Search results
Results From The WOW.Com Content Network
Toxicity is the degree to which a chemical substance or a particular mixture of substances can damage an organism. [1] Toxicity can refer to the effect on a whole organism, such as an animal, bacterium, or plant, as well as the effect on a substructure of the organism, such as a cell (cytotoxicity) or an organ such as the liver (hepatotoxicity).
The following is a list of types of poison by intended use: Biocide – a chemical substance capable of killing living organisms, usually in a selective way Fungicide – a chemical compound or biological organism used to kill or inhibit fungi or fungal spores; Microbicide – any compound or substance whose purpose is to reduce the infectivity ...
Many gases have toxic properties, which are often assessed using the LC 50 (median lethal concentration) measure. In the United States, many of these gases have been assigned an NFPA 704 health rating of 4 (may be fatal) or 3 (may cause serious or permanent injury), and/or exposure limits (TLV, TWA/PEL, STEL, or REL) determined by the ACGIH professional association.
This is the list of extremely hazardous substances defined in Section 302 of the U.S. Emergency Planning and Community Right-to-Know Act (42 U.S.C. § 11002). The list can be found as an appendix to 40 CFR 355. [1] Updates as of 2006 can be seen on the Federal Register, 71 FR 47121 (August 16, 2006). [2]
The Amanita muscaria mushroom, an iconic toxic mushroom. A toxin is a naturally occurring poison [1] produced by metabolic activities of living cells or organisms. [2] They occur especially as proteins, often conjugated. [3] The term was first used by organic chemist Ludwig Brieger (1849–1919), [4] derived from toxic.
Human antimicrobial peptides which are toxic to viruses, fungi, bacteria, and cancerous cells are considered a part of the immune system. [12] In nuclear physics, a poison is a substance that obstructs or inhibits a nuclear reaction. Environmentally hazardous substances are not necessarily poisons
Many kinds of plastic contain chemical compounds that are indestructible. They do not break down into a nontoxic material that the environment can absorb safely.
Toxic effects of substances chiefly nonmedicinal as to source (6 C, 24 P) Toxins by chemical classification (3 C) Toxins by mechanism (11 C) Pages in category "Toxins"