合成物质

The effect of impurities in DMDAAC monomer solution, such as NaCl, allyl chloride, allyl alcohol, allyl aldehyde, active carbon, low molecular polymer of DMDAAC, yellow residua, Fe~(3+), Fe~(2+), Cu~(2+), on the polymerization reactivity of preparing PDA with 30％cationicty was researched in this paper.

本文研究了二甲基二烯丙基氯化铵单体溶液中氯化钠、烯丙基氯、烯丙醇、烯丙醛、活性炭、低分子聚合物、黄色物质、Fe~(3+)、Fe~(2+)、Cu~(2+)等杂质对合成阳离子度为30％PDA的聚合反应性能的影响。

Through chemical mimicry that has evolved through specific focus on one host, the cuckoo wasp has synthesised a chemical cloak that conceals all signs of her presence on the beewolf's turf.

通过化学模仿已通过具体的重点发展在一台主机，杜鹃蜂合成的化学物质外衣，但所有迹象掩盖她对beewolf的草皮存在。

Synthetic progresses of the sorbitol acetals in process routes, the molar ratios of aldehyde to sorbitol, the reaction temperature, the types and the amount of acid catalysts, the types of acromatic aldehyde, reaction solvents and purification methods of products were reviewed at domestic and aboard with 46 references.

讨论了缩醛反应机理。从反应工艺路线、反应物醛与醇物质的量比、反应温度、酸催化剂的种类和用量、芳香醛的种类、反应溶剂及产物的纯化方法等方面全面综述了国内外山梨醇缩醛类成核剂合成研究进展。

Allosteric control enables the cell to regulate needed substances rapidly.

变构调控使细胞能迅速地调节所需物质的合成。

Extreme pressure opens fertile ground for the formation of novel materials, as evidenced by the new phase transitions, new superconductors, new chemical bondings, and ultimately the new Periodic Table, one which has the same elements but drastically altered chemical reactivities and physical behaviors.

极端高压条件下可以合成各种奇异的新物质，例如新的相变过程、新的超导体、新的化学键合，甚至新的元素周期表，因为同一种元素在极端高压下的化学反应和物理性质将完全不同。

The influence factors such as amount of catalyst,molar ratio of maleic anhydride to n-butanol,and reaction time on the yield of dibutyl maleate were discussed.

以La2(SO4)3/SiO2为催化剂，顺丁烯二酸酐和丁醇为原料，合成内增塑剂顺丁烯二酸二丁酯，探讨了催化剂用量，酐醇物质的量比以及反应时间等对收率的影响。

After cropping, use of additives or synthetic chemical substances is not allowed for the processing of organic agricultural products, nor is radiation or use of fumigants allowed.

有机农产品收获后处理不允许添加或使用合成化学物质，也不允许以辐射或熏蒸剂处理。

According to depositions of nanostructured silica in plants and chemically synthesized nanostructured silica sprayed into leaves and physical properties of leaf conferred by silica depositions as well, the first step reaction of high-specific supramolecular recognition process of fungi spores and host surfaces is discussed. Nanostructured silica can alter leaf physical properties including topography and hydrophobicity and affect extracellular matrix release and formations of germ tube, appressorium and penetration peg.

初步揭示了纳米结构SiO〓与植物真菌病害发生的关系：从化学合成的纳米结构SiO〓在叶表的沉积以及沉积之后赋予植物叶片独特的物理学特性入手，详细研究了纳米结构SiO〓抑止真菌孢子和寄主表面的高度专一性的超分子识别过程的第一步反应，从而提出纳米结构SiO〓可能改变植物叶表面原有的拓扑结构和疏水等物理学特性，即形成特殊的双亲性表面，影响真菌胞外物质的释放和芽管、附着胞及侵染钉的形成，阻断真菌孢子早期的侵染过程，从而确定靶向的真菌病害的控制措施。

The results of vibrio phagocytosis assay indicated that two kinds of granulocytes have obvious phagocytotic ability while two kinds of hyalinocytes do not. It implies that two kinds of granulocytes are key haemocytes in Octopus ocellatus to carrying out cell immunity. Two kinds of granulocytes not only relate with active synthesis and secretion of certain kind of materials, but also participate directly in phagocytosis and elimination of foreign pathogens.

弧菌吞噬实验结果表明，两类透明细胞均没有弧菌吞噬活性，两类颗粒细胞均具有弧菌吞噬活性，暗示这两种颗粒细胞很可能是短蛸发挥细胞免疫功能的关键性细胞，不仅与某些物质的活跃合成与分泌有关，而且可能还直接参与了外来病原的吞噬及清除。

Because of the harmful effects of the synthetic halocarbon refrigerants on environment, carbon dioxide becomes a better refrigerant as it is natural substance.

由于氟里昂作为人工合成物对自然环境具有负面影响，二氧化碳作为一种自然物质，成为较为理想的制冷剂。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！