We use the logistic growth model to describe the bacterium growth in the presence of a Gaussian colored noise. The effects of multiplicative colored noise on the steady state probability distribution of the bacterium growth were investigated. Our results show that increasing the strength of the multiplicative colored noise may lead to decreasing bacterium number and even bacterium extinction. O...

High salt-tolerant extracellular protease is an enzyme that plays a crucial role in industries and requires high salt conditions. Some enzymes are not resistant to conditions because they may denature under concentrations. Halophilic microbes produce stable at salts. This research has succeeded isolating several halophilic capable of producing proteases from Bledug Kuwu, Grobogan, Central Java,...

Clostridium botulinum organisms generally produce 1 of 4 neurotoxin types (A, B, E, and F) associated with human illness. Neurotoxin type determination is important in identification of the bacterium. A polymerase chain reaction (PCR) method was developed to identify 24 h botulinal cultures as potential types A, B, E, and F neurotoxin producers as well as other clostridial species which also pr...

According to the studies conducted, Bacillus cereus is a gram-positive aerobic bacterium which is able to produce spores. B. cereus is involved in formation of microflora. Currently, some strains of B. cereus are used as probiotics in animal and poultry feed. Genetic investigation is considered as an important objective of biotechnological and microbiological studies. This study compares the re...

Chloroflexus aurantiacus is an anoxygenic phototrophic bacterium. Its unique CO2 fixation pathway and primitive light-harvesting antenna complexes have attracted extensive research attentions. In this work, we investigated the photoheterotrophic growth of C. aurantiacus J-10-fl using acetate [at 55°C and without H2(g)]. The results indicate that glycine can promote anaerobic biomass production ...

An NAD(P)-dependent glutamate dehydrogenase was purified to homogeneity from the thermoacidophilic archaebacterium Sulfolobus solfataricus. The enzyme is a hexamer (subunit mass 45 kDa) which dissociates into lower states of association when submitted to gel filtration. Isoelectric focusing analysis of the purified enzyme showed a pI of 5.7 and occasionally revealed microheterogeneity. The enzy...