化
- 与 化 相关的网络例句 [注:此内容来源于网络,仅供参考]
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The approach of Visual DSS is formulated in the article, fully considering the shortcoming of traditional DSS, which visualizes the information of resources and environment, model - building, method -solving, plan - choosing and business result etc. The visual DSS increases the confidence of decision - maker through three - steps: Assistance, Intelligence, and Visuality.
针对传统决策支持系统存在的弊端,提出了可视化决策支持系统的思想,使系统中的资源与环境信息可视化、模型建立可视化、求解方法可视化、方案评价选择可视化、效益成果可视化等,使决策支持系统由辅助——智能——可视化,以提高使用者选择决策的信心及决策的效果。
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Tetrachloroterephthalic acid was prepared by chlorinating terephthalic acid, oleumsolvent and iodine catalyst. Tetrachloroterephthalic acid was acylated by sulphurous oxychloride in the presence of DMF to form tetrachloroterephthaloyl chloride. The acyl chloride product was fluorinated by potassium fluoride and esterified by methanol to synthesize dimethyl tetrafluoroterephthalate. The ester was reduced with potassium borohydride and lithium chloride to give tetrafluoroterephthalyl alcohol. The above product was bromated in the hydrobromic acid to obtain 4-bromomethyl-2,3,5,6-tetrafluoro-benzene methanol. 4-Methyl-2,3,5,-6-tetrafluorobenzene ethanol was obtained by reducing the bromide with magnesium. In the exist of DCC and DMAP, tefluthrin was got by the condensation reaction between 4-methyl-2,3,5,6-tetrafluoro-benzene methanol and-(1RS,3RS)- 3-(2- chloro-3,3,3-trifluoro-1-propenyl)-2,2-dimethyl cycolpropanecar-boxylate acid.
对苯二甲酸与氯气在碘存在下以发烟硫酸为溶剂进行氯化制备四氯对苯二甲酸;再以DMF为催化剂与二氯亚砜反应生成四氯对苯二甲酰氯;以氟化钾为氟化剂,环丁砜为溶剂置换氟化,再与甲醇酯化得到四氟对苯二甲酸甲酯;以KBH4-LiCl为还原剂二甲醚为溶剂反应制得四氟对苯二甲基苄醇;以氯苯为溶剂在溴化氢溶液中溴化得到溴化产物;在乙醇溶液中经镁粉还原得到4-甲基-2,3,5,6-四氟苄醇;甲基苄醇与功夫酸在催化剂二环己基碳二亚胺和4-二甲氨基吡啶作用下缩合得到七氟菊酯,总收率达43.6%。
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In this article, high DS and low viscosity carboxymethyl starch was prepared in aqueous media through the reaction between corn starch with acid treatment and etherifying agent, the effect of acid treatment time, liquor/material ratio, the amount of sodium hydroxide, the amount of monochloroacetic acid, etherification time, and reaction tempera.
以玉米淀粉为原料,采用酸化-醚化复合变性的方法在水相中制备高取代度低黏度羧甲基淀粉,探讨了酸化时间、液固比、NaOH用量、ClCH2COOH用量、醚化反应时间、反应温度对羧甲基化过程的影响,研究发现,对原淀粉进行酸化,可以在不增加其它反应试剂用量的基础上提高产物的取代度,但是酸化时间不应过长。
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The discussions which the study investigated were chicken and pork meat processing for elders via different tender mode. In this study, we want to evaluate the nutritions of elders and focus on animal protein. The experiment was injected marination with CaCl2, NaHCO3 and enzyme on pork and chicken meat quality traits. Treatment on the meat was analyzed proximent quality and textural properties by response surface stepwise regression. The best tender method was discovered the elder's sensory evaluation of different tender mode and observed degradation of myoglobulin by muscle tissue slice and SDS-PAGE (10%). The function of sous-vide cooking collocated with tenderization that was evaluated by textural properties and sensory evaluation. It looks for discussion about meat processing for elders.
中文摘要本试验目的在利用市售禽畜肉为原料,针对高龄者之营养需求,分别使用氯化钙、碳酸氢钠与嫩化酵素等常见之嫩化方式对禽畜肉进行嫩化处理,搭配反应曲面法分析一般特性与物性测定,并进行高龄者品评测试以探讨不同嫩化方式之口感影响以求得不同禽畜肉之最佳嫩化处理,并以肌纤维组织切片与电泳分析观察肌肉蛋白质之分解现象,最后利用真空调理法搭配嫩化处理并分析物性测定与品评测试,评估真空调理法增进嫩化之效果,探讨禽畜肉开发为适合高龄者之加工产物模式。
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Seven of them have not been reported.Their structures were confirmed by IR,~1HNMR,MS,and element analysis. 4.Meanwhile,the green methylation procedure of imides was developed by using dimethyl carbonate as methylation reagent.A series of imides,for example,phthalimide,3,4-dibromo-maleimide and succincide were used for substrates.The effects of DABCO(1,4-diazabicyclo [2.2.2]octane)and DBU(1,8-diazabicyclo[5.4.0]undec-7-ene)as a catalyst in this kind of reactions were investigated.2-Bromo-3-(1-methylindolyl-3-yl)-1-methyl-1H-pyrrole-2,5-dione was prepared by using dimethyl carbonate,which further expanded the use of dimethyl carbonate,as a green agent in organic synthesis.
