The effect of nine different pesticides on the growth of yeasts isolated from the leaves of fruit and forest trees was investigated. Four insecticides (with the active ingredients: thiacloprid, deltamethrin, lambdacyhalothrin, and thiamethoxam) and five fungicides (with the effective substances: bitertanol, kresoxim-methyl, mancozeb, trifloxystrobin, and cupric oxychloride) were tested. The con...

Several concentrations of 9-chloro-9-(4-diethylaminophenyl)-10-phenylacridan (C-390), ranging from 5 to 100 micrograms/ml, were incorporated in brain heart infusion agar, MacConkey agar, and xylose-lysine-deoxycholate agar to evaluate the recovery of Pseudomonas aeruginosa from 538 sputum, 174 urine, and 22 stool samples. Seventy-six sputum samples containing P. aeruginosa grew this bacterium a...

Demain, Arnold L. (Merck Sharp & Dohme Research Laboratories, Division of Merck & Co., Inc., Rahway, N.J.). Nutrition of "adenineless" auxotrophs of yeasts. J. Bacteriol. 88:339-345. 1964.-Nutritional studies on 29 "adenineless" yeast strains were carried out. In no case could guanine, xanthine, or their ribonucleosides or ribonucleotides be used to satisfy the purine requirement. The cultures ...

Knowledge of the mechanisms involved in pyrimidine metabolism is fundamental to the biochemistry of the nucleic acids. Cerecedo, Emerson, and Stekol (l-7) pioneered this field in their work with dogs. Their experiments, conducted by feeding the in vitro oxidation products of uracil and the estimation of excreted urea, culminated in the proposal of a mechanism for pyrimidine metabolism (8). More...

The presence of yeasts in milk may cause physical and chemical changes limiting the durability and compromising the quality of the product. Moreover, milk and dairy products contaminated by yeasts may be a potential means of transmission of these microorganisms to man and animals causing several kinds of infections. This study aimed to determine whether different species of yeasts isolated from...

Bacterial profile modification (BPM) is being developed as an oil recovery technique that uses bacteria to selectively plug oil depleted zones within a reservoir to divert displacing fluids (typically water) into oilrich zones. Leuconostoc mesenteroides, which produces dextran when supplied with sucrose, is a bacterium that is technically feasible for use in profile modification. However, the t...

Cell growth and division are two processes tightly coupled in proliferating cells. While Target of Rapamycin (TOR) is the master regulator of growth, the cell cycle is dictated by the activity of the cyclin-dependent kinases (CDKs). A long-standing question in cell biology is how these processes may be connected. Recent work has highlighted that regulating the phosphatases that revert CDK phosp...