@article{3055, abstract = {ACAP-type ARF GTPase activating proteins (ARF-GAPs) regulate multiple cellular processes, including endocytosis, secretion, phagocytosis, cell adhesion and cell migration. However, the regulation of ACAP functions by other cellular proteins is poorly understood. We have reported previously that a plant ACAP, VAN3, plays a pivotal role in plant venation continuity. Here, we report on newly identified VAN3 regulators: the CVP2 (cotyledon vascular pattern 2) 5 PTase, which is considered to degrade IP3 and also to produce PtdIns(4)P from PtdIns(4,5)P2; and a PH domain-containing protein, VAB (VAN3 binding protein). Combinational mutations of both CVP2 and its closest homologue CVL1 (CVP2 like 1) phenocopied the strong allele of van3 mutants, showing severe vascular continuity. The phenotype of double mutants between van3, cvp2 and vab suggested that VAN3, CVP2 and VAB function in vascular pattern formation in the same pathway. Localization analysis revealed that both CVP2 and VAB colocalize with VAN3 in the trans- Golgi network (TGN), supporting their functions in the same pathway. The subcellular localization of VAN3 was dependent on its PH domain, and mislocalization of VAN3 was induced in cvp2 or vab mutants. These results suggest that CVP2 and VAB cooperatively regulate the subcellular localization of VAN3 through the interaction between its PH domain and phosphoinositides and/or inositol phosphates. In addition, PtdIns(4)P, to which VAN3 binds preferentially, enhanced the ARF-GAP activity of VAN3, whereas IP3 inhibited it. These results suggest the existence of PtdIns(4)P and/or IP3-dependent subcellular targeting and regulation of VAN3 ACAP activity that governs plant vascular tissue continuity.}, author = {Naramoto, Satoshi and Sawa, Shinichiro and Koizumi, Koji and Uemura, Tomohiro and Ueda, Takashi and Jirí Friml and Nakano, Akihiko and Fukuda, Hiroo}, journal = {Development}, number = {9}, pages = {1529 -- 1538}, publisher = {Company of Biologists}, title = {{Phosphoinositide-dependent regulation of VAN3 ARF-GAP localization and activity essential for vascular tissue continuity in plants}}, doi = {10.1242/dev.030098}, volume = {136}, year = {2009}, } @article{3056, abstract = {Local hormone maxima are essential for the development of multicellular structures and organs. For example, steroid hormones accumulate in specific cell types of the animal fetus to induce sexual differentiation and concentration peaks of the plant hormone auxin direct organ initiation and mediate tissue patterning. Here we provide an example of a regulated local hormone minimum required during organogenesis. Our results demonstrate that formation of a local auxin minimum is necessary for specification of the valve margin separation layer where Arabidopsis fruit opening takes place. Consequently, ectopic production of auxin, specifically in valve margin cells, leads to a complete loss of proper cell fate determination. The valve margin identity factor INDEHISCENT (IND) is responsible for forming the auxin minimum by coordinating auxin efflux in separation-layer cells. We propose that the simplicity of formation and maintenance make local hormone minima particularly well suited to specify a small number of cells such as the stripes at the valve margins.}, author = {Sorefan, Karim and Girin, Thomas and Liljegren, Sarah J and Ljung, Karin and Robles, Pedro and Galván-Ampudia, Carlos S and Offringa, Remko and Jirí Friml and Yanofsky, Martin F and Østergaard, Lars}, journal = {Nature}, number = {7246}, pages = {583 -- 586}, publisher = {Nature Publishing Group}, title = {{A regulated auxin minimum is required for seed dispersal in Arabidopsis}}, doi = {10.1038/nature07875}, volume = {459}, year = {2009}, } @article{3057, abstract = {The differential distribution of the plant signaling molecule auxin is required for many aspects of plant development. Local auxin maxima and gradients arise as a result of local auxin metabolism and, predominantly, from directional cell-to-cell transport. In this primer, we discuss how the coordinated activity of several auxin influx and efflux systems, which transport auxin across the plasma membrane, mediates directional auxin flow. This activity crucially contributes to the correct setting of developmental cues in embryogenesis, organogenesis, vascular tissue formation and directional growth in response to environmental stimuli.