background: existence of bacterial host cell dna contamination in biopharmaceutical products is a potential risk factor for patients receiving these drugs. hence, the quantity of contamination must be controlled under the regulatory standards. although different methods such as hybridization assays have been employed to determine dna impurities, these methods are labor, intensive and rather exp...

The level of virus contamination on sweetpotato germplasm resources in Ethiopia was determined. Sweetpotato (Ipomea batatus) accessions in fields at Awassa and Wondo Genet Research Stations had 85% typical virus symptoms with up to 100% incidence. The associated viruses were identified by Enzyme-linked immunosorbent assay (ELISA). Accordingly, out of 57 accessions serologically tested from Awas...

Naturally occurring radon in ground water can potentially be used as an in situ partitioning tracer to characterize dense nonaqueous phase liquid (DNAPL) saturations. The static method involves comparing radon concentrations in water samples from DNAPL-contaminated and noncontaminated portions of an aquifer, while the push-pull method involves the injection (push) and extraction (pull) of a rad...

background cereal products are susceptible to mould damage during pre- and post-harvesting stages of the production. the regional specificity of golestan province in the northern region of of iran, with its high temperature and high relative humidity, acts as a leading factor for the growth of aflatoxin-producing fungi. it is well known that contamination of starch-based ingredients with mycoto...

Item analysis is performed by developers as an integral part of the scale development process. Thus, items are excluded from depending on item prior to factor analysis. Existing discrimination indices calculated based correlation, yet with different response patterns likely have a similar index. This study proposed new index that can be used in Likert type scales and examined its effect results...

The exposure of heavy metals to lake bed sediment of scenic areas may pose risks on aquatic ecosystems and human health, however very few studies on risk assessment have been reported for scenic areas. Accordingly, this study determined concentration levels, and assessed contamination characteristics and risks, of heavy metals in lake bed sediment of National Scenic Areas Songhuahu (NSAS) in Ch...

the aim of this study was to determine the environmental risk of pesticide a.i. applied to control insects and fungus in cereal farming in sanliurfa, turkey. in 2013, 8 active ingredients (a.i.) in cereal farming were applied for insect and fungus control in sanliurfa, turkey. these a.i. were alpha-cypermethrin(ec), chlorpyrifos(ec;wp), difenoconazole(ec), indoxacarb(wg), lambda-cyhalothrin(ec)...