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  • Articles  (95)
  • Polymer and Materials Science  (85)
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  • 2020-2023
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  • 1960-1964  (95)
  • 1963  (95)
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  • Articles  (95)
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  • 2020-2023
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  • 1995-1999
  • 1960-1964  (95)
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  • 1
    Electronic Resource
    Electronic Resource
    Enzymatic process for mustard seed to produce oil, meal, and allyl isothiocyanatePresented at the 141st National Meeting of the American Chemical Society, Washington, D.C., March 30, 1962. (1963)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 5 (1963), S. 27-39 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Removal of the pungent factor, allyl isothiocyanate, will partly determine whether mustard seed can become a commerical source for oil and meal in the United States. In processing studies at the Northern Laboratory, the mustard glucoside was converted enzymatically and the pungent oil was removed. This process has now been extended to pilot-plant scale by using filtration-extraction equipment at the Southern Laboratory. After desolventization and further steam stripping, the extracted meal had a residual content of 2.9% crude fat and 0.004% allyl isothiocyanate.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260050106
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  • 2
    Electronic Resource
    Electronic Resource
    Chemical properties of crystalline N-methylethyloxytetracycline (1963)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 5 (1963), S. 83-85 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The inclusion of ethionine in Streptomyces rimosus fermentation resulted in the production of N-methylethyloxytetracycline. The compound has been isolated, crystallized, and a number of its chemical properties determined.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260050203
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  • 3
    Electronic Resource
    Electronic Resource
    Heterogeneous polymer systems. II. Characterization of graft copolymers of styrene on polyethyl acrylate (1963)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 7 (1963), S. 59-69 
    Details
    ISSN: 0021-8995
    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
    Notes: The isolation of two graft copolymers of styrene on polyethyl acrylate from the ungrafted homopolymers by solvent extraction procedures is discussed. For the grafts and their corresponding mixtures ηsp/c versus c plots were determined, and no anomalies were observed. Qualitative data on the solubilities and phase properties of the grafts are given. Torsional modulus-temperature curves are shown for graft copolymer and the individual homopolymers.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1963.070070106
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  • 4
    Electronic Resource
    Electronic Resource
    On a relationship between stereoregularity and particle size broadeningNo. 6 in a series on stereoregularity. Contribution No. 141 from Chemstrand Research Center, Inc. (1963)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Letters 1 (1963), S. 77-78 
    Details
    ISSN: 0449-2986
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1963.110010204
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  • 5
    Electronic Resource
    Electronic Resource
    Syndiotactic polyvinyl formate and derived polyvinyl alcohol (1963)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A: General Papers 1 (1963), S. 951-964 
    Details
    ISSN: 0449-2951
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A study was made of the effect of polymerization temperature on the syndiotacticity of polyvinyl formate. Vinyl formate was polymerized with ultraviolet light initiation in the temperature range from -20 to +30°C. The value of (Ep  -  Et)/2 obtained, 4.5 kcal./mole, is characteristic of those values obtained by other workers for the free radical-initiated polymerization of vinyl acetate. A linear relationship was found to exist between the viscosities of the polyvinyl formates and those of the derived polyvinyl alcohols. The degree of polymerization of polyvinyl formate may be calculated from the equation: [η] = 4.42 × 10-3 DP0.63. The low temperature polymerization of vinyl for- mate results in more syndiotactic polymer, as shown by x-ray diffraction. Polyvinyl for-mate obtained at more elevated polymerization temperatures did not demonstrate the same degree of order. No difference was found between the infrared spectra of the polyvinyl formates. The polyvinyl alcohol derived from polyvinyl formate polymerized at low temperatures (0 to -35°C.) exhibits water resistance and forms a colored iodine complex similar to that obtained with the syndioactic polyvinyl alcohol derived from polyvinyl trifluoroacetate. Conventional polyvinyl alcohol and that derived from polyvinyl acetate polymerized at -30°C. do not exhibit the same properties. Minor differences in the 1,2-glycol content in the various polyvinyl alcohols do not account for the differences in the observations. The amount of head-to-head addition in various vinyl aliphatic esters seems to be related to the inductive strength of the acid portion of the ester. No difference was found between the crystallinities of the various polyvinyl alcohols, as measured by film density. Heat treatment increases the crystallinities about the same amount, but the water resistance of the stereoregular materials remains higher. From the good correlation between the observations made on polyvinyl formate and the derived polyvinyl alcohol, it is concluded that syndiotactic polyvinyl formate, and hence syndiotactic polyvinyl alcohol, is obtained by the low temperature free radical-initiated polymerization of vinyl formate. Increased syndiotacticity is more readily obtained in polyvinyl formate than in polyvinyl acetate, indicating the greater influence of inductive effect compared with the steric effect in controlling stereoregularity during free-radical propagation.