還原性環化 的英文怎麼說

中文拼音 [háiyuánxìnghuánhuà]
還原性環化 英文
reductive cyclization
  • 還 : 還副詞1 （表示現象繼續存在或動作繼續進行; 仍舊） still; yet 2 （表示在某種程度之上有所增加） even...
  • 原 : Ⅰ形容詞1 （最初的; 原來的） primary; original; former 2 （沒有加工的） unprocessed; raw Ⅱ動詞（原...
  • 性 : Ⅰ名詞1 （性格） nature; character; disposition 2 （性能; 性質） property; quality 3 （性別） sex ...
  • 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;...
  • 還原 : 1 （恢復原狀） return to the original condition or shape; restore2 [化學] （還原作用） reduction;...
  1. In this thesis, in order to reducing the amount of the pt catalyst, improving the electrocatalytic activity of the pt catalysts and utilization ratio of pt, the electrochemical codeposition method by cyclic voltammetry ( cv ) was used to prepare a series pt / moox / glassy carbon ( gc ) composite electrodes with high dispersibility. the composite electrode, pt / moox / gc, was characterized to study its composition and its electro chemical behavior by cv. using the xrd and sem techniques, the size and the dispersion degree of the catalyst particles were studied in presence or absence of moox in the catalyst

    為了降低主催化劑pt的用量、提高pt的活性和利用率，本論文利用循環伏安法共沉積制備高分散的pt moo _ x催化劑顆粒，利用循環伏安電化學表徵、 xrd和sem技術研究了引入moo _ x后的催化劑即pt moo _ x顆粒的粒子大小、分散狀態；利用icp - aes定量分析pt moo _ x催化劑顆粒的組成含量；並藉助于電化學方法分別評價了pt moo _ x gc電極催化劑的對甲醇的電催化活性和穩定性、氧還原電催化活性。
  2. We make the best use of foreign advanced technology to meet the requirements of different units and the demand of users to its limit. for instance, turbo - sorp technique, wet limestone - gypsum fgd, sda, scr flue gas denitration technique

    例如：環湍流吸收turbo - sorp技術濕式石灰石石膏法煙氣脫硫技術霧乾燥法sda選擇性催化還原scr煙氣脫硝技術等，最大限度地滿足了不同機組不同用戶的需要。
  3. Using redox initiation, a kind of room - temperature fast curing two - component adhesive was prepared with expoxy arcylate, other active monomers and additives

    採用氧化還原的引發方式，用環氧丙烯酸酯及其它活性單體和添加劑制備出一種室溫快固型雙組分膠粘劑。
  4. The product is a chief material for high temperature insulant, used mainly for the producing of polyimid resin, thin film, and insulating paint. it is also a high temperature curing agent and plasticizer. some kinds of curing agents of powder coating are made from it

    主要用於制聚酰亞胺樹脂，聚酰亞胺在廣泛的溫度范圍內具有優良的電氣絕緣性能，亦可做耐高溫環氧樹脂固化劑聚氯乙烯增塑劑及皮革柔軟劑，還可用做某些粉末原料。
  5. In order to improve the electro - catalytic activity of platinum based catalyst to methanol oxidation, in this thesis, firstly prepare heteropoly acid modified pt / gc electrode with different concentration by cyclic voltammetry method, and then test the cyclic voltammetry curves individually in vitriolic and methanol solution. the study shows the best concentration for both phosphomolybdic acid and phosphotungstic acid is 1 10 ~ ( - 3 ) mol / l. and find the more heteropoly acid modified on electrode, the lower peak - up potential towards methanol because of the existence of oxygenous species

    為了改善鉑基催化劑氧化甲醇的催化活性，本論文首先通過循環伏安掃描法制備了不同濃度磷鉬酸和磷鎢酸修飾的pt / gc電極，通過研究pt / gc電極在修飾前後在硫酸溶液中及含甲醇的硫酸溶液中的循環伏安行為發現，磷鉬酸和磷鎢酸均能在ptru / c電極上發生氧化還原反應，而且雜多酸修飾濃度對pt / gc電極氧化甲醇的催化活性有很大影響。
  6. 4 ) the characteristic of tricyclic terpane reflected the source input of algae. the predominance of 4 - methylsterane and dinosterane, and the c _ ( 27 ) - sterane predominance " v " distribution pattern all indicate the great contribution of algae source input. based on the ratio of sterane c2920s / ( 20s + 20r ) and c29 / ( + ), the source rocks can be regarded as typical immature source rocks

