Examples of 'a-hydroxy' in a sentence
Meaning of "a-hydroxy"
A-hydroxy refers to a chemical structure that includes a hydroxyl group (-OH) attached to the alpha carbon in a molecule. It is often discussed in the field of organic chemistry
How to use "a-hydroxy" in a sentence
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a-hydroxy
Examples of suitable hydroxy acids are a-hydroxy acids.
The a-hydroxy ketones can have various structures.
Lactic acid is an exemplary a-hydroxy acid.
The use of a-hydroxy ketones alone is not described.
The present invention is a process for preparing a-hydroxy acids.
The a-hydroxy acid is lactic acid or a salt thereof.
Process for preparing esters of a-hydroxy methionine from sugars.
Preferred a-hydroxy acids are lactic acid and glycolic acid.
In one embodiment, the water soluble carboxylic acid is an a-hydroxy carboxylic acid.
In the case of an a-hydroxy acid solution the solvent is preferably water.
A polyester or polyether polymeric triol condensed with an a-hydroxy acid, may be used.
The a-hydroxy carboxylic acid is used to generate the rutile phase.
The organic acid is preferably an a-hydroxy acid and in particular lactic acid.
Some conditions may require treatment with large amounts of a-hydroxy acid salts.
The stability of the a-hydroxy nitrile determines the allowable temperature.
See also
The lactide or cyclic diester is formed from its corresponding a-hydroxy acid by esterification.
Preferred acids are the a-hydroxy acids, especially lactic acid and azelaic acid.
The mother liquors which are obtained still contain considerable quantities of a-hydroxy acid.
By adding an a-hydroxy carboxylic acid and an amino acid both effects may be achieved.
For the treatment of dermatological disorders with a-hydroxy acids, the desidiratum is not systemic distribution.
The methionine a-hydroxy analogue and derivatives thereof may alternatively be represented as follows,.
The hydroxy carboxylic acids used in accordance with the invention are preferably a-hydroxy carboxylic acid.
Natural organic acids including a-hydroxy acids may act as exfoliants, for example.
Poly a-hydroxy acids are approved by the FDA for human clinical use.
A process for the preparation of a methionine a-hydroxy analogue and derivatives thereof of the formula,.
Also, a-hydroxy acid such as lactic acid irritates skin.
A composition as claimed in Claim 1 wherein the a-hydroxy acid is lactic acid or glycolic acid.
Inter alia, a-hydroxy ketones are also additionally described.
The adduct is treated with an aldolase to form a-hydroxy carboxylate 2.
Within this pH range, the a-hydroxy acid forms an amphoteric salt with the selected base.
An a-bromo acyl bromide is utilized as the a-hydroxy acid equivalent.
Generally, an a-hydroxy carboxylic acid is heated under reflux with a polyol.
A number of methods are available to prepare a-hydroxy carbonyls and a-diketones.
Examples of a-hydroxy acids include glycolic acid, lactic acid, and citric acid.
Even more preferentially, the acid is chosen from a-hydroxy acids.
MHA means methionine a-hydroxy analogue and derivatives thereof.
A process as claimed in claim 2 or claim 3 wherein said a-hydroxy acid is lactic acid.
Additionally, a-hydroxy and a-thio carboxylic acids may also be employed in the above-described reactions.
Copolymers of glycolic, lactic, and other a-hydroxy acids are highly desirable.
In particular suitable are admixtures with mono - or bis-acylphosphine oxides and / or a-hydroxy ketones.
The preparation of some representative a-hydroxy acid containing diols is described in Preparation 2 below.
The DHTO is reacted with a dihydric alcohol, an alkanolamine, or an a-hydroxy ketone.
In one embodiment, the a-hydroxy acid is lactic or glycolic.
Antimicrobial activity results plotted as a function of total molar concentration of a-hydroxy acid . Figure 2.
Other common a-hydroxy monocarboxylic acids include glycolic, hydroxymethyl glycolic, hydroxybutanoic, hydroxypentanoic, glucuronic and gluconic acids.
The linear polyesters may be prepared from a-hydroxy carboxylic acids, e . g.
Polymerizing using the a-hydroxy acid obtained a defined polyhydroxyalkanoate ( PHA ).
The emulsion according to the claim 7, wherein said a-hydroxy acid is lactic acid.
The a-hydroxy acids that are used for the present invention include Hmp, Hmb.
The process according to claim 1, wherein the methionine a-hydroxy analogue and derivatives thereof are recovered.
