乙烯型的

Emphasis was placed on CB-polymer interaction adjustment in order to control dispersion of carbon black aggregates in polymer matrix and obtain technical data for designing and manufacturing PTC products of practical values.

本论文在中山大学材料科学研究所有关工作的基础上，着重从聚合物基PTC材料的组成和加工工艺的角度，以炭黑填充单一低密度聚乙烯为参照体系，通过调节炭黑-聚合物基体之间的界面相互作用、控制炭黑的分散程度与分布状态，进而研究炭黑填充低密度聚乙烯/乙烯-乙酸乙烯酯共混物基PTC型复合材料，力图改善上述不足，为更好地了解这类PTC材料的结构-加工-性能之间的关系，设计和制造具有实际应用价值的PTC制品提供科学依据。

The result showed that, the effect of the synergistic reaction of alkyl-phenol-polyoxythylene ether phosphate dispersant TERSPERSE 4896, nonyl phenyl polyoxyethylene ether dispersant TERSPERSE 2210 and XG to suspension was different. Both the rheological curves were same presented as pseudoplastic fluid when they stored in R. T (18~25℃) for 10 days, but the rheological curve of suspension with the synergistic reaction of TERSPERSE 2210 and XG was changed to dilatant fluid when it stored in R.

结果表明，烷基酚聚氧乙烯磷酸酯类分散剂TERSPERSE 4896、壬基酚聚氧乙烯醚类分散剂TERSPERSE 2210与增粘剂黄原胶协同使用所得悬浮体系，室温(18~25℃)贮存10d仍表现出二者共同的流变特性，呈假塑性的流变曲线；但室温贮存150d后，含TERSPERSE 2210与黄原胶的悬浮体系的流变性质发生了明显变化，由假塑性流体向膨胀型流体转变。

The processing of glass-reinforced plastic cover for Model 16 Hooker electrolyzer with vinyl ester based unsaturated polyester resin was introduced.

叙述了用乙烯基酯不饱和聚酯树脂制作虎克－16型玻璃钢电解槽盖的施工方法，介绍了乙烯基酯不饱和聚酯树脂的性能。

Methods Twenty fresh pig hearts,perfusing with perchloroethylene ethyl acetate plastics filler locally,to show the stracture and the ramust of the left and right coronary artery and solid structure of the artioventricular artery sufficiently.

方法新鲜猪心20例，用过氯乙烯-乙酸乙酯填充剂灌注，制作心脏动脉铸型和局部房室结动脉铸型，充分显示左右冠状动脉及其细小分支和房室结动脉的立体构筑。

objective to determine the contents of residual acetone in acetoacetic ester,the raw material for the synthesis of edaravone, by gas chromatography.methods sample solution was injected on a gdx column (0.18 mm～0.25 mm) with nitrogen as the carrier gas.the residue was calculated by the external standard method.results the linearity was good over the range of 25 μg/ml～400 μg/ml,with the correlation coefficient of acetone being 0.996 and the average recovery 96.8%.conclusions the method was proved to be simple,rapid,practical and highly sensitive.it is an efficient method for the quality control of acetoacetic ester.

摘要］ 目的：用气相色谱法测定依达拉奉合成起始原料乙酰乙酸乙酯中丙酮的残留量。方法：采用固定相为二乙烯苯乙基乙烯苯型高分子多孔小球（直径为0.18 mm～0.25 mm），氮气为载气，用外标法测定乙酰乙酸乙酯中残留丙酮的含量。结果：该方法在丙酮浓度范围在25 μg/ml～400 μg/ml内呈良好的线性关系，响应曲线相关系数为0.996，平均回收率为96.8%。结论：本法简便，快速、实用，灵敏度高，可有效地用于乙酰乙酸乙酯的质量控制。

Objective To determine the contents of residual acetone in acetoacetic ester,the raw material for the synthesis of Edaravone, by gas chromatography.Methods Sample solution was injected on a GDX column (0.18 mm～0.25 mm) with nitrogen as the carrier gas.The residue was calculated by the external standard method.

