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  • 1
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    Direct synthesis of long single-walled carbon nanotube strands (2002)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2002-05-04
    Description: In the processes that are used to produce single-walled nanotubes (electric arc, laser ablation, and chemical vapor deposition), the typical lengths of tangled nanotube bundles reach several tens of micrometers. We report that long nanotube strands, up to several centimeters in length, consisting of aligned single-walled nanotubes can be synthesized by the catalytic pyrolysis of n-hexane with an enhanced vertical floating technique. The long strands of nanotubes assemble continuously from arrays of nanotubes, which are intrinsically long.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhu, H W -- Xu, C L -- Wu, D H -- Wei, B Q -- Vajtai, R -- Ajayan, P M -- New York, N.Y. -- Science. 2002 May 3;296(5569):884-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11988567" 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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  • 2
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    Dnmt3L and the establishment of maternal genomic imprints (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-11-24
    Description: Complementary sets of genes are epigenetically silenced in male and female gametes in a process termed genomic imprinting. The Dnmt3L gene is expressed during gametogenesis at stages where genomic imprints are established. Targeted disruption of Dnmt3L caused azoospermia in homozygous males, and heterozygous progeny of homozygous females died before midgestation. Bisulfite genomic sequencing of DNA from oocytes and embryos showed that removal of Dnmt3L prevented methylation of sequences that are normally maternally methylated. The defect was specific to imprinted regions, and global genome methylation levels were not affected. Lack of maternal methylation imprints in heterozygous embryos derived from homozygous mutant oocytes caused biallelic expression of genes that are normally expressed only from the allele of paternal origin. The key catalytic motifs characteristic of DNA cytosine methyltransferases have been lost from Dnmt3L, and the protein is more likely to act as a regulator of imprint establishment than as a DNA methyltransferase.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bourc'his, D -- Xu, G L -- Lin, C S -- Bollman, B -- Bestor, T H -- GM59377/GM/NIGMS NIH HHS/ -- HD37687/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 2001 Dec 21;294(5551):2536-9. Epub 2001 Nov 22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Genetics and Development, Transgenic Animal Facility, Herbert Irving Comprehensive Cancer Center, College of Physicians and Surgeons of Columbia University, New York, NY 10032, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11719692" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Animals ; Autoantigens/genetics ; Catalytic Domain ; Crosses, Genetic ; DNA (Cytosine-5-)-Methyltransferase/chemistry/genetics/*physiology ; *DNA Methylation ; Embryo, Mammalian/cytology/*metabolism ; Female ; Gene Expression ; Gene Targeting ; *Genomic Imprinting ; Heterozygote ; Homozygote ; Male ; Mice ; Mutation ; Oocytes/*metabolism ; Oogenesis ; Phenotype ; *Ribonucleoproteins, Small Nuclear ; Stem Cells ; Testis/metabolism ; snRNP Core Proteins
    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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    A map of the interactome network of the metazoan C. elegans (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-01-06
    Description: To initiate studies on how protein-protein interaction (or "interactome") networks relate to multicellular functions, we have mapped a large fraction of the Caenorhabditis elegans interactome network. Starting with a subset of metazoan-specific proteins, more than 4000 interactions were identified from high-throughput, yeast two-hybrid (HT=Y2H) screens. Independent coaffinity purification assays experimentally validated the overall quality of this Y2H data set. Together with already described Y2H interactions and interologs predicted in silico, the current version of the Worm Interactome (WI5) map contains approximately 5500 interactions. Topological and biological features of this interactome network, as well as its integration with phenome and transcriptome data sets, lead to numerous biological hypotheses.