Semen is usually collected from bulls by use of an artificial vagina (AV) or by electroejaculation (EE). Semen collected by EE is often more dilute and may appear to be less motile than that collected by AV, although total sperm per ejaculate and sperm viability should be essentially similar (assuming the EE collection has been successful and complete). As fresh semen is very susceptible to env...

Zeta plus filter membranes (ZP60S) have been shown to be efficient for rotavirus concentration from wastewater and for the reduction of cytotoxicity for cell cultures. Recently a variability in both properties was observed. In view of the low costs and the high virus recovery rates obtained in the past, we re-evaluated the application of ZP60S filter membranes for virus concentration from envir...

The Guidance Manual for the Assessment of Joint Toxic Action of Chemical Mixtures (Mixtures Guidance Manual) is intended to assist environmental health scientists and toxicologists in determining whether exposure to chemical mixtures at hazardous waste sites may affect public health. The Agency for Toxic Substances and Disease Registry (ATSDR) approach is a semi-quantitative screening process. ...

Background: Nature offers an incredible diversity of chemical compounds that boast a wide array of physiological effects. Many natural substances are employed in personal care products. Which of these natural substances are hazardous ingredients? How do European legal instruments regulate natural substances with toxic effects? Results: 1,358 natural substances appear in the ‘International Nomen...

The quality of drinking water is closely related to the health condition population. In order effectively assess heavy metal environment in Guizhou Province, this paper first analyzed distribution characteristics metals water, and then used environmental risk assessment model recommended by United States Environmental Protection Agency (US EPA) investigate analyze toxic hazardous substances Pro...