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manlovecc

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Hesperidin, an abundant and inexpensive bioflavonoid in Penggan (Citrus reticulata) peel, has been reported to possess a wide range
of pharmacological properties. Ultrasonic extraction is an effective technique for the isolation of bioactive compounds from vegetable
materials. In this study, the application of ultrasonic method was shown to be more effcient in extracting hesperidin from Penggan
(C. reticulata) peel than the classical method. The effects of main ultrasonic-assisted extraction conditions on extraction yields of hesperidin from Penggan (C.reticulata) peel were evaluated, including extraction solvents, solvent volume, temperature, extraction time, ultrasonic power, ultrasonic frequency. Results showed that solvent, frequency and processing temperature were the most important factors
for improving the extracting yields of hesperidin. When performed at the same temperature under the same time using three frequencies,methanol as the solvent improved the extraction yield evidently compared with ethanol or isopropanol; by comparison of the frequency influence, the yield of hesperidin washigher at 60 kHz than at 20 kHz and 100 kHz. The optimum ultrasonic conditions were determined
as: methanol, frequency of 60kHz, extraction time of 60min, and temperature of 40C. In addition, the ultrasonic power had a weak effect on the yields of hesperidin within the experimental range. Extending ultrasonic treatment times did not result in degradation of hesperidin; the rotary beaker for materials can increase the yields of hesperidin.

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橙皮苷,是在Penggan(桔)皮中含量丰富和廉价的生物类黄酮,已被报道具有广泛的药理作用。超声提取是从草本原料中分离生物活性化合物的有效手段。在本研究中,超声提取法被证明可以比经典方法更有效的从Penggan(桔)皮中提取橙皮苷。
3楼2011-02-27 17:08:11
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sam3303

至尊木虫 (著名写手)


橙皮苷---一种便宜且大量存在于Penggan 皮重的生物类黄酮,据报道,它具有较多的药理性质。超声提取是从蔬菜中提取生物活性的化合物的一种有效的方法技术。
2楼2011-02-27 17:01:13
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sam3303

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在本实验中,超声方法的应用在从Penggan皮重提取橙皮苷方面比传统的方法更加有效。 关于从Penggan皮中提取橙皮苷领域用超声波辅助的提纯方法主要条件包括提取液、溶解量、温度、提取时间、超声力度以及超声频率。
4楼2011-02-27 17:09:05
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manlovecc(金币+2, 翻译EPI+1): 2011-02-27 17:23:52
从提取溶剂、溶剂体积、提取温度、提取时间、超声功率和频度等方面,对以超声为主的提取方法中提取条件对橙皮苷收率的影响进行了评估。结果显示,溶剂、超声频度和处理温度是影响橙皮苷收率的最主要的影响因素。
5楼2011-02-27 17:16:15
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