位阻 的英文怎麼說

中文拼音 [wèizǔ]
位阻 英文
steric hindrance
  • 位 : Ⅰ名詞1 （所在或所佔的地方） place; location 2 （職位; 地位） position; post; status 3 （特指皇帝...
  • 阻 : 動詞（阻擋; 阻礙） block; hinder; impede; obstruct
  1. Kodak company describe the use of a solvent-stabilizer system comprising a class of sterically hindered phenols acting both as coupler solvent and stabilizer.

    柯達敘述了一類含有空間位阻酚類作為成色劑和穩定劑。
  2. Because of the interaction of urushiol chains and cus, the transformation temperature tg of hybrid - epu / cus was higher than that of epu. heat stability and solvent resistance were also improved. the interaction and network of urushiol chains were efficiency to inhibit the dimension of cus nanoparticles

    漆酚鏈段與cus之間的作用，以及漆酚交聯網路的存在可有效阻止cus顆粒尺寸的增大，但漆酚交聯網路產生的空間位阻也在一定程度上降低了sz 」的擴散。
  3. A multi-center fragmentation is governed by steric factors.

    多中心斷裂受到位阻因素的控制。
  4. Macromolecules cannot approach the ligand owing to steric hindrance of the matrix.

    由於載體的立體位阻的關系，大分子化合物不能接觸到配基。
  5. It influences the miaow thiazole quinoline to lose slowly that the experiment is drawn the pharmaceutical loses slowly the factor of performance has temperature mainly, density, the membrane time in advance, and design many group ' s simulation systems for different influence of these three factors, is it is it should lose pharmaceutical to lose pharmaceutical slowly one positive pole type, lose performance is it is it form space location hinder after the membrane to absorb to come from mainly slowly slowly to appear to prove, thus isolated the carbon steel base body and corrode the medium

    實驗得出影響咪唑啉緩蝕劑緩蝕性能的因素主要有溫度，濃度，預膜時間，並針對這三個因素的不同影響設計了多組模擬體系，驗證出該緩蝕劑是一種陽極型的緩蝕劑，緩蝕性能主要來自於吸附成膜后形成空間位阻，從而隔離了碳鋼基體和腐蝕介質。
  6. The interactions between particles were discussed based on dlvo and edlvo theories. experiment results show the effect of the ph on the dispersion is due to the repulsion interactions of electrical double layer ; and addition suitable inorganic dispersant or organic macromolecule dispersant results in improvement the stabilization of the dispersion. the main action of the inorganic dispersants is to increase the repulsion interactions of electrical double layer and the main action of organic macromolecule dispersant is to increase hydration shell and steric hindrance

    研究表明： ph對顆粒分散的影響主要體現在對顆粒間雙電層靜電排斥力的改變；添加合適分散劑可以改變顆粒在水中的分散性；無機電解質的分散機制主要是增加顆粒表面的雙電層靜電排斥作用能，而高分子分散劑的分散機制主要是增加顆粒的水化膜排斥能和位阻排斥能；復合分散劑的分散效果要優于單一分散劑；提出了用經時損失性來評價分散穩定性。
  7. Syntheses of ? ? diimine and 2 - aminopyridine transiting metal complexes bearing 2, 6 - unsym - substituents on the aryl, and investigation on the steric and electronic effects of the unsym - subatituents on the catalytic property

    以2 ， 6位不同基團取代的苯胺與相應的二酮反應合成系列的? ?二亞胺和吡啶胺基過渡金屬配合物。主要考察芳環2 ， 6位基團立體位阻對催化性能的影響，同時也考慮基團的推拉電子效應。
  8. Twenty patients with prosopalgia treated by puncturing with a red - hot needle combined with acupoint block therapy

    火針加穴位阻斷治療三叉神經痛20例
  9. By using sterically hindered, electron - rich alkylphosphines and n - heterocyclic carbenes ( nhc ), this process has encompassed a broad range of substrates including ketones, aldehydes, esters, amides, malonates, nitrocompounds, nitriles and sulfones

    隨著大位阻、富電子烷基膦和氮雜環卡賓（ nhc ）為配體的催化體系的出現，該類反應的底物已從酮擴展到醛、酯、酰胺以及含酸性氫的化合物如丙二酸酯、硝基化合物、腈、碸等。
  10. For the bldcm which has a pseudo - sinusoidal back - emf waveform, this dissertation presents a svpwm control method using six discrete position signals for minimizing the torque ripple. the main aspects for the implementation of this method are analyzed, including the initial orientation of the voltage vector, reasonable choice of the impedance angle and the advance commutation angle, and estimation of the successive rotor positions

