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  • Articles  (56)
  • Springer  (36)
  • Wiley-Blackwell  (20)
  • 2010-2014  (7)
  • 1980-1984  (13)
  • 1975-1979  (12)
  • 1965-1969  (8)
  • 1905-1909  (16)
  • Chemistry and Pharmacology  (56)
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  • Articles  (56)
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  • 1
    Electronic Resource
    Electronic Resource
    The effect of additives on the morphology of zinc electrodeposited from a zinc chloride electrolyte at high current densities (1981)
    Springer
    Journal of applied electrochemistry 11 (1981), S. 677-683 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract There are advantages if zinc can be deposited electrochemically at high current densities. In order to improve the deposit at current densities exceeding 2000 Am−2, various additions were made to the electrolyte. It was found that proteinous additives produced planar deposits with a (10.2) (10.3) orientation and a current efficiency of around 85% in a small laboratory cell.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00615170
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  • 2
    Electronic Resource
    Electronic Resource
    The conductivity of aqueous zinc chloride solutions (1982)
    Springer
    Journal of applied electrochemistry 12 (1982), S. 1-5 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The conductivity of aqueous zinc chloride reaches a maximum of 10.7 Ω−1 m−1 at 3.7 M ZnCl2. Measurements on chlorinated ZnCl2 showed that at low chlorine concentrations, the conductivity increased linearly with the square root of the chlorine concentration. The increase was due to the three species: dissolved chlorine, Cl 3 − and HClO. Ammonium chloride additions increased the conductivity of aqueous zinc chloride substantially.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01112058
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  • 3
    Electronic Resource
    Electronic Resource
    The amino acid substitution and some chemical properties of a variant human erythrocyte carbonic anhydrase: Carbonic anhydrase IdMichigan (1967)
    Springer
    Biochemical genetics 1 (1967), S. 171-195 
    Details
    ISSN: 1573-4927
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Carbonic anhydrase IdMichigan, an electrophoretic variant of human red cell carbonic anhydrase I, was purified from erythrocytes obtained from an individual heterozygous for the trait. Primary structural analysis indicates that a lysine residue has exchanged for a threonine residue in the variant enzyme. After isolation, there was approximately 1.8 times as much normal as variant enzyme. Thermostability studies demonstrated that carbonic anhydrase Id was more thermolabile than the normal enzyme. The normal and variant enzymes showed no differences in specific carboxylesterase activity or CO2 hydratase activity. Utilizing the carboxylesterase activity toward β-naphthyl acetate, the normal and variant enzymes had similar Michaelis constants, pH profiles, and rates of inhibition by acetazolamide. Immunochemical studies did not demonstrate an antigenic difference for the variant enzyme.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00486517
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  • 4
    Electronic Resource
    Electronic Resource
    Phosphoglucomutase electrophoretic variants in the mouse (1969)
    Springer
    Biochemical genetics 3 (1969), S. 25-35 
    Details
    ISSN: 1573-4927
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The phosphoglucomutase (PGM) electrophoretic phenotype of the mouse (Mus musculus) consists of several distinct components which can be grouped into two major zones designated PGM-1 and PGM-2. Evidence presented here indicates that each zone is controlled by a single genetic locus denoted Pgm-1 and Pgm-2, respectively. Two variant forms segregated at the Pgm-1 locus. They were codominantly expressed and inherited as alleles at an autosomal locus. The alleles were termed Pgm-1 a (fast) and Pgm-1 b (slow). These alleles were separately fixed in a number of inbred strains of mice. Preliminary evidence based on wild mouse phenotypes indicates that variant forms also exist for PGM-2 which are inherited as alleles at an autosomal locus. Genetic linkage relationships have not been determined for these loci. PGM-1 variants and PGM-2 were expressed in mouse fibroblasts in vitro.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00485972
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  • 5
    Electronic Resource
    Electronic Resource
    Preparation of a human lung purified plasma membrane fraction: Confirmation by enzyme markers, electron microscopy, and histamine H1 receptor binding (1984)
    Springer
    The journal of membrane biology 79 (1984), S. 33-39 
    Details
    ISSN: 1432-1424
    Keywords: plasma membrane ; lung ; histamine receptors ; 5′ nucleotidase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary A simple and rapid method of isolating plasma membranes from human peripheral lung tissue is described. The method involves homogenization of tissue in 0.25m sucrose-buffered medium followed by differential and sucrose density gradient centrifugation. Enzymatic and morphological characterization of the plasma membrane fraction revealed minimal contamination by nonplasma membrane fragments. The isolated plasma membranes showed an 18-fold purification of 5′-nucleotidase activity compared to the original homogenate. Electronmicroscopic studies of the plasma membrane fraction revealed the presence of small membrane vesicles having a trilaminar membrane structure. To further examine the purity of the plasma membrane preparation, the binding of the H1 receptor antagonist,3H pyrilamine, to the plasma membrane-enriched fraction was compared to the binding to crude membrane preparations. Both the plasma membrane-enriched fraction and the crude membrane preparation had similar Kd's for the histamine antagonist, but the plasma membrane-enriched fraction had a threefold greater binding capacity, reflecting the relative enrichment of plasma membranes of the preparation. Thus, a method has been developed for the isolation of plasma membranes from human peripheral lung which should provide material for a variety of biochemical and pharmacological studies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01868524
