點環反應 的英文怎麼說

中文拼音 [diǎnhuánfǎnyīng]
點環反應 英文
electrocyclic reaction
  • 點 : Ⅰ名詞1 （液體的小滴） drop （of liquid） 2 （細小的痕跡） spot; dot; speck 3 （漢字的筆畫「、」）...
  • 環 : Ⅰ名詞1 （環子） ring; hoop 2 （環節） link 3 （姓氏） a surname Ⅱ動詞（圍繞） surround; encircle;...
  • 反 : Ⅰ名詞1 （方向相背） reverse side 2 （造反） rebellion 3 （指反革命、反動派） counterrevolutionari...
  • 應 : 應動詞1 （回答） answer; respond to; echo 2 （滿足要求） comply with; grant 3 （順應; 適應） suit...
  1. The characterization of " click chemistry " ( the 1, 3 - dipolar cycloaddition combined with the synthetic design of triazoles and tetrazoles ) is reviewed, and some recent examples of various bioconjugates synthesis are introduced based on the " click chemistry "

    摘要介紹了利用1 ， 3 -偶極環加成反應合成氮雜三唑和氮雜四唑的設計方法和反應特點，以及氮雜唑類化合物的合成在生物綴合物研究中的應用。
  2. Abstract : seven major methods and their reaction characteristics for the synthesis of primary vicinal diamines starting from epoxides, and alkenes etc. are given in detail

    文摘:詳細綜述了從環氧化合物、烯烴等為起始原料合成一系列一級鄰二胺的七條主要路線，並比較了各條反應路線的特點。
  3. In order to solve the problems with heavy turpentine, such as complex constituents, vicinal boiling point, difficult to separation and hard to comprehensive utilization, the - santalene was converted to natural structure similar product - santalol by light - oxidize reaction, and caryophyllene epoxide was obtained at the same time

    摘要為了解決重質松節油組成復雜、沸點相近導致分離困難、難以深加工綜合利用等問題，利用光氧化反應技術，將其中的-檀香烯轉化為與天然-檀香醇結構相似的檀香型新香料-檀香烯醇，同時可得到環氧石竹烯。
  4. By virtue of the anhydride property of the isoimide rings, the piis were reacted with the alcohols to form poly ( amic acid ) esters ( paes )

    利用異酰亞胺環具有酸酐性質的特點，使之與醇類反應，得到溶解性能優良的聚酰胺酯（ paes ） 。
  5. Membrane bioreactors have some advantages of saving resources, environmental protection and clean production in bioconversion of organic compounds, and have already become one of the hot research fields these years

    摘要膜生物反應器可用於有機化合物生物轉化，在強調資源節約、環境友好和清潔化生產技術的今天，顯示出一些特別的優點，近年來已成為熱門的研究領域。
  6. The new high effective water - reducing agent act - fdn has characteristic of reactivity, it ca n ' t dissolve in water but do in alklia. in the concrete, it decompounds slowly and gives out sulfonate group which has dispersity, this can make the high effective water - reducing agent available for a long time, therefore it can reduce slump loss

    研製的新型高效減水劑act - fdn ，具有反應性的特點，不溶於水但溶於堿，在混凝土這樣的堿性環境下可以緩慢分解釋放出具有分散性能的陰離子磺酸基，使高效減水劑能夠持久發揮作用，從而達到了降低坍落度損失的目的。
  7. A approximately 460bp dna fragment was amplified by pcr from lactococcus lactis nizo r5 genome. the primers used in this study comprised the following nucleotide sequences : 5 " - cgcgaattcgatataggtttattgagt - 3 " and 5 " - atgaagcttatccatgtcagaactaa - 3 ". conditions used for the pcr consisted of 30 cycles of 94 ? for0. 5min, 45 ? for imin and 72 ? for 1. 5min, plus one additional cycle of 72 for 10min

