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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…

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…

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…

Staurolite Definition Staurolite is a brownish to black orthorhombic mineral, often having crossed intergrown crystals and found in mica schists and gneisses. Its chemical formula:…

Lymphocyte Definition Lymphocyte is any of various white blood cells, including B cells and T cells, that function in the body’s immune system by recognizing…

Uric Acid Definition Uric acid is a product produced by the body after the purines in many foods undergo the digestive process and are broken…

Review about the DJ2GO2 Introduction Numark (numark.com), the world’s leading innovator of DJ solutions, announced (16/8/2017) the introduction and immediate availability of its new DJ2DO2…

Topaz Definition Topaz is a colorless, blue, yellow, brown, or pink orthorhombic mineral valued as a gem. Topaz occurs as transparent or translucent prisms in…

Place Values – Expanded Form Bundling objects into sets of 10 (then 10 tens into one hundred, and 10 hundreds into one thousand, etc.) is…

Calcium Bicarbonate Definition Calcium bicarbonate consists of calcium, hydrogen, oxygen and carbon. It is not a naturally occurring solid, but it does form in water…

Sillimanite Definition Sillimanite is a usually white, pale-green or brown orthorhombic mineral occurring as long, slender, fibrous crystals in metamorphic rocks. It is a polymorph…

Plasma Cell Definition Plasma cell is a lymphocyte that originates from a B cell and produces antibodies as part of a humoral immune response. They…