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  • 6
    Electronic Resource
    Electronic Resource
    Evolutionary evidence for a regulator gene controlling the lactate dehydrogenase B gene in rodent erythrocytes (1969)
    Springer
    Biochemical genetics 3 (1969), S. 525-536 
    Details
    ISSN: 1573-4927
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Erythrocyte and tissue lactate dehydrogenase (LDH) electrophoretic patterns of 26 rodent species from ten families were examined. The LDH B gene was observed to range in erythrocyte expression from species without detectable B subunits to those which predominantly expressed B subunits. However, the shift in erythrocyte B gene expression was not observed in the tissue LDH electrophoretic patterns between rodent species. Species which did not express erythrocyte B subunits, or only small quantities of B subunits, were restricted to the suborder Myomorpha. In erythrocytes of other rodent species, and most mammals, LDH B subunits are expressed equally or in excess of A subunits. The results suggest either structural differences in the LDH B gene between Myomorph and non-Myomorph rodents or a regulator gene which controls the expression of the B gene in Myomorph erythrocytes. Existing evidence favors the latter hypothesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00485474
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  • 7
    Electronic Resource
    Electronic Resource
    Temperature dependence of relative modulus in filled polymer systems (1969)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 7 (1969), S. 1705-1719 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The temperature dependence of relative modulus observed in filled thermoset, thermoplastic, and polyelectrolyte salt matrices is explained on the basis of induced stresses produced by the differences in the thermal expansion coefficients of the constituent materials. The analysis is based on the assumption that the modulus of the matrix in a filled polymer is less than that of the unfilled polymer. The temperature dependence of relative modulus is expressed as a function of the difference in thermal expansion coefficients, the volume fraction, the relative modulus in the unstressed state, and mechanical properties of the phases. Agreement is good between the analysis and experimental results for three systems: epoxy and glass, polyethylene and wollastonite, and a polyelectrolyte salt with mica and asbestos.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1969.160071007
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  • 8
    Electronic Resource
    Electronic Resource
    Steroid analysis by gas chromatography with SCOT and wide-bore WCOT columns (1980)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 3 (1980), S. 241-247 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary, glass ; Quantitative analysis at 10-10g level ; Steroids in urine ; Amino acid fluorobutyrates (19 in 35 min) ; Installation of glass capillaries ; Connection to FM-ECD ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Glass capillary columns are ideal for analysis of urinary steroid profiles (i.e. the total steroid neutral fraction without prior separation into sub-groups).In this paper performance of both SCOT and wide-bore WCOT columns has been compared, resulting in no significant quantitative difference on urine extracts run as trimethylsilyl ether derivatives. However, because of increased efficiency the WB-WCOT column exhibited more sensitivity in measurement of small amounts of 11-ox-aetiocholanolone. Sensitivity of other steroids was greatly enhanced by use of either SCOT or WB-WCOT, leading to an almost tenfold increase over conventional packed columns (e.g. androsterone and aetiocholanolone 〈 40 μg per 24 h urine sample). A simple splitless injection system (based on a design of Dr. W. Greenaway, Oxford University) is presented.Experiments were also carried out using a SCOT column in conjunction with an FM-electron capture detector. Whilst efficiency was impaired due to the design of the detector, use of He (carrier) and N2 (make up gas) showed that several steroid derivatives could be easily measured at well below the 10-10 g level with much more rapid retention times than with a 1½m packed column. Highly successful separation of 19 amino acids (as fluoro-acyl derivatives) was achieved in 35 minutes using a SCOT (30 m) SP2100 column.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240030504
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  • 9
    Electronic Resource
    Electronic Resource
    Die Chemie der Proteïnkörper des Weizenkornes. Teil II. Darstellung der Proteïne in genügender Menge für die Hydrolyse (1907)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 46 (1907), S. 749-756 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01301336
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  • 10
    Electronic Resource
    Electronic Resource
    Die Chemie der Proteïnkörper des Weizenkornes. III. Hydrolyse der Weizen-Proteïne (1908)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 47 (1908), S. 81-105 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01361300
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