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  • Animals  (650)
  • STRUCTURAL MECHANICS  (395)
  • 1985-1989  (1,045)
  • 1
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    Gene transfer and molecular cloning of the human NGF receptor (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-04-25
    Description: Nerve growth factor (NGF) and its receptor are important in the development of cells derived from the neural crest. Mouse L cell transformants have been generated that stably express the human NGF receptor gene transfer with total human DNA. Affinity cross-linking, metabolic labeling and immunoprecipitation, and equilibrium binding with 125I-labeled NGF revealed that this NGF receptor had the same size and binding characteristics as the receptor from human melanoma cells and rat PC12 cells. The sequences encoding the NGF receptor were molecularly cloned using the human Alu repetitive sequence as a probe. A cosmid clone that contained the human NGF receptor gene allowed efficient transfection and expression of the receptor.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chao, M V -- Bothwell, M A -- Ross, A H -- Koprowski, H -- Lanahan, A A -- Buck, C R -- Sehgal, A -- NS-17551/NS/NINDS NIH HHS/ -- NS-23343-01/NS/NINDS NIH HHS/ -- NS21072/NS/NINDS NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1986 Apr 25;232(4749):518-21.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3008331" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Cell Transformation, Neoplastic/drug effects ; *Cloning, Molecular ; DNA, Recombinant ; Genes ; Humans ; Melanoma/metabolism ; Mice ; Oncogenes ; Rats ; Receptors, Cell Surface/*genetics ; Receptors, Nerve Growth Factor ; Repetitive Sequences, Nucleic Acid ; Tunicamycin/pharmacology
    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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    Synapsins: mosaics of shared and individual domains in a family of synaptic vesicle phosphoproteins (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-09-29
    Description: Synapsins are neuronal phosphoproteins that coat synaptic vesicles, bind to the cytoskeleton, and are believed to function in the regulation of neurotransmitter release. Molecular cloning reveals that the synapsins comprise a family of four homologous proteins whose messenger RNA's are generated by differential splicing of transcripts from two genes. Each synapsin is a mosaic composed of homologous amino-terminal domains common to all synapsins and different combinations of distinct carboxyl-terminal domains. Immunocytochemical studies demonstrate that all four synapsins are widely distributed in nerve terminals, but that their relative amounts vary among different kinds of synapses. The structural diversity and differential distribution of the four synapsins suggest common and different roles of each in the integration of distinct signal transduction pathways that modulate neurotransmitter release in various types of neurons.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sudhof, T C -- Czernik, A J -- Kao, H T -- Takei, K -- Johnston, P A -- Horiuchi, A -- Kanazir, S D -- Wagner, M A -- Perin, M S -- De Camilli, P -- AA 06944/AA/NIAAA NIH HHS/ -- MH 39327/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1989 Sep 29;245(4925):1474-80.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Dallas, TX.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2506642" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Base Sequence ; Molecular Sequence Data ; Nerve Tissue Proteins/*genetics ; Neuropeptides/*genetics ; Phosphoproteins/*genetics ; Sequence Homology, Nucleic Acid ; Structure-Activity Relationship ; Synapsins ; Synaptic Vesicles/*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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  • 3
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    Thymic requirement for clonal deletion during T cell development (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-11-24
    Description: During T cell differentiation, self tolerance is established in part by the deletion of self-reactive T cells within the thymus (negative selection). The presence of T cell receptor (TCR)-alpha beta + T cells in older athymic (nu/nu) mice indicates that some T cells can also mature without thymic influence. Therefore, to determine whether the thymus is required for negative selection, TCR V beta expression was compared in athymic nu/nu mice and their congenic normal littermates. T cells expressing V beta 3 proteins are specific for minor lymphocyte stimulatory (Mlsc) determinants and are deleted intrathymically due to self tolerance in Mlsc+ mouse strains. Here it is shown that V beta 3+ T cells are deleted in Mlsc+ BALB/c nu/+ mice, but not in their BALB/c nu/nu littermates. Thus, the thymus is required for clonal deletion during T cell development.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fry, A M -- Jones, L A -- Kruisbeek, A M -- Matis, L A -- New York, N.Y. -- Science. 1989 Nov 24;246(4933):1044-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Biologics Evaluation and Research, Food and Drug Administration, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2511630" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD4/genetics ; Antigens, CD8 ; Antigens, Differentiation, T-Lymphocyte/genetics ; Flow Cytometry ; Gene Expression ; Macromolecular Substances ; Mice ; Mice, Inbred BALB C ; Mice, Inbred Strains ; Mice, Nude ; Receptors, Antigen, T-Cell/genetics ; T-Lymphocytes/*immunology ; Thymus Gland/*immunology
    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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    Expression of the murine Duchenne muscular dystrophy gene in muscle and brain (1988)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1988-03-18
