November 2012
Microbial degradation of toluene
Zephirus environment is polluted by the toluene from profuse range industries. In spite of positive potential application, toluene results in many mishaps especially health hazards; hence amputation of toluene is crucial for human welfare as well as environmental issues. This review deals with destruction of toluene using microbial degradation. The overall aerobic biodegradation of toluene into carbon dioxide, water and...
November 2012
Characterization of some enzymatic properties of recombinant a-glucosidase III from the Thai honeybee, Apis cerana indica Fabricus
Recombinant a-glucosidase III (rHBGase III) from Apis cerana indica Fabricus (rAciHBGase III) was expressed in the yeast Pichia pastoris GS115, enriched and characterized. The full length cDNA of AciHbgase III (~1.8 kb) was amplified by RT-PCR, cloned into the pPICZaA expression vector and used to transform P. pastorisGS115. The maximum secreted expression level of rAciHBGase III...
November 2012
Genetic diversity and DNA fingerprint study in tomato (Solanum lycopersicum L) cultivars grown in Egypt using simple sequence repeats (SSR) markers
A collection of ten cultivars of tomato grown in Egypt were screened with 20 simple sequence repeat (SSR) primers in order to determine genetic identities, genetic diversity and genetic relationships among these cultivars. On an average, 38 alleles were amplified using SSR primers with scorable fragment sizes ranging from approximately 75 to 275 bp. 23 alleles were polymorphic thus revealing 60.5% of polymorphism. The...
November 2012
Antioxidative and physiological studies on Colocasia esculentum in response to arsenic stress
The current study was undertaken to determine the effects of arsenic on Colocasia esculentum. Rhizomes were grown in pots containing 2.5 kg of garden soil with increasing concentration of arsenic. Arsenic accumulation was more in shoots compared to roots at higher concentrations. High arsenic concentration caused reduction in plant growth along with induction of few antioxidants. C. esculentum has a...
November 2012
Biological control of Meloidogyne incognita by Trichoderma harzianum and Serratia marcescens and their related enzymatic changes in tomato roots
Biological control against the root-knot nematode, Meloidogyne incognita was proven to occur in tomato, Solanum lycopersicom, soil-drenched with different isolates ofTrichoderma harzianum and a commercial suspension of Serratia marcescens(Nemaless). The potential of such biocontrol agents to trigger plant defense response was discussed. Nematode reproduction in the presence of such...
November 2012
Accumulation pattern of total nonstructural carbohydrate in strawberry runner plants and its influence on plant growth and fruit production
The pattern of total nonstructural carbohydrate (TNC) accumulation in strawberry (Fragaria ananassa Duch.) nursery runner plants, cv. ‘Camarosa’, was determined for three growing seasons. Plant growth and fruit production patterns were also evaluated. The experiments were carried out on plants propagated in high latitude (41°50' N) and high elevation (1292 m) nurseries in Siskiyou County,...
November 2012
Analysis of phthalate esters contamination in drinking water samples
Phthalate esters are widely used as plasticizer. They can migrate from plastic materials to the environment. Exposure to some of these compounds may increase the risk of getting cancer. Phthalate esters: dimethyl phthalate (DMP), diethyl phthalate (DEP), dibutyl phthalate (DBP) and bis(2-ethylhexyl) phthalate (DEHP) were extracted simultaneously using a solid-phase extraction and compared with liquid-liquid extraction...
November 2012
Manipulating nutrient composition of microalgal growth media to improve biomass yield and lipid content of Micractinium pusillum
Biodiesel production from microalgae depends on the algal biomass and lipid content. Both biomass production and lipid accumulation are limited by several factors in which nutrients play a key role. We investigated the influences of micronutrients on biomass, and lipid content of Micractinium pusillum GU732425 cultivated in bold basal media (BBM). The average dry biomass of microalgal strain in control medium...
November 2012
Histological changes and biochemical parameters in the hepatopancreas of terrestrial gastropod Helix aspersa as biomarkers of neonicotinoid insecticide exposure
In this study, adult snails, Helix aspersa were used to estimate the effect of aneonicotinoid insecticide (thiametoxam) on biochemical parameters and histological changes in the hepatopancreas of this gastropod after a treatment of six weeks. During this period, snails were exposed by ingestion and contact to fresh lettuce leaves which were soaked with an insecticide solution. The thiametoxam test...
November 2012
Antimicrobial resistance and plasmid profiles of Aeromonas hydrophila isolated from River Njoro, Kenya
The purpose of this study was to investigate the presence of Aeromonas hydrophila at commonly used water collection points on the River Njoro and to determine the in-vitro antimicrobial susceptibility and plasmid profiles of isolates. In total, 126 samples were collected and 36.5% of them were positive for A. hydrophila. The A. hydrophilawere recovered on membrane filters,...
November 2012
Genetic differentiation and gene flow between the Tunisian ovine breeds Barbarine and Western thin tail using random amplified polymorphic DNA-polymerase chain reaction (RAPD-PCR) analysis
Sheep is an important livestock species of Tunisia. They contribute greatly to the food safety of the country and in the livelihood of a large number of small and marginal farmers and landless labourers engaged in sheep rearing. In this study, random amplified polymorphic DNA-polymerase chain reaction (RAPD-PCR) analysis was used to assess the genetic difference and gene flow among two Tunisian sheep breeds (the...
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