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The auxiliary can be recovered in high yield (81%) only by filtering and recrystallization. Besides, some other aldehydes have been chosen to test the enantioselectivity of N,N\'-dibenzyl tartamide, in comparison with two other allylaborates reagents developed previously by Roush and Brown, respectively. The results show that %e.e. of homoallylic alcohol is superior to that of the former, and approaches the Brown reagent.
产物经S_N2反应得瑞格列萘中间体-甲基烯丙基-2-氯苯基-叠氮甲烷(17);同时,将筛选出的新型手性配体N-苄基酒石酸二酰胺用于其他几种醛(正丁醛,异戊醛和环己醛)的不对称烯丙基化反应,并与广泛应用的Roush配体(22)和Brown配体(27)相比较,发现其立体选择性优于Roush配体,并接近Brown配体,但明显具有可回收利用的优势。
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Results Influence of microwave technique on the amount of rutin was superior to the general decocting method.
结果:微波技术对槐花中芸香甙的浸出量明显优于常规煎煮方法。
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In addition, selected because of the Tianshan Mountains, Xinjiang safflower oil, such as accessories, the products a more prominent role in lipid-lowering, and its health is superior to similar products in Japan.
并且,由于选用了新疆天山红花油等辅料,该产品的降脂作用更加突出,其保健功效优于日本同类产品。
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The Safflower treatment group was better than the Danshen treatment group with significant difference.
两组比较红花治疗组优于丹参治疗组,差异有统计学意义。
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The cells of 2~ passage were used for proliferation kinetics studying by MTT colorimetric method.The pasagcd chondrocytes' phenotypes were as- sessed by safranine O staining and immunostaining for typeⅠ,Ⅱcollagens and aggrecan.Results For in vitro culturing of AHAC,human AB serum was superior to FBS,and the optimal concentration of human serum was 10%.But for FBS,20% was better,A similar result was got with or without the growth factors contained.
结果对于AHAC,人AB血清培养优于FBS;合适的人AB血为10%;合适的FBS浓度为20%;无血清培养细胞增殖非常缓慢;不加因子用人AB血清培养细胞梭形化明显,加用生长因子后与使用FBS在形态上一致。
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Experiment shows it is perfect to classify study sample itself by the kernel function in this thesis, and the generalization ability of it is more predominant than SVM of traditional one.
实验表明了本文的核函数对学习样本本身的分类良好,而且泛化能力优于传统的核函数的SVM。
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The experimetal results show that the flexural moment of the sample in the prebending direction is far bigger than that in the vertical direction to pre-bending and the spherical shape can be conquered during pre-loading laser peening forming to a great extent.
试验结果表明,在弹性预加载下,板料在弹性预弯方向获得的弯矩要比与弹性预弯垂直方向上的弯矩大得多,弹性预加载下激光喷丸成形可以有效地克服自由状态下激光喷丸件呈球形现象,激光喷丸件的曲率是自由状态下激光喷丸成形曲率的2~3倍;在相同曲率下,弹性预加载下激光喷丸成形件的表面粗糙度比自由状态下激光喷丸成形件的表面粗糙度要低1~2等级,因此弹性预加载下激光喷丸成形要优于自由状态下的激光喷丸成形。
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The multiple corresponding analysis is suitable for correlation analysis of big sample categorical variable.
对于中医研究中常见的无序多分类或二分类变量,要同时研究它们之间的联系,用多重对应分析在结果的直观性和可解释性方面优于对数线性模型。
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The lower computers of the system are multi-microprocessors with AC sampling,and the ratio of prolierty to price is bigger than that of the single function system.
下位机为多主CPU微机,交流采样。系统的性能价格比优于单功能装置。
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Because the sapogenin wastewater is highconsistency organic wastewater,we developed the twophase anaerobic digestion with three stages that acidification phase, inner electrolysis phase and methane phase.
开发了三阶段两相厌氧工艺即酸化、内电解、厌氧产甲烷的工艺处理皂素废水。从理论上分析了该工艺处理黄姜皂素废水的机理和优势。在实验条件相同时,改变内电解在工艺中的位置进行间歇式厌氧处理,测得2种厌氧工艺的处理效果。实验结果表明内电解在两相厌氧中间CODC r的去除率要优于内电解在酸化前
- 推荐网络例句
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On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.
另一方面,更重要的是由于城市住房是一种异质性产品。
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Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.
气候直方图是将所收集的降水量测定值,分为几个相等的区间作为横轴,并将各区间内所测定值依所出现的次数累积而成的面积,用柱子排起来的图形,也叫做柱状图。
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You rap, you know we are not so good at rapping, huh?
你唱吧,你也知道我们并不那么擅长说唱,对吧?