background: male are involved in near 50% of cases of infertility and reactive oxygen species (ros) playing an important role in decreasing fertility potential. accurate measurement of ros seems to be important in evaluation of infertile male patients. objective: to compare ros measurement in neat and washed semen samples of infertile men and define the best method for evaluation of ros in thes...

One day in my life concerning coal quality has struck me more than most. We asked a group of utility and power plant people what properties of coal they liked and what caused them concern. As each person provided their response you could see that each had their own view. Some wanted dustless coal, others coal that has good flow through chutes. Many wanted large, lumpy coals, the engineers wante...