--- _id: '4297' abstract: - lang: eng text: The F5 (2n = 34) and FM2 (2n = 44-46) chromosome races of the Sceloporus grammicus complex form a parapatric hybrid zone in the Mexican state of Hidalgo, characterized by steep concordant clines among three diagnostic chromosome markers across a straight-line distance of about 2 km. Here, we show that this zone is actually structured into local patches in which hybridization extends over an extremely irregular front. The distribution of hybrid-index (HI) scores across the transect reveals some hybridization at almost all localities mapped in a central 7 km x 3 km area. Pooling the central samples produces both a strong heterozygote deficit for all diagnostic markers and strong linkage disequilibria between all pairwise combinations of these (unlinked) markers. Moreover, a highly significant association exists between the habitat on which each individual was caught and its karyotype (F5 chromosomes are more likely to be found on oak). Analysis of genotype frequencies over a range of spatial scales shows that there is no significant heterozygote deficit or habitat association within local areas of less than about 200 m; however, there is significant linkage disequilibrium over the smallest scales (R = D (pquv)1/2 = 0.29, support limits, 0.18-0.36) over 100 m. These patterns suggest that lizards mate and choose habitats randomly within local patches. This conclusion is supported by mark-recapture estimates of dispersal (≈ 80 m in a generation) and by inference of matings from embryo and maternal karyotypes. Closer examination of the two-dimensional pattern reveals a convoluted cline for all three markers, with a width of 830 m (support limits 770 m-930 m). This cline width, combined with the strength of local linkage disequilibrium, implies a dispersal rate of σ = 160 m in a generation and an effective selection pressure of 30% on each chromosome marker. The proportion of inviable embryos is greater in females from the center of the hybrid zone; this is caused by effects associated with both karyotype and location. The hybrid zone is likely to be maintained by selection against chromosomal heterozygotes, by other kinds of selection against hybrids, and by selection adapting the chromosome races to different habitats. The structure of the contact may be caused by both random drift and by selection in relation to habitat. acknowledgement: For field assistance in collecting and mapping of the zone, we thank E. Arevalo, I. Goyenechea, D. Hutchison, M. Man- cilia, F. Mendoza, D. Mink, and J. and H. Sites. The mark- recapture work was carried out by M. Mancilla, F Mendoza, and A. Gonzales. J.W.S. also thanks T. Hinckley and D. Ste­vens of the Brigham Young University Department of Ge­ography for lessons in surveying and map making and use of the field equipment and planimeter. B. Nürnberger pro­vided the digitized coordinates for individual lizards and as­sisted with the analysis of spatial structure and viability. B. Nürnberger, C. MacCallum, J. Mallet, and J. Searle also pro­vided helpful comments on the manuscript. This work was supported by National Science Foundation grants BSR 85- 09092 and 88-22751 to J.W.S., and grants from the Science and Engineering Research Council (GR/H09929) and Natural Environment Research Council (GR3/8002) and the DarwinTrust to N.H.B. The Mexican agency Secretaria de DesarrolloUrbano y Ecologia (now Secretaria de Desarrollo Social) kindly provided scientific collecting permits (to E. Arévalo) for field work in 1989 and 1991. article_processing_charge: No article_type: original author: - first_name: Jack full_name: Sites, Jack last_name: Sites - first_name: Nicholas H full_name: Barton, Nicholas H id: 4880FE40-F248-11E8-B48F-1D18A9856A87 last_name: Barton orcid: 0000-0002-8548-5240 - first_name: Kent full_name: Reed, Kent last_name: Reed citation: ama: Sites J, Barton NH, Reed K. The genetic structure of a mosaic hybrid zone between two chromosome races of the Sceloporus grammicus complex (Sauria, Phrynosomatidae) in central Mexico. Evolution. 1995;49(1):9-36. doi:10.1111/j.1558-5646.1995.tb05955.x apa: Sites, J., Barton, N. H., & Reed, K. (1995). The genetic structure of a mosaic hybrid zone between two chromosome races of the Sceloporus grammicus complex (Sauria, Phrynosomatidae) in central Mexico. Evolution. Wiley-Blackwell. https://doi.org/10.1111/j.1558-5646.1995.tb05955.x chicago: Sites, Jack, Nicholas H Barton, and Kent Reed. “The Genetic Structure of a Mosaic Hybrid Zone between Two Chromosome Races of the Sceloporus Grammicus Complex (Sauria, Phrynosomatidae) in Central Mexico.” Evolution. Wiley-Blackwell, 1995. https://doi.org/10.1111/j.1558-5646.1995.tb05955.x. ieee: J. Sites, N. H. Barton, and K. Reed, “The genetic structure of a mosaic hybrid zone between two chromosome races of the Sceloporus grammicus complex (Sauria, Phrynosomatidae) in central Mexico,” Evolution, vol. 49, no. 1. Wiley-Blackwell, pp. 9–36, 1995. ista: Sites J, Barton NH, Reed K. 1995. The genetic structure of a mosaic hybrid zone between two chromosome races of the Sceloporus grammicus complex (Sauria, Phrynosomatidae) in central Mexico. Evolution. 