摘要］ 目的：用气相色谱法测定依达拉奉合成起始原料乙酰乙酸乙酯中丙酮的残留量方法：采用固定相二乙烯苯乙基乙烯苯型高分子孔小球（直径为0.18 mm～0.25 mm），氮气为载气，用外标法测定乙酰乙酸乙酯中残留丙酮的含量。

The amphoteric fatliquor of N-amidel- polyethylene polyamine -β-aminopropionic acid types has been synthesized by nature oil and fat reaction with polyethylene polyamine and acrylic acid .

用天然油脂、多乙烯多胺和丙烯酸合成制得N -酰胺基多乙烯多胺-β-氨基丙酸型两性加脂剂，最佳合成条件分两步的反应温度分别控制在 10 0℃及 12 0℃、两步反应时间分别为 2h和 4h ，天然油脂与多乙烯多胺及丙烯酸的物质量的比为 1：0 。

The effect of zeolites ion-exchanged by transition metals on thermal catalytic cracking reaction is studied. The product distributions of the cracking reactions catalyzed by theβor ZSM-5 zeolites exchanged with transition metals are different from that catalyzed by corresponding Hzeolites, which means the mechanism of cracking reactions has varied. Group Ⅷ metals Fe, Co, Ni and Cu, Zn are shown to be of strong catalytic activity of oxidative dehydrogenation, while Ti and Cr are not of oxidative activity. Catalyzed by zeolites or catalyst containing Ag, conversion of thermal catalytic cracking reactions and the yield of ethylene increase while the yield of propylene does not decrease. Silver can not only promote the formation of carbonium ion, but also convert carbonium ion into free-radical via redox reaction. The weak adsorption of olefins on silver reduces the occurrence of hydrogen transfer and dehydrogenation. As a result, the yield of light olefins is favored by silver in the catalyst.

采用过渡金属交换的分子筛作为催化剂，进行催化热裂解制取乙烯的反应，研究发现，在β沸石分子筛和ZSM-5分子筛中引入过渡金属后，催化热裂解反应的产物分布与相应的氢型分子筛相比有了较大的变化，说明过渡金属的加入对于催化热裂解反应的机理具有影响，Ⅷ族金属如Fe、Co、Ni和第Ⅰ、Ⅱ副族Cu、Zn表现出较强的氧化脱氢活性，产物中氢气、焦炭的产率很高，Ti、Cr则未表现出氧化作用：分子筛及催化剂中引入银后，催化热裂解反应的转化率和乙烯的产率有了提高，丙烯产率没有很大的变化，说明银在催化热裂解反应中能够促进正碳离子的生成，又有可能通过氧化-还原作用部分改变反应机理，促进了自由基的生成，并且由于银对烯烃的吸附很弱，其氢转移反应和脱氢、加氢活性比较低，有利于烯烃产率的提高。

The gene has smaller homology with these ACC synthase genes expressed by other inductions.

由于CS-ACSG基因与乙烯的形成有关，因此比较了不同性别表型黄瓜各品种内源乙烯释放和EFE活性的差异，结果表明：CS-ACSG基因与雌性系黄瓜的内源乙烯释放及EFE活性之间并不存在着直接的联系。

Main physiological and biochemical parameters were studied in different mature stage and during ripening and senescence of tomato and strawberry fruits at pink stage after harvest under low and normal temperature.

中文题名Ca2+、CaM及其目标酶与乙烯诱导番茄和草莓果实成熟衰老关系的研究副题名外文题名 Studies of relationship between Ca2+，CaM，its target enzymes and ethylene inducing maturation，ripening and senescence of tomato and strawberry fruits 论文作者顾采琴导师席玙芳李广敏学科专业食品科学研究领域\研究方向学位级别博士学位授予单位浙江大学学位授予日期2003 论文页码总数117页关键词果实植物生理学番茄草莓乙烯馆藏号BSLW /2003 /Q945 /34 研究了跃变型果实番茄和非跃型果实草莓不同成熟度以及粉红期两种果实采后置于低温和常温下后熟衰老过程中与成熟衰老有关的主要生理生化指标的变化。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。