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  • Wiley-Blackwell  (7,094)
  • American Association for the Advancement of Science (AAAS)  (4,025)
  • International Union of Crystallography  (3,416)
  • 1995-1999  (7,086)
  • 1985-1989  (7,368)
  • 1940-1944  (81)
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  • 1
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    A gene map of the human genome (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-10-25
    Description: The human genome is thought to harbor 50,000 to 100,000 genes, of which about half have been sampled to date in the form of expressed sequence tags. An international consortium was organized to develop and map gene-based sequence tagged site markers on a set of two radiation hybrid panels and a yeast artificial chromosome library. More than 16,000 human genes have been mapped relative to a framework map that contains about 1000 polymorphic genetic markers. The gene map unifies the existing genetic and physical maps with the nucleotide and protein sequence databases in a fashion that should speed the discovery of genes underlying inherited human disease. The integrated resource is available through a site on the World Wide Web at http://www.ncbi.nlm.nih.gov/SCIENCE96/.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schuler, G D -- Boguski, M S -- Stewart, E A -- Stein, L D -- Gyapay, G -- Rice, K -- White, R E -- Rodriguez-Tome, P -- Aggarwal, A -- Bajorek, E -- Bentolila, S -- Birren, B B -- Butler, A -- Castle, A B -- Chiannilkulchai, N -- Chu, A -- Clee, C -- Cowles, S -- Day, P J -- Dibling, T -- Drouot, N -- Dunham, I -- Duprat, S -- East, C -- Edwards, C -- Fan, J B -- Fang, N -- Fizames, C -- Garrett, C -- Green, L -- Hadley, D -- Harris, M -- Harrison, P -- Brady, S -- Hicks, A -- Holloway, E -- Hui, L -- Hussain, S -- Louis-Dit-Sully, C -- Ma, J -- MacGilvery, A -- Mader, C -- Maratukulam, A -- Matise, T C -- McKusick, K B -- Morissette, J -- Mungall, A -- Muselet, D -- Nusbaum, H C -- Page, D C -- Peck, A -- Perkins, S -- Piercy, M -- Qin, F -- Quackenbush, J -- Ranby, S -- Reif, T -- Rozen, S -- Sanders, C -- She, X -- Silva, J -- Slonim, D K -- Soderlund, C -- Sun, W L -- Tabar, P -- Thangarajah, T -- Vega-Czarny, N -- Vollrath, D -- Voyticky, S -- Wilmer, T -- Wu, X -- Adams, M D -- Auffray, C -- Walter, N A -- Brandon, R -- Dehejia, A -- Goodfellow, P N -- Houlgatte, R -- Hudson, J R Jr -- Ide, S E -- Iorio, K R -- Lee, W Y -- Seki, N -- Nagase, T -- Ishikawa, K -- Nomura, N -- Phillips, C -- Polymeropoulos, M H -- Sandusky, M -- Schmitt, K -- Berry, R -- Swanson, K -- Torres, R -- Venter, J C -- Sikela, J M -- Beckmann, J S -- Weissenbach, J -- Myers, R M -- Cox, D R -- James, M R -- Bentley, D -- Deloukas, P -- Lander, E S -- Hudson, T J -- HG00098/HG/NHGRI NIH HHS/ -- HG00206/HG/NHGRI NIH HHS/ -- HG00835/HG/NHGRI NIH HHS/ -- Wellcome Trust/United Kingdom -- etc. -- New York, N.Y. -- Science. 1996 Oct 25;274(5287):540-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, 8600 Rockville Pike, Bethesda, MD 20894, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8849440" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Cell Line ; *Chromosome Mapping ; Chromosomes, Artificial, Yeast ; Computer Communication Networks ; DNA, Complementary/genetics ; Databases, Factual ; Gene Expression ; Genetic Markers ; *Genome, Human ; *Human Genome Project ; Humans ; Multigene Family ; RNA, Messenger/genetics ; Sequence Homology, Nucleic Acid ; Sequence Tagged Sites
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of titanium surface roughness on proliferation, differentiation, and protein synthesis of human osteoblast-like cells (MG63) (1995)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 29 (1995), S. 389-401 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: The effect of surface roughness on osteoblast proliferation, differentiation, and protein synthesis was examined. Human osteoblast-like cells (MG63) were cultured on titanium (Ti) disks that had been prepared by one of five different treatment regimens. All disks were pretreated with hydrofluoric acid-nitric acid and washed (PT). PT disks were also: washed, and then electropolished (EP); fine sandblasted, etched with HCl and H2SO4, and washed (FA); coarse sandblasted, etched with HCl and H2SO4, and washed (CA); or Ti plasma-sprayed (TPS). Standard tissue culture plastic was used as a control. Surface topography and profile were evaluated by brightfield and darkfield microscopy, cold field emission scanning electron microscopy, and laser confocal microscopy, while chemical composition was mapped