}, author = {Petrášek, Jan and Friml, Jirí}, journal = {Development}, number = {16}, pages = {2675 -- 2688}, publisher = {Company of Biologists}, title = {{Auxin transport routes in plant development}}, doi = {10.1242/dev.030353}, volume = {136}, year = {2009}, } @article{3058, abstract = {The plant signalling molecule auxin provides positional informa-tion in a variety of developmental processes by means of its differential distribution (gradients) within plant tissues. Thus, cellular auxin levels often determine the developmental output of auxin signalling. Conceptually, transmembrane transport and metabolic processes regulate the steady-state levels of auxin in any given cell2,3. In particular, PIN auxin-efflux-carrier-mediated, directional transport between cells is crucial for generating auxin gradients2,4,5. Here we show that Arabidopsis thaliana PIN5, an atypical member of the PIN gene family, encodes a functional auxin transporter that is required for auxin-mediated develop-ment. PIN5 does not have a direct role in cell-to-cell transport but regulates intracellular auxin homeostasis and metabolism. PIN5 localizes, unlike other characterized plasma membrane PIN proteins, to endoplasmic reticulum (ER), presumably medi-ating auxin flow from the cytosol to the lumen of the ER. The ER localization of other PIN5-like transporters (including the moss PIN) indicates that the diversification of PIN protein functions in mediating auxin homeostasis at the ER, and cell-to-cell auxin transport at the plasma membrane, represent an ancient event during the evolution of land plants.}, author = {Mravec, Jozef and Skůpa, Petr and Bailly, Aurélien and Hoyerová, Klára and Křeček, Pavel and Bielach, Agnieszka and Petrášek, Jan and Zhang, Jing and Gaykova, Vassilena and Stierhof, York-Dieter and Dobrev, Petre I and Schwarzerová, Kateřina and Rolčík, Jakub and Seifertová, Daniela and Luschnig, Christian and Eva Benková and Zažímalová, Eva and Geisler, Markus and Jirí Friml}, journal = {Nature}, number = {7250}, pages = {1136 -- 1140}, publisher = {Nature Publishing Group}, title = {{Subcellular homeostasis of phytohormone auxin is mediated by the ER localized PIN5 transporter}}, doi = {10.1038/nature08066}, volume = {459}, year = {2009}, } @article{3059, abstract = {The phytohormone auxin plays a major role in embryonic and postembryonic plant development. The temporal and spatial distribution of auxin largely depends on the subcellular polar localization of members of the PIN-FORMED (PIN) auxin efflux carrier family. The Ser/Thr protein kinase PINOID (PID) catalyzes PIN phosphorylation and crucially contributes to the regulation of apical-basal PIN polarity. The GTP exchange factor on ADP-ribosylation factors (ARF-GEF), GNOM preferentially mediates PIN recycling at the basal side of the cell. Interference with GNOM activity leads to dynamic PIN transcytosis between different sides of the cell. Our genetic, pharmacological, and cell biological approaches illustrate that PID and GNOM influence PIN polarity and plant development in an antagonistic manner and that the PID-dependent PIN phosphorylation results in GNOM-independent polar PIN targeting. The data suggest that PID and the protein phosphatase 2A not only regulate the static PIN polarity, but also act antagonistically on the rate of GNOM-dependent polar PIN transcytosis. We propose a model that includes PID-dependent PIN phosphorylation at the plasma membrane and the subsequent sorting of PIN proteins to a GNOM-independent pathway for polarity alterations during developmental processes, such as lateral root formation and leaf vasculature development.