    根據已發表的乳鏈菌肽前體基因的dna序列，設計兩條引物並引入酶切位點。以lactococcuslactisr5基因組dna為模板， pcr反應條件： 94變性30s ， 45退火60s ， 72延伸90s ，反應進行30個循環。成功擴出一條約460bp的dna片段。
  8. This pump is of jet pump with circulating water asworking liquid and designed by negative pressure produced from spraying liqunid. it is ar new vacuumair pump, which can provide with circulating cooling water to the reaction of device at same time

    該泵是以循環水為工作流體，採用射流技術產生負壓而設計的一種新型真空抽氣泵，它不僅是一種真空抽氣裝置，同時還能向反應裝置中提供循環冷卻水，該泵具有不用油、無污染、耐腐蝕、噪音低、方便靈活等特點。
  9. The behavior of 1, 6 - enyne in the presence of transition metal catalysts had been extensively studied. 1, 6 - enyne cycloisomerization reactions catalyzed by transition metals and three different reaction pathways, namely cyclometalation, halorhodation and - allyl rhodium route, divided according to the reaction mechanism are summarized and discussed

    摘要1 ， 6 -烯炔底物在過渡金屬催化劑作用下的化學行為得到了廣泛的研究，重點是關于過渡金屬催化的1 ， 6 -烯炔環異構化反應，從反應機理角度入手，把1 ， 6 -烯炔環異構化反應按啟動方式總結為三類，關對這三種方式啟動的1 ， 6 -烯炔構化應進行了詳細地總結和闡述。
  10. To regard market demand as driving force and optimize the business procedure of each link that enterprises distribute system : purchase management, allot management, sale management, provide and deliver management, stock control, customer management, settlement management, pricing system management, market analysis, etc., and make enterprises grasp all kinds of information and make the fast reaction to the change of market demand in time, thus promote the each sale nodal connection of enterprises and the distribution system. with the shortest supply route, the fastest reaction speed, the minimum cost, individualized products and service, and improve the customer s satisfaction

    以市場需求為驅動力，優化企業分銷體系各個環節的業務流程：采購管理調撥管理同城異地銷售管理配送管理庫存管理客戶管理結算管理價格體系管理市場分析等等，使企業及時掌握各類信息並對市場需求的變化做出快速反應，從而增進企業與分銷體系各銷售節點的聯系，以最短的供應路線最快的反應速度最低的成本個性化的產品與服務，提高客戶的滿意度。
  11. As to traditional marketing channel, under new economy environment based on knowledge and information technology, and characterized by individuation, interaction and fast speed, enterprises have to directly face the problems such as how to cut down unreasonable marketing channel costs, how to establish the speediness mechanism of marketing channel, how to reasonably allocate rare profit between marketing channel members, how to transform push system of marketing channel into pull system, and so on

    單就企業的營銷渠道而言，面對以知識、信息技術為基礎，追求個性化、速度化和互動化為特點的新經濟環境，如何降低不合理的營銷渠道成本、如何建立營銷渠道的快速反應機制、營銷渠道成員如何實現薄利的合理分配以及營銷渠道如何實現由推動型（ pushsystem ）向拉動型（ pullsystem ）轉變等都是傳統營銷渠道不得不直接面對的問題。
  12. There is difference frequency measurement requirement for every part of pid regulating, difference between dynamic quality and static quality in response time and accuracy. according to these, it use the interrupt functions and high - speed counter of the simens s7 - 200 plc cpu226 basic unit and some peripheral circuit to measure frequency ; in software designed, the procedure frame of hydraulic - turbine governor and disperse process of parallel pid are analyzed, an improved pid algorithm is adopted to realize a pid regulation mode with variable structure and parameters ; the mechanical liquid - pressure system of the hydraulic - turbine governor is with electric - hydraulic converter unit of step motor. according to the drive character of five phase of response step motor, a variable frequency regulated voltage driver unit is designed in order to realize interface between plc and driver of step motor