49(1), 9–36. mla: Sites, Jack, et al. “The Genetic Structure of a Mosaic Hybrid Zone between Two Chromosome Races of the Sceloporus Grammicus Complex (Sauria, Phrynosomatidae) in Central Mexico.” Evolution, vol. 49, no. 1, Wiley-Blackwell, 1995, pp. 9–36, doi:10.1111/j.1558-5646.1995.tb05955.x. short: J. Sites, N.H. Barton, K. Reed, Evolution 49 (1995) 9–36. date_created: 2018-12-11T12:08:06Z date_published: 1995-02-01T00:00:00Z date_updated: 2022-06-13T09:24:40Z day: '01' doi: 10.1111/j.1558-5646.1995.tb05955.x extern: '1' external_id: pmid: - '28593667' intvolume: ' 49' issue: '1' language: - iso: eng main_file_link: - open_access: '1' url: https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1558-5646.1995.tb05955.x month: '02' oa: 1 oa_version: Published Version page: 9 - 36 pmid: 1 publication: Evolution publication_identifier: issn: - 0014-3820 publication_status: published publisher: Wiley-Blackwell publist_id: '1779' quality_controlled: '1' scopus_import: '1' status: public title: The genetic structure of a mosaic hybrid zone between two chromosome races of the Sceloporus grammicus complex (Sauria, Phrynosomatidae) in central Mexico type: journal_article user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17 volume: 49 year: '1995' ... --- _id: '4298' article_processing_charge: No article_type: original author: - first_name: Nicholas H full_name: Barton, Nicholas H id: 4880FE40-F248-11E8-B48F-1D18A9856A87 last_name: Barton orcid: 0000-0002-8548-5240 citation: ama: Barton NH. Appendix to “A simulation study of multilocus clines” by S J E Baird. Evolution. 1995;49(6):1038-1045. doi:10.1111/j.1558-5646.1995.tb04431.x apa: Barton, N. H. (1995). Appendix to “A simulation study of multilocus clines” by S J E Baird. Evolution. Wiley. https://doi.org/10.1111/j.1558-5646.1995.tb04431.x chicago: Barton, Nicholas H. “Appendix to ‘A Simulation Study of Multilocus Clines’ by S J E Baird.” Evolution. Wiley, 1995. https://doi.org/10.1111/j.1558-5646.1995.tb04431.x. ieee: N. H. Barton, “Appendix to ‘A simulation study of multilocus clines’ by S J E Baird,” Evolution, vol. 49, no. 6. Wiley, pp. 1038–1045, 1995. ista: Barton NH. 1995. Appendix to ‘A simulation study of multilocus clines’ by S J E Baird. Evolution. 49(6), 1038–1045. mla: Barton, Nicholas H. “Appendix to ‘A Simulation Study of Multilocus Clines’ by S J E Baird.” Evolution, vol. 49, no. 6, Wiley, 1995, pp. 1038–45, doi:10.1111/j.1558-5646.1995.tb04431.x. short: N.H. Barton, Evolution 49 (1995) 1038–1045. date_created: 2018-12-11T12:08:07Z date_published: 1995-12-01T00:00:00Z date_updated: 2022-06-28T07:47:30Z day: '01' doi: 10.1111/j.1558-5646.1995.tb04431.x extern: '1' intvolume: ' 49' issue: '6' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1111/j.1558-5646.1995.tb04431.x month: '12' oa: 1 oa_version: Published Version page: 1038 - 1045 publication: Evolution publication_identifier: issn: - 1558-5646 publication_status: published publisher: Wiley publist_id: '1773' quality_controlled: '1' status: public title: Appendix to "A simulation study of multilocus clines" by S J E Baird type: journal_article user_id: ea97e931-d5af-11eb-85d4-e6957dddbf17 volume: 49 year: '1995' ... --- OA_type: closed access _id: '18048' abstract: - lang: eng text: Studies of 2-D atomic hydrogen at high densities on helium surfaces have been plagued by the heating of the surfaces due to recombination, which dissipates more than 52, 000K for each recombining pair of atoms in the cell. When hydrogen recombines on a surface, it deposits less than 4% of its energy at the point of recombination and the rest is carried off by the excited molecule. We have designed a maze to absorb most of this energy, and carried out a Monte Carlo simulation to show that approximately 87% of the energy is dissipated in the maze, preventing the surface from getting excessively heated, even at high surface densities. This simulation varies the number of inelastic collisions with the maze wall for complete relaxation, the fraction of elastic collisions, and the angular distribution of excited molecules desorbing from the walls. article_processing_charge: No article_type: original author: - first_name: M. F. full_name: Chang, M. F. last_name: Chang - first_name: Latha full_name: Venkataraman, Latha id: 9ebb78a5-cc0d-11ee-8322-fae086a32caf last_name: Venkataraman orcid: 0000-0002-6957-6089 - first_name: I. F. full_name: Silvera, I. F. last_name: Silvera citation: ama: Chang MF, Venkataraman L, Silvera IF. Monte Carlo simulation of energy dissipation of recombining hydrogen in a maze. Journal of Low Temperature Physics. 