}, author = {Kleine-Vehn, Jürgen and Huang, Fang and Naramoto, Satoshi and Zhang, Jing and Michniewicz, Marta and Offringa, Remko and Jirí Friml}, journal = {Plant Cell}, number = {12}, pages = {3839 -- 3849}, publisher = {American Society of Plant Biologists}, title = {{PIN auxin efflux carrier polarity is regulated by PINOID kinase mediated recruitment into GNOM independent trafficking in arabidopsis}}, doi = {10.1105/tpc.109.071639}, volume = {21}, year = {2009}, } @article{3060, author = {Schumacher, Karin and Friml, Jirí}, journal = {Current Opinion in Plant Biology}, number = {6}, pages = {651 -- 652}, publisher = {Elsevier}, title = {{Cell biology}}, doi = {10.1016/j.pbi.2009.10.009}, volume = {12}, year = {2009}, } @article{3061, abstract = {The PIN-FORMED (PIN) proteins are secondary transporters acting in the efflux of the plant signal molecule auxin from cells. They are asymmetrically localized within cells and their polarity determines the directionality of intercellular auxin flow. PIN genes are found exclusively in the genomes of multicellular plants and play an important role in regulating asymmetric auxin distribution in multiple developmental processes, including embryogenesis, organogenesis, tissue differentiation and tropic responses. All PIN proteins have a similar structure with amino- and carboxy-terminal hydrophobic, membrane-spanning domains separated by a central hydrophilic domain. The structure of the hydrophobic domains is well conserved. The hydrophilic domain is more divergent and it determines eight groups within the protein family. The activity of PIN proteins is regulated at multiple levels, including transcription, protein stability, subcellular localization and transport activity. Different endogenous and environmental signals can modulate PIN activity and thus modulate auxin-distribution-dependent development. A large group of PIN proteins, including the most ancient members known from mosses, localize to the endoplasmic reticulum and they regulate the subcellular compartmentalization of auxin and thus auxin metabolism. Further work is needed to establish the physiological importance of this unexpected mode of auxin homeostasis regulation. Furthermore, the evolution of PIN-based transport, PIN protein structure and more detailed biochemical characterization of the transport function are important topics for further studies.}, author = {Křeček, Pavel and Skůpa, Petr and Libus, Jiří and Naramoto, Satoshi and Tejos, Ricardo and Friml, Jirí and Zažímalová, Eva}, journal = {Genome Biology}, number = {12}, publisher = {BioMed Central}, title = {{The PIN-FORMED (PIN) protein family of auxin transporters}}, doi = {10.1186/gb-2009-10-12-249}, volume = {10}, year = {2009}, } @article{12654, abstract = {We investigate the transferability of an enhanced temperature-index melt model that was developed and tested on Haut Glacier d’Arolla, Switzerland, in the 2001 season. The model’s empirical parameters (temperature factor, TF, and shortwave radiation factor, SRF) are recalibrated for: (1) other locations on Haut Glacier d’Arolla; (2) subperiods of distinct meteorological conditions; (3) different years on Haut Glacier d’Arolla; and (4) other glaciers in different years. The model parameters are optimized against simulations of an energy-balance model validated against ablation observations. Results are compared with those obtained with the original parameters. The model works very well when applied to other sites, seasons and glaciers, with the exception of overcast conditions. Differences are due to underestimation of high melt rates. The parameter values are associated with the prevailing energy-balance conditions, showing that high SRF are obtained on clear-sky days, whereas higher TF are typical of locations where glacier winds prevail and turbulent fluxes are high. We also provide a range of parameters clearly associated with the site’s location and its meteorological characteristics that could help to assign parameter values to sites where few data are available.}, author = {Carenzo, Marco and Pellicciotti, Francesca and Rimkus, Stefan and Burlando, Paolo}, issn = {1727-5652}, journal = {Journal of Glaciology}, number = {190}, pages = {258--274}, publisher = {Cambridge University Press}, title = {{Assessing the transferability and robustness of an enhanced temperature-index glacier-melt model}}, doi = {10.3189/002214309788608804}, volume = {55}, year = {2009}, } @article{12655, abstract = {We discuss the inclusion of the subsurface heat-conduction flux into the calculation of the energy balance and ablation at the glacier–atmosphere interface. Data from automatic weather stations are used to force an energy-balance model at several locations on alpine glaciers and at one site in the dry Andes of central Chile. The heat-conduction flux is computed using a two-layer scheme, assuming that 36% of the net shortwave radiation is absorbed by the surface layer and that the rest penetrates into