在以硫酸二甲酯为甲基化试剂对3,4-二溴马来酰亚胺进行N-甲基化反应合成3,4-二溴-N-甲基马来酰亚胺的同时,以碳酸二甲酯为甲基化试剂,对3,4-二溴马来酰亚胺、邻苯二甲酰亚胺、琥珀酰亚胺等酰亚胺类化合物的N-甲基化反应进行了研究;考察了1,4-二氮杂双环[2.2.2]辛烷,1,8-二氮杂双环[5.4.0]十一碳-7-烯、碳酸钾和四丁基溴化铵等作为催化剂对碳酸二甲酯N-甲基化反应的反应时间和收率等的影响,并应用碳酸二甲酯为甲基化试剂,合成了N-甲基-3-溴-4-(1-甲基-吲哚-3)-马来酰亚胺。
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In this paper, the phenomenon of abnormal nodularizing or unsucceeded globing in nodular iron product was introduced, and the cause was also analyzed.
对球铁生产中出现的球化不良或球化不成现象,分析了产生的原因,借鉴日本铸造学者张博、明智清等在《球墨铸铁》中的防止球化衰退的&二次球化&,经过生产实践,摸索出了用&补充球化&法来挽救球化不良或球化不成的铁水,取得了较好的效果。
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From the conception of capitalization operation of intangible assets, including the definition, main characteristic and ways of working, the importance of capitalization operation of intangible assets is clarified. I explain questions on capitalization operation of intangible assets, which are financing and external investment. Attention is paid on absorption of venture investment, absorption of foreign investment, the expansion through a low cost and hypothecated loan for financing by intangible assets. As for external investment with intangible assets, explanations are given to purchasing and merging between enterprises with a low cost using intangible assets and intangible assets taking part in distribution. At last, the development of capitalization operation of intangible assets in the world, in our country is explained. After I give my points on the difficulties of capitalization operation of intangible assets in our country, the solutions are concluded.
本文从无形资产资本化运营的界定谈起,对无形资产资本化运营的涵义、主要特征及主要方式进行阐述,论述了无形资产资本化运营的重要意义;然后从无形资产融资、无形资产对外投资方面探讨了无形资产资本化运营问题,其中:对无形资产融资问题,根据融资方式的不同探讨了四方面的内容:利用无形资产吸纳风险投资、利用无形资产嫁接改造吸纳外商资金、利用特许经营实现低成本扩张和利用无形资产质押贷款;在无形资产对外投资问题中探讨了企业以无形资产实施低成本购并及无形资产参与分配问题;最后在综观国际上无形资产资本化运营发展的状况,及展望世界无形资产资本化运营发展趋势的基础上,立足于我国的发展现状,针对目前存在的主要问题,提出我国的无形资产资本化运营对策。
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The present invention relates to an ultraviolet detector and manufacture method thereof, in which a buffer layer is formed on a baseplate and a P-type GaN layer is formed on the baseplate by using epitaxial method. By availing ion-distribution-and-vegetation technology, a first N-type GaN layer is vegetated and invested in the P-type GaN layer by distributing and vegetating Si.sup.+ ions in that layer, and a second N-type GaN layer having a thicker ion concentration is invested in the N-type GaN layer.
专利简介本发明系关於一种紫外光检测器及制程方法,其主要系在一基板上形成一缓冲层,利用磊晶法在缓冲层上形成一P型氮化镓系层,并接著以离子布植技术将Si+离子适当地布植於该P型氮化镓系层中,形成一N型氮化镓系层及包覆在此N型氮化镓系层中且布植浓度更高的另一N型氮化镓系层,最后在该P型氮化镓系层及第二N型氮化镓系层上分别镀上一环状金属层及另一金属层,以作为欧姆接触层。
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The classification of acidification indices about the tested the litchi orchard soil: the first class was soil intensity index of exchangeable aciditypH(KCl, exchangeable acidity, exchangeable aluminium, titratable acidity, actual acidification velocity , cation exchange capacity or electrical conductivity; the second class was soil exchangeable Ca2+, total base or base saturation percentage; The third class was soil intensity index of active aciditypH
采用第一类酸化指标,pH2.5的酸雨淋溶引起了供试土壤的酸化;采用第二类酸化指标,除pH2.5的酸雨淋溶引起了供试土壤的酸化外,pH3.5的酸雨淋溶引起了供试土壤的表层土壤酸化;采用第三类酸化指标,pH≤4.5酸雨淋溶引起了供试土壤不同程度的酸化。
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The recent research progress of oxidation carbonylation of amines/β-amino alcohols, alkoxycarbonylation of epoxides, carbonylative Suzuki coupling, carbonylative Sonogashira, and double carbonylation of aryl iodides has been presented, focusing on the carbonylation reactions studied by us in the past few years, with 81 references.
综述了胺/氨基醇类化合物氧化羰化、环氧化合物氢酯基化、碘代芳烃的羰化Suzuki偶联、羰化Sonogashira以及双羰基化等重要羰基化反应的研究状况,特别是结合本课题组近年来在该领域中的工作,并对羰基化反应的发展及应用前景进行了展望。
- 推荐网络例句
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This one mode pays close attention to network credence foundation of the businessman very much.
这一模式非常关注商人的网络信用基础。
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Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.
扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。
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There is no differences of cell proliferation vitality between labeled and unlabeled NSCs.
双标记神经干细胞的增殖、分化活力与未标记神经干细胞相比无改变。