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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 Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。