One of the most important challenges in fight against cancer is acquired drug resistance. P-glycoprotein (P-gp), encoded by ABCB1 gene many organs, one factors involved development P-gp mainly efflux toxic substances such as xenobiotics from cell. In addition to these, it also plays a role drugs used treatment cancer, rate success reduces. Phenolic compounds are chemicals that naturally synthes...

Southern California caged layer operations were visited over 3 yr. Northern fowl mites from 26 field populations were tested for acaricide resistance using a capillary pipette and glass dish bioassay. One was a susceptible field population with no pesticide exposure for over 30 yr (reference site for resistance ratio calculation). Technical and commercial formulations of malathion, carbaryl (Se...

In reality, humans are always exposed to a combination of toxic substances and seldom to a single agent. Simultaneous exposure to a multitude of chemicals could result in unexpected consequences. The combined risk may lead to greater or less than a simple summation of the effects induced by chemicals given individually. Here, a method is proposed for estimating the cumulative risk which is the ...

polybrominated diphenyl ethers as flame retardants prevent the branching mechanism of free radicals in gas phase during the combustion. therefore, they are used in electric and electronical instruments. these supplies are entering the landfills after use. the existing flame retardants in these landfills enter the air, water and soil and pollute them. in this paper a mass-transfer model is devel...

Background: Gas refining is a process in which workers are exposed to different chemicals. This study aimed to assess the health risks caused by exposure to these substances in order to determine hazardous jobs and to present controlling methods. Materials and Methods: This cross-sectional study was performed on the workers at gas refinery in 2015. The sample included all the staff in operat...

Abstract World population is increasing at a tremendous rate so the demand for animal-based protein. Aquaculture promising industry that has potential to supply high quality protein mankind with minimum environmental impact. In past decade, aquaculture practices have been shifting from extensive intensive culture. To achieve maximum production per unit area, stocking densities are maintained in...

Wood modification is an excellent and increasingly used method to expand the application of woody materials. Traditional methods, such as chemical or thermal, have been developed for targeted improvement some selected properties, unfortunately typically at expense others. These methods generally alter composition wood, thus its mechanical enhance dimensional stability, water resistance, decreas...