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《生物质化学工程》2002,(1)
Z0 2 1 0 0 1 香菇菌糠及柄蒂提取物制备生物农药及其工艺 公开号 :CN 1 2 691 3 7A ,公开日 :2 0 0 0 .1 0 .1 1 将菌糠与香菇柄蒂分别浸泡于热水中 ,分离出浸液 ,并对菌糠浸液进行真空减压蒸发浓缩 ,对香菇柄蒂浸液进行酶解、灭活及浓缩。不仅防治单一植物病毒病害 ,还扩大到兼防真菌、细菌病害和生理病害等。Z0 2 1 0 0 2 防治植物病害的组合物 公开号 :CN 1 2 691 4 0A ,公开日 :2 0 0 0 .1 0 .1 1 本发明对农作物、果树、花卉等明显具有促进生长、提高结实 (果 )率、增加产量及改善品质等作用 ,并能有效防治由真菌、细… 相似文献
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药用植物内生真菌多糖研究进展 总被引:1,自引:0,他引:1
真菌多糖具有多种生理活性,广泛应用于医药、农业、食品等行业。基于植物内生真菌生长过程中会产生与宿主相同或相似的生理活性成分,药用植物生理活性的多样性赋予了其内生真菌活性的多样性,药用植物内生真菌是开发新型天然活性多糖的资源宝库。综述了近些年来关于药用植物内生真菌作为诱导子调节植物生长、代谢及其体外抗氧化、抗肿瘤、抑菌、降血糖等多种生理作用的研究进展。并对今后的研究方向进行展望,以期为药用植物内生真菌多糖的开发利用提供参考。 相似文献
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采用碱提取法,确立了香菇最佳提取条件:香菇与碱液比为1:10,温度为85.90℃及提取时间为6h。香菇经碱溶液提取、醇析、Savage法脱蛋白等步骤处理后得两份物质;再经分离纯化、纸层析测定单糖组成,紫外扫描测定多糖特征吸收峰及红外扫描测定糖苷键构型等实验,证实它们均为多糖,且为双糖。 相似文献
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多糖的提纯及生物活性的研究 总被引:1,自引:0,他引:1
多糖又称多聚糖(polysaccharide),由单糖聚合而成,是聚合度大于10的极性复杂大分子,其分子量一般为数万甚至达数百万。它作为来自高等动植物细胞膜和微生物细胞壁的天然高分子化合物,是构成生命活动的4大基本物质之一。目前已发现的活性多糖有几百种,按其来源不同,可分为真菌多糖、高等植物多糖、藻类地衣多糖、动物多糖、细菌多糖5大类。 相似文献
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1.引言真菌在进化过程中逐渐演化出对各种有毒化合物的不敏感性或耐受性,这些有毒化合物可能是天然毒素如微生物产生的抗生素,或者是植物病原菌特异性的植物防卫素。此外,植物和哺乳动物病害的化学防治还使得真菌不断经受各种人工合成性抗菌化合物(医药品、杀菌剂和抗真菌药物)的选择作用,同时真菌还可能需要适应自己产生的内源性有毒物质如抗生素和真菌毒素,使自身在生境中处于竞争优势。 相似文献
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The transport properties of ionic liquids (ILs) are crucial properties in view of their applications in electrochem-ical devices. One of the most important advantages of ILs is that their chemical–physical properties and conse-quently their bulk performances can be well tuned by optimizing the chemical structures of their ions. This will require elucidating the structural features of the ions that fundamentally determine the characteristics of the nanostructures and the viscosities of ILs. Here we showed for the first time that the“rigidity”, the order, and the compactness of the three-dimensional ionic networks generated by the anions and the cation head groups determine the formation and the sizes of the nanostructures in the apolar domains of ILs. We also found that the properties of ionic networks are governed by the conformational flexibility and the symmetry of the anion and/or the cation head group. The thermal stability of the nanostructures of ILs was shown to be con-trolled by the sensitivity of the conformational equilibrium of the anion to the change of temperature. We showed that the viscosity of ILs is strongly related to the symmetry and the flexibility of the constitute ions rather than to the size of the nanostructures of ILs. Therefore, the characteristics of the nanostructures and the viscosities of ILs, especially the thermal stability of the nanostructures, can be fine-tuned by tailoring the symmetry and the conformational flexibility of the anion. 相似文献
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Investigation of the effects of fatty acids on the compressive strength of the concrete and the grindability of the cement 总被引:1,自引:0,他引:1
In cement industry, a great energy consumption has been observed during grinding of clinker. To reduce this consumption, some waste products have been used as grinding aids.In this investigation, the effects of sunflower oil (SO), oleic acid (OA), stearic acid (SA), myristic acid (MA) and lauric acid (LA) on the fineness and strength of the cement have been examined. These aids were added into clinker in certain ratios based on the cement clinker weight and the grinding has been done for a definite time at the same condition.All of the fatty acids used increased the fineness as compared with the cement without the grinding additives. SO and OA decreased the strength significantly, LA decreased it to a lesser extent and SA increased it definitely according to the common cement. But MA did not alter the strength of the cement as much as SA. In addition, the covering of the balls influences the grinding of cement clinker unfavourably. 相似文献
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Polyurethaneureas (PUU), which were synthesized from 4,4′-diphenylmethane diisocyanate (MDI), poly(ethylene glycol) (PEG), and 3,5-diaminobanzoic acid (DABA), were used as polyelectrolytes in this study. Differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FT-IR) were used to monitor the effect of the various kinds of PEG on the changes in morphology of PUU electrolytes corresponding to the concentration of lithium perchlorate (LiClO4) dopants. The results of DSC and FT-IR indicate the Li+ ions coordinate with the soft and hard segments. Additionally, the crystallinity of the PEG soft segment and the ordered hydrogen-bonded urea carbonyl groups decreased with increasing salt concentration. Impedance spectroscopy (IS) measurements show that the PUU electrolyte with the high phase separation degree has the high ionic conductivity. The hard-segment Tg and the soft-segment Tm influence the conductivity behavior of polyelectrolytes with increasing measurement temperature. 相似文献
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In spinning basalt fibres, the drafting force is in the same range as in spinning of glass fibres. The effect of the drafting
force can not be considered in the calculation for the strength and rigidity of the bottom of the spinneret.
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Translated from Khimicheskie Volokna, No. 5, pp. 47–50, September–October, 2007. 相似文献