    2 、利用豐富的生物標志化合物信息，分析解釋了生源構成、沉積環境、有機質演化等特徵，表明德南窪陷主力烴源巖的生源構成是以菌藻類微生物為主且含有一定陸生植物輸入的混合生源，沉積環境為半鹹水-鹹水還原環境，沉積水體具有「層狀」特點，表層鹽度高，底層還原性強。
  7. The low solubility of calcium zincate produced from the chemical reaction of zinc oxide and calcium hydroxide in alkaline solution can improve the cycling life the zinc electrode, and the discharge capacity will tend to be stable. furthermore, the effects of la2o3 additives on the electrochemical performances of zinc electrodes were investigated. the results shows that the addition of la2o3, in zinc electrode can improve the area of reduction peak and the hydrogen evolution potential which means the cathodic hydrogen evolution reaction can be hindered

    氧化鋅與氫氧化鈣在堿性溶液中化學反應生成的難溶於堿的鋅酸鈣可以使鋅電極的循環壽命得到提高，放電容量也趨于平穩，此外還考察了氧化鑭對鋅酸鈣電極電化學性能的影響，結果表明：添加適量氧化鑭能明顯改善鋅電極的電化學性能，使鋅電極的還原峰電位正移，電極反應可逆性得到改善，同時也可抑制鋅電極析氫反應的發生，提高了鋅電極的陽極電流，對陽極反應有一定的活化作用；同時還可以改善鋅電極的放電特性，增加電極的放電容量。
  8. In the first part of this paper, mn ( iii ) / mn ( ii ) couple in h2so4 was firstly applied as the positive couple to this system, i. e. redox flow cell. its chemical, electrochemical properties, redox kinetics and related parameters were characterized and discussed by rotating disc electrode ( rde ), cyclic voltammetry ( cv ), a. c. impedance ( a. c. imp ), chronoamperometry, tafel curve, and galvanostatic charge / discharge techniques. conclusions have been drawn as follows : 1. the electrochemical kinetics of mn ( iii ) / mn ( ii ) redox couple in 6. 3m h2so4 solution were studied by means of rotating disc electrode ( rde ) technique on platinum electrode

    本文第一部分首次成功地將酸性介質中的mn （ iii ） / mn （ ii ）電對應用於氧化還原液流電池這一新型儲能裝置的正極活性材料，通過旋轉圓盤（ rde ） 、循環伏安（ cv ） 、交流阻抗（ a . c . imp ） 、恆電位階躍、 tafel實驗以及mn （ iii ） / mn （ ii ）單電極的恆流充放電實驗，我們得出以下結論： 1 .在旋轉圓盤電極上，不同轉速范圍，不同的極化過電位， mn （ ） / mn （ ）體系氧化還原電極過程的控制步驟不同，電荷傳遞、擴散傳質可分別或聯合成為控制步驟。
  9. The research of soil degradation in pur country is mainly concentrated on the red earth hilly area in the south in the past, and is less on the loess plateau that is one of the most fragile areas. based on field experiment and laboratory analysis, discuses the degradation mechanism, and raises the methods of refreshing and reestablishing land productivity of huangshan soil in chunhua county of shaanxi. in the hope of serving development of western regions and ecological environment construction that concede the land to forestry ( the grass )

    我國以前對土壤退化問題的研究主要集中於南方紅壤丘陵區，對生態環境最脆弱的黃土高原地區的土壤退化研究相對較少，故本文以黃土高原地區陜西淳化縣的侵蝕性黃?土為對象，通過野外人工模擬降雨試驗和室內分析相結合的方法，探討了侵蝕性黃?土的退化機理，提出了恢復和重建黃?土土地生產力的途徑和方法，以期服務于西部大開發和退耕還林（草）的生態環境建設。
  10. The recombinants were constructed by transforming ppic9 a - xynb into p. pastoris gs115. the assay results revealed that the xylanase gene xynb was overexpressed and secreted effectually in p. pastoris. in 3l fermentor the expression level of xylanase xynba exceeded 1200iu / ml and the expressed xylanase had normal bioactivity. the molecule weight of xynba was determined as about 31kd which is higher than 23kd of original enzyme xynb from streptomyces olivaceoviridis a1. xynbb was gotten by deglycasylation of xynba, whose molecule weight returned to 23kd. we comparised the enzymatic properties of xynba expressed in p. pastoris, xynbb deglycasylated from xynba and xynb produced from streptomyces olivaceoviridis al : there was little difference among the three enzymes on optimal ph, the optimal ph of xynb and xynba were both 5. 2, the optimal ph of xynbb was 5. 0 ; the optimal temperature of xynb and xynba were both 60 c, while the optimal temperature of xynbb was 50 ? ; because of glycosylation the thermal stability of xynba was better than xynb and xynbb ; the specific activity of xynba and xynbb were 883. 88iu / mg and 832. 5hu / mg respectively, which were both lower than 2814. 45iu / mg of xynb ; the km values of xynb and xynba were similar to each other which were 21. 56 ( g / kg ) and 20. 87 ( g / kg ), while the km value of xynbb was 27. 10 ( g / kg ) ; the fmax of xynba and xynbb were 4568umol / mg. min and 5329umol / mg. min respectively which were lower than 27623 umol / mg. min of xynb ; additionally all of the three enzymes did not display cellulase activity. they all had well resistance to pepsion and trypsin, and were not sensitive to metal iron, surface active agent and chelating agent. the analysis of different xylans enzymatic hydrolysate revealed : by xynba, that the main constitutions of enzymatic hydrolysate of birch wood xylans were xylotriose and xyloquaiose, which account for 68. 43 % and 16. 50 % respectively, additionally there was 11. 79 % of xylobiose ; the main constitutions of enzymatic hydrolysate of corncobs xylans were xylobiose and xylotriose, which account for 81. 78 % and 11. 55 %. the result indicated that this xylanase was a kind of 1, 4 - b - d - xylanohydrolase and was fit to used in industrial procession of xylooligosacc harides

