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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 ...
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 ...
For example, prior to the development of the more precise methods of NMR spectroscopy and mass spectrometry, the Zeisel test was widely used to determine the number of methoxy (-OCH 3) and ethoxy (-OCH 2 CH 3) groups in carbohydrate and organophosphorus insecticides. [5]
Opt for nuts to balance out other high-carb ingredients, or better yet, instead of empty high-calorie snacks such as potato and corn chips. panco971/istockphoto Flax Seeds
Benedict's reagent is a deep-blue aqueous solution. Each litre contains: [4] 17.3 g copper sulfate; 173 g sodium citrate; 100 g anhydrous sodium carbonate or, equivalently, 270 g sodium carbonate decahydrate
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 any case, the simple vs. complex chemical distinction is too simplistic for determining the nutritional quality of carbohydrates. [28] For example, some simple-carbohydrate foods (e.g., fruit) are rich in nutrients and have only moderate effects on blood glucose, whereas some complex-carbohydrate foods (e.g., white bread) contain few ...
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 ...