double bond 中文意思是什麼

double bond 解釋
【化學】雙鍵。

  • double : adj 1 兩倍的，加倍的。2 雙的，二重的，雙重的；對，雙，兩，復。3 雙人用的；折疊式的。4 （意義）雙...
  • bond : n 1 結合（物），結合力，黏合（劑），聯結。2 束縛，羈絆； 〈pl 〉 拘束；鐐，銬。3 契約，契約義務，...
  1. 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。
  2. also adds the double bond.

    同時也加成到雙鍵的兩端。
  3. One atom of oxygen is linked to the nitrogen atom by a double bond.

    一個氧原子以雙鍵與氮原子相連。
  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. In cases of doubt the changes following hydrogenation, bromination or other chemical attack upon the double bond can be studied.

    在有疑問時可以研究雙鍵的氫化，溴化或其他化學反應所引起的變化。
  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. Ym series is an epoxy - bond, two - part liquid thermal cure marking ink. it has such perfimance characters as good printing adaptability, fast curing rate excellent adhesion and insulation resistance. it is better to be used in making double surface and the multipke layers circuit boards

    Ym為雙組液型熱固化標記油墨，具有良好的印刷性，固化速度快，塗膜硬化后具有優異的附著力、耐化學性，特別適合用於雙面及多層印刷電路板。
  9. 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。
  10. Ivermectins ( a mixture containing more than 80 % of 22, 23 - dihydroavermectin bla and less than 20 % of 22, 23 - dihydroavermectin b1b ), which have the same effective antiparasitic activities and the lower level of toxic side - effects than avermectins, are currently synthesized by chemically reducing the double bond between c22 and c23 of avermectins b1

    阿維菌素b1在c - 22 ， 23位的化學加氫還原產物稱為伊維菌素（ ivermectins ） ，具有與阿維菌素相同的殺蟲活性，但毒性更低，更安全。目前國內外報道的伊維菌素生產均是用化學還原法，生產成本很高。
  11. 6. the sectional cross - sectional discrete yield - sruface model is used to spandrel deep beams, the effect of the shear deformation to shear force on ( he m ~ terial nonlinearity is considered, ( he bond slip in anchorage zones is regarded as the houndaty nonlinearity of a member. except the geometric nonhineaicty. consideration of double nonlinearities about materials an

    6 、將分段截面離散的屈服面模型法應用於裙梁，考慮剪力剪切變形對材料非線性的影響，將錨固區鋼筋的粘結滑移看成構件的邊界非線性，不考慮幾何非線件，建立了裙梁考慮村料、邊界雙重非線性的空間滯回曲線分析模型。
  12. Though with the smile of his dear face he draws mother ' s yearning heart to him, yet his little cries over tiny troubles weave the double bond of pity and love

    雖然他用了可愛的臉兒上的微笑，引逗得他* * *熱切的心向著他，然而他的因為細故而發的小小的哭聲，卻編成了憐與愛的雙重約束的帶子。
  13. The chiral compounds synthesized in the project have an unsaturated double bond, which can be mixed with polymerizable nematic liquid crystal compounds, and the resulting mixture can be polymerized to form an optical film having cholesteric liquid crystal texture

    具有可聚合基之旋光性化合物可添加於可聚合型向列型液晶單體中，聚合成具有膽固醇相、反射特定波長之光學薄膜，且較少用量之高螺旋扭轉力性質之旋光性化合物即可配出特定螺距之膽固醇液晶紋理。
  14. Lyase an enzyme that catalyzes the separation of two parts of a molecule with the formation of a double bond in one of them

    裂解酶：一類能催化一個分子的兩部分分離，並在其中一個上形成雙鍵的酶。
  15. They cannot naturally produce essential fatty acids - beneficial nutrients found mainly in plant and fish oil, so they must rely on a dietary supply. here we want to establish transgenic mice carry a tissue - specific expression gossypium hirsutum - 6 fatty acid desaturase ( fad2 ) gene which can add a double bond into an monosaturated fatty - acid hydrocarbon chain and convert oleic acid to linoleic

    本試驗試圖構建一個肌肉組織特性的- 6脂肪酸去飽和酶（脫氫酶）真核表達載體，通過原核顯微注射法把棉花的- 6脂肪酸去飽和酶導入到小鼠體內，以小鼠為動物模型，建立動物體內的必需脂肪酸合成代謝通路。
  16. In this thesis, several new fluorescence carriers have been synthesized bearing a carbon chain with a terminal double bond introduced into the molecule and copolymerized with a monomer under uv irradiation on the silanized glass or quartz disk. the sensors prepared were studied. covalent immobilization effectively prevents the leakage of the carrier dye from the sensor membrane, a phenomenon that shortens the lifetime of ordinary optical sensors

    本論文合成了幾種含末端雙鍵、可共價固定的新型熒光化合物，並以此作為熒光指示劑，與膜基質單體在光引發劑作用下發生光聚反應共聚在經過硅烷化處理的石英或普通玻片上製成光極膜，制備了對一些物質有響應的熒光化學傳感器。
  17. In a covalent bond, two atoms share a pair of electrons, knitting together the respective electron orbitals. two electron pairs are shared in a double bond

    在一個共價鍵中，兩個原子共用一對緊密結合在各自電子軌道上的電子；在一個雙鍵中，有兩對電子共用。
  18. The modification of ( alkyl ) phenolic resins via epoxidation or with rosin, petroleum resins, and other organic compounds or polymers containing unsaturated double bond were discussed respectively, mainly dealing with modification mechanism, modification methods and their applications

    分別討論了（烷基）酚醛樹脂的環氧化改性、松香改性、石油樹脂改性及其他含不飽和鍵的化合物或聚合物改性，主要包括改性原理、改性方法及其應用情況。
  19. The results showed that the breaking strength of the cotton fiber after the limited oxidation by sodium periodate did not decrease remarkably, and the collagen molecules through the c = n double bond of the schiff base combined on the surface of the cotton fiber

    結果表明：經高碘酸鈉有限氧化后棉纖維的斷裂強度降低不明顯；膠原蛋白分子通過席夫堿c = n雙鍵共價結合在棉纖維表面。
  20. The symmetric structure of oxalic acid molecule and two carboxylic group on both ends ensure the stableness of c = c double bond

    草酸分子屬于對稱結構，兩端的羧基使兩個碳原子穩定化。
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