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extraction yields
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  提取率
    The extraction yields of total flavonoids by using the four extraction methods are 43.7, 48.2, 42.7 and 34.7 mg/g , and total saponins are 60.2, 61.5, 59.8 and 46.5 mg/g respectively.
    各种提取方法总黄酮的提取率分别为43. 7、48. 2、42. 7和34. 7mg/g; 总皂苷的提取效率分别为60. 2、61. 5、59. 8和46. 5mg/g.
短句来源
    the yields of crude extract were 5.86, 6.36, 6.86, and 3.80,respectively. Using HPLC to quantitatively determine the mass fractions of the first three azadirachtin, extractionyields were 0.54, 0.55, and 0.48, respectively.
    结果粗提物的提取率依次为5.86%、6.36%、6.86%、3.80%,用高压液相法定量测定前3种印楝素的质量分数,计算提取率依次为0.54%、0.55%、0.48%。
短句来源
    Extraction yield of 64.1% is obtained by dualfrequency,while extraction yields are 36.8% and 19.0% by using single frequency ultrasounds of 25kHz and 40kHz,respectively.
    25kHz与40kHz双频超声时的提取率为64.1%,单频25kHz及40kHz时的提取率分别为36.8%和19.0%,双频超声强化的提取率显著高于单频超声强化的提取率
短句来源
    A device composed of 25 kHz and 40 kHz ultrasound was designed and applied to extract berberine from Phellodendron,The result showed dual-frequency ultrasonic irradiation can improve the extraction yield. Extraction yield by dual frequency could reach up to 68.9% in 5 min,whereas extraction yields of 25 kHz and 40 kHz individually are 52.9% and 45.2% in 30 min separately.
    设计25kHz和40kHz的双频超声强化装置,以黄柏为对象提取小檗碱,结果表明:25kHz与40kHz双频超声强化5min,提取率为64.1%,25kHz及40kHz超声30min,提取率分别为52.9%和45.2%,双频超声强化的提取率显著高于单频超声强化的提取率
短句来源
    By orthogonal experiment, extraction of curcumin from rhizome of Curcuma longa Linn. with metheds of conventional solvent , ultrasonic and microwave assisted extraction were studied. Under optimum extraction conditions, the yields of curcumin by these methods were 2.53% , 3.22% , 3.61% with one-time extraction respectively, and the extraction yields were 62.6% , 79.7% , 89.3% respectively.
    用正交试验设计方法分别优化了溶剂回流提取、超声波辅助提取和微波辅助提取3种提取方法中一次提取姜黄色素的最佳工艺条件,对比最佳提取工艺条件下一次提取姜黄色素的得率分别为2.53%、3.22%和3.61%,其一次提取率分别为62.6%、79.7%和89.3%。
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    As for the extraction of Hawthorne Rutin, under the experimental condition in this paper, low power (65W) and the high power (455W) all can achieve the same higher extraction yields;
    本文实验条件下,对于山楂芦丁提取,低功率(65W)和高功率(455W)均能达到较好的提取效果;
短句来源
    Extraction technique of tall oil by supercritical carbon dioxide method was studied. Factors affecting extraction yields,such as temperature,pressure carbon dioxide flow rate and time,were discussed.
    应用超临界二氧化碳萃取技术 ,研究了妥尔油酸性物的提取分离工艺 ,探讨了萃取温度、萃取压力、二氧化碳流量和萃取时间等因素对妥尔油酸性物得率的影响。
短句来源
    Using total alkaloids as the guide, influencing factors of extraction yields of alkaloids from Cynanchum komarovii including solvent concentration (using hydrochloric acid and ethanol as extract solvent) and extracting method (using water as extract solvent) were studied.
    以总生物碱含量为指标,考察提取溶剂浓度(以盐酸、乙醇为溶剂时)和提取方法(以水为溶剂时)对牛心朴子总生物碱提取量的影响;
短句来源
    METHODS The extraction yields of notoginsenoside R_(1),ginsenoside Rg_1,panax notoginseng saponins(PNS) and extractives were considered as the optimization index. Orthogonal design method was used to optimize the process parameters,including contents of alcohol,solvent volume,extraction time and temperature.
    方法以三七皂苷R1、人参皂苷Rg1、总皂苷和浸出物含量为优化目标,采用正交试验设计,考察乙醇浓度、溶剂用量、阶段提取时间和提取温度等因素对优化目标的影响;
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  extraction yields
The extraction yields increased as CO2 density increased with a pressure rise at constant temperature.
      
