Chemosensation in C. elegans Worms have a very simple chemosensory system composed of 32 neurons. Despite this simplicity, they are capable of detecting and appropriately responding to a Dallas, Texas 75235-9111 wide range of chemicals (Bargmann et al. Lucretius, one of the early Greek atomists, suggested have shown that chemoattraction to a number of mole-that all substances having odor gave o...

In the crystal of the title compound, C(24)H(33)NO(9), inter-molecular C-H⋯O hydrogen bonds link the mol-ecules.

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

Streptococcus paracitrovorus (Hammer, 1920) is a heterofermentative lactic acid organism associated with Streptococcus lactis in butter cultures. In milk culture it is known to ferment citric acid with the subsequent production of diacetyl, the principal flavor and aroma constituent of cultured butter. The breakdown of citrates in milk by Streptococcus citrovorus and Streptococcus paracitrovoru...

Four patterns of inositol fermentation by different isolates of Klebsiellae are described. Inositol fermentation by some isolates may be modified by medium incorporation of acetoin and diacetyl. An inositol--hydrogen sulphide--motility medium, modified by reducing the pH value, increasing the inositol concentration, and the incorporation of acetoin, is described and evaluated as a means of dete...