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  • 2000-2004
  • 1995-1999  (4)
  • 1997  (4)
  • Iris ensata  (1)
  • Key words Small intestine  (1)
  • emulsion polymerization  (1)
  • gonad  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Ascorbic acid prevents ischemia-reperfusion injury in the rat small intestine (1997)
    Springer
    Transplant international 10 (1997), S. 89-95 
    Details
    ISSN: 1432-2277
    Keywords: Key words Small intestine ; ascorbic acid ; reperfusion ; Ascorbic acid ; small intestine ; reperfusion ; Reperfusion ; ascorbic acid ; small intestine ; Ischemia ; ascorbic acid ; reperfusion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Ischemia-reperfusion injury by free radicals and lipid peroxides is observed in various organs. Ascorbic acid (AsA) or glutathione (GSH) in various doses (AsA:2, 0.5, 0.1 mmol/kg, GSH:2 mmol/kg) was intraperitoneally administered to male Wistar rats. The entire small intestines were resected just before ischemia, after ischemia, and after 20 min of reperfusion (n = 7–10 at each time point). At each time point, the specimens were subjected to assays of lipid peroxides, GSH, and glutaminase activity of the tissues; they were also examined histologically. In the AsA group, the production of lipid peroxides after reperfusion was significantly suppressed in a dose-dependent manner, and the ratio of oxidized GSH to total GSH was also significantly low. Tissue glutaminase activity decreased to a lesser extent, and the degree of injury was apparently less marked in the AsA group. This study indicates that AsA acts as an antioxidant against peroxidative tissue injury, possibly by scavenging radicals, preserving reduced GSH, and reducing the peroxidative reaction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001470050018
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Anthocyanin-flavone copigmentation in bluish purple flowers of Japanese garden iris (Iris ensata Thunb.) (1997)
    Springer
    Euphytica 98 (1997), S. 163-167 
    Details
    ISSN: 1573-5060
    Keywords: Iris ensata ; copigmentation ; bluing effect ; flower color breeding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The in vitro identification of copigmentation was carried out using anthocyanins, such as malvidin 3RGac5G, petunidin 3RGac5G and delphinidin 3RGac5G and the flavone isovitexin. These are major pigments of Iris ensata. These anthocyanins brought about copigmentation, i.e., the bathochromic shift (bluing effect) of visible λ max due to increased concentrations of isovitexin, and 32 to 35 nm were estimated as the magnitude (Δλ max) of each shift. In addition, the absorption spectrum of 0.1 mM malvidin 3RGac5G, 0.07 mM petunidin 3RGac5G and 0.7 mM isovitexin mixture closely matched those of the fresh outer perianths of the bluish purple cultivars, ‘Suiten-isshoku’, ‘Hekikai’ and ‘Yakonotama’ which belong to the malvidin 3RGac5G - petunidin 3RGac5G type of I. ensata. Therefore, these results indicated that the bluing effect on the flower color of the bluish purple cultivars of this species was caused at least in part by the copigmentation between these anthocyanins and the flavone isovitexin. For the copigment effects of isovitexin among malvidin 3RGac5G, petunidin 3RGac5G and delphinidin 3RGac5G, λ max and Δλ max of delphinidin 3RGac5G was slightly higher than those of malvidin 3RGac5G or petunidin 3RGac5G, and the copigmentation of delphinidin 3RGac5G was characterized by a higher concentration of isovitexin. Finally, the breeding for blue flowers due to copigmentation of delphinidin 3RGac5G with isovitexin in I. ensata was discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003152813333
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of molecular weight on the production of multi-hollow polymer particles by the alkalîcooling method (1997)
    Springer
    Colloid & polymer science 275 (1997), S. 82-85 
    Details
    ISSN: 1435-1536
    Keywords: Key words Multi-hollow particle ; emulsion polymerization ; morphology ; carboxyl group ; alkali swelling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract  The effects of molecular weight, particle diameter and cooling condition on the formation of multi-hollow structure formed within submicron-sized styrene-methacrylic acid copolymer particles by the “alkali/cooling method” proposed by the authors were examined and the formation mechanism was proposed. The original particles were produced by emulsion copolymerization in the presence of n-octyl mercaptan as a chain transfer agent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050055
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Differentiation and development of Leydig cell, and induction of spermatogenesis during testicular differentiation in the Japanese eel, Anguilla japonica (1997)
    Springer
    Fish physiology and biochemistry 16 (1997), S. 187-195 
    Details
    ISSN: 1573-5168
    Keywords: gonad ; testicular differentiation ; Leydig cell ; Sertoli cell ; human chorionic gonadotropin ; spermatogenesis ; 11-ketotestosterone ; eel ; steroid producing cell
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The initial appearance and the development of Leydig cells (LCs), the sites of steroid hormone production in the testis, were investigated ultrastructurally during testicular differentiation in the Japanese eel, Anguilla japonica. In addition, the effects of a single injection of human chorionic gonadotropin (HCG; 5 IU g body weight-1) on histological changes of the testes and serum 11-ketotestosterone (11-KT) were examined at various stages (15–18, 20–23, 26–29, 32–35, 38–41 and 46–50 cm body length (BL)) of testicular differentiation. Testicular differentiation was morphologically characterized by the development of loose connective tissue on the medial side in animals 18–29 cm in BL. Ultrastructurally, LCs were first identified in the loose connective tissue of the testis of the 23 cm fish. In the testes of fish over 32 cm, clusters of LCs were distributed throughout the interstitial region accompanying the increase in number of spermatogonia. In fish larger than 32 cm, spermatogenesis was induced by administration of HCG; serum 11-KT levels were also raised. On the other hand, there was no effect on spermatogenesis or serum 11-KT levels in fish less than 29 cm, or in the controls. These result suggests that morphological differentiation of LCs occurs in testis of the 23 cm eel, and subsequently, the testes of eels of BL more than 32 cm acquire the capability to produce steroid hormones.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007753115397
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    Paper (German National Licenses)
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