ring reaction 中文意思是什麼
ring reaction
解釋
環狀反應-
Using sodium dicyandiamide and saccharin as raw materials, tribenuron - methyl is synthesized via ring - opening reaction, phosgenation and condensation with total yield of 57. 0 % and product purity of 95. 6 %
以雙氰胺鈉和糖精為起始原料，經過開環、光氣化、縮合等一系列反應制備了苯磺隆，合成反應的總收率可達57 . 0 %以上，純度可達95 . 6 %以上。 -
Lorazepam was synthesized by the following seven steps : condensation reaction ( 1 ), condensation reaction ( 2 ), cyclic reaction, ring expanding reaction, acylate reaction, hydrolysis reaction and refining
摘要詳細設計了勞拉西泮的合成路線，主要過程有縮合反應（一） 、縮合反應（二） 、環合反應、擴環反應、酰化重排反應和水解反應。 -
The reaction of threshold on linewidth of ring ' s output light is pointed out. this provides a new auxiliary method to determine the threshold
最後提出一種利用有源腔內ase輸出光的線寬變化特徵來判斷有源光纖環形腔閾值點的輔助方法。 -
The reaction pathways were proposed as follows : firstly, hydroxylation of aromatic ring, then ring cleavage forming dicarboxylic acid and eventually oxidation to inorganic carbon
其機理為：首先是苯環羥基化，然後環破裂生成二元羧酸，最後二元羧酸氧化降解為二氧化碳和水。 -
Exhibits include " magnetic chain reaction ", " invisible forces ", " giant magnet ", " black magic " and " jumping ring "
展品包括磁力連鎖反應無形之力巨型磁鐵黑魔術及跳躍環等。 -
The influence of catalyst on the copolymerization of epoxy and cyanate was investigated, and the mechanism of their copolymerization was discussed. the catalyst can obviously accelerate the curing of the resin to decrease the curing temperature. the three kinds of reactions ( cyclotrimerization, co - reaction and polyetherification ) in their copolymerization are not simultneous and independent to each other. in the lack of cyanate functional group, the main structures are oxazoine and polyether structure in the cured resin, and the triazine ring structure is of miner importance
研究了催化劑對環氧樹脂與氰酸酯樹脂的共聚固化反應行為的影響，並初步探索氰酸酯/環氧固化的反應歷程.研究表明，催化劑能明顯地促進其固化反應，降低固化溫度，縮短固化時間；氰酸酯與環氧共聚反應歷程是首先氰酸酯三聚反應生成三嗪環結構，然後三嗪環開環與環氧共聚反應，最後是未能參與共聚反應的環氧官能團在唑啉結構和三嗪環的催化下發生聚醚化反應；在氰酸酯官能團欠量的條件下，固化樹脂中主要是唑啉和聚醚結構，而三嗪環結構的含量很少 -
As the content of vermiculite minerals increased, the content of the " intercalated " shape, in which crystal gallery breadth was about of 40nm, also increased. in the curing reaction processing of polybenzoxazine / vermiculite hybrid nanocomposites intercalated with bisphenol a type precursor. according to the content of vermiculite minerals, while different shape of crystal was forming, these crystals were retarding the heat ring - opening polymerization of bisphenol a type precursors in the nanocomposites
通過對雙酚a型ben蛭石納米插層物固化過程的分析：不同蛭石含量的插層物，在形成不同納米分散狀態固化結構的過程中，蛭石晶片對雙酚a型ben的熱開環聚合有明顯不同的阻礙作用，蛭石含量為3的插層物160的凝膠化時間較純樹脂的延長約7min ，活化能高約8kj mol ，固化反應熱晗低約14j g ，使得固化物的固化程度較純樹脂低約10 ，阻礙作用最大，其它含量的次之。 -
The results showed that its yield was inversely proportional to the concentration of - amylase and reaction time when the maize starch was hydrolyzed by - amylase ; the granular maize starch was converted into hollow - porous starch by ct - amylase, furthermore it was cracked to the fragments, it was discovered that there were laminated growth ring structure inside starch granular shown on such cracked granular fragments ; the crystallinity of maize starch granule can not he increased by the enzyme hydrolysis ; the thermodynamic stability of the product was reduced when the hydrolysis time was long
檢測結果表明， -澱粉酶催化水解玉米澱粉時，其收率與酶的濃度和反應時間成反比；顆粒狀玉米澱粉發生酶催化水解時， -澱粉酶首先使澱粉形成多孔狀結構，並進一步使顆粒破裂，斷裂的顆粒碎片上顯示出澱粉顆粒內部具有層狀的生長環結構；酶催化水解不能提高玉米澱粉顆粒的結晶度；酶解時間較長時，產品的熱穩定性降低。 -
Mirtazapine was prepared by a seven - step reaction, namely nucleophilic ring - opening reaction, chlorination, cyclization, uncleophilic substitution, hydrolysis, reduction and cyclization from styrene oxide and n - methylethanolamine as the starting materials, with overall yield of 22. 6 %
摘要以環氧苯乙烯和n -甲基乙醇胺為起始原料，經親核開環、氯代和環合反應得到中間體1 -甲基3 -苯基哌嗪。 -
Nucleophilic ring opening reaction of unsymmetric aziridines and its regioselectivity
非對稱氮雜環丙烷的親核開環反應及其區域選擇性 -
Four - member ring and six - member ring mechanisms have been studied, both of which have three reaction paths with the main path through two - step transition state
探討了四元環和六元環機理，其中每種機理有三種途徑，主要的途徑是經過過渡態的兩步反應途徑。 -
Most proteins have amino acids with aromatic ring, so they have yellow reaction. phenylalanine is not easy to nitrify, so it is necessary to add in a little vitriol oil
多數蛋白質分子含有帶苯環的氨基酸，所以都會發生黃色反應。苯丙氨酸不易硝化，需加少量濃硫酸后才能夠發生黃色反應。 -
The computerized molecular modeling of the structure of cyclic glycerothiophospholipid conjugate and reaction mechanism of opening - ring
計算機模擬環甘油磷脂結構及其開環反應機理研究 -
All above results show that the reaction experiences the six - member ring transition state with two - step path
這表明該反應主要經歷六元環過渡態的兩步反應歷程。
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