this is the first report about adverse inhibitory effect of v-guard and e-guard gasoline additives against soil beneficial streptomyces. v-guard and e-guard gasoline additives are anti valve seat recession agents used in unleaded gas for old car engines in iran. they contaminate soil and groundwater by fuel leaks and spills. streptomyces are of the major contributors to the biological buffering...

Study of the effect of pesticides on soil micro flora and their beneficial activities forms an important part of the pesticides risk assessment . The intensive use of these pesticides in agricultural soils, there may be an interaction with soil micro flora and their metabolic activities besides, controlling the different pest population (Baxter and Cummings, 2008). Therefore the behavior of the...

Experiments were carried out in the field and laboratory during 2001-02 to study the persistence of three herbicides, namely butachlor, pretilachlor (Rifit) and 2,4-D in a rice – rice system and the effect of their residues on soil micro flora. Irrespective of the seasons and treatments, all the three herbicides dissipated quickly from soil and no residues were detected at the time of harvest. ...

The rapid expansion of deserts in recent decades as a result of human actions combined with climatic disasters has highlighted the necessity to understand biological processes in arid environments. Whereas physical processes and the biology of flora and fauna have been relatively well studied in marginally used arid areas, knowledge of desert soil micro-organisms remains fragmentary. This chapt...

Tundra micro flora show the same low species diversity evident among the plants and herbivores. Two groups with broadly different dynamics dominate the micro flora: rapidly changing bacterial populations that typically degrade smaller molecular compounds and more slowly changing fungal populations that are more capable of degrading larger molecules. The accumulation of orga,nic matter in tundra...

Arbuscular mycorrhizal fungi are key components of soil micro-flora and obviously interact with other microorganisms in the rhizosphere which is the zone of influence of plant roots on microbial populations and other soil constituents. Keeping in view the importance of AM fungi, the present study was undertaken for assessing the AM fungal spore population dynamics in the rhizosphere soil and it...

This study investigated biodegradation of dibenzothiophene (DBT) in marsh soil spiked bywhite-rot fungus Phanerochaete chrysosporium. Soil samples were spiked with 100 ppm DBTand incubated at 30°C in a dark chamber for 30 days. Samples were evaluated for pH, Mnperoxidaseactivity, sulfate ion concentration and growth during the tests. Results showedmaximum levels of pH, Mn-peroxidase and sulfate...

this study investigated biodegradation of dibenzothiophene (dbt) in marsh soil spiked bywhite-rot fungus phanerochaete chrysosporium. soil samples were spiked with 100 ppm dbtand incubated at 30°c in a dark chamber for 30 days. samples were evaluated for ph, mnperoxidaseactivity, sulfate ion concentration and growth during the tests. results showedmaximum levels of ph, mn-peroxidase and sulfate...

in order to investigate antioxidant and antimicrobial effects of pomegranate peel powder (ppp), this research was conducted as completely randomized design arranged in a 2 × 2 factorial experiment using pomegranate peel powder (0 and 2 percent) and soybean oil (so, zero and six percent in growing period; zero and eight percent in finishing period). one hundred and sixty 11-day-old ross 308 broi...

background: increase in prevalence of obesity and type 2 diabetes which are of the main risk factors of metabolic syndrome, is not only the result of changes in genetic, diet or physical activity, but also an imbalance of micro flora may play an important role. therefore, alteration of micro flora using pre/probiotic is considered as a new strategy for treatment of metabolic disorders.   method...