '09'
oa: 1
oa_version: Published Version
publication: Astronomy & Astrophysics
publication_identifier:
eissn:
- 1432-0746
issn:
- 0004-6361
publication_status: published
publisher: EDP Sciences
quality_controlled: '1'
scopus_import: '1'
status: public
title: The impact of stars stripped in binaries on the integrated spectra of stellar
populations
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 629
year: '2019'
...
---
_id: '13470'
abstract:
- lang: eng
text: "Context. Massive Wolf–Rayet (WR) stars dominate the radiative and mechanical
energy budget of galaxies and probe a critical phase in the evolution of massive
stars prior to core collapse. It is not known whether core He-burning WR stars
(classical WR; cWR) form predominantly through wind stripping (w-WR) or binary
stripping (b-WR). Whereas spectroscopy of WR binaries has so-far largely been
avoided because of its complexity, our study focuses on the 44 WR binaries and
binary candidates of the Large Magellanic Cloud (LMC; metallicity Z ≈ 0.5 Z⊙),
which were identified on the basis of radial velocity variations, composite spectra,
or high X-ray luminosities.\r\n\r\nAims. Relying on a diverse spectroscopic database,
we aim to derive the physical and orbital parameters of our targets, confronting
evolution models of evolved massive stars at subsolar metallicity and constraining
the impact of binary interaction in forming these stars.\r\n\r\nMethods. Spectroscopy
was performed using the Potsdam Wolf–Rayet (PoWR) code and cross-correlation techniques.
Disentanglement was performed using the code Spectangular or the shift-and-add
algorithm. Evolutionary status was interpreted using the Binary Population and
Spectral Synthesis (BPASS) code, exploring binary interaction and chemically homogeneous
evolution.\r\n\r\nResults. Among our sample, 28/44 objects show composite spectra
and are analyzed as such. An additional five targets show periodically moving
WR primaries but no detected companions (SB1); two (BAT99 99 and 112) are potential
WR + compact-object candidates owing to their high X-ray luminosities. We cannot
confirm the binary nature of the remaining 11 candidates. About two-thirds of
the WN components in binaries are identified as cWR, and one-third as hydrogen-burning
WR stars. We establish metallicity-dependent mass-loss recipes, which broadly
agree with those recently derived for single WN stars, and in which so-called
WN3/O3 stars are clear outliers. We estimate that 45 ± 30% of the cWR stars
in our sample have interacted with a companion via mass transfer. However, only
≈12 ± 7% of the cWR stars in our sample naively appear to have formed purely
owing to stripping via a companion (12% b-WR). Assuming that apparently single
WR stars truly formed as single stars, this comprises ≈4% of the whole LMC WN
population, which is about ten times less than expected. No obvious differences
in the properties of single and binary WN stars, whose luminosities extend down
to log L ≈ 5.2 [L⊙], are apparent. With the exception of a few systems (BAT99
19, 49, and 103), the equatorial rotational velocities of the OB-type companions
are moderate (veq ≲ 250 km s−1) and challenge standard formalisms of angular-momentum
accretion. For most objects, chemically homogeneous evolution can be rejected
for the secondary, but not for the WR progenitor.\r\n\r\nConclusions. No obvious
dichotomy in the locations of apparently single and binary WN stars on the Hertzsprung-Russell
diagram is apparent. According to commonly used stellar evolution models (BPASS,
Geneva), most apparently single WN stars could not have formed as single stars,
implying that they were stripped by an undetected companion. Otherwise, it must
follow that pre-WR mass-loss/mixing (e.g., during the red supergiant phase) are
strongly underestimated in standard stellar evolution models."
article_number: A151
article_processing_charge: No
article_type: original
author:
- first_name: T.
full_name: Shenar, T.
last_name: Shenar
- first_name: D. P.
full_name: Sablowski, D. P.
last_name: Sablowski
- first_name: R.
full_name: Hainich, R.
last_name: Hainich
- first_name: H.
full_name: Todt, H.
last_name: Todt
- first_name: A. F. J.
full_name: Moffat, A. F. J.
last_name: Moffat
- first_name: L. M.
full_name: Oskinova, L. M.
last_name: Oskinova
- first_name: V.
full_name: Ramachandran, V.
last_name: Ramachandran
- first_name: H.
full_name: Sana, H.
last_name: Sana
- first_name: A. A. C.
full_name: Sander, A. A. C.
last_name: Sander
- first_name: O.
full_name: Schnurr, O.
last_name: Schnurr
- first_name: N.
full_name: St-Louis, N.
last_name: St-Louis
- first_name: D.
full_name: Vanbeveren, D.
