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phosphor A chemical substance that exhibits fluorescence when excited by ultraviolet radiation, x-rays or an electron beam. The amount of visible light is proportional to the amount of excitation energy. If the fluorescence decays slowly after the exciting source is removed, the substance is said to be phosphorescent.
Ãâó: www.marktechopto.com/engineering/glossary.cfm
phosphorus A mineral present in the body as phosphate, like calcium it is needed for the formation of bone tissue and plays other vital roles in the blood, nervous and enzyme systems.
Ãâó: www.pauls.com.au/information/information.cfm
phosphorous One of the essential elements of plant nutrition, identified by the chemical symbol P. It encourages root development and also ripening of fruit and seeds.
Ãâó: www.brusselsbonsai.com/Definitions.html
phosphorus An element essential to the growth and development of plants, but which, in excess, can cause unhealthy conditions that threaten aquatic animals in surface waters.
Ãâó: www.soil.ncsu.edu/publications/BMPs/glossary.html
phospholipid A fat in which one fatty acid is replaced by phosphorus and a nitrogenous compound.
Ãâó: www.cytosport.com/science/glossary.html
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