in this study, 5,10,15,20-tetrakis(4-nitrophenyl)porphyrin (tnpp) and its zinc porphyrin complex (zntnpp) were synthesized in situ using the microwave method and identified by uv-vis, ft-ir and 1h nmr. the photostability and photodynamic antimicrobial activity (pact) of these compounds were investigated on pseudomonas aeruginosa and bacillus subtilis under visible light irradiation. mic, mbc an...

the present study was undertaken to screen the soil samples collected in iran for the presence of the bacillus subtilis lipase a gene. the bacterial colonies obtained from the collected soil samples were examined by physical appearance, biochemical tests and  the polymerase chain reaction (pcr). only four colonies were identified as putative b. subtilis strains and all contained the lipase a ge...

bacillus subtilis k40b was isolated from rice rhizospheres and its potential for production of xylanase was evaluated using biochemical methods. the gene for xylanase in b. subtilis k40b was amplified, sequenced and assigned to the ncbi genebank. the gene size was estimated to be 563 bp encoding 413 amino acids. comparison of the xylanase gene with reference sequences showed that the xylanase o...

background: dielectric barrier discharge (dbd), a source of non-thermal plasma, is used in surface decontamination. objective: to study the effect of dbd plasma treatment, we evaluated the effect of plasma exposure time on inactivation of bacillus subtilis. results: applying the dbd plasma to the culture of b. subtilis caused complete sterilization of the surface without any thermal effects. in...

using environmental-friendly methods in order to remove or reduce oil pollutants and their derivations in the environment are developing. in this study, the biodegrading ability of bacillus subtilis .sp which has been separated from oil-polluted soil was examined. it was revealed that it can reduce surface tension of growth medium and produce bio-surfactant at 37 and 20 degrees centigrade. also...

the removal of disulfide oil (dso) from contaminated soil was studied by the bioremediation method and the influence of electrokinetic on the bioremediation process was investigated. the bacillus subtilis strain was used in the bioremediation process. the effects of humidity, time and dso concentration in soil was studied. the experimental results for the bioremediation of dso show, the removal...

A cloned chemotaxis operon has been characterized. Thirteen representative che mutations from different complementation groups were localized on the physical map by recombination experiments. The use of integration plasmids established that at least 10 of these complementation groups within this locus are cotranscribed. An additional three complementation groups may form part of the same transc...

During the last 10 years the subject of bacterial spore germination has been intensively investigated. In most of these studies it has been found that bacterial spores are capable of germination under conditions which do not permit the germinated form to survive (Schmidt, 1955; Stedman, 1956). Hills (1949) pointed out that a distinction must be drawn between the requirements for germination and...

Bacillus subtilis has found to respond the signals of environmental and metabolic stress by inducing over 40 general stress genes which are under the control of the sigma B transcription factor. Sigma B is an alternative sigma-factor in Bacillus subtilis. It mediates the response of the cell to a variety of physical insults. General stress response of Bacillus subtilis is regulated directly by ...