共查询到19条相似文献,搜索用时 140 毫秒
1.
虫草菌丝 :大量的研究表明 ,利用深层发酵生产的虫草菌菌丝与天然冬虫夏草具有相似的化学成分、药理作用和临床疗效 ,而毒性比天然者小 ,为用菌丝代替冬虫夏草提供了科学依据。目前 ,浙江、湖南几个厂家利用菌丝开发的金水宝胶囊、宁心宝胶囊等药物 ,经销国内外 ,深受人们喜爱。纯草 :纯草是指冬虫夏草的“草” ,即子实体或子座。据研究 ,纯草与冬虫夏草药理作用相同 ,药效成分虫草素、虫草多糖、甾醇等含量优于天然虫草 ,毒性小。目前培育纯草有多种配方 :一种是含蛋白胨的固体培养基 ,采用瓶栽培养 ,接种虫草菌后 ,培育 6个月 ,便可长出子… 相似文献
2.
3.
本研究从某农药厂污水处理池的活性污泥中分离得到1株能以乙羧氟草醚为唯一碳源生长的菌株。经生理生化鉴定和16SrRNA基因序列同源性分析,将此菌株初步鉴定为腐生葡萄球茵(Staphylococcussaprophyticus),并命名为YSC.1。对菌株YSC.1的生长特性研究表明:茵株的最佳生长温度和pH分别为30℃、7.0;NaCI浓度对菌株YSC-1生长有较大的影响。菌株在20℃-40℃之间均能降解乙羧氟草醚,在30%1、pH7.0的条件下对乙羧氟草醚的降解率最高;增加乙羧氟草醚的浓度会对菌株产生毒害作用,降低其降解率;提高接种量可以加快乙羧氟草醚的降解。在乙羧氟草醚终浓度为100mg/L的工业废水经7d处理后,乙羧氟草醚的去除率达91.62%,说明菌株YSC-1在废水处理中具有很好的应用前景。 相似文献
4.
微生物处理油田采出水技术已在各油田广泛应用,如何针对地层条件、区块采出水特性筛选适宜的采出水降解菌株需要进一步探讨。文章从长庆油田姬?油田某联合站采出水中分离纯化出5种微生物菌株,分别研究温度、酸碱性、盐度等条件对筛选菌株的影响,从而探讨菌株对该区块油藏条件的 适应性;结果表明5种菌株能够适应该区块油藏条件,其中A菌株生长繁殖趋势最好;进一步开展5种筛选菌株降解原油性能的实验,结果表明A菌株对石油类的降解率达到55.6%,可作为油田采出水降解菌菌株。 相似文献
5.
6.
《中国环境管理干部学院学报》2017,(3)
主要对污染土壤中吸附重金属锌菌株的筛选、鉴定进行研究。从污染土壤样品中富集培养微生物菌株,通过吸附率测定,得到4株锌吸附能力较高的菌株,分别命名为Zn A-4、Zn E-3、Zn H-2、Zn L-2,其中Zn H-2菌株对锌的吸附率最高,达到48.30%,其次是Zn L-2,吸附率为42.95%。通过常规细菌鉴定方法,从菌落形态特征、生理生化试验两方面对4株菌进行鉴定,初步鉴定这4株菌均为芽孢杆菌属。此功能性菌株有望在土壤污染原位固定技术中作为修复菌剂。 相似文献
7.
从威海近海采得的藻类植物经过破碎和分离筛选,得到一株产生黄色素的海洋细菌,编号为SS16.通过对SS16菌株的菌落形态观察和16SrRNA基因序列测定,分析结果显示该菌株为拉塞尔佐贝尔氏菌(Zobellia russellii).为了提高SS16菌株黄色素产量,采用单因素实验设计对SS16菌株进行发酵条件优化.结果表明,当发酵条件为蛋白胨和牛肉膏作为碳、氮源,pH6.78,盐度低于1%,以占摇瓶1/5的培养量在28℃条件下发酵培养48h,海洋细菌SS16所产黄色素的量达到最大. 相似文献
8.
合成洗涤剂能否引起基因突变,有无潜在危害,已引起人们的彬大关注,我们对成都产合成洗涤剂厂生产的双猫牌洗衣粉进行了Ames试验,结果表明,不同浓度的洗涤剂对TA98,TA102每组菌株的回变菌落数均未超过对应溶剂对照回变菌落数的2倍,说明双猫牌洗衣粉在受试浓度下,对所用菌株无诱变活性,即未发现该产品具有致突变作用。 相似文献
9.
