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Production of Indole-3-acetic acid (IAA) in 35 different symbiotic and non-symbiotic nitrogen-fixing bacteria strains isolated from soil and plant roots was studied and assayed by chromatography and colorimetric methods. These bacteria included Agrobacterium, Paenibacillus, Rhizobium, Klebsiella oxytoca, and Azotobacter. The best general medium and(More)
Production of agro-industrial waste pollutants has become a major problem for many industries. However, agro-industrial wastes also can provide alternative substrates for industry and their utilization in this manner may help solve pollution problems. The aim of this study was to isolate yeasts from wastewater treatment plants that could be used to remove(More)
Tyrosinases, copper-containing monooxygenases, are widely used enzymes for industrial, medical, and environmental applications. We report the first functional surface display of Bacillus megaterium tyrosinase on Bacillus subtilis spores using CotE as an anchor protein. Flow Cytometry was used to verify surface expression of tyrosinase on the purified(More)
Sulfur dioxide which is released from petroleum oil combustion causes pollution over the atmosphere and the soil. Biodesulfurization can be used as a complementary method of hydrodesulfurization, the common method of petroleum desulfurization in refineries. Many studies have been carried out to develop biological desulfurization of dibenzothiophene (DBT)(More)
Biofilm formation on surfaces has serious economic and environmental implications. Growth of biofilm within a water distribution system can lead to problems such as biocorrosion and biofouling accumulation. To prevent and control these occurrences, it is necessary to use suitable biocides to remove the biofilm and kill biofilm cells. In this study, the(More)
The ability of fungi to degrade aniline and its derivatives in water is reported. Several fungi are able to degrade aniline and its derivatives as a sole nitrogen, carbon and energy source. Some of these fungi were obtained from activated sludge by enrichment technique. Among the 10 studied fungi, Fusarium sp. and Rhizopus sp. utilize aniline as a sole(More)
Twenty-five crude-oil-degrading bacteria were isolated from oil-contaminated sites in the Persian Gulf and the Caspian Sea. Based on a high growth rate on crude oil and on hydrocarbon degradation ability, 11 strains were selected from the 25 isolated strains for further study. Determination of the nucleotide sequence of the 16S rRNA gene showed that these(More)
The biodegradability of a range of linear and cyclic amines was assessed. All proved to be biodegradable but there were interesting differences in their susceptibility. The least degradable was piperazine although piperazine-degrading microorganisms were of widespread occurrence in samples of water and activated sludge and, to a lesser extent, soils.(More)
Among 21 different nitrogen-fixing Bacillus isolates obtained from soil, 6 exhibited co-production of indole-3-acetic acid (IAA) and bacteriocin-like inhibitory substance (BLIS). One of these isolates was identified as Bacillus pumilus based on its phenotypical and biochemical properties as well as its 16S rRNA gene sequence; this isolate yielded 5.6(More)
Bimetallic nanoparticles are considered the next generation of nanocatalysts with increased stability and catalytic activity. Bio-supported synthesis of monometallic nanoparticles has been proposed as an environmentally friendly alternative to the conventional chemical and physical protocols. In this study we synthesize bimetallic bio-supported Pd-Au(More)