Health

Volunteer firefighters have higher levels of 'forever chemicals'

Volunteer firefighters—who comprise more than 65 percent of the U.S. fire service—have higher levels of "forever chemicals," per- and polyfluoroalkyl substances (PFAS), in their bodies than the general public, according ...

Surgery

Skin and bones repaired by bioprinting during surgery

Fixing traumatic injuries to the skin and bones of the face and skull is difficult because of the many layers of different types of tissues involved, but now, researchers have repaired such defects in a rat model using bioprinting ...

Psychology & Psychiatry

Why your social media habit is probably not an addiction

Social media apps are useful sources of information. They help us catch up with the activities of friends, news, current affairs, government COVID updates and the latest happenings in celebrity and sport.

page 1 from 40

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.

This text uses material from Wikipedia, licensed under CC BY-SA