Sporeless mutants of Bacillus thuringiensis. II. mutants derived from var. thuringiensis and var. sotto.

Three sporeless mutants of Bacillus thuringiensis, 2 derived from var. thuringiensis and 1 from var. sotto were selected after mutagenic treatment. They were completely lacking in ability to form spores, yet maintained intact insecticidal activity.     

Astragalin ausPodophyllum peltatum L. undP. emodi Wall.

Summary A yellow flavonoid pigment, which occurs as a companion of the lignan glycosides inPodophyllum peltatum L. andP. emodi Wall. has been identified as astragalin (=kaempferol-3-glucoside).

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18. Mitt. über mitoschemmende Naturstoffe. 17. Mitt.:E. Schreier, Helv. chim. Acta47, 1529 (1964).     

A.T.P. et extractibilité des myosines

Summary A.T.P. has no influence upon the solubility of the myosins, but it hastens the dissociation of the myosin complexes inside of the myofibrils.The decrease in solubility of the myosins in stimulated muscles cannot be explained by a lack of A.T.P., for the addition of A.T.P. (0.3%) to the extract does not change the amount of myosin which goes into solution.     

The evolutionary history ofDrosophila buzzatii. V. Differential survivorship onOpuntia betweenD. buzzatii andD. serido

Summary Survival time ofDrosophila buzzatii adults on anOpuntia (prickly pear) medium was significantly longer than that of its nearest relativeD. serido. A significant difference was also found betweenD. buzzatii adults from two experimental populations, one of them fed onOpuntia rots for more than two years and another one kept on standardDrosophila medium for the same period of time. These results suggest that adult selection may be taking place in cactiphilicDrosophila in their natural habitats and could be responsible for the niche differentiation betweenD. buzzatii andD. serido.This work has been supported by the Comisión Asesora de investigación Científica y Técnica, Spain, by funds to project 4514/79 awarded to the third author.     

The effects of age and nutritional state on m.e.p.p. amplitude

Summary A quantitative restriction of food intake for 7 days reduced the amplitude of spontaneous miniature endplate potentials by about 1/3 in rats aged 30 days but not in rats aged 110 days.I would like to thank Dr D. V. Roberts for encouragement and advice and the Medical Research Council and the Muscular Dystrophy Group of Great Britain for financial support.     

Antidesmanol-a new pentacyclic triterpenoid fromAntidesma menasu Miq. ex. Tul.

Summary Antidesmanol (1), a new pentacyclic triterpenoid, has been isolated along with n-tritriacontane, friedelin, canophyllal and canophyllol from the aerial parts ofAntidesma menasu. Based on chemical and spectroscopic evidence, its structure has been established as 3-keto-16-hydroxyfriedelane. n-Tritriacontane and friedelin have shown antiinflammatory and diuretic activities respectively in experimental animals.CDRI Communication No. 2536.