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Benzyl phenylacetate was synthesized by benzyl chloride with the salt prepared by phenylacetic acid and Na2CO3 under microwave irradiation and in presence of phase transfer catalyst without any organic solvent and inorganic carrier.

采用微波辐射相转移催化技术,以四丁基溴化铵为相转移催化剂,先将苯乙酸与碳酸钠成盐,在无有机溶剂和无机载体的条件下与氯化苄直接酯化合成苯乙酸苄酯。

The correlation of such ultrafast process with the system temperature and property of solvents is analyzed, which is useful for the further study about the ultrafast process of DNA, protein and other biological molecules, such as intra- and intermolecular electron, proton and energy transfer and photoisomerization.

本文的主要内容是利用飞秒时间分辨荧光亏蚀光谱探测技术对液相体系中的染料大分子在不同条件下的激发态振动弛豫、取向弛豫和分子间碰撞传能等超快动力学过程进行了研究,分析得到了这些超快过程与体系温度和溶剂性质之间的关系,同时为进一步研究DNA、蛋白质等生物分子体系的电子转移、质子转移、能量传递以及光致异构化等反应过程打下了基础。

Femtosecond time-resolved studies using fluorescence depletion spectroscopy were performed on the vibrational relaxation; orientational relaxation and the intermolecular energy transfer of dye molecules in solutions under different conditions. The correlation of such ultrafast process with the system temperature and property of solvents is analyzed, which is useful for the further study about the ultrafast process of DNA, protein and other biological molecules, such as intra- and intermolecular electron, proton and energy transfer and photoisomerization.

本文的主要内容是利用飞秒时间分辨荧光亏蚀光谱探测技术对液相体系中的染料大分子在不同条件下的激发态振动弛豫、取向弛豫和分子间碰撞传能等超快动力学过程进行了研究,分析得到了这些超快过程与体系温度和溶剂性质之间的关系,同时为进一步研究DNA、蛋白质等生物分子体系的电子转移、质子转移、能量传递以及光致异构化等反应过程打下了基础。

Simultaneously we prepared benzimidazolines with two methods by the reducton of benzimidazolium salts with NaBH_4 and Grignard addition with benzimidazolium salts. Thus we provided a new biomimic synthetic method for 9 kind of tetrahydro-β-carboline starting from carboxylic aicd and halid. A convenient synthetic method for preparing tetrahydro-β-carboline was provided.

本文以1,3-二甲基苯并咪唑碘盐和2-取代的1,3-二甲基苯并咪唑碘盐为原料,采用了NaBH_4还原和Grignard试剂加成两种方法,制备了9种1,3-二甲基苯并咪唑烷和2-取代的1,3-二甲基苯并咪唑烷作为四氢叶酸辅酶一碳单元转移新模型,在酸性条件下,以色胺作为接受一碳转移的亲核试剂,完成9种四氢-β-咔啉类化合物的新合成方法研究。

The influence of the factors concerning temperature, reaction time, the kind and amount of catalyst, the amount of transmethylation agent and the amount of solvent on the yield of 2,6-DMN was investigated, and the conditions of synthesizing 2,6-DMN based on the transmethylation method were explored.

通过考察温度、反应时间、催化剂的种类及用量、转移甲基化试剂的用量、溶剂用量等因素时2,6-DMN收率的影响,探讨了转移甲基化法合成2,6-DMN的工艺条件。

Simultaneously we prepared benzimidazolines with two methods by the of reduction benzimidazolium salts with NaBH_4 and Grignard addition with benzimidazolium salts. Thus we provided a new biomimic synthetic method for 13 kind of tetrahydroisoquinoline starting from carboxylic aicd and halid, gave a new idea of the synthesis for new drugs.It can make many kind ofβ-carboline alkaloids which have bioactivity to antibacterium, antivirus and antitumor to start from 1,2,3,4-tetrahydro -β-carboline.

