Fluctuations in the growth rate of a bacterial culture during unbalanced growth are generally considered undesirable in quantitative studies of bacterial physiology. Under well-controlled experimental conditions, however, these fluctuations are not random but instead reflect the interplay between intra-cellular networks underlying bacterial growth and the growth environment. Therefore, these fl...

In this research, the inhibitory effects of silver nanoparticles and zinc oxide nanoparticles,  in vitro, on disease stone fruits bacterial canker caused by Pseudomonas syrigae pv. Syringae and disease bacterial blight caused by Xanthomonas arboricola pv. juglandis, were studied. Different concentrations of nanoparticles were prepared on Mueller Hinton agar medium in two different ways in a com...

Heterotrophlc production rates of nattve manna planktomc bacteria were esbmated by Increases or direct cell counts in 3 pm-filtered seawater and also via mcotporation of tritiated thymldine tnto DNA Results indicated that about 25 percent of pnmaq production IS consumed by bacteria. suggesbnc they are a mafor component of manne food webs rhe SC/” indicates that this paper has been cttec in more...

Haemophilus parainfluenzae incorporates glycerol and phosphate into the membrane phospholipids without lag during logarithmic growth. In phosphatidyl glycerol (PG), the phosphate and unacylated glycerol moieties turn over and incorporate radioactivity much more rapidly than does the diacylated glycerol. At least half the radioactivity is lost from the phosphate and unacylated glycerol in about ...

Chlorinated methanes are important industrial chemicals and significant environmental pollutants. While the highly chlorinated methanes, trichloromethane and tetrachloromethane, are not productively metabolized by bacteria, chloromethane and dichloromethane are used by both aerobic and anaerobic methylotrophic bacteria as carbon and energy sources. Some of the dehalogenation reactions involved ...

1. The addition of penicillin greatly increases the production of phage in bacterial suspensions containing 2.5 to 3.5 x 10(8) cells in 0.4 ml. broth plus 6.6 ml. Locke's solution. 2. Addition of niacin also greatly increases the formation of phage in the above system without the addition of penicillin. 3. The results indicate that niacin is necessary for phage production and that bacteria cann...

The events that follow the exponential phase of bacterial growth (Streptecoccus faecalis 9790) in a well buffered medium are determined by the nature of the growth-limiting nutrient (l-4). Termination of the exponential phase by the depletion of a “growth essential” ammo acid may be followed by either lysis or a phase of decreasing growth rate. The nature of this postexponential response seems ...

9 Few bacterial cells may be sufficient to produce a food-borne illness outbreak, provided that 10 they are capable of adapting and proliferating on a food matrix. This is why any quantitative 11 health risk assessment policy must incorporate methods to accurately predict the growth of 12 bacterial populations from a small number of pathogens. In this aim, mathematical models 13 have become a p...

Harkness, Donald R. (University of Miami School of Medicine, Miami, Fla.). Bacterial growth on aminoalkylphosphonic acids. J. Bacteriol. 92:623-627. 1966.-Of 10 bacterial strains tested, 9 were found to be able to utilize the phosphorus of at least one of eight different aminoalkylphosphonic acids for growth, indicating that the ability to catabolize the carbon-phosphorus (C-P) bond is widespre...