Science

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…

Estimate the sum of decimals To estimate means to find an answer that is close to but not exact. It is a reasonable answer to…

Kyanite Definition Kyanite is a bluish-green to colorless triclinic mineral. Its chemical formula: Al2SiO5. It occurs as long, thin, blade-shaped crystals in metamorphic rocks. It…

Carbonic Acid Definition Carbonic acid is a weak, unstable acid present in solutions of carbon dioxide in water. It gives carbonated beverages their sharp taste.…

Carbonic Anhydrase Definition Carbonic anhydrase is an enzyme that assists rapid inter-conversion of carbon dioxide and water into carbonic acid, protons and bicarbonate ions. The…

Andalusite Definition Andalusite is a hard, grayish white to pinkish brown orthorhombic mineral. It occurs as nearly square prisms, often with cross-shaped cross sections, in…

Review about HP’s Spectre x2 Introduction With HP’s signature elegant, thoughtful design, the 2017 Spectre x2 two-in-one has a lot to recommend it in comparison…

Improving an Estimate of a sum by rounding Estimation usually requires rounding. When you round a number, you find a new number that’s close to…

Xanthine Oxidase Definition Xanthine oxidase is a form of xanthine oxidoreductase, an enzyme that generates reactive oxygen species such as superoxide radicals and hydrogen peroxide…

Thorite Definition Thorite is a yellow, brownish, or black radioactive mineral consisting of tetragonal thorium silicate. It occurs in coarse granite and is a source…