本文以1,3-二甲基苯并咪唑碘盐和2-取代的1,3-二甲基苯并咪唑碘盐为原料,采用了NaBH_4还原和Grignard试剂加成两种方法,制备了13种1,3-二甲基苯并咪唑烷和2-取代的1,3-二甲基苯并咪唑烷作为四氢叶酸辅酶一碳单元转移新模型,在酸性条件下,以2-(3,4-二甲氧基苯基)乙胺作为接收一碳转移的亲核试剂,完成了13种重要的四氢异喹啉类化合物的新合成方法研究。

Will play their own advantages and market credibility platform advantages in carrying out technology transfer business, to focus on transaction information disclosure, trading organizations, accounting for safety, play organization, coordination and gatekeepers At the same time enabling the use of their own resources, provide better services for technology transfer transactions.

北交所将发挥自身的平台优势以及市场公信力优势,在开展技术转移业务时,专注于交易信息披露、交易组织、核算安全方面,发挥组织、协调和把关作用,同时利用自身有利资源条件,更好地提供技术转移交易服务。

Summary:It is the inevitable trend of the industrialization and modernization that rich remaining labor force of village transfer toward the non- farm production industry and town, is the key that the village industrializes to turn with city.

农村剩余劳动力是在一定的生产条件下,农村劳动力供给超需求的那一部分劳动力,其边际生产率为零。农村剩余劳动力转移是指农业领域的劳动力向非农业领域的转移,是农村剩余劳动力向种植业以外的产业的流动和再就业。

The implementation contract international petrification industry shift, must use and Taiwan specially "five reasons" the advantage, aims at the Taiwanese businessman to petrify the industrial shift middle and lower reaches, in the east Wu chemical industry garden area introduction large-scale petrification project, the display industry "the cybotaxis effect", in the east high peaked mountains industry piece area, the maple tree pavilion industrial district and north Gao Kengyuan the industry plot introduction petrifies the project, forms on middle and lower reaches mutually necessary, the coordinated development, has the strong region competitive advantage petrified industry colony.

实施承接国际石化产业转移,特别要利用与台湾&五缘&有利条件,瞄准台商石化产业转移,在东吴化工园区引进大型石化项目,发挥产业&群聚效应&,在东峤工业片区、枫亭工业区和北高坑园工业小区引进石化中下游项目,形成上中下游相互配套、协调发展、具有较强区域竞争优势的石化产业集群。

The preparative technique of solid lubricant is cold-press sintering method.The micro-structure , friction surface, lubricant transfer film surface of base material was characterized by SEM; XRD was used to do phase analysis. The degrees of crystallinity of pure PTFE under the different conditions of water cooling, air cooling and furnace-varying cooling were made comparison by XRD. The thermal stability of pure PTFE and solid lubricant was analyzed by DSC-TG; The composition and valence state of elements in the surface of carbon fiber ,solid lubricant before and after friction test and lubricant transfer film were characterized by XPS; The frictional property of solid lubricant was tested by pin and disk test rig .

用SEM表征原料微观结构、摩擦表面及润滑转移膜表面形貌:用XRD进行原料物相分析,及比较水冷却、空气冷却、随炉冷却三种工艺条件下的纯聚四氟乙烯树脂的结晶度;用DSC-TG分析纯聚四氟乙烯树脂及固体润滑剂的热稳定性;用XPS表征碳纤维表面、固体润滑剂摩擦前后表面、润滑转移膜表面的元素组成、价态变化;用销盘式摩擦磨损试验机对固体润滑剂进行摩擦性能测试;采用专用的台架模拟试验机对固体润滑剂镶嵌轴承套与钢轴摩擦副间的摩擦磨损性能进行测定;用莱次偏光显微镜测试固体润滑剂的硬度;用材料试验机测试固体润滑剂的抗压强度等。

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推荐网络例句

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克,果实色泽鲜艳,汁多味浓,甜酸适口,离核仁甜,清末时就驰名陕、甘两省,清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异:红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感,ED90值分别为47.65、71.67和29.17g/hm2;春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感,ED90值分别为96.91、114.20g/hm2;而番茄不敏感。

However, I have an idea.

不过,我有个主意。