the snowpack. We compare simulations conducted with and without subsurface heat flux. Results show that assuming a surface temperature of zero degrees leads to a larger overestimation of melt at the sites in the accumulation area (10.4–13.3%) than in the ablation area (0.5–2.8%), due to lower air temperatures and the presence of snow. The difference between simulations with and without heat conduction is also high at the beginning and end of the ablation season (up to 29% for the first 15 days of the season), when air temperatures are lower and snow covers the glacier surface, while they are of little importance during periods of sustained melt at all the locations investigated.}, author = {Pellicciotti, Francesca and Carenzo, Marco and Helbing, Jakob and Rimkus, Stefan and Burlando, Paolo}, issn = {1727-5644}, journal = {Annals of Glaciology}, number = {50}, pages = {16--24}, publisher = {International Glaciological Society}, title = {{On the role of subsurface heat conduction in glacier energy-balance modelling}}, doi = {10.3189/172756409787769555}, volume = {50}, year = {2009}, } @article{1302, abstract = {The nervous system of seeing animals derives information about optic flow in two subsequent steps. First, local motion vectors are calculated from moving retinal images, and second, the spatial distribution of these vectors is analyzed on the dendrites of large downstream neurons. In dipteran flies, this second step relies on a set of motion-sensitive lobula plate tangential cells (LPTCs), which have been studied in great detail in large fly species. Yet, studies on neurons that convey information to LPTCs and neuroanatomical investigations that enable a mechanistic understanding of the underlying dendritic computations in LPTCs are rare. We investigated the subcellular distribution of nicotinic acetylcholine receptors (nAChRs) on two sets of LPTCs: vertical system (VS) and horizontal system (HS) cells in Drosophila melanogaster. In this paper, we describe that both cell types express Dα7-type nAChR subunits specifically on higher order dendritic branches, similar to the expression of gamma aminobutyric acid (GABA) receptors. These findings support a model in which directional selectivity of LPTCs is achieved by the dendritic integration of excitatory, cholinergic, and inhibitory GABA-ergic input from local motion detectors with opposite preferred direction. Nonetheless, whole-cell recordings in mutant flies without Dα7 nAChRs revealed that direction selectivity of VS and HS cells is largely retained. In addition, mutant LPTCs were responsive to acetylcholine and remaining nAChR receptors were labeled by α-bungarotoxin. These results in LPTCs with genetically manipulated excitatory input synapses suggest a robust cellular implementation of dendritic processing that warrants direction selectivity. The underlying mechanism that ensures appropriate nAChR-mediated synaptic currents and the functional implications of separate sets or heteromultimeric nAChRs can now be addressed in this system.}, author = {Raghu, Shamprasad V and Maximilian Jösch and Sigrist, Stephan J and Borst, Alexander and Reiff, Dierk F}, journal = {Journal of Neurogenetics}, number = {1-2}, pages = {200 -- 209}, publisher = {Informa Healthcare}, title = {{Synaptic organization of lobula plate tangential cells in Drosophila: Dα7 cholinergic receptors}}, doi = {10.1080/01677060802471684}, volume = {23}, year = {2009}, } @inproceedings{2094, abstract = {This paper introduces a data-driven representation and modeling technique for simulating non-linear heterogeneous soft tissue. It simplifies the construction of convincing deformable models by avoiding complex selection and tuning of physical material parameters, yet retaining the richness of non-linear heterogeneous behavior. We acquire a set of example deformations of a real object, and represent each of them as a spatially varying stress-strain relationship in a finite-element model. We then model the material by non-linear interpolation of these stress-strain relationships in strain-space. Our method relies on a simple-to-build capture system and an efficient run-time simulation algorithm based on incremental loading, making it suitable for interactive computer graphics applications. We present the results of our approach for several non-linear materials and biological