In 1891, Emil Fischer made the arbitrary assignments of D- and L- to the enantiomers of glyceraldehyde.The more highly oxidized carbon is shown at the top.Vertical lines represent bonds projecting to the rear.Horizontal lines represent bonds projecting forward.Fischer projection:A two dimensional representation for showing the configuration of carbohydrates.These compounds are referred to simply as trioses, tetroses, and so forth tellling the number of carbon atoms present.Monosaccharides are classified by their number of carbon atoms:.Ketose: a monosaccharide containing a ketone group.Aldose: a monosaccharide containing an aldehyde group.They have the general formula CnH2nOn, where n varies from 3 to 8.
Monosaccharide:A carbohydrate that cannot be hydrolyzed to a simpler carbohydrate.Carbohydrate: A polyhydroxyaldehyde, a polyhydroxyketone, or a compound that gives either of these compounds after hydrolysis.
0 kommentar(er)
