反应率

XRD, EDS, ETIR and SEM reveal the precipitate obtained from YN23-inoculated flasks to be a mixture of potassium jarosite and ammoniojarosite, with morphological features similar to the latter.

接种25h后，当Fe(上标 2+)氧化率达到90%时，开始出现沉淀，pH也达到1.92的最高值；到第95h，当沉淀累积到7.9gl^(-1)，时，沉淀反应停止，此时pH达到1.32的最低点。

Conclusions— In cardiac hypertrophy, fatty acid oxidation rates are reduced, whereas compensatory increases in anaplerosis maintain tricarboxylic acid cycle flux and account for a greater portion of glucose oxidation than previously recognized.

心脏肥大时，脂肪酸氧化率降低，更大部分的葡萄糖氧化来保持三羧酸循环通量的补偿反应增加，这是以前没有认识到的。

Transmembrane action potentials were recorded simultaneously from endocardium, epicardium, together with a transmural ECG, in arterially perfused left ventricular preparations by use of 2 separate intracellular floating microelectrodes. The stimulus-response- interval of the epicardium and the incidence of ventricular tachycardia were observed as well.

灌流全程同时采用浮置玻璃微电极法同步记录内膜下心肌、外膜下心肌跨膜动作电位和跨壁ECG，并观察心外膜下心肌的刺激反应间期(Stimulus-response-interval， SRI)和室性心动过速的诱发率。

The effects of catalyst dosage, the amounts of hydrogen peroxide and phase transfer agent, the pH value of the solution, the reuse of catalyst and the reaction temperature on the azelaic acid yield were investigated.

以30%过氧化氢作为氧化剂，在相转移试剂和磷钨酸催化剂作用下催化油酸制备壬二酸，考察了催化剂磷钨酸用量、过氧化氢用量、溶液pH值、相转移试剂用量、反应温度等因素对壬二酸产率的影响。

The known titanoheterocyclic compound〓 was synthesized in high yield by a new route involving an oxidative addition reaction of "titanocene"with benzil, and its structure was first confirmed by a single crystal X-ray diffraction method.

首次由&二茂钛&与二苯乙二酮的氧化加成反应，高产率地合成了一个已知的高价钛杂环化合物〓，并首次用X-射线衍射法测得该化合物的单晶分子结构。

2,7-di-diphenylamine-spiro[fiuorene -7,9'-benzofluorene] was successfully synthesized .Its structure was determined by 1HNMR、MS、IR and Elemental Analysis.Yield of each reaction was more than 70%.

设计并合成了一种新型的含二苯胺基团的螺芴化合物2，7-双二苯胺-螺环-[芴-7，9'-苯并芴]，并通过了1HNMR、MS、IR、元素分析图谱检验，每步反应的产率均在70%以上。

Quinone methides, generated in situ from the reaction of 4-hydroxycoumarin with benzaldehyde, formaldehyde and pentanal, underwent the Diels-Alder reaction with silyl enol ethers to give a series of 3,4-dihydro-2H,5H-pyrano[3,2-c][1]benzopyran derivatives in high yields.

通过4-羟基香豆素与苯甲醛、甲醛和戊醛缩合产生的quinone methide与烯醇硅醚的Diels-Alder反应，以较高产率合成了一系列含有硅氧基的3，4-二氢-2H，5H-吡喃并[3，2-c][1]苯并吡喃-5-酮衍生物。

Benzothiophene was selected as model sulfide and dissolved in n-octane to form model diesel, hydrogen peroxide/formic acid/sulfuric acid were used as the oxidative system.

在苯并噻吩／正辛烷配成的模拟柴油中，以过氧化氢／甲酸／硫酸作氧化脱硫体系，考察了硫酸的催化性能以及反应条件对氧化脱硫率的影响。

The alkali dosage depends mainly on the constituents and property of material and the quality requirements for pulp: more alkali dosage will speed up cooking process, reduce the hardness of pulp and improve the bleachability of pulp; but excessive alkali dosage will lower the pulp yield and physical intensity, while too less alkali dosage will result in harder and darker pulp, uneasy to bleach, too much screenings, and even extending cooking time cannot guarantee the reaction of delignification.

用碱量主要取决于原料的组成和性质及对纸浆的质量要求：加用碱量有利于加快蒸煮速度降低纸浆硬度和提高纸浆的可漂性：但过高却会降低纸浆得率和物理强度，如过低时，成浆较硬而色暗，不易漂白而且筛渣多即使延长蒸煮时间也难以保证脱木素反应进行。

Pd(PPh3)4 is more reactive for boronic acids with steric hindered F atom and no self-coupling by-product, and coupling reactions gave good yields of 90% and 91%.

Pd(PPh3)4对于含有位阻F原子苯硼酸的偶联反应很具有活性，且没有自偶联产生，产率可达90%及91%。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。