查询词典 2-butene

2A series of alternating polyamide-imideswith fluorenyl cardo structure was synthesized by "one-pot" polycondensation of cardo diamines,trimellitic anhydride and various aromatic diamines including p-phenylene diamine,m-phenylene diamine, 4,4\'-oxydianiline,3,4\'-oxydianiline,2,2-bis[4-(4-aminophenoxy)phenyl]propane, 2,2-bis[4-(3-aminophenoxy)phenyl]propane respectively using triphenyl phosphite as condensing agents.

采用&一锅法&O(来源：88AB57C论文网www.abclunwen.comne—pot Synthesis，由Cardo二胺、偏苯三酸酐和不同二胺包括对苯二胺、间苯二胺、4，4\'—二氨基二苯醚、3，4\'—二氨基二苯醚、2，2—双[4—(4—氨基苯氧基苯基]丙烷和2，2—双[4—(3—氨基苯氧基)苯基]丙烷合成了一系列含有芴基Cardo结构的交替聚酰胺酰亚胺。

Results The positive percentage in superficial gastritis, deep gastritis, gastritic ulcer, duodenal ulcer, chronic atrophic gastritis and gastric cancer, were 70.3, 72.2, 77.7, 69.2 and 25 respectively by URT, 59.2, 77.8, 71.4, 70.7, 75 and 78 respectively by PCR, and 48.1, 61.1, 70.3, 70.7, 66.7, 66.6 and 72.2 respectively by cagA gene probe detection. Conclusions Statistics suggest that cagA+ H.

结果 浅表性胃炎、深度胃炎、胃溃疡、十二指肠溃疡、慢性萎缩性胃炎及胃癌病人的检测结果是：尿酶检测阳性百分率为：70.3、72.2、77.7、69.2、25；PCR阳性百分率分别为：59.2、77.8、71.4、70.7、75、78；基因探针杂交检测阳性率分别为：48.1、61.1、70.3、70.7、66.7、66.6、72.2。

Results Male thickness of rubbed sclerotin at frontal protuberance, geison, arcus jugalis , mandibular angle and external occipital protuberance were 5.30±1.24, 2.33±0.24, 2.84±0.75, 6.25±0.75, 8.47±1.36mm; female thickness were 4.20±1.10, 2.10±0.15, 2.14±0.46, 5.10±0.45 and 6.73±1.10mm.

结果 男性额结节可去的骨质厚度5.30±1.24mm，眉弓部可去的骨质厚度2.33±0.24mm，颧弓可去的骨质厚度2.84±0.75mm，下颌角可去的骨质厚度6.25±0.75mm，枕外隆凸可去的骨质厚度8.47±1.36mm，女性分别为：额结节可去的骨质厚度4.20±1.10mm，眉弓部可去的骨质厚度2.10±0.15mm，颧弓可去的骨质厚度2.14±0.46mm，下颌角可去的骨质厚度5.10±0.45mm，枕外隆凸可去的骨质厚度为6.73±1.10mm。

Chapter 2 has analysized the conversly synthetic means of solanesol and designed novelly synthetic routes of solanesol and key intermediate Chapter 3 has summarized the preparation of trans-3-methyl-4-hydroxy (bromo-2-butenyl oxy methyl benzene In chapter 4 ,a novel technology of important intermediate(all trans-8-bromo geranyl acetate),which is suitable for industrial procedure , was found .meanwhile,an another new way has been invented ,of which the key intermediate (all trans-8-hydroxy geranyl acetate) has been produced.

第二部分分析了茄尼醇的逆合成方法，设计了一条适合于合成茄尼醇的合成路线及其重要中间体的合成路线。第三部分研究了重要中间体[Trans-3-甲基-4-羟基-2-丁烯基乙酰基(苄基，2，3-二氢吡喃基)醚]的合成新方法，找到了一条适合于工业化生产的制备反式-3-甲基-4-羟基-2-丁烯基苄基醚的新方法。第四部分研究了重要中间体[-3，7-二甲基-8-羟基-2，6-辛二烯-1-醇乙酸酯、-3，7-二甲基-8-溴-2，6-辛二烯-1-醇乙酸酯]的合成新方法，找到了一条适合于工业化生产的制备它们的新方法；同时研究了一条制备-3，7-二甲基-8-羟基-2，6-辛二烯-1-醇乙酸酯的另一新方法。

The data byχ~2 were consistent with the separation ratio as 1: 2: 1 χ~2=4.028＜χ_(0.05,2~2=5.99, which further conformed that glandless character was controlled by a incomplete dominance gene, Gl_2~e. 2. SSR markers every about 5cM were selected in the chromosome 12 of our lab genetic linkage map to screen the parent plants. The markers with the polymorphism were used to amplify the DNA of 210 F_2 segregating plants selected randomly and recorded the marker genotypes. After eliminating the segregation distortion markers byχ~2 test, other SSR markers were detected by linkage analysis.

