Bacterial growth, rate

A mathematical model for reservoir souring caused by the growth of sulfate-reducing bacteria is available. The model is a one-dimensional numerical transport model based on conservation equations and includes bacterial growth rates and the effect of nutrients, water mixing, transport, and adsorption of H2S in the reservoir formation. The adsorption of H2S by the roek was considered. 

CO2 = Cti + S2 — Z, (f = CO2 + KhPt + qcHi/kLa-, Pt is the total pressure within the digester and qcRi is the molar flow rate of methane. The bacterial growth rates for acetogenic (Ai) and methanogenic X2) bacteria are approached by the Monod and Haldane kinetics... 

Monod kinetics are often a better description of the reactions occurring in sediment. Assume that the flux conditions are similar to problem 2 for SOD. The maximum bacterial growth rate is 0.5 hr in these sediments, and the halfsaturation coefficient is 1 g/m of oxygen. What is the microbacterial population for the 0.5- and 5-g/m -day cases (Hint, use a change of variables to solve for / = dCIdz.) Plot oxygen concentration for each case on the same scale as for problem 2 and compare the two plots. 

Practical and fundamental aspects of malo-lactic fermentation are given. Conditions which winemakers can use for better control of the fermentation, including detailed procedures for inoculation with Leuconostoc oenos ML 34 and for inhibition with fumaric acid, are presented. New information on the role of malic acid decarboxylation in bacterial metabolism and on the enzymatics of malic acid decarboxylation are reviewed. The malic acid decarboxylation seems to involve two pathways a direct decarboxylation of malic to lactic acid with NAD as a coenzyme and a concurrent but small oxidative decarboxylation to pyruvic acid and NADH. How these pathways can bring about the marked stimulation of bacterial growth rate by the malo-lactic reaction and their negligible effect on growth yield are discussed. 

Yingst, 3.Y. and Rhoads, D.C., 1980. The role of bioturbation in the enhancement of bacterial growth rates in marine sediments. In K.R. Tenore and B.C. Coull (eds), Marine benthic dynamics. University of South Carolina Press, Columbia, pp. 907-921. 

Kirchman, D. L., and J. H. Rich. 1997. Regulation of bacterial growth rates by dissolved organic carbon and temperature in the equatorial Pacific Ocean. Microbial Ecology 33 22-30. 

The formula for BCD in Eq. (2) was derived under the assumption that the bacterial growth rate was mineral nutrient limited. If the supply rate of labile organic carbon from allochthonous and autochthonous sources is insufficient to meet this demand, the pool of labile dissolved organic carbon (DOC) will eventually be depleted and the bacteria will become carbon... 

Values of q >1 thus correspond to steady states with carbon-limited bacterial growth rate, whereas values of q <1 correspond to mineral nutrient limitation. Equation (3) illustrates how everything depends on everything in a steady-state situation. The value of q is a function not only of the ratio between production rate of organic bacterial substrates and the product of loss rates of the bacterial predators and competitors to higher predators, but also of all the parameters representing physiological properties of bacteria, bacterial competitors, and bacterial predators. 

The poor correlation between bacterial growth rate and droplet size is due partly to the limitations of the light microscope method used (Dolby, 1965). Other influencing factors are nutrient level, salt and pH of the droplet... 

Thingstad TF, Lignell R (1997) Theoretical models for the control of bacterial growth rate, abundance, diversity and carbon demand. Aquat Microb Ecol 13 19-27... 

The relationship between siderophore production and bacterial growth rates has led to the belief that siderophore prodnction contribntes to bacterial viralence. Rednced viralence of mntants deficient in siderophore production have been reported for Yersinia pestis, the cansative agent of... 

Hagstrom, A., Larsson, U., Horstedt, P., and Normark, S. (1979). Frequency of dividing cells, a new approach to the determination of bacterial growth rates in aquatic environments. Appl. Environ. Microbiol. 37, 805-812. 

Enhanced bacterial growth rate and increased rate of n-alkane consumption Surfactant solubilization increases aqueous solubility of hydrocarbon 24... 

Soil bacterial growth rates in nature seem to be far slower than those typical of soil bacteria grown in rich nutrient media in the laboratory (7). It has been concluded that microbial populations in... 

Jannasch, H.W., 1969. Elstimation of bacterial growth rates in natural waters. J. Bac-teriol. 99 156—160. 

Meyer-Reil, L.A., 1977. Bacterial growth rates and biomass production. In G. Rhein-heimer (Editor), Microbial ecology of a brackish water environment. Ecol. Stud., 25 (16) 223-236. 

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