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The pancreatic proterses trypsin,chymotrypsin and elastase are all derived from zymogen precursors by proteolytic activation.

胰腺的蛋白水解酶—胰蛋白酶、胰凝乳蛋白酶和弹性蛋白酶都从酶原前体衍生而来，即由蛋白水解而活化的。

An alkaloid, C19H22N2O, derived from the bark of various cinchona trees and used as an antimalarial agent.

金鸡纳宁，辛可宁一种生物碱，c19h22n2o，由金鸡纳树的树皮中制得，用作抗疟疾剂

AIM: To synthesize 2 novel chiral ligands derived from cinchona alkaloids and study their catalytic performance in asymmetric dihydroxylation of 5 olefins.

目的：合成两种新的金鸡纳生物碱类衍生物配体并将其用于催化五种烯烃的不对称二羟化反应，考察催化效果。

Ferulic acid is a plant-food-derived antioxidants with hydroxy -cinnamate structure. It is wildly occurring in many kinds of fruits, vegetables, berries and grains.

中文摘要阿魏酸是一个富含於植物中，属hydroxycinnamate类结构的抗氧化物，可在多种的蔬菜、水果、谷类、稻米中发现。

If there is an express integrity and the corresponding ciphertext But achieving deciphering function, which is derived encryption keys.

如果有完整的明文和对应的密文可是实现破译功能，即得出加密密钥。

We derived Gauss law and Ampere circuital theorem using the concept of solid angle.

用立体角概念和计算式导出高斯定律、安培环路定律，并举实例说明对具有一定对称性的静电场与恒定磁场的场强分布可以较简捷地求

And the limit of the pressures that is not varied about an axis distributed in a hollow circular cylinder is derived.

但以往的文献将其简化为只在柱面上受均布压力，且将其化为二维空间的问题去求解 [4 ]。

Another formula for calculation sub-flow rate of dense medium suspension is derived based the principle of balance of non-magnetic material in circulating medium .

根据循环介质非磁性物平衡原则，推出重介悬浮液分流量另一计算公

The name "Citrine" is derived from the French word for lemon.

这个名字"黄晶"来源于法语词的柠檬。

The other commonly used method of fractional-N synthesis is to drop an output clock pulse based on some rule derived from a counter state machine.

微少-N 综合的普遍二手方法将降低以起源于一部柜台州机器的一些规则为基础的输出时钟脉膊的另一个。

And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时，论述了一体化管理体系构建中的几个主要问题，包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。