    針對反電動勢類似正弦的準正弦波反電動勢無刷直流電動機，本文提出一種基於六個離散位置信號的自同步svpwm （電壓空間矢量法）控制方法，用以削弱電磁轉矩脈動，分析了實現這種方法的主要控制環節，包括起動時電壓空間矢量的初始定位，阻抗角與電流超前角的合理選擇以及連續轉子位置的估計等。
  11. Abstract : synthesis of sterically hindered dicyclohexylmethyl 、 l - menthyl and tert - butyl diazoacetate by diazo transfer was described on this paper

    文摘:研究了用重氮轉移法合成具有較大空間位阻的重氮乙酸二環己基甲酯、 l -薄荷酯和叔丁酯。
  12. They were used as efficient lewis acid catalysts for esterification reactions of carboxylic acids with alcohols to afford corresponding saturated esters with 87 % ~ 98 % yields and unsaturated and tertiary ones with 90 % ~ 94 % and 54 % ~ 68 % yields, respectively

    結果表明，該有機錫化合物是合成酯的優良催化劑，產品收率高，飽和一元羧酸酯的收率為87 % ~ 98 % ，對不飽和羧酸酯和空間位阻大的叔醇酯也能得到較滿意的收率，分別為90 % ~ 94 %和54 % ~ 68 % 。
  13. Its trend of development is viewed in this article

    並對位阻型硅烷化試劑的發展趨勢進行展望。
  14. The characteristics, protective principle and application of sterically hindered silane blocking agents were reviewed

    摘要綜述了位阻型硅烷化試劑的特點、保護原理和應用。
  15. The membrane properties were found to be dependent upon the content of styrene. the membrane physic - chemical properties compare to nafion 117 except that their chemical stability has to be further improved to make them acceptable for practical use in the proton exchange membrane fuel cell. the proton transport through the membrane follows the " liquid - like " proton conductivity mechanism y and the water balance is important for the working condition of the fuel cell

    對磺化膜的研究分析表明：膜的性能參數如離子交換容量、吸水率、水合系數、形體穩定性、導電性能、化學與熱穩定性等依賴于膜中苯乙烯含量，且接枝苯乙烯相互間的位阻效應對膜性能影響很大；膜的性能可與nafion膜相比較；質子在膜中的傳導遵循「似液體」質子傳導機理；電滲析與擴散作用使膜保持水平衡。
  16. Dense of structure and development of final properties were benefited from retardation of hydration. in contrast, cement hydration process was controlled better by polycarboxylate superplasticizer than the other three superplasticizers owing to its stereoscopic action. and its adaptability to cement was better, by which the cement particles were

    相比之下，聚羧酸鹽高效減水劑由於其良好的空間位阻效應，能夠使水泥顆粒呈完全分散狀態，與其他三種高效減水劑相比可有效控制水泥水化歷程，與水泥適應性較好。
  17. Because of the place obstruction of corrosion products in the surface of the alloys, while corrosion time is at 120 minutes above, the corrosion rate descends to the stable value in 48 hours

    當腐蝕浸泡的時間大於120分鐘后，腐蝕產物在鋁合金表面產生了明顯的位阻作用，從而使腐蝕速率逐漸下降，直至48小時后，腐蝕速率趨於一相對穩定的數值。
  18. The two peptides are connected with the three amino acid after the analysis of the software on the predication of the protein structure to avoid the interference hi the space

    利用現有蛋白結構預測軟體進行分析避免空間位阻，然後在兩個小的肽鏈之間加上起連接作用的3個氨基酸。
  19. Since the shape memory alloys re - centring damper is provided with hysteretic curve in the " double flag " type, to suppress the response of structure and get the capacity of fully re - centring, the new isolation system combining the above damper with laminated rubber bearing is proposed

    形狀記憶合金自復位阻尼器具有獨特的雙旗型恢復力曲線，本文提出將這種阻尼器與疊層橡膠墊組成新型隔震裝置，以期在降低結構地震反應的同時還能夠獲得震后的復位功能。
  20. The study result is listed as follow : the transformation pseudo - elasticity property of shape memory alloys is simulated exactly with the above mentioned method of value calculation. the shape memory alloys re - centring damper presents typical " double flag " hysteretic curve, and the result accords with the theory analysis. the property of above new isolation device is excellent, the seismic response of the super - structure is significantly reduced, and the fully re - centring capacity after earthquake is obtained

    研究結果表明，文中所提的數值求解方法能夠反映形狀記憶合金相變偽彈性的基本特徵；形狀記憶合金自復位阻尼器在循環荷載下呈現出典型的雙旗型滯回曲線，程序的模擬結果與理論分析相吻合；這種新型隔震裝置的性能優良，既可以大大減輕地震對上部結構的影響，同時也具有很好的震后自復位功能。
分享友人
分享到 Line

分享到臉書