A possible hazard

Re: Human papillomavirus sperm infection and assisted reproduction: a dangerous hazard with a possible safe solution.

BACKGROUND Human papillomavirus (HPV) infection has been demonstrated in the sperm of a large percentage of sexually active males and is associated with an impairment of sperm parameters, with a particular negative impact on sperm motility, suggesting a possible role in male infertility. Conventional sperm selection techniques have a low efficiency in removing HPV. METHODS Evaluation of sperm...

Handman hazard for the host . murine cutaneous leishmaniasis : a possible Persistence of virulent Leishmania

Addition of steroids in medicated dentrifices marketed in Pakistan: a possible serious health hazard.

OBJECTIVE To determine whether some dentrifices contain steroids. MATERIALS AND METHODS Samples of 20 brands claiming to have any medicinal benefit and readily available in the open market were submitted for testing for the presence of steroids to the Pakistan Council of Scientific and Industrial Research Laboratories, Karachi. RESULTS Eight samples tested positive on the first test and sev...

Asbestos-a New Hazard

In recent years there has been an increase in the incidence of a rare malignant tumour—mesothelioma— affecting the lining of the lung or abdominal organs. The evidence points to a relationship between the occurrence of this tumour and exposure to asbestos, and in some cases the exposure need only be slight both in intensity and in duration. This means that not only the manufacturing, but also t...

HAZARD I: Software for Fire Hazard Assessment

NIST Handbook 146, HAZARD I—Fire Hazard Assessment Method [1], represents the culmination of a long-term program aimed at placing the prediction of fire outcomes on an objective and scientific basis. In the 1970s, NIST supported Harvard University to develop numerical models that could predict the temperature in a room containing a fire. These early models were difficult to use and interpret; r...