| Vitali's t. |
1. (for alkaloids) evaporate with fuming nitric acid and add a drop of potassium hydroxide; color reactions will occur. For atropine the color is violet, turning to red. 2. (for alkaloids) add sulfuric acid, potassium chlorate, and an alkaline sulfide; various color reactions will follow. 3. (for bile pigments) add a few drops of potassium nitrate in solution and dilute sulfuric acid. The color reactions are green, followed by blue or red and yellow. 4. (for bile pigments) add quinine bisulfate in solution and follow with diluted ammonia solution, sulfuric acid, a crystal of sugar, and alcohol; a violet color results. 5. (for thymol) distill, and pass the vapor through a mixture of chloroform and potassium hydroxide solution; a red color results. 6. (for pus in the urine) the urine is acidified with acetic acid and filtered. On the filter paper thus obtained a small quantity of guaiacum is dropped. The paper will turn a dark blue if pus is present.
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| Vitali's test |
see under test.
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| vitalism |
the theory, opposed to mechanism (def. 3), that biological activities are due to a vital force or principle distinct from physical and chemical forces.
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| Vitallium |
trademark for a cobalt-chromium alloy used in dentures and in surgical appliances, prostheses, and instruments.
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| vitality |
Capacity for ecosystems to maintain energy flow and endurance.
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