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1.
本文讨论了对带瘤小鼠注射香菇多糖、松口蘑多糖和羊脾RNA后,活体内有关组织中cAMP含量与抑瘤率之间的关系。 结果表明,上述活性物质不仅增强了机体免疫活性,同时亦促使机体内脾、瘤等组织的cAMP增高,此种增高,与抑瘤率成正相关。 相似文献
2.
In the evergreen Fagaceae forests of Japan, an ectomycorrhizal fungusTricholoma bakamatsutake forms shiros or developing mycelial blocks. To determine the physiological characteristics of the mycelial blocks, organic acids of the soil and major nutrient elements of the soil and roots were compared at three types of sites: presently colonized mycelial blocks, previously colonized sites behind the blocks, and uncolonized sites in front of the blocks. The upper part of the mycelial blocks showed the following features compared with the uncolonized site: lower pH (5.1), higher concentrations of oxalic and gluconic acids, lower content of total nitrogen, a similar amount of total carbon, reduced total and available phosphorus, higher content of total calcium and lower content of exchangeable calcium. These findings suggested that the activity of the fungus led to soil acidification by the organic acids, an increase in C/N ratio, depletion of phosphorus and accumulation of calcium. 相似文献
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4.
林芝地区松茸营养成分分析及松茸多糖的提取分离 总被引:4,自引:0,他引:4
以林芝地区5个样点采集的野生鲜松茸子实体为材料,对水分、粗蛋白、粗脂肪、粗纤维、粗多糖、氨基酸、灰分、VC及矿质元素的含量、有效成分进行测定,并以正交法确定了松茸多糖提取的最佳工艺条件。结果表明:各组分的平均质量分数分别为89.45%、12.02%、7.74%、7.84%、9.53%、8.67%、5.76%、0.5046 mg.g-1;矿质元素中K、P含量较高,平均24.063mg.g-1、5.278 mg.g-1,Zn含量高于其它常见食用菌子实体,平均0.5648 mg.g-1,Ca的含量偏低,平均0.4356 mg.g-1;同时含有甾体等有效成分。松茸多糖提取主次因素和最优工艺为乙醇体积分数85%、料水比为1:10、温度80℃、时间4 h,在此条件下粗多糖得率为8.98%。 相似文献
5.
5种珍稀食药用真菌活性提取物对果蝇寿命影响的研究 总被引:4,自引:0,他引:4
探讨了松茸、栎金钱菌、蜂窝菌、云芝、杏鲍菇活性提取物对果蝇寿命的影响,分别用这5种食药用真菌活性提取物各以5、20g/L的剂量加入培养基中培养果蝇,观察其对果蝇寿命的影响.结果表明,松茸、栎金钱菌、蜂窝菌、云芝、杏鲍菇的活性提取物能显著延长果蝇的平均寿命和半数死亡时间,其平均寿命延长率分别达23.96%、53.22%、23.09%、32.58%、20%.这提示松茸、栎金钱菌、蜂窝菌、云芝、杏鲍菇都具有良好的延寿效果. 相似文献
6.
Mizuho Kusuda Mitsuhiro Ueda Yasuhito Konishi Yoshihito Araki Katsuji Yamanaka Masami Nakazawa Kazutaka Miyatake Takao Terashita 《Mycoscience》2006,47(4):184-189
We investigated extracellular carbohydrase production in the medium of an ectomycorrhizal fungus, Tricholoma matsutake, to reveal its ability to utilize carbohydrates such as starch as a growth substrate and to survey the saprotrophic aspects.
We found β-glucosidase activity in the static culture filtrate of this fungus. The β-glucosidase was purified and characterized.
The purified enzyme was obtained from about 2.1 l static culture filtrate, with 9.0% recovery, and showed a single protein
band on SDS-PAGE. Molecular mass was about 160 kDa. The enzyme was most active around 60°C and pH 5.0, and stable over a pH
of 4.0–8.0 for 30 min at 37°C. The purified enzyme was activated by the presence of Ca2+ and Mn2+ ions (about 2–3 times that of the control). The enzyme readily hydrolyzed oligosaccharides having a β-1,4-glucosidic linkage
such as cellobiose and cellotriose. However, it did not hydrolyze polysaccharides such as avicel and CM-cellulose or oligosaccharides
having an α-glucosidic linkage. Moreover, cellotriose was hydrolyzed by the enzyme for various durations, and the resultant
products were analyzed by TLC. We concluded that the enzyme from T. matsutake seems to be a β-glucosidase because cellotriose with a β-1,4-glucosidic linkage decomposed to glucose during the enzyme reaction. 相似文献
7.
David Arora 《Economic botany》2008,62(3):278-290
The Houses That Matsutake Built. In the mountains of northwest Yunnan, China, a valuable mushroom, matsutake or song rong (Tricholoma matsutake) was commodified in the 1980s. Since that time, it has been exported in large quantities to Japan. The sale of matsutake
now contributes more to the income of Shangri-la County (Diqing Autonomous Tibetan Prefecture) than any other crop, including
timber and livestock. During the 1980s and 1990s, villagers in this remote region used their mushroom earnings to build spacious,
beautiful new houses in the traditional local (Kham) style, and in some cases to buy motor vehicles or open businesses. In
villages with access to productive matsutake habitat, virtually every household was able to build a new house; entire villages
were transformed. During the 1990s, several villages developed locally based management regimes to enhance production and
to address the problems and conflicts that arose from the harvest of such a valuable product. More recently, government agencies
and NGOs have played a highly visible role in promoting “sustainable” harvest policies. The implications of their involvement
are briefly examined and the future of matsutake harvest in Yunnan is discussed. 相似文献
8.
松茸多糖抗辐射功能的初步研究 总被引:3,自引:0,他引:3
预防给予小鼠松茸多糖(PTM),测定小鼠在受到2 Gy X线照射后,脾和胸腺重量、T淋巴细胞转化能力、外周血中白细胞数和肝组织中SOD、CAT、GSH-Px活性及MDA含量的变化,结果显示PTM处理组小鼠的各项指标与辐射对照组比较均有显著性差别,提示PTM可促进机体自由基的清除,增加机体抗氧化能力,对辐射所致的免疫损伤有明显的保护作用。 相似文献
9.
松茸的营养生理及培养基的筛选 总被引:3,自引:0,他引:3
采用分离自吉林延边的松茸菌种研究了松茸的营养生理及培养基筛选。结果表明:松茸对单糖、双糖、多糖和糖醇都有一定的利用,但葡萄糖、果糖、甘露糖等单糖对菌丝生长效果较好;氮源以谷氨酸胺、(NH4)2HPO4、酒石酸铵等氨态氮较为适合。松茸菌丝在较宽C/N比范围内都可生长,以C/N比21~66为佳。KH2PO4、MgSO4·7H2O、VB2、VB6对松茸的生长促进效果明显是菌丝生长所必需的。新筛选的11号培养基和已有松茸培养基比较,除生长速度有所提高外,气生菌丝大为增多,生长茂盛。 相似文献
10.
从洛巴口蘑培养滤液中分离出一种具有抗肿瘤活性的多糖蛋白复合物(PSPC)。PSPC在细胞水平有能力恢复和增强带瘤鼠腹腔浸出细胞的吞噬功能和T细胞的促分裂活性。在分子水平,PSPC能恢复带瘤鼠脾细胞和腹腔浸出细胞内IFN-γ基因的表达水平。另外,PSPC能够下调带瘤鼠脾细胞内“抗细胞因子”TGF-β的表达水平。因此,PSPC的抗肿瘤机制可归咎于寄主介导的免疫调节作用。 相似文献