关键途径

Propanediol oxidoreductase is the key enzyme in converting glycerol to 1,3-propanediol.

1，3-丙二醇氧化还原酶是以甘油为底物生产1，3-PD途径中的关键酶之一。

Glucose-6-phosphate dehydrogenase (G6PDH) and 6-phosphaogluconate dehydrogenase (6PGDH) are key enzymes in the plant pentose phosphate pathway.

葡萄糖-6-磷酸脱氢酶与6-磷酸葡萄糖酸脱氢酶是植物戊糖磷酸途径中的两个关键酶。

With the rapid development of information technology, the speed of global economic integration is prominently accelerated.

随着信息技术的飞速发展，全球经济一体化进程明显加快，质量已经成为构成企业竞争力的关键，加强质量管理是提升企业国际竞争力的重要途径。

Strengthening purchasing management is the key link for a corporation to lower cost, is the important method to ensure product quality, is the essential prerequisite to improve the corporation promptitude and is the important way to enhance corporation core competitiveness.

加强采购管理，是企业降低成本的关键环节，是保证产品质量的重要手段，也是提高企业敏捷性的必要前提和增强企业核心竞争力的重要途径。

Vitamin E, or tocopherol, is a lipid-soluble antioxidant and essential for human health. 2-methyl-6-phytyl-1, 4-benzo- quinol methyltransferase, one of the key enzymes in vitamin biosynthetic pathway in plants, converts 2-methyl- 6-phytyl-1,4-benzoquinol to 2,3-dimethyl-6-phytyl-1,4-benzoquinol.

维生素E是一类人体必需的脂溶性抗氧化剂，具有重要的生理功能。2-甲基-6-叶绿基-1，4-苯醌甲基转移酶是天然维生素E合成途径中的关键酶之一，催化MPBQ甲基化，生成DMPBQ。

Methyl-6-phytyl-1, 4-benzo- quinol methyltransferase, one of the key enzymes in vitamin biosynthetic pathway in plants, converts 2-methyl- 6-phytyl-l,4-benzoquinol to 2,3-dimethyl-6-phytyl-l,4-benzoquinol.

甲基。6。叶绿基。1，4-苯醌甲基转移酶是天然维生素E合成途径中的关键酶之一，催化MPBQ甲基化，生成DMPBQ。

This paper consults the key technology in the radon measurement device in the national and international and we thinks over the characteristic of α-ray which emit by radon and its daughter, so that decides to use the α-ray spectrum to measure radon.

论文从测量氡及其子体放射出的α射线入手，瞄准国内外测氡装置关键技术发展趋势，结合氡及其子体α能谱测量特点，采用α能谱测氡的途径来完成这一工作。

The test result shows:(1) Concentration after grind finely, multi product configuration, regrind and reconcentratipn of sulphide iron ore, and firstly recovering tin and removing sulfide ore as possible as are available metholds to improve the grade and recovery of tin concentrate, simplify technology flowsheet and reduce production cost;(2) Intensifying the recovery of single stage concentration table is the key to concentration to concentration after grind firely and improving index. The recovery of fine tin is sure to further improve index;(3) Regrind and reconcentration of ferro-sulphur ore may recovery some tin.

试验研究结果表明：(1)细磨入选，多产品结构，硫化铁矿物再磨再选，能拿早拿、能丢早丢，预先脱出硫化矿物是提高锡精矿品位和回收率，简化工艺流程，降低生产成本的有效途径；(2)强化一段摇床的回收是细磨入选，提高指标的关键，细粒锡石的回收是进一步提高指标的根本保证；(3)硫铁矿物再磨再选也可回收部分锡金属。

In this paper,it introduces the ways from four aspects to improve the quality of teaching affairs management:to improve the quality of titles is the key to improve the quality of whole examination;to enhance the test management work is the protection to improve the quality of whole examination;to build and complete the examination question bank is the development trend to improve the work of examination scenically and stander;to build the evaluation system for examination quality is the necessary condition to improve the examination quality.

本文从四个方面提出了高校教学管理工作中如何提高考试工作质量的途径：提高试卷命题的质量是提高整个考试质量的关键；加强考试组织管理工作是提高整个考试质量的保障；建立和完善试题库是促进考试工作科学化、标准化的发展方向；建立考试质量评价系统推动考试质量不断提高。

Squalene synthase（EC.2.5.1.21, SS）is an important key enzyme in biosynthesis pathway of plant sterols and terpenoids.

鲨烯合酶（EC.2.5.1.21，squalene synthase，SS）是植物甾醇和三萜化合物生物合成途径中的关键酶。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。