摘要:
A polydextrose having improved color, flavor and decreased reactivity toward food ingredients having amine functionality. The polydextrose comprises a water-soluble highly branched polydextrose having been prepared by a process which comprises melting dextrose in the presence of a food-acceptable acid catalyst. The improved polydextrose of this invention has substantially no reducing glucose groups. Another aspect of this invention is directed to a method of making the above-described improved polydextrose which comprises exposing unimproved polydextrose to an environment capable of chemically transforming the reducing glucose groups contained in the unimproved polydextrose, thereby substantially eliminating their reducing properties. An improved polymaltose prepared by heating maltose in the presence of a food-acceptable acid catalyst and chemically transforming the reducing glucose groups contained in the polymaltose, thereby eliminating their reducing properties, is also described.
摘要:
Novel, semi-crystalline depsipeptide polymers and copolymers particularly suitable for use in fabricating bioabsorbable medical implant devices such as sutures or clips and obtained through ring-opening polymerization of certain 3-substituted-2,5-morpholinediones prepared by reacting a naturally occurring alpha-amino acid with an alpha-halo acid chloride in inert solvent in the presence of an acid acceptor.
摘要:
Aqueous gel-forming compositions useful for improving oil recovery from subterranean hydrocarbon-containing reservoirs are prepared by reacting an aminoalkylated polyacrylamide with an aldehyde, dialdehyde or derivative thereof in aqueous medium. These compositions are particularly effective in reducing excessive water encroachment at producer wells.
摘要:
Novel, semi-crystalline depsipeptide polymers and copolymers particularly suitable for use in fabricating bioabsorbable medical implant devices such as sutures or clips and obtained through ring-opening polymerization of certain 3-substituted-2,5-morpholinediones prepared by reacting a naturally occurring alpha-amino acid with an alpha-halo acid chloride in inert solvent in the presence of an acid acceptor.
摘要:
Amine polymers are used to dewater suspensions of particulate matter in water. The polymers are synthesized by the reaction of a nitrile polymer such as polyacrylonitrile, an aminating agent, and a sulfur activator. The dewatering properties of these amine polymers can be beneficially employed to treat sewage sludge, silt laden water, industrial waste and the like.