Spore formation is a controlled process of differentiation which has been arbitrarily divided into seven stages: the axial chromatin stage, septation, engulfment of the spore protoplast, cortex formation, coat formation, maturation, and the free spore stage [P. C. Fitz-James, Colloq. Intern. Centre Natl. Rech. Sci. (Paris) 124: 529, 1965; P. Schaeffer et al., Colloq. Intern. Centre Natl. Rech. ...

the cytotoxic chloroform fraction of euphorbia aellenii rech. f. (euphorbiaceae) afforded two new phorbol diterpenoids: 4-deoxy-4α-phorbol-12-(2,3-dimethyl) butyrate-13-isobutyrate and 17-hydroxy-4-deoxy-4α-phorbol-12-(2,3-dimethyl) butyrate-13-isobutyrate. their structures were elucidated by nmr and other spectroscopic methods. the immunomodulating potentials of the isolated compounds were tes...

The cytotoxic chloroform fraction of Euphorbia aellenii afforded two cycloartane type triterpenes — cycloart-25-en-3,24-diol (1) and 24-methylene-cycloartan-3-ol (2) — for the first time from this plant. Preparation of cycloartane derivatives, 3, 24-O-diacetyl-cycloart-25-en as compound 3 and 3-O-acetyl-24-methylene-cycloartan (4) were conducted by acetylating of 1 and 2, respectively. The ...

, J. Geogr., 106, 156–167.Arita, K., Y. Ohta, C. Akiba, and Y. Maruo (1973),Kathmandu region, in Geology of the Nepal Hima-layas, edited by S. Hashimoto, Y. Ohta, and C. Akiba, pp. 99–145, Saikon, Sapporo, Japan.Arita, K., R. D. Dallmeyer, and A. Takasu (1997),Tectonothermal evolution of the Lesser Himalaya, Nepal: Constraints fromAr/Ar ages from theKathmandu Nappe, ...

Astragalus fridae Rech. F. is a native and endemic species in Iran. Considering the circumstances of this species in the country and the world and the importance of conservation of genetic resources, the awareness of A. fridae forage quality seems necessary. For this purpose, forage samples of A. fridae were taken at four phenological stages including vegetative growth, flowering, seed setting ...