Fifteen wheat genotypes were grown under water deficit to ascertain the role of osmotic adjustment (OA) and the concentration of benzoxazinones in sustaining grain yield. A positive correlation between osmotic adjustment capacity and yield was observed in wheat genotypes cultivated under field conditions. The weight gain of plants exposed to drought was in agreement with the OA values (R(2) = 0...

W. S. Hamama, M. Hammouda*, and E. M. Afsah Chemistry Department, Faculty of Science, Mansoura University, Mansoura, Egypt Z. Naturforsch. 43b, 483-486 (1988); received August 18, 1986/October 26, 1987 Mannich Bases of Enaminones, Octahydro-9H-pyrimido[5,4-b]-azepines, Tetrahydro-4H-[3,l]benzoxazin-5(6H)-one, Nitrogen Heterocycles Mannich reaction of the title compound 1 with morpholine, piperi...

3,4-Dihydro-3-methyl-6-nitro-2H-1,3-benzoxazin-2-one ('DMNB') reacts with cytoplasmic aldehyde dehydrogenase in a similar way to that previously observed with the structurally related p-nitrophenyl dimethylcarbamate, but provides a covalently linked p-nitrophenol-containing reporter group at the enzyme's active site. The pKa of the enzyme-linked reporter group is much higher than that of free p...

An attempt was made to study the bioactive compounds from a terrestrial Streptomyces sp. ANU 6277 isolated from laterite soil. Four active fractions were recovered from the solvent extracts obtained from the culture broth of five day-old strain. Three bioactive compounds were purified and identified as 3-phenylpropionic acid, anthracene-9,10-quinone and 8-hydroxyquinoline. The components of the...