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  • Chemistry  (13)
  • AEROSPACE MEDICINE  (3)
  • Mutation
  • 1995-1999  (9)
  • 1970-1974  (5)
  • 1925-1929  (3)
  • 1900-1904  (1)
  • 1
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    How calcium enhances plant salt tolerance (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-07-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Epstein, E -- New York, N.Y. -- Science. 1998 Jun 19;280(5371):1906-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Land, Air and Water Resources-Soils and Biogeochemistry, Universsity of California at Davis 95616-8627, USA. eqepstein@ucdavis.e eqepstein@ucdavis.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9669949" target="_blank"〉PubMed〈/a〉
    Keywords: Arabidopsis/genetics/metabolism ; *Arabidopsis Proteins ; Calcium/*metabolism ; Genes, Plant ; Ion Transport ; Mutation ; Plant Proteins/chemistry/*genetics/*metabolism ; Plants/genetics/*metabolism ; Potassium/metabolism ; Second Messenger Systems ; Signal Transduction ; Sodium/metabolism/*pharmacology ; Water/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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    PAPER CURRENT
  • 2
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    Basal cell carcinomas in mice overexpressing sonic hedgehog (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-05-02
    Description: Mutations in the tumor suppressor gene PATCHED (PTC) are found in human patients with the basal cell nevus syndrome, a disease causing developmental defects and tumors, including basal cell carcinomas. Gene regulatory relationships defined in the fruit fly Drosophila suggest that overproduction of Sonic hedgehog (SHH), the ligand for PTC, will mimic loss of ptc function. It is shown here that transgenic mice overexpressing SHH in the skin develop many features of basal cell nevus syndrome, demonstrating that SHH is sufficient to induce basal cell carcinomas in mice. These data suggest that SHH may have a role in human tumorigenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Oro, A E -- Higgins, K M -- Hu, Z -- Bonifas, J M -- Epstein, E H Jr -- Scott, M P -- AR39959/AR/NIAMS NIH HHS/ -- New York, N.Y. -- Science. 1997 May 2;276(5313):817-21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Dermatology, Stanford University School of Medicine, Stanford, CA 94305-5427, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9115210" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Basal Cell Nevus Syndrome/*genetics/metabolism/pathology ; Carcinoma, Basal Cell/*genetics/metabolism/pathology ; Embryo, Mammalian ; *Gene Expression Regulation, Neoplastic ; Hedgehog Proteins ; Humans ; Intracellular Signaling Peptides and Proteins ; Keratinocytes/metabolism ; Male ; Membrane Proteins/genetics/metabolism ; Mice ; Mice, SCID ; Mice, Transgenic ; Mutation ; Neoplasm Transplantation ; Protein Biosynthesis ; Proteins/*genetics/metabolism ; Receptors, Cell Surface ; Skin/pathology ; Skin Neoplasms/*genetics/metabolism/pathology ; Skin Transplantation ; *Trans-Activators
    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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    Effect of prolonged space flight on cardiac function and dimensions (1974)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Echocardiographic studies were performed preflight 5 days before launch and on recovery day and 1, 2, 4, 11, 31 and 68 days postflight. From these echocardiograms measurements were made. From these primary measurements, left ventricular end-diastolic volume, end-systolic volume, stroke volume, and mass were derived using the accepted assumptions. Findings in the Scientist Pilot and Pilot resemble those seen in trained distance runners. Wall thickness measurements were normal in all three crewmembers preflight. Postflight basal studies were unchanged in the Commander on recovery day through 68 days postflight in both the Scientist Pilot and Pilot, however, the left ventricular end-diastolic volume, stroke volume, and mass were decreased slightly. Left ventricular function curves were constructed for the Commander and Pilot by plotting stroke volume versus end-diastolic volume. In both astronauts, preflight and postflight data fell on the same straight line demonstrating that no deterioration in cardiac function had occurred. These data indicate that the cardiovascular system adapts well to prolonged weightlessness and suggest that alterations in cardiac dimensions and function are unlikely to limit man's future in space.
    Keywords: AEROSPACE MEDICINE
    Type: NASA. Johnson Space Center Proc. of the Skylab Life Sci. Symp., Vol. 2; p 711-721
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Depth of immersion as a determinant of the natriuresis of water immersion (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The current study was undertaken to further assess the contribution of an immersion-induced hydrostatic pressure gradient on the redistribution of blood volume. The rate of sodium excretion by seated subjects was significantly increased by water immersion up to the chest and neck compared to waist immersion and controls. These results are consistent with the hypothesis that whereas immersion to the level of the diaphragm merely cancels the intravascular hydrostatic pressure gradient by providing an identical external gradient, immersion above the diaphragm level results in increased water pressure which tends to favor a shift in blood volume from the lower extremities.