using energy dispersion X-ray analysis and elemental distribution determined using Auger electron spectroscopy. The effect of surface roughness on the cells was evaluated by measuring cell number, [3H]thymidine incorporation into DNA, alkaline phosphatase specific activity, [3H]uridine incorporation into RNA, [3H]proline incorporation into collagenase digestible protein (CDP) and noncollagenase-digestible protein (NCP), and [35S]sulfate incorporation into proteoglycan.Based on surface analysis, the five different Ti surfaces were ranked in order of smoothest to roughest: EP, PT, FA, CA, and TPS. A TiO2 layer was found on all surfaces that ranged in thickness from 100 Å in the smoothest group to 300 Å in the roughest. When compared to confluent cultures of cells on plastic, the number of cells was reduced on the TPS surfaces and increased on the EP surfaces, while the number of cells on the other surfaces was equivalent to plastic. [3H]Thymidine incorporation was inversely related to surface roughness. Alkaline phosphatase specific activity in isolated cells was found to decrease with increasing surface roughness, except for those cells cultured on CA. In contrast, enzyme activity in the cell layer was only decreased in cultures grown on FA- and TPS-treated surfaces. A direct correlation between surface roughness and RNA and CDP production was found. Surface roughness had no apparent effect on NCP production. Proteoglycan synthesis by the cells was inhibited on all the surfaces studied, with the largest inhibition observed in the CA and EP groups. These results demonstrate that surface roughness alters osteoblast proliferation, differentiation, and matrix production in vitro. The results also suggest that implant surface roughness may play a role in determining phenotypic expression of cells in vivo.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820290314
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  • 3
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    Voyager 2 at neptune: imaging science results (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-12-15
    Description: Voyager 2 images of Neptune reveal a windy planet characterized by bright clouds of methane ice suspended in an exceptionally clear atmosphere above a lower deck of hydrogen sulfide or ammonia ices. Neptune's atmosphere is dominated by a large anticyclonic storm system that has been named the Great Dark Spot (GDS). About the same size as Earth in extent, the GDS bears both many similarities and some differences to the Great Red Spot of Jupiter. Neptune's zonal wind profile is remarkably similar to that of Uranus. Neptune has three major rings at radii of 42,000, 53,000, and 63,000 kilometers. The outer ring contains three higher density arc-like segments that were apparently responsible for most of the ground-based occultation events observed during the current decade. Like the rings of Uranus, the Neptune rings are composed of very dark material; unlike that of Uranus, the Neptune system is very dusty. Six new regular satellites were found, with dark surfaces and radii ranging from 200 to 25 kilometers. All lie inside the orbit of Triton and the inner four are located within the ring system. Triton is seen to be a differentiated body, with a radius of 1350 kilometers and a density of 2.1 grams per cubic centimeter; it exhibits clear evidence of early episodes of surface melting. A now rigid crust of what is probably water ice is overlain with a brilliant coating of nitrogen frost, slightly darkened and reddened with organic polymer material. Streaks of organic polymer suggest seasonal winds strong enough to move particles of micrometer size or larger, once they become airborne. At least two active plumes were seen, carrying dark material 8 kilometers above the surface before being transported downstream by high level winds. The plumes may be driven by solar heating and the subsequent violent vaporization of subsurface nitrogen.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Smith, B A -- Soderblom, L A -- Banfield, D -- Barnet, C -- Basilevsky, A T -- Beebe, R F -- Bollinger, K -- Boyce, J M -- Brahic, A -- Briggs, G A -- Brown, R H -- Chyba, C -- Collins, S A -- Colvin, T -- Cook, A F 2nd -- Crisp, D -- Croft, S K -- Cruikshank, D -- Cuzzi, J N -- Danielson, G E -- Davies, M E -- De Jong, E -- Dones, L -- Godfrey, D -- Goguen, J -- Grenier, I -- Haemmerle, V R -- Hammel, H -- Hansen, C J -- Helfenstein, C P -- Howell, C -- Hunt, G E -- Ingersoll, A P -- Johnson, T V -- Kargel, J -- Kirk, R -- Kuehn, D I -- Limaye, S -- Masursky, H -- McEwen, A -- Morrison, D -- Owen, T -- Owen, W -- Pollack, J B -- Porco, C C -- Rages, K -- Rogers, P -- Rudy, D -- Sagan, C -- Schwartz, J -- Shoemaker, E M -- Showalter, M -- Sicardy, B -- Simonelli, D -- Spencer, J -- Sromovsky, L A -- Stoker, C -- Strom, R G -- Suomi, V E -- Synott, S P -- Terrile, R J -- Thomas, P -- Thompson, W R -- Verbiscer, A -- Veverka, J -- New York, N.Y. -- Science. 1989 Dec 15;246(4936):1422-49.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17755997" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
