Abstract:
This document describes biochemical pathways for producing 7-aminoheptanoic acid using a β-ketoacyl synthase or a β-keioihiolase to form an N-acetyl-5-amino-3- oxopentanoyl-CoA intermediate. 7-aminoheptanoic acid can be enzymatieally converted to pimelic acid, 7-hydroxyheptanoic acid, heptamethylenediamine or 1,7-heptanediol or corresponding salts thereof. This document also describes recombinant microorganisms producing 7-aminoheptanoic acid as well as pimelic acid, 7-hydroxyheptanoic acid, heptamethylenediamine and 1,7-heptanediol or corresponding salts thereof.
Abstract:
This document describes polypeptides with dual CoA transferase and β-ketothioiase activities and variants thereof, use of such polypeptides in biosynthetic methods, and non-naturally occurring hosts comprising such polypeptides.
Abstract:
A polyester comprising 0.1 to 7 weight percent, based on the total weight of the polyester, of at least one monomeric component of formula (I): wherein R1 is independently chosen from H, methyl, and ethyl, R 2 and R 3 are independently chosen from -COOH, -COOMe, -COOEt, -COO I Pr, -COO n Pr, - CH 2 OH, -CI, -Br, and NH 2 , and J and K are independently chosen from 1, 2, 3, 4, 5, 6, 7, or 8; at least one dicarboxylic acid component other than the monomeric component of formula (I); and at least one diol component.
Abstract:
This document describes materials and methods for, for example, producing 6-hydroxyhexanoic acid using a β-ketothiolase or synthase and an alcohol O-acetyltransferase to form a 6-acetyloxy-3-oxohexanoyl-CoA intermediate. This document describes biochemical pathways for producing 6-hydroxyhexanoic acid using a β-ketothiolase or synthase and an alcohol O-acetyltransferase to form a 6-acetyloxy-3-oxohexanoyl-CoA intermediate. 6-hydroxyhexanoic acid can be enzymatically converted to adipic acid, caprolactam, 6-aminohexanoic acid, hexamethylenediamine or 1,6-hexanediol. This document also describes recombinant hosts producing 6-hydroxyhexanoic acid as well as adipic acid, caprolactam, 6-aminohexanoic acid, hexamethylenediamine and 1,6-hexanediol.
Abstract:
The present disclosure provides novel polypeptides with improved 3-buten-2- ol dehydratase activity, polypeptides with improved linalool dehydratase activity, and polypeptides with catalytic activity in the conversion of 3-methyl-3-buten-2-ol to isoprene. Methods of making and using the polypeptides are also provided.
Abstract:
Processes for forming synthetic fibers from polymer melts containing a first fiber forming polymer, a spin assist additive, and optionally a pigment additive are provided. Also provided are synthetic fibers of a first fiber forming polymer, a spin assist additive, and optionally a pigment additive, as well as articles of manufacture such as yarns, carpets and fabrics made up of these synthetic fibers.
Abstract:
Disclosed is method and apparatus for at least partially hydrogenating an organonitrile by reducing an iron oxide catalyst precursor contained in a movable cartridge comprising a casing, an inlet standpipe and at least one exit aperture, in a first, activation vessel through contact with a hydrogen-containing gas stream to produce an activated heterogeneous iron catalyst, moving and loading the movable cartridge containing the activated heterogeneous iron catalyst into a second, reaction vessel for carrying out an organonitrile hydrogenation reaction, flowing a feed stream comprising a charge of an organonitrile, hydrogen, and ammonia into the inlet standpipe of the movable cartridge such that it contacts the activated heterogeneous iron catalyst to produce a reaction mixture, and withdrawing the reaction product mixture, comprising an organic amine, hydrogen, and ammonia, from the second vessel via the exit aperture.
Abstract:
The present disclosure provides methods and apparatuses providing uniform polyamide pellets. In one example, a method of producing uniform pellets of a polyamide polymer can comprise steps of cutting a strand of an extruded polyamide polymer at a cutting speed substantially proportional to a throughput of the polyamide polymer to achieve polymer pellet uniformity, and adjusting one or more process parameters to maintain a uniformity of the polyamide pellets.
Abstract:
Apparatuses and methods for preparing polyamide polymer with reduced foaming comprise steps of introducing a polymerizable composition including a polyamide salt into an agitated autoclave for polymerization, and increasing pressure within the agitated autoclave during a first cycle until a relative high pressure is achieved while agitating the polymerizable composition with an agitator. Additional steps include maintaining the pressure at the relative high pressure during a second cycle at least in part by venting the agitated autoclave, and stopping or significantly slowing movement of the agitator during at least a portion of the second cycle until a foam level within the agitated autoclave is reduced.
Abstract:
A side stream compounding unit is coupled to a continuous polyamide manufacturing system and is configured to divert polyamide from the manufacturing system, mixes additive with polyamide, and then return the polyamide-additive mixture to a main stream of polyamide in the manufacturing system.