    Keywords: AEROSPACE MEDICINE
    Type: Society for Experimental Biology and Medicine; vol. 146
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Alterations in acid-base homeostasis during water immersion in normal man (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The effects of water immersion on renal bicarbonate and acid excretion were assessed in 10 normal male subjects. Immersion resulted in a highly significant progressive increase in the rate of sodium and bicarbonate excretion, and in urine pH. Immersion was also associated with a significant increase in urine P-CO2; this increase presupposes a maintained rate of hydrogen secretion in the distal tubular segment. The rapidity of onset of the bicarbonaturia (2 hrs of immersion) and the concomitant increase in urinary P-CO2 suggest that enhanced bicarbonate excretion of immersion cannot be completely accounted for by immersion-induced suppression of aldosterone, and that the natriuresis and bicarbonaturia of immersion is mediated in part by an increased proximal rejection of sodium and bicarbonate.
    Keywords: AEROSPACE MEDICINE
    Type: Journal of Laboratory and Clinical Medicine; 84; Dec. 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
    Electronic Resource
    Electronic Resource
    Geschwindigkeit der chemischen Selbsterhitzung. (Adiabatische Reaktionskinetik) (1904)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 42 (1904), S. 341-352 
    Details
    ISSN: 0863-1778
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19040420124
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  • 7
    Electronic Resource
    Electronic Resource
    Studies on the chemical syntheses and on the characteristics of polyaniline derivatives (1995)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 33 (1995), S. 1227-1234 
    Details
    ISSN: 0887-624X
    Keywords: polyanilines ; derivatives ; chemical synthesis ; oxidation state ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Syntheses of parent polyaniline and methyl, methoxy, and ethoxy ortho-substituted polyanilines were performed using the conventional chemical methodology and monitored using the new open-circuit-potential (Voc) profile technique. The intermediate pernigraniline oxidation state was identified and isolated at the Voc maximum (A) during the conventional chemical synthesis of poly(o-methoxyaniline) in the emeraldine oxidation state. The introduction of the substituent on the aniline ring leads to longer polymerization times and lower Voc values. Syntheses in the presence of two different monomers in solution were also investigated and showed preferential polymerization of the monomer with the lowest Voc potential. All polymers produced were characterized by elemental analysis, gel permeation chromatography, UV-VIS spectroscopy, and cyclic voltammetry. The influence of the substituent on the Voc profile and on the polymer characteristics are rationalized in terms of steric and electronic effects. © 1995 John Wiley & Sons, Inc.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1995.080330805
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  • 8
    Electronic Resource
    Electronic Resource
    Magnetic field induced reversed (Negative) magnetization for electrochemically deposited Tc = 260 K Oxidized Films of Chromium Cyanide MagnetsWe gratefully acknowledge support from the US National Science Foundation, Grant no. CHE-9320478, Department of Energy, Division of Materials Science, Grant no. DE-FG02-86ER45271.A000, Department of Energy, Division of Advanced Energy Projects, Grant no. DE-FG02-96ER12198, and the Office of Naval Research. (1997)
    Weinheim : Wiley-Blackwell
    Advanced Materials 9 (1997), S. 645-647 
    Details
    ISSN: 0935-9648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/adma.19970090812
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  • 9
    Electronic Resource
    Electronic Resource
    Growth of nickel sulfate in a laboratory-scale fluidized-bed crystallizer (1974)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 20 (1974), S. 678-687 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Growth and dissolution rates of nickel sulfate α-hexahydrate were measured as functions of the concentration driving force in a laboratory-scale fluidized-bed crystallizer for the temperature range 35° to 50°C and the crystal size range 0.5 to 4.0 mm.Dissolution rates at a given temperature and crystal size were first order in the concentration driving force. Growth rates were about one-quarter of dissolution rates and depended on a higher exponent (around 1.3) of the concentration driving force. This exponent was not significantly affected by variations in crystal size, but decreased as temperature increased. The apparent variation of growth rate itself with crystal size at constant temperature was slight. Growth rates were found to be insensitive to solids concentration.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690200408
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  • 10
    Electronic Resource
    Electronic Resource
    Copolymers in dilute solution. I. Preliminary results for styrene-methyl methacrylateWork supported in part by Office of Ordnance Research. (1996)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 34 (1996), S. 1005-1018 
    Details
    ISSN: 0887-6266
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The dilute solution properties of copolymers are briefly discussed in relation to those of the parent homopolymers. It is shown that copolymer molecules are usually more expanded in solution than would be expected from the averaged behavior of the pure polymers, because of repulsive interactions between the unlike monomer units. A thermodynamic parameter χAB characterizing these interactions can be derived from measurements of the dilute solution properties of copolymers. In favorable cases this parameter can be independently evaluated from studies of ternary systems composed of the two parent homopolymers and a solvent, thus allowing prediction of the behavior of the copolymer. Light scattering and viscosity measurements on fractions of approximately equimolal copolymers of styrene and methyl methacrylate are presented and analyzed. The values of χAB deduced from the results in two solvents agree satisfactorily with each other, but are somewhat larger than those earlier obtained from measurements on ternary systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1996.905
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