Nuclear fuel reprocessing requires high acidity levels that should be accurately and rapidly controlled in order to optimize extraction yields and process efficiency.
      
Total carbon measurements were performed for the aerosols in 1996 and the extraction yields are given.
      
Extraction yields were relatively high for the14C materials (up to 11% of residual soil14C for 6 weeks maize) illustrating the water soluble character of the freshly added material.
      
Recovery experiments on simulated samples spiked with 14C-labeled sodium carbonate, sodium acetate and sodium formate, showed extraction yields of 94-98%.
      
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The penicillin acylase was extracted from Escherichia coli by method of solvent-freeze thawing, and purified by precipitation with (NH_4)_2SO_4, then dialysed and freeze-dried. The extraction yield was 47. 93%.

采用冻融-溶媒法从大肠杆菌中提取青霉素酰化酶(经硫酸铵沉淀、透析、冷冻干燥),制得酶粉,活力为1100.37u/g,经六批提取试验,平均提取收率47.93%。分别测定游离酶及其固定化酶米氏常数Km值。游离酶的Km值为2.39mM,固定化酶按其颗粒大小不同,Km值分别为5.62、8.46、8.42mM。 在对pH稳定性测定中,游离酶最适pH为7~8,而固定化后在pH5~9之间都较稳定。对温度的稳定性测定中,游离酶与固定化酶在40℃以下都较稳定,但在45℃保温一小时后,游离酶只存留活力39.51%,而固定化酶却存留活力86.92%,二者有显著差异、温度再高相差更大。因此酶经固定化后,对pH和温度的稳定性都有明显提高。金属离子对青霉素酰化酶的活力有所影响。特别是铁离子和铜离子影响较大,故酶反应容器不能采用铁和铜的材料。

The study showed that the L-argmine-adsorbing capacity of strong-acidic resin 001×7 was 1.135 meq per ml of wet resin by controlling the flow rate of the broth at 1/52 vvm, and the efficiency of the elution was higher by using ammnia water as an eluent at the flow rate of 1/50 vvm. About 160 ml of the above eluant was decolorized with 10 ml of 201×4 resin, the transparance of the decolorized eluant was over 90%, and no adsorption of L-arginine by the 201×4 resin was observed. Under the controlled conditions,...

The study showed that the L-argmine-adsorbing capacity of strong-acidic resin 001×7 was 1.135 meq per ml of wet resin by controlling the flow rate of the broth at 1/52 vvm, and the efficiency of the elution was higher by using ammnia water as an eluent at the flow rate of 1/50 vvm. About 160 ml of the above eluant was decolorized with 10 ml of 201×4 resin, the transparance of the decolorized eluant was over 90%, and no adsorption of L-arginine by the 201×4 resin was observed. Under the controlled conditions, the extraction yield of L-arginine reached over 95%.

在发酵生产L-精氢酸的提取工艺中,对提取总收率影响较大的离子交换工艺进行了研究。结果表明,用国产强酸性001×7树脂对发酵液中的L-精氨酸进行动态交换吸附,当上柱流速控制在1/50vvm条件下,其交换量为1.135meq/ml湿树脂。用2.5mol/L氨水洗脱,流速控制在1/50vvm时,其洗脱效果最好。用国产201×4树脂进行脱色,每10ml树脂可脱色160ml以上的洗脱液,透光度大于90%,几乎不发生交换吸附L-精氨酸的现象。离子交换工序收率大于95%。

The process of the extraction of fulvic acid from peat was studied,The comparation among alkali—、acid— and ion—exchang—process was Carried out.The extraction yield in alkali process up to 50.39% was obtained It was found that NaOH is the best extracting agent in alkali-roccss.

本文研究了由草炭中提取黄腐酸的方法。对三种提取法(酸法、离子交换法和碱法)进行比较,其中碱法提取率达50.39%。本试验并对碱性提取剂进行选择,认为以NaOH为代表的提取剂为最佳。

 
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