查询词典 2-butene

Seed cotton yield of 7.9 t/ha and 7.2 t/ha have been achieved under experimental conditions and under on-farm trials in farmers' fields (Bhatti, 1. M, et al, 1981). During 1991 at a private farm of Mr. Sadiq Akbar Bokhari in Multan area of Punjab, average yields of 3.5 t/ha equivalent to 1.2 t lint/ha from an area of 80 ha and 4.5 t/ha equivalent to 1.5 t lint/ha from an area of 20 ha were obtained. Recommended agronomic practices including the application of weedicide, pesticides, fertilizers (125-50-50 N-P2O5-K2O kg/ha) besides planting of cotton on ridges were followed. Crop was planted between 5-30 June and harvested between November and following February. Wheat was planted on 4 ha in standing cotton in the end of November and produced 2.8t/ha yield.

在试验条件下和农民田地的大田试验中已获得籽棉7.9吨/公顷和7.2吨/公顷的高产（Bhatti，I.M，等1981）。1991年在旁遮普省木尔坦地区，Sadiq Akbar Bokhari 先生私人农场的80公顷土地上，籽棉平均产量3.5吨/公顷，折合皮棉1.2吨/公顷，另外20公顷土地上籽棉4.5吨/公顷，折合皮棉1.5吨/公顷，推荐的农艺措施包括使用除草剂、农药、肥料（125-50-50 N- P2O5- K2O公斤/公顷）以及起垄种植棉花。6月5~30日种棉，11月至次年2月采收，11月底在4公顷站立棉株间套种小麦，单产小麦2.8吨/公顷。

This study concludes the following four parts:(1) acute toxicity of several chloroanilines to zebra fish;(2) effects of chloroanilines on antioxidant defense of crucian carp;(3) effects of chloroanilines on serum sex steroids in crucian carp;(4) effects of chloroanilines on lymphocyte proliferation in crucian carp, and the detailed results and main conclusions are concluded as follows

本论文以2-氯-4-硝基苯胺、4-氯-3-硝基苯胺、2-氯-5-硝基苯胺、2，4-二氯苯胺、3，4-二氯苯胺、2，5-二氯苯胺、2，3-二氯苯胺为研究对象，研究分为四部分：(1)氯代苯胺对鱼类的急性毒性；(2)氯代苯胺对鲫鱼抗氧化系统的影响；(3)氯代苯胺对鲫鱼血清性类固醇激素水平的影响；(4)氯代苯胺对鲫鱼淋巴细胞增殖的影响。

The optimum initial substrate concentration for cultivation of inoculum was 8%.The optimum conditions for batch fermentation were 0.04vvm of air flow,5.8 of pH value.The fed-batch fermentation showed that the productivity of Klebsiella pneumoniae CICC 10011 was better than K.pneumoniae CGMCC 1206.The maximum concentration of 2,3-butanediol and acetoin was 103.38 g/L (90.98 g/L of 2,3-butanediol),and the yield reached 82.2%of its theoretical value.The fermentation conditions for K.pneumoniae.

确定种子培养的最适初始底物浓度为8%；间歇发酵的条件为：微氧发酵，通气量为0.04vvm，pH值为5.8；通过批式流加发酵实验表明：Klebsiella pneumoniae CICC 10011的代谢产2，3-丁二醇能力要远高于K.pneumoniaeCGMCC 1206，2，3-丁二醇最高浓度达90.98g/L，2，3-丁二醇与乙偶姻浓度之和最高达103.38g/L，转化率为理论最大值的82.2%，其发酵工艺还有待于进一步优化。

At one point, Boxer has 4 Wraiths (2 cloaked, 2 uncloaked) and Anomia has 9 Scourge. 2 Scourge seek and destroy 1 Wraith. It looks bad for Boxer but he ingeniously takes the uncloaked Wraith and draws all 7 Scourge through dancing left to right, left to right, up and down with impressive micro.

在一点上，BOXER有2架幽灵战机，(2架隐型，2架未隐型)而AnomiA有9个鞭虫。2个找到并撞毁了1架幽灵战机，这看上去对BOXER不利，但他天才般的用1个没有隐形的幽灵战机带领着9个由通过左到右，由左到右，上到下的惊人操作让幽灵跳起了舞蹈。

The degree of substitution between Cu(superscript 2+) and Zn(superscript 2+) is increased with increasing Cu(superscript 2+)/Zn(superscript 2+) entering crystal lattices of Zn5(CO3)26/Cu2(CO3)2, and the ratio of copper to zinc in Rosasite and Aurichalcite is unchangeable.