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1698949/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1698949/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, Siming -- Armstrong, Christopher M -- Bertin, Nicolas -- Ge, Hui -- Milstein, Stuart -- Boxem, Mike -- Vidalain, Pierre-Olivier -- Han, Jing-Dong J -- Chesneau, Alban -- Hao, Tong -- Goldberg, Debra S -- Li, Ning -- Martinez, Monica -- Rual, Jean-Francois -- Lamesch, Philippe -- Xu, Lai -- Tewari, Muneesh -- Wong, Sharyl L -- Zhang, Lan V -- Berriz, Gabriel F -- Jacotot, Laurent -- Vaglio, Philippe -- Reboul, Jerome -- Hirozane-Kishikawa, Tomoko -- Li, Qianru -- Gabel, Harrison W -- Elewa, Ahmed -- Baumgartner, Bridget -- Rose, Debra J -- Yu, Haiyuan -- Bosak, Stephanie -- Sequerra, Reynaldo -- Fraser, Andrew -- Mango, Susan E -- Saxton, William M -- Strome, Susan -- Van Den Heuvel, Sander -- Piano, Fabio -- Vandenhaute, Jean -- Sardet, Claude -- Gerstein, Mark -- Doucette-Stamm, Lynn -- Gunsalus, Kristin C -- Harper, J Wade -- Cusick, Michael E -- Roth, Frederick P -- Hill, David E -- Vidal, Marc -- R01 AG011085/AG/NIA NIH HHS/ -- R01 GM034059/GM/NIGMS NIH HHS/ -- R01 GM034059-18/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2004 Jan 23;303(5657):540-3. Epub 2004 Jan 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Dana-Farber Cancer Institute and Department of Genetics, Harvard Medical School, 44 Binney Street, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14704431" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Caenorhabditis elegans/genetics/*metabolism ; Caenorhabditis elegans Proteins/genetics/*metabolism ; Computational Biology ; Evolution, Molecular ; Genes, Helminth ; Genomics ; Open Reading Frames ; Phenotype ; Protein Binding ; Proteome/*metabolism ; Transcription, Genetic ; Two-Hybrid System Techniques
    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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  • 4
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    Abrupt tropical vegetation response to rapid climate changes (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-05-25
    Description: Identifying leads and lags between high- and low-latitude abrupt climate shifts is needed to understand where and how such events were triggered. Vascular plant biomarkers preserved in Cariaco basin sediments reveal rapid vegetation changes in northern South America during the last deglaciation, 15,000 to 10,000 years ago. Comparing the biomarker records to climate proxies from the same sediment core provides a precise measure of the relative timing of changes in different regions. Abrupt deglacial climate shifts in tropical and high-latitude North Atlantic regions were synchronous, whereas changes in tropical vegetation consistently lagged climate shifts by several decades.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hughen, Konrad A -- Eglinton, Timothy I -- Xu, Li -- Makou, Matthew -- New York, N.Y. -- Science. 2004 Jun 25;304(5679):1955-9. Epub 2004 May 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA. khughen@whoi.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15155911" target="_blank"〉PubMed〈/a〉
    Keywords: Atmosphere ; Biomass ; Carbon/analysis ; Carbon Isotopes/analysis ; *Climate ; Geography ; Geologic Sediments/chemistry ; Methane ; Organic Chemicals/*analysis ; *Plant Development ; Plants/metabolism ; South America ; Time ; Trees ; *Tropical Climate
    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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  • 5
    Electronic Resource
    Electronic Resource
    Tribocharging phenomena in hard disk amorphous carbon coatings with and without perfluoropolyether lubricants (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 89 (2001), S. 3993-3998 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Scanning polarization force microscopy was used to study changes in surface potential (tribocharging) caused by the contact between a tungsten carbide tip and the amorphous carbon coating of a hard disk, both when bare and when covered with Zdol-TX lubricant. The surface potential change produced by tip contact decays with time at a rate that is strongly dependent on lubricant coverage and on the presence of oxygen and water vapor in the environment. Two different charging mechanisms are proposed. One involves chemical modification of the surface by removal of oxygen bound to the surface. This gives rise to a potential change that decays with time. Another mechanism involves trapping of charge in states within the energy gap of the insulating carbon film. The potential change due to this trapped charge does not decay over periods much greater than 1 h. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1351001
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