soft tissue, with accurate agreement of our model to the measured data. }, author = {Bernd Bickel and Bac̈her, Moritz and Otaduy, Miguel A and Matusik, Wojciech and Pfister, Hanspeter and Groß, Markus S}, number = {3}, publisher = {ACM}, title = {{Capture and modeling of non-linear heterogeneous soft tissue}}, doi = {10.1145/1576246.1531395 }, volume = {28}, year = {2009}, } @article{21150, abstract = {The crystal structure of d(CACACG)·d(CGTGTG) was solved to a resolution of 2.05 Å in space group P21. The duplex assumes the left-handed Z-DNA structure. The presence of two A·T base pairs in the hexamer does not greatly affect the conformation. The most significant changes compared with the regular structure of Z-DNA are in the values of twist in the central portion of the helix. This variation, as well as others in the values of roll, inclination etc., follow the pattern observed previously in the structure of d(CGCACG)·d(CGTGCG).}, author = {Venkadesh, S. and Mandal, Pradeep K and Gautham, N.}, issn = {1744-3091}, journal = {Acta Crystallographica Section F Structural Biology Communications}, number = {1}, pages = {8--13}, publisher = {International Union of Crystallography}, title = {{The structure of d(CACACG)·d(CGTGTG)}}, doi = {10.1107/s1744309108037706}, volume = {65}, year = {2009}, } @article{2119, abstract = {Let (E, H, μ) be an abstract Wiener space and let DV : = V D, where D denotes the Malliavin derivative and V is a closed and densely defined operator from H into another Hilbert space under(H, {combining low line}). Given a bounded operator B on under(H, {combining low line}), coercive on the range over(R (V), -), we consider the operators A : = V* B V in H and under(A, {combining low line}) : = V V* B in under(H, {combining low line}), as well as the realisations of the operators L : = DV* B DV and under(L, {combining low line}) : = DV DV* B in Lp (E, μ) and Lp (E, μ ; under(H, {combining low line})) respectively, where 1 < p < ∞. Our main result asserts that the following four assertions are equivalent: (1)D (sqrt(L)) = D (DV) with {norm of matrix} sqrt(L) f {norm of matrix}p {minus tilde} {norm of matrix} DV f {norm of matrix}p for f ∈ D (sqrt(L));(2)under(L, {combining low line}) admits a bounded H∞-functional calculus on over(R (DV), -);(3)D (sqrt(A)) = D (V) with {norm of matrix} sqrt(A) h {norm of matrix} {minus tilde} {norm of matrix} V h {norm of matrix} for h ∈ D (sqrt(A));(4)under(A, {combining low line}) admits a bounded H∞-functional calculus on over(R (V), -). Moreover, if these conditions are satisfied, then D (L) = D (DV2) ∩ D (DA). The equivalence (1)-(4) is a non-symmetric generalisation of the classical Meyer inequalities of Malliavin calculus (where under(H, {combining low line}) = H, V = I, B = frac(1, 2) I). A one-sided version of (1)-(4), giving Lp-boundedness of the Riesz transform DV / sqrt(L) in terms of a square function estimate, is also obtained. As an application let -A generate an analytic C0-contraction semigroup on a Hilbert space H and let -L be the Lp-realisation of the generator of its second quantisation. Our results imply that two-sided bounds for the Riesz transform of L are equivalent with the Kato square root property for A. The boundedness of the Riesz transform is used to obtain an Lp-domain characterisation for the operator L.}, author = {Jan Maas and van Neerven, Jan M}, journal = {Journal of Functional Analysis}, number = {8}, pages = {2410 -- 2475}, publisher = {Academic Press}, title = {{Boundedness of Riesz transforms for elliptic operators on abstract Wiener spaces}}, doi = {10.1016/j.jfa.2009.07.001}, volume = {257}, year = {2009}, } @inproceedings{2136, abstract = {The local atomic structure of PbTiO3, BaTiO3, and KNbO3 perovskite-type crystals and K x Na1 − x NbO3 solid solutions in different phases is investigated using the angular dependence of the pre-edge structure of the Ti and Nb K X-ray absorption spectra and the EXAFS data. In noncubic phases, a considerable deviation of the local structure from the structure determined from diffraction data is observed only for the tetragonal phase of the BaTiO3 crystal. It is revealed that, in the cubic phase of niobates, the niobium atoms are characterized by significant displacements from the centrosymmetric positions along the threefold axes, so that they are close in the magnitude and the direction to the displacements in the low-temperatures rhombohedral phases.