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  • INSTRUMENTATION AND PHOTOGRAPHY  (6)
  • METALLIC MATERIALS  (4)
  • Molecular Sequence Data  (4)
  • 1
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    Self-incompatibility: a self-recognition system in plants (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-11-16
    Description: Self-incompatibility (SI), a genetically controlled mechanism to prevent inbreeding in plants, offers a relatively simple model system for studying the interactions between plant cells or between a plant cell and the secreted product or products of another cell. Examples of two major types of SI, gametophytic and sporophytic, have been studied by cloning cDNAs corresponding to glycoproteins of the female tissues that segregate with particular variants encoded by the putative S locus. These secreted glycoproteins are envisaged to interact with the currently undescribed pollen component to cause arrest of pollen tube growth.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Haring, V -- Gray, J E -- McClure, B A -- Anderson, M A -- Clarke, A E -- New York, N.Y. -- Science. 1990 Nov 16;250(4983):937-41.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Plant Cell Biology Research Centre, School of Botany, University of Melbourne, Parkville, Victoria, Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2237440" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Glycoproteins/genetics ; Molecular Sequence Data ; *Plant Physiological Phenomena ; Plant Proteins/genetics ; Plants/genetics ; Plants, Toxic ; Reproduction ; Tobacco
    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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    Symbiotic nitrogen fixation in the fungus gardens of leaf-cutter ants (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-12-08
    Description: Bacteria-mediated acquisition of atmospheric N2 serves as a critical source of nitrogen in terrestrial ecosystems. Here we reveal that symbiotic nitrogen fixation facilitates the cultivation of specialized fungal crops by leaf-cutter ants. By using acetylene reduction and stable isotope experiments, we demonstrated that N2 fixation occurred in the fungus gardens of eight leaf-cutter ant species and, further, that this fixed nitrogen was incorporated into ant biomass. Symbiotic N2-fixing bacteria were consistently isolated from the fungus gardens of 80 leaf-cutter ant colonies collected in Argentina, Costa Rica, and Panama. The discovery of N2 fixation within the leaf-cutter ant-microbe symbiosis reveals a previously unrecognized nitrogen source in neotropical ecosystems.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pinto-Tomas, Adrian A -- Anderson, Mark A -- Suen, Garret -- Stevenson, David M -- Chu, Fiona S T -- Cleland, W Wallace -- Weimer, Paul J -- Currie, Cameron R -- GM 18938/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 2009 Nov 20;326(5956):1120-3. doi: 10.1126/science.1173036.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Bacteriology, University of Wisconsin-Madison, 1550 Linden Drive, Madison, WI 53706, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19965433" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylene/metabolism ; Animals ; Ants/metabolism/microbiology/*physiology ; Argentina ; Costa Rica ; *Ecosystem ; Fungi/growth & development/*physiology ; Klebsiella/isolation & purification/*metabolism ; Molecular Sequence Data ; Nitrogen/analysis/metabolism ; *Nitrogen Fixation ; Oxidation-Reduction ; Panama ; Pantoea/isolation & purification/*metabolism ; Phylogeny ; Plant Leaves/chemistry ; *Symbiosis
    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 compendium of RNA-binding motifs for decoding gene regulation (2013)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2013-07-13
    Description: RNA-binding proteins are key regulators of gene expression, yet only a small fraction have been functionally characterized. Here we report a systematic analysis of the RNA motifs recognized by RNA-binding proteins, encompassing 205 distinct genes from 24 diverse eukaryotes. The sequence specificities of RNA-binding proteins display deep evolutionary conservation, and the recognition preferences for a large fraction of metazoan RNA-binding proteins can thus be inferred from their RNA-binding domain sequence. The motifs that we identify in vitro correlate well with in vivo RNA-binding data. Moreover, we can associate them with distinct functional roles in diverse types of post-transcriptional regulation, enabling new insights into the functions of RNA-binding proteins both in normal physiology and in human disease. These data provide an unprecedented overview of RNA-binding proteins and their targets, and constitute an invaluable resource for determining post-transcriptional regulatory mechanisms in eukaryotes.