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1963.100010310
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  • 6
    Electronic Resource
    Electronic Resource
    A study on the thermal degradation of rubber in dilute solutionsCommunication No. 529 from the National Chemical Laboratory, Poona-8, India. (1963)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 7 (1963), S. 2199-2209 
    Details
    ISSN: 0021-8995
    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
    Notes: The kinetics of low-temperature (60-100°C.) thermal degradation of deproteinized and deresinified petroleum ether soluble fraction of natural rubber in two chemically inert solvents, cyclohexane and trans-decalin, have been studied. The changes in Mw, A2, and (r2)1/2 at various stages of degradation have been obtained from the lightscattering data. The rate constants and the energy of activation for chain scission have been calculated from the observed variation in Mu. The scission has been found to be random and the average energy of activation is 25.8 kcal./mole. This low-energy requirement suggests the presence of weak links in the rubber molecule which get ruptured at low temperature.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1963.070070619
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  • 7
    Electronic Resource
    Electronic Resource
    Polymer flow irregularities (1963)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 7 (1963), S. S27 
    Details
    ISSN: 0021-8995
    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/app.1963.070070629
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  • 8
    Electronic Resource
    Electronic Resource
    Calibration device for an extensometer (1963)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 7 (1963), S. S15 
    Details
    ISSN: 0021-8995
    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: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1963.070070331
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  • 9
    Electronic Resource
    Electronic Resource
    Biosynthesis of 7-chloro-6-demethyltetracycline in the presence of certain homocysteine derivatives and methoxinine (1963)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 5 (1963), S. 87-89 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Addition of the S-2-hydroxyethyl-, S-2-chloroethyl-, S-n-propyl-, and S-iso-propyl-derivatives of homocysteine, and methoxinine to S. aureofaciens (ATCC 13900) fermentations resulted in production of 7-chloro-6-demethyltetracycline in addition to the normally synthesized 7-chlortetracycline.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260050204
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  • 10
    Electronic Resource
    Electronic Resource
    Plate assay methods for amino acids. 1. A sensitive cup plate assay for lysine with Streptococcus faecalis ATCC 6057 (1963)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 5 (1963), S. 131-146 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A sensitive cup plate assay method for lysine on large plates using S. faecalis ATCC 6057 as the test organism is described in detail. Well-defined zones of dense growth were obtained in a rectilinear dose - response range from 5 to 3000 μg. of L-lysine/ml. Comparative assays on twelve different samples were carried out using the turbidimetric tube assay method with Leuc. mesenteroides ATCC 8042 and the cup plate method with S. faecalis ATCC 6057. Good agreement between the two assay methods was obtained for five samples. For the remaining seven samples the tube assay values were appreciably higher than those obtained by the plate method. This discrepancy is discussed. Pure lysine added to various sample extracts could be quantitatively recovered. The specificity of the lysine requirement of S. faecalis ATCC 6057 in the plate assay was also investigated. Under certain experimental conditions, a weak and variable response was obtained with D-lysine and the polyamines cadaverine, spermine, and spermidine. There was generally no difficulty in distinguishing the D-lysine and polyamine growth zones from the L-lysine growth zones. This growth effect of D-lysine and polyamines could be diminished and even completely abolished by increasing the DL-hydroxylysine hydrochloride level in the plate medium. The lysine peptides glycyl-L-lysine and L-lysylglycine gave excellent growth zones of the same appearance as those produced by L-lysine. The activity of these two peptides in cup tests were on a molar basis about 70% of that of L-lysine.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260050209
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