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乙酯

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Among 3 cultivars, B17 occupied the least green odor contents of aromatic constituents, such as 2-hexen-1-ol acetate, butanoic acid 3-hexenyl ester and butanoic acid 3-hexenyl ester, hut had the most fruity, flowery and woody odors such as β-Ionone, 1-nonanol, Acetic acid octyl ester, Methyl benzoate, Ethyl benzoate and theaspirane, which showed that B 17 was superior to the 2 other cultivars in aroma quality.

不同品种的杨桃果实中的所含的香气成分及含量不同,B17杨桃含乙酸-反-2-己烯酯、丁酸-反-2-己烯酯、丁酸-反-3-己烯酯等青香型酯类最低而含β-紫罗兰酮、1-壬醇、乙酸辛酯苯甲酸甲酯、苯甲酸乙酯、茶螺烷等花香型、果香型及木香型成分最高,因而其香气品质要优于B10和新加坡红肉种。

After the clean version with ethyl mixtrue: such as: aminomethylbenzoic (8: 2), ethhyl: aminomethylbenzoic: ketone (7: 2: 1) in respect of problem-solving abilities, but here's a question is: If you use ethhyl, aminomethylbenzoic can be solved, it is best not butanone, because ketone residues of odoural a stronger, it may be on the cards and membership cards the quality of the production.

把版洗肮脏后用混分溶剂:如乙酯:甲苯(8:2)、乙酯:甲苯:丁酮(7:2:1)不离灵验不天处置题纲,但这里给夺纲的一个题纲是:如果用乙酯、甲苯能处置时,最坏务必丁酮,因为丁酮的残留气息较淡,不定差制卡和会员卡制息品的质度有感化。

The addition of water to reduce alcohol content in liquor would produce white floc .

在低度白酒生产过程中,白酒加水降度时,会产生白色絮状沉淀,沉淀物主要是棕榈酸乙酯、油酸乙酯和亚油酸乙酯

Solani. The extract was further separated into two parts and one part separated by ethyl acetate while the other was separated by petroleum ether. Based on the inhibition experiment against R. solani, ethly acetate extract has a rather strong effect on R. solani with 89.70% inhibition rate and 15.52 mgmL^(-1) EC 50.The effect of petroleum ether extract on R. solani is relatively weak. The former was again divided into five parts in silica gel column, of which the second part significantly inhibits R. solani. During the periods of 24 and 48 hrs, the inhibition rate of the second part on R. solan is respectively 89.58% and 80.36%.

结果表明:鸭粪乙醇提取物对水稻纹枯病菌有抑制作用,24h内最高菌丝生长抑制率和EC50分别为88.64%、26.11mgmL^(-1);鸭粪乙醇提取物经萃取分离得到石油醚和乙酸乙酯两种组分,其中石油醚组分抑菌效果较弱,乙酸乙酯组分抑菌能力较强,其对水稻纹枯病菌抑制率为89.70%,EC50为15.52mgmL^(-1);对乙酸乙酯组分进行硅胶柱层析分离得到5种流份,其中第2流份有显著抑菌活性,在24h和48h内对水稻纹枯病菌的抑制率分别为89.58%和80.36%。

Products: 3 - benzoyl-ethyl acrylate (97% min), acyl phosphorus acid methyl ester (98% min), P acyl three ethyl acetate (98% min), a phosphorus acid acyl The ethyl esters (98% min), 3 - bromine -1,3,4,5 - tetrahydrocannabinol -2 H-1-benzo-Aza Zhuo -2, 1 - naphthalene-tetrahydrocannabinol (98% min), 3,5 - dimethyl benzoyl chloride (99% min), 3,5 - dichloro benzoyl chloride (97% min), the ethyl benzoyl chloride (99% min), a TCA Ester (99.5% min), o-benzoyl methyl benzene (99% min), 4 - phenyl benzophenone (99% min): glacial acetic acid (99% min), methanol (99% min), liquid chlorine (99.5% min), caustic soda (30% min), isopropyl alcohol (99% min), anthranilic acid (99% min), dichloroethane (99% min ), Chunben (99% min), toluene 99% min

