Abstract: The present invention relates to a new class of chemical admixtures for hydraulic cement compositions and methods of preparing same. The admixtures, which include complexes of metals with one or more hydroxycarboxylic acids and/or derivatives of hydroxycarboxylic acids, improve at least the following properties of cement compositions: hardness, compressive strength, shrinkage, and freeze-thaw resistance. Hydraulic cement compositions that may be improved with the chemical admixtures include pastes, mortars, grouts and concretes, all of which may be made from ordinary Portland cement, blended cements, or non-Portland cements made with Supplementary Cementitious Materials.

Abstract: The present invention relates to a new class of chemical admixtures for hydraulic cement compositions and methods of preparing same. The admixtures, which include complexes of metals with one or more hydroxycarboxylic acids and/or derivatives of hydroxycarboxylic acids, improve at least the following properties of cement compositions: hardness, compressive strength, shrinkage, and freeze-thaw resistance. Hydraulic cement compositions that may be improved with the chemical admixtures include pastes, mortars, grouts and concretes, all of which may be made from ordinary Portland cement, blended cements, or non-Portland cements made with Supplementary Cementitious Materials.

Abstract: This invention relates to a new class of chemical admixtures for hydraulic cement compositions such as pastes, mortars, grouts and concretes. The cement compositions are comprised of ordinary Portland cement, blended cements, or non-Portland cements made with Supplementary Cementitious Materials. The admixtures contain complexes of metals with derivatives of hydroxycarboxylic acids, and improve properties of cement compositions, including setting, hardness, compressive strength, shrinkage, and freeze-thaw resistance. The invention discloses a method for improving the properties of hydraulic cements by adding the disclosed chemical admixtures to cement compositions, and also discloses methods of preparing said admixtures.

Abstract: This invention relates to a new class of chemical admixtures for hydraulic cement compositions such as pastes, mortars, grouts and concretes. The cement compositions are comprised of ordinary Portland cement, blended cements, or non-Portland cements made with Supplementary Cementitious Materials. The admixtures contain complexes of metals with derivatives of hydroxycarboxylic acids, and improve properties of cement compositions, including setting, hardness, compressive strength, shrinkage, and freeze-thaw resistance. The invention discloses a method for improving the properties of hydraulic cements by adding the disclosed chemical admixtures to cement compositions, and also discloses methods of preparing said admixtures.

Abstract: An enzymatic ammonolysis process is provided for the preparation of intermediates used in preparing dipeptidyl peptidase IV inhibitors wherein the enzyme Candida antarctica lipase-B is used to catalyze the ammonolysis process.

Abstract: Coal combustion product cement compositions produced using classes of relatively low-cost industrial by-products and low-value minerals. A variety of highly sustainable cements with low-environmental impact can be provided. Coal combustion by-products and other wastes produced on the large scale from the burning of coal or coal and biomass in coal-fired power stations with or without low-value minerals, processed minerals, and/or by-products of the mining, mineral processing, metal refining, petrochemical, fine chemical, pharmaceutical, agrochemical, biotechnology, food, feed and energy industries, as well as agricultural and municipal by-products, can be utilized to provide improved cements and cementitious materials that are more economic and environmentally friendly than traditional cements including Portland cement.

Abstract: The invention provides systems, processes and methods for converting heterogeneous coal-fired power plants to cogenerate a sustainable, consistent, and economic cement. Such cogeneration enables a simultaneous production of both electric power and cement and thus provides significant economic and environmental efficiencies and benefits and eliminates a major source of greenhouse gas emissions and thereby mitigates a major contributor to climate change.

Abstract: Disclosed and claimed herein are novel biocatalysts for converting racemic mixtures of amino acids to an enantiomerically pure (S) form of the amino acid, methods for their use, and the enantiomerically enriched products of such biocatalytic processes.

Abstract: An enzymatic ammonolysis process is provided for the preparation of intermediates used in preparing dipeptidyl peptidase IV inhibitors wherein the enzyme Candida antarctica lipase-B is used to catalyze the ammonolysis process.

Abstract: An enzymatic ammonolysis process is provided for the preparation of intermediates used in preparing dipeptidyl peptidase IV inhibitors wherein the enzyme Candida antarctica lipase-B is used to catalyze the ammonolysis process.

Abstract: An enzymatic ammonolysis process is provided for the preparation of intermediates used in preparing dipeptidyl peptidase IV inhibitors wherein the enzyme Candida antarctica lipase-B is used to catalyze the ammonolysis process.