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    • 9. 发明授权
    • Process and reagent for the specific determination of the cholesterol of
the HDL fraction
    • 用于特异性测定HDL级分胆固醇的方法和试剂
    • US4892815A
    • 1990-01-09
    • US107467
    • 1987-10-06
    • Lorenz KerscherBrigitte PautzGisela TrunkJoachim Ziegenhorn
    • Lorenz KerscherBrigitte PautzGisela TrunkJoachim Ziegenhorn
    • C12Q1/26C12Q1/44C12Q1/60G01N33/92
    • C12Q1/60G01N33/92G01N2800/044Y10S435/805Y10S435/962Y10S436/81Y10S436/824
    • The present invention provides a process for the specific determination of the cholesterol of the HDL fraction in the presence of the LDL fraction of serum lipoproteins. Pancreatic cholesterol esterase is used to liberate cholesterol, and the liberated cholesterol then reacts with cholesterol oxidase and oxygen to form hydrogen peroxide. The kinetics of either of hydrogen peroxide formation or oxygen consumption is measured within 2 to 15 minutes after the start of the reaction between cholesterol and the oxidase. The temperature is maintained within a range of 20.degree. C., during a predetermined time interval. Specific concentrations of reactants are maintained in the reaction solution, i.e., from 0.05 to 30 U/ml pancreatic cholesterol esterase; from 0.1 to 50 U/ml cholesterol oxidase; from 1.0 to 20 mMole/liter of a tenside of the bile acid group, and 0.1 to 10 g/liter of a non-ionic detergent. The pH is kept within a range of 5 to 9. In addition, a reagent is provided which is used for specific determination of HDL fraction cholesterol in the presence of the LDL fraction of serum lipoproteins. The reagent contains pancreatic esterase (0.05 to 30 U/ml); cholesterol oxidase (0.1 to 50 U/ml) a tenside of the bile acid grop (1.5 to 8 mMole/liter) and a non-ionic detergent (0.1 to 10 g/liter), all concentrations referring to the dilution used in the test. The reagent also contains a buffer at a pH of from 5 to 9, and a system for photometric determination of hydrogen peroxide.
    • 本发明提供了在血清脂蛋白的LDL级分存在下具体测定HDL级分的胆固醇的方法。 胰胆固醇酯酶用于释放胆固醇,然后释放的胆固醇与胆固醇氧化酶和氧气反应形成过氧化氢。 在胆固醇和氧化酶反应开始后2至15分钟内测量过氧化氢形成或氧气消耗的动力学。 在预定的时间间隔内将温度保持在20℃的范围内。 反应物的特定浓度保持在反应溶液中,即0.05至30U / ml胰胆固醇酯酶; 0.1至50U / ml胆固醇氧化酶; 1.0至20mMole /升的胆汁酸基的表面活性剂和0.1至10g /升的非离子型洗涤剂。 pH值保持在5〜9的范围。此外,提供了在血清脂蛋白的LDL级分存在下用于特异性测定HDL级分胆固醇的试剂。 试剂含有胰酯酶(0.05〜30U / ml); 胆固醇氧化酶(0.1至50U / ml)胆汁酸组织(1.5至8mMole /升)的表面活性剂和非离子型洗涤剂(0.1至10g /升),所有浓度均指试验中使用的稀释液 。 该试剂还含有pH为5至9的缓冲液和用于光度测定过氧化氢的系统。