nitrogen base是什么意思

用法例句

Influence of pretreatment process on nitrogen content of soybean protein fibre;

大豆蛋白纤维前处理工艺条件对含氮量的影响

Genotype differences of nitrogen content in cultivated rice seed.;

栽培稻种子含氮量的基因型差异

Reasons affecting nitrogen content of lime nitrogen, which is produced by converter process is analyzed.

分析了转炉法生产石灰氮中影响石灰氮含氮量的原因,通过合理掺用催化剂、调整炉料细度、改造原料配料系统等方法,优化了生产工艺条件,稳定了炉料配比以及炉料的发气量,提高了石灰氮的含氮量,氮的质量分数稳定在22。

Five calix[4]arenes bearing nitrogenous group had been synthesized by introducing three different nitrogenous groups in the lower rim.

以对叔丁基苯酚为起始原料,经过3步反应,在母体杯芳烃的下沿引入3种不同的含氮基团,得到5种含氮杯[4]芳烃,并通过1HNMR和熔点测定确定了产物结构。

In order to search for the new pyrazolyl-heterocycles lead compounds, eight pyrazolyl-(heterocycles) were synthesized from 3-ethyl-1-methyl- 4-substituted-5-pyrazolecarboxylic acid chloride and nitrogen heterocyclic rings such as 3-methyl-5-pyrazolone, 1H-3-ethyl-5-pyrazole (carboxylic) (ethyl) ester, etc.

为了寻求新的含吡唑双杂环先导化合物,用 4 取代 1 甲基 3 乙基 5 吡唑甲酰氯与 3 甲基 5 吡唑酮、3 乙基 5 吡唑甲酸乙酯等含氮杂环反应得到了 8个新的含吡唑环的双杂环类化合物。

The general situation of nitrogen-containing flavor;

本文给出了美国食品香料与萃取物制造者协会(FEMA)对外公布的一般认为安全(GRAS)的含氮香料165种,对它们进行了分类,并对其合成、香气特征和应用进行了介绍。

The promotion effects of N-donor ligands for catalytic oxidative carbonylation of methanol were studied.

研究了几种单齿和双齿含氮配体在氧化羰化反应中的助催化性能。

Rapid assay methods for detecting nitrogenous compounds in cheese;

干酪中含氮物的快速测定方法

The developing process of a suit of certified reference materials of nitrogen cast iron for spectrum analysis was in-troduced.

介绍一套含氮铸铁光谱分析标准物质的研制过程。