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  • ASTROPHYSICS  (162)
  • Life and Medical Sciences  (157)
  • Humans  (101)
  • INSTRUMENTATION AND PHOTOGRAPHY  (69)
  • Condensed Matter: Electronic Properties, etc.
  • Lunar and Planetary Science and Exploration
  • 2015-2019
  • 1990-1994  (489)
  • 1992  (489)
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  • 2015-2019
  • 1990-1994  (489)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Isolation and cultivation of blastocyst-derived stem cell lines from american mink (Mustela vison) (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Molecular Reproduction and Development 33 (1992), S. 418-431 
    Details
    ISSN: 1040-452X
    Keywords: Embryonic stem cells ; Cell differentiation ; Pluripotency ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Ten embryonic stem (ES) cell lines from mink blastocysts were isolated and characterized. All the lines had a normal diploid karyotype; of the ten lines studied, five had the XX and five had the XY constitution. Testing of the pluripotency of the ES-like cells demonstrated that (1) among four lines of genotype XX, an X was late-replicating in three; both Xs were active in about one-third of cells of line MES8, and analysis of glucose-6-phosphate dehydrogenase revealed no dosage compensation for the X-linked gene; (2) when cultured in suspension, the majority of lines were capable of forming “simple” embryoid bodies (EB), and two only showed the capacity for forming “cystic” multilayer EBs. However, formation of ectoderm or foci of yolk sac hematopoiesis, a feature of mouse ES ceils, was not observed in the “cystic” EB; (3) when cultured as a monolayer without feeder, the ES cells differentiated into either vimentin-positive fibroblast-like cells or cytokeratin-positive epithelial-like cells (less frequently); neural cells appeared in two lines; (4) when injected into athymic mice, only one of the four tested lines gave rise to tumors. These were fibrosarcomas composed of fibrobalst-like cells, with an admixture of smooth muscular elements and stray islets of epithelial tissue; (5) when the ES cells of line MES1 were injected into 102 blastocyst cavities and subsequently transplanted into foster mathers, we obtained 30 offspring. Analysis of the biochemical markers and coat color did not demonstrate the presence of chimaeras among offspring. Thus the cell lines derived from mink blastocysts are true ES cells. However, their pluripotential capacities are restricted. © 1992 Wiley-Liss, Inc.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrd.1080330408
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  • 2
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    Selective transmission of human immunodeficiency virus type-1 variants from mothers to infants (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-02-28
    Description: Multiple human immunodeficiency virus type-1 sequences from the V3 and V4-V5 regions of the envelope gene were analyzed from three mother-infant pairs. The infants' viral sequences were less diverse than those of their mothers. In two pairs, a proviral form infrequently found in the mother predominated in her infant. A conserved N-linked glycosylation site within the V3 region, present in each mother's sequence set, was absent in all of the infants' sequence sets. These findings demonstrate that a minor subset of maternal virus is transmitted to the infant.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wolinsky, S M -- Wike, C M -- Korber, B T -- Hutto, C -- Parks, W P -- Rosenblum, L L -- Kunstman, K J -- Furtado, M R -- Munoz, J L -- AI-32535/AI/NIAID NIH HHS/ -- HD26619-01/HD/NICHD NIH HHS/ -- P01-25569/PHS HHS/ -- New York, N.Y. -- Science. 1992 Feb 28;255(5048):1134-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Northwestern University Medical School, Chicago, IL 60611.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1546316" target="_blank"〉PubMed〈/a〉
    Keywords: Acquired Immunodeficiency Syndrome/congenital/microbiology/*transmission ; Amino Acid Sequence ; Base Sequence ; Female ; Genotype ; Glycosylation ; HIV Antigens/genetics ; HIV Envelope Protein gp120/genetics/immunology ; HIV-1/*genetics/immunology ; Humans ; Infant ; Maternal-Fetal Exchange ; Molecular Sequence Data ; Oligodeoxyribonucleotides/chemistry ; Polymerase Chain Reaction ; Pregnancy ; Selection, Genetic ; Sequence Alignment
    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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    Interleukin-8 as a macrophage-derived mediator of angiogenesis (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-12-11
