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萃取剂

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In the present study, black soybean koji were first prepared with Aspergillus awamori. The change of total phenolics , isoflavone content and antioxidant activity of black soybean and black soybean koji after heating at various temperature(40,60,80,100℃)for 30 min and storage at 4℃ and 25℃ for 120 days under different packaging conditions(desiccant + deoxidant, desiccant, deoxidant , without desiccant and deoxidant)was investigated. The antioxidant activity examined included DPPH radical-scavenging effect, Fe2+-chelating effect, trolox equivalent antioxidant capacityand reducing power.

本研究以Aspergillus awamori作为菌酛制备黑豆麴,探讨黑豆及黑豆麴经不同温度(40、60、80及100℃)加热30分钟,以及在不同包装条件(乾燥剂+脱氧剂、乾燥剂、脱氧剂及不添加任何食品保存剂)与不同温度(4℃及25℃)下储存120天过程中总酚类化合物含量、总异黄酮素含量及异黄酮素组成及其甲醇萃取物抗氧化活性之变化,抗氧化活性之检测项目包括DPPH自由基清除能力、亚铁离子鳌合力、Trolox equivalent antioxidant capacity及还原力。

The experimental results showed that using ionic liquid Et3NHCl-2AlCl3 under the conditions of an extraction temperature of 40℃, an extraction time of 40 min and an agent/oil ratio of 0.02, the sulfur removal rate was more than 90%. The ionic liquids could be used repeatedly for 4 times and the used ionic liquids could be regenerated by vacuum distillation, about 52.34% of the thiophen was recovered during regeneration.

实验结果表明,选用无水AlCl3与Et3NHCl的摩尔比为2.0的离子液体进行萃取脱硫实验,当萃取时间为40 min、温度为40 ℃、剂油体积比为0.02时,脱硫率可达到90%以上;离子液体不仅可以重复使用4次,而且还可以通过减压蒸馏的方法进行再生,在再生过程中可回收约52.34%的噻吩。

Supercritical fluid carbon dioxide can extract crocin and geniposide, but only under the condition of high temperature, high pressure and adding a great deal of modifier, the extracting rate can be up to above 90%.Ⅱ.

超临界CO〓对藏花素和栀子甙具有一定的萃取能力,但需在高温高压及加大量夹带剂的情况下,萃取率才可达90%以上。Ⅱ。

Water samples were extracted and purified and collected by solid-phase extraction LC-18 column. Soil samples were extracted by ethyl acetate/petroleum ether (2:1, by vol) and purified by sulphonation. Wheat sample was extracted by acetonitrile/water (4:1, by vol) and purified and collected by SPE- Florisil column.

水样直接用LC-18固相萃取小柱分离、净化和富集;采用乙酸乙酯/石油醚(体积比2:1)振荡提取,磺化法净化,测定土壤中氯氟吡氧乙酸残留量;以乙腈/水(体积比4:1)为提取剂,氟罗里硅土固相萃取小柱分离、净化,测定小麦样品中氯氟吡氧乙酸的残留量。

Supercritical carbon dioxide extraction of lutein ester from marigold(Tagetes erect L.)with continuous co-solvent ;2. This paper reviews comprehensively the machinary and methods of co-solvent added in the supercritical CO2 for extraction of natural products.

综述了夹带剂在超临界CO2萃取天然产物中的作用机理、使用方法、夹带剂的种类,以及夹带剂在提取生物碱、酚酸、皂苷、黄酮、脂肪酸等天然产物中的应用。

Supercritical fluid extraction of pesticide residues of chlorothalonil, aldrin, dieldrin, and endrin from chives was evaluated.

建立了用超临界流体萃取、气相色谱测定韭菜中百菌清、艾氏剂、狄氏剂、异狄氏剂残留量的方法。

HCB and ∑DDTs were detected in 100 percent and 99.2 percent respectively of all soil samples, while the concentrations of Aldrin, Dieldrin, Endrin, Heptachlor and Mirex were below the detection limit.

2004年5月31日至6月8日采集了安徽省境内的长江流域、淮河流域、巢湖周边的119个土壤表层样品,利用ASE萃取技术,使用GC/MS方法测定了样品中的六氯苯、氯丹、滴滴涕类物质、艾氏剂、狄氏剂、异狄氏剂、七氯和灭蚁灵等有机氯杀虫剂的含量。

In the dissertations, ginger essential oil and oleoresin extracted with Supercritical Carbon Dioxide Extraction Technology (SFE-CO_2) and fresh ginger were used as core material to develop ginger beverage concentrate which consisiting of a spicy ginger emulsion flavor and the ginger root extract.

本研究以超临界萃取的姜精油、姜油树脂和生姜为原料,研究了生姜饮料主剂——鲜姜风味萃取物、姜辣乳化香精。

The experiment results indicate that higher phase splitting speed and extraction factor can be achieved when low-carbon alcohols such as n-butanol are used as organic solvents; by using five different N-carbobenzyloxy-L-amino acids as chiral ligands that are formated with Cu(superscript 2+) or Ni(superscript 2+), it is found that as a ligand, Z-Phe has a low extraction factor, while Z-Hyp, Z-Pro, Z-Glu, Z-Val have higher extraction factors, and among these, Z-Val has the highest distribution coefficient; pH value of extractant, when near to the PI of phenylalanine, helps to improve extraction resolution effect; temperature has no obvious effect on the resolution result.

结果表明:以低碳醇类正丁醇作有机稀释剂,所用5种N-苄氧羰基氨基酸(分别为Z-Phe、Z-Hyp、Z-Pro、Z-Glu、Z-Val)与Cu(上标 2+)或Ni(上标 2+)形成手性配位体后,以Z-Val作手性配体,萃取相pH值接近苯丙氨酸等电点时,萃取拆分效果最佳。

In this study, the dry pericarps were extracted by solvents and estimated the biological activities such as antimicrobial activities, antioxidant abilities, anti-inflammatory properties. In addition, the extracts were also applied on hair for the evaluation of detergency, combing, stretching, surface tension and wetting.

本研究取乾燥无患子果皮经溶剂萃取后进行生物活性测试包括抗菌、抗氧化、抗发炎并将其应用於洗剂以头发评估清洁力、梳理性、拉力、表面张力及湿润性,增加无患子在化菻~中天然成分的作用价值。

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As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。

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