The absorption and fluorescence spectra of 7-dimethylamino cyclopenta [c] coumarin (C138) and 4-methyl-piperidino [g] coumarin (C339) dyes were measured in neutral, aprotic and protic solvents. Solvatochromic shifts of absorption and fluorescence as a function of different solvent polarity parameters (bulk as well as microscopic) were analyzed for these dyes and the ground state dipole moment (...

I N THIS study two of the radioactive isotopes of chlorine, Cl36 (half life 400,000 years) and C138 (half life 38 minutes) have been used in an effort to establish more definitively than has been done previously the relationships, in the dog, of the chloride space to the volumes of distribution of sodium, bromide and inulin. The first measurements of the radioactive chloride space in dogs were ...

The effect of drought stress on carbon metabolism in the leaves and roots bermudagrass was investigated. Plants established PVC tubes suffered from three water treatments for 10 days. C138 Tifway (drought-tolerant) were found to have lower relative electrical conductivity higher use efficiency than C32 (drought-sensitive) under moderate by increasing carotenoid soluble sugar content rapidly dec...

Budding yeast septins assemble into hetero-octamers and filaments required for cytokinesis. Solvent-exposed cysteine (Cys) residues provide sites for attaching substituents useful in assessing assembly kinetics and protein interactions. To introduce Cys at defined locations, site-directed mutagenesis was used, first, to replace the native Cys residues in Cdc3 (C124 C253 C279), Cdc10 (C266), Cdc...

Otsuka, Eri, Akira Yamaguchi, Shigehisa Hirose, and Hiromi Hagiwara. Characterization of osteoblastic differentiation of stromal cell line ST2 that is induced by ascorbic acid. Am. J. Physiol. 277 (Cell Physiol. 46): C132–C138, 1999.—The stromal cell line ST2, derived from mouse bone marrow, differentiated into osteoblast-like cells in response to ascorbic acid. Ascorbic acid induced alkaline p...