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medical test tube glass

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biologists examine measure and test a polar bear

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biological technician prepares a sample of fish food to test in the nitrogen analyzer which reads the percent nitrogen

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gel electrophoresis chemical test laboratory

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chemical test laboratory electrophoresis

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medical test tube

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apollo soyuz test project

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bacillus anthracis positive encapsulation test rough colonies on blood agar and smooth colonies on bicarbonate agar

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bacillus anthracis positive encapsulation test is demonstrated using two different agar media

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rbc test on a slide used in the diagnosis of cholera

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