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Search Results: 1 - 10 of 286747 matches for " <br>唐依莉 "
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Isolation and environmental adaptation of endophytic Actinomycetes in Acanthus ilicifolius of different mangrove
不同红树林地区老鼠簕内生放线菌的分离及其环境适应性

TANG Yi-Li,WANG Rong,HONG Kui,<br>,王蓉,洪葵
微生物学通报 , 2012,
Abstract: Objective] To investigate geographical distribution of Acanthus ilicifolius endo-phytic actinomycetes of different mangrove regions,and their environmental adaptation.Methods] Endophytic actinomycete strains were isolated from different part of Acanthus ili-cifolius plant collected from 5 mangrove sites using 9 different selective isolation media.Iso-lates were identificated to genus level using 16S rRNA gene sequence analysis.NaCl tolerance was tested using ISP 2 liquid medium supplement with different NaCl concentrations.Potential of nitrogen-fixation isolates were surveyed using nitrogen-free medium.Results] A total of 52 endophytic actinomycete strains were successfully isolated from Acanthus ilicifolius plant,among which 5 isolates were from surface-sterilized leaves,2 isolates from stems and the re-maining 45 isolates were from roots.Analysis of 16S rRNA gene sequences of these isolates showed that they belonged to members of the genera Jishengella(1 isolate),Micromonospora(47 isolates),Streptomycetes(3 isolates) and Verrucosispora(1 isolate).Forty eight isolates were halo-tolerant or halophilic,including 18 isolates exhibited highest tolerance come up to 20% NaCl,4 isolates can’t grow in salt-free medium,and 12 isolates exhibited good growth in presence of 3.3% NaCl.Meanwhile,4 strains can grow on nitrogen-free medium that showed potential of nitrogen-fixation.Conclusion] Analysis of 47 Micromonospora isolates from 5 mangrove locations indicated that there were different endophytic Micromonospora groups of Acanthus ilicifolius among different geographical sites.The results obtained revealed the en-vironmental adaptation of the Acanthus ilicifolius endophytic actinomycetes.
模拟太阳光-过氧化氢作用下冰相中苯酚的光转化
晓剑,,康春,刘汉飞,陈柏言,裘式纶
- , 2015,
Abstract: 摘要 以模拟太阳光为照射光源, 对冰相中苯酚在过氧化氢(H2O2)存在条件下的光转化反应进行了研究, 考察了影响苯酚光转化反应的主要因素并探讨了光转化动力学过程. 研究结果表明, 光强度越高或H2O2初始浓度越大, 苯酚在冰相介质中的光转化率越快, 而苯酚初始浓度越高则会导致苯酚的光转化率减慢. pH值对苯酚的光转化率的影响则表现为酸性导致减小, 碱性导致加快. 应用气相色谱-质谱联用仪(GC-MS)分析了苯酚的光解产物, 推断苯酚在冰相中的光解过程中主要发生了羟基化反应
Modeling the supply of water services: the application of minimum data approach in Ganzhou District, Heihe River
生态系统服务供给量的确定——最小数据法在黑河流域中游的应用

TangZeng,<br>,黄茄,徐中民
生态学报 , 2010,
Abstract: 确定生态系统服务供给量与付费标准是进行生态系统服务付费研究的关键问题。最小数据方法是一个推导生态系统服务供给曲线的数学模型,该模型通过分析土地利用收益的空间分布,计算出生态系统服务机会成本的空间分布,从而推导出生态系统服务供给曲线。介绍了最小数据方法,然后以黑河流域张掖市甘州区为例,以植被蒸散发量的减少表征生态系统服务,通过调查获得机会成本的空间分布,利用最小数据方法推导了水资源服务供给曲线。结果表明:随着补偿价格的提高,农业部门提供的水资源服务逐渐增加。当补偿价格从0.067元 m-3(农业用水价格)提高到3元m-3(建筑用水水价),农业部门提供的水资源服务由2.08×106m3 a-1增加到2.7×108m3 a-1。这表明,采用生态系统服务付费政策可以有效减少农业用水量,同时这也为补偿标准的制定提供一种新的思路。
工控机二模容错系统结构设计

福州大学学报(自然科学版) , 1995,
Abstract: 从计算机体系结构观点,提出一个STD总线工控机二模容错计算机系统。介绍该系统的设计原则、硬件结构和容错管理软件结构。
丙型肝炎病毒在辅助生殖技术中的存在与垂直传播
尤佳,
- , 2015, DOI: 10.3785/j.issn.1008-9292.2015.05.17
Abstract: 垂直传播是儿童感染丙型肝炎病毒(HCV)的主要方式,近年来受到广泛关注。随着辅助生殖技术的发展,越来越多的HCV感染不孕夫妇寻求辅助生殖技术治疗以获得后代。辅助生殖技术过程中HCV的垂直传播现象仍不可避免,了解HCV在母体和胚胎内的存在与风险,有利于在解决生育问题的同时更好地控制HCV的垂直传播,预防儿童感染。
Abstract: Vertical transmission is the major route of HCV infection in children and draws much attention recently. With the development of assisted reproductive technology (ART), more and more HCV-serodiscordant infertile couples seek assisted reproduction treatment. Vertical transmission of HCV in ART cannot be avoided. Understanding the state of HCV infection of oocyte and embryo is helpful to solve the fertility problem and to control mother-to-child transmission. Key words: Hepacivirus/immunology Hepatitis C/transmission Disease transmission, vertical Reproductive techniques, assisted Oocytes Fetal diseases Review
ICP dry etching ITO to improve the performance of GaN-based LEDs
采用ICP干法刻蚀ITO提高GaN基LED的特性

