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  • Articles  (19)
  • 2000-2004  (19)
  • 2004  (19)
  • Computer Science  (19)
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  • Articles  (19)
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  • 2000-2004  (19)
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  • 1
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    Multiplex detection of RNA expression in Drosophila embryos (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-08-07
    Description: We present a fluorescence-based, multiplex in situ hybridization method that permits the simultaneous detection of five differently labeled antisense RNA probes and up to seven differ-ent transcripts in a single Drosophila embryo. We also show that it should be possible to increase the number of detected transcripts substantially with nascent transcript multiplex fluorescent in situ hybridization. These multiplex methods fill a current technological gap between high-resolution in situ hybridization with one or two fluorescently labeled probes and low-resolution but genome-wide microarray RNA profiling and should be of great utility in establishing gene networks.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kosman, Dave -- Mizutani, Claudia M -- Lemons, Derek -- Cox, W Gregory -- McGinnis, William -- Bier, Ethan -- 28315/PHS HHS/ -- NS29870/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2004 Aug 6;305(5685):846.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Section of Cell and Developmental Biology, University of California-San Diego, La Jolla, CA 92093, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15297669" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Drosophila/embryology/*genetics ; Embryo, Nonmammalian/*physiology ; Fluorescent Dyes ; *Gene Expression ; Gene Expression Profiling/*methods ; Genes, Insect ; *In Situ Hybridization, Fluorescence ; RNA Probes ; RNA, Messenger/*analysis/genetics ; Transcription, Genetic
    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
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    Superconductivity modulated by quantum size effects (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-12-14
    Description: We have fabricated ultrathin lead films on silicon substrates with atomic-scale control of the thickness over a macroscopic area. We observed oscillatory behavior of the superconducting transition temperature when the film thickness was increased by one atomic layer at a time. This oscillating behavior was shown to be a manifestation of the Fabry-Perot interference modes of electron de Broglie waves (quantum well states) in the films, which modulate the electron density of states near the Fermi level and the electron-phonon coupling, which are the two factors that control superconductivity transitions. This result suggests the possibility of modifying superconductivity and other physical properties of a thin film by exploiting well-controlled and thickness-dependent quantum size effects.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Guo, Yang -- Zhang, Yan-Feng -- Bao, Xin-Yu -- Han, Tie-Zhu -- Tang, Zhe -- Zhang, Li-Xin -- Zhu, Wen-Guang -- Wang, E G -- Niu, Qian -- Qiu, Z Q -- Jia, Jin-Feng -- Zhao, Zhong-Xian -- Xue, Qi-Kun -- New York, N.Y. -- Science. 2004 Dec 10;306(5703):1915-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15591197" 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
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    The rise of the rhizosolenid diatoms (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-04-24
    Description: The 18S ribosomal DNA molecular phylogeny and lipid composition of over 120 marine diatoms showed that the capability to biosynthesize highly branched isoprenoid (HBI) alkenes is restricted to two specific phylogenetic clusters, which independently evolved in centric and pennate diatoms. The molecular record of C25 HBI chemical fossils in a large suite of well-dated marine sediments and petroleum revealed that the older cluster, composed of rhizosolenid diatoms, evolved 91.5 +/- 1.5 million years ago (Upper Turonian), enabling an accurate dating of the pace of diatom evolution that is unprecedented. The rapid rise of the rhizosolenid diatoms probably resulted from a major reorganization of the nutrient budget in the mid-Cretaceous oceans, triggered by plate tectonics.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Damste, Jaap S Sinninghe -- Muyzer, Gerard -- Abbas, Ben -- Rampen, Sebastiaan W -- Masse, Guillaume -- Allard, W Guy -- Belt, Simon T -- Robert, Jean-Michel -- Rowland, Steven J -- Moldowan, J Michael -- Barbanti, Silvana M -- Fago, Frederick J -- Denisevich, Peter -- Dahl, Jeremy -- Trindade, Luiz A F -- Schouten, Stefan -- New York, N.Y. -- Science. 2004 Apr 23;304(5670):584-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Marine Biogeochemistry and Toxicology, Royal Netherlands Institute for Sea Research, Post Office Box 59, 1790 AB Den Burg, Texel, Netherlands. damste@nioz.nl〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15105500" target="_blank"〉PubMed〈/a〉