last_name: Vanbeveren
- first_name: Ylva Louise Linsdotter
full_name: Götberg, Ylva Louise Linsdotter
id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d
last_name: Götberg
orcid: 0000-0002-6960-6911
- first_name: W.-R.
full_name: Hamann, W.-R.
last_name: Hamann
citation:
ama: Shenar T, Sablowski DP, Hainich R, et al. The Wolf–Rayet binaries of the nitrogen
sequence in the Large Magellanic Cloud. Astronomy & Astrophysics. 2019;627.
doi:10.1051/0004-6361/201935684
apa: Shenar, T., Sablowski, D. P., Hainich, R., Todt, H., Moffat, A. F. J., Oskinova,
L. M., … Hamann, W.-R. (2019). The Wolf–Rayet binaries of the nitrogen sequence
in the Large Magellanic Cloud. Astronomy & Astrophysics. EDP Sciences.
https://doi.org/10.1051/0004-6361/201935684
chicago: Shenar, T., D. P. Sablowski, R. Hainich, H. Todt, A. F. J. Moffat, L. M.
Oskinova, V. Ramachandran, et al. “The Wolf–Rayet Binaries of the Nitrogen Sequence
in the Large Magellanic Cloud.” Astronomy & Astrophysics. EDP Sciences,
2019. https://doi.org/10.1051/0004-6361/201935684.
ieee: T. Shenar et al., “The Wolf–Rayet binaries of the nitrogen sequence
in the Large Magellanic Cloud,” Astronomy & Astrophysics, vol. 627.
EDP Sciences, 2019.
ista: Shenar T, Sablowski DP, Hainich R, Todt H, Moffat AFJ, Oskinova LM, Ramachandran
V, Sana H, Sander AAC, Schnurr O, St-Louis N, Vanbeveren D, Götberg YLL, Hamann
W-R. 2019. The Wolf–Rayet binaries of the nitrogen sequence in the Large Magellanic
Cloud. Astronomy & Astrophysics. 627, A151.
mla: Shenar, T., et al. “The Wolf–Rayet Binaries of the Nitrogen Sequence in the
Large Magellanic Cloud.” Astronomy & Astrophysics, vol. 627, A151,
EDP Sciences, 2019, doi:10.1051/0004-6361/201935684.
short: T. Shenar, D.P. Sablowski, R. Hainich, H. Todt, A.F.J. Moffat, L.M. Oskinova,
V. Ramachandran, H. Sana, A.A.C. Sander, O. Schnurr, N. St-Louis, D. Vanbeveren,
Y.L.L. Götberg, W.-R. Hamann, Astronomy & Astrophysics 627 (2019).
date_created: 2023-08-03T10:14:09Z
date_published: 2019-07-16T00:00:00Z
date_updated: 2023-08-09T12:29:58Z
day: '16'
doi: 10.1051/0004-6361/201935684
extern: '1'
intvolume: ' 627'
keyword:
- Space and Planetary Science
- Astronomy and Astrophysics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1051/0004-6361/201935684
month: '07'
oa: 1
oa_version: Published Version
publication: Astronomy & Astrophysics
publication_identifier:
eissn:
- 1432-0746
issn:
- 0004-6361
publication_status: published
publisher: EDP Sciences
quality_controlled: '1'
related_material:
link:
- relation: erratum
url: https://doi.org/10.1051/0004-6361/201935684e
scopus_import: '1'
status: public
title: The Wolf–Rayet binaries of the nitrogen sequence in the Large Magellanic Cloud
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 627
year: '2019'
...
---
_id: '13471'
abstract:
- lang: eng
text: We perform an extensive numerical study of the evolution of massive binary
systems to predict the peculiar velocities that stars obtain when their companion
collapses and disrupts the system. Our aim is to (i) identify which predictions
are robust against model uncertainties and assess their implications, (ii) investigate
which physical processes leave a clear imprint and may therefore be constrained
observationally, and (iii) provide a suite of publicly available model predictions
to allow for the use of kinematic constraints from the Gaia mission. We find that
22+26−8% of all massive binary systems merge prior to the first core-collapse
in the system. Of the remainder, 86+11−9% become unbound because of the core-collapse.
Remarkably, this rarely produces runaway stars (observationally defined as stars
with velocities above 30 km s−1). These are outnumbered by more than an order
of magnitude by slower unbound companions, or “walkaway stars”. This is a robust
outcome of our simulations and is due to the reversal of the mass ratio prior
to the explosion and widening of the orbit, as we show analytically and numerically.
