Abstract: A flow blocking catheter including an inner tube, a flow blocking member and an outer tube is provided. The flow blocking member is self-expandable and sleeved on an exterior of the inner tube. At least a proximal end of the self-expandable flow blocking member is attached to an outer circumference of the inner tube. The outer tube is movably sleeved on the exterior of the inner tube to restrict an expansion of the flow blocking member. In this way, expansion of the flow blocking member is able to be controlled simply by pushing/retracting the outer or inner tube to offer a fast shifting between different configurations. The flow blocking member is able to occlude blood flow with a controllably expansion to lower stimulation to the wall of the blood vessel and avoid the easy bursting of the balloon.

Abstract: A method for the production of vanillic acid and vanillin from waste residue (niger) of rice bran oil by microbial fermentation and biotransformation is provided. The method of the present invention comprises the steps of hydrolization of ferulic acid esters in waste residue of rice bran oil to ferulic acid and further conversion into vanillic acid using microbial strain Aspergillus niger CGMCC 0774 screened and preserved by the present inventor, followed by conversion of vanillic acid to produce vanillin using another microbial strain Pycnoporus cinnabarinus CGMCC 1115. The method for the production of vanillin according to the present invention utilizes renewable source from rice processing and alleviates the environmental pollution caused by the chemical synthesis of vanillin.

Abstract: A method for the production of vanillic acid and vanillin from waste residue (niger) of rice bran oil by microbial fermentation and biotransformation is provided. The method of the present invention comprises the steps of hydrolization of ferulic acid esters in waste residue of rice bran oil to ferulic acid and further conversion into vanillic acid using microbial strain Aspergillus niger CGMCC 0774 screened and preserved by the present inventor, followed by conversion of vanillic acid to produce vanillin using another microbial strain Pycnoporus cinnabarinus CGMCC 1115. The method for the production of vanillin according to the present invention utilizes renewable source from rice processing and alleviates the environmental pollution caused by the chemical synthesis of vanillin.