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  • Animals  (131)
  • LUNAR AND PLANETARY EXPLORATION  (61)
  • ASTRONOMY  (55)
  • Solar Physics
  • 1995-1999  (101)
  • 1980-1984  (179)
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Keywords
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Year
  • 1
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    Human cell hybrids: analysis of transformation and tumorigenicity (1982)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1982-01-15
    Description: Intraspecific human-human cell hybrids provide a stable model system with which to investigate the genetic control of transformed and tumorigenic phenotypes. Using this system it has been shown that these phenotypes are under separate genetic control. Furthermore, the tumorigenic phenotype can be complemented by fusion of different tumorigenic cells, resulting in nontumorigenic hybrids. This system also provides information on the control of differentiated function. Molecular cytogenetic techniques should reveal the nature of the chromosomal control of neoplastic transformation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Stanbridge, E J -- Der, C J -- Doersen, C J -- Nishimi, R Y -- Peehl, D M -- Weissman, B E -- Wilkinson, J E -- CA09054/CA/NCI NIH HHS/ -- CA19401/CA/NCI NIH HHS/ -- GM07134/GM/NIGMS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1982 Jan 15;215(4530):252-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7053574" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Division ; Cell Transformation, Neoplastic/*pathology ; Cell Transformation, Viral ; Cells, Cultured ; Fibronectins/metabolism ; Humans ; *Hybrid Cells/pathology ; Karyotyping ; Mice ; Mice, Nude ; Neoplasms/*genetics/pathology ; Neoplasms, Experimental/pathology ; Phenotype
    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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    The X-ray structure of Centaurus A (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: The Einstein X-ray observatory imaging detectors have found X-ray emission associated with several components of the nearby radio galaxy Cen A = NGC 5128: (1) the compact nucleus; (2) an X-ray jet pointed toward the NE radio lobes; (3) the middle NE radio lobe; (4) the disk or dust lane; and (5) diffuse emission extending several arcmin around the nucleus. The intensity of the nucleus changed by a factor of seven over six months. The X-ray jet is considered in terms of thermal, inverse Compton, and synchrotron models. The emission of the NE radio lobe is greater than that expected from inverse Compton or synchrotron processes. Two ridges of emission are found along each edge of the dust lane, within several arcmin of the nucleus. The diffuse X-ray component has a luminosity which is too high to be due to bulge population X-ray sources, but which may be produced by main sequence stars under appropriate circumstances.
    Keywords: ASTRONOMY
    Type: Astrophysical Journal; vol. 251
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Multiple and ancient origins of the domestic dog (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-06-13
    Description: Mitochondrial DNA control region sequences were analyzed from 162 wolves at 27 localities worldwide and from 140 domestic dogs representing 67 breeds. Sequences from both dogs and wolves showed considerable diversity and supported the hypothesis that wolves were the ancestors of dogs. Most dog sequences belonged to a divergent monophyletic clade sharing no sequences with wolves. The sequence divergence within this clade suggested that dogs originated more than 100,000 years before the present. Associations of dog haplotypes with other wolf lineages indicated episodes of admixture between wolves and dogs. Repeated genetic exchange between dog and wolf populations may have been an important source of variation for artificial selection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Vila, C -- Savolainen, P -- Maldonado, J E -- Amorim, I R -- Rice, J E -- Honeycutt, R L -- Crandall, K A -- Lundeberg, J -- Wayne, R K -- New York, N.Y. -- Science. 1997 Jun 13;276(5319):1687-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University of California, Los Angeles, CA 90095-1606, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9180076" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; *Biological Evolution ; Breeding ; Carnivora/*genetics ; Crosses, Genetic ; DNA, Mitochondrial/*genetics ; Dogs/classification/*genetics ; Female ; Haplotypes ; Male ; Molecular Sequence Data ; Phylogeny ; Sequence Homology, Nucleic Acid
    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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    Simultaneous X-ray and optical observations of the 7.7 second X-ray pulsar 4U 1626-67 (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Simultaneous X-ray and optical observations of the 7.7-s X-ray pulsar 4U 1626-67, obtained during May 29-31, 1978, reveal the presence of (1) intense, correlated optical and X-ray flares and (2) 7.7-s optical pulsations which agree in phase with the 1-3 keV X-ray pulsations to within 0.5 s (two standard deviations) and which agree in period to within 0.001 s (one standard deviation). From these data it is concluded that a substantial fraction (a minimum of 8%) and possibly all of the optical emission is produced from within approximately 0.5 light sec or 1.5 x 10 to the 10th cm of the neutron star. Furthermore, the data rule out the possibility that this optical emission comes from the X-ray heated surface of a degenerate or nondegenerate dwarf companion. It most likely comes from an accretion disk.
    Keywords: ASTRONOMY
    Type: Astrophysical Journal; vol. 235
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Optical identification of 2S 1417-62 (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The 17 s X-ray pulsar 2S 1417-62 has been identified with a V of approximately 16.9 mag OB star on the basis of an X-ray position obtained with the Einstein X-Ray Observatory and spectrophotometry with the 4-m telescope at Cerro Tololo Inter-American Observatory. Strong H-alpha emission is observed as well as significant changes in X-ray luminosity. The optical counterpart may be either a Be or a B I star, but the H-alpha emission strength and galactic position suggest that a Be star is more likely. A Be star identification also further supports the limit of approximately 15 days or more on the system binary period obtained by Kelley et al. (1981) from pulse timing studies.