Meng Lili,Chen Yixin,Ma Li,Liu Zike,Shen Guangdi,<br>孟丽丽,,,刘自可,沈光地
半导体学报 , 2011,
Abstract: 针对常规双电极蓝宝石衬底GaN基LED,为了提高出光效率,在P-GaN表面生长一层ITO作为电流扩展层和增透膜。但是,在腐蚀ITO的过程中,经常会遇到ITO被侧向腐蚀的问题。本文中,通过湿法腐蚀得到的ITO薄膜大概被腐蚀掉6.43%~1/3的面积。这个问题可以通过ICP干法刻蚀来解决,ICP干法刻蚀能很好的改善ITO侧向腐蚀,并且工艺简单,能很好的改善LED器件的特性。得到的ITO薄膜边缘陡峭,面积完整,相较于湿法腐蚀ITO,在工作中ICP干法刻蚀ITO的LED,发光面积最少能提高6.43%,光强最高能提高45.9%。
Study on removal of SO2 from simulated flue gas using plasma and combined photocatalysis
等离子体协同光催化去除模拟烟气中SO2的实验研究

Yi Chengwu,Leng Qiuying,Sun Li,Chu Jinyu,Wu Chundu,<br>成武,冷秋颖,,储金宇,吴春笃
环境工程学报 , 2007,
Abstract: In recent years,the application of plasma and nanometer TiO2 photocatalysis in desulphurization has attracted more and more attention. The two techniques were combined in a packed bed reactor, and a lot of desulphurization experiments were done. The research results show that comparing with the single plasma technique,the SO2 removal rate of the combination technique is increased 5% -20%. The desulphurization mechanism of plasma and photocatalysis as well as the effects of factors such as input voltage,gas flow and initial concentration of SO2 on the removal rate of SO2 are discussed. The results show that the removal rate can reach 77.6% when the initial concentration is 800 mg/m^3 ,input voltage is 17.5 kV and gas flow is 0.2 m^3/h.
An approach to purification of toluene waste gas by a cross-flow bio-trickling filter
错流式生物滴滤床净化甲苯废气

Zhang Jing,Li Jian,Sun Li,Zhang Shujing,Jin Yuquan,Li Yili,<br>张京,李坚,,张书景,金毓峑,
环境工程学报 , 2008,
Abstract: 采用焦化厂污泥为菌源驯化甲苯降解菌,接种错流式生物滴滤床,净化含甲苯废气。研究了生物滴滤床的挂膜启动和长期运行情况,填料和营养液对滴滤床去除能力的影响,并对长期运行的压降进行了观察分析。反应器挂膜启动需要6 d时间,稳定运行的平均去除效率为95%,单位体积最大去除负荷为251 g/(m3·h)。结果表明,采用错流式生物滴滤床可以有效去除甲苯废气;以比表面积大的生物陶粒作为填料以及定期适量更换营养液,均有助于提高生物滴滤床的去除能力;错流式生物滴滤床具有压降小、气液分布均匀的特点。
异小杆线虫发光共生细菌两种型的生物学研究
,戴冠群
微生物学通报 , 1989,
Abstract: 异小杆线虫发光共生细菌两种型(初生型和次生型)的形态和绝大多数生理生化及血清学反应均相同。它们的主要差异表现在培养特征、稳定性及对线虫繁殖的作用性上。如初生型菌能使线虫在人工培养基上大量繁殖,次生型菌却不能;初生型菌不稳定,易转化为较稳定的次生型。但不同的初生型菌株其稳定性又有差别;在NBTA、EMB及麦康凯培养基上,两种型的菌落区别明显。此外,所有初生型菌都具有抗菌作用,次生型菌只有部分菌株具有此性质,而且前者的抗菌谱较后者广。不同菌株的初生型,其抗菌能力有差别。
矿区地下水系统演化过程中混沌性态形成的条件及机理
,肖江
煤炭学报 , 2006,
Abstract: 以混沌理论为基础,提出了系统整体稳定性的3种状态、系统混沌性态形成的前提条件和确定性混沌与随机混沌所具有的差别.据此,进一步阐述了矿区地下水系统演化过程中所具有的不可逆性、非平稳性和结果的多样性;说明不仅要运用混沌和分形的理论和方法,还要考虑运用随机过程的有关理论和方法,才能进一步改善地下水量计算和预测难以符合实际情况的问题.
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