For stars more massive than 15 M⊙, we estimate that 10+5−8% are walkaways and
only 0.5+1.0−0.4% are runaways, nearly all of which have accreted mass from their
companion. Our findings are consistent with earlier studies; however, the low
runaway fraction we find is in tension with observed fractions of about 10%. Thus,
astrometric data on presently single massive stars can potentially constrain the
physics of massive binary evolution. Finally, we show that the high end of the
mass distributions of runaway stars is very sensitive to the assumed black hole
natal kicks, and we propose this as a potentially stringent test for the explosion
mechanism. We also discuss companions remaining bound that can evolve into X-ray
and gravitational wave sources.
article_number: A66
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: M.
full_name: Renzo, M.
last_name: Renzo
- first_name: E.
full_name: Zapartas, E.
last_name: Zapartas
- first_name: S. E.
full_name: de Mink, S. E.
last_name: de Mink
- first_name: Ylva Louise Linsdotter
full_name: Götberg, Ylva Louise Linsdotter
id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d
last_name: Götberg
orcid: 0000-0002-6960-6911
- first_name: S.
full_name: Justham, S.
last_name: Justham
- first_name: R. J.
full_name: Farmer, R. J.
last_name: Farmer
- first_name: R. G.
full_name: Izzard, R. G.
last_name: Izzard
- first_name: S.
full_name: Toonen, S.
last_name: Toonen
- first_name: H.
full_name: Sana, H.
last_name: Sana
citation:
ama: Renzo M, Zapartas E, de Mink SE, et al. Massive runaway and walkaway stars.
Astronomy & Astrophysics. 2019;624. doi:10.1051/0004-6361/201833297
apa: Renzo, M., Zapartas, E., de Mink, S. E., Götberg, Y. L. L., Justham, S., Farmer,
R. J., … Sana, H. (2019). Massive runaway and walkaway stars. Astronomy &
Astrophysics. EDP Sciences. https://doi.org/10.1051/0004-6361/201833297
chicago: Renzo, M., E. Zapartas, S. E. de Mink, Ylva Louise Linsdotter Götberg,
S. Justham, R. J. Farmer, R. G. Izzard, S. Toonen, and H. Sana. “Massive Runaway
and Walkaway Stars.” Astronomy & Astrophysics. EDP Sciences, 2019.
https://doi.org/10.1051/0004-6361/201833297.
ieee: M. Renzo et al., “Massive runaway and walkaway stars,” Astronomy
& Astrophysics, vol. 624. EDP Sciences, 2019.
ista: Renzo M, Zapartas E, de Mink SE, Götberg YLL, Justham S, Farmer RJ, Izzard
RG, Toonen S, Sana H. 2019. Massive runaway and walkaway stars. Astronomy &
Astrophysics. 624, A66.
mla: Renzo, M., et al. “Massive Runaway and Walkaway Stars.” Astronomy &
Astrophysics, vol. 624, A66, EDP Sciences, 2019, doi:10.1051/0004-6361/201833297.
short: M. Renzo, E. Zapartas, S.E. de Mink, Y.L.L. Götberg, S. Justham, R.J. Farmer,
R.G. Izzard, S. Toonen, H. Sana, Astronomy & Astrophysics 624 (2019).
date_created: 2023-08-03T10:14:18Z
date_published: 2019-04-11T00:00:00Z
date_updated: 2023-08-09T12:26:08Z
day: '11'
doi: 10.1051/0004-6361/201833297
extern: '1'
external_id:
arxiv:
- '1804.09164'
intvolume: ' 624'
keyword:
- Space and Planetary Science
- Astronomy and Astrophysics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1051/0004-6361/201833297
month: '04'
oa: 1
oa_version: Published Version
publication: Astronomy & Astrophysics
publication_identifier:
eissn:
- 1432-0746
issn:
- 0004-6361
publication_status: published
publisher: EDP Sciences
quality_controlled: '1'
scopus_import: '1'
status: public
title: Massive runaway and walkaway stars
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 624
year: '2019'
...