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3929597/" 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/PMC3929597/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ray, Debashish -- Kazan, Hilal -- Cook, Kate B -- Weirauch, Matthew T -- Najafabadi, Hamed S -- Li, Xiao -- Gueroussov, Serge -- Albu, Mihai -- Zheng, Hong -- Yang, Ally -- Na, Hong -- Irimia, Manuel -- Matzat, Leah H -- Dale, Ryan K -- Smith, Sarah A -- Yarosh, Christopher A -- Kelly, Seth M -- Nabet, Behnam -- Mecenas, Desirea -- Li, Weimin -- Laishram, Rakesh S -- Qiao, Mei -- Lipshitz, Howard D -- Piano, Fabio -- Corbett, Anita H -- Carstens, Russ P -- Frey, Brendan J -- Anderson, Richard A -- Lynch, Kristen W -- Penalva, Luiz O F -- Lei, Elissa P -- Fraser, Andrew G -- Blencowe, Benjamin J -- Morris, Quaid D -- Hughes, Timothy R -- 1R01HG00570/HG/NHGRI NIH HHS/ -- DK015602-05/DK/NIDDK NIH HHS/ -- MOP-125894/Canadian Institutes of Health Research/Canada -- MOP-14409/Canadian Institutes of Health Research/Canada -- MOP-49451/Canadian Institutes of Health Research/Canada -- MOP-67011/Canadian Institutes of Health Research/Canada -- MOP-93671/Canadian Institutes of Health Research/Canada -- P30 CA014520/CA/NCI NIH HHS/ -- R01 CA104708/CA/NCI NIH HHS/ -- R01 GM051968/GM/NIGMS NIH HHS/ -- R01 GM084034/GM/NIGMS NIH HHS/ -- R01 HG005700/HG/NHGRI NIH HHS/ -- R01GM084034/GM/NIGMS NIH HHS/ -- T32 GM008061/GM/NIGMS NIH HHS/ -- Z01 DK015602-01/Intramural NIH HHS/ -- England -- Nature. 2013 Jul 11;499(7457):172-7. doi: 10.1038/nature12311.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Donnelly Centre, University of Toronto, Toronto M5S 3E1, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23846655" target="_blank"〉PubMed〈/a〉
    Keywords: Autistic Disorder/genetics ; Base Sequence ; Binding Sites/genetics ; Conserved Sequence/genetics ; Eukaryotic Cells/metabolism ; Gene Expression Regulation/*genetics ; Humans ; Molecular Sequence Data ; Nucleotide Motifs/*genetics ; Protein Structure, Tertiary/genetics ; RNA Stability/genetics ; RNA-Binding Proteins/chemistry/genetics/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 4
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    SEX DETERMINATION. A male-determining factor in the mosquito Aedes aegypti (2015)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2015-05-23
    Description: Sex determination in the mosquito Aedes aegypti is governed by a dominant male-determining factor (M factor) located within a Y chromosome-like region called the M locus. Here, we show that an M-locus gene, Nix, functions as an M factor in A. aegypti. Nix exhibits persistent M linkage and early embryonic expression, two characteristics required of an M factor. Nix knockout with clustered regularly interspaced short palindromic repeats (CRISPR)-Cas9 resulted in largely feminized genetic males and the production of female isoforms of two key regulators of sexual differentiation: doublesex and fruitless. Ectopic expression of Nix resulted in genetic females with nearly complete male genitalia. Thus, Nix is both required and sufficient to initiate male development. This study provides a foundation for mosquito control strategies that convert female mosquitoes into harmless males.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hall, Andrew Brantley -- Basu, Sanjay -- Jiang, Xiaofang -- Qi, Yumin -- Timoshevskiy, Vladimir A -- Biedler, James K -- Sharakhova, Maria V -- Elahi, Rubayet -- Anderson, Michelle A E -- Chen, Xiao-Guang -- Sharakhov, Igor V -- Adelman, Zach N -- Tu, Zhijian -- AI113643/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2015 Jun 12;348(6240):1268-70. doi: 10.1126/science.aaa2850. Epub 2015 May 21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Interdisciplinary PhD Program in Genetics, Bioinformatics, and Computational Biology, Virginia Polytechnic Institute and State University (Virginia Tech), Blacksburg, VA, USA. Department of Biochemistry, Virginia Tech, Blacksburg, VA, USA. Fralin Life Science Institute, Virginia Tech, Blacksburg, VA, USA. ; Fralin Life Science Institute, Virginia Tech, Blacksburg, VA, USA. Department of Entomology, Virginia Tech, Blacksburg, VA, USA. ; Department of Biochemistry, Virginia Tech, Blacksburg, VA, USA. Fralin Life Science Institute, Virginia Tech, Blacksburg, VA, USA. ; Department of Biochemistry, Virginia Tech, Blacksburg, VA, USA. ; School of Public Health and Tropical Medicine, Southern Medical University, Guangdong, People's Republic of China. ; Interdisciplinary PhD Program in Genetics, Bioinformatics, and Computational Biology, Virginia Polytechnic Institute and State University (Virginia Tech), Blacksburg, VA, USA. Fralin Life Science Institute, Virginia Tech, Blacksburg, VA, USA. Department of Entomology, Virginia Tech, Blacksburg, VA, USA. ; Interdisciplinary PhD Program in Genetics, Bioinformatics, and Computational Biology, Virginia Polytechnic Institute and State University (Virginia Tech), Blacksburg, VA, USA. Fralin Life Science Institute, Virginia Tech, Blacksburg, VA, USA. Department of Entomology, Virginia Tech, Blacksburg, VA, USA. jaketu@vt.edu zachadel@vt.edu. ; Interdisciplinary PhD Program in Genetics, Bioinformatics, and Computational Biology, Virginia Polytechnic Institute and State University (Virginia Tech), Blacksburg, VA, USA. Department of Biochemistry, Virginia Tech, Blacksburg, VA, USA. Fralin Life Science Institute, Virginia Tech, Blacksburg, VA, USA. jaketu@vt.edu zachadel@vt.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25999371" target="_blank"〉PubMed〈/a〉
    Keywords: Aedes/*genetics/*growth & development ; Animals ; Caspase 9 ; Clustered Regularly Interspaced Short Palindromic Repeats ; Female ; Gene Knockout Techniques ; *Genes, Insect ; *Genetic Loci ; Male ; Molecular Sequence Data ; Mosquito Control/methods ; Sex Determination Processes/*genetics
