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Clinohumite

Clinohumite Definition Clinohumite is a monoclinic-prismatic mineral containing fluorine, hydrogen, iron, magnesium, oxygen, and silicon. It is an uncommon member of the humite group, a magnesium silicate according to the chemical formula (Mg,Fe)9(SiO4)4(F,OH)2. The formula can be thought of as f.....

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Hydrolysis

Hydrolysis Definition Hydrolysis is the breaking down of a chemical compound into two or more simpler compounds by reacting with water. The proteins, fats, and complex carbohydrates in food are broken down in the body by hydrolysis that is catalyzed by enzymes in the digestive tract. The term com.....

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Addition Equations

Addition Equations To solve an equation means to find a value for the variable that makes the equation true. Whatever you do to one side of the equation, you must also do to the other side. Solving an equation is like solving a puzzle! It means finding a value for the variable that makes the [&he.....

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Jerrygibbsite

Jerrygibbsite Definition Jerrygibbsite is a rare silicate mineral with chemical formula: (Mn,Zn)9(SiO4)4(OH)2. It is member of the leucophoenite family of the humite group. It is always found with these two minerals. It is a dimorph of sonolite.Light to medium pinkish violet massive mineral with .....

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Cofactor

Cofactor Definition Cofactor in biochemistry is a substance, such as a metallic ion or a coenzyme that must be associated with an enzyme for the enzyme to function. Cofactors work by changing the shape of an enzyme or by actually participating in the enzymatic reaction. Cofactor catabolism is sti.....

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Aldehyde Oxidase

Aldehyde Oxidase Definition Aldehyde oxidase (AO) is a molybdenum-containing oxidoreductase that is similar to xanthine oxidase, also a molybdoenzyme. It catalyzes the oxidation of aldehydes into carboxylic acid, and in addition, catalyzes the hydrozylation of some heterocycles. It can also catal.....

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T-Cell Receptor

T-Cell Receptor Definition T-cell receptor (TCR) is one of two polypeptide chains (a or ß) on the surface of T lymphocytes that recognize and bind foreign antigens. TCRs are antigen specific; their activity depends on antigen processing by macrophages or other antigen-presenting cells and the pr.....

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Chondrodite

Chondrodite Definition Chondrodite is one of the rarest and most beautiful of gemstones and it is occasionally faceted for collectors. It is a nesosilicate mineral with formula (Mg,Fe)5(SiO4)2(F,OH,O)2. It is the most prevalent and well-known member of the humite group. It is named for the Greek .....

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Cytotoxic T cell

Cytotoxic T Cell Definition Cytotoxic T cell is a type of immune cell that can kill certain cells, including foreign cells, cancer cells, and cells infected with a virus. It can be separated from other blood cells, grown in the laboratory, and then given to a patient to kill cancer cells. A cytot.....

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Four Basic Operations of Mathematics

Four Basic Operations of Mathematics: Addition, Subtraction, Multiplication and Division The practice section of this page contains addition, subtraction, multiplication and division problems. Refer to the appropriate lesson if you find that you need extra practice or explanation for any of thes.....

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About Passions

About Passions Definition In philosophy, Passions is a central concept, which refers to the conception of subjectivity. For philosophers of freedom, passion is a “disease of the soul” (Kant), for the rationalist philosophers (Plato, Descartes), they blur the trial and prevent access to truths.....

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Natural Killer Cell

Natural Killer Cell Definition Natural killer cell is a cell that can react against and destroy another cell without prior sensitization to it. It is a small killer cell that destroys virus-infected cells or tumor cells without activation by an immune system cell or antibody. It is also known as .....

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