    Description: Angiogenic factors produced by monocytes-macrophages are involved in the pathogenesis of chronic inflammatory disorders characterized by persistent angiogenesis. The possibility was tested that interleukin-8 (IL-8), which is a cytokine that is chemotactic for lymphocytes and neutrophils, is also angiogenic. Human recombinant IL-8 was potently angiogenic when implanted in the rat cornea and induced proliferation and chemotaxis of human umbilical vein endothelial cells. Angiogenic activity present in the conditioned media of inflamed human rheumatoid synovial tissue macrophages or lipopolysaccharide-stimulated blood monocytes was equally blocked by antibodies to either IL-8 or tumor necrosis factor-alpha. An IL-8 antisense oligonucleotide specifically blocked the production of monocyte-induced angiogenic activity. These data suggest a function for macrophage-derived IL-8 in angiogenesis-dependent disorders such as rheumatoid arthritis, tumor growth, and wound repair.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koch, A E -- Polverini, P J -- Kunkel, S L -- Harlow, L A -- DiPietro, L A -- Elner, V M -- Elner, S G -- Strieter, R M -- AR30692/AR/NIAMS NIH HHS/ -- AR41492/AR/NIAMS NIH HHS/ -- HL39926/HL/NHLBI NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1992 Dec 11;258(5089):1798-801.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Northwestern University Medical School, Chicago, IL 60611.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1281554" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Arthritis, Rheumatoid/physiopathology ; Base Sequence ; Cell Division/drug effects ; Cells, Cultured ; Chemotaxis/*drug effects ; Cornea/*drug effects/physiology ; Dose-Response Relationship, Drug ; Endothelium, Vascular/drug effects/*physiology ; Fibroblast Growth Factor 2/pharmacology ; Humans ; Interleukin-8/genetics/*pharmacology ; Macrophages/*physiology ; Mice ; Molecular Sequence Data ; Monocytes/physiology ; *Neovascularization, Pathologic ; Oligonucleotides, Antisense/*pharmacology ; Rabbits ; Rats ; Recombinant Proteins/pharmacology ; Synovial Fluid/physiology ; Tumor Necrosis Factor-alpha/genetics ; Umbilical Veins
    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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    Cellular proteins bound to immunodeficiency viruses: implications for pathogenesis and vaccines (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-12-28
    Description: Cellular proteins associated with immunodeficiency viruses were identified by determination of the amino acid sequence of the proteins and peptides present in sucrose density gradient-purified human immunodeficiency virus (HIV)-1, HIV-2, and simian immunodeficiency virus (SIV). beta 2 microglobulin (beta 2m) and the alpha and beta chains of human lymphocyte antigen (HLA) DR were present in virus preparations at one-fifth the concentration of Gag on a molar basis. Antisera to HLA DR, beta 2 m, as well as HLA class I precipitated intact viral particles, suggesting that these cellular proteins were physically associated with the surface of the virus. Antisera to class I, beta 2m, and HLA DR also inhibited infection of cultured cells by both HIV-1 and SIV. The specific, selective association of these cellular proteins in a physiologically relevant manner has major implications for our understanding of the infection process and the pathogenesis of immunodeficiency viruses and should be considered in the design of vaccines.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Arthur, L O -- Bess, J W Jr -- Sowder, R C 2nd -- Benveniste, R E -- Mann, D L -- Chermann, J C -- Henderson, L E -- N01-CO-74102/CO/NCI NIH HHS/ -- New York, N.Y. -- Science. 1992 Dec 18;258(5090):1935-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉AIDS Vaccine Program, National Cancer Institute, Frederick Cancer Research and Development Center NCI-FCRDC, MD 21702.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1470916" target="_blank"〉PubMed〈/a〉
    Keywords: *AIDS Vaccines ; Centrifugation, Density Gradient ; Chromatography, High Pressure Liquid ; Gene Products, gag/analysis ; HIV-1/*immunology/isolation & purification/physiology ; HIV-2/*immunology/isolation & purification/physiology ; HLA-DR Antigens/isolation & purification/*metabolism ; Humans ; Immune Sera ; Lymphocytes/*immunology ; Neutralization Tests ; Simian Immunodeficiency Virus/*immunology/isolation & purification/physiology ; beta 2-Microglobulin/isolation & purification/*metabolism
    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
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    Cytochrome b558: the flavin-binding component of the phagocyte NADPH oxidase (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-06-05