    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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    Control moment gyro optimization study (1966)
    In:  CASI
    Details
    Publication Date: 2019-05-29
    Description: Control moment gyro optimization
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-400
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  • 6
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    Adsorption of O2, SO2, and SO3 on nickel oxide. Mechanism for sulfate formation (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Calculations based on the atom superposition and electron delocalization molecular orbital (ASED-MO) technique suggest that O2 will adsorb perferentially end-on at an angle 45 deg from normal on a nickel cation site on the (100) surface of NiO. SO2 adsorption is also stronger on the nickel site; SO2 bonds through the sulfur atom is a plane perpendicular to the surface. Adsorption energies for SO3 on the nickel and oxygen sites are comparable in the perferred orientation in which the SO3 plane is parallel to the surface. On activation, SO3 adsorbed to an O2(-) site forms a trigonal pyramidal SO4 species which yields, with a low barrier, a tetrahedral sulfate anion. Subsequently the anion reorients on the surface. Possibilities for alternative mechanisms which require the formation of Ni3(+) or O2(-) are discussed. NiSO4 thus formed leads to the corrosion of Ni at high temperatures in the SO2+O2/SO3 The SO2+O2/SO3 atmosphere, as discussed in the experimental literature.
    Keywords: METALLIC MATERIALS
    Type: NASA-CR-176072 , NAS 1.26:176072
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  • 7
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    CO adsorption on (111) and (100) surfaces of the Pt sub 3 Ti alloy. Evidence for parallel binding and strong activation of CO (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The CO adsorption on a 40 atom cluster model of the (111) surface and a 36 atom cluster model of the (100) surface of the Pt3Ti alloy was studied. Parallel binding to high coordinate sites associated with Ti and low CO bond scission barriers are predicted for both surfaces. The binding of CO to Pt sites occurs in an upright orientation. These orientations are a consequence of the nature of the CO pi donation interactions with the surface. On the Ti sites the orbitals donate to the nearly empty Ti 3d band and the antibonding counterpart orbitals are empty. On the Pt sites, however, they are in the filled Pt 5d region of the alloy band, which causes CO to bond in a vertical orientation by 5 delta donation from the carbon end.
    Keywords: METALLIC MATERIALS
    Type: NASA-CR-176077 , NAS 1.26:176077
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  • 8
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    Why CO bonds side-on at low coverage and both side-on and upright at high coverage on the Cr(110) surface (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: An atom superposition and electron delocalization molecular orbital study of CO adsorption on the Cr(110) surface shows a high coordinate lying down orientation is favored. This is a result of the large number of empty d-band energy levels in chromium, which allows the antibonding counterparts to sigma and pi donation bonds to the surface to be empty. When lying down, backbonding to CO pi sup * orbitals is enhanced. Repulsive interactions cause additional CO to stand upright at 1/4 monolyer coverage. The results confirm the recent experimental study of Shinn and Madey.
    Keywords: METALLIC MATERIALS
    Type: NASA-CR-176071 , NAS 1.26:176071
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  • 9
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    Data user's note: Mariner 6 and 7 photographic data (NSSDC ID no. 69-014A-01 and 69-030A-01 (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The availability and assistance in the use of the complete set of Mariner 6 and 7 (1969 14A and 1969 20A) pictorial data are announced. The announcement describes the photographic mission of these Mariner spacecrafts, the television camera system, and the photographs that are available from the National Space Data Center. Two appendixes are included: one is a photographic catalog of all enhanced photographs, designated the maximum discriminability photographs; the other is a series of computer produced graphics that are useful in detailed analysis of the photographs.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-TM-X-68806 , NSSDC-71-09
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  • 10
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    Apollo 11 lunar photography (1970)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A data user's note is presented which announces the availability of the complete set of Apollo 11 pictorial data and aids investigators in the selection of Apollo 11 photographs for study. In addition, this note provides guidance in the interpretation of the photographs. As background information, brief descriptions of the Apollo 11 mission objectives, photographic equipment, and photographic coverage and quality are included. The National Space Science Data Center (NSSDC) can provide all forms of photographs described in the section on format of available data.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-TM-X-68802 , NSSDC-70-06
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