先导的

Results Based on the botanical metabonomic concept, a novel valuable sesquiterpene compound has been quickly isolated from the aerial part of Carpesium lipskyi.

结果以基于植物代谢组学概念的混合物氢谱测定方法为指导，从高原天名精中快速分离得到有价值的倍半萜类化合物，避免了天然产物化学经典分离方法的大量、无意义的重复实验，提高了发现先导化合物的效率。

It became a common investment method with a enormous power to push the science and technology forward rapidly since nineteen seventieth, due to the government encouragement, when the competition of the science and technology became tough and the methodology of financial supports quickly developed.

它是国民经济的先导产业，关系到国家的综合竞争实力。风险投资作为一种特殊的投资形式，对推动高新技术的发展起着十分重要的作用。

Major component of the operating companies have high-speed reel sheeter Products Company to person-centered, market-leader in technology-based columns, as a means to manage, to the quality of survival, and constantly develop to meet the user requirements of product and process technology, preferential the price in good faith for the new and old customers at home and abroad to provide convenient service.

公司主要的经营产品有高速卷筒切纸机本公司以人为本，以市场为先导，以技术为主柱，以管理为手段，以质量求生存，不断开发满足用户要求的产品和加工工艺，以优惠的价格真诚为海内外新老客户提供便捷周到的服务。

Leaded by scientific and technological progress, focused on special products and products for specific uses, based on its advantages of great variety of goods, sound credit and large-scale production, Tianjin Tiansheng will constantly improve itself, and strive to be a group that can meet requirements in domestic and international market.

天津天绳秉承求实创新，进取争先的企业精神，将推行全新科学管理体系、不断改进公司的管理机制，以科技进步为先导，以专用产品和特殊用途产品为重点，发挥产品种类齐全，企业资信好，生产规模大的优势，不断完善自己，在立足本行业发展的同时逐渐向集团化过渡，满足国内外市场的需求。

Triazole is an interesting moiety, which plays an important role in biological activity. In recent years, many efforts have been paid to develop 1,2,3-triazole derivatives on the basis of many lead compounds with various pharmacological activities, and quite a few successful examples have been seen. Unfortunately, in contrast with 1,2,4-triazole, 1,2,3-triazole has only a few ways to be prepared.

1，2，3-三氮唑类化合物所具有的广泛生物活性正受到人们的日益重视，在已有的和新开发的各类药物中常可见1，2，3-三氮唑的结构，而以它为药效基团改良各种先导化合物取得成功的例子也屡见不鲜。

Faced with a serious shortage of teaching facilities of the reality, in the Vice-Chancellor LEE Wing under the leadership of Comrade years, always as the guide to moral education, teaching-centered,"civilization, truth-seeking, pioneering and enterprising" as the school policy, strengthen the management and reform, since 1991 has been made in junior high school graduates will have the first 7, 93 the second year of good results by the prefectural, county, the Government and the County Board of Education Award in recognition of the many.

面对教学设施严重不足的现实，在校长李永年同志的带领下，始终以德育为先导，教学为中心，"文明、求实、开拓、进取"为办学方针，强化管理和教改，自1991年至今已取得了初中毕业会都7个第一名、93年第二名的好成绩，受到地委、县委、政府及县教委的多次表彰奖励。

In summary, 4, 6-dimethoxy-2-substituted pyrimidine benzylamine is chosen as a lead compound based on the possibility of synthesis, optimization, and the herbicidal activity.

考虑到合成的可行性、分子结构的可修饰性和除草活性的大小，确定4，6-二甲氧基-2-取代嘧啶苄胺类化合物为除草剂的先导结构。

The pyrimidine lead compound is obtained via herbicidal activity screen. The optimization of lead compound leads to find the good pyrimidine benzylamine candidates with highly effective herbicidal activity. The novel herbicidal mechanism of pyrimidine benzylamine is put forward. N-(2-bromophenyl)-2-(4, 6-dimethoxypyrimidin-2-yloxy)benzylamine (103-1) has potential as a new selective post-emergent herbicide in oilseed rape.

通过系统的研究工作，发现了具有除草活性的嘧啶先导结构，经结构优化，筛选出具有高除草活性的嘧啶苄胺类优选结构，发现并提出了此类化合物的除草作用新机理，最终经田间试验证实了N-(2-溴苯基)-2-(4，6-二甲氧基-2-嘧啶氧基)苄胺(103-1)可作为超高效油菜田除草剂进行工业性的研究与开发。

Because of the herbicidal activities found in all the acrylate derivatives(3),they may be regarded as the lead herbicidal compounds to study further.

所合成的目标化合物3在2000g ai/hm2的剂量下均具有一定的除草活性，可作为除草活性的新型先导化合物供进一步优化研究。

Preliminary bioassay showed that all the synthesized compounds just showed a poor inhibition rate (0~45%) at 500 mg/L, much weaker than (72%~87%). The result suggested that chloro-atom on 2-position of pyridine ring may be indispensable for herbicidal activity.

初步除草活性测定结果表明，在500mg/L剂量下，所有化合物的除草活性（抑制率0~45%）远低于先导化合物（抑制率72%~87%），说明吡啶环2-位上的氯原子可能对维持该类化合物的除草活性是必需的。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。