3-苯甲酰基丙烯酸乙酯(97%min)、磷酰基乙酸三甲酯(98%min)、磷酰基乙酸三乙酯(98%min)、磷酰基乙酸甲酯二乙酯(98%min)、3-溴-1,3,4,5-四氢-2H-1-苯并氮杂卓-2酮、1-四氢萘酮(98%min)、3,5-二甲基苯甲酰氯(99%min)、3,5-二氯苯甲酰氯(97%min)、对乙基苯甲酰氯(99%min)、氯乙酸甲酯(99.5%min)、邻苯甲酰基苯甲酸甲酯(99%min)、4-苯基二苯甲酮

The extracting ability of several organic solvents such as ethyl acetate, butyl acetate, glycerol triacetate, iso-amy lacetate, and n-butanol, was compared, and it was found that ethyl acetate was a good kind of organic solvent.

比较了几种不同的有机溶剂:正丁醇、乙酸丁酯、乙酸乙酯、三乙酸甘油酯、乙酸异戊酯等的萃取能力,发现乙酸乙酯是一种理想的提取溶剂。

In addition, there were also some special aromatic substances such as 1-nonanol, hexanoic acid 2-hexenyl ester, propanoic acid 2-hexenyl ester, butanioc acid 3-hexenyl estertrans-2-hexenyl valerate, theaspirane, gerenylacetone, methyl benzoate and ethyl benzoate.

此外还含有一些少量的1-壬醇、己酸-2-己烯酯、丙酸-反-2-己烯酯、丁酸-反-3-己烯酯、戊酸-反-2-己烯酯、茶螺烷、香叶基丙酮、苯甲酸甲酯、苯甲酸乙酯和乙酸辛酯等。

The strongly acidic cation exchange resin catalyzed synthesis of fructone-B by the reaction of ethyl acetoacetate and 1,2-propanediol was studied.

以硫酸高铈铵为催化剂,通过乙酰乙酸乙酯分别与乙二醇和1,2-丙二醇反应合成了苹果酯-A和苹果酯-B,研究了催化剂等有关因素对产品收率的影响。

Water,propylene glycol,butylene glycol,glyceryl polymethacrylate,ascorbic acid,peg-7 glyceryl cocoate,biosaccharide gum-1,peg-40 hydrogenated castor oil,ppg-26-buteth-26,phenoxyethanol,hydroxyethylcellulose,xanthan gum,methylparaben,pentadecalactone,citrus aurantium dulcisoil,disodium edta,sorbic acid,tocopheryl acetate,butylparaben,retinyl palmitate,iris germanica root extract,sodium hyaluronate,ethylparaben,propylparaben,citrus aurantium amara oil,limonene,linalool

水,丙二醇,丁二醇,甘油聚甲基丙烯酸酯,维生素C衍生物,PEG-7 椰子油酸单甘酯,多醣物质,PEG-40氢化蓖麻油,PPG-26-丁醇聚醚-26,苯氧乙醇,羟乙基纤维素,山羊胶,羟苯甲酯,环十五内酯,甜橙油,乙酸乙二胺二钠,山梨酸,醋酸盐维他命E,羟苯丁酯,维他命A酯,鸢尾花根萃取,透明质酸钠,羟苯乙酯,羟苯丙酯,苦橙油,柠檬精油,芳樟醇

Ethoxycarbonyl-4,5-dimethyl-pyrrole (7) was prepared from ethylacetoacetate, ethyl formate and methyl ethyl ketone via oximination, Claisen condensation, and reductive condensation. The bromization of compound 7 gave 2-ethoxycarbonyl-3-bromo-4,5-dimethyl-pyrrole(8), which could be transferred to 2-ethoxy-carbonyl-3-brome-4-methyl-5-formyl-pyrrole (9) by the formolation.

由乙酰乙酸乙酯、甲酸乙酯及丁酮等原料经过肟化、Claisen缩合、还原缩合成环得到2-乙氧羰基-4,5-二甲基-吡咯(7),溴化生成2-乙氧羰基-3-溴4,5-二甲基-吡咯(8),最后经过甲酰化反应得到目标产物2-乙氧羰基-3-溴-4-甲基-5-甲酰基-吡咯(9)。

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