Abstract: The present invention discloses a novel method for biological reduction of the carboxylic acids to their corresponding aldehydes and/or alcohols with high productivity and high yield by using fungus in the category of basidiomycetes. This reduction is specific and selective for its functional group (—COOH), without affecting other functional group such as—R groups (—OH, —NH2, -alkyl, -alkyoxy) and their position, number on aromatic ring. The method of the invention relates to reduction of aryl acids to aldehyde and/or alcohols by employing a white rot fungus—Pycnoporus cinnabarinus, an organism of basidiomycete species, grown in vessel/column. The biotransformation was performed in vessel/column/fermentor with pH control, dissolved oxygen, membrane system, product extractor is attached.

Abstract: The present invention utilizes yeast Candida tropicalis (NRRL 12968) for xylitol production, as an alternative and unexplored strain with high bioconversion rate and stability at higher initial xylose concentration. Different parameters are optimized for batch fermentation of xylose to xylitol such as initial xylose concentration, aeration (vvm), agitation (rpm), percent inoculum addition, and oxygen transfer rate. Maximum xylitol yield of 0.7 g/g of xylose is obtained with 3.33% inoculum, 250 g/l of initial xylose concentration, 0.2 vvm of aeration rate, and two stage agitation strategy comprising of 500 rpm for 0-24 hrs and 400 rpm for 24-72 hrs at not more than 72 hrs of fermentation time. The present invention coins a novel process mode of fermentation where the batch process is extended with continuous fermentation at optimum dilution rate of 0.02/hr with effective residence time of 52 hrs. Productivity of ‘batch followed by continuous’ process is 2.5 gm/lit/hr which is 1.

Abstract: The present invention relates to a method for microbial fermentation and biotransformation of aromatic acids to aromatic acids with reduced carbon atoms of wide commercial importance using a culture of actinomycete species. Amycolatopsis sp or the mutant thereof is employed in the present invention to convert natural as well as synthetic aromatic acids to reduced carbon aromatic acids with wide applications. The said culture in the disclosed invention is adapted to grow at 37-46° C. to achieve the biotransformation of aromatic acid to reduced carbon aromatic acid is accomplished at 37-46° C. to obtain a higher yield of the product.

Abstract: The present invention discloses a novel method for biological reduction of the carboxylic acids to their corresponding aldehydes and/or alcohols with high productivity and high yield by using fungus in the category of basidiomycetes. This reduction is specific and selective for its functional group (—COOH), without affecting other functional group such as—R groups (—OH, —NH2, -alkyl, -alkyoxy) and their position, number on aromatic ring. The method of the invention relates to reduction of aryl acids to aldehyde and/or alcohols by employing a white rot fungus—Pycnoporus cinnabarinus, an organism of basidiomycete species, grown in vessel/column. The biotransformation was performed in vessel/column/fermentor with pH control, dissolved oxygen, membrane system, product extractor is attached.

Abstract: The present invention utilizes yeast Candida tropicalis (NRRL 12968) for xylitol production, as an alternative and unexplored strain with high bioconversion rate and stability at higher initial xylose concentration. Different parameters are optimized for batch fermentation of xylose to xylitol such as initial xylose concentration, aeration (vvm), agitation (rpm), percent inoculum addition, and oxygen transfer rate. Maximum xylitol yield of 0.7 g/g of xylose is obtained with 3.33% inoculum, 250 g/l of initial xylose concentration, 0.2 vvm of aeration rate, and two stage agitation strategy comprising of 500 rpm for 0-24 hrs and 400 rpm for 24-72 hrs at not more than 72 hrs of fermentation time. The present invention coins a novel process mode of fermentation where the batch process is extended with continuous fermentation at optimum dilution rate of 0.02/hr with effective residence time of 52 hrs. Productivity of ‘batch followed by continuous’ process is 2.5 gm/lit/hr which is 1.

Abstract: The present invention relates to a method for microbial fermentation and biotransformation of aromatic acids to aromatic acids with reduced carbon atoms of wide commercial importance using a culture of actinomycete species. Amycolatopsis sp or the mutant thereof is employed in the present invention to convert natural as well as synthetic aromatic acids to reduced carbon aromatic acids with wide applications. The said culture in the disclosed invention is adapted to grow at 37-46° C. to achieve the biotrans formation of aromatic acid to reduced carbon aromatic acid is accomplished at 37-46° C. to obtain a higher yield of the product.