}, author = {Vedrinskiǐ, Rostislav V and Kraǐzman, V. L and Mikhail Lemeshko and Nazarenko, Elena S and Novakovich, Alexander A and Reznichenko, Larisa A and Fokin, Vladimir N and Shuvaeva, Victoria A}, number = {7}, pages = {1394 -- 1398}, publisher = {Springer}, title = {{Local atomic structure of niobates and titanates from X-ray absorption spectroscopic data}}, doi = {10.1134/S106378340907018X}, volume = {51}, year = {2009}, } @article{2137, abstract = {Relying on the quantization rule of Raab and Friedrich [Phys. Rev. A (2009) in press], we derive simple and accurate formulae for the number of rotational states supported by a weakly bound vibrational level of a diatomic molecular ion. We also provide analytic estimates of the rotational constants of any such levels up to threshold for dissociation and obtain a criterion for determining whether a given weakly bound vibrational level is rotationless. The results depend solely on the long-range part of the molecular potential.}, author = {Mikhail Lemeshko and Frierich, Bretislav}, journal = {Journal of Atomic and Molecular Sciences}, number = {1}, pages = {41 -- 47}, publisher = {Global Science Press}, title = {{Rotational structure of weakly bound molecular ions}}, doi = {10.4208/jams.101009.110209a}, volume = {1}, year = {2009}, } @article{2149, abstract = {We investigate the effects of a magnetic field on the dynamics of rotationally inelastic collisions of open-shell molecules (Σ2, Σ3, and Π2) with closed-shell atoms. Our treatment makes use of the Fraunhofer model of matter wave scattering and its recent extension to collisions in electric [M. Lemeshko and B. Friedrich, J. Chem. Phys. 129, 024301 (2008)] and radiative fields [M. Lemeshko and B. Friedrich, Int. J. Mass. Spec. 280, 19 (2009)]. A magnetic field aligns the molecule in the space-fixed frame and thereby alters the effective shape of the diffraction target. This significantly affects the differential and integral scattering cross sections. We exemplify our treatment by evaluating the magnetic-field-dependent scattering characteristics of the He-CaH (XΣ+2), He-O2 (XΣ–3), and He-OH (XΠΩ2) systems at thermal collision energies. Since the cross sections can be obtained for different orientations of the magnetic field with respect to the relative velocity vector, the model also offers predictions about the frontal-versus-lateral steric asymmetry of the collisions. The steric asymmetry is found to be almost negligible for the He-OH system, weak for the He-CaH collisions, and strong for the He-O2. While odd ΔM transitions dominate the He-OH [J=3/2,f→J′,e/f] integral cross sections in a magnetic field parallel to the relative velocity vector, even ΔM transitions prevail in the case of the He-CaH (X2Σ+) and He-O2 (XΣ−3) collision systems. For the latter system, the magnetic field opens inelastic channels that are closed in the absence of the field. These involve the transitions N=1,J=0→N′, J′ with J′=N′.}, author = {Mikhail Lemeshko and Friedrich, Břetislav}, journal = {Physical Review A - Atomic, Molecular, and Optical Physics}, number = {1}, publisher = {American Physical Society}, title = {{Collisions of paramagnetic molecules in magnetic fields: An analytic model based on Fraunhofer diffraction of matter waves}}, doi = {10.1103/PhysRevA.79.012718}, volume = {79}, year = {2009}, } @article{2150, abstract = {We examine the effects of a linearly polarized nonresonant radiative field on the dynamics of rotationally inelastic Na+ + N2 collisions at eV collision energies. Our treatment is based on the Fraunhofer model of matter wave scattering and its recent extension to collisions in electric fields [M. Lemeshko, B. Friedrich, J. Chem. Phys. 129 (2008) 024301]. The nonresonant radiative field changes the effective shape of the target molecule by aligning it in the space-fixed frame. This markedly alters the differential and integral scattering cross-sections. As the cross-sections can be evaluated for a polarization of the radiative field collinear or perpendicular to the relative velocity vector, the model also offers predictions about steric asymmetry of the collisions.