烯鍵 的英文怎麼說

中文拼音 [xījiàn]
烯鍵 英文
ethylene linkage; ethylenic linkage
  • 烯 : 名詞[化學] （有機化合物的一類） alkene; olefince
  • 鍵 : 名詞1 [機械工程] （使軸與齒輪、皮帶輪等連接並固定在一起的零件） key 2 [書面語] （插門的金屬棍子）...
  1. The enzyme 5 - enolpyuvyl - 3 - phosphoshikimic acid synthase ( epsp synthase ; ec2. 5. 1. 19 ), encoded by anoa locus, is a key enzyme present in microorganisms and plants where it has a function in the biosynthesis of aromatic amino acids. glyphosate ( n - phosphonomethyl - glycine ) is an effective non - selective, broad spectrum, postemergence herbicide, which has been shown to inhibit epsp synthase activity in a competitive manner. glyphosate tolerant plants can be mediated by either overproduction of the target enzyme or by the presence of an altered enzyme

    植物和微生物芳香族氨基酸生物合成過程中的一個關鍵酶? ? 5 -烯醇丙酮莽草酸- 3 -磷酸合成酶（ epspsynthase ； ec2 . 5 . 1 . 19 ）由aroa基因編碼，該酶受廣譜滅生性、內吸傳導型除草劑草甘膦的競爭性抑制，將epsp合成酶基因轉入植物中可獲得草甘膦耐受植株。
  2. First, a terminal double bond was introduced into 3 - amino - 9 - ethylcarbazole ( aec ) via methacryloyl chloride to obtain the compound, 3 - ( n - methacryloyl ) amino - 9 - ethylcarbazole ( mec ). second, mec was copolymerized with butyl methacrylate to prepare the mec - immobilized polymer particles. the resultant polymer particles were used as a fluorescence probe, which was almost free of dye leaching, and had higher photostability in comparison with free aec

    首先利用甲基丙烯酰氯向3 -氨基- 9 -乙基咔唑（ aec ）分子中引入末端雙鍵，得到帶末端雙鍵的熒光指示劑3 - （ n -甲基丙烯酰基）氨基- 9 -乙基咔唑（ mec ） ，然後通過乳液聚合技術將mec共價固定到聚甲基丙烯酸丁酯基體上，制得一種共價固定了mec的聚合物顆粒。
  3. Compounds containing two double bonds are called dienes.

    包含兩個雙鍵的化合物叫做二烯烴。
  4. In the ethyne molecule, a double bond links together the two carbon atoms.

    在乙烯分子中是由一個雙鍵將兩個碳原子連結在一起的。
  5. The triple bond does not usually react so vigorously at a carbon-carbon double bond.

    三鍵在反應時一般不象烯烴中的碳-碳雙鍵那樣劇烈。
  6. Regular vinyl addition polymers may be obtained from particularly strained endocyclic double bonds.

    由帶特殊張力的橋環雙鍵可以得到規整的乙烯類加成聚合物。
  7. Depending upon reaction conditions, the product may be a polyketone formed b y addition polymerization of the ketene double bond.

    隨著反應條件的不同，產物可以是由烯酮的雙鍵加成聚合得到的聚酮。
  8. An organic compound containing many double bonds

    多烯一種包含許多雙鍵的有機化合物
  9. A novel ring - enlargement oxidation of polyphenyl substituted cyclopentadienes in air ( or molecular oxygen ) promoted by perchloric acid was described, in which an oxygen atom was inserted into the cyclopentadiene - ring, forming a six - membered pyrylium salts

    摘要報導了空氣（或氧氣）存在的條件下，由高氯酸引發多苯基取代環戊二烯發生新穎的碳碳鍵斷裂擴環反應，在此反應中，氧原子插人到環戊二烯環中形成相應的六元環吡喃鹽類化合物。
  10. The article analyze the concrete drying shrinkage mechanism, find the major factors of affecting the drying shrinkage, analyze the lack of shrinkage reducing agent, who be of low molecular weight and line chain, design a new shrinkage reducing agent ? ? shrinkage reducing agent of poly - acrylate. the shrinkage reducing agent of poly - acrylate is mainly composed of crylic acid 、 cinnamene 、 poly - glycol 、 solicitating agent 、 chain transferring agent and activator, which come by these processes of polymerization 、 esterifing and neutralization to form a pectinate polymer, which have a high molecular weight and many poly - oxidative alkenes

