凯氏定氮法

高温快速消化与国标消化的凯氏定氮法测定蛋白质含量的比较研究

Comparative Study of Protein Levels Detected by Thermophilic Tachy-digestion and Encoding Standard Digestion of Kjeldahl Determination

研究了HAT、催化剂NaOH、反应温度和反应时间对合成阳离子香豆胶（CFG）的影响，用凯氏定氮法测定了CFG的取代度。

The effects of HAT , catalyst NaOH , temperature and reaction time on degree of substitution ( DS ) were investigated . DS of CFG was determined through micro Kjeldahl method .

并用凯氏定氮法、傅里叶变换红外光谱和1H核磁共振确定了合成产物的化学结构。

Micro-kjeldahl method , 1H NMR and FTIR were employed to characterize the chemical structure of the as-synthesized products . A series of polyureas with various chain extenders were prepared .

蛋白质测定方法主要有考马斯亮蓝法（CBBG-250）、紫外吸收法（UV）和凯氏定氮法。

There are mainly three methods in the determination of proteins : Coomassie brilliant blue G-250 ( CBB G-250 ), UV absorption ( UV ) and micro-Kjeldahl .

方法应用四唑盐（MTT）比色法分析细胞增殖，倒置显微镜观察细胞形态学变化、凯氏定氮法测定细胞蛋白质的含量、流式细胞术定量检测细胞凋亡。

Methods Cell proliferation was examined by MTT assay technique , cell morphological transformation was observed by inverted microscope and the content of cell protein was determined by Kjeldahl definition nitrogen method while cell apoptosis was precisely detected by flow cytometry .

研究了饲料粗蛋白质快速测定方法，利用高氯酸和硒粉相结合缩短凯氏定氮法消化时间，使饲料样品在1min左右消化成无色或黄色溶液。

For rapidly determining crude protein in feeds perchloric acid and selenium powder were used in Kjeldahl N determination to reduce the digestion time of samples , which were digested into a colorless or yellow solution in about one minute .

提高凯氏定氮法蛋白质测定速度的研究

The Studying on Improving the Determination Rate of Protein with Kjeldahl

总氮含量测定采用凯氏定氮法。

Micro - Kjeldahl method was developed to determine total nitrogen .

盐析法分离制得牡蛎蛋白，经凯氏定氮法测得牡蛎粗提物中蛋白含量为38.6%；

Oyster protein was extracted from fresh oyster using salting-out method .

微量凯氏定氮法测定蛋白质含量；

Protein was assayed by Kjeldah method for nitrogen determination ;

凯氏定氮法是测定橡胶中氮含量的常规分析方法。

The Kjeldahl is a general analysis method for determining nitrogen in rubber .

近红外光谱仪与凯氏定氮法测定油菜蛋白质含量的比较

The Comparison with NIRS and Keyes on Testing Protein Content of the Rapeseed

强化凯氏定氮法在蛋白质测定中的应用研究

The Application to Protein Determination by Strengthened Kjeldahl Method

凯氏定氮法测定大米蛋白质时蛋白系数的确定

Determination of Conversion Factor of Percent Nitrogen to Percent Protein in Rice Protein

凯氏定氮法测定粗蛋白应注意的几个问题

The problems that should pay attention to in Kjeldahl methods for determination of protein

凯氏定氮法消化装置的改进

Improvement of equipment of kjeldahl 's method

关于凯氏定氮法测定蛋白质的几个问题

Several Problems for Determining Protein by Kjeldahl

分光光度法测定总氮含量&改进微量凯氏定氮法

Determination of the Content of Total Nitrogen by Spectrophotometry Method & An Improvement of Micro-Kjeldahl Method

微波消解凯氏定氮法快速测定酱油中全氮

Rapid determination of total nitrogen in soy sauce by Kjeldahl method with micro-wave heated sample digestion

其结果与凯氏定氮法所测结果经t检验无显著差异。

The results had no remarkable difference by t test between indophenol-blue colorimetry and kjeldahl method .

用凯氏定氮法测得此条件下的蛋白质的水解率可达80.7%。

The protein hydrolysis ratio in this condition determined by Kjeldahl nitrogen method had reached 80.7 % .

凯氏定氮法测定人血白蛋白中蛋白质含量的不确定度评价

Evaluation of the Uncertainty for Content Determination of Protein in the Human Albumin by Kjeldahl Nitrogen Method

凯氏定氮法在测试氯乙烯-丙烯腈共聚树脂中丙烯腈含量的应用

The application of kjeldahl nitrogen determination method to the measurement of acrylonitrile content in vinyl chloride-acrylonitrile copolymer

流动注射法与凯氏定氮法测定土壤全氮的比较

Comparison of Determining the Soil Total Nitrogen Concentration with a Continuous Flow Injection Analyzer and Kjeldahl Method

采用凯氏定氮法和光谱法分析测定完达山奶粉系列中蛋白质的含量。

In this experiment , the content of protein was assayed by biuret method and Kjeldahl determination .

各种天然有机物总氮含量通常采用经典的微量凯氏定氮法测定。

The micro-Kjeldahl method is usually used for determination of the total Nitrogen content of various nature organic substances .

采用凯氏定氮法测定了明胶中胶原多肽的含量。

The percentage of collagen peptide was calculated from the nitrogen content of gelatin determined by the Kjeldahl method .

该方法操作简便，结果准确可靠，可替代微量凯氏定氮法。

The BCA method is simple and rapid with accurate result . The method can replace micro-Kjeldahl ′ s method .

采用凯氏定氮法，测定配套杂交肉鹅不同生长阶段羽毛、胴体和内脏的增重和蛋白质沉积量。

This feeding and slaughter trial determined the weight gain and protein deposition at different growing stages of meat goose .

国家标准规定的乳粉蛋白质测定方法是基于凯氏定氮法，因此理论上任何含氮物质的加入均折算成为蛋白质含量。

Determination of protein content of milk powder which is constituted by government standard is based on the classical Kieldahl method .