In a combustion reaction, fuel is burned and reacts with oxygen to release energy. Respiration is the chemical change that takes place inside living cells. Glucose and oxygen are used to release ...

A catalyst is a substance that speeds up a chemical reaction. The catalyst is not used up or chemically changed during the reaction. Enzymes are catalysts that work inside the cells of living ...

Anaphylaxis is a potentially life threatening allergic reaction that can start fast and affect your whole body. Seek medical help as soon as symptoms begin. Early signs can include a “feeling of ...

In the United States, about 33 million people and 1 in 13 children have food allergies, and nine foods cause 90% of reactions. These include milk, eggs, peanuts, tree nuts, wheat, soy, fish, shellfish ...

Biosynthesis is the generation of natural products through enzymatic reactions, as in cellular metabolism. Successive enzymatic reactions by a number of enzymes are generally required to achieve a ...

Photochemistry is the study of chemical processes that occur because of the absorption of light. The study of photochemical systems that use sunlight to drive important chemical reactions or to ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...