The precursors are tobacco alkaloids, nitrate and nitrite.

Lysine is a precursor of certain alkaloids.

赖氨酸是某些生物碱的前体.

Three alkaloids were isolated from the root of Zanthoxylum laetum Drake.

从芸香科滑叶花椒(ZanthoxylumlaetumDrake)的根部分离出三种生物碱.

Conclusion: Alkaloids chemical constituents can be extracted and purified by this technology.

结论: 此工艺可用于生物碱类化学成分的提取纯化.

Considering an organic chemistry approach to alkaloids using biological and ecological explanation.

考虑到一门有机化学使用生物学和生态的解释接近生物碱.

OBJECTIVE : To determine content of aconitine type alkaloids in Baoxin decoction.

目的: 测定保心提取液中乌头类生物碱的含量.

The effective ingredient for opium alkaloids, most main is morphine.

鸦片的有效成分为生物碱, 最主要的是吗啡.

Aim To optimize the extraction procedure for alkaloids component in Kangfuxin Capsule.

目的研究康复欣胶囊处方中含生物碱成分的最佳提取工艺.

Asteroidea ( starfish ) contains saponins, sterols, anthraquinones, alkaloids phospholipids and some other components.

海星含皂苷 、 甾醇 、 蒽醌 、 生物碱和脂类等物质.

They include alkaloids, steroids, phenolics, saponins, tannins, resins, essential oils, various organic acids , and other componds.

它们包括生物碱 、 甾类化合物 、 酚类 、 皂角苷 、 丹宁 、 树脂 、 香精和各种有机酸等.

It may be composed of allelochemics such as alkaloids or terpenes.

它可以由异种化合物例如生物碱或萜稀组成.

Respiratory alkalosis may be associated with loratadine overdosage and patients should be monitored for this complication.

呼吸性碱中毒可能超剂量的氯雷他定有关,应当注意病人的这种并发症.

Chronic respiratory alkalosis ( CRA ) , CRA plus metabolic alkalosis and metabolic acidosis are seldom.

慢性呼吸性碱中毒 、 性呼吸性碱中毒并代谢性碱中毒和代谢性酸中毒是少见的.

Increased renal excretion occurs with both respiratory and metabolic alkalosis.

在呼吸性碱中毒和代谢性碱中毒中钾离子的肾排泄增加.

Alkalosis and potassium depletion may be pronounced.

可能有碱中毒和缺钾.

Recent advance in researches of alkane uptake by microorganisms was reviewed.

综述了近期在烃的微生物摄取机制方面的研究进展.

According to the heat release rate, the reaction pathway to ignition of sample alkane is analyzed.

利用新型的绝热量热仪研究了两种典型烷烃的自加热过程,采取了增大样品容器体积和加压的方法,得到了正庚烷和正十六烷的初始反应温度 、 大升温速率和最大升温速率对应的温度.

Conclusion: Volatile components of apple seed are organic acid, olefins, alkane, aldehyde, ketone, phenol.

结论: 苹果籽含有有机酸 、 烯烃 、 烷烃 、 醛 、 酮 、 酚类挥发性成分.

Esters are the major components , the other chemical constituents were alkane, acids, alcohol, aldehyde and ketone.

主要成分为酯类化合物,同时鉴定出烷烃类 、 酸 、 醇 、 醛、酮类化合物.

It'shows that alkane decomposes the least and the rate of deactivation is the slowest.

其中饱和烷烃分解率最小,催化剂失活速率最慢,为较佳的反应介质.

Given this understanding, the authors asked whether a sufficiently long alkane might be hydrophilic.

在此基础上, 论文作者问到,是否足够长的碳链会是亲水的.