Diseases, Conditions, Syndromes

Three animals that can detect disease in humans

When it comes to accurately diagnosing a disease, you might think you need expensive, high-tech machinery and equipment capable of looking deep beneath the skin at what's going on in the body. But while these high-tech implements ...

Oncology & Cancer

WHO agency says talc is 'probably' cancer-causing

The World Health Organization's cancer agency on Friday classified talc as "probably carcinogenic" for humans, however an outside expert warned against misinterpreting the announcement as a "smoking gun".

Chemical reaction

A chemical reaction is a process that always results in the interconversion of chemical substances. The substance or substances initially involved in a chemical reaction are called reactants. Chemical reactions are usually characterized by a chemical change, and they yield one or more products, which usually have properties different from the reactants. Classically, chemical reactions encompass changes that strictly involve the motion of electrons in the forming and breaking of chemical bonds, although the general concept of a chemical reaction, in particular the notion of a chemical equation, is applicable to transformations of elementary particles, as well as nuclear reactions. Different chemical reactions are used in combination in chemical synthesis in order to get a desired product. In biochemistry, series of chemical reactions catalyzed by enzymes form metabolic pathways, by which syntheses and decompositions ordinarily impossible in conditions within a cell are performed.

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