In terms of structure, the difference between D-glucose and L-glucose refers to the position of the OH-anion on the last asymmetric carbon of the glucose molecule. In D-glucose, the OH (hydroxyl group) is situated to the right of the carbon atom while in L-glucose, the OH is situated to the left.Continue Reading
The designations D and L extend to families of sugars. They stem from two different forms of an asymmetric carbon found in glyceraldehyde, a three-carbon form of sugar from which glucose and many other sugars are derived. In D-glyceraldehyde, the hydroxyl group of atoms is situated to the right, while in L-glucose, the hydroxyl group is oriented to the left. All the sugars derived from D-glyceraldehyde are D-sugars, including D-glucose and likewise L-glucose is derived from L-glyceraldehyde.
The significance of this difference lies in their shape. Unlike the two-dimensional Fischer projections which simply look like flat mirror images, in reality the substances actually have a different shape, one of the means that enzymes use to recognize substrates. Consequently, enzymes - and by extension biological systems - will only recognize and react to the D-form of sugars in virtually every instance. That is why L-glucose seldom enters into the discussion of biology.Learn more about Science
The Lewis dot structure for CH3CN, the formula for acetonitrile, is drawn with a C (carbon) in the center with four radiating lines, three of which connect to H (hydrogen) and one of which connects to another C. The second C is connected by three straight lines to an N (nitrogen), which has two dots around it.Full Answer >
Graphite is one of the two polymers of carbon that are naturally formed and has a two-dimensional planar crystal structure. As a very good conductor of heat and electricity and with great natural strength and stability at high temperatures, graphite has many industrial uses.Full Answer >
Carbon is small and has four valence electrons; these factors combine into a unique structure that allows it to easily make a chain of carbon atoms. It creates covalent bonds — the strongest bonds between atoms.Full Answer >
The main difference between hard and soft corals is that hard corals produce carbon calcium that creates a skeletal structure and soft corals do not create carbon calcium, so the skeletal structure doesn't exist. Soft coral looks like oceanic vegetation, but it is coral and does live within hard coral reefs.Full Answer >