    Description: The phagocyte respiratory burst oxidase is a flavin-adenine dinucleotide (FAD)-dependent dehydrogenase and an electron transferase that reduces molecular oxygen to superoxide anion, a precursor of microbicidal oxidants. Several proteins required for assembly of the oxidase have been characterized, but the identity of its flavin-binding component has been unclear. Oxidase activity was reconstituted in vitro with only the purified oxidase proteins p47phox, p67phox, Rac-related guanine nucleotide (GTP)-binding proteins, and membrane-bound cytochrome b558. The reconstituted oxidase required added FAD, and FAD binding was localized to cytochrome b558. Alignment of the amino acid sequence of the beta subunit of cytochrome b558 (gp91phox) with other flavoproteins revealed similarities to the nicotinamide adenine dinucleotide phosphate (reduced) (NADPH)-binding domains. Thus flavocytochrome b558 is the only obligate electron transporting component of the NADPH oxidase.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rotrosen, D -- Yeung, C L -- Leto, T L -- Malech, H L -- Kwong, C H -- New York, N.Y. -- Science. 1992 Jun 5;256(5062):1459-62.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Host Defenses, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1318579" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Binding Sites ; Cell Line ; Cell-Free System ; Cytochrome b Group/*blood/genetics/isolation & purification ; Ferredoxin-NADP Reductase/genetics/metabolism ; Humans ; Insects ; Molecular Sequence Data ; NADH, NADPH Oxidoreductases/*blood/genetics/isolation & purification ; NADP/metabolism ; NADPH Oxidase ; Neutrophils/*enzymology ; Phagocytes/*enzymology ; Plants/enzymology ; Recombinant Proteins/chemistry/metabolism ; Sequence Homology, Nucleic Acid ; Superoxides/blood ; Transfection
    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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    Genetic linkage evidence for a familial Alzheimer's disease locus on chromosome 14 (1992)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1992-10-23
    Description: Linkage analysis was used to search the genome for chromosomal regions harboring familial Alzheimer's disease genes. Markers on chromosome 14 gave highly significant positive lod scores in early-onset non-Volga German kindreds; a Zmax of 9.15 (theta = 0.01) was obtained with the marker D14S43 at 14q24.3. One early-onset family yielded a lod score of 4.89 (theta = 0.0). When no assumptions were made about age-dependent penetrance, significant results were still obtained (Zmax = 5.94, theta = 0.0), despite the loss of power to detect linkage under these conditions. Results for the Volga German families were either negative or nonsignificant for markers in this region. Thus, evidence indicates a familial Alzheimer's disease locus on chromosome 14.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schellenberg, G D -- Bird, T D -- Wijsman, E M -- Orr, H T -- Anderson, L -- Nemens, E -- White, J A -- Bonnycastle, L -- Weber, J L -- Alonso, M E -- AG08017/AG/NIA NIH HHS/ -- HG00248/HG/NHGRI NIH HHS/ -- R01MH43240/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1992 Oct 23;258(5082):668-71.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/1411576" target="_blank"〉PubMed〈/a〉
    Keywords: Alzheimer Disease/*genetics ; Base Sequence ; *Chromosomes, Human, Pair 14 ; Female ; Genetic Linkage/*genetics ; Humans ; Male ; Molecular Sequence Data ; Oligonucleotide Probes/genetics ; Pedigree
    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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  • 7
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    Stardust: Studies in microgravity of condensation and agglomeration of cosmic dust analogue (1992)
    In:  CASI
    Details
    Publication Date: 2013-08-29
    Description: A short description of the program Stardust whose goal is to study the formation and properties of high temperature particles and gases, including silicate and carbonaceous materials, that are of interest in astrophysics and planetary science, is given. The international program was carried out in microgravity conditions in parabolic flight. A description of the laboratory equipment, conceived to perform experimental tests in reduced gravity conditions, and which is based on the gas evaporation technique, is given. The gas evaporation technique utilizes one or more heated crucible to vaporize solids materials (SiO, Mg) in a low pressure of inert or reactive gas inside of a vacuum bell jar. The vapor pressures of the materials are controlled by the temperature of the crucibles. The temperature and pressure of inert gas are also controlled. By varying the vapor pressure relative to the gas temperature and pressure, the conditions for substantial grain condensation can be controlled and grain formation measured using light scattering techniques. Thus the partial pressure for grain condensation, can be measured as a function of temperature. The gas evaporation technique has the advantage that complex chemical systems can be studied by using multiple crucibles each containing solid source material. Experimental results and future trends are addressed.