1995;101(3-4):739-742. doi:10.1007/bf00753383 apa: Chang, M. F., Venkataraman, L., & Silvera, I. F. (1995). Monte Carlo simulation of energy dissipation of recombining hydrogen in a maze. Journal of Low Temperature Physics. Springer Nature. https://doi.org/10.1007/bf00753383 chicago: Chang, M. F., Latha Venkataraman, and I. F. Silvera. “Monte Carlo Simulation of Energy Dissipation of Recombining Hydrogen in a Maze.” Journal of Low Temperature Physics. Springer Nature, 1995. https://doi.org/10.1007/bf00753383. ieee: M. F. Chang, L. Venkataraman, and I. F. Silvera, “Monte Carlo simulation of energy dissipation of recombining hydrogen in a maze,” Journal of Low Temperature Physics, vol. 101, no. 3–4. Springer Nature, pp. 739–742, 1995. ista: Chang MF, Venkataraman L, Silvera IF. 1995. Monte Carlo simulation of energy dissipation of recombining hydrogen in a maze. Journal of Low Temperature Physics. 101(3–4), 739–742. mla: Chang, M. F., et al. “Monte Carlo Simulation of Energy Dissipation of Recombining Hydrogen in a Maze.” Journal of Low Temperature Physics, vol. 101, no. 3–4, Springer Nature, 1995, pp. 739–42, doi:10.1007/bf00753383. short: M.F. Chang, L. Venkataraman, I.F. Silvera, Journal of Low Temperature Physics 101 (1995) 739–742. date_created: 2024-09-10T06:11:33Z date_published: 1995-11-01T00:00:00Z date_updated: 2025-01-03T11:26:54Z day: '01' doi: 10.1007/bf00753383 extern: '1' intvolume: ' 101' issue: 3-4 language: - iso: eng month: '11' oa_version: None page: 739-742 publication: Journal of Low Temperature Physics publication_identifier: eissn: - 1573-7357 issn: - 0022-2291 publication_status: published publisher: Springer Nature quality_controlled: '1' scopus_import: '1' status: public title: Monte Carlo simulation of energy dissipation of recombining hydrogen in a maze type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 101 year: '1995' ... --- OA_type: closed access _id: '18049' abstract: - lang: eng text: The method of zone folding is applied to the calculation of the phonon mode frequencies in carbon nanotubules. The Raman and infrared-active mode frequencies are determined for nanotubules of different diameters and chiralities. article_processing_charge: No article_type: original author: - first_name: R. A. full_name: Jishi, R. A. last_name: Jishi - first_name: Latha full_name: Venkataraman, Latha id: 9ebb78a5-cc0d-11ee-8322-fae086a32caf last_name: Venkataraman orcid: 0000-0002-6957-6089 - first_name: M. S. full_name: Dresselhaus, M. S. last_name: Dresselhaus - first_name: G. full_name: Dresselhaus, G. last_name: Dresselhaus citation: ama: Jishi RA, Venkataraman L, Dresselhaus MS, Dresselhaus G. Symmetry properties of chiral carbon nanotubes. Physical Review B. 1995;51(16):11176-11179. doi:10.1103/physrevb.51.11176 apa: Jishi, R. A., Venkataraman, L., Dresselhaus, M. S., & Dresselhaus, G. (1995). Symmetry properties of chiral carbon nanotubes. Physical Review B. American Physical Society. https://doi.org/10.1103/physrevb.51.11176 chicago: Jishi, R. A., Latha Venkataraman, M. S. Dresselhaus, and G. Dresselhaus. “Symmetry Properties of Chiral Carbon Nanotubes.” Physical Review B. American Physical Society, 1995. https://doi.org/10.1103/physrevb.51.11176. ieee: R. A. Jishi, L. Venkataraman, M. S. Dresselhaus, and G. Dresselhaus, “Symmetry properties of chiral carbon nanotubes,” Physical Review B, vol. 51, no. 16. American Physical Society, pp. 11176–11179, 1995. ista: Jishi RA, Venkataraman L, Dresselhaus MS, Dresselhaus G. 1995. Symmetry properties of chiral carbon nanotubes. Physical Review B. 51(16), 11176–11179. mla: Jishi, R. A., et al. “Symmetry Properties of Chiral Carbon Nanotubes.” Physical Review B, vol. 51, no. 16, American Physical Society, 1995, pp. 11176–79, doi:10.1103/physrevb.51.11176. short: R.A. Jishi, L. Venkataraman, M.S. Dresselhaus, G. Dresselhaus, Physical Review B 51 (1995) 11176–11179. date_created: 2024-09-10T06:12:51Z date_published: 1995-04-15T00:00:00Z date_updated: 2025-01-03T11:28:42Z day: '15' doi: 10.1103/physrevb.51.11176 extern: '1' external_id: pmid: - '9977835' intvolume: ' 51' issue: '16' language: - iso: eng month: '04' oa_version: None page: 11176-11179 pmid: 1 publication: Physical Review B publication_identifier: eissn: - 1095-3795 issn: - 0163-1829 publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: Symmetry properties of chiral carbon nanotubes type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 51 year: '1995' ...