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| The chemial process by which atmosphere nitrogen is assimalated into organic compounds, esp. by certain microorganisms as part of the nitrogen cycle |
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| The presence in the enviorment in which it is harmful or poisonous effects. |
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| A substance used for destroying insects or other orgamisms harmful to cultivated plants or to animals |
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| A substance used to destroy plants or unwanted vegetation |
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| Eliminated or discarded as no longer useful or required after the completion of a process |
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| Waste waters or conveyed in sewers |
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| EffluentLiquid waste or sewage discharged into a river or the sea |
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| A natural fuel or gas formes in the geological past from the remains of living organisms |
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| natural gas that contains hydrogen sulfide |
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| a chemical substance that neutralizes alkalis, dissolves some metals, and turns litmus red; typically, a corrosive or sour-tasting liquid of this kind |
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| a substance capable of reacting with an acid to form a salt and water, or (more broadly) of accepting or neutralizing hydrogen ions. Compare with alkali . |
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| a figure expressing the acidity or alkalinity of a solution on a logarithmic scale on which 7 is neutral, lower |
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| make (an acidic or alkaline substance) chemically |
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| Coumpounds that contain carbon in it's molicules |
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| Coumpounds which it's molicules does not contain carbon |
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| a substance required in relatively large amounts by living organisms, in particular |
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| a chemical element or substance required in trace amounts for the normal growth and development of |
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| any of a large group of organic compounds occurring in foods and living tissues and including sugars, starch, and cellulose. |
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| any of a class of organic compounds that are fatty acids |
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| any of a class of nitrogenous organic compounds that consist of large molecules composed of one or more long chains of amino acids and are an essential part of all living organisms |
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| a simple organic compound containing both a carboxyl |
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| a complex organic substance present in living cells, esp. DNA or RNA, whose molecules consist of many nucleotides linked in a long chain. |
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| the intermingling of substances by the natural movement of their particles |
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| a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one, thus equalizing the concentrations on each side of the |
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| the movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy. |
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the amount of power supplied by a source; the resistance of moving parts to be overcome by a motor.
• the amount of electricity supplied by a generating system at any given time.
• Electronics an impedance or circuit that receives or develops the output of a transistor or other device. |
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| Steady flow of charged particles |
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