    Keywords: ASTRONOMY
    Type: Astrophysical Journal, Part 1 (ISSN 0004-637X); 276; 621-624
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    NASA TECHNICAL REPORTS
  • 6
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    Reovirus therapy of tumors with activated Ras pathway (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-11-13
    Description: Human reovirus requires an activated Ras signaling pathway for infection of cultured cells. To investigate whether this property can be exploited for cancer therapy, severe combined immune deficient mice bearing tumors established from v-erbB-transformed murine NIH 3T3 cells or human U87 glioblastoma cells were treated with the virus. A single intratumoral injection of virus resulted in regression of tumors in 65 to 80 percent of the mice. Treatment of immune-competent C3H mice bearing tumors established from ras-transformed C3H-10T1/2 cells also resulted in tumor regression, although a series of injections were required. These results suggest that, with further work, reovirus may have applicability in the treatment of cancer.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Coffey, M C -- Strong, J E -- Forsyth, P A -- Lee, P W -- New York, N.Y. -- Science. 1998 Nov 13;282(5392):1332-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cancer Biology Research Group and Department of Microbiology and Infectious Diseases, University of Calgary Health Science Centre, Calgary, Alberta, T2N 4N1, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9812900" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Animals ; Antibodies, Viral/immunology ; Calcium-Calmodulin-Dependent Protein Kinases/metabolism ; Cell Line, Transformed ; Genes, erbB ; *Genes, ras ; Humans ; Male ; Mammalian orthoreovirus 3/immunology/*physiology ; Mice ; Mice, Inbred C3H ; Mice, SCID ; Neoplasm Transplantation ; Neoplasms, Experimental/metabolism/pathology/*therapy/virology ; Signal Transduction ; Tumor Cells, Cultured ; Virus Replication ; ras Proteins/*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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  • 7
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    Proofreading and aminoacylation of tRNAs before export from the nucleus (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-12-16
    Description: After synthesis and processing in the nucleus, mature transfer RNAs (tRNAs) are exported to the cytoplasm in a Ran.guanosine triphosphate-dependent manner. Export of defective or immature tRNAs is avoided by monitoring both structure and function of tRNAs in the nucleus, and only tRNAs with mature 5' and 3' ends are exported. All tRNAs examined can be aminoacylated in nuclei of Xenopus oocytes, thereby providing a possible mechanism for functional proofreading of newly made tRNAs. Inhibition of aminoacylation of a specific tRNA retards its appearance in the cytoplasm, indicating that nuclear aminoacylation promotes efficient export.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lund, E -- Dahlberg, J E -- GM30220/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1998 Dec 11;282(5396):2082-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biomolecular Chemistry, University of Wisconsin-Madison, 1300 University Avenue, Madison, WI 53-706, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9851929" target="_blank"〉PubMed〈/a〉
    Keywords: Acylation ; Animals ; Biological Transport ; Cell Nucleus/*metabolism ; Cytoplasm/metabolism ; Introns ; Nucleic Acid Conformation ; Oocytes ; RNA Precursors/chemistry/*metabolism ; RNA Processing, Post-Transcriptional ; RNA Splicing ; RNA, Transfer/chemistry/*metabolism ; RNA, Transfer, Amino Acid-Specific ; RNA, Transfer, Amino Acyl/chemistry/*metabolism ; RNA, Transfer, Met/chemistry/metabolism ; RNA, Transfer, Tyr/chemistry/metabolism ; Templates, Genetic ; Xenopus laevis
    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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    The promise of comparative genomics in mammals (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-16
    Description: Dense genetic maps of human, mouse, and rat genomes that are based on coding genes and on microsatellite and single-nucleotide polymorphism markers have been complemented by precise gene homolog alignment with moderate-resolution maps of livestock, companion animals, and additional mammal species. Comparative genetic assessment expands the utility of these maps in gene discovery, in functional genomics, and in tracking the evolutionary forces that sculpted the genome organization of modern mammalian species.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Brien, S J -- Menotti-Raymond, M -- Murphy, W J -- Nash, W G -- Wienberg, J -- Stanyon, R -- Copeland, N G -- Jenkins, N A -- Womack, J E -- Marshall Graves, J A -- New York, N.Y. -- Science. 1999 Oct 15;286(5439):458-62, 479-81.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Genomic Diversity, National Cancer Institute, Frederick, MD 21702-1201, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10521336" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Domestic/genetics ; Base Sequence ; *Chromosome Mapping ; *Evolution, Molecular ; Genetic Markers ; *Genome ; *Genome, Human ; Humans ; Mammals/*genetics ; Mutation ; *Phylogeny ; Rodentia/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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  • 9
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    What maintains memories? (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-01-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lisman, J E -- Fallon, J R -- P01 NS039321/NS/NINDS NIH HHS/ -- R01 HD023924/HD/NICHD NIH HHS/ -- R01 HD052083/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1999 Jan 15;283(5400):339-40.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Brandeis University, Waltham, MA 02254, USA. lisman@binah.cc.brandeis.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9925495" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/*physiology ; Calcium/metabolism ; Calcium-Calmodulin-Dependent Protein Kinase Type 2 ; Calcium-Calmodulin-Dependent Protein Kinases/metabolism ; Computer Simulation ; Enzyme Activation ; Feedback ; Gene Expression ; Long-Term Potentiation ; Memory/*physiology ; Models, Neurological ; Phosphorylation ; Protein Biosynthesis ; Protein Kinase C/metabolism ; RNA, Messenger/metabolism ; Second Messenger Systems ; Synapses/*physiology
    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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    Field primatology and biomedical research (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-04-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Phillips-Conroy, J E -- Jolly, C J -- New York, N.Y. -- Science. 1999 Apr 2;284(5411):50.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10215529" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/virology ; Animals ; Ape Diseases/virology ; Cercopithecus aethiops/*virology ; Ethiopia ; Pan troglodytes/virology ; Papio/*virology ; Research ; Sampling Studies ; Simian Acquired Immunodeficiency Syndrome/transmission/*virology ; Tanzania
    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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