enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Molisch's test - Wikipedia

    en.wikipedia.org/wiki/Molisch's_test

    Molisch test (using α-napthol) indicating a positive result (see purple ring). Molisch's test is a sensitive chemical test, named after Austrian botanist Hans Molisch, for the presence of carbohydrates, based on the dehydration of the carbohydrate by sulfuric acid or hydrochloric acid to produce an aldehyde, which condenses with two molecules of a phenol (usually α-naphthol, though other ...

  3. Seliwanoff's test - Wikipedia

    en.wikipedia.org/wiki/Seliwanoff's_test

    An example of a positive Seliwanoff’s test. Seliwanoff’s test is a chemical test which distinguishes between aldose and ketose sugars. If the sugar contains a ketone group, it is a ketose. If a sugar contains an aldehyde group, it is an aldose. This test relies on the principle that, when heated, ketoses are more rapidly dehydrated than ...

  4. Osazone - Wikipedia

    en.wikipedia.org/wiki/Osazone

    Osazone formation was developed by Emil Fischer, [3] who used the reaction as a test to identify monosaccharides. The formation of a pair of hydrazone functionalities involves both oxidation and condensation reactions. [4] Since the reaction requires a free carbonyl group, only "reducing sugars" participate.

  5. Benedict's reagent - Wikipedia

    en.wikipedia.org/wiki/Benedict's_reagent

    Generally, Benedict's test detects the presence of aldehyde groups, alpha-hydroxy-ketones, and hemiacetals, including those that occur in certain ketoses. In example, although the ketose fructose is not strictly a reducing sugar, it is an alpha-hydroxy-ketone which results to a positive test because the base component of Benedict converts it ...

  6. Oxidative/fermentation glucose test - Wikipedia

    en.wikipedia.org/.../fermentation_glucose_test

    It was developed in 1953 by Hugh and Leifson to be utilized in microbiology to determine the way a microorganism metabolizes a carbohydrate such as glucose (dextrose). [1] OF-glucose deeps contain glucose as a carbohydrate, peptones, bromothymol blue indicator for Hugh-Leifson's OF medium or phenol red for King's OF medium, and 0.5% agar.

  7. Inborn errors of carbohydrate metabolism - Wikipedia

    en.wikipedia.org/wiki/Inborn_errors_of...

    Exercise test: Late about 3 times increase of lactate (higher than in GSD 5 and lower than in healthy). Increased rise of ammonia. [5] No specific treatment. General advice is avoidance of vigorous exercise and of high-carbohydrate meals. PFKL: 171860: Liver, also RBCs Step 4 Aldolase A: ALDOA: 103850: Muscle, also liver and RBCs Aldolase A ...

  8. Aniline acetate test - Wikipedia

    en.wikipedia.org/wiki/Aniline_acetate_test

    The aniline acetate test is a chemical test for the presence of certain carbohydrates, in which they are converted to furfural with hydrochloric acid, which reacts with aniline acetate to produce a bright pink color. Pentoses give a strong reaction, and hexoses give a much weaker reaction.

  9. Food pyramid (nutrition) - Wikipedia

    en.wikipedia.org/wiki/Food_pyramid_(nutrition)

    To understand why, consider the determination of an amount of "10% free sugar" to include in a day's worth of calories. For the same amount of calories, free sugars take up less volume and weight, being refined and extracted from the competing carbohydrates in their natural form. In a similar manner, all the items are in competition for various ...