衍生

College of Veterinary Medicine, China Agricultural University, Beijing 100094, China Abstract: A method has been developed to determine residual stilbenes such as diethylstilbestrol, dienestrol and hexestrol in animal tissues using solid phase extraction and gas chromatography-mass spectrometry.

动物组织样品在碱性条件下用乙酸乙酯提取，经碳酸钠溶液液-液分配净化，再用硅胶柱固相萃取净化，洗脱液均分成两份后经氮气吹干，分别用双三甲基硅基三氟乙酰氨和七氟丁酸酐衍生，采用选择离子监测模式进行测定，外标法定量。

The univalent group N3- derived from hydrazoic acid.

从叠氮酸衍生而来的一价基 n。

A salt of hydrocyanic acid; cyanide.

有甲酸，含有甲酸，由甲酸衍生。

Viral replication and microbial translocation from the gut to the blood during HIV infection lead to hyperimmune activation, which contributes to the decline in CD4+ T cell numbers during HIV infection. Programmed death-1 (PD-1) and interleukin-10 (IL-10) are both upregulated during HIV infection.

加拿大蒙特利尔大学和美国佛罗里达免疫和基因治疗研究所的科学家合作进行的研究发现，膜蛋白PD-1和细胞衍生因子IL-10这两种分子联手作用，影响了艾滋病病人体内的CD4T细胞发挥正常作用，从而导致患者免疫系统受损并加快了患者病情的发展。

After extraction by ethanol and purification by cationic ion-exchange column, a method of using reversed-phase high-performance liquid chromatography and precolumn derivatization with o-phthalaldehyde and 9-fiuorenylmethylchloroformate is employed for determination of free amino acids in tobacco . This method assures that amino acids with amino and imino groups can be determined simultaneously. The results of duplication experiment and recovery experiment are acceptable.

本试验用乙醇提取烟叶中的游离氨基酸，并用阳离子交换树脂纯化，再用邻苯二甲醛、氯甲酸芴甲酯联合柱前衍生、反相高效液相色谱分析测定了烟叶中的游离氨基酸，该方法能同时测定烟叶中的带氨基和亚氨基基团的氨基酸，并且分析方法的重现性和回收率均令人满意。

What she means is that there is something inorganic, derivative and inauthentic about a lot of mobile communication.

她所说的是我们对过多的移动通话产生了某种无缘无故就衍生出来的虚假自我感。

Transgene-deried met-enkephalin accumulated in numerous nere cell bodies of trigeminal ganglion and was transported through the sensory nere fibers located in the infraorbital nere.

转基因衍生的蛋氨酸脑啡肽聚集在多数三叉神经节神经元细胞体中，并通过眶下神经感觉神经纤维进行输送。

Composed non-stop in forty-two "nights of veritable rapture", this is the younger Strauss's most celebrated and popular operetta - intoxicatingly melodious and exuberant.

轻歌剧《蝙蝠之谜》是奥地利作曲家小约翰˙施特劳斯的名作，据说他用了42天的时间，不眠不休地完成这首作品，故事说一场化妆舞会所接连衍生的一连串花花草草荒谬趣事。

For a long time, the US has slack monetary policy and loose invigilation on derivatives, leading to the rocketing of asset price and excessive liquidity. When the Subprime crisis triggered investors to re-value risks and de-leverage, the financial crisis within the US has emerged as global financial crisis.

由于美国长期奉行宽松的货币政策和对金融衍生产品创新的监管放任，导致资产价格过快上升和流动性过剩，当次贷危机引发投资者对风险重新估价和去杠杆化行为后，美国单一市场的金融危机演化为全球金融危机。

Sulfur compounds in the diesel were selectively derived into methylsulfonium salts by reacting with iodomethane in the presence of silver tetrafluoroborate, and characterized by positive-ion electrospray ionization fourier transform ion cyclotron resonance.

在四氟硼酸银的催化作用下，以碘甲烷对直馏柴油进行甲基衍生化反应，使其中的有机硫化物转变成极性较强的锍盐，再用电喷雾－傅立叶变换离子回旋共振质谱仪进行检测。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。