摘要:
In a process for the determination of total or bound cholesterol by liberating any bound cholesterol using cholesterol esterase and simultaneously or subsequently determining the liberated cholesterol and any initially free cholesterol with a cholesterol reacting enzyme, the improvement comprising using as the cholesterol reacting enzyme an NAD or NADP-dependent cholesterol dehydrogenase obtained from an anaerobic microorganism, e.g., Eubacterium sp. ATCC 21408, or from mammalian tissue, e.g., liver.
摘要:
Cholesterol is determined by incubating a sample suspected of containing cholesterol in an aqueous medium with cholesterol oxidase and determining either the oxygen consumption, the hydrogen peroxide formed, or cholestenone, as a measure of the initial cholesterol content; reagent compositions comprising cholesterol oxidase and a system for the determination of H.sub.2 O.sub.2 or for the determination of cholestenone are provided.
摘要翻译:胆固醇通过将怀疑含有胆固醇的样品置于水性介质中与胆固醇氧化酶并测定氧消耗,形成的过氧化氢或胆碱酯酶作为初始胆固醇含量的量度来确定; 提供了包含胆固醇氧化酶的试剂组合物和用于测定H 2 O 2或测定胆碱酯的系统。
摘要:
Cholesterol oxidase free of unstabilizing residual traces of detergent is activated by adding to the cholesterol oxidase, before use thereof, at least one surface-active compound with lipophilic and hydrophilic properties. Diagnostic agents for determining cholesterol comprising cholesterol oxidase, a hydrogen peroxide detection system, a buffer, and at least one surface-active compound having lipophilic and hydrophilic properties are provided.
摘要:
The new enzyme steroid-.DELTA.-isomerase is provided, as well as a process for producing same, comprising digesting a micro-organism containing said isomerase, extracting same by destruction of the cell wall with a buffer solution containing a non-ionic surfactant, centrifuging the resulting mass and discarding the precipitate, applying the extract to an anion exchanger, eluting the enzyme with a buffer solution containing a non-ionic surfactant, heating the eluate, separating the precipitate and isolating the enzyme therefrom from the supernatant.
摘要:
Cholesterol is determined utilizing cholesterol oxidase, and optionally cholesterol esterase to cleave bound cholesterol, in the presence of peroxidase, p-amino-phenazone, a surface-active agent and phenol, the improvement comprising employing an alkanol of up to 4 carbon atoms in the test composition or sample to substantially overcome test error and deviations due to turbidity formation.
摘要:
The activity of alkaline phosphatase in aqueous solution, especially in reconstituted serum, is kept constant by adding to the phosphatase-containing solution Mn.sup.2+ or Cd.sup.2+ ions, preferably to an end concentration of 0.05 to 0.5 mMol/liter of Mn.sup.2+ or 0.05 to 0.1 mMol/liter of Cd.sup.2+. Control serums comprising the Mn.sup.2+ and/or Cd.sup.2+ ions in human or animal serum or serum-like compositions are also provided.
摘要:
In a process for the determination of substrates or enzyme activities in a test batch, utilizing a conventional redox reaction as a measurement reaction, the improvement comprising carrying out the process in the presence of ascorbate oxidase; the addition of ascorbate oxidase substantially eliminates the interfering effect of ascorbic acid frequently found in the test sample.
摘要:
Method and reagent for the determination of the biological activity of heparin in plasma by adding thrombin or Factor X.sub.a as the proteolytic enzyme and a chromogen substrate of the latter and measuring the dye liberated from the chromogen substrate in the absence of exogenous anti-thrombin III, the improvement consisting of adding, additionally, at least one compound of the formula ##STR1## wherein X is oxygen or the group NR.sub.5 ;and R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are independently selected from hydrogen or alkyl of 1 to 2 carbon atoms.
摘要:
The present invention provides a process for the simultaneous determination of fibrinogen and fibrinogen fission products in plasma, wherein 0.01 to 1 U of a snake venom enzyme with a thrombin-like effectiveness is aded per ml. of sample plasma, then there is measured the period of time between the addition of the enzyme and the commencement of a turbidity formation as a measure for the amount of fibrinogen fission products and subsequently there is measured the speed of the turbidity formation as a measure of the amount of fibrinogen.The present invention also provides a reagent for the simultaneous determination of fibrinogen and fibrinogen fission products, wherein it comprises 0.01 to 10 U snake venon enzyme with thrombin-like effectiveness per ml. of sample plasma, 0.5 to 4% by weight of a water-soluble polyalcohol, 1 to 20 mMole/liter of calcium ions and 0.05 to 0.3 mole/liter of buffer of pH 7.0 to 8.0, referred to the solution ready for use, as well as optionally a detergent.
摘要:
The present invention provides a process for the detection or determination of fibrin monomer in biological fluids, wherein the sample fluid is incubated with hydrophobic latex and the agglutination determined.The present invention also provides a reagent for the detection or determination of fibrin or fibrin monomer in biological fluids, wherein it contains hydrophobic latex.