    Keywords: Alkenes/*analysis/metabolism ; *Biological Evolution ; DNA, Ribosomal/genetics ; *Diatoms/classification/genetics/metabolism ; Fossils ; *Geologic Sediments ; Lipids/biosynthesis ; Molecular Sequence Data ; Petroleum ; Phylogeny ; RNA, Ribosomal, 18S/genetics ; Terpenes/*analysis/metabolism
    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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    Statistically rigorous automated protein annotation (2004)
    Oxford University Press
    Details
    Publication Date: 2004-02-05
    Print ISSN: 1367-4803
    Electronic ISSN: 1460-2059
    Topics: Biology , Computer Science , Medicine
    Published by Oxford University Press
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  • 5
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    Lost at Sea: Where Is All the Plastic? (2004)
    American Association for the Advancement of Science
    Details
    Publication Date: 2004-05-07
    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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    Chemistry of rocks and soils at Meridiani Planum from the Alpha Particle X-ray Spectrometer (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-12-04
    Description: The Alpha Particle X-ray Spectrometer on the Opportunity rover determined major and minor elements of soils and rocks in Meridiani Planum. Chemical compositions differentiate between basaltic rocks, evaporite-rich rocks, basaltic soils, and hematite-rich soils. Although soils are compositionally similar to those at previous landing sites, differences in iron and some minor element concentrations signify the addition of local components. Rocky outcrops are rich in sulfur and variably enriched in bromine relative to chlorine. The interaction with water in the past is indicated by the chemical features in rocks and soils at this site.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rieder, R -- Gellert, R -- Anderson, R C -- Bruckner, J -- Clark, B C -- Dreibus, G -- Economou, T -- Klingelhofer, G -- Lugmair, G W -- Ming, D W -- Squyres, S W -- d'Uston, C -- Wanke, H -- Yen, A -- Zipfel, J -- New York, N.Y. -- Science. 2004 Dec 3;306(5702):1746-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Planck-Institut fur Chemie, J. J. Becher-Weg 27, D-55128 Mainz, Germany. rieder@mpch-mainz.mpg.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15576611" target="_blank"〉PubMed〈/a〉
    Keywords: Alpha Particles ; Bromine ; Chlorine ; Elements ; Extraterrestrial Environment ; Ferric Compounds ; Geologic Sediments ; Iron ; Magnesium ; *Mars ; Minerals ; Silicates ; Spacecraft ; Spectrometry, X-Ray Emission ; Sulfates ; Sulfur ; Water
    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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    Osedax: bone-eating marine worms with dwarf males (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-08-03
    Description: We describe a new genus, Osedax, and two new species of annelids with females that consume the bones of dead whales via ramifying roots. Molecular and morphological evidence revealed that Osedax belongs to the Siboglinidae, which includes pogonophoran and vestimentiferan worms from deep-sea vents, seeps, and anoxic basins. Osedax has skewed sex ratios with numerous dwarf (paedomorphic) males that live in the tubes of females. DNA sequences reveal that the two Osedax species diverged about 42 million years ago and currently maintain large populations ranging from 10(5) to 10(6) adult females.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rouse, G W -- Goffredi, S K -- Vrijenhoek, R C -- New York, N.Y. -- Science. 2004 Jul 30;305(5684):668-71.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉South Australian Museum, North Terrace, Adelaide SA 5000, Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15286372" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bacterial Physiological Phenomena ; Bone Marrow/metabolism ; Bone and Bones/*metabolism ; Female ; Male ; Phylogeny ; Polychaeta/anatomy & histology/*classification/microbiology/*physiology ; Population Density ; Seawater ; Sex Characteristics ; Sex Ratio ; Symbiosis ; Terminology as Topic ; Whales
    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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  • 8
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    Global mapping of the yeast genetic interaction network (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-02-07