    Keywords: ASTROPHYSICS
    Type: ESA, Environment Observation and Climate Modelling Through International Space Projects. Columbus Eight (COSY-8): Utilisation of Earth Orbiting Laboratories; p 325-329
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    NASA TECHNICAL REPORTS
  • 8
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    Cosmic dust analogue material condensation in microgravity: The Stardust programme - First results and future activities (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Initial results are presented from airborne experiments investigating the vapor phase condensation in microgravity, carried out in the framework of the Stardust international program. Special attention is given to the design and operation of the experimental equipment, which includes the furnace for producing vapors from different materials and the cloud chamber in which the vapor nucleation occurs. A two-part mathematical model was developed to describe the transport processes in the nucleation chamber. Results obtained from three experimental series were conducted with Mg and Zn aboard NASA's KC-135 reduced-gravity research aircraft showed that nucleation front (smoke cloud) was quite different in appearance in microgravity from that typically observed at 1-g condition. The Mg and Zn particles exhibited significant differences in shape; there was some evidence of coagulation.
    Keywords: ASTROPHYSICS
    Type: IAF PAPER 92-0933
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  • 9
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    A radio optical reference frame. III - Additional radio and optical positions in the Southern Hemisphere (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Radio and optical positions are presented for southern hemisphere extragalactic sources from the Parkes 2.7 GHz survey. Sixty-one sources were observed with Mark III VLBI at 8.4 GHz between Tidbinbilla, Australia, and Hartebeesthoek, South Africa. The results presented are part of the effort to establish a global reference frame of 400 extragalactic radio sources. Radio positions with about 10 milliarcsec errors have been estimated for 39 sources not previously in the present radio reference frame catalog, and provisional positions were obtained for two additional sources, bringing the total number of catalog sources to 276. The principal source of error is the uncalibrated ionosphere. Of the remaining sources five were completely undetected, six were either too faint or too resolved, and nine had previous catalog positions. Optical positions on the FK5 system have also been measured for four southern sources using prime focus plates from the Anglo-Australian 4 m telescope with an accuracy of 0.06 arcsec. This raises to 40 the number of radio sources with accurately measured positions for their optical counterparts.
    Keywords: ASTROPHYSICS
    Type: Astronomical Journal (ISSN 0004-6256); 103; 6 Ju
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  • 10
    Electronic Resource
    Electronic Resource
    Actin dynamics during the cell cycle in Chlamydomonas reinhardtii (1992)
    New York, NY : Wiley-Blackwell
    Cell Motility and the Cytoskeleton 22 (1992), S. 117-126 
    Details
    ISSN: 0886-1544
    Keywords: algae ; cell division ; cytokinesis ; mitosis ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: We have used two monoclonal antibodies to demonstrate the presence and localization of actin in interphase and mitotic vegetative cells of the green alga Chlamydomonas reinhardtii. Commercially available monoclonal antibodies raised against smooth muscle actin (Lessard: Cell Motil. Cytoskeleton 10:349-362, 1988; Lin: Proc. Natl. Acad. Sci. USA 78:2335-2339, 1981) identify Chlamydomonasactin as a ∼43,000-Mr protein by Western immunoblot procedures. In an earlier study, Detmers and coworkers (Cell Motil. 5:415-430, 1985) first identified Chlamydomonas actin using NBD-phallacidin and an antibody raised against Dictyostelium actin; they demonstrated that F-actin is localized in the fertilization tubule of mating gametes. Here, we show by immunofluorescence that vegetative Chlamydomonas cells have an array of actin that surrounds the nucleus in interphase cells and undergoes dramatic reorganization during mitosis and cytokinesis. This includes the following: reorganization of actin to the ante- rior of the cell during preprophase; the formation of a cruciate actin band in prophase; reorganization to a single anterior actin band in metaphase; rearrange- ment forming a focus of actin anterior to the metaphase plate; reextension of the actin band in anaphase; presence of actin in the forming cleavage furrow during telophase and cytokinesis; and finally reestablishment of the interphase actin array. The studies presented here do not allow us to discriminate between G and F-actin. None the less, our observations, demonstrating dynamic reorganization of actin during the cell cycle, suggest a role for actin that may include the movement of basal bodies toward the spindle poles in mitosis and the formation of the cleavage furrow during cytokinesis. © 1992 Wiley-Liss, Inc.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cm.970220205
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