    論文分析了混凝土乾燥收縮的機理，確定了影響乾燥收縮的關鍵因素，分析已有低分子量的、直鏈型減縮劑的不足，設計了一種新型的減縮劑? ?聚丙烯酸鹽類減縮劑，其主要由丙烯酸、苯乙烯、聚乙二醇、引發劑、鏈轉移劑、催化劑等經過聚合、酯化和中和反應，生成一種高分子量的、含聚氧化烯鏈的聚合物。
  11. Using molecular imprinting method, the 1, 3 - dimethylxanthine theophylline, tho molecular recognition membranes, containing an segments as membrane formation sites and aa segments as functional sites, were prepared by the phase inversion technique. here, tho was selected as a template molecule. the hydrogen bonding between aa segments and the tho templates was measured by ft - ir and nmr. the tho templates can be removed from the membrane through washing with acetic acid aqueous solution. the permeation of tho through the membranes is far more than that of 1, 3, 7 - trimethylxanthine caffeine, caf, which demonstrated the function of tho molecular recognition of the membrane. the results also show that the increase of the tho templates concentration in the cast solution caused an increase of tho amounts taken into the copolymer membrane

    Ft - ir及nmr測試結果表明：制備的高分子膜中， tho模板分子和膜中的丙烯酸功能殘基存在著氫鍵鍵合作用。大量的極性醋酸水溶液可抽出膜中的模板分子。 tho溶液和與模板分子具有相似結構的1 ， 3 ， 7 -三甲基黃嘌呤咖啡因， caf溶液的基質透過實驗結果：進入膜結構中tho分子的量遠大於caf分子，這表明制備的高分子膜具有tho分子識別功能。
  12. There is alkenyl double bond in the molecular structure and can form linear homopolymer and all kinds of copolymers by various polymerization reaction

    該分子結構中含有烯基雙鍵，可以通過各種聚合反應，形成線性均聚物和各種共聚物。
  13. The common biosynthesis pathway of aromatic amino acids includes seven steps from dahp to chorismate acid. for the common pathway, 3 - dehydroquinate ( dhq ) synthase ( encoded by arob ), 5 - enolpyruv - oylshikimate s - phosphate ( epsp ) synthase ( encoded by aroa ), and chorisma - te synthase ( encoded by aroc ] are rate - limiting enzymes

    芳香族氨基酸的合成步驟有七步是共同的，亦即從dahp到分支酸的合成步驟，其中脫氫奎寧酸合成酶（ arob ） 、 5 -烯醇式丙酮酰莽草酸合成酶（ aroa ）和分支酸合成酶（ aroc ）是此代謝途徑的關鍵酶。
  14. Ps radiation mechanism has been discussed and investigated for many years and many theoretical models have been proposed to describe photoluminescence in porous silicon, for instance quantum confinement effect model, polysilanes model, siloxen and its derivant, surfacial states model and quantum confinement - light center model etc. in addition, study status of ps at present is addressed and applied problems in some fields are analyzed in this section

    多年來，人們對多孔硅發光機理一直進行著堅持不懈的探討和研究，提出了許多種解釋多孔硅層（ psl ）發光的模型，典型的有下列幾種：量子限制模型、硅-氫鍵或多硅烷（ polysilanes ）的發光、硅氧烯及其衍生物的發光、表面態模型和量子限制-發光中心模型。
  15. He is not only technician and operator, but also a developer, deviser, custodian, intendance & checker. we should normalize the operations, enhance the management of material and equipment, strengthen the control of engineering process, proof - test & application on people - oriented basis so as to ensure pe gas pipeline engineering quality from all aspects

