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  • 1
    Electronic Resource
    Electronic Resource
    Preparation of polyamides having 1,2,4-triazine rings in the main chain (1987)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 188 (1987), S. 1253-1259 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Polyamides having 1,2,4-triazine rings in the main chain (6 and 7) were prepared from 3-substituted 4,4′-(1,2,4-triazine-5,6-diyl)dibenzoic acids (5) and aromatic diamines. The thermal stability and the solubility of polyamides 6 and 7 were compared with those of structurally identical polyamides (polymers 3 and 4) obtained by polymer homologous reaction of polyamides having α-diketone moieties with amidrazones. The effects of introduction of 1,2,4-triazine-5,6-diyl unit in the main chain on the thermal stability and solubility of the polymers are discussed.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1987.021880603
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Distribution of myofiber types in the hip and thigh musculature of sheep (1988)
    New York, NY [u.a.] : Wiley-Blackwell
    The @Anatomical Record 221 (1988), S. 494-502 
    Details
    ISSN: 0003-276X
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: The composition of muscles by myofiber type is associated with their locomotory or postural functions. In the present study the composition of the hip and thigh musculature of sheep by myofiber types and the differences in their distribution were examined. Myofibers were classified into type I, IIA, and IIB myofibers by differences in myosin ATPase and NADH tetrazolium reductase (NADH-TR) activity. The vastus intermedius muscle consisted only of type I myofibers, which exhibit weak alkali-stable myosin ATPase and strong NADH-TR activity. The gluteus accessorius and profundus muscles had more than 50% type I myofibers. The other muscles had less than 50% type I myofibers as a whole. Type I myofibers were concentrated in the deep portions of the gluteus and quadriceps femoris muscles, which extend the hip and stifle joints, and of the pectineus muscle. They were scattered evenly in the caudally situated locomotory muscles in the thigh. Type IIA myofibers, characterized by strong alkali-stable myosin ATPase and NADH-TR activity, showed little difference in distribution in the hip and thigh muscles. Type IIB myofibers, characterized by strong alkali-stable myosin ATPase and weak NADH-TR activity, were distributed more in the cranial, caudolateral, and caudomedial portions than in the middle portions of the thigh. The distribution to type IIB myofibers is suited to powerful flexion and extension of the thigh and leg. In the hip and thigh musculature, it appears that type I myofibers are effectively distributed to maintain a standing posture without diminishing the propulsive force of the hindlimb.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ar.1092210106
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    Paper (German National Licenses)
    Fulltext
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