随着Cu(上标 2+)/Zn(上标 2+)进入Zn5(CO3)26/Cu2CO32晶格，离子同晶取代量增加，催化剂前驱体中形成了固定铜锌比的锌孔雀石和绿铜锌矿物相。

Based on broad information collection, author compared and studied on the old synthesis process, and proposed the better process that started from benzyl chloride, then according to the sequence of " synthesis of benzylamine, synthesis of N-benzyl-N--acetamine, synthesis of 2-chloro-5-methylpridine ,2-chloro-5-trichloromethylpyridine,2-chloro-5-trifluropyridine " five steps to get the final product, CTFP.

本文在查阅大量文献资料和对2-氯-5-三氟甲基吡啶合成路线进行分析比较的基础上，提出了较佳合成路线，即以氯化苄为原料，合成的反应步骤为&苄胺&合成、&N-苄基-N--乙酰胺&合成、&2-氯-5-甲基吡啶&合成、&2-氯-5-三氯甲基吡啶&合成、&2-氯-5-三氟甲基吡啶&合成五步。

Three kinds of small molecular copper and zinc superoxide dismutase mimics were synthesized with N, N-bis (benzimidazol-2-ylmethyl) amine (N3), N, N-bis (benzimidazol-2-ylmethyl) methylamine(MN3) and N,N-bis (benzimidazol-2-ylmethyl) benzylamine(BN3) as ligands. The com-plexes were characterized by UV, IR and element analysis and the structures were proposed.

模拟铜一锌超氧化物歧化酶的活性中心，以二(2-苯并咪唑)丙烷为桥、二(2-苯并咪唑亚甲基)胺(N3)、二(2-苯并咪唑亚甲基)甲胺(MN3)及二(2-苯并咪唑亚甲基)苄胺(BN3)为配体合成了3种异双核的小分子模型化合物，并进行了紫外、红外表征及元素分析，推测了可能的结构。

Two compounds, [Cu4SO4]n (1) and [Cu(H2O)2SO4]n (2)(im = imidazole, bpy = 2,2'-bipyridine), were synthesized under solvothermal condition in 67% and 82% yields, respectively.

溶剂热体系下采用咪唑、2，2'-联吡啶为配体与硫酸铜合成了2种蓝矾衍生物：[Cu4SO4]n (1)和[Cu(H2O)2SO4]n (2)，产率分别为67%和82%。

Firstly, 3-ethylthiobutanal was prepared from crotonaldehyde reacting with ethanehiol in triethylamine with high yield. Secondly, methyl acetoacetate was converted to 6-ethylthiohept-3-en-2-one by three steps via hydrolysis, condensation with 3-ethyltio-butanal and dehydration, then 6-ethylthiohept-3-en-2-one was cycloco ndensed with dimethyl malonate by Michael addition and Claisen condensation, followed by saponification and decarboxylation to give the intermediate of 5-(2-ethylthiopropyl)-cyclohexane-1,3-dione.

首先，以巴豆醛与乙硫醇为原料，在三乙胺的催化作用下高收率制得3-乙硫基丁醛；然后从乙酰乙酸甲酯出发，通过碱水解、与3-乙硫基丁醛缩合、脱水三步反应合成6-乙硫基-3-烯-2-庚酮，接着6-乙硫基-3-烯-2-庚酮与丙二酸二甲酯通过Michael加成和Claisen缩合成环，再通过皂化和脱羧反应生成中间体5-[2-丙基]-1，3-环己二酮；再与丙酸酐反应丙酰化，最后与0-3-氯-2-丙烯基羟胺肟化，得到目标化合物烯草酮。

Firstly, dicyclopentyldichlorosilane, a reaction intermediate, was prepared under the optimal conditions of a reaction pressure range of 1.0-1.2 MPa, a n/n of 1.16, a reaction temperature range of 85-95℃, a catalyst dosage of 1.2 g, an isooctyl alcohol dosage of 2.3 g and a reaction time range of 6-7 h. The conversion of cyclopentene and the yield of DCPDCS were 96.2% and 88.9%, respectively.

首先研究了合成DCPDCS的最佳工艺条件：反应压力1.0~1.2 MPa，n/n= 1.16/1.00，反应温度85~95 C，催化剂用量1.2 g，异辛醇用量2.3 g，反应时间6~7 h，环戊烯转化率可达96%以上，DCPDCS收率可达88%以上。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