    本文利用s7 - 200plc自身的特點設計了頻率測量單元，根據pid調節各個環節的特點，以及調速器動態特性、靜態特性對頻率測量的實時性和精度要求的不同，利用s7 - 200plc基本單元中內置的高速計數器以及相應的外圍放大整形、分頻電路，實現了水輪發電機組頻率的測量；在軟體上，對微機調速器的整個程序框架、並聯pid的離散化過程進行了分析，選用改進的pid演算法實現了變參數、變結構的pid調節模式；調速器的機械液壓隨動系統具有步進電機電液轉換元件，採用五相反應式步進電機，根據其驅動特性設計了變頻調壓驅動器，實現plc與步進電機驅動器之間數字介面。
  13. From the viewpoint of safety technology of chemical reaction with heat release. the technical causes of getting out of control of these reactors are analyzed. hazardous effects of the leakage of chemical reactants both on human and environment, and the existing problems in current safety technological measures are also discussed. the cooling method of jet vaporization based on the jet principle and the direct cooling by non - vaporized liquid are introduced. the development trends of the safety technology for chemical reactors are analyzed

    從放熱化學反應的安全技術觀點出發，分析了放熱化學反應器失控的技術原因、化學反應物泄漏對人員和環境造成的危害、現有安全技術措施存在的問題；介紹了基於射流原理的噴射汽化和非汽化冷卻液體的直接冷卻方法；還展望了化學反應器安全技術的發展方向。
  14. Abstract : from the viewpoint of safety technology of chemical reaction with heat release. the technical causes of getting out of control of these reactors are analyzed. hazardous effects of the leakage of chemical reactants both on human and environment, and the existing problems in current safety technological measures are also discussed. the cooling method of jet vaporization based on the jet principle and the direct cooling by non - vaporized liquid are introduced. the development trends of the safety technology for chemical reactors are analyzed

    文摘:從放熱化學反應的安全技術觀點出發，分析了放熱化學反應器失控的技術原因、化學反應物泄漏對人員和環境造成的危害、現有安全技術措施存在的問題；介紹了基於射流原理的噴射汽化和非汽化冷卻液體的直接冷卻方法；還展望了化學反應器安全技術的發展方向。
  15. According to the features of naphthenic base oil ( i. e., high nitrogen and low sulfur content ) and based upon theoretical analysis of the h2s concentration needed for phase equilibrium of nickel sulfide and tungsten sulfide in hydrogen, the most economic quantity of sulfiding agent injected into the reactor for supplement of sulfur in lube oil hydrogenation catalysts was obtained

    摘要針對環烷基油高氮、低硫的特點，通過對硫化鎢和硫化鎳在氫氣中相平衡態所需硫化氫濃度的理論分析，對反應器入口所需補硫量作了詳細的闡述，得出了最經濟的補充注硫量。
  16. For example, frp reinforced concrete is used to support or surround magnetic resonance imaging ( mri ) medical equipment, and frp is also used for the constructions of some seawalls, industrial roof decks, base pads for electrical and reactor equipment, anchor in rock and ground engineering and concrete floor slabs in aggressive chemical environments in order to promote the wide usage of frp and frp reinforced concrete structures, financed cooperatively by nationa l natural science foundation ( item : the research on mechanical performance of frp reinforced concrete beam reinforced ; number : 59978046 ) and henan illustrious youth science foundation, connected with the analysis methods of modern steel reinforced concrete structure, the thesis further studies the flexural performance of frp reinforced concrete beam through the systematic study on experimental data got from this kind of beams, systematically establishes the theoretical calculating system of the flexural performance of frp reinforced concrete beam in cooperation with the up - to - date analytical methods for reinforced concrete, which suits the properties of frp

