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The head volatile of fresh flower of Chimonanthus praecox Link .

用顶空和不同吸附吸附法收集蜡梅花的头香,并用GC-MS法对其进行了化学成分研究。

The PAHs sorption on soil/sediment resulted from coaction of mineral substances and organic matter other than surface sorption or distribution process only.

在多环芳烃吸附过程中,如何结合其定量结构性质、有机无机复合体的界面结构以及环境化学特征认识吸附机理是今后研究的一个趋势。

According to the water quality characteristics of mine water in Shanxi province experiment is made to study to removal effect of sulfate radical by coagulative adsorption of mine water .

针对山西省煤矿矿井水的水质特性,研究通过混凝吸附作用对矿井水中硫酸根的去除效果,通过实验,发现在pH=7~8时,采用Ca2+PAC+少量PAM的药剂投加方式,对矿井水中硫酸根的混凝吸附去除效果较好。

The removal of these impurities by three kinds of active carbon(coaly activated carbon,fruit hull activated carbon,woodiness activated carbon) are studied under different experimental conditions.The results show that the fruit hull active carbon is not suitable for the removal of the impurity in bittern of salt lake because its removing rate of COD and turbidity is ...

以去除盐湖卤水中COD和浊度为目的,选用煤质活性炭、果壳活性炭、木质活性炭3种不同活性炭进行净化除杂的工艺研究,结果表明:果壳活性炭对COD和浊度的去除率最低,加入量最大,不宜选用;木质活性炭在低温下(≤20℃)脱除COD效果较好,在常温下(28~45℃)去除COD和浊度的效率明显低于煤质活性炭;在震荡速度、吸附时间及吸附剂加入量均相同的情况下,煤质活性炭脱色除杂效果明显优于其余两种活性炭,在盐湖卤水的脱色净化工程中应优先选用。

Vanadium mainly exists as independent minerals or in clay minerals in the form of isomorphism, with a small amount absorbed by clay minerals and limonite. Nickel mainly exists as independent minerals. Molybdenum occurs as colloidal sulfides with carbon, sulfur and clay, and forms molybdenite through thermal metamorphism. Uranium is unevenly scattered in collophanite and carbonaceous_argillaceous materials in the form of isomorphism or adsorption. REE mainly occur in collophanite in the form of isomorphism. Copper, lead and zinc chiefly exist in sulfides or sulfo_arsenides and are concentrated in the metallic layer.

钒或以独立矿物存在,或以类质同象赋存在粘土矿物中;镍主要以独立矿物存在;钼主要与碳、硫、粘土一起呈钼硫化物胶状集合体,经热接触变质作用后形成辉钼矿;铀呈不均匀分散在胶磷矿和碳泥质中,呈类质同象或吸附状态存在;稀土元素主要呈类质同存在于胶磷矿中,部分呈吸附状态存在;铜、铅、锌主要以硫化物和硫砷化物等存在,多富集在金属层中。

To explore new use of waste salt silt, F(superscript -) adsorbent was produced using waste salt silt of chloro-alkaline factory and acrylic acid to copolymerize, potassium persulfate as initiator, with which to treat high F(superscript -) water.

为了探索氯碱厂废弃盐泥的新用途,将氯碱厂废弃盐泥与丙烯酸等共聚,过硫酸钾作引发剂,制得了吸附率为86%~89%的F吸附剂,用于处理超标含氟污水。

In the course of establishing standard operating procedure, The temperature, time , the feasibility without decorticating and efficiency were investigated when alliinase was deactivated used a dry heating apparatus in tunnel type, but the efficiency can be achieved less than 70%, need to be improved; The reformative cribriform plate has been proved to be good in practice result in pulping enzyme-deactivated garlic without dehulling; The extraction efficiency achieved more than 90% when volumic ratio of 20% alcohol and water is 3 I 1 and 2:1 was adopted to extract alliin two times respectively; During exact filtration, the ratio of diatomite in precoating and filtration was 3% and 1% respectively, the losses of alliin adsorbed by diatomite in extraction solution were not remarkable. In the stage of alliin isolation by ion exchange resin, three simple and sensitive detected measures were successfully adopted to control the whole process; the efficiency of alliin isolation was similar to laboratory results; The alliin yield was over 50% in acidic fractions and the purity quotient of alliin achieved above 50% after drying; Furthermore, the phenomenon was found that losses of alliin were seriously affected by the temperature and time periods in concentration.

在制定中试生产标准操作规程中,考察了隧道式干热烘干机杀酶的温度、时间和效率,干热灭酶效率只能达到70%,待改进;改良的筛板使带皮打浆效果良好,证明非脱皮熟蒜打浆的可行性,减少了工序,降低了成本;提取过程中,20%酒精分别1∶3和1∶2提取2次,效率达90%以上;硅藻土板框过滤时,探索了精滤过程中提取液中预涂和过滤时硅藻土的比例分别为3%和1%,并考察硅藻土对蒜氨酸的吸附损失,滤液澄明度良好,蒜氨酸损失很少;在树脂吸附分离阶段,采用三种简便灵敏检测手段控制生产过程,分离蒜氨酸的效果与实验室一致,酸性流分中蒜氨酸收率可达50%以上,干燥后蒜氨酸纯度达50%以上;试验发现浓缩蒜氨酸洗脱液时温度和浓缩时间对蒜氨酸损失的具有很大影响。

AIM: To select optimum macroporous resin and adsorption conditions of crocin in Fructus gardeniae .

目的 :优选栀子西红花总苷的吸附树脂及吸附条件。

It was concluded that Cyclohexene is obtained due to the existence of a water films.

总结指出,反应中,水吸附在催化剂表面形成水膜吸附层。

Cytophaga sp was selected for heparinase production because it was more productive. Three heparinases, named HⅠ, HⅡ and H Ⅲ were purified from the crude cell extract by means of batch DEAE-Cellulose negative adsorption, Hydroxylaptide adsorption and releasing, SP-Sepharose cation exchange chromatography, Source 30S cation exchange chromatography, Poros 20HS cation exchange perfusion chromatography and Sephacryl S200HR gel permeation chromatography.

利用超声破碎、DEAE-纤维素反吸附去杂、羟基磷灰石批处理吸附层析、SP-Sepharose离子交换层析、Source 30S离子交换层析、Porous20HS离子交换灌注层析及Sephacryl S200HR凝胶排阻层析,从噬纤维菌中纯化出三种新的肝素酶。

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