    進一步對xynba進行了脫糖基化處理得到xynbb ，其分子量恢復到23kd ，證明xynba是糖基化蛋白。通過對畢赤酵母重組表達的木聚糖酶xynba 、脫糖基化的木聚糖酶xynbb以及橄欖綠鏈黴菌a1所產原酶xynb之間酶學性質的比較發現：三種酶的最適ph差異不大， xynb和xynba均為5 . 2 ， xynbb為5 . 0 ； xynb和xynba的最適溫度均為60 ， xynbb降為50 ：在耐熱性上， xynba由於糖基化作用熱穩定性明顯高於未糖基化的xynb和xynbb ； xynba和xynbb的比活性分別為883 . 88iu mg和832 . 51iu mg ，明顯低於原酶的比活2814 . 45iu mg ； xynb和xynba的km值相當，分別為21 . 56 （ g kg ）和20 . 87 （ g kg ） ，而xynbb的km值較大為27 . 10 （ g kg ） ； xynba和xynbb的vmax相差不大，分別為4568 mol mg ? min和5329 mol mg ? min ，明顯低於xynb的27623 mol mg ? min此外三種酶均無纖維素酶活性，對胃蛋白酶和胰蛋白酶有很好的抗性，且對作用環境中的各種離子、表面活性劑、螯合劑不敏感。通過對不同木聚糖的酶解產物的糖份分析發現：以樺木木聚糖為底物時，酶解產物主要為木三糖和木四糖，含量分別為68 . 43和16 . 50 ，另外還含有11 . 79的木二糖；以玉米芯木聚糖為底物時，酶解產物主要為木二糖和木三糖，含量分別為81 . 78和11 . 55 。
  11. 4. a novel amperometric sensor has been constructed for the determination of h2o2. it was based on catalyzing electroreduction of hydrogen peroxide by metal hexacyanoferrate, which were electrodeposited on gold wire electrodes, under a certain potential

    利用循環伏安法，在金電極表面電化學沉積一層鐵氰酸鎳膜（ nihcf ） ，在一定電位條件下，它能快速催化還原過氧化氫，其響應電流與過氧化氫的濃度呈線性關系。
  12. In a situation that this imported product demand will also be improved further in the following several years, must optimize system this purchase, transport, load and unload, store, dredge competence of link of transporting etc., introduce the advanced idea and method on the materials supplies of expressway construction abroad, adopting more advanced modern material flow thought on the software, the pitch is provided and deliver to constructing ; develop performance excellent keeping the tank wagon warm with low costs on the hardware ; supply the barge special - purpose and in bulkly ; the special - purpose pitch shipping dock stores pot, etc. to equip, thus propose that the transport way in which our country imports the pitch is chosen, and use the economic technological demonstration method to carry on the demonstration of economic technology to these ways, therefore get our country out of and impor t the imagination of transporting way reform of pitch, propose and purchase and concentrate on and melt, transport in bulk to take the whole province or the whole country this supply platform and accord with international advanced transport suggestion of technology in unison

    在未來幾年這一進口產品需求量還將進一步提高的情況下，必須優化這一體系在采購、運輸、裝卸、貯存、疏運等環節的水平，引進國外在高速公路建設的原材料供應上的先進思想和做法，軟體上採用較先進的現代物流思想，對施工瀝青進行配送；硬體上研製成本低、性能優的保溫槽車；專用散裝供應駁船；專用瀝青裝卸碼頭貯罐等裝備，從而提出我國進口瀝青的運輸方式選擇，並運用經濟技術論證方法來對這些方式進行經濟技術方面的論證，由此提出我國進口瀝青運輸方式改革的設想，提出采購集中化、運輸散裝化這一全省或全國統一供應平臺且符合國際先進運輸技術的建議。
  13. This paper describes several latest industrial microbial technologies in detail, which are the synthesis of the chiral diols by epoxide hydrolase from microbie, cofactors regeneration for redox with fdh, production of nano / micro wire by the phage display, metabolic network rebuilding for conventional fermentation and the application of the organic solvent tolerance and the metagenomics technology