    例如，纖維增強塑料筋應用於支撐和圍繞磁共振成像醫療設備的混凝土中及海堤、工業頂棚、電設備、反應設備的基座、巖土工程中的錨桿、侵蝕性環境的混凝土結構等海洋工程、橋梁工程、路面工程、巖土工程、醫療及化工工程的建設。為了推動纖維增強塑料筋及其混凝土結構在工程中的廣泛應用，本文在國家自然科學基金（項目名稱：纖維增強塑料筋混凝土梁力學性能的研究；編號： 59978046 ）和河南省傑出青年基金的資助下，通過對纖維增強塑料筋混凝土梁正截面受彎性能試驗數據的系統分析，結合現代鋼筋混凝土結構學的分析方法，對纖維增強塑料筋混凝土梁正截面受彎性能進行了深入的研究，較系統的建立了適合於纖維增強塑料筋特點的纖維增強塑料筋混凝土梁正截面受彎性能的理論計算體系。
  17. The traditional catalyst used in acetal ( ketal ) synthetic reaction is strong inorganic acid. but there is some limits to its use because of its side reaction, strong erosion and liability to pollute the environment. molybdophosphoric acid is used as catalyst and three condensation products are prepared through the direct reaction of aldehydes ( ketones ) and ethylene. in addition, several elements of affecting the reaction is researched. it is proved that molybdophosphoric acid is very active as catalyst in less addition, the product yield is quite high and the quality of reuse is quite good

    縮醛（酮）合成反應的傳統催化劑為無機強酸，但由於副反應多、腐蝕性強和易污染環境等缺點，其使用受到限制.用磷鉬酸為催化劑，通過醛（酮）與乙二醇直接反應得到了三種縮合產物.對影響反應的諸因素進行研究，結果表明，用磷鉬酸作催化劑，用量小，活性高，產品收率較高，且重復使用性能較好
  18. Abstract : the traditional catalyst used in acetal ( ketal ) synthetic reaction is strong inorganic acid. but there is some limits to its use because of its side reaction, strong erosion and liability to pollute the environment. molybdophosphoric acid is used as catalyst and three condensation products are prepared through the direct reaction of aldehydes ( ketones ) and ethylene. in addition, several elements of affecting the reaction is researched. it is proved that molybdophosphoric acid is very active as catalyst in less addition, the product yield is quite high and the quality of reuse is quite good

    文摘:縮醛（酮）合成反應的傳統催化劑為無機強酸，但由於副反應多、腐蝕性強和易污染環境等缺點，其使用受到限制.用磷鉬酸為催化劑，通過醛（酮）與乙二醇直接反應得到了三種縮合產物.對影響反應的諸因素進行研究，結果表明，用磷鉬酸作催化劑，用量小，活性高，產品收率較高，且重復使用性能較好
  19. The paper introduces a new highly - effective synthesis method. decoquinate was synthesized with catechol as starting materials via substitution, reduction, and at last cyclization with " dowtherm a " as solvent

    摘要以鄰苯二酚為原料，通過一系列取代反應，再經過還原、縮合，最後在高沸點的混合有機溶劑中關環。制備的3 -喹啉羧酸乙酯衍生物的總收率為24 . 2 % 。
  20. Brushed with the thickness of 1. 5 ~ 2. 0mm. it can improve the impermeability pressure up 3 times that of blank samples ; the crystalline reaction can continuously carry out, sealing the crack and waterproofing for ever if water is existent ; very good environmental adaptability, and can be used as normal at ph 3. 0 ~ 12. 0 ; moreover, the contrast tests of the performance of pt coating with two kinds of widely used waterproofing coating xypex and coprox were also carried out in this paper. test results show that the properties such as impermeability, self - rehabilitating ability and corrosion resistance are superior to those of the counterparts

    試驗結果表明， pt防水塗料具有如下的性能特點：具有良好的防水性能，塗刷厚度1 . 5 2 . 0mm ，抗滲壓力可提高3倍以上；在有水的條件下，結晶反應可以不斷進行，能實現自愈合、永久性防水；具有很強的環境適應性，在ph值3 . 0 12 . 0條件下均可正常使用；此外，本文還進行了pt防水塗料與同類型防水材料xypex和防水寶（二者都是目前應用廣泛的防水塗料）的性能對比試驗。
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