}, author = {Mikhail Lemeshko and Friedrich, Břetislav}, journal = {International Journal of Mass Spectrometry}, number = {1-3}, pages = {19 -- 25}, publisher = {Elsevier}, title = {{The effect of a nonresonant radiative field on low-energy rotationally inelastic Na+ + N2 collisions}}, doi = {10.1016/j.ijms.2008.06.010 }, volume = {280}, year = {2009}, } @article{21513, abstract = {Numerical modelling of the deformation of a polymer using the finite elements method in axisymetrical mode was performed using the LsDyna® software to describe the filling of micro-cavities during the forming process of the material using the hot embossing. These simulations firstly allow verifying whether the chosen forming process conditions promote or not an optimized filling of the superficial cavities in order to achieve precise replicas which best reproduce the superficial topography of the mould. The simulations were carried out to evaluate the filling of the cavities taking into account the mechanical behaviour of the selected polymer into the model. Moreover, these models were developed to verify the effect of the distribution of the mould cavities on their filling. The influence of the mobility of non deformable rigid plates on the filling of the cavities represents an auxiliary variable. In the approach presented, the compression plates are assumed to be parallel and non deformable, whereas the polymer disk follows a rubbery behaviour around a temperature equal to 140°C. Globally the modelling results are satisfactory for they are rather close to the experimental observations conducted. In summary, the effect of the normal stress as also the distribution of micro-cavities at the mould surface seem to prevail in the case of the forming process by hot embossing.}, author = {Sahli, Mohamed and Millot, Christine and Roques-Carmes, Charles and Khan Malek, Chantal}, issn = {1432-1858}, journal = {Microsystem Technologies}, number = {6}, pages = {827--835}, publisher = {Springer Nature}, title = {{Experimental analysis and numerical modelling of the forming process of polypropylene replicas of micro-cavities using hot embossing}}, doi = {10.1007/s00542-009-0813-6}, volume = {15}, year = {2009}, } @article{21514, abstract = {This paper describes observations and metrological analyses made to compare the replication quality of polymeric replicas obtained by filling micro-cavities using both hot embossing and micro-injection moulding processes. The experiments are performed with polypropylene (PP) at a constant melt temperature and a constant mould temperature, whereas hot embossing tests are carried out with the same polymer at temperatures close to the softening one. The results concerning the micro-cavities filling provide information on the reliability about the possibilities of replication topographical surface geometries. The data obtained by scanning mechanical microscopy (SMM) are used to determine the comparative filling ratio values.}, author = {Sahli, M. and Millot, C. and Roques-Carmes, Charles and Khan Malek, C. and Barriere, T. and Gelin, J.C.}, issn = {1873-4774}, journal = {Journal of Materials Processing Technology}, keywords = {Hot embossing, Micro-injection moulding, Micro-cavities replication, Polypropylene polymer, Scanning mechanical microscopy, Roughness parameters}, number = {18-19}, pages = {5851--5861}, publisher = {Elsevier}, title = {{Quality assessment of polymer replication by hot embossing and micro-injection moulding processes using scanning mechanical microscopy}}, doi = {10.1016/j.jmatprotec.2009.06.011}, volume = {209}, year = {2009}, } @article{2191, abstract = {By making use of the quantization rule of Raab and Friedrich [Phys. Rev. A 78, 022707 (2008)], we derive simple and accurate formulae for the number of rotational states supported by a weakly bound vibrational level of a diatomic molecule and the rotational constants of any such levels up to the threshold, and provide a criterion for determining whether a given weakly bound vibrational level is rotationless. The results depend solely on the long-range part of the molecular potential and are applicable to halo molecules. }, author = {Mikhail Lemeshko and Friedrich, Břetislav}, journal = {Physical Review A - Atomic, Molecular, and Optical Physics}, number = {5}, publisher = {American Physical Society}, title = {{Rotational and rotationless states of weakly bound molecules}}, doi = {10.1103/PhysRevA.79.050501}, volume = {79}, year = {2009}, }