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  • Wiley-Blackwell  (120)
  • Blackwell Publishing Ltd  (59)
  • 1980-1984
  • 1960-1964  (179)
  • 1945-1949
  • 1961  (179)
  • 1
    Digitale Medien
    Digitale Medien
    STUDIES IN THE DIGESTIBILITY OF HERBAGE (1961)
    Oxford, UK : Blackwell Publishing Ltd
    Grass and forage science 16 (1961), S. 0 
    Details
    ISSN: 1365-2494
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Data from 291 digestion trials have been used to derive regression equations relating the organic-matter digestibility of herbage to the nitrogen percentage of its dry matter and to the nitrogen percentage in the organic matter of the resulting faces.The residual errors are very high and it is shown that the deviations from the lines are not randomly distributed but have a seasonal trend. The seasonal biases have been calculated, and the inclusion of month of cutting as a factor is found to improve the two regressions to some extent. Monthly regressions have also been calculated. Even with these, however, the errors are still too high for many practical purposes.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2494.1961.tb00215.x
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  • 2
    Digitale Medien
    Digitale Medien
    EFFECT OF 2-AMINO-2-HYDROXYMETHYL-1, 3-PROPANEDIOL ON ELECTROLYTE EXCRETION (1961)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 92 (1961), S. 0 
    Details
    ISSN: 1749-6632
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Allgemeine Naturwissenschaft
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1749-6632.1961.tb45007.x
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  • 3
    Digitale Medien
    Digitale Medien
    Viscoelastic factors in the strength of elastomers under complex stress by a puncture methodPresented at the Tenth Canadian High Polymer Forum, Ste. Marguerite, Quebec, September 7-9, 1960.Contribution No. 262 from the research laboratory of the Goodyear Tire & Rubber Company. (1961)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 5 (1961), S. 442-451 
    Details
    ISSN: 0021-8995
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: Investigations of the viscoelastic aspects of the mechanical behavior of polymers have been limited almost exclusively to relatively simple conditions of homogeneous stress, that is, to tension or shear loadings. In the present work a study has been made from the viscoelastic standpoint of the response of several elastomers to a much more complex type of stress distribution arising from penetration up to failure by a cylindrical indentor for a range of temperatures and rates of penetration. The failure or “puncture point” was determined by a dip in the recorded curve of load versus depth of penetration. The puncture strength values were reduced to 25°C. by applying the ratio of absolute temperatures and plotted against the logarithm of the reciprocal of the rate of penetration. These curves were then shifted on the time scale to give a master curve after the manner of Tobolsky and of Ferry. The logarithms of the shift factors thus obtained were related to the reciprocal of the absolute temperature over the range studied. The results indicate a broader generality for the viscoelastic principle of time-temperature equivalence than has usually been supposed.
    Zusätzliches Material: 13 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/app.1961.070051610
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  • 4
    Digitale Medien
    Digitale Medien
    Digital recording and automatic computation of film tensile stress-strain dataPresented at ASTM Committee D-20 Meeting, Detroit, Michigan, October 3, 1960. (1961)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 5 (1961), S. 527-533 
    Details
    ISSN: 0021-8995
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: A system is described for automatic collection of stress-strain data for polymeric films on magnetic tape for subsequent automatic data reduction and computation of a variety of stress-strain parameters. Two shaft analog-to-digital encoders attached to a conventional tensile tester feed digital information to an incremental pulse recorder which stores all stress and strain data in two channels on 0.625-in. magnetic tape. Specimen information and test constants are inserted by the operator through a keyboard located at the tensile tester. The tape is subsequently fed into a standard digital computer through a special incremental pulse magnetic tape reader. The data pulses are internally stored and converted by means of a special program into eight significant stress-strain parameters for polymeric film samples, plus averages and standard deviations for groups of replicate determinations. These parameters include: corrected length of specimen, initial maximum tensile modulus, offset yield stress, strain at break, strain at maximum stress, maximum tensile stress, tensile stress at break, and work to break. While the program described applies to polymer film testing, both it and the digital recording equipment accessories are applicable with suitable modification, to any analog experimental data. Significant savings in man-hours and increased information output result from use of this system.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/app.1961.070051705
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  • 5
    Digitale Medien
    Digitale Medien
    The effect of molecular weight distribution on the flow properties of polyethylene (1961)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 1 (1961), S. 40-46 
    Details
    ISSN: 0032-3888
    Schlagwort(e): Chemistry ; Chemical Engineering
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: The non-Newtonian flow behavior of polyethylene has been investigated with respect to the effects of molecular weight and molecular weight distribution. Effects of die geometry on melt fracture as well as preliminary extrudate orientation studies are discussed.
