A composition contains a silylated polysaccharide, where the silylated polysaccharide is characterized by: (a) having linked fructose, galactose, anhydrogalactose, or glucose saccharide units provided that glycosidic linkages of glucose are alpha linkages and that the silylated polysaccharide is other than a silylated starch; and (b) on average 1 to 100 mole-percent of the hydroxyl groups on the polysaccharide have been silylated with a silyl group having the structure SiR.sub.3 linked to the polysaccharide through a COSi bond where each R is independently selected from hydrocarbyl radicals having from one to 12 carbon atoms, provided that on average at least one R per polysaccharide has a terminally unsaturated carbon-carbon double bond.

The invention provides a crosslinked polymer, a hydrogel, a water-based fracturing fluid comprising the same, and methods of making and using thereof. The crosslinked polymer of the invention is represented by formula (I), wherein * denotes a combining site with a polymer starting material and * denotes an optional combining site with the polymer starting material, wherein the combining sites denoted by * and * may be located in the same polymer molecule, or in different polymer molecules, but there are at least two combining sites located in different polymer molecules; X.sub.1 and X.sub.2, which may be the same or different, are independently an oxy (O) or imino (NH) group; X.sub.3 is an oxy (O) or imino (NH) group when * denotes a combining site with the polymer starting material, or X.sub.3 is a halogen, NH.sub.2 or OH when * isn't a combining site with the polymer starting material. The crosslinked polymer of the invention can be used in water-based fracturing fluid, in personal care products, household care products and pet care products, in reusable hydraulic fracturing flowback fluid, in gel explosives or in fire extinguishing mortar.

##STR00001##

A method for preparing an improved gum arabic comprising the steps of providing a gum arabic from acacia seyal selecting gum arabic having a tannin content >700 ppm (w/w).

An anti-accretion drilling fluid additive comprising at least one of a hydrophobically modified natural polysaccharide and hydrophobically modified and chemically derivatized polysaccharide; and whereby said additive acts as a bitumen encapsulant to provide a barrier against bitumen accretion during drilling in steam assisted gravity drainage (SAG) operations.

A laundry care composition including at least one laundry care ingredient and at least one leuco polymer including a polymeric carbohydrate and a leuco moiety. The polymeric carbohydrate and the leuco moiety are covalently bound. Methods of making the leuco polymer, laundry care compositions comprising the leuco polymer and methods of treating textiles with such laundry care compositions.

A chewing gum base comprises food acceptable substituted polysaccharides wherein substituents on the saccharide units in the polysaccharides produce a degree of substitution of at least I.0. The polysaccharides may have branches with an average length of 1 to 15 saccharide units per branch. The polysaccharides may be linked saccharide units such as allose, altrose, mannose, gulose, idose, galactose, 3,6 anhydro galactose, glucuronic acid, mannuronic acid, galacturonic acid, aldobiouronic acid, fucose, rhamnose, arabinose, xylose, talose, acyl substituted glucose, fructose, lactose and combinations thereof.

A Bletilla striata polysaccharide-iron complex, a preparation method therefor and use thereof are disclosed. The preparation method comprises: dissolving Bletilla striata polysaccharide and sodium citrate in distilled water, and under stirring condition, dropwise adding an NaHCO.sub.3 solution while heating to adjust a pH value of a reaction system; when a temperature of the reaction system rises to a reaction temperature, alternately dropwise adding the NaHCO.sub.3 solution and an FeCl.sub.3 solution to allow reaction until a red insoluble matter appears in the reaction system; and continuing the reaction to obtain a reaction solution; and subjecting the reaction solution to cooling, centrifugation, concentration, alcoholic precipitation, suction filtration, drying, redissolution, dialysis, and freezing to obtain the Bletilla striata polysaccharide-iron complex. The Bletilla striata polysaccharide-iron complex prepared in the present disclosure has a higher iron content and a significantly enhanced antioxidant ability.

Corn fiber gum (CFG) production via a path without a starch removal step, using sodium hydroxide during the extraction, eliminating the use of hydrogen peroxide throughout the process, and recovering CFG by spray drying is provided. Calcium hydroxide may also be used during the alkaline extraction to improve the color of the extracted CFG.

The present invention provides a neutralized glucomannan scaffold capable of promoting cell growth and suitable for three-dimensional tissue culture and engineering. The present invention also provides methods for making and degrading the neutralized glucomannan scaffold. The present invention further provides a method of growing cells on a neutralized glucomannan scaffold.

Method for inhibiting the swelling and the dispersion of shales in the treatment of subterranean shale formations comprising the use of a cationic tamarind gum and fluids for the treatment of subterranean shale formations comprising a cationic tamarind gum.