    Description: A genetic interaction network containing approximately 1000 genes and approximately 4000 interactions was mapped by crossing mutations in 132 different query genes into a set of approximately 4700 viable gene yeast deletion mutants and scoring the double mutant progeny for fitness defects. Network connectivity was predictive of function because interactions often occurred among functionally related genes, and similar patterns of interactions tended to identify components of the same pathway. The genetic network exhibited dense local neighborhoods; therefore, the position of a gene on a partially mapped network is predictive of other genetic interactions. Because digenic interactions are common in yeast, similar networks may underlie the complex genetics associated with inherited phenotypes in other organisms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tong, Amy Hin Yan -- Lesage, Guillaume -- Bader, Gary D -- Ding, Huiming -- Xu, Hong -- Xin, Xiaofeng -- Young, James -- Berriz, Gabriel F -- Brost, Renee L -- Chang, Michael -- Chen, YiQun -- Cheng, Xin -- Chua, Gordon -- Friesen, Helena -- Goldberg, Debra S -- Haynes, Jennifer -- Humphries, Christine -- He, Grace -- Hussein, Shamiza -- Ke, Lizhu -- Krogan, Nevan -- Li, Zhijian -- Levinson, Joshua N -- Lu, Hong -- Menard, Patrice -- Munyana, Christella -- Parsons, Ainslie B -- Ryan, Owen -- Tonikian, Raffi -- Roberts, Tania -- Sdicu, Anne-Marie -- Shapiro, Jesse -- Sheikh, Bilal -- Suter, Bernhard -- Wong, Sharyl L -- Zhang, Lan V -- Zhu, Hongwei -- Burd, Christopher G -- Munro, Sean -- Sander, Chris -- Rine, Jasper -- Greenblatt, Jack -- Peter, Matthias -- Bretscher, Anthony -- Bell, Graham -- Roth, Frederick P -- Brown, Grant W -- Andrews, Brenda -- Bussey, Howard -- Boone, Charles -- GM39066/GM/NIGMS NIH HHS/ -- GM61221/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2004 Feb 6;303(5659):808-13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Banting and Best Department of Medical Research, University of Toronto, Toronto, ON, Canada M5G 1L6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14764870" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Computational Biology ; Cystic Fibrosis/genetics ; Gene Deletion ; Genes, Essential ; *Genes, Fungal ; Genetic Diseases, Inborn/genetics ; Genotype ; Humans ; Molecular Sequence Data ; Multifactorial Inheritance ; Mutation ; Phenotype ; Polymorphism, Genetic ; Retinitis Pigmentosa/genetics ; Saccharomyces cerevisiae/*genetics/*metabolism ; Saccharomyces cerevisiae Proteins/chemistry/genetics/*metabolism
    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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    Chemistry of rocks and soils in Gusev Crater from the alpha particle x-ray spectrometer (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-08-07
    Description: The alpha particle x-ray spectrometer on the Spirit rover determined major and minor elements of soils and rocks in Gusev crater in order to unravel the crustal evolution of planet Mars. The composition of soils is similar to those at previous landing sites, as a result of global mixing and distribution by dust storms. Rocks (fresh surfaces exposed by the rock abrasion tool) resemble volcanic rocks of primitive basaltic composition with low intrinsic potassium contents. High abundance of bromine (up to 170 parts per million) in rocks may indicate the alteration of surfaces formed during a past period of aqueous activity in Gusev crater.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gellert, R -- Rieder, R -- Anderson, R C -- Bruckner, J -- Clark, B C -- Dreibus, G -- Economou, T -- Klingelhofer, G -- Lugmair, G W -- Ming, D W -- Squyres, S W -- D'Uston, C -- Wanke, H -- Yen, A -- Zipfel, J -- New York, N.Y. -- Science. 2004 Aug 6;305(5685):829-32.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Planck-Institut fur Chemie, J. J. Becher-Weg 27, D-55128 Mainz, Germany. gellert@mpch-mainz.mpg.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15297665" target="_blank"〉PubMed〈/a〉
    Keywords: Alpha Particles ; Bromine ; *Elements ; Evolution, Planetary ; Extraterrestrial Environment ; Geologic Sediments ; *Mars ; Potassium ; Spectrum Analysis ; Water
    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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    Molecular borromean rings (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-05-29
    Description: The realization of the Borromean link in a wholly synthetic molecular form is reported. The self-assembly of this link, which is topologically achiral, from 18 components by the template-directed formation of 12 imine and 30 dative bonds, associated with the coordination of three interlocked macrocycles, each tetranucleating and decadentate overall, to a total of six zinc(II) ions, is near quantitative. Three macrocycles present diagonally in pairs, six exo-bidentate bipyridyl and six endo-diiminopyridyl ligands to the six zinc(II) ions. The use, in concert, of coordination, supramolecular, and dynamic covalent chemistry allowed the highly efficient construction, by multiple cooperative self-assembly processes, of a nanoscale dodecacation with an approximate diameter of 2.5 nanometers and an inner chamber of volume 250 A(3), lined with 12 oxygen atoms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chichak, Kelly S -- Cantrill, Stuart J -- Pease, Anthony R -- Chiu, Sheng-Hsien -- Cave, Gareth W V -- Atwood, Jerry L -- Stoddart, J Fraser -- New York, N.Y. -- Science. 2004 May 28;304(5675):1308-12.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry and Biochemistry and the California NanoSystems Institute, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, CA 90095, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15166376" 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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