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Fischer projection of D-glyceraldehyde. Like most carbohydrates, simple aldoses have the general chemical formula C n (H 2 O) n.Because formaldehyde (n=1) and glycolaldehyde (n=2) are not generally considered to be carbohydrates, [1] the simplest possible aldose is the triose glyceraldehyde, which only contains three carbon atoms.
Reducing form of glucose (the aldehyde group is on the far right). A reducing sugar is any sugar that is capable of acting as a reducing agent. [1] In an alkaline solution, a reducing sugar forms some aldehyde or ketone, which allows it to act as a reducing agent, for example in Benedict's reagent.
List of common dips; Paste – Food paste is a semi-liquid colloidal suspension, emulsion, or aggregation used in food preparation or eaten directly as a spread. [23] Pastes are often highly spicy or aromatic. List of food pastes; Spread – Foods that are literally spread, generally with a knife, onto bread, crackers, or other food products ...
The island of Ireland's Food Safety Promotion Board uses The Food Pyramid, which is divided into five levels: bread, cereals and potatoes at the large base (6 or more servings); then fruit and vegetables (5); followed by milk, cheese and yogurt (3); then meat, fish, eggs and alternatives (2); and finally fats, high fat/sugar snacks, foods and ...
Aldonic acids are the products of the oxidation of aldoses by Benedict's or Fehling's reagents. [7] Copper ions react with an aldose to form a red precipitate, Cu 2 O. The reaction scheme of an aldose being oxidized by the copper ions in a Benedict's reagent solution. The R group provided is an example of a sugar backbone.
There are few examples of seven-carbon sugars in nature, among which are: sedoheptulose or D-altro-heptulose (a ketose), an intermediate in the Calvin cycle and in lipid A biosynthesis [1] [2] mannoheptulose (a ketose), found in avocadoes [3] L-glycero-D-manno-heptose (an aldose), a late intermediate in lipid A biosynthesis. [4]
These prefixes are attached to the systematic name of the molecular graph. So for example, D-glucose is D-gluco-hexose, D-ribose is D-ribo-pentose, and D-psicose is D-ribo-hexulose. Note that, in this nomenclature, mirror-image isomers differ only in the ' D '/' L ' prefix, even though all their hydroxyls are reversed.
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