---
_id: '13472'
abstract:
- lang: eng
text: Massive stars in binaries can give rise to extreme phenomena such as X-ray
binaries and gravitational wave sources after one or both stars end their lives
as core-collapse supernovae. Stars in close orbit around a stellar or compact
companion are expected to explode as “stripped-envelope supernovae”, showing no
(Type Ib/c) or little (Type IIb) signs of hydrogen in the spectra, because hydrogen-rich
progenitors are too large to fit. The physical processes responsible for the stripping
process and the fate of the companion are still very poorly understood. Aiming
to find new clues, we investigate Cas A, which is a very young (∼340 yr) and near
(∼3.4 kpc) remnant of a core-collapse supernova. Cas A has been subject to several
searches for possible companions, all unsuccessfully. We present new measurements
of the proper motions and photometry of stars in the vicinity based on deep HST
ACS/WFC and WFC3-IR data. We identify stellar sources that are close enough in
projection but using their proper motions we show that none are compatible with
being at the location of center at the time of explosion, in agreement with earlier
findings. Our photometric measurements allow us to place much deeper (order-of-magnitude)
upper limits on the brightness of possible undetected companions. We systematically
compare them with model predictions for a wide variety of scenarios. We can confidently
rule out the presence of any stellar companion of any reasonable mass and age
(main sequence, pre main sequence or stripped) ruling out what many considered
to be likely evolutionary scenarios for Type IIb supernova (SN IIb). More exotic
scenarios that predict the presence of a compact companion (white dwarf, neutron
star or black hole) are still possible as well as scenarios where the progenitor
of Cas A was single at the moment of explosion (either because it was truly single,
or resulted from a binary that was disrupted, or from a binary merger). The presence
of a compact companion would imply that Cas A is of interest to study exotic outcomes
of binary evolution. The single-at-death solution would still require fine-tuning
of the process that removed most of the envelope through a mass-loss mechanism
yet to be identified. We discuss how future constraints from Gaia and even deeper
photometric studies may help to place further constraints.
article_number: A34
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Wolfgang E.
full_name: Kerzendorf, Wolfgang E.
last_name: Kerzendorf
- first_name: Tuan
full_name: Do, Tuan
last_name: Do
- first_name: Selma E.
full_name: de Mink, Selma E.
last_name: de Mink
- first_name: Ylva Louise Linsdotter
full_name: Götberg, Ylva Louise Linsdotter
id: d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d
last_name: Götberg
orcid: 0000-0002-6960-6911
- first_name: Dan
full_name: Milisavljevic, Dan
last_name: Milisavljevic
- first_name: Emmanouil
full_name: Zapartas, Emmanouil
last_name: Zapartas
- first_name: Mathieu
full_name: Renzo, Mathieu
last_name: Renzo
- first_name: Stephen
full_name: Justham, Stephen
last_name: Justham
- first_name: Philipp
full_name: Podsiadlowski, Philipp
last_name: Podsiadlowski
- first_name: Robert A.
full_name: Fesen, Robert A.
last_name: Fesen
citation:
ama: Kerzendorf WE, Do T, de Mink SE, et al. No surviving non-compact stellar companion
to Cassiopeia A. Astronomy & Astrophysics. 2019;623. doi:10.1051/0004-6361/201732206
apa: Kerzendorf, W. E., Do, T., de Mink, S. E., Götberg, Y. L. L., Milisavljevic,
D., Zapartas, E., … Fesen, R. A. (2019). No surviving non-compact stellar companion
to Cassiopeia A. Astronomy & Astrophysics. EDP Sciences. https://doi.org/10.1051/0004-6361/201732206
chicago: Kerzendorf, Wolfgang E., Tuan Do, Selma E. de Mink, Ylva Louise Linsdotter
Götberg, Dan Milisavljevic, Emmanouil Zapartas, Mathieu Renzo, Stephen Justham,
Philipp Podsiadlowski, and Robert A. Fesen. “No Surviving Non-Compact Stellar
Companion to Cassiopeia A.” Astronomy & Astrophysics. EDP Sciences,
2019. https://doi.org/10.1051/0004-6361/201732206.
ieee: W. E. Kerzendorf et al., “No surviving non-compact stellar companion
to Cassiopeia A,” Astronomy & Astrophysics, vol. 623. EDP Sciences,
2019.
ista: Kerzendorf WE, Do T, de Mink SE, Götberg YLL, Milisavljevic D, Zapartas E,
Renzo M, Justham S, Podsiadlowski P, Fesen RA. 2019. No surviving non-compact
stellar companion to Cassiopeia A. Astronomy & Astrophysics. 623, A34.
mla: Kerzendorf, Wolfgang E., et al. “No Surviving Non-Compact Stellar Companion
to Cassiopeia A.” Astronomy & Astrophysics, vol. 623, A34, EDP Sciences,
2019, doi:10.1051/0004-6361/201732206.
short: W.E. Kerzendorf, T. Do, S.E. de Mink, Y.L.L. Götberg, D. Milisavljevic, E.
