March 2013
The multivesicular body pathway: A newly discovered battlefield for gameplay between virus and host
The main protein components of the multivesicular body (MVB) pathway include endosomal sorting complexes required for transport (ESCRT) and vacuolar protein sorting 4 (VPS4). Recent studies revealed that late domain motifs of enveloped viruses, such as PTAP, YPxL and PPxY (x indicates any amino acid residues), can bind separately to tumor susceptibility gene 101 (TSG101), ALG-2-interacting protein X (ALIX) and neuronal...
March 2013
Feeding of L-phenylalanine as precursor enhances strobilurin A biosynthesis in the basidiomycte, Strobilurus tenacellus
In this study, the effect of different concentrations of L-phenylalanine (0, 0.10, 0.25, 0.50, 1 and 2 mM) was used as a precursor to enhance antifungal natural product strobilurin A, which was investigated in the fungus Strobilurus tenacellus. The putative precursor was added to the fungal shake flask culture and the concentration of strobilurin A was quantified by liquid chromatography and mass spectroscopy...
March 2013
Pathogenicity of native isolates of Isaria fumosorosea (Deuteromycotina: Hyphomycetes) on immature whitefly Bemisia tabaci Gennadius (Hemiptera: Aleyrodidae) and their genetic variability
The use of chemical insecticides to manage Bemisia tabaci has caused serious damage to the environment and has also selected resistant populations. The use of biological control agents, such as entomopathogenic fungi is an excellent component of integrated pest management programs. In the present study, the virulence of four native isolates (Pf-Tim, Pf-Tiz, Pf-Hal and Pf-Tic), as well as a commercial strain...
March 2013
Effects of anti-hypertension and intestinal microflora of spontaneously hypertensive rats fed gamma-aminobutyric acid-enriched Chingshey purple sweet potato fermented milk by lactic acid bacteria
This study investigated the anti-hypertensive effect of gamma-aminobutyric acid (GABA)-rich Chingshey purple sweet potato (CPSP) fermented-milk with three different lactic acid bacteria (LAB) strains including Lactobacillus acidophilus BCRC 14065, Lactobacillus delbrueckii ssp. lactis BCRC 12256, and Lactobacillus gasseri BCRC 14619. In a chronic administration study, the...
March 2013
Decolorization of indigo dye and indigo dye-containing textile effluent by Ganoderma weberianum
Many natural and synthetic dyes present in industrial effluents are resistant to degradation by conventional treatments. The decolorization of indigo dye and indigo dye-containing textile wastewater was carried out using the newly isolated ligninolytic fungus strainGanoderma weberianum TZC1. This strain was shown to decolorize both indigo dye and its effluents efficiently; the optimal pH and temperature ranges...
March 2013
Evaluation of plant growth-promoting traits of Burkholderia and Rhizobium strains isolated from Amazon soils for their co-inoculation in common bean
Several processes that promote plant growth were investigated in diazotrophic bacteria isolated from soils of various land-use systems in the western Amazon region using siratro and bean as the trap species. The processes observed in the 17 studied strains were as follows: Inhibition of phytopathogenic fungal growth; free-living nitrogen fixation in semi-solid nitrogen-free LO medium; solubilisation of insoluble calcium...
March 2013
Newcastle disease in layers: Preliminary studies on the stress associated with onset of lay and initiation of clinical disease
Newcastle disease is endemic in Nigeria and there are reports of frequent outbreaks both in village and commercial poultry population. Of particular importance and interest is the report in layers particularly at the commencement of production up to peak hen day production. This paper reports preliminary investigations on onset of lay and the development of clinical Newcastle disease. It combined complaints as recorded...
March 2013
Production of vitamin B12 and folic acid from agricultural wastes using new bacterial isolates
The rate and optimum conditions for production of vitamin B12 and folic acid from a mixture of agricultural wastes, rice bran and wheat straw was studied with new bacterial isolates, using solid-state fermentation (SSF). The isolates Klebsiella pneumoniae andCitrobacter freundii showed the highest yields of 38.74 and 45.21 µg/l for vitamin B12 and folic acid, respectively, from...
March 2013
Screening for nematicidal activities of Beauveria bassiana and associated fungus using culture filtrate
Using dilution and tissue block isolation methods, we obtained 105 isolates of Beauveria bassiana and seven isolates of its associated fungus. The filtrate of fermentation fluid of these isolates was tested for nematicidal activities against four targeted nematode species. Results indicate that nine isolates had high nematicidal activities against four targeted nematodes. Studies show that the culture...
March 2013
Antibacterial effect of hypericin
Developing resistance to several antibiotics has a crucial importance. For this reason, researchers are trying to discover alternative methods or agents. More recent studies focused on the potential antimicrobial properties of hypericin. In this study, antibacterial activity of hypericin was tested against Pseudomonas aeruginosa ATCC 27853, Enterococcus faecalis ATCC 19433, Escherichia coli ATCC 25922,...
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