December 2012
The effect of ion charge-mass ratio on adsorption of heavy metals on magnetotactic bacteria
The magnetotactic bacteria have the properties of both capturing heavy metal ions and being quickly separated out from the wastewater, which makes them high quality adsorbents. The adsorption of ions usually shows selectivity in the multi component aqueous solutions. This paper investigated the mechanism of adsorption selectivity using the molecular dynamics method on the basis of periodic law of elements. A universal...
December 2012
A new endophytic Paraconiothyrium brasiliens LT161 shows potential in producing antifungal metabolites against phytopathogens
A new endophytic strain of Paraconiothyrium brasiliens LT161 was isolated from the healthy stems of Cinamonum camphora collected from Nanjing, China, and was identified based on morphological characteristics and internal transcribed spacer (ITS) sequence analysis. The culture filtrate and its ethyl acetate extract of strain LT161 showed strong growth inhibition activity in...
December 2012
Identification of genes involved in long-term survival in Pseudomonas aeruginosa PAO1
Pseudomonas aeruginosa is a remarkably adaptable organism which is able to survive and persist under a broad range of environmental conditions. The traditional views of bacterial growth phases usually come from standard laboratory cultures which can be different from natural conditions. In many natural environments, bacteria could maintain a long-term surviving status. To understand bacterial long-term survival, a...
December 2012
Kinetics biodegradation of triazophos by Klebsiella oxytoca TDB-1
A triazophos (TAP)-degrading bacterial strain, Klebsiella oxytoca TDB-1, which could use TAP as sole carbon source, was isolated by enrichment culture technology. The growth characteristics of strain TDB-1 with pressure of TAP were tested, and the results show that optimum growth condition was at 30°C, pH 8 and 2% (v/v) inoculation. Strain TDB-1 was great promise in TAP biodegradation for extreme...
December 2012
Morphologial, physiological and phylogenetic characterization and functional verification of an anaerobic strain SN22-2 with simultaneous capabilities of denitrification and sulfate reduction
Anaerobic bacterium (strain SN22-2) with simultaneous capabilities of denitrification and sulfate reduction was enriched and isolated in a specially designed medium by anaerobic Hungate technology. The characterisation of SN22-2 was conducted from the morphological, physiological and phylogenetic aspects. It was a rod-shaped, gram-negative, 0.2 to 0.7 µm in width and 3.0 to 5.5 µm in length. Most of the...
December 2012
Dimethoate degradation and calcium phosphate formation induced by Aspergillus niger
A novel method of dimethoate degradation using the fungus Aspergillus niger wasproposed. In addition, calcium phosphate was obtained as a byproduct from the organophosphate pesticide by inductive synthesis. The method involves culturing A. nigerin a modified Czapek liquid medium with glass powder, CaCl2, and dimethoate. Gas chromatography was subsequently used to analyze the...
December 2012
Study on feed fermented from seaweed waste
This paper focuses on several factors on the effect of fermented feed from seaweed waste. The fermentation process is optimized through nutritional analysis. The study which compared the crude protein and the crude fiber resulted to an increase by 34.56% and decreased by 10.72%, respectively in seaweed feed. The findings of this study suggest that the best feed could be fermented from seaweed waste while adding 1% of...
December 2012
Isolation of biphenyl-degrading microorganism and its cometabolic transformation of polychlorinated biphenyls (PCBs)
Polychlorinated biphenyls (PCBs) are ubiquitous pollutions that cause public concern due to their long persistence, low degradability, strong bioaccumulation and high toxicity in the environment. A bacterium strain G-2 was isolated from an activated sludge of a chemical factory wastewater treatment plant in China. Based on its phenotypic typing coupled with 16S rRNA gene analysis, the strain was classified...
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