摘要:
Compositions and methods for producing hydrocarbons such as aldehydes, alkanes, and alkenes are described herein. Certain hydrocarbons can be used in biofuels.
摘要:
Isolated nucleic acid molecules cloned from Artemisia annua encode artemisinic/dihydroartemisinic aldehyde dehydrogenase. Artemisinic/dihydroartemisinic aldehyde dehydrogenase enzymatically oxidizes dihydroartemisinic aldehyde to dihydroartemisinic acid and artemisinic aldehyde to artemisinic acid. The nucleic acid molecules, and the enzymes encoded thereby, may be used in processes to produce dihydroartemsinic aldehyde, dihydroartemisinic acid or artemisinic acid in a host cell. Dihydroartemisinic acid is a late precursor to the antimalarial compound artemisinin.
摘要:
The invention relates to a method for producing chiral, non-racemic, cis-configured cyclohexanols or cyclohexanol derivatives of formulae (la) and (Ib) wherein the radicals have the designations cited in the description, by means of enzymatic racemic splitting.
摘要:
Yeast comprising at least one gene encoding vanillyl alcohol oxidase, the sequence of which is the sequence SEQ ID No. l or any sequence at least 70%, preferably 80%, very preferably 90% homologous to the sequence SEQ ID No. l, and methods for producing coniferyl alcohol, ferulic acid and vanillin.
摘要:
The present invention provides a novel cytochrome P450 enzyme, as well as vectors and recombinant host cells comprising the gene encoding the enzyme. Provided are recombinant plant with enhanced disease and/or pest resistance, modified favour and/or fragrance and methods for hydroxy lifting terpene substrates.
摘要:
Crude solid vanillin-containing material is precipitated from a solution obtained by biotransformation, and purified by a process comprising contacting it with a purification fluid selected from (a) a liquefied gas whose pressure exceeds its critical pressure and whose temperature is below its critical temperature; (b) a supercritical fluid; (c) a gas. The fluid is preferably liquid carbon dioxide. The temperature is maintained below 25°. The product may be further purified by treatment with CO2 in a fluid bed drier. The crude material is preferably one precipitated from a solution resulting from biotransformation of ferulic acid. A new strain of Amycolatopsis capable of generating high concentrations of vanillin with minimal odoriferous by-products (e.g. guaiacol) is also disclosed.
摘要:
A process for producing nitrosonium ions is described, in which a nitroxyl compound such as TEMPO is oxidised using an oxidising agent in the presence of a complex of a transition metal such as Mn, Fe, Cu, and a complexing agent such as a polyamine. The process is useful for the oxidation of carbohydrates containing at least 1 cyclic monosaccharide chain group carrying a carbaldehyde group per 100 or per 25 monosaccharide units and per molecule.
摘要:
A chiral compound, particularly a chiral secondary alcohol, can be efficiently resolved under a mild condition by acylation with an alkenyl acetate in the presence of a novel aminocyclopentadienyl ruthenium complex, an enzyme catalyst, and a base.