摘要:
A biodegradable, swellable starch ester, containing more than 50% by weight of water-insoluble components and having a retention capacity of >500% for 0.9% (by weight) aqueous NaCl solution, and methods of its production and use.
摘要:
The invention provides a catalyst system composed of: a) a support material selected from at least one of the following materials: silicon dioxide, aluminum oxide, magnesium oxide, zirconium oxide and mixed oxides thereof, carbon nanotubes; b) an ionic liquid; c) a catalytically active composition comprising nickel; d) an activator selected from the group of Lewis acids with alkylating properties. Additionally provided is the use of the catalyst systems of the invention in the oligomerization of unsaturated hydrocarbon mixtures.
摘要:
A film, comprising: an interpolymer of ethylene; and a 3-substituted C4-10 alkene, wherein said interpolymer is prepared using a catalyst system comprising a single site catalyst.
摘要:
The present invention relates to specific Escherichia. coli mutants which can be used for the synthesis of D-amino acids, and to such a process. The mutants are distinguished by deficiencies in particular enzymes which break down D-amino acids and include those which produce D-amino acids via the carbamoylase/hydantoinase route.
摘要:
The present invention relates to a screening process for hydantoin racemases and to novel hydantoin racemases, to the nucleic acid sequences coding therefor and to a proces for mutagenesis.Hydantoin racemases are of interest in connection with the production of enantiomerically enriched amino acids from racemic hydantoins.
摘要:
The present invention describes an enzymatic process for preparing enantiomer-enriched α-hydroxycarboxylic acids and amides which comprises, in one step, the conversion of a carbonyl compound to the corresponding acid/amides via the intermediate stage of a cyanohydrin. The invention also provides a reaction system operating in such a way and a whole-cell catalyst that is advantageous for use for this reaction.
摘要:
A film containing an interpolymer of ethylene and a 3-substituted C4-10 alkene is prepared using a catalyst system comprising a Ziegler Natta or chromium oxide catalyst.
摘要:
An alkene interpolymer is prepared by polymerizing at least one 3-substituted C4-10 alkene and at least one C2-8 alkene in a gas phase polymerization using a Ziegler Natta polymerization catalyst system.
摘要:
An alkene interpolymer is prepared by polymerizing at least one 3-substituted C4-10 alkene and at least one C2-8 alkene in a gas phase polymerization using a polymerization catalyst system.