摘要:
The present invention relates to a method for determining a slight amount of NADH or XTP which is present in a solution, with high sensitivity by the use of an NADH kinase specific for NADH by utilizing a cycling reaction, and this method permits highly sensitive determination of NADH without any influence of NAD.sup.+ and hence is useful for diagnoses of diseases and the like.
摘要:
The present invention relates to a novel NADH kinase which has high stability and is specific for NADH, and a process for producing the NADH kinase by culturing a yeast belonging to the genus Pichia in a culture medium, and this enzyme permits highly sensitive determination of NADH alone and hence is useful in the field of clinical medicine.
摘要:
The present invention relates to a novel cycloisomaltooligosaccharide selected from the group consisting of novel cycloisomaltoheptaose having a cyclic structure composed of 7 glucose residues in .alpha.-1,6 linkage, novel cycloisomaltooctaose having a cyclic structure composed of 8 glucose residues in .alpha.-1,6 linkage and novel cycloisomaltononaose having a cyclic structure composed of 9 glucose residues in .alpha.-1,6 linkage, novel cycloisomaltooligosaccharide synthase forming said oligosaccharides from dextran, and a process for producing said oligosaccharides by use of said enzyme or a microorganism capable of producing said enzyme.
摘要:
A method for the assay of .alpha.-amylase activity, which comprises adding an .alpha.-amylase-containing sample to maltohexaitol or maltohexaonic acid used as substrate, reacting, at the same time or subsequent to the addition, .alpha.-glucosidase with the resulting mixture, and determining the reaction product to assay the .alpha.-amylase activity.
摘要:
L-Fucose dehydrogenase having the following Physicochemical properties (1) and (2):(1) Action and substrate specificityIt withdraws hydrogen from L-fucose and converts into L-fuconolactone and at the same time, reduces coenzyme NADP.sup.+ to NADPH.(2) pH and stable pH rangeWhen Tris-imidazole-sodium acetate buffer solution is used, the optimum pH is in a range of 9.0 to 10.0 and the stable pH range is between 8.0 and 10.5.The L-fucose dehydrogenase utilizing NADP.sup.+ as coenzyme can be obtained by culturing L-fucose dehydrogenase-producing strain belonging to the genus Pseudomonas in a medium and collecting formed L-fucose dehydrogenase from the culture.L-Fucose can be quantitatively determined by reacting a sample containing L-fucose with L-fucose dehydrogenase requiring NADP.sup.+ as coenzyme and assaying NADPH produced.
摘要:
An N-acetylhexosamine oxidase having the following physiochemical properties.(1) Action and specificity for substrateOxidizes N-acetylhexosamine in the presence of oxygen to form N-acetylhexosaminic acid and hydrogen peroxide. Hardly acts or does not act at all on hexose and hexosamine.(2) Optimum pH and stable pH rangeWhen a potassium phosphate buffer solution contining 0.1M glycine is used, an optimum pH is 7.5 to 8.5 and a stable pH range is 3 to 9.(3) Molecular weightHas a molecular weight of about 140,000 to 150,000 when measured according to a gel filtration method using Sephadex G-200 by the use of 0.05M potassium phosphate buffer solution.
摘要:
In image-capture inspection of electronic displays, the object of the present invention is to reduce moire generation, improve inspection precision by making pixel defects easier to discover, and allowing quantitative evaluation of these pixel defects. The relative positioning of the electronic display and an imaging element is changed by very small amounts of 1/n of the pixel pitch. The n images are arranged by pixel and the images are combined by taking the moving average of the image data values to reduce the image-capture moires generated during the image capture operations. The composite image is used to inspect pixel defects in the electronic display.
摘要:
An electron microscope resolving power evaluation method for evaluating performance of a scanning electron microscope without resorting to visual sensory analysis for minimizing a difference in deterioration with age and in performance among individual scanning electron microscopes. A specimen is prepared by overlaying materials having different emission coefficients of secondary charged particles such as secondary electrons, backscattered electrons, transmitted electrons, etc., a cross-section including an overlaid material part of thin-film layers having known dimensions is mirror-finished, data of a scanning electron microscopical image of the cross-section, including the overlaid material part is obtained, and then the resolving power performance of the scanning electron microscope is evaluated quantitatively by means of frequency analysis, etc.
摘要:
N-acetylmannosamine dehydrogenase gene derived from a microorganism belonging to the genus Flavobacterium, e.g., Flavobacterium sp. No. 141-8 strain and defined by a specific restriction enzyme map which encodes 271 amino acid sequence. Using the recombinant DNA, N-acetylmannosamine dehydrogenase can be produced in a simpler manner in an industrial scale. The enzyme is useful for quantitative determination of sialic acid.
摘要:
The invention discloses an auxiliary head lamp device for a car equipped with a cover which is optionally fitted to a car and is lit during driving in fog or the like. The cover of this device can be opened when a solenoid of a cover driving mechanism is energized by operating a switch disposed inside the room of the car. The solenoid releases engagement of a stopper that restricts the cover urged in the opening direction. The switch may be used also as a switch for a light source bulb. After the solenoid is energized and the opening operation of the cover starts, a current to the solenoid is automatically cut off so that over-heat or burn-out of the solenoid that would occur if the current is continuously applied thereto can be prevented.