查询词典 extractive

Summed up the research progress that exceeds critical and extractive technology to apply at alkaloid to depart, analysed each elements of effect of influence alkaloid depart, outside waiting for common element except temperature, pressure, dissolvent, extractive time, alkalify reagent can improve the detached result of alkaloid, carry secretly agent rose to exceed the capacity of critical and extractive fluid.

综述了超临界萃取技术应用于生物碱分离的探究进展，分析了影响生物碱分离效果的各个因素，除温度、压力、溶剂、萃取时间等常见因素外，碱化试剂能够改善生物碱的分离效果，夹带剂则提高了超临界萃取流体的能力。

Batch extractive distillation is used to separate azeotrope or the mixture of which the relative volatility is close to 1.0. For it has both advantages of batch distillation and extractive distillation, batch extractive distillation is becoming increasingly important to the production of small scale and high value products like fine chemicals and pharmaceuticals.

间歇萃取精馏是分离共沸物或近沸物的一种方法，由于它结合了间歇和萃取的优点，特别适用于化工、制药、溶剂回收、天然产物提取等产量小，品种多的行业，因此间歇萃取精馏近年来已成为非常活跃的研究和开发领域。

In the end, the extractive distillation method was applied to separate and purify the binary azeotrope mixture, methanol-dimethyl carbonate. The isoamyl acetate was used as extractant and the two tower system was introduced to continuous extractive distillation operation. The results show a better separation effect.

最后采用萃取精馏的方法，对甲醇-碳酸二甲酯的二元共沸混合物进行了分离提纯研究，以毒性较低的乙酸异戊酯为萃取剂，采用两塔连续萃取精馏操作，结果表明，分离效果比较理想。

Meanwhile, experiment with the ternary mixture of methanol, butyl methyl ether and 1-chlorobytane showed that the system was not ternary azeotrope and can be separated by combination of extractive and rectification using water as extractive solvent.

针对甲醇、甲基正丁醚和正氯丁烷三元混合物，研究了该物系的性质，得到该物系不是三元共沸物的结论，并用水作萃取剂，通过实验验证了利用萃取和精馏耦合的方法分离该物系的可行性。

Linear solvation energy relation was firstly introduced in the paper, and the method and step of gaining the special parameters of solvent and solute were introduced in detail, and these special parameters were used to selection and optimization of extractive agent in extractive distillation. The model of predicting activity coefficient at infinite dilution was established by linear solvation energy relation. By the above theory, several candidate solvents were selected to separate C5 fraction, and by experiment of vapor-liquid phase equilibrium at atmosphere pressure, the mixture of N-methyl-pyrrolidone including 4% water was used extractive agent of separating C5 fraction. Then binary vapor-liquid phase equilibrium of the some compound in C5 fraction and N-methyl-pyrolidone were determined at atmosphere pressure and correlated by NRTL equation. Isoprene being objective compound, experiments were operated in the laboratory-scale column; the processes were simulated by RadFrac model in ASPEN PLUS. And by the combination of experiment and simulation, the new process of separation of C5 was established.

本文首先对线性溶剂化能关系进行了分析介绍，也介绍了采用溶剂化能关系得到溶质溶剂特性参数的方法步骤，并将这些参数用于萃取精馏萃取剂的选择与优化；也通过线性溶剂化能关系式建立无限稀释活度系数预测模型，取得了一定的预测精度；将通过上述方法初选的溶剂进行了常压汽液平衡的测定研究，通过实验研究选定含水4%的N-甲基吡咯烷酮溶液做为C5分离的萃取剂，测定了大量N-甲基吡咯烷酮与C5组分的二元平衡数据，并进行关联计算；以异戊二烯为目标产物在实验室规模的精馏塔内进行了C5分离的实验研究，取得大量塔内数据；通过选用合适的热力学模型，采用ASPEN中RadFrac模块对分离过程进行模拟研究，通过实验与模拟相结合，建立了C5分离的新工艺，为将来的工业化打下了坚实的基础。

Acetone extractive of Euphorbia hirta may be have viricidal effect on spores of C. higginsianum. Ethyl acetate extractive of E. hirta may be have inhibited effects on conidium germination or growth of hypha of C. higginsianum.

大飞扬草的丙酮提取物对炭疽菌孢子可能具有毒害作用，乙酸乙酯提取物使炭疽菌和链格孢菌孢子芽管生长不正常，且对其菌丝生长具有抑制作用。

In acidic condition, the extractive form waste water in hardboard production reacts with extra amount of formaldehyde at 1-5∶1 (formaldehyde : solid extractive, based on weight) to prepare extractive-formaldehydecomplex, then urea or phenol is added into the solution of this complex and reacts with unreacted formaldehyde to form a new adhesive system.

利用纤维板生产中废水提取物与过量甲醛(甲醛溶液与粉状废水提取物的重量比为1～5：1)在酸性条件下可制成纤维板废水提取物-甲醛复合体，此种复合体反应液中的过量甲醛再用尿素或苯酚吸收，从而制成尿素改性纤维板废液胶。

This text discusses the sanitary function and technology of extractive of Fructus Schisandrae Chinensis,and the exploitation of extractive in the unity type and combination type sapid substance.

对北五味子的保健功能、提取工艺研究及其在单一型和复合型调味料中开发利用进行了论述。

The solvent selection for extractive distillation and separation of azeotropic mixtures by batch extractive distillation were studied via theoretical analysis and the experiment.

本文通过理论分析和实验相结合的方法，主要研究了共沸物萃取精馏溶剂的选择以及共沸混合物的间歇萃取精馏工艺。

RESULTS The water extractive and cos tunolide could inhibit intestine peristalsis of the mice; each team had an obvious cholagogic effect compared with control team and alcohol extractive was stronger than water extractive, costunolide and dehydrocostuslactone were very strong in cholagogic and could be regarded as the main cholagogic constituents.

结果 ig给木香水提物 1.4 g/kg，4.2 g/kg）和木香烃内酯（9 mg/kg，27 mg/kg）对小白鼠的肠蠕动具有抑制作用；熊去氧胆酸（100 mg/kg ）、木香水提物组（540 mg/kg）、木香醇提物组（480 mg/kg）、木香烃内酯组（100 mg/k g）、去氢木香内酯组（100 mg/kg）与对照组相比，各组均有明显的利胆作用，且醇提物要比水提物作用强，木香烃内酯、去氢木香内酯利胆作用很强，可视为木香中的主要利胆成分。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。