查询词典 petroleum ether

We remember that the velocity of light in vacuo, or in other words, in ether, is 186,000 miles per second and that light is an electromagnetic wave spreading through the ether.

我们记得在真空中，或者说在以太中，光的速度是3.0×10^5公里每秒，而光就是在以太中传播的电磁波。

At first, the broth was acidified, then centrifuged to get mycelia, which was heated and powdered; finally we use acetic ether to soak the powder. After that, the phase of acetic ether was washed using the solution of ammonium sulfate and the solution of ethanedioic acid, then concentrated to gain pulps. It was crystallized at 4℃.The coarse crystals was decolorized by activated carbons, the pure needle crystal of lovastatin was obtained.

发酵液经酸化处理后，离心得到菌体，烘干后过筛得到菌粉；用乙酸乙酯浸泡，乙酸乙酯相需用(NH_4)_2SO_4溶液和草酸溶液洗涤两次；乙酸乙酯相经薄膜浓缩得到浆状物，于4℃结晶，得到粗晶体；再经粉末活性炭脱色和重结晶后得白色针状结晶，为lovastatin的纯品。

The paper suggests that the extraction of petroleum ether, polysaccharide and sodium copper chlorophyllin from banana leaves can be exploited as dishware abluent or abluent–assistants.

因此，从泡沫性能、表面张力、去污力三个方面，本研究认为香蕉叶石油醚抽出物、叶多糖和叶绿素铜钠盐可以开发作为餐具洗涤剂或洗涤助剂。

An aliquot of the alcohol solution was taken and further extracted with petroleum ether.

分取部分此乙醇溶液用石油醚萃取，使叶绿素溶入石油醚中。

A suitable method for extraction of amygdalin from hawthorn has been established. At first, the lipophilic components were removed with petroleum ether by ultrasonic extraction.

建立了从山楂中提取苦杏仁甙的方法，样品先用石油醚脱脂，然后用甲醇进行索氏提取。

It is reported the effect of extracted fungicide from composite, chenopod , legume, rosaceae , euonymus , labiate , rutaceae and asclepiad with water, ethyl alcohol and petroleum ether, to Valsa Mali Miyabe et Yamada .

就菊科、藜科、豆科、蔷薇科、卫矛科、唇形科、芸香科和萝摩科的 10种不同植物组织的水、乙醇和石油醚浸出物对苹果腐烂病原的抑制作用进行了研究，并比较了以中草药为原料制成的膏状制剂对苹果腐烂病的防治效果。

And Bauhinia purpurea could inhibit vibrio. And the extracts, extrated with petroleum ether from leaves of Melia azedarach L. and Bauhinia purpurea can inhibit Vibrio parahaemolyticus, too. The remainder extracts of Mangifera indica Linn.showed strong inhibition effect on Vibrio tubiashii. While the extracts of Eriobotrya japonica showed no inhibition effect.

结果 夹竹桃叶、芒果叶、苦楝叶和羊蹄甲叶4种中草药乙酸乙酯萃取部分对供试弧菌有很好的抑菌作用；苦楝叶和羊蹄甲叶石油醚萃取部分对副溶血弧菌有抑菌作用；芒果叶的水溶性部分对塔氏弧菌有很强的抑菌作用；枇杷叶提取物对4株弧菌均无抑制作用。

Bellflower to soil and acetone in petroleum ether 10-Soxhlet extraction in the extraction, extracts of the scale centrifuge tube in a concentrated sulphuric acid purification.

土壤和桔梗以石油醚十丙酮在索氏提取器中提取，提取液在刻度离心试管中以浓硫酸净化。

The products were recrystallized by petroleum ether. The purity of 1,2 bis chlormethyl benzol was beyond 98%.

考察了邻二-苯在ZnSO4 催化剂存在下反应条件对合成邻苯二甲醛的影响。

Suitable water-immiscible organic solvents include aromatic hydrocarbons, eg toluene, xylene, naphthalene, tetrahydronaphthalene and methyl naphthalene; chlorinated aromatic hydrocarbons, eg chlorobenzene, fluorobenzene, chloronaphthalene and bromonaphthalene; esters, eg butyl acetate, ethyl acetate, methyl benzoate, ethyl benzoate, benzyl benzoate, butyl benzoate, phenylethyl acetate, butyl lactate, benzyl lactate, diethyleneglycol dipropionate, dimethyl phthalate, diethyl phthalate, dibutyl phthalate, di(2-ethylhexyl) phthalate; alcohols having six or more carbon atoms, eg hexanol, octanol, benzyl alcohol, phenyl ethanol, phenoxy ethanol, phenoxy propanol and phenoxy butanol; ethers having at least 5 carbon atoms, preferably C 5-14 ethers, eg anisole and phenetol; nitrocellulose, cellulose ether, cellulose acetate; low odour petroleum distillates; turpentine; white spirits; naphtha; isopropylbiphenyl; terpene; vegetable oil; mineral oil; essential oil; and natural oil; and mixtures of any two or more thereof.

适用于水互溶的有机溶剂包括芳香族碳氢化合物，如甲苯，二甲苯，萘，四氢萘和甲基萘；氯代芳香族碳氢化合物，如氯苯，氟，氯萘和萘；酯类，如醋酸丁酯，醋酸乙酯，苯甲酸甲酯，苯甲酸乙酯，苄酯，苯甲酸正丁酯，苯，醋酸丁酯乳酸，乳酸苄，二甘醇二丙酸酯，邻苯二甲酸二甲酯，邻苯二甲酸二乙酯，邻苯二甲酸二丁酯，二（2乙基己基）酯；醇有6个或更多碳原子，如己醇，辛醇，苯甲醇，苯乙醇，苯氧基乙醇，丙醇和苯氧基苯氧丁醇；醚至少有5个碳原子，最好荤5-14醚，如苯甲醚和phenetol；硝化棉，纤维素醚，醋酸纤维素，低气味石油蒸馏；松节油；白酒，石脑油isopropylbiphenyl；萜类，植物油，矿物油，挥发油；和天然油，以及任何两个或两个以上其混合物。

One of them is my best friend.

他们中的一个是我的最好的朋友。

Evangelizing and discipling students in the Christian faith in a loving and nurturing environment .

2，在充满爱心与教养的环境中，以基督教信仰传播福音和栽培学生成为耶稣基督的门徒。