    Description: Complementary DNA clones were isolated that represent the 5' terminal 2.5 kilobases of the murine Duchenne muscular dystrophy (Dmd) messenger RNA (mRNA). Mouse Dmd mRNA was detectable in skeletal and cardiac muscle and at a level approximately 90 percent lower in brain. Dmd mRNA is also present, but at much lower than normal levels, in both the muscle and brain of three different strains of dystrophic mdx mice. The identification of Dmd mRNA in brain raises the possibility of a relation between human Duchenne muscular dystrophy (DMD) gene expression and the mental retardation found in some DMD males. These results also provide evidence that the mdx mutations are allelic variants of mouse Dmd gene mutations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chamberlain, J S -- Pearlman, J A -- Muzny, D M -- Gibbs, R A -- Ranier, J E -- Caskey, C T -- Reeves, A A -- New York, N.Y. -- Science. 1988 Mar 18;239(4846):1416-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Molecular Genetics, Baylor College of Medicine, Houston, TX 77030.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3347839" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/*metabolism ; DNA/genetics ; DNA, Recombinant ; *Gene Expression Regulation ; Intellectual Disability/genetics ; Mice ; Mice, Inbred ICR ; Mice, Mutant Strains ; Muscles/*metabolism ; Muscular Dystrophy, Animal/*genetics ; Mutation ; Nucleic Acid Hybridization ; RNA, Messenger/metabolism ; Ribonuclease, Pancreatic/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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  • 5
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    Regulation by growth hormone of number of chondrocytes containing IGF-I in rat growth plate (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-08-01
    Description: Whether growth hormone stimulates longitudinal bone growth by a direct effect at the site of the growth plate or indirectly by increasing the concentration of circulating somatomedins (insulin-like growth factors) has been the subject of controversy. Immunohistochemical methods were used to explore the localization and distribution of insulin-like growth factor I (IGF-I) immunoreactivity in the epiphyseal growth plate of the proximal tibia of male rats. Cells in the proliferative zone of the growth plate of normal rats exhibited a bright immunofluorescence, whereas cells in the germinal and hypertrophic zones stained only weakly. In rats subjected to hypophysectomy, the number of fluorescent cells was markedly reduced. When the hypophysectomized rats were treated with growth hormone, either systemically or at the site of the growth plate, the number of IGF-I-immunoreactive cells in the proliferative zone was increased. The results show that IGF-I is produced in proliferative chondrocytes in the growth plate and that the number of IGF-I-containing cells is directly regulated by growth hormone. These findings suggest that IGF-I has a specific role in the clonal expansion of differentiated chondrocytes and exerts its function locally through autocrine or paracrine mechanisms.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nilsson, A -- Isgaard, J -- Lindahl, A -- Dahlstrom, A -- Skottner, A -- Isaksson, O G -- New York, N.Y. -- Science. 1986 Aug 1;233(4763):571-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3523759" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Fluorescent Antibody Technique ; Growth Hormone/pharmacology/*physiology ; Growth Plate/*cytology/drug effects/growth & development ; Hypophysectomy ; Insulin-Like Growth Factor I/pharmacology/*physiology ; Male ; Rats ; Rats, Inbred Strains ; Somatomedins/*physiology ; Tibia
    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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    Deficit of spinal cord glycine/strychnine receptors in inherited myoclonus of Poll Hereford calves (1988)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1988-09-30
    Description: Inherited myoclonus of Poll Hereford calves is characterized by hyperesthesia and myoclonic jerks of the skeletal musculature, which occur spontaneously and in response to sensory stimuli. The disease shows autosomal recessive inheritance, and significant proportions of the Poll Hereford herds in many countries are thought to be carriers of the mutant gene. Studies revealed a specific and marked (90 to 95 percent) deficit in [3H]strychnine binding sites in spinal cord membranes from myoclonic animals compared to controls, reflecting a loss of, or defect in, glycine/strychnine receptors. Spinal cord synaptosomes prepared from affected animals showed a significantly increased ability to accumulate [3H]glycine, indicating an increased capacity of the high-affinity neuronal uptake system for glycine. In contrast, stimulus-induced glycine release and spinal cord glycine concentrations were unaltered.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gundlach, A L -- Dodd, P R -- Grabara, C S -- Watson, W E -- Johnston, G A -- Harper, P A -- Dennis, J A -- Healy, P J -- New York, N.Y. -- Science. 1988 Sep 30;241(4874):1807-10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology, University of Sydney, N.S.W., Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2845573" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acids/metabolism ; Animals ; Cattle ; Cattle Diseases/genetics/physiopathology ; Myoclonus/genetics/physiopathology/*veterinary ; Receptors, Glycine ; Receptors, Neurotransmitter/*deficiency ; Spinal Cord/*physiopathology
    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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    A glycophospholipid tail at the carboxyl terminus of the Thy-1 glycoprotein of neurons and thymocytes (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-11-29
