During recent years several attempts have been made to incorporate environmental and natural resources degradation into national accounts. GNP as measured by the traditional system of national accounts does not consider environmental degradation caused by inefficient exploitation of natural resources. While the complete omission of environmental impacts is not possible, there could be an optima...

environmental impact assessment (ela) today is a planning tool that is used for the prediction of environmental impacts. there are several methods to assess environmental impacts in the world and iran as well. among them system analysis approach using degradation model (makhdoum, 1996) has shown it's effectiveness. degradation model is used at different levels including the basin , catchme...

     In recent years, large rangeland areas have been destroyed for various reasons, so that its negative impacts on local people's income and sustainable livelihood are become significant. Due to the fact that signs of negative or downward trends in the rangelands condition are being revealed prior to the complete degradation, a study was done to identify these sings and evaluate their importa...

results the pcr approved the bacillus genus of the isolates. the strain of bacillus subtilis was identified using biochemical tests. 40 ºc and ph 11 are the optimum condition for maximum keratinase enzyme activity. objectives the aim of this study was the isolation of feather degrading bacillus spp.from a poultry waste and the optimization of conditions for the highest enzyme activity and feath...

a method for the degradation of pyrrolidine in water is described. the method relaies on the photocatalytic degradation of pyrrolidine to co2 and nh3 by uv irradiation and using titanium dixide semiconductor as a photocatalyst. compared with direct photolysis, the semiconductor catalytic photolysis gave consistently higher degradation yields for pyrrolidine in water. the effects of variable par...

india has large resources of natural fibres such as banana, khus, sisal, korai grass,talipot, palm leaf, coconut, pineapple, screwpine, golden grass, jute and sabaiamong others. in the past, trade of the village folk depended on harvesting fibresgrown in their villages. natural fibers have recently gaining attraction of researchersdue to their low cost eco-friendly and biodegradability characte...

a capillary electrophoresis method was used for assay of some degradation products of carvedilol. the optimized parameters were as; running buffer 80 mm acetate dissolved in methanol/ethanol mixture (65:35 v/v), applied voltage of 19 kv, temperature is 20 ºc and the wavelength range of 200-350 nm. the results indicate that the proposed ce method could effectively separate carvedilol from its de...

the entire land in the southern iran faces problems arising out of various types of land degradation, of which the vegetation type forms one of the major ones. the payab basin (522,470 ha), which covers the lower reaches of mond river, was chosen for a test risk assessment of this type. the different kinds of data for indicators of vegetation degradation were taken from the records and publishe...

the aim of this study was to degrade furfural by a new nanotube system. to degrade some organic pollutants as well as to reduce the amount of furfural which is a well-known pollutant in oil industry, the photocatalytic process along with ultraviolet (uv) irradiation may be employed. in this study, the uv/tio2/pd system in which the nanoparticles of palladium doped into the titanium dioxide was ...

An essential part of gene expression is the coordination of RNA synthesis and degradation, which occurs in the same cellular compartment in bacteria. Here, we report a genome-wide RNA degradation study in Escherichia coli using RNA-seq, and present evidence that the stereotypical exponential RNA decay curve obtained using initiation inhibitor, rifampicin, consists of two phases: residual RNA sy...