The present invention provides a method for fermentative hydrogen production under limited aerobic conditions by utilizing the respiratory interaction between a strictly anaerobic hydrogen producing bacterium, E. harbinense YUAN-3, and a facultative anaerobic bacterium, P. aeruginosa PAO1. The two bacteria are co-cultured to produce hydrogen gas in a culture medium without any anaerobic treatment. Sucrose, lactose or glucose are used as the carbon source for the co-culture which can promote the growth of E. harbinense YUAN-3 and reduce substrate competition between two bacteria. L-cysteine is added to increase the hydrogen yield and the production rate. Using 15 g/L glucose and 5 mmol/L L-cysteine, the invented method achieved the hydrogen production yield of 1.11 mol-hydrogen/mol-glucose.

The present invention provides a method for fermentative hydrogen production under limited aerobic conditions by utilizing the respiratory interaction between a strictly anaerobic hydrogen producing bacterium, E. harbinense YUAN-3, and a facultative anaerobic bacterium, P. aeruginosa PAO1. The two bacteria are co-cultured to produce hydrogen gas in a culture medium without any anaerobic treatment. Sucrose, lactose or glucose are used as the carbon source for the co-culture which can promote the growth of E. harbinense YUAN-3 and reduce substrate competition between two bacteria. L-cysteine is added to increase the hydrogen yield and the production rate. Using 15 g/L glucose and 5 mmol/L L-cysteine, the invented method achieved the hydrogen production yield of 1.11 mol-hydrogen/mol-glucose.

Methods and compounds are disclosed for irreversibly inhibiting a DNA repair enzyme that possesses lyase activity.

The present disclosure provides methods for generating sugars from a cellulosic biomass. The methods combine treatment of the biomass using a high-shear milling device and saccharification of the biomass to partially hydrolyze the biomass. The biomass can be saccharified either after or simultaneously with the high-shear milling treatment. The partially hydrolyzed biomass is then separated into a solids stream with saccharification enzymes, and a liquid stream with sugars. The solids stream and associated enzymes are further incubated under saccharification conditions to produce additional sugars, or are recycled and added to fresh biomass, which is saccharified under high-shear milling conditions. The methods result in improved conversion of cellulosic biomass to glucose.

The present disclosure provides methods for generating sugars from a cellulosic biomass. The methods combine treatment of the biomass using a high-shear milling device and saccharification of the biomass to partially hydrolyze the biomass. The biomass can be saccharified either after or simultaneously with the high-shear milling treatment. The partially hydrolyzed biomass is then separated into a solids stream with saccharification enzymes, and a liquid stream with sugars. The solids stream and associated enzymes are further incubated under saccharification conditions to produce additional sugars, or are recycled and added to fresh biomass, which is saccharified under high-shear milling conditions. The methods result in improved conversion of cellulosic biomass to glucose.

A process for enabling the production of a particulate composition containing crystalline trehalose dihydrate is provided. Including allowing an -glycosyltrehalose-forming enzyme to act on liquefied starch derived from a microorganism of the genus Arthrobacter and a trehalose-releasing enzyme derived from a microorganism of the genus Arthrobacter along with a starch debranching enzyme and a cyclomaltodextrin glucanotransferase; allowing glucoamylase to act on the resulting mixture to obtain a saccharide solution containing ,-trehalose; precipitating crystalline ,-trehalose dihydrate from the above saccharide solution; collecting the precipitated crystalline ,-trehalose dihydrate by a centrifuge; and ageing and drying the collected crystals. Cyclomaltodextrin glucanotransferase derived from a microorganism of the genus Paenibacillus or a mutant enzyme thereof is used to increase the ,-trehalose content in the saccharide solution to over 86.0% by weight, on a dry solid basis, without passing through a fractionation step by column chromatography.

A process for enabling the production of a particulate composition containing crystalline trehalose dihydrate is provided. Including allowing an -glycosyltrehalose-forming enzyme to act on liquefied starch derived from a microorganism of the genus Arthrobacter and a trehalose-releasing enzyme derived from a microorganism of the genus Arthrobacter along with a starch debranching enzyme and a cyclomaltodextrin glucanotransferase; allowing glucoamylase to act on the resulting mixture to obtain a saccharide solution containing ,-trehalose; precipitating crystalline ,-trehalose dihydrate from the above saccharide solution; collecting the precipitated crystalline ,-trehalose dihydrate by a centrifuge; and ageing and drying the collected crystals. Cyclomaltodextrin glucanotransferase derived from a microorganism of the genus Paenibacillus or a mutant enzyme thereof is used to increase the ,-trehalose content in the saccharide solution to over 86.0% by weight, on a dry solid basis, without passing through a fractionation step by column chromatography.

A sugar composition comprising: at least 40% dissolved solids in an aqueous solution having a viscosity at least 10% lower than a 42 DE (Dextrose Equivalents) reference solution with a same dissolved solids concentration at a given temperature.

A sugar composition comprising: at least 40% dissolved solids in an aqueous solution having a viscosity at least 10% lower than a 42 DE (Dextrose Equivalents) reference solution with a same dissolved solids concentration at a given temperature.

The invention is directed to a method for recovering lactose from an aqueous lactose solution comprising a concentration step, wherein water is removed from the aqueous lactose solution by freezing out water at a temperature below the eutectic temperature of the aqueous lactose solution and at a lactose concentration higher than the eutectic concentration of the aqueous lactose solution, thereby obtaining a concentrated lactose solution; and a crystallization step, wherein at least part of the concentrated lactose solution is subjected to crystallization at a temperature above the eutectic temperature of the concentrated lactose solution, thereby obtaining lactose crystals.