Objective:To investigate the potential of bidirectional solid fermentation of rhubarb (Rheum palmatum L.) for reducing its toxicity and enhancing its medicinal efficacy.Methods:The fungus Trametes robiniophila Murr.wa...Objective:To investigate the potential of bidirectional solid fermentation of rhubarb (Rheum palmatum L.) for reducing its toxicity and enhancing its medicinal efficacy.Methods:The fungus Trametes robiniophila Murr.was inoculated into rhubarb.The chemical ingredients as well as antioxidant,antibacterial,and anticancer activities of fermented and unfermented rhubarb extracts were then determined.Results:After fermentation,levels of anthraquinone glycosides (purgative ingredients) decreased significantly,while the level of anthraquinone aglycone increased.The level of gallic acid was also reduced after fermentation.Ethanol extract of rhubarb (0.8 mg/mL) exhibited DPPH-scavenging activity of 7.6% ± 0.8% while the blank control (0.8 mg/mL rhubarb)showed 31.3% ± 2.0% activity.Antibacterial activities in fermented samples were found to be enhanced compared with unfermented samples and anticancer activity was evident at concentrations of 2000 and 5000 μg/mL.Conclusion:Bidirectional solid fermentation appears to be an effective processing method that can be used to improve the efficacy and reduce the toxicity of rhubarb.展开更多
目的:建立槐耳大黄双向发酵体系。方法:采用硫酸—苯酚比色法、醋酸镁—甲醇比色法、高效液相色谱法分别测定多糖含量、总蒽醌含量、4种游离型蒽醌含量,并结合折干率、消耗率等指标对药材用量、温度、加水量等工艺条件进行优化。结果:采...目的:建立槐耳大黄双向发酵体系。方法:采用硫酸—苯酚比色法、醋酸镁—甲醇比色法、高效液相色谱法分别测定多糖含量、总蒽醌含量、4种游离型蒽醌含量,并结合折干率、消耗率等指标对药材用量、温度、加水量等工艺条件进行优化。结果:采用500 m L锥形瓶进行槐耳大黄双向发酵时,最佳工艺为:药材用量10 g,温度34℃,加水量120%。结论:双向发酵使大黄游离型蒽醌含量增加,其中具有抗氧化作用的大黄酚含量有所增加,结合型蒽醌减少,可缓和大黄峻烈的泻下作用。展开更多
文摘Objective:To investigate the potential of bidirectional solid fermentation of rhubarb (Rheum palmatum L.) for reducing its toxicity and enhancing its medicinal efficacy.Methods:The fungus Trametes robiniophila Murr.was inoculated into rhubarb.The chemical ingredients as well as antioxidant,antibacterial,and anticancer activities of fermented and unfermented rhubarb extracts were then determined.Results:After fermentation,levels of anthraquinone glycosides (purgative ingredients) decreased significantly,while the level of anthraquinone aglycone increased.The level of gallic acid was also reduced after fermentation.Ethanol extract of rhubarb (0.8 mg/mL) exhibited DPPH-scavenging activity of 7.6% ± 0.8% while the blank control (0.8 mg/mL rhubarb)showed 31.3% ± 2.0% activity.Antibacterial activities in fermented samples were found to be enhanced compared with unfermented samples and anticancer activity was evident at concentrations of 2000 and 5000 μg/mL.Conclusion:Bidirectional solid fermentation appears to be an effective processing method that can be used to improve the efficacy and reduce the toxicity of rhubarb.
文摘目的:建立槐耳大黄双向发酵体系。方法:采用硫酸—苯酚比色法、醋酸镁—甲醇比色法、高效液相色谱法分别测定多糖含量、总蒽醌含量、4种游离型蒽醌含量,并结合折干率、消耗率等指标对药材用量、温度、加水量等工艺条件进行优化。结果:采用500 m L锥形瓶进行槐耳大黄双向发酵时,最佳工艺为:药材用量10 g,温度34℃,加水量120%。结论:双向发酵使大黄游离型蒽醌含量增加,其中具有抗氧化作用的大黄酚含量有所增加,结合型蒽醌减少,可缓和大黄峻烈的泻下作用。
