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ResultsThe IC50 of the ethyl acetate extract from Alocasia macrorrhiza to A549, B16, BGC-823 were 94.6, 541.9,629.5 μg·ml-1 respectively,and those of the acetone extract from Alocasia macrorrhiza to A549 and B16 40.9,438.0 μg·ml-1 respectively. But there were quite large dosages of the IC50 of the extracts of cyclohexane, benzine, ethyl alcohol and water from Alocasia macrorrhiza to all kinds of cell lines.

结果海芋醋酸乙酯提取物对A549，B16，BGC-823的IC50分别为94.6， 541.9，629.5 μg·ml-1，丙酮提取物对A549，B16的IC50分别为40.9，438.0 μg·ml-1，而海芋的环己烷，石油醚，乙醇，水提物对各种细胞株的IC50剂量都比较大。

In the leaves, the mesophyll cells surrounding the vascular bundles contain the carbon dioxide-fixing enzyme phosphoenolpyruvate carboxylase in their cytoplasm.

在叶片中，叶肉细胞包围着维管束，叶肉细胞细胞质中所包含的磷酸烯醇式丙酮酸羧化酶，具有比核酮糖二磷酸羧化酶更高的的与二氧化碳的亲和力。

As well as activity was exhibited. Theaddition of cinchonidine led to a remarkable increase in the reaction rate, as confirmed bythe IR study that the modifier activates the carbonyl groups of the reactant through itsquinuclidine nitrogen. On the contrary,〓 exerted a strong inhibition effect on theenantioselective hydrogenation. Chapter 3 Finely dispersed polyvinylpyrrolidone-stabilized iridium andbimetallic clusters were prepared by the alcohol-water reduction method.

第三章 采用醇水还原的方法制备了聚乙烯基吡咯烷酮稳定的铱纳米簇及双金属纳米簇，对丙酮酸甲酯的催化氢化表明，在铱金属簇催化体系中，辛可尼定不仅诱导了一定的对映选择性，同时对反应活性有明显的促进作用，平均反应速率可提高2-6倍。

Some bacterial species, because of the chemical nature of their cell walls, have the ability to retain the crystal violet even after the treatment with an organic decolorizer such as a mixture of acetone and alcohol.

革兰氏染色可以区分二种类型的细菌之细胞壁，有些细菌因其细胞壁的化学特性，能在如丙酮或酒精等脱色剂的处理后，仍能够保留结晶紫的颜色

The results of comprehensive evaluation indicated that the effect of the suitable concentration extracts were better, the effect of Ether extract 1000mg/L

提取物浓度与抗寒效果之间无明显的相关性，植物材料前胡的抗寒作用可能是前胡乙醚、丙酮、三氯甲烷等提取物中一种或多种成分的诱导和保护作用的共同结果。

At lower temperature, the interaction between the Ir particles and the adsorbed ethoxyl species is not strong enough to abstract H atom from the nearby CH3 group, and thus acetaldehyde acts as the key intermediate. Acetaldehyde can decompose to methane and CO and/or convert to acetone through decarbonylation.

低温时Ir粒子与吸附的乙氧基的相互作用的强度不足以从-CH3基团中提取H原子，此时乙醛是关键的反应中间物，乙醛可以裂解生成甲烷和一氧化碳或脱羰基生成丙酮。

Cephalotaxine ester of 2-oxo-6-methylheptanoic acid was treated with lithium diisopropylamide and Me O-(1-methoxyisopropyl)glycolate to give a mixture of homoisoharringtonine and its stereoisomers with 56% yield. The four stereoisomers separated by TLC showed identical mass spectra and almost superimposed IR but with different 1H NMR spectra. The configuration of the 2'-C and 3'-C of the four isomers were postulated based upon their 1H NMR spectra as compared with the 1H NMR spectra of isoharringtonine and its stereoisomers.

2-氧代-6-甲基庚酰基三尖杉碱(3)与0-(1-甲氧基异丙基)羟基乙酸甲酯(4)在强碱性试剂二异丙胺锂存在下，起亲核加成反应，反应中间体5在室温用酸性丙酮水解，得到一种新的三尖杉酯类生物碱一一高异三尖杉酯碱(6c)及其立体异构体(6a、6b、6d)的混合物，产率56%、通过制备薄层层析分得这四个立体异构体，它们的1H NMR和异三尖杉酯碱及其立体异构体的1H NMR类似，推定了它们的绝对构型。

MMA is produced by the method of acetone-cyanhydrin mainly in our country. The synthetic route is complex, the technical line is long, and the yield is low with high cost after many steps. Hydrocyanic acid is used as raw material, the treatment of numerous waste acid is difficult . Furthermore, concentrated sulfuric acid consumed in this method corrodes equipments and pollutes the environment seriously.

我国MMA的生产以丙酮腈醇法占主导地位，合成路线复杂，生产工艺长，多步反应后产率低，成本高，其采用有剧毒的氢氰酸为原料，产生大量难于处理的废酸，所消耗的浓硫酸对设备腐蚀性大，对环境污染严重，因此开发新的MMA工艺路线很有必要。

Macerate 1.0g of the powdered sample with 20.0 ml of chloroform plus 0.3ml of 25％ NH_4 OH in a glassstoppered flask overnight.

本文报道用不含粘合剂的氧化铝薄层，以二甲苯-丙酮-无水乙醇-二乙胺(50：40：10：0.6)为展开剂分离茄科植物中的莨菪碱、东莨菪碱、山莨菪碱、樟柳碱及红古豆碱等五种莨菪烷生物碱，用改良Dragendorff试剂-Wagner试剂(1：1)显色，定量收集莨菪碱、东莨菪碱及山莨菪碱的斑点，莨菪碱和东莨菪碱用氨甲醇洗脱，蒸干洗脱液后分别用pH 5.6及pH 4.5的溴甲酚绿溶液作比色测定；山莨菪碱用4％醋酐氯仿洗脱，蒸干洗脱液后用pH 5.6的溴甲酚绿溶液作比色测定。

Methacrylic Acid is one of the most important organic materials, and there is large demand indomestic and international market. The traditional preparation method of MAA has lots of limitation suchas high cost, huge pollution, and virulent raw materials. So its necessary to search a new green route toreplace the ACH route.

甲基丙烯酸是一种重要的有机化工原料，目前国内外对MAA的需求量很大，而传统的丙酮氰醇法制备MAA存在成本高、环境污染大、原料剧毒等缺点，所以需要寻找一条新的绿色工艺路线代替传统工艺。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。