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First, a chlorinator was self-designed in this paper, and dichloride of 2-methyl-1-propene was synthesized by 2-methyl-1-propene reacted with chlorine fast in this reactor. By means of the Orthogonal Experiments design and single factor experiments, the influence of several reaction variables on the yield were examined and the optimum reaction conditions under the intervallic operation were obtained, the yield and selectivity of dichloride of 2-methyl-1-prop-ene were more than 65% and 80% respectively. Second, the preparation of 2-methylene-1, 3-propanediol, which dichloride of 2-methyl-1-propene reacted with alkali was investigated. By means of the Orthogonal Experiments design and single factor experiments, the influence of several reaction variables on the yield were examined and the optimum reaction conditions under the intervallic operation were obtained, the conversion of dichloride of 2-methyl-1-propene was 100%. Moreover the preparation of MPO, which 2-methylene-1, 3-propanediol reacted with hydrogen, in presence of Al_2O_3-Pd catalyst, was gotten, and the product was appraised.

本文在氯化反应过程中，自行设计制作出了氯化管式反应器，在该反应器中异丁烯和氯气迅速混合反应生成二氯异丁烯，根据该氯化反应特征利用正交试验和单因素试验考察了有关因素的影响并优化得到了最佳工艺条件，二氯异丁烯的总收率达65％以上，选择性达80％；接着，对二氯异丁烯进行水解反应制得了2-甲烯-1，3-丙二醇，讨论了相关因素对水解反应的影响，并通过正交试验和单因素试验得到了较佳工艺条件，二氯异丁烯的转化率达100％；同时还对制备的2-甲烯-1，3-丙二醇在常压下采用三氧化二铝负载钯催化剂催化加氢得目的产物MPO，并对产品进行了鉴定，从而打通了整个工艺路线。

The average heterosis of spike number per plant and 1 000-grain-weight were high and obviously related to yield heterosis at 0. 01 and 0. 05 level, respectively; the average yield heterosis of F1 hybrids between common wheat and club wheat was 77. 19%(ranged from-2. 18% to 143. 42%), the average heterosis of spike number per plant and spike grain number were high and both was also obviously related to yield heterosis at 0. 01 level.

结果发现：小麦种间杂种在产量上具有明显的杂种优势，其中斯卑尔脱小麦与普通小麦所配的30个种间杂交组合产量杂种优势平均为109.24%(43.14%～187.96%)，单株穗数及千粒重平均优势较大且与产量优势的相关分别达极显著水平和显著水平；密穗小麦与普通小麦所配的30个种间杂种的杂种优势为77.19%(-2.18%～143.42%)，单株穗数和主穗粒数优势较大且与产量优势的相关均达极显著水平。

The result of ways of enzyme is thatγ-amylase had no impact on diosgein yield and draff yield.The ways of bathing did not work on diosgenin yield.

原料酸水解液用石灰水先中和后再水洗的方法与直接水洗对薯蓣皂甙元得率没有显著影响。

Results and Discussion Flavin 2 was synthesized from 3,4-diaminobenzoic acid (3) and alloxane monohydrate (4) in good yield according to standard procedures (Scheme 1).9 The first step afforded flavin 5 in quantitative yield, in 1:1 ratio of the 7- and 8-hydroxycarbonyl regioisomers, and was subsequently methylated by methyl iodide to form flavin 6 in 86% yield, in a 3:2 ratio of the 7- and 8-regioisomers.

结果与讨论黄素二是合成3，4 -二氨基安息香的酸（ 3 ）和氧嘧啶水合物（ 4 ）在良好的收益率根据标准程序（计划1） 0.9的第一步，给予黄素五，在定量产量，在1：1的比例， 7 -8 -羟基羰基 regioisomers ，并随后甲基甲基碘形成黄素6月在86 ％的产量，在一个3：2的比例， 7 -和8 regioisomers 。

Teflubenzuron was synthesized from 2,4-difluoronitrobenzene and 2,6-dichlobenil as starting reagent through six-step reaction with the yield of 75.3%.3,5-Dichloro-2,4-difluoroaniline was synthesized by chlorination,reduction reaction from 2,4-difluoronitrobenzene,the yield was 84.5%;2,6-difluorobenzamide with the yield of 87.7% was synthesized by fluoridation and hydrolysis from 2,6-dichlobenil.

