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超声波法提取灵芝多糖的研究 总被引：19，自引：1，他引：19
通过单因素考察及正交实验优化了用超声波法提取灵芝多糖的实验条件 ,并与酸提取方法进行了比较。结果显示在灵芝干粉中加入 6 2 5倍体积的水 ,在pH2 0的条件下用超声波提取 4 5min得到的灵芝多糖的量最多。与酸提取法相比 ,超声波法的粗提物提取率稍高(分别为 11 0 5 %和 13 85 % ,P >0 0 5 ) ;但提出物中的糖含量明显增加 (分别为 2 2 4 1%和 34 6 0 % ,P <0 0 1) ,大分子杂质明显减少 (分别为 1 4 5 %和 0 6 8% ,P <0 0 1)。 相似文献
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采用醇沉法和膜分离法制备灵芝（Ganoderma lucidum）孢子多糖，测定其得率、多糖含量、单糖组成，并通过迟发型变态反应、脾细胞抗体生成、碳廓清、NK细胞活性实验，考察灵芝孢子多糖的免疫调节活性。结果表明：膜分离法制备的灵芝孢子多糖得率高于醇沉法，为（4.61±0.28）%；两者多糖含量无显著差异。醇沉法、膜分离法制备的灵芝孢子多糖单糖组成均为鼠李糖、木糖、甘露糖、葡萄糖、半乳糖和山梨糖，其摩尔比分别为0.34∶0.31∶1.44∶4.48∶3.35∶0.31和0.27∶0.10∶1.70∶6.08∶1.84∶0.31，均以葡萄糖为主要组成单糖。两种灵芝孢子多糖均能增强小鼠免疫调节活性。研究结果可为灵芝孢子多糖产业化提供参考。 相似文献
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灵芝是滋补强壮、扶正固本的珍贵药物,灵芝多糖是起医疗保健作用的主要组份之一。目前对灵芝多糖的提取和测定方法虽有一些报道,但尚未见到较为系统的提取野生灵芝和人工栽培灵芝多糖方法的研究报道。本文将对野生灵芝与工人栽培灵芝在多糖提取时间、酒精分离的浓度和不同提取剂以及测定方法上进行了比较研究,旨在为不同灵芝多糖的提取工艺提供可靠的依据。 相似文献
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为阐明日常的食用加工方法是否能充分利用灵芝(Ganoderma lingzhi)中的活性成分,用苯酚硫酸法和HPLC法分别检测龙芝二号子实体片经水煮、焖烧、水泡、酒浸四种加工处理的提取液中灵芝多糖和灵芝三萜含量,结果水煮、焖烧、水泡40min后多糖基本全部溶出,三萜溶出率分别为85.5%、83.1%、51.1%;50%的白酒浸泡7d后三萜溶出率为95.0%,而多糖溶出率仅为0.31%;用这些方法比较龙芝二号与菌草灵芝的处理结果,结果多糖和三萜溶出效果基本相同;通过比较,焖烧40min能使灵芝片中有效成分大部分溶出。 相似文献
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目的:研究不同预处理方法对灵芝多糖提取效果的影响。方法:对比浸泡、微波、气流精细粉碎等预处理方式对从灵芝子实体中提取灵芝多糖的影响,并比较最佳预处理方式结合热水提取、醇提取、碱提取、超声波结合酶提取、微波提取等提取方式在灵芝多糖提取方面的效果,最后通过高效液相色谱检测分析气流精细粉碎预处理后提取所得灵芝多糖的性质。结果:最佳预处理方法为气流精细粉碎,对比传统方法直接提取(粗粉碎结合热水提取),粗收率变化较小,而多糖含量提高114%,多糖得率提高104%。最佳结合方式为气流精细粉碎预处理结合碱提取,相对传统方法提取,粗收率提高76%,多糖含量提高78%,多糖得率提高215%。通过高效液相色谱检测分析气流精细粉碎预处理后提取所得灵芝多糖的性质,发现该处理方法对灵芝多糖性质的影响较小。结论和讨论:气流精细粉碎预处理能大幅提高灵芝多糖的提取效果,主要是提高提取物中灵芝多糖的含量,使多糖得率提高,提取更加完全,且对所提取多糖性质的影响较小,推测气流粉碎预处理主要是破坏了灵芝精粉颗粒的机械支撑壁膜结构,使细胞内功效物质的溶出更加完全,这方面内容将在后续开展实验中进行研究分析。 相似文献
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灵芝(Ganoderma lucidum)是我国传统中药材,多糖是灵芝的重要功能成分。通过对大段木、小段木、袋料3种不同栽培方式的灵芝多糖含量和化学性质进行比较分析。结果显示,大段木灵芝、小段木灵芝、袋料灵芝的灵芝多糖含量分别为14.67 mg·g~(-1)、11.96 mg·g~(-1)、5.35 mg·g~(-1);大段木灵芝多糖组分分子量高达4 688kDa;大段木灵芝多糖、小段木灵芝多糖和袋料灵芝多糖分别含有8种、5种和7种单糖,组成比例存在差异。本文的研究结果显示大段木栽培的灵芝多糖具有一定优势,为灵芝多糖的选择和应用提供了基础。 相似文献
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ZHENG Jing CHANG Nai-tao* LIN Ying CHENG HuiKey Laboratory of Northern Crop Immunology Ministry of Agriculture Institute of Plant Protection Shenyang Agricultural University Shenyang China 《食用菌学报》2006,(1)
Ganoderma lucidumhas been used as atraditional medicine in China for twomillennia,both as a general tonic and forbuilding up bodily resistance to disease[1].Polysaccharides are one of the most i mportantand effective components of theG.lucidumfruit body,and are widely used in medicinesand health foods.Decocting,boiling or steamdistillation are the main methods commonlyused to extract polysaccharide.These methodsare usually ti me-consuming and,becauseextraction efficiencies are low,result in c… 相似文献