    Zusätzliches Material: 16 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pen.760010109
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  • 6
    Digitale Medien
    Digitale Medien
    Isomorphism phenomena in macromolecules (1961)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 51 (1961), S. 527-539 
    Details
    ISSN: 0022-3832
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: Through x-ray and infrared examinations of stereoregular polymers and copolymers of vinylaromatic monomers, the occurrence of chain isomorphism phenomena, together with many cases of a new type of isomorphism between monomeric units, have been proved. Isomorphism of macromolecules, allowing true solid solutions, has been observed when melting and crystallizing mixtures of homopolymers (i.e., isotactic polystyrene) and of crystalline copolymers (i.e., styrene-p-methylstyrene) having the same identity period and differing very little in lattice constants. Isomorphism among monomeric units occurs in copolymerizing monomers that have a chemical nature and shape slightly different one from the other, e.g., styrene and o-fluorostyrene. This allows the formation of crystallizable copolymers in the entire composition range. They show physical properties (lattice constants, melting temperatures, etc.) continuously varying between those of the pure homopolymers. The occurrence of isodimorphism phenomena has been observed in crystalline copolymers obtained from monomers the homopolymers of which have different crystalline structures (e.g., styrene-p-fluorostyrene), and also in copolymerizing styrene with monomers (e.g., p-methyl, p-chlorostyrene) giving only amorphous homopolymers. In the latter case, of course, the copolymers show crystallinity only in a limited composition range.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pol.1961.1205115610
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  • 7
    Digitale Medien
    Digitale Medien
    Graft copolymers of p-isopropylstyrene and methyl methacrylate (1961)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 49 (1961), S. 533-541 
    Details
    ISSN: 0022-3832
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: The preparation of a completely isopropylated polystyrene by polymerization of p-isopropylstyrene monomer is described. This polymer was autoxidized in cyclohexane with lauroyl peroxide to give a material of good reproducibility and high purity. Methyl methacrylate was successfully grafted to the polymeric hydroperoxide by using a sugar-containing recipe. Homopolymer was separated from the graft copolymer by extraction. Evidence for grafting was obtained from solubility and fractionation behavior, as well as from light-scattering and viscosity measurements.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pol.1961.1204915232
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  • 8
    Digitale Medien
    Digitale Medien
    Initial Development of Infections with Babesia bigeminal (1961)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 8 (1961), S. 0 
    Details
    ISSN: 1550-7408
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1550-7408.1961.tb01242.x
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  • 9
    Digitale Medien
    Digitale Medien
    Effect of Storage Temperature, Equilibration Time, and Buffers on Survival of Tritrichomonas foetus in the Presence of Glycerol at Freezing Temperatures (1961)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 8 (1961), S. 0 
    Details
    ISSN: 1550-7408
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: Tritrichomonas foetus survives when frozen in the presence of 1 M glycerol after growth in cysteine-peptone-liver-maltose (CPLM) medium. In the present study, survival upon storage was better in a chest-type freezer at a constant −21°C than in an upright freezer from which were recorded cyclic temperature fluctuations between −23 and −25° or in a dry-ice chest with a nominal temperature of −72°. By the use of special thermocouples inside the freezing tubes, it was found that the temperature fluctuated between −22 and −24° in the chest-type freezer, between −19 and −30° in the upright freezer, but rising as high as -2° when the door was opened and samples were removed, and markedly in the dry-ice chest as the dry ice melted and was replaced, sometimes rising to as high as −27°. The poorer survival in the latter 2 freezers was considered due to temperature fluctuation.When equilibration with glycerol was carried out at room temperature, survival upon subsequent freezing was better following rapid equilibration (glycerol added all at once; equilibration time, 1 hour) than following slow equilibration (1/6 of the final amount of glycerol added each hour for 6 hr.; equilibration time, 7 hr.).Survival was extremely poor following either rapid or slow equilibration in the refrigerator (4°). Since T. foetus can grow indefinitely at 37° in the presence of 10% glycerol and since it is protected by glycerol when frozen, there is a critical zone near 4° in which glycerol appears to be toxic.Buffering the storage medium to pH's 6.3 to 7.1 with glycyl-glycine increased survival upon freezing, but buffering to the same pH's with triethanolamine had no significant effect upon survival, and buffering to pH's 7.1 to 7.5 with phosphates decreased survival upon freezing.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1550-7408.1961.tb01175.x
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  • 10
    Digitale Medien
    Digitale Medien
    Characterization and Distribution of “H” Serotypes in 25°C Cultures of Tetrahymena pyriformis, Variety 1. (1961)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 8 (1961), S. 0 
    Details
    ISSN: 1550-7408
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: A survey of antigenic types, as revealed by immobilization reactions, among 78 strains of variety 1 of T. pyriformis grown in monoxenic cultures at 25°C discloses a minimum of six distinct classes. These are called the H serotypes, and are designated as types Ha, Hb, Hc, Hd, He and Hf. The terminal members of highly inbred series (Families A, A1, B, D, etc.) are of a single immunological class, but different inbred series show different serotypes. Early representatives of the inbred series show in contrast considerable serotypic variation. The distribution of serotypes is generally consistent with the genetic hypothesis developed in a parallel study, but new serotypes arise occasionally through some mechanism not yet adequately studied.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1550-7408.1961.tb01233.x
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