Factors Limiting Bacterial Growth

Factors Limiting Bacterial Growth: IV. The Age of the Parent Culture and the Rate of Growth of Transplants of Escherichia coli.

Rapid method of determining factors limiting bacterial growth in soil.

A technique to determine which nutrients limit bacterial growth in soil was developed. The method was based on measuring the thymidine incorporation rate of bacteria after the addition of C, N, and P in different combinations to soil samples. First, the thymidine incorporation method was tested in two different soils: an agricultural soil and a forest humus soil. Carbon (as glucose) was found t...

Factors limiting heterotrophic bacterial production in the southern Pacific Ocean

The role of potential factors limiting bacterial growth was investigated along vertical and longitudinal gradients across the South Eastern Pacific Gyre. The effects of glucose, nitrate, ammonium and phosphate additions on heterotrophic bacterial production (using leucine technique) were studied in parallel in unfiltered seawater samples incubated under natural daily irradiance. The enrichments...

Assessment of effective factors on bacterial oxidation of ferrous iron by focusing on sweetening natural gas

In this study, the effects of some factors on bacterial growth and ferrous oxidation rates were investigated by Acidithiobacillus ferrooxidan in 250 ml shake flasks. One factor at a time (OFAT) design approach was used for preliminary evaluation of various factors affecting the process, such as pH, initial ferrous and elemental sulfur concentrations, shaker agitation rate, and liquid to flask v...

A Combination of Extreme Environmental Conditions Favor the Prevalence of Endospore-Forming Firmicutes

Environmental conditions unsuitable for microbial growth are the rule rather than the exception in most habitats. In response to this, microorganisms have developed various strategies to withstand environmental conditions that limit active growth. Endospore-forming Firmicutes (EFF) deploy a myriad of survival strategies in order to resist adverse conditions. Like many bacterial groups, they can...

Influence of bacteria on phytoplankton cell mortality with phosphorus or nitrogen as the algal-growth-limiting nutrient

The effects of bacteria on phytoplankton mortality were studied with phosphorus or nitrogen as the algal-growth-limiting nutrients. Experiments were performed with the &atom Ditylum brightwellii using batch cultures, steady state continuous cultures and batch-mode cultures which were starved for the limiting nutrient after being preconditioned in a chemostat. With phosphorus limiting algal grow...