Zapartas, M. Renzo, S. Justham, P. Podsiadlowski, R.A. Fesen, Astronomy &
Astrophysics 623 (2019).
date_created: 2023-08-03T10:14:27Z
date_published: 2019-03-27T00:00:00Z
date_updated: 2023-08-09T12:28:17Z
day: '27'
doi: 10.1051/0004-6361/201732206
extern: '1'
external_id:
arxiv:
- '1711.00055'
intvolume: ' 623'
keyword:
- Space and Planetary Science
- Astronomy and Astrophysics
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1051/0004-6361/201732206
month: '03'
oa: 1
oa_version: Published Version
publication: Astronomy & Astrophysics
publication_identifier:
eissn:
- 1432-0746
issn:
- 0004-6361
publication_status: published
publisher: EDP Sciences
quality_controlled: '1'
scopus_import: '1'
status: public
title: No surviving non-compact stellar companion to Cassiopeia A
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 623
year: '2019'
...
---
_id: '138'
abstract:
- lang: eng
text: Autoregulation is the direct modulation of gene expression by the product
of the corresponding gene. Autoregulation of bacterial gene expression has been
mostly studied at the transcriptional level, when a protein acts as the cognate
transcriptional repressor. A recent study investigating dynamics of the bacterial
toxin–antitoxin MazEF system has shown how autoregulation at both the transcriptional
and post-transcriptional levels affects the heterogeneity of Escherichia coli
populations. Toxin–antitoxin systems hold a crucial but still elusive part in
bacterial response to stress. This perspective highlights how these modules can
also serve as a great model system for investigating basic concepts in gene regulation.
However, as the genomic background and environmental conditions substantially
influence toxin activation, it is important to study (auto)regulation of toxin–antitoxin
systems in well-defined setups as well as in conditions that resemble the environmental
niche.
article_processing_charge: Yes (via OA deal)
author:
- first_name: Nela
full_name: Nikolic, Nela
id: 42D9CABC-F248-11E8-B48F-1D18A9856A87
last_name: Nikolic
orcid: 0000-0001-9068-6090
citation:
ama: 'Nikolic N. Autoregulation of bacterial gene expression: lessons from the MazEF
toxin–antitoxin system. Current Genetics. 2019;65(1):133-138. doi:10.1007/s00294-018-0879-8'
apa: 'Nikolic, N. (2019). Autoregulation of bacterial gene expression: lessons from
the MazEF toxin–antitoxin system. Current Genetics. Springer. https://doi.org/10.1007/s00294-018-0879-8'
chicago: 'Nikolic, Nela. “Autoregulation of Bacterial Gene Expression: Lessons from
the MazEF Toxin–Antitoxin System.” Current Genetics. Springer, 2019. https://doi.org/10.1007/s00294-018-0879-8.'
ieee: 'N. Nikolic, “Autoregulation of bacterial gene expression: lessons from the
MazEF toxin–antitoxin system,” Current Genetics, vol. 65, no. 1. Springer,
pp. 133–138, 2019.'
ista: 'Nikolic N. 2019. Autoregulation of bacterial gene expression: lessons from
the MazEF toxin–antitoxin system. Current Genetics. 65(1), 133–138.'
mla: 'Nikolic, Nela. “Autoregulation of Bacterial Gene Expression: Lessons from
the MazEF Toxin–Antitoxin System.” Current Genetics, vol. 65, no. 1, Springer,
2019, pp. 133–38, doi:10.1007/s00294-018-0879-8.'
short: N. Nikolic, Current Genetics 65 (2019) 133–138.
date_created: 2018-12-11T11:44:50Z
date_published: 2019-02-01T00:00:00Z
date_updated: 2025-04-15T06:50:19Z
day: '01'
ddc:
- '570'
department:
- _id: CaGu
doi: 10.1007/s00294-018-0879-8
ec_funded: 1
external_id:
isi:
- '000456958800017'
file:
- access_level: open_access
checksum: 6779708b0b632a1a6ed28c56f5161142
content_type: application/pdf
creator: dernst
date_created: 2019-02-06T07:50:58Z
date_updated: 2020-07-14T12:44:47Z
file_id: '5930'
file_name: 2019_CurrentGenetics_Nikolic.pdf
file_size: 776399
relation: main_file
file_date_updated: 2020-07-14T12:44:47Z
has_accepted_license: '1'
intvolume: ' 65'
isi: 1
issue: '1'
language:
- iso: eng
month: '02'
oa: 1
oa_version: Published Version
page: 133-138
project:
- _id: 25681D80-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '291734'
name: International IST Postdoc Fellowship Programme
publication: Current Genetics
publication_status: published
publisher: Springer
publist_id: '7785'
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Autoregulation of bacterial gene expression: lessons from the MazEF toxin–antitoxin
system'
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 65
year: '2019'
...