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AIM:To elucidate the effect of antisense oligo-peptide nucleic acid (PNA) against PDGF-B mRNA on in vivo proliferation of VSMCs and vascular restenosis. METHODS:A rabbit vascular restenotic model was constructed and a synthesized PNA was transfected into the vascular cells using a therapeutic ultrasound for the gene drug delivery. The proliferation of intimal VSMCs was observed by monitoring the expression of proliferating cell nuclear antigen (PCNA) and platelet-derived growth factor B chain mRNA (PDGF-B mRNA) with the LSAB and in situ hybridization, respectively. The intimal thickness and area were measured. RESULTS:PNA delivered by therapeutic ultrasound significantly inhibited the expression of PCNA and PDGF-B mRNA by intimal VSMCs 1 week after denudation with the inhibitory rates of 84.19% and 64.95%, respectively and reduced the intimal thickness and area. CONCLUSION:The PNA against PDGF-B mRNA delivered by therapeatic ultrasound inhibits the proliferation of rabbit VSMCs and the formation of intima. 相似文献
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Grapevine leaves are consumed as a food in Mediterranean countries. At the same time, it is a byproduct of the wine industry. Antioxidant, antihypertensive and antidiabetic properties of grapevine leaves after ultrasound-assisted extraction (UAE), microwave assisted extraction (MAE) and classical solvent extraction (CSE) were evaluated and compared by using water and methanol as solvent. DPPH radical scavenging activity, total phenolic content (TPC), total antioxidant capacity (TEAC), metal chelating activity, ACE inhibitory activity and α?glucosidase inhibitory activity of grapevine leaves extracts were determined. The highest values of grapevine leave extracts for antioxidant properties; DPPH (61.60%), TPC (910.18?mg GAE?g?1), TEAC (6.23?µg Trolox mg?1) and metal chelating activity (IC50; 3.18?mg mL?1) were obtained from UAE when the methanol was used extracting solvent. However antihypertensive activity (13.68%) and antidiabetic activity (83.00%) values obtained from MAE by using water as a solvent were relatively highest. The effectiveness of UAE, MAE and CSE methods in terms of antioxidant, antihypertensive and antidiabetic properties of grapevine leaves were significantly (p?<?0.05) different from each other. This differences depending on the solvent used. 相似文献