That IS the "full form".
They stand for "dextrorotatory" and "levorotatory" respectively, but it should be noted that these terms (which have to do with whether the compound rotates polarized light to the right or the left) do not actually apply to the compounds themselves... rather, it refers to the enantiomer of glyceraldehyde that they are related to.
Saying "dextrorotatory" instead of D would imply that the compound itself is (+) ... that is, it rotates light to the right ... which may or may not be the case. D-glyceraldehyde itself actually IS (+), but it turns out that that was a lucky guess... the nomenclature had been established before anyone really knew for certain that they'd assigned the names to the proper structure.
To give a simple example: the L-amino acids commonly found in proteins are divided just about equally in terms of which direction they rotate light: 9 are (+) and 10 are (-). Calling them "levorotatory" would imply they're all (-), which is definitely not the case.
The stereochemistry. Specifically, for carbohydrates, the configuration at the last (highest numbered) stereocenter determines whether it's D or L form. D means it has the same configuration as (+)-glyceraldehyde; L means it has the same configuration as (-)-glyceraldehyde. Note that D and L (capital letters) are not at all the same as d and l (lower letters). The capital letters relate the configuration to glyceraldehyde, the lower case letters specify whether the substance is dextrorotatory or levorotatory. For glyceraldehyde, D is d (+) and L is l (-), but this is not always the case for other molecules.
To determine if a sugar is in the D or L configuration, one can use the Fischer projection. In a Fischer projection, if the hydroxyl group on the highest numbered chiral carbon is on the right side, the sugar is in the D configuration. If the hydroxyl group is on the left side, the sugar is in the L configuration.
In organic chemistry, the d and l configurations refer to the arrangement of atoms around a chiral carbon atom. The d and l configurations are based on the orientation of the hydroxyl group on the chiral carbon atom. In the d configuration, the hydroxyl group is on the right side, while in the l configuration, it is on the left side. These configurations are important for determining the optical activity of a molecule.
The difference between the L and D configuration in organic molecules is related to the arrangement of atoms around a chiral carbon atom. In the L configuration, the highest priority functional group is on the left side of the chiral carbon, while in the D configuration, it is on the right side. This distinction is important in understanding the stereochemistry and properties of organic compounds.
The chiral carbon farthest from the carbonyl group (C-5 in aldopentoses) determines the D or L configuration. If the hydroxyl group on this carbon is on the right side in a Fischer projection, it is a D sugar; if it is on the left side, it is an L sugar.
The stereochemistry. Specifically, for carbohydrates, the configuration at the last (highest numbered) stereocenter determines whether it's D or L form. D means it has the same configuration as (+)-glyceraldehyde; L means it has the same configuration as (-)-glyceraldehyde. Note that D and L (capital letters) are not at all the same as d and l (lower letters). The capital letters relate the configuration to glyceraldehyde, the lower case letters specify whether the substance is dextrorotatory or levorotatory. For glyceraldehyde, D is d (+) and L is l (-), but this is not always the case for other molecules.
intra unterine device
liquid crystal display
Light Emitting Diode
The full form of dsl is D-Digital S-Subscriber L-Lan thus the full form of dsl is digital subscriber lan
To determine if a sugar is in the D or L configuration, one can use the Fischer projection. In a Fischer projection, if the hydroxyl group on the highest numbered chiral carbon is on the right side, the sugar is in the D configuration. If the hydroxyl group is on the left side, the sugar is in the L configuration.
D and L forms of monosaccharides refer to the configuration of the highest-numbered chiral carbon in a sugar molecule. In the D form, the hydroxyl group on the highest-numbered chiral carbon is on the right side, while in the L form, it is on the left side. The designation of D or L does not indicate the direction of optical rotation.
The behavior against polarized light is different.
In organic chemistry, the d and l configurations refer to the arrangement of atoms around a chiral carbon atom. The d and l configurations are based on the orientation of the hydroxyl group on the chiral carbon atom. In the d configuration, the hydroxyl group is on the right side, while in the l configuration, it is on the left side. These configurations are important for determining the optical activity of a molecule.
The difference between the L and D configuration in organic molecules is related to the arrangement of atoms around a chiral carbon atom. In the L configuration, the highest priority functional group is on the left side of the chiral carbon, while in the D configuration, it is on the right side. This distinction is important in understanding the stereochemistry and properties of organic compounds.
Answer 8 D-isomers of fructose, as I figured out. Of the D-keto-hexoses (like fructose) there are : 8x D-2-ketoses: alpha and beta form of 4 members [D-psicose, D-fructose, D-sorbose, D-tagatose] Not: D-3-ketoses can NOT form furanose ring (4C + O) Not: D-4-ketoses = same as D-3-ketose Not: D-5-ketoses = D-2-ketose At last you can also mention the same set of the (full) enantiomers in L-form: 8x L-2-ketoses: alpha and beta form of [L-psicose, L-fructose, L-sorbose, L-tagatose]
The chiral carbon farthest from the carbonyl group (C-5 in aldopentoses) determines the D or L configuration. If the hydroxyl group on this carbon is on the right side in a Fischer projection, it is a D sugar; if it is on the left side, it is an L sugar.