    Description: Cell surface molecules of eukaryotic cells have been considered to be integrated into the membrane bilayer by a transmembrane protein sequence. The Thy-1 antigen of rodent thymocytes and brain was the first eukaryotic membrane molecule for which biochemical data clearly suggested membrane integration via a nonprotein tail. Direct evidence is now presented showing that a glycophospholipid structure is attached to the carboxyl-terminal cysteine residue and that 31 carboxyl-terminal amino acids predicted from the Thy-1 complementary DNA sequence are not present in the mature glycoprotein. These experimental results raise questions concerning signaling across a cell membrane since antibodies to Thy-1 can stimulate T lymphocytes to release lymphokines and undergo cell division.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tse, A G -- Barclay, A N -- Watts, A -- Williams, A F -- New York, N.Y. -- Science. 1985 Nov 29;230(4729):1003-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2865810" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; *Antigens, Surface/isolation & purification ; Antigens, Thy-1 ; Brain/*metabolism ; Ethanolamines/metabolism ; Galactosamine/metabolism ; Glucosamine/metabolism ; Glycolipids/*metabolism ; Membrane Proteins/*metabolism ; Nerve Tissue Proteins/*metabolism ; Rats ; Stearic Acids/metabolism ; T-Lymphocytes/*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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  • 8
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    Nucleotide sequence of a bovine clone encoding the angiogenic protein, basic fibroblast growth factor (1986)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1986-08-01
    Description: Basic and acidic fibroblast growth factors (FGF's) are potent mitogens for capillary endothelial cells in vitro, stimulate angiogenesis in vivo, and may participate in tissue repair. An oligonucleotide probe for bovine basic FGF was designed from the nucleotide sequence of the amino-terminal exon of bovine acidic FGF, taking into account the 55 percent amino acid sequence homology between the two factors. With this oligonucleotide probe, a full length complementary DNA for basic FGF was isolated from bovine pituitary. Basic FGF in bovine hypothalamus was shown to be encoded by a single 5.0-kilobase messenger RNA; in a human hepatoma cell line, both 4.6- and 2.2-kilobase basic FGF messenger RNA's were present. Both growth factors seem to be synthesized with short amino-terminal extensions that are not found on the isolated forms for which the amino acid sequences have been determined. Neither basic nor acidic FGF has a classic signal peptide.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Abraham, J A -- Mergia, A -- Whang, J L -- Tumolo, A -- Friedman, J -- Hjerrild, K A -- Gospodarowicz, D -- Fiddes, J C -- New York, N.Y. -- Science. 1986 Aug 1;233(4763):545-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2425435" target="_blank"〉PubMed〈/a〉
    Keywords: Angiogenesis Inducing Agents/*genetics ; Animals ; Base Sequence ; Cattle ; Cloning, Molecular ; Fibroblast Growth Factors/*genetics/pharmacology ; Growth Substances/*genetics ; Neovascularization, Pathologic
    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 effect of a small initial curvature on the free vibration of clamped, rectangular plates (1986)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: An analytical method of obtaining the natural frequencies and mode shapes of clamped, rectangular plates having a small initial curvature is presented. Specifically, the singular perturbation technique is used to reduce the fourth-order plate vibration problem to the simpler membrane problem with modified boundary conditions that account for the bending effects. The eigenfrequencies for plates with inverse aspect ratios varying between 0.1 and 1.0 and for the dimensionless normal prestress between 0.1 and 1.0 have been presented for values of epsilon, the normalized bending rigidity, ranging between 0.0010 and 0.2500. It is established that a small initial curvature has no effect on the frequency of vibration of the plate. However, its effect is manifested in the eigenmodes.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-CR-178964 , NAS 1.26:178964
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    NASA TECHNICAL REPORTS
  • 10
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    Free vibration of rectangular plates with a small initial curvature (1988)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The method of matched asymptotic expansions is used to solve the transverse free vibration of a slightly curved, thin rectangular plate. Analytical results for natural frequencies and mode shapes are presented in the limit when the dimensionless bending rigidity, epsilon, is small compared with in-plane forces. Results for different boundary conditions are obtained when the initial deflection is: (1) a polynomial in both directions, and (2) the product of a polynomial and a trigonometric function, and arbitrary. For the arbitrary initial deflection case, the Fourier series technique is used to define the initial deflection. The results obtained show that the natural frequencies of vibration of slightly curved plates are coincident with those of perfectly flat, prestressed rectangular plates. However, the eigenmodes are very different from those of initially flat prestressed rectangular plates. The total deflection is found to be the sum of the initial deflection, the deflection resulting from the solution of the flat plate problem, and the deflection resulting from the static problem.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-CR-179370 , NAS 1.26:179370
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    NASA TECHNICAL REPORTS
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