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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 ...
As foods vary by brands and stores, the figures should only be considered estimates, with more exact figures often included on product labels. For precise details about vitamins and mineral contents, the USDA source can be used. [1] To use the tables, click on "show" or "hide" at the far right for each food category.
In a qualitative test a sample is first reacted with a mixture of acetic acid and hydrogen iodide in a test tube. The ensuing reaction results in the cleavage of the ether or the ester into an alkyl iodide and respectively an alcohol or a carboxylic acid .
However, as the food supply has evolved, and with the increasing demand for nutritional and related components, it has become more difficult for compilers to rely only on chemical analysis when compiling FCDBs. For example, in the UK the third edition of The Composition of Foods [3] presented data on vitamin content of foods. However, due to ...
This template presents a comparison table for major staple foods. It is intended to be transcluded into other pages. If it is transcluded into an article for one of the staple foods listed in the table e.g., the Wheat article, then the column for that food will be automatically highlighted.
Other carbohydrates which produce a negative result include inositol. Benedict's reagent can also be used to test for the presence of glucose in urine, elevated levels of which is known as glucosuria. Glucosuria can be indicative of diabetes mellitus, but
Plant-based foods — especially beans, peas and lentils — are higher in beneficial nutrients, like fiber, which promotes digestive regularity and clears "bad" LDL cholesterol from the body, as ...
Phosphate tests test for phosphate; The sodium fusion test tests for the presence of nitrogen, sulfur, and halides in a sample; The Zerewitinoff determination tests for any acidic hydrogen; The Oddy test tests for acid, aldehydes, and sulfides; Gunzberg's test tests for the presence of hydrochloric acid; Kelling's test tests for the presence of ...