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Search Results for “Negative/positive”
 
 
1) negative. The Columbia Encyclopedia, Sixth Edition. 2001
...negative, see photographic processing....

2) electricity. The Columbia Encyclopedia, Sixth Edition. 2001
...The basic unit of charge is that on the proton or electron-the proton's charge is designated as positive while the electron's is negative. There are three basic systems...

3) ion, in chemistry. The Columbia Encyclopedia, Sixth Edition. 2001
...Positive and Negative Electric ChargesA neutral atom or group of atoms becomes an ion by gaining or losing one or more electrons or protons. Since the electron and...

4) electron. The Columbia Encyclopedia, Sixth Edition. 2001
...Ordinary electric current is the flow of electrons through a wire conductor (see electricity). The electron is one of the basic constituents of matter. An atom consists...

5) battery, electric. The Columbia Encyclopedia, Sixth Edition. 2001
...The two electrodes are connected by an external circuit (e.g., a piece of copper wire); the electrolyte functions as an ionic conductor for the transfer of the electrons...

6) Gram's stain. The Columbia Encyclopedia, Sixth Edition. 2001
...Gram s stain, laboratory staining technique that distinguishes between two groups of bacteria by the identification of differences in the structure of their cell...

7) photographic processing. The Columbia Encyclopedia, Sixth Edition. 2001
...Creation of the Latent Image on the FilmAn emulsion holding grains of photosensitive chemical compounds called silver halides is spread over a film or other material....

8) tropism. The Columbia Encyclopedia, Sixth Edition. 2001
...The term tropism is usually applied to growth and turgor movements in plants; an involuntary orientation of a microorganism toward or away from an external stimulus...

9) anion. The Columbia Encyclopedia, Sixth Edition. 2001
...The charge results because there are more electrons than protons in the anion. Anions can be formed from nonmetals by reduction (see oxidation and reduction) or from...

10) operational amplifier. The Columbia Encyclopedia, Sixth Edition. 2001
...Operational amplifiers were originally developed to be used in synthesizing mathematical operations in analog computers, hence their name. Because of recent advances...

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