Lethal effects of 60Co gamma-rays, UV light, and mitomycin C on two kinds of bacteria, Halobacterium salinarium which grows in highly concentrated salt media and Thiobacillus intermedius which requires reduced sulfur compounds, were studied and compared with those on Escherichia coli B/r. D37 values for H. salinarium, T. intermedius and E. coli B/r were 393, 150, and 92 Gy, respectively, by exp...

Laboratoire de Chirnie Bact&ienne, lnstitut de Biologie Structurale et de Microbiologie, 31 chemin Joseph Aiguier, 13402 Marseille C dex 2of France The alas gene of Thiobacillus ferrooxidans has been cloned and sequenced and its expression in Escherichia coli and T. fermoxidans analysed. The same genOmiC Organization to that in Em COli (I'ed-recX-ahS) has been found in T. ferrooxidans. The r e ...

Pure and mixed cultures of Methylophaga sulfidovorans and Thiobacillus thioparus T5 were grown in continuous cultures on either dimethyl sulfide, dimethyl sulfide and H(inf2)S, or H(inf2)S and methanol. In pure cultures, M. sulfidovorans showed a lower affinity for sulfide than T. thioparus T5. Mixed cultures, grown on dimethyl sulfide, showed coexistence of both species. M. sulfidovorans fully...

The Mouteh refractory pyrite concentrates at pulp densities of 1.5%, 3%, 4.5% and 6% were treated, using Thiobacillus ferrooxidans DSM 581 and the same bacteria adapted on the Mouteh pyritic concentrate. Compared with a non-adapted culture, use of an adapted inoculum of T. ferrooxidans increased bioleaching rate of iron by a factor of 1.940, 2.011, 1.859 and 1.559 for pulp densities 1.5%, 3%, 4...

The overuse of chemical fertilizers has caused various ecological problems in China, necessitating the development organic alternative fertilizers. There are few studies on rapidly emerging fertilizer rapeseed green manure, despite importance understanding its decomposition efficiency and impact soil. In this study, using plant residue from 14 cultivars, we examined 30-day changes under conditi...

It has only recently been discovered that naturally prevailing microorganisms have a notable role in flotation addition to chemical process parameters and overall water quality. This study’s aim was assess the microbial communities relation chemistry zinc copper mineral plant. Due limitations of cultivation-based methods detect fraction total diversity, DNA-based were utilised. However, it DNA ...

Elemental sulfur-driven autotrophic denitrification (S0dAD) was applied in a packed-bed reactor to remove residual nitrogen from raw mature landfill leachate after partial nitritation and anaerobic ammonium oxidation (anammox) (PN/A) pretreatment. The performance stability of S0dAD were evaluated with different NOx? (nitrate nitrite) loadings hydraulic retention time (HRT) at 15–28 °C over an o...

the effects of inoculation of thiobacillus and the type of nitrogen fertilization (urea and ammonium sulphate fertilizers) on yield and yield components of rapeseed cultivars (okapi, slm 046 and reagent * cobra) were studied. the experiment was carried out as spilit plot factorial in randomized complete block design with 4 replications in shahrood university of technology. reagent * cobra culti...

We investigated the production and regeneration of Thiobacillus ferrooxidans spheroplasts. Regeneration frequencies of up to 90% reversion were obtained. Attempts to transform T. ferrooxidans spheroplasts with a recombinant T. ferrooxidans plasmid were unsuccessful.

Background: The aim of this study was to investigate the frequency and type of bacteria resistant to chloramphenicol (CHL), erythromycin (E), and sulfamethoxazole (SXT) antibiotics from untreated wastewater effluents to receiving river. Methods: In total, 32 samples were taken from eight sites located in the raw wastewater to the downstream of the receiving Ghotor river in Khoy city. Resistant...