乙酸乙酯

The fungicidal activity of methanol extract was higher than that of ethyl acetate extract, and the inhibition rates were higher than 90% against Alternaria longipes, Fusarium oxysporium, Gibberella zeae, Glomerella cingulata, Exserohilum turcicum under the concentration of 1000g/mL The results of the inhibition of spore germination indicated that the fermentation products exhibited obvious inhibition rate against Alternaria longipes, Exserohilum turcicum and Fusarium coeruleum, the EC50 values was 59.4g/mL, 96.5g/mL and 132.5g/mL. In the bioassay of the fermentation products against Bacillus sub tills and Bacillus cereus, by means of detection fo inhibition zone, the inhibition zone diameter was 20mm and 27mm. The results of pot tests that methanol extract showed higher than 70% of protective efficacy and therapeutic efficacy against wheat powdery mildew under the concentration of 2000g/mL.

其中，甲醇提取物的抑菌活性比乙酸乙酯提取物强，在1000g/mL浓度下对烟草赤星病菌、马铃薯干腐病菌、小麦赤霉病菌、苹果炭疽病菌、玉米大斑病菌的菌丝生长抑制率均大于90%；抑制孢子萌发法试验结果表明，2K3菌株菌丝体的甲醇提取物对烟草赤星病菌玉米大斑病菌和马铃薯干腐病菌的EC50分别为59.4g/mL、96.5g/mL和132.5g/mL；管碟法生测结果表明，2K3菌株菌丝体的甲醇提取物对枯草芽孢杆菌和蜡状芽孢杆菌的抑菌圈直径分别为20mm和27mm；盆栽试验结果表明，2K3菌株菌丝体的甲醇提取物在2000g/mL浓度下对小麦白粉病的治疗和保护作用均在70%以上。

In this paper,extraction velocity of TP during the process of TP production using Fluid Globelet Ascendingwas studied.

本文采用上升液滴法研究了有机相乙酸乙酯单液滴在萃取茶多酚过程中的速率。

The fungicidal activity of methanol extract was higher than that of ethylacetate extract. The bioassay showed that the methanol extracts of strain As fermentation products had certain degree fungicidical activity against Botrytis cinerea, Alternaria longipes, Glomerella cingulata, Curvulavia lunata, Gibberella zeae, Valsa malt under the concentration of 4000μg/mL, the inhibiting ratio against pathogen growth was ranging from 62.9%~85.1%; The results of the inhibition of spore germination indicated that the fermentation products exhibited obvious inhibition rate against Alternaria longipes, the EC50 values was 62.5328μg/mL; The bioassay showed that the methanol extracts of strain As fermentation products had certain degree fungicidical activity against Bacillus cereus , Bacillus subtilis.

其中甲醇提取物的抑菌活性较乙酸乙酯好，在4000μg/mL浓度下对番茄灰霉病菌、烟草赤星病菌、苹果炭疽病菌、玉米弯孢叫斑病菌、小麦赤霉病菌、苹果腐烂病菌6种植物病原真菌均有抑制作用，抑制率在62.9%~85.1%；抑制孢子萌发试验表明：菌丝体甲醇提取物对烟草赤星病菌的毒力较好，其EC50仅为62.5328μg/mL；抑制细菌活性表明菌丝体甲醇提取物对蜡状芽孢杆菌和枯草芽孢杆菌有一定的抑制作用，而对大肠杆菌无明显的抑制作用。

When hydrochloric acid was added into saccharin sodium solution,chemical reaction happened,whose product was glucide,which cannot be dissolved in water,however,it can be dissolved by ethyl acetate,therefore glucide can be extracted from other components,then can be determined by titration with sodium hydroxide.

利用糖精钠与盐酸反应生成不溶于水而溶于乙酸乙酯的物质，将其萃取出来，然后再利用氢氧化钠对其进行滴定分析，采用二分试差法准确测定了某镀光亮镍添加剂中糖精钠及某镀光亮镍液中糖精钠的含量，分别为88。

The hypha growth-inhibiting method and the virulence determination method were used to investigate the inhibition effects of the petroleum ether fraction, chloroform fraction, ethyl acetate fraction, n-butanol fraction and water fraction in the alcoholic extracts from the aboveground of Peganum harmala L.

采用抑制菌丝生长法和毒力测定法，研究了骆驼蓬地上部醇提物的石油醚、氯仿、乙酸乙酯、正丁醇和水5个极性部位对南瓜枯萎病菌、西瓜枯萎病菌Fusarium oxysporum f。

The twig of Lagerstroemia floribunda Jack were extracted with ethanol and isolated with silica gel column chromatography.

多花紫薇的枝经乙醇冷浸提取，依次用石油醚、乙酸乙酯和正丁醇萃取。

The stem barks of Lagerstroemia calyculata Kurz were extracted with methanol and isolated with silica gel column chromatography.

副萼紫薇的茎皮经甲醇冷浸提取，依次用石油醚、乙酸乙酯和正丁醇萃取。

Objective the chemical constituents of the ethyl acetate extract of Lagerstroemia reginae Roxb, Lagerstroemia calyculata Kurz and Lagerstroemia floribunda Jack were studied in this research.

目的：本研究对大叶紫薇、副萼紫薇和多花紫薇乙酸乙酯萃取部分的化学成分进行研究。

In Laurencia cartilaginea, nine compounds (compoundsl-9) have been isolated and identified from the extraction of EtOAc fraction.

从软骨凹顶藻Laurencia cartilaginea乙醇浸提液的乙酸乙酯部分分离得到8个单体化合物和一组甾醇混合物(化合物1—9)，并通过IR、~1H-NMR、~(13)C-NMR、EI-MS、GC-MS、FAB-MS、ESI等波谱技术进行鉴定。

Method］Raw material was extracted by 50% ethanol,then purified by acetic ethyl.The extract was injected into LC/MS after filtering with micromembrane.

方法］叶下珠药材，以50%乙醇提取，乙酸乙酯萃取，萃取液过微孔滤膜后，采用LC/MS对各成分分离鉴定。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。