川西北草地位于四川西北部,青藏高原东南缘,地跨甘孜、阿坝2个自治州和凉山州的部分地区,系全国5大牧区之一。川西北草地资源分布广、面积辽阔,现有草地1600多万 ha,约占全省土地总面积的1/4,为全省耕地面积的2倍多。但川西北草 相似文献
10.
11.
Germination tests for assessing biochar quality 总被引:8,自引:0,他引:8
Rogovska N Laird D Cruse RM Trabue S Heaton E 《Journal of environmental quality》2012,41(4):1014-1022
Definition, analysis, and certification of biochar quality are crucial to the agronomic acceptance of biochar. While most biochars have a positive impact on plant growth, some may have adverse effects due to the presence of phytotoxic compounds. Conversely, some biochars may have the ability to adsorb and neutralize natural phytotoxic compounds found in soil. We evaluated the effects of biochars on seedling growth and absorption of allelochemicals present in corn ( L.) residues. Corn seeds were germinated in aqueous extracts of six biochars produced from varied feedstocks, thermochemical processes, and temperatures. Percent germination and shoot and radicle lengths were evaluated at the end of the germination period. Extracts from the six biochars had no effect on percent germination; however, extracts from three biochars produced at high conversion temperatures significantly inhibited shoot growth by an average of 16% relative to deionized (DI) water. Polycyclic aromatic hydrocarbons detected in the aqueous extracts are believed to be at least partly responsible for the reduction in seedling growth. Repeated leaching of biochars before extract preparation eliminated the negative effects on seedling growth. Biochars differ significantly in their capacity to adsorb allelochemicals present in corn residues. Germination of corn seeds in extracts of corn residue showed 94% suppression of radicle growth compared to those exposed to DI water; however, incubation of corn residue extracts with leached biochar for 24 h before initiating the germination test increased radicle length 6 to 12 times compared to the corn residue extract treatments. Germination tests appear to be a reliable procedure to differentiate between effects of different types of biochar on corn seedling growth. 相似文献
12.
13.
石油污染土壤中石油含量对玉米的影响 总被引:27,自引:1,他引:26
为了弄清石油污染土壤中石油类对农作物的影响,吉林油田进行了一年的田间玉米种植试验。在不同浓度水平,分别对玉米出苗率、可见外观特性、百粒重、产量和品质进行了较系统的观察、监测、类比分析。结果表明,土壤中石油含量的不同,对玉米生长过程各项指标有不同的影响。并找出吉林油田土壤—玉米系统中影响玉米生长及其产量的土壤临界含油量。 相似文献
14.
以大豆、玉米作为受体,通过对种子萌发指标和幼苗生长量的测定,探讨柳叶蜡梅叶片水浸提液的化感作用.结果表明,不同浓度的柳叶蜡梅水浸提液对两种受体的种子萌发和幼苗生长量均有不同程度的抑制作用,相对电导率和丙二醛含量增加.因此,柳叶蜡梅对大豆、玉米均有化感抑制作用. 相似文献
15.
以大豆、玉米作为受体,通过对种子萌发指标和幼苗生长量的测定,探讨柳叶蜡梅叶片水浸提液的化感作用。结果表明,不同浓度的柳叶蜡梅水浸提液对两种受体的种子萌发和幼苗生长量均有不同程度的抑制作用,相对电导率和丙二醛含量增加。因此,柳叶蜡梅对大豆、玉米均有化感抑制作用。 相似文献
16.
17.
18.
19.
R. Naraian R. K. Sahu S. Kumar S. K. Garg C. S. Singh R. S. Kanaujia 《The Environmentalist》2009,29(1):1-7
The cultivation of white rot edible fungus Pleurotus florida was performed in polybags. The corn cob was employed as basal substrate while eight different additives such as urea, ammonium
sulphate, gram flour, soybean meal, ground nut cake and molasses were used with corn cob. Three different levels of variable
combinations with corn cob were evaluated in response to different parameters of mushroom viz., mycelial growth, spawn running,
primordial initiation, fruit body yield and its biological efficiency. Each additive at different combinations showed variable
impact on the different stages of mushroom life cycle. The primordial initiation was observed for the first time during 20.2–35.1 days.
The biological efficiencies in every supplemented set were increased over un-supplemented control set. Increasing the level
of additives, the biological efficiency was negatively affected at higher levels. The cotton seed cake was found the best
supplement producing 93.75% biological efficiency while soybean meal was the second best additive producing 93.00% yield.
The highest growth rate, rapid mycelia run, early primordial initiation, highest yield and biological efficiency were recorded
in the combination of corn cob and cotton seed cake at 2% (98 + 2) level. 相似文献