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食药用菌是一种高蛋白营养食品.木腐食药用菌传统的栽培方法以树木为基料,经孢子自然传播生菌,往往对树木乃至森林造成损耗甚至破坏,其经济效益尚好,生态效益较差.在新技术条件下,现代食药用菌栽培巧妙利用农林业废弃物,形成循环产业.这是一种既有经济效益、又讲生态效益的生态农业技术,值得大力推广. 相似文献
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食药用菌多糖生物活性与结构的关系 总被引:22,自引:1,他引:22
食药用菌多糖作为具有提高免疫能力的生物活性物质。受到各国研究人员的重视,已成为许多学科研究的热点。本文扼要地从结构等几方面简述了食药用菌活性多糖与结构的关系。旨在为食药用菌多糖的结构分析、开发等提供参考。 相似文献
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以5种食药用菌水提取物为试材,采用测定糖苷酶抑制率的方法,研究了5种珍稀食药用菌水提取物对糖苷酶的抑制作用,以期为进一步开发降血糖药物提供参考依据。结果表明:羊肚菌、桑黄、灵芝、蝉花、虫草水提取物对4种糖苷酶均有不同程度的抑制,且差异显著(P<0.05)。5种水提物中,桑黄水提物对蔗糖酶的抑制率最高(74.8%),略低于常用的降糖药阿卡波糖以及米格列醇,虫草水提物对蔗糖酶的抑制率最低(35.9%)。虫草水提物对α-淀粉酶的抑制能力最高(9.7%)且显著高于米格列醇(P<0.05),羊肚菌水提物对α-淀粉酶的抑制最低(1.1%)。羊肚菌水提物对α-葡萄糖苷酶显示出较好的抑制能力(15.4%),显著高于阿卡波糖和米格列醇(P<0.05),而灵芝水提物对α-葡萄糖苷酶的抑制水平最低(11.2%)。灵芝水提物对麦芽糖酶显示出较高的抑制能力(10.2%),显著高于米格列醇(P<0.05),而与阿卡波糖相当,桑黄水提物对麦芽糖酶抑制最差(4.6%)。5种水提物在20~60℃以及pH 6~8时对4种糖苷酶仍然保持较好的抑制能力。 相似文献
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介绍台湾地区灵芝、冬虫夏草、姬松茸、舞茸、云芝、桑黄、樟芝、蜜环菌及白桦茸9种食药用菌的菌丝体产品的形态、历史、生产过程,及其市场销售情况。指出菇类菌丝体液体培养方式的前景十分广阔。 相似文献
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以平菇、香菇、灵芝、真姬菇、银耳、杏鲍菇、金针菇7种常见菌草菌糠浸提液配制的培养基为试材,研究了其对竹荪菌丝生长的影响,进而对最适竹荪菌丝生长的菌糠进行水溶物质的提取。将该菌糠提取物配制的不同浓度梯度的培养基与PDA培养基进行对比,筛选出最适的菌糠提取物添加量,旨在研究出一种新式竹荪母种培养基。结果表明:以菌草灵芝菌糠浸提液作为培养基,竹荪菌丝生长速度快于其它菌糠与PDA培养基(P0.01)。当向母种培养基中添加6g/L菌草灵芝菌糠提取物时,最适于竹荪菌丝的快速生长,且菌丝粗壮、洁白。 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
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P. B. Flegg 《The Journal of Horticultural Science and Biotechnology》2013,88(2):139-144
Comparisons were made between plots harvested normally by removing sporophores as soon as they reached the cup stage and plots cleared of all sporophores ¾ in. or more in diameter each time a certain proportion of the sporophores present had become cups. Normal harvesting required 16–21 pickings in six weeks as against 4–9 for the other harvesting procedures.The method of picking did not usually affect the total weight of the crop, but the proportions of buttons, cups and flats varied considerably as did average weight per sporophore within each of these grades.It was not possible to determine whether a relation previously found between weight of crop and average weight per sporophore, when all sporophores from a plot are picked at the same stage of maturity, is valid when the sporophores picked from a plot include a wide range of stages.The possibility of introducing new methods of harvesting, including mechanical aids, is discussed. 相似文献
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改良热硼酸小量法提取番木瓜果肉总RNA 总被引:1,自引:0,他引:1
通过改良热硼酸小量法提取两个发育时期的番木瓜果实果肉总RNA.结果表明,这种方法能排除番木瓜果肉中多糖、木瓜蛋白酶、色素等物质的干扰,提取到高质量RNA,OD260/OD280在1.7~2.0之间,RNA完整,无DNA、蛋白质等污染.经检验,可以用于后续cDNA-AFLP等分子生物学实验. 相似文献
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以糙皮侧耳、肺形侧耳、淡红侧耳等侧耳属的3种平菇为试材,采用在培养料中添加0%、2%、4%和6%的熟石灰对其进行熟料栽培的方法,研究熟石灰添加量对平菇菌丝生长、子实体产量及钙含量的影响,以期为平菇的生产及相关研究提供参考依据。结果表明:在栽培料中添加2%~4%的熟石灰能显著促进平菇菌丝的生长。当熟石灰添加量为2%时,秀珍菇的产量和生物效率最高,分别为198.20 g·袋^-1和104.32%;当熟石灰添加量为4%时,平菇和红平菇的产量和生物效率最高,其产量分别为180.60、241.87 g·袋^-1,生物学效率分别为95.05%、127.30%。不同熟石灰添加量栽培获得的子实体钙含量在0.13~0.30 g·kg^-1,但不呈现出规律性,熟石灰添加量对平菇子实体的钙含量影响不明显。综合各项指标表明,在平菇栽培料中添加2%~4%的熟石灰较为合适,具体添加量因品种而异,熟石灰添加量不影响平菇子实体的钙含量。 相似文献
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黄芩中天然防晒剂的索氏提取工艺研究 总被引:3,自引:2,他引:1
以确定黄芩药材中总黄酮类化合物提取的最佳提取条件为目的.以黄芩总黄酮得率为参考指标,采用单因素试验和正交设计法对提取时间(4、5、6 h)、溶剂中乙醇用量(60、80、100 mL)以及物料粒径数(10~40、40~70、70目)等影响因素进行考察,确定最优提取条件.结果表明:提取黄芩药材中黄酮类成分的最佳提取方案为乙醇用量100 mL,提取6 h,物料粒径数为40~70目.通过方差分析发现3个因素对黄芩的提取影响都不显著.乙醇索氏提取法简便、省时、经济,在测定总黄酮时可以考虑用乙醇索氏法来提取.试验为防晒霜的配置提供了一定的试验基础. 相似文献