It is known that a number of toxic substances produce myocardial injury by several mechanisms involving interruption of coronary blood flow due to stimulation of clotting mechanism and coronary vasospasm. Number of toxic substances may cause direct myocardial toxicity independent of coronary blood flow. Acute myocardial injury due to stings and bites is a rare entity and not well understood. He...

Abstract Today the use of heavy metals can be found in almost all aspects life. However, causes a process bioaccumulation toxins from into body. One type metal that is very toxic Mercury (Hg). According to list hazardous substances published by Agency for Toxic Substances and Disease Registry (ATSDR), mercury occupies third position among 275 harmful human health. The metrology laboratory funct...

1. A single intravenous injection into dogs of a sufficient number of freshly washed typhoid bacteria produces the symptoms and pathology that characterize anaphylaxis in these animals. 2. These effects are not produced by the coagulable protein-free filtrate from a fresh emulsion, while a similar filtrate from an emulsion digested with leucoprotease is very potent, the toxic portion of the bac...

Section 5 of the Toxic Substances Control Act (TSCA) requires that manufacturers and importers of new chemicals must submit a Premanufacture Notification (PMN) to the U.S. Environmental Protection Agency 90 days before they intend to commence manufacture or import. Certain information such as chemical identity, uses, etc., must be included in the notification. The submission of test data on the...

THE ENVIRONMENTAL CONTAMINANTS WHICH HAVE THEIR MAJOR EFFECTS ON THE SMALL INTESTINE MAY BE CLASSIFIED INTO FIVE MAJOR CATEGORIES: (1) bacterial, viral, and parasitic agents, (2) food and plant substances, (3) environmental and industrial products, (4) pharmaceutical agents, and (5) toxic agents whose metabolic effects are dependent on interreaction with intestinal bacterial flora, other physic...

The National Toxicology Program (NTP), an interagency program headquartered at the National Institute of Environmental Health Sciences (NIEHS), carries out a broad range of toxicology research and testing and serves as a resource for identification of substances in our environment that are hazards for human health. One of the ways that the NTP identifies hazards is through carrying out literatu...

We consider the relationship between location choices of potentially polluting firms and local income. Unlike previous research in area environmental justice, we distinguish pollution potential actual releases toxic substances locality. explore profit maximizing behavior their choice both expenditures to influence likelihood expected financial costs. proxy on prudential by observing co-localiza...

Three decades ago, President Gerald Ford signed the federal Toxic Substances Control Act (TSCA 1976) to restrict or ban the use of toxic chemicals. The world has changed remarkably since the inception of TSCA. There are new chemicals and materials today, including those created using nano technology—only a dream in 1976. Our understanding of chemi cal hazards and the techniques used to evaluate...

Within our everyday life we are confronted with a variety of toxic substances. A number of these compounds are already used as lead structures for the development of new drugs, but the amount of toxic substances is still a rich resource of new bioactive compounds. During the identification and development of new potential drugs, risk estimation of health hazards is an essential and topical subj...