    在工程質量保障措施中，人是最關鍵的，不單是施工技術人員和具體操作工人，而且包括建設、設計、監理、監督、檢測等單位的相關人員，應做到以人為本，規范化操作，加強設備材料、施工機具的管理，加強施工過程、驗收、使用的控制，從各個方面保證聚乙烯燃氣管道的工程質量。
  16. Internal heated boiling dryer is the key equipment in the pro - duction of the polyvinyl chloride, and the heat transfer tubes are the key part in this equipment

    內熱式沸騰乾燥器是聚氯乙烯生產中關鍵核心設備，換熱管組是該設備上主要部件。
  17. In this article we cloned two crucial gibberellins biosynthesis enzyme genes : ent - kaurene oxidase and 20 - oxidase, and we investigated their expression patterns. 1

    本文克隆了赤霉素生物合成途徑中關鍵合成酶：貝殼杉烯氧化酶和20 -氧化酶，並研究了二者在果樹生長發育中的表達規律。
  18. The results of lauryl sodium sulfate - polyacrylamide gel electrophoreses ( sds - page ) of the aggregate precipitate and supernatant and the result of high - performance size - exclusion chromatography of the supernatant indicated that, by wrongly linked intermolecular disulfide bonds soluble bi - molecular and tri - molecular egg white lysozyme aggregate could be simultaneously formed except being renatured to native and active egg white lysozymes during the refolding procedure of denatured - reduced egg white lysozyme ; the aggregate precipitate could be further formed by the non - covalent bonds interaction between the soluble hi - molecular egg white lysozyme aggregates, and the soluble tri - molecular egg white lysozyme aggregate could still stay at the supernatant

    沉澱和上清液的不連續十二烷基硫酸鈉聚丙烯酰胺凝膠電泳（ sds - page ）和高效凝膠排阻層析分析結果表明，還原脲變性蛋白溶菌酶在稀釋復性過程中除了能夠復性成天然態蛋白溶菌酶分子外，還會形成可溶的蛋白溶菌酶分子二聚體和三聚體，二聚體和三聚體主要是靠分子間二硫鍵的錯配連接而成的；可溶的蛋白溶菌酶分子二聚體之間通過非共價鍵相互作用而形成集聚體沉澱，而可溶的三聚體溶菌酶分子則仍處于復性液上清液中。
  19. China university of science and technology li yin - mei group, proposed to dark field microscopy observation of light scattering technology and optical tweezers capture the idea of combining the traditional optical microscope optical tweezers system from the side of a bouquet of flake coupling laser irradiation samples, laser incident in a specific location, so that samples of the particles scattered light through the microscope imaging ; overcome the well - optical tweezers and microscopic imaging of laser irradiation, as well as strictly coincidence of the three key technologies to achieve the optical tweezers capture 100 nanometer - styrene ball at the same time also in the entire field of view of microscopic observation of nano - particles, to capture optical tweezers nanoparticles can also observation purposes

    中國科學技術大學李銀妹課題組，提出將暗場顯微術觀察光散射的技術與光鑷捕獲相結合的設想，在傳統光學顯微鏡光鑷系統上從側面耦合一束片狀激光照射樣品，在特定的激光入射位置，使樣品中粒子的散射光可通過顯微鏡成像；克服光鑷的阱位與顯微成像面以及激光照射面三者嚴格重合的技術關鍵，實現了光鑷捕獲100納米聚苯乙烯小球的同時也能在整個顯微視場中觀察納米粒子，達到了光鑷捕獲納米粒子的同時也能觀測的目的。
  20. Some advantage caused by spraying water between the stages of centrifugal compressor was attained, and the theory was used successfully in cracking gas centrifugal compressor of the key machine of ethylene cracking facility

    摘要通過對濕壓縮概念的介紹和分析，得出了離心式氣體壓縮機在級間噴水會帶來的多點優勢，並將這一理論成功應用於乙烯裂解裝置的關鍵設備裂解氣壓縮機。
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