二、参照本实验室海陆种间遗传连锁图谱第12染色体上的SSR标记，平均每5cM左右选择一个标记进行亲本多态性的筛选，筛选出具有多态性的标记位点进一步扩增随机抽取的210个F_2群体单株的DNA，鉴定每个个体的标记基因型。X~2检测剔除偏分离标记后进行连锁分析，发现Gl_2~e基因位于CIR362与NAU5079之间，进一步参考图谱上位于CIR362与NAU5079之间的标记加密图谱，最终将其定位在CIR362和NAU2251b、NAU3860b、STV033之间。

According to the order, the data of Caragana Korshinskii Kom is about 6.07 J/cm~2, 23.67 MPa, and 1787.98 MPa separately, and the data of Vitex is about 11.78 J/cm~2, 48.06 MPa and 3544.36 MPa separately. Additionally, the data of Fourfold Acacia is about 10.09 J/cm~2, 40.78 MPa and 2304.87 MPa , whereas the data of Grewia biloba var.parviflora is about 8.47 J/cm~2, 65.88MPa and 2523.88MPa respectively. The impact toughness four shrubs is in the bound of the data of wood in China, but the compressive strength and compression elastic modulus parallel to grain are some small than those of ordinary wood.

柠条的冲击强度为6.07J/cm~2，顺纹抗压强度为23.67MPa，顺纹抗压弹性模量(来源：AB75C论文网www.abclunwen.com)为1787.98MPa；荆条的冲击强度为11.78J/cm~2，顺纹抗压强度为48.06 MPa，顺纹抗压弹性模量为3544.36MPa；四倍体刺槐冲击强度为10.09 J/cm~2，顺纹抗压强度为40.78 MPa，顺纹抗压弹性模量为2304.87 MPa；扁担木的冲击强度为8.47J/cm~2，顺纹抗压强度为65.88MPa，顺纹抗压弹性模量为2523.88 MPa。

E isoated and obtained a excellent strain of producing 2 - keto - L - gulonic acid -Bdellovibrio J26. The fermentation condition of 2 - keto - L - gulonic acid(2 - KGA) wasstudied extensively. Addition some carbon source or nitrogen source in culture medium canincrease the 2 - KGA yield from 5O - 6Omg/ml to 7O - 76 mg/ml.

对新分离得到的能产生维生素C前体2-酮基-L-古龙酸（2-KGA）的优良菌株蛭弧菌J26，进行了一系列摇瓶发酵条件试验，通过添加一些其它有机碳源或其它氮源，可使蛭弧菌J26摇瓶发酵产生2－KGA由50-60mg／ml上升到70mg／ml以上，采用SMA探针技术的流加发酵摇瓶试验产生2－KGA可以达到83.9－91.7mg／ml。

In Anxi County, food production service values in prohibited grazing region in lowland halophytic meadows and desert grassland increased 16.25 yuan/hm^2 and 7.75 yuan/hm^2, and total values increased by 176.5 yuan/hm^2 and 170.5 yuan/hm^2, respectively.

安西县低地盐生草甸草地禁牧区较非工程区食物生产价值增加了16.25元/hm^2，总价值增加了176.5元/hm^2；温性荒漠类草地禁牧区较非工程区食物生产价值增加了7.75元/hm^2，总价值增加了170.5元/hm^2。

The results indicate that Ca(superscript 2+) and GA3, single or combined application treatments, promote cucumber seed germination treated with P. harmala alkaloid, increase germination rate, germination vigor and index; as well as α-amylase, protease, lipase, isocitratelyase, nicotinamide adenine dinucleotide kinase and Ca(superscript 2+)-ATPase activities; and GA and CaM content in cucumber seeds; but decrease abscisic acid content. The synergistic effects of combined Ca(superscript 2+) and GA3 on increasing GA and decreasing ABA are oberseved compared with Ca(superscript 2+) treatment.

结果表明，Ca(上标 2+)和GA3单一及复合处理可促进骆驼蓬生物碱处理的黄瓜种子的萌发，使黄瓜萌发率、发芽指数和活力指数提高，萌发种子的α-淀粉酶、蛋白酶、脂肪酶和异柠檬酸裂解酶活性及赤霉素和钙调素含量增加，烟酰胺腺嘌呤二核苷酸激酶和Ca(上标 2+)-ATP酶活性增强，脱落酸含量降低；且Ca(上标 2+)和GA3复合处理对GA含量的提高和ABA含量的降低与Ca(上标 2+)单一处理比较呈显著的加成作用。

Our results suggested that the channel contains two of each subunit and the stoichiometry is apt to 2:2 if hetermeric ASIC channel is a tetramer,while the assembly of ASICs is random,the stoichiometry is not fixed(2:1 and 1:2 coexist)if hetermeric ASIC channel is a trimer.This study provided interesting new data supporting the occurrence of the homomeric and heteromeric assembly of ASICs.

另外，我们还对ASIC异聚体的分子比情况进行了初步的探讨，结果发现如果所形成的ASICs异聚体通道是四聚体，那么每种亚单位有两个，分子比倾向于2∶2；如果是三聚体，则提示ASICs的装配是随意的，分子比是不固定的，2∶1和1∶2这两种情况都存在。

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