以2，4-二氟硝基苯和2，6-二氯苯腈为起始原料，经过6步反应合成伏虫隆，总收率为75.3%。以2，4-二氟硝基苯为原料，经过氯化、还原反应合成3，5-二氯-2，4-二氟苯胺，产率为84.5%；以2，6-二氯苯腈为原料，经过氟化和水解，制得2，6-二氟苯甲酰胺，产率为87.7%；将Ⅱ与二碳酸酯酰化，合成2，6-二氟苯甲酰异氰酸酯，产率为91.3%；Ⅲ与Ⅰ加成，得到杀虫剂伏虫隆，产率为95%。

We believe that it is extremely difficult for export volume to account for 10% of domestic gross yield, and almost impossible to reach 20%, let alone the estimation from foreign experts that Chinese apple yield may reach 34 million t in 2010. According to the calculation, 10% yield accounts for 55% of world export.

我们认为，出口量达到国内总产量的10%是极其困难的，达到总产量20%几乎不可能发生，更何况国外专家估计，2010年中国苹果产量可能达到3400万 t[1]，以此计算，10%的产量已占世界出口量的55%。

About structure system without obvious yield point, we determine its ductile coefficient by adopting the method of simulation yield process, at the same time, parameter p, parameter εand imaginary yield point elongation are present and applied into resistant earthquake engineering design.

提出了对于没有明显屈服点△y的结构体系，可以采用模拟屈服过程法确定其延性系数和p、ε假想"屈服平台"的概念，并且尝试应用于工程设计中。

The ethanol yield after steam pretreatment of the lespedeza stalks at 210 ℃ was 59.3 %,72.8 % and 62.2 % of theoretical yield when the residence time was 2, 4 and 6 min, respectively, whereas the highest yields from α cellulose were 92.7 % of theoretical yield.

其乙醇的产率分别是理论产率的59.3 %，72.8 %和62.2 %(未爆破处理的胡枝子茎杆乙醇产率为理论产率的16.4 %)。

It showed the 200g planting density had better agronomic traits and higher yield than others. Resides comparison of cropping yield in three different transplant quantities, in first-crop paddy rice, the highest yield is Three, second-crop is Multeity.

结果显示四种播种密度之稻谷产量，以200g播种密度之稻谷产量显著高於其他三者，一、二期作皆然；不同移植本数之稻谷产量，一期作以三本植处理之稻谷产量为最高，二期作则以多本植之稻谷产量为最高。

The results show that the organic-inorganic specialty fertilizer 〔16-6-8-20 〕is favorite to the yield increase and nitrate content decrease against tumorous stem mustard, and the inorganic fertilizer type Ⅱ(19-7-9) follows. Single superphosphate is better than monoammonium phosphate in increasing the yield whilst poorer in decreasing its nitrate content,sulfate of potash is better than muriate of potash in increasing the yield while weaker in decreasing its nitrate content,and fused calcium magnesium phosphate shows little desired effects.

结果表明：有机无机型专用肥〔16-6-8-20〕对茎瘤芥增产和降低其硝酸盐含量的作用最佳，其次为无机型专用肥Ⅱ(19-7-9)，过磷酸钙对茎瘤芥增产效果优于磷酸一铵，但降低其硝酸盐含量不及磷酸一铵，硫酸钾的增产作用优于氯化钾，但氯化钾降低硝酸盐含量的效果较好，钙镁磷肥对其增产和降低硝酸盐含量的效果均差。

Salt is good, but if the salt becomes flat and tasteless, with what do you season it?

14：33 盐本是好的，盐若失了味，可用什么叫它再咸呢？

He reiterated that the PLA is an army of the people under the leadership of the Communist Party of China.

他重申，人民解放军是在中国共产党领导下的人民军队。