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    A physical map of 30,000 human genes (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-10-23
    Description: A map of 30,181 human gene-based markers was assembled and integrated with the current genetic map by radiation hybrid mapping. The new gene map contains nearly twice as many genes as the previous release, includes most genes that encode proteins of known function, and is twofold to threefold more accurate than the previous version. A redesigned, more informative and functional World Wide Web site (www.ncbi.nlm.nih.gov/genemap) provides the mapping information and associated data and annotations. This resource constitutes an important infrastructure and tool for the study of complex genetic traits, the positional cloning of disease genes, the cross-referencing of mammalian genomes, and validated human transcribed sequences for large-scale studies of gene expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Deloukas, P -- Schuler, G D -- Gyapay, G -- Beasley, E M -- Soderlund, C -- Rodriguez-Tome, P -- Hui, L -- Matise, T C -- McKusick, K B -- Beckmann, J S -- Bentolila, S -- Bihoreau, M -- Birren, B B -- Browne, J -- Butler, A -- Castle, A B -- Chiannilkulchai, N -- Clee, C -- Day, P J -- Dehejia, A -- Dibling, T -- Drouot, N -- Duprat, S -- Fizames, C -- Fox, S -- Gelling, S -- Green, L -- Harrison, P -- Hocking, R -- Holloway, E -- Hunt, S -- Keil, S -- Lijnzaad, P -- Louis-Dit-Sully, C -- Ma, J -- Mendis, A -- Miller, J -- Morissette, J -- Muselet, D -- Nusbaum, H C -- Peck, A -- Rozen, S -- Simon, D -- Slonim, D K -- Staples, R -- Stein, L D -- Stewart, E A -- Suchard, M A -- Thangarajah, T -- Vega-Czarny, N -- Webber, C -- Wu, X -- Hudson, J -- Auffray, C -- Nomura, N -- Sikela, J M -- Polymeropoulos, M H -- James, M R -- Lander, E S -- Hudson, T J -- Myers, R M -- Cox, D R -- Weissenbach, J -- Boguski, M S -- Bentley, D R -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 1998 Oct 23;282(5389):744-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Sanger Centre, Hinxton Hall, Hinxton, Cambridge CB10 1SA UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9784132" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chromosomes, Human/*genetics ; Expressed Sequence Tags ; Gene Expression ; Genetic Markers ; *Genome, Human ; Human Genome Project ; Humans ; Internet ; *Physical Chromosome Mapping ; Rats ; Sequence Tagged Sites
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
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    A receptor in pituitary and hypothalamus that functions in growth hormone release (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-08-16
    Description: Small synthetic molecules termed growth hormone secretagogues (GHSs) act on the pituitary gland and the hypothalamus to stimulate and amplify pulsatile growth hormone (GH) release. A heterotrimeric GTP-binding protein (G protein)-coupled receptor (GPC-R) of the pituitary and arcuate ventro-medial and infundibular hypothalamus of swine and humans was cloned and was shown to be the target of the GHSs. On the basis of its pharmacological and molecular characterization, this GPC-R defines a neuroendocrine pathway for the control of pulsatile GH release and supports the notion that the GHSs mimic an undiscovered hormone.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Howard, A D -- Feighner, S D -- Cully, D F -- Arena, J P -- Liberator, P A -- Rosenblum, C I -- Hamelin, M -- Hreniuk, D L -- Palyha, O C -- Anderson, J -- Paress, P S -- Diaz, C -- Chou, M -- Liu, K K -- McKee, K K -- Pong, S S -- Chaung, L Y -- Elbrecht, A -- Dashkevicz, M -- Heavens, R -- Rigby, M -- Sirinathsinghji, D J -- Dean, D C -- Melillo, D G -- Patchett, A A -- Nargund, R -- Griffin, P R -- DeMartino, J A -- Gupta, S K -- Schaeffer, J M -- Smith, R G -- Van der Ploeg, L H -- New York, N.Y. -- Science. 1996 Aug 16;273(5277):974-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Merck Research Laboratories, Rahway, NJ 07065, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8688086" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Cell Line ; Codon ; DNA, Complementary/genetics ; GTP-Binding Proteins/metabolism ; Growth Hormone/*secretion ; Hormones/*metabolism ; Humans ; Hypothalamus, Middle/chemistry ; Indoles/*metabolism/pharmacology ; Macaca mulatta ; Molecular Sequence Data ; Oligopeptides/*metabolism ; Pituitary Gland/chemistry ; RNA, Complementary/genetics ; Rats ; Receptors, Cell Surface/analysis/chemistry/genetics/*metabolism ; *Receptors, G-Protein-Coupled ; Receptors, Ghrelin ; Spiro Compounds/*metabolism/pharmacology ; Swine
