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  • Articles  (2)
  • Photocycloaddition  (1)
  • vascular reactivity  (1)
  • 1990-1994  (2)
  • 1
    ISSN: 1434-4475
    Keywords: Photocycloaddition ; Selenophene ; Dimethylmaleimide ; Benzophenone photosensitized cycloaddition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die benzophenonsensitivierte Photocycloaddition von 2,3-Dimethylmaleimid an Selenophen und 3,4-Dimethylselenophen wurde durchgeführt, um erstens die Photoadditionsreaktionen von Methylmaleinsäureanhydridderivaten an Selenophen allgemein zu studieren und um zweitens die Zusammensetzung der bei der Reaktion gebildeten Produktgemische erneut zu untersuchen. Zusätzich zu dem bei früheren Arbeiten gefundenen 1:1-Addukt werden drei geometrische Isomere für das 2:1 — Addukt (2 Moleküle Maleimid und 1 Molekül Selenophen oder 3,4-Dimethylselenophen) vorgeschlagen.
    Notes: Summary The benzophenone sensitized photocycloaddition of 2,3-dimethylmaleimide to selenophene and 3,4-dimethylselenophene was carried out first to generalize the photoaddition reaction of methylmaleic anhydride derivatives to selenophene, using this time the nitrogen analogue, and second to reexamine the composition of the product mixture formed in the reaction. It was found that in adition to the 1:1 adduct isolated in previous investigations, three geometrical isomers may be proposed for the 2:1 adduct (two molecules of maleimide of one of selenophene or its methyl derivative).
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 46 (1990), S. 868-869 
    ISSN: 1420-9071
    Keywords: Goldblatt two kidney-one clip hypertension ; vascular reactivity ; noradrenaline ; vasopresin ; angiotensin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary We studied the possible contribution of increased vascular reactivity in the chronic phase of Goldblatt two kidney-one clip hypertension. Vascular reactivity was evaluated in aortic strips from hypertensive rats (16 weeks after inducing hypertension) and age-matched control rats. The findings were: a) increased sensitivity to vasopressin in the aortic tissue of hypertensive rats, b) a similar response to angiotensin II, noradrenaline and KCl in hypertensive and control rats, and c) reduced maximal response to angiotensin II compared with other vasoconstrictors in both groups of rats. These results suggest a possible role for vasopressin in the chronic phase of this model of hypertension.
    Type of Medium: Electronic Resource
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