    本文綜述了幾項最新的工業微生物技術，主要包括：微生物環氧化水解酶催化合成手性二醇、微生物甲酸脫氫酶用於再生氧化還原反應的輔因子、通過噬菌體展示技術得到納米級金屬絲、代謝網路改造和重建用於傳統發酵生產以及有機溶劑耐受菌和宏基因組技術的應用。
  14. Meanwhile the qinlin mountain range also forms the border between yellow river valley in the north and the yangzhi river valley in the south, hence the region serves as a sole bridge between the qin ' s area ( representing northern china region ) and shu ' s area ( representing southern china region ), and from a geographical view, southern shaanxi province works as a channel for the remote areas in huna and hubei provinces

    正是由於陜南地區明顯地具有南北過渡、東西交匯的地理特徵，陜南地區無論是自然環境，還是經濟、社會、文化，都具有一定的典型性。所以，陜南農業經濟的開發，既可以代表南方亞熱帶稻作農業和北方暖溫帶旱作農業兩種不同的開發模式；又包涵平原、盆地、丘陵、山地四種主要地貌形態的開發特徵。
  15. Simulation results show that based on the regeneration kinetics of the catalyst, properly raising the reoxidation temperature of the catalyst in the fluidized bed reactor either can obviously improve the performance of the system or can reduce the solid flux and hence the energy consumption

    結果表明，使烴類選擇氧化（催化劑被還原）和催化劑氧化再生分開進行，特別是根據催化劑氧化再生動力學的要求，適當調節再生過程的溫度，既能明顯改善反應系統的性能，又可以大幅度降低催化劑固體顆粒的循環量，取得節能降耗的效果。
  16. My net assistant can optimize settiongs automatically, if you are an advanced user, you can optimize settings manually ; backup and restore with the optimization, the ones that can make users relaxed will resume the state before optimized, in order to ensure the system security. 2. maxmtu automatically discovery : specifies whether microsoft tcp ip will attempt to discover the largest packet size the mtu over the path to a remote computer

    1 .領先的網路優化項目，全面提升網路性能：軟體開發組通過對windows操作系統環境9x me nt 2000 xp 2003下的500臺電腦的實際評測分析，自主分析評測出絕對領先的多達29項的網路優化項目，通過智能化的自動優化向導，將網路系統參數設置得更合理，讓用戶的網路性能發揮到最高點為方便高級用戶，軟體內置了詳細的自定義手工優化系統，可以更精確的設置各個項目最安全最先進的系統同步備份與還原功能，可以讓用戶輕松的將系統恢復到優化以前的狀態，以保障系統的優化安全。
  17. Some bacteria and fungi possess the unique and extremely important biochemicalas set of beingable to catalyze the oxidation of numerous inert products, therebyinitiating reaction sequences that produce carbon dioxide and soreturn much carbon to a form that actively enters into life cycles once again

    有些細菌和徽菌具有獨特且非常重要生化特性，能作為很多不起化學變化的產物之氧化的觸媒，因而開始一些連續發生的反應；這些反應系列會製造二氧化碳，而把許多碳還原到能再一次活躍地進入生命循環的一種形式。
  18. The effect of the oxidant, the reductant, and the temperature on the performance of the adhesive were investigated

    研究了氧化劑、還原劑以及溫度對環氧丙烯酸酯膠粘劑性能的影響。
  19. The alloys exhibited good cycle performance and high capacity in the initial cycles. it was found that the reversible capacity of sn - co alloy prepared by chemical reduction retained 600mah ? g - 1 after 25 cycles

    採用化學還原法制備了sn - co合金材料，獲得了較高的容量，以及初期的良好的循環性能，容量在25次循環以內保持在600mah ? g - 1以上。
  20. Chapter 4 : nugh determinations of cyclic voltarnmetry and diff pulse voltammetry their electrochemical properties are studied. we find that each of them has nice electrochemical properties and reversible redox properties. whereaftef, we obtain some beneficiai conclusions via comparison and analysis

    第四章對它們的電化學活性進行了研究，通過循環伏安法，差分脈沖伏安法測試，發現該系列化合物都具有電化學活性，且具有良好的氧化還原可逆性。
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