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 6
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    Radar and optical observations of asteroid 1998 KY26 (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-27
    Description: Observations of near-Earth asteroid 1998 KY26 shortly after its discovery reveal a slightly elongated spheroid with a diameter of about 30 meters, a composition analogous to carbonaceous chondritic meteorites, and a rotation period of 10.7 minutes, which is an order of magnitude shorter than that measured for any other solar system object. The rotation is too rapid for 1998 KY26 to consist of multiple components bound together just by their mutual gravitational attraction. This monolithic object probably is a fragment derived from cratering or collisional destruction of a much larger asteroid.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ostro -- Pravec -- Benner -- Hudson -- Sarounova -- Hicks -- Rabinowitz -- Scotti -- Tholen -- Wolf -- Jurgens -- Thomas -- Giorgini -- Chodas -- Yeomans -- Rose -- Frye -- Rosema -- Winkler -- Slade -- New York, N.Y. -- Science. 1999 Jul 23;285(5427):557-60.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109-8099, USA. Astronomical Institute, Academy of Sciences of the Czech Republic, CZ-25165 Ond&rbreve;ejov, Czech Republic. School of Electrical Engineering and.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10417379" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
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    Radar detection of the nucleus and coma of comet hyakutake (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-12-24
    Description: Radar observations of comet Hyakutake (C/1996 B2) made at the Goldstone Deep Space Communications Complex in California have detected echoes from the nucleus and from large grains in the inner coma. The nucleus of this bright comet was estimated to be only 2 to 3 kilometers in diameter. Models of the coma echo indicate backscatter from porous, centimeter-size grains ejected anisotropically at velocities of tens of meters per second. The radar observations suggest that a comet's activity may be a poor indicator of its size and provide evidence that large grains constitute an important component of the mass loss from a typical active comet.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Harmon -- Ostro -- Benner -- Rosema -- Jurgens -- Winkler -- Yeomans -- Choate -- Cormier -- Giorgini -- Mitchell -- Chodas -- Rose -- Kelley -- Slade -- Thomas -- New York, N.Y. -- Science. 1997 Dec 12;278(5345):1921-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉J. K. Harmon, National Astronomy and Ionosphere Center, Arecibo Observatory, Post Office Box 995, Arecibo, PR 00614, USA. S. J. Ostro, L. A. M. Benner, K. D. Rosema, R. F. Jurgens, R. Winkler, D. K. Yeomans, D. Choate, R. Cormier, J. D. Giorg.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9395389" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
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  • 8
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    Design of Nonionic Surfactants for Supercritical Carbon Dioxide (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-12-20
    Description: Interfacially active block copolymer amphiphiles have been synthesized and their self-assembly into micelles in supercritical carbon dioxide (CO2) has been demonstrated with small-angle neutron scattering (SANS). These materials establish the design criteria for molecularly engineered surfactants that can stabilize and disperse otherwise insoluble matter into a CO2 continuous phase. Polystyrene-b-poly(1,1-dihydroperfluorooctyl acrylate) copolymers self-assembled into polydisperse core-shell-type micelles as a result of the disparate solubility characteristics of the different block segments in CO2. These nonionic surfactants for CO2 were shown by SANS to be capable of emulsifying up to 20 percent by weight of a CO2-insoluble hydrocarbon into CO2. This result demonstrates the efficacy of surfactant-modified CO2 in reducing the large volumes of organic and halogenated solvent waste streams released into our environment by solvent-intensive manufacturing and process industries.