摘要:
The present invention provides a process for the determination of the activity of glutamateoxalacetate-transaminase (GOT) in aqueous solutions in which(a) .alpha.-ketoglutarate is reacted with alanine-sulphinic acid, catalyzed by GOT, to give pyruvate, sulphur dioxide and glutamate,(b) the resultant pyruvate is reacted with phosphate and oxygen, catalyzed by pyruvate oxidase, to give acetyl phosphate, carbon dioxide and hydrogen peroxide,(c) the hydrogen peroxide and a chromogen is reacted, catalyzed by a peroxidase, to give a dyestuff and water and(d) the amount of dyestuff formed is determined, wherein the chromogen used is N-(3'-sulphonyl-4'-hydroxy-5'-chlorophenyl)-4-aminoantipyrine (SHYC-AA), 4,5-bis-[4-dimethylaminophenyl]-2-[3,5-dimethoxy-4-hydroxyphenyl]-imidazole (B-DDH-imidazole) or a related substance.The present invention also provides an analytical agent for the determination of the activity of GOT, comprising .alpha.-ketoglutarate, alanine-sulphinic acid, a chromogen, peroxidase, pyruvate oxidase, soluble phosphate, buffer and water, wherein the chromogen is N-(3'-sulphonyl-4'-hydroxy-5'-chlorophenyl)-4-aminoantipyrine (SHYC-AA) or 4,5-bis-[4-dimethylaminophenyl]-2-[3,5-dimethoxy-4-hydroxyphenyl]-imidazole (B-DDH-imidazole).
摘要:
.alpha.-Amylase is determined by the enzymatic splitting of an .alpha.-amylase substrate and measurement of a fission product, wherein there is used as a substrate a maltoheptaose compound of the formula ##STR1## wherein R is a glucoside, phenylglucoside, mononitrophenylglucoside, dinitrophenylglucoside, sorbitol or gluconic acid group. Reagents comprising such a substrate and a system for the determination of a fission product formed from the amylase substrate by .alpha.-amylase, are also provided.
摘要:
.alpha.-Amylase is determined by the enzymatic splitting of an .alpha.-amylase substrate and measurement of a fission product, wherein there is used as a substrate a maltoheptaose compound of the formula ##STR1## wherein R is a glucoside, phenylglucoside, mononitrophenylglucoside, dinitrophenylglucoside, sorbitol or gluconic acid group. Reagents comprising such a substrate and a system for the determination of a fission product formed from the amylase substrate by .alpha.-amylase, are also provided. A process for the preparation of a maltoheptaose will Bacillus macerans amylase, free of p-nitrophenyl-alpha-glucoside splitting activity is disclosed.
摘要:
Method for determining .alpha.-amylase by incubating with a starch substrate, wherein the substrate is based upon particulate starch derivatized with detectable groups for the determination of .alpha.-amylase, the substrate consisting of superficially cross-linked starch or amylose grains having a regulated, reduced swellability, said grains having a diameter of from 0.01 to 0.20 mm; these grains are prepared by suspending non-swollen grains in a solution with only enough cross-linking agent to achieve superficial cross-linking and then derivatizing the grains with the detectable groups for the determination of .alpha.-amylase.
摘要:
An agent for the elimination of turbidity in serum, especially in serum samples wherein photometric measurements are to be made, consisting essentially of one or more mono- or di-esters of polyethylene glycol and fatty acids of 9 to 14 carbon atoms with at most 8 ethylene oxide units per fatty acid moiety in the molecule, said esters having an HLB value of from 8 to 12.8.
摘要:
A memory circuit arrangement and fabrication method thereof are presented in which the parts of the memory circuit arrangement are situated on two different substrates. An integrated memory cell array is situated on one substrate. An integrated control circuit that controls access to the memory cells is situated on the other (logic circuit) substrate. The control circuit controls sequences when reading, writing or erasing content of a memory cell. The logic circuit substrate also contains a CPU and encryption coprocessor. The memory circuit contains a sense amplifier, with the aid of which the memory state of a memory cell can be determined, and a decoding circuit that selects a word or bit line.
摘要:
A memory circuit arrangement and fabrication method thereof are presented in which the parts of the memory circuit arrangement are situated on two different substrates. An integrated memory cell array is situated on one substrate. An integrated control circuit that controls access to the memory cells is situated on the other (logic circuit) substrate. The control circuit controls sequences when reading, writing or erasing content of a memory cell. The logic circuit substrate also contains a CPU and encryption coprocessor. The memory circuit contains a sense amplifier, with the aid of which the memory state of a memory cell can be determined, and a decoding circuit that selects a word or bit line.
摘要:
The invention relates to a fluorescent coating for Hg low-pressure discharge lamps, comprising a fluorescent composition from at least one green fluorescent material emitting in the green spectral range, especially a Tb- and/or Eu-doped green fluorescent material, and a red fluorescent material emitting in the red spectral range, especially a Eu and/or Mn red fluorescent material. The invention is characterized in that a further fluorescent material is present which is adapted to absorb UV Hg and Hg-Vis radiation.
摘要:
A patterned connection plane between two semiconductor chips which are connected using face-to-face technology is patterned into first pads, second pads, and conductor strips which are alternatively connected to one of these pads. The conductor strips are connected to a read-out circuit in one of the semiconductor chips via connections.
摘要:
.gamma.-Glutamyl-4-nitroanilide compounds of the formula ##STR1## wherein R is a .gamma.-glutamyl radical and X is an acid group, and salts of such compounds, are used to determine .gamma.-glutamyl-transpeptidase by contacting a sample suspected of containing .gamma.-glutamyltranspeptidase with said compound and glycylglycine and determining the liberation of the resulting p-nitro-aniline compound as a measure of the .gamma.-glutamyltranspeptidase activity initially present in the sample.