the effects of pesticide endosulfan (an organochlorine compound), on the ovaries of bluegill fish (lepomis macrochirus) were studied. exposures for 24 hs with histological preparations at 25% (0.25 î¼g/l), 75 % (0.75 î¼g/l), and 100 % (1 î¼g/l) sub lethal concentrations were examined. the control contained an abundance of the different stages of oocytes (oocytes i, ii, iii, and iv) and had an i...

due to importance of combination therapies in cancer treatment, this study was performed to find the effects of hyperthermia and neutron irradiation and heir combination on the human lymphocytes. blood samples were treated separately with 41.5 °c for 30 and 60 minutes, 43 °c for 15 and 30 minutes, as well as 10 cgy neutron irradiation. they also treated with hyperthermia followed by irradiation...

salinity is a major limitation ecological factor for plant development in arid and semi-arid regions. the ionic imbalance, deficiency of nutrients and degradation of plant metabolites are caused by saline conditions, are affected by the reduction ratio of potassium (k) then sodium (na). in this research foliar applications of humic acid (ha) for improve the absorption of k under salt stress was...

in this study the effect of nitric oxide synthesis inhibition on stress-induced gastric damage was evaluated in bile duel ligated, sham operated and unoperated rats. animals were injected intraperitoneally with ng-nitro-l-arginine methylester (l-name), 40 mglkg, l-argininc, 200 mg/kg or saline, 30 min before water-immersion stress. one hour after water immersion, the animals were killed and the...

use of different pesticides in the agriculture sector, in order to boost crop yield within a short time period and low labor, has been tremendously increased since the last decade. pesticide use has elevated crop yield but has produced a number of pronounced problems regarding environmental and health safety. the continuously deteriorating toxicological effects of these pesticides are not only ...

background: occupational and environmental exposures mostly represent complex mixture of genotoxic agents, however there is a wide variation in the specificity of biomarkers. exploration of correlations among biomarkers contributes to the further progress of molecular cancer epidemiology and to the selection of the optimal biomarkers for the investigation of human exposure to carcinogens. the a...

the purpose of this study was to survey impacts of drought on socio-economic conditions of guilan paddy farmers. besides recognizing these impacts, it ranked them according to the viewpoint of the paddy farmers. it was of the descriptive- correlation type. questionnaire was the main tool of this study. to determine the validity of questionnaire used of comments of panel experts and reliability ...

an improved model of mud dispersion has been introduced in this work. the advantages of this model consist of a new analytical correlation for dispersivity by using resistivity log data and using a new aspect of capacitance dispersion model. mathematical formulations were expressed, solved by numerical model taking advantage of actual log and formation data. achieved results yielded reasonable ...

The first results obtained using a SOI device for microdosimetry applications are presented. Microbeam and broadbeam spectroscopy methods are used for determining minority carrier lifetime and radiation damage constants. A spectroscopy model is presented which includes the majority of effects that impact spectral resolution. Charge collection statistics were found to substantially affect spectr...