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McClain -- Betts -- Canelas -- Samulski -- DeSimone -- Londono -- Cochran -- Wignall -- Chillura-Martino -- Triolo -- New York, N.Y. -- Science. 1996 Dec 20;274(5295):2049-52.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉J. B. McClain, D. E. Betts, D. A. Canelas, E. T. Samulski, J. M. DeSimone, Department of Chemistry, University of North Carolina, CB 3290, Venable and Kenan Laboratories, Chapel Hill, NC 27599, USA. J. D. Londono, H. D. Cochran, G. D. Wignall, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA. D. Chillura-Martino and R. Triolo, Departimento di Chimica Fisica, University of Palermo, 90123 Palermo, Italy.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8953029" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
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    The minimal gene complement of Mycoplasma genitalium (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-10-20
    Description: The complete nucleotide sequence (580,070 base pairs) of the Mycoplasma genitalium genome, the smallest known genome of any free-living organism, has been determined by whole-genome random sequencing and assembly. A total of only 470 predicted coding regions were identified that include genes required for DNA replication, transcription and translation, DNA repair, cellular transport, and energy metabolism. Comparison of this genome to that of Haemophilus influenzae suggests that differences in genome content are reflected as profound differences in physiology and metabolic capacity between these two organisms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fraser, C M -- Gocayne, J D -- White, O -- Adams, M D -- Clayton, R A -- Fleischmann, R D -- Bult, C J -- Kerlavage, A R -- Sutton, G -- Kelley, J M -- Fritchman, R D -- Weidman, J F -- Small, K V -- Sandusky, M -- Fuhrmann, J -- Nguyen, D -- Utterback, T R -- Saudek, D M -- Phillips, C A -- Merrick, J M -- Tomb, J F -- Dougherty, B A -- Bott, K F -- Hu, P C -- Lucier, T S -- Peterson, S N -- Smith, H O -- Hutchison, C A 3rd -- Venter, J C -- AI33161/AI/NIAID NIH HHS/ -- AIO8998/AI/NIAID NIH HHS/ -- HL19171/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1995 Oct 20;270(5235):397-403.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Genomic Research, Rockville, MD 20850, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7569993" target="_blank"〉PubMed〈/a〉
    Keywords: Antigenic Variation/genetics ; Bacterial Proteins/genetics ; Biological Transport/genetics ; DNA Repair/genetics ; DNA Replication/genetics ; DNA, Bacterial/genetics ; Databases, Factual ; Energy Metabolism/genetics ; Genes, Bacterial ; *Genome, Bacterial ; Haemophilus influenzae/genetics ; Molecular Sequence Data ; Mycoplasma/*genetics/immunology/metabolism ; Open Reading Frames ; Protein Biosynthesis ; *Sequence Analysis, DNA ; Transcription, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
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    The Morphology of Block Copolymer Micelles in Supercritical Carbon Dioxide by Small-Angle Neutron and X-ray Scattering (1997)
    International Union of Crystallography
    Details
    Publication Date: 1997-10-01
    Description: Above its critical point, carbon dioxide forms a super-critical fluid, which promises to be an environmentally responsible replacement for the organic solvents traditionally used in polymerizations. Many lipophilic polymers such as polystyrene (PS) are insoluble in CO2, though polymerizations may be accomplished via the use of PS-fluoropolymer stabilizers, which act as emulsifying agents. Small-angle neutron and X-ray scattering have been used to show that these molecules form micelles with a CO2-phobic PS core and a CO2-philic fluoropolymer corona. When the PS block was fixed in length and the fluorinated corona block was varied, the number of block copolymer molecules per micelle (six to seven) remained constant. Thus, the coronal block molecular weight exerts negligible influence on the aggregation number, in accordance with the theoretical predictions of Halperin, Tirrell & Lodge [Adv. Polym. Sci. (1992), 100, 31–46]. These observations are relevant to understanding the mechanisms of micellization and solubilization in supercritical fluids.
    Print ISSN: 0021-8898
    Electronic ISSN: 1600-5767
    Topics: Geosciences , Physics
    Published by International Union of Crystallography
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