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Nodulation and molecular characterization of pure culturesisolated from root nodules of Coriaria nepalensis

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Chinese Science Bulletin 1998年第8期43卷 695-698页

作者： Chuanjiong Hu Pingzhen zhou Qi zhou Huakui Chen A. D. l. Akkermans Huazhong Agr Univ Coll Life Sci & Technol Wuhan 430062 Peoples R China Chinese Acad Agr Sci Inst Oil Crops Wuhan 430062 Peoples R China Agr Univ Wageningen Dept Microbiol NL-6703 CT Wageningen Netherlands

Four strains with typical morphology of actinomycete genus of Frankia were isolated from root nodules of Coriaria nepalensis. They were shown to nodulate the seedlings of host plant and hybridize with Frankia 16S rRNA targeted oligonucleotide probes, indicating that they did belong to the genus Frankia. Furthermore, by nifHDK probe hybridizations, the homologous fragments of nifHDK genes were detected among the bacteria, and they were located in various sizes of restriction fragments of total DNA, showing diverse patterns of restriction fragment length polymorphisms of nifHDK gene (nifHDK_RFlPs). The PCR_based amplification and cloning of nifH gene throw light on the molecular phylogeny of Coriaria_infective Frankia.

关键词： Frankia Coriaria nepalensis nodulation molecular characterization.

Dr. Samuel J. Klempner: collaborations with Asian countries speed up gastric cancer research

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Hepatobiliary Surgery and Nutrition 2019年第1期8卷 82-83页

作者： Brad li Silvia l zhou

Expert's introduction Samuel ***,MD,currently serves as the Director of GI Oncology and Precision Medicine at The Angeles Clinic and Research Institute,Samuel Oschin Comprehensive Cancer Institute,Cedars-Sinai Medical Center in the United States(Figure 1).He is a clinical and translational researcher focusing on experimental therapeutics in solid tumors,particularly upper gastrointestinal malignancies.

关键词： Cancer gastric Medicine

Spray granulation of Fe and C nanoparticles and their impedance match for microwave absorption

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Journal of Materials Science & Technology 2018年第3期34卷 496-502页

作者： H.Huang Y.Gao C.F.Fang A.M.Wu x.l.Dong B.S.Kim J.H.Byun G.F.Zhang D.Y.zhou Key laboratory of Materials Modification by laser Ionand Electron Beams(Ministry of Education)School of Materials Science and EngineeringDalian University of TechnologyDalian116024China Composites Research Division Korea Institute of Materials Science797 Changwon-daeroSeongsan-guChangwonGyeongnam642-831Republic of Korea

The microwave absorbents of Fe and C nanoparticles as magnetic loss and dielectric loss material respectively were composited with the polyvinyl alcohol （PVA） as binder by spray granulation method, The electromagnetic parameters of Fe and C composite particles were analyzed by vector network. The complex permittivity and magnetic permeability of Fe and C composite particles matched well with increasing C nanoparticle content, and then the microwave loss property was improved. A minimum reflection loss （Rl） of -42.7 dB at 3.68 GHz for a composite with 4.6 mm in thickness can be obtained when the content ratio of the C nanoparticles, the modified Fe nanoparticles and the PVA is 21：49：30 （Sample 3）.

关键词： Dielectric loss Magnetic loss Spray granulation method Impedance match

Editor profile:Guest editor of special issue “Bile Acids and Nuclear Receptors in Digestive System and Therapy”

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Acta Pharmaceutica Sinica B 2015年第2期5卷 91-92页

作者： Guo G.l. zhou H. Department of Pharmacology and Toxicology School of Pharmacy at the Rutgers University New Jersey United States Department of Microbiology and Immunology Virginia Commonwealth University Richmond VA United States

Associate *** liejun Guo is a tenured faculty in the Department of Pharmacology and Toxicology in the School of Pharmacy at the Rutgers University in New Jersey,*** graduated from the West China University of Medical ... 详细信息

关键词： Ph Bile Acids and Nuclear Receptors in Digestive System and Therapy Editor profile

Optimization of Adaptive Transit Signal Priority Using Parallel Genetic Algorithm

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Tsinghua Science and Technology 2007年第2期12卷 131-140页

作者： Guangwei zhou Albert Gan l. David Shen HDR Engineering Inc. Tampa Florida 33607 USA lehman Center for Transportation Research Florida International University Miami Florida 33174 USA College of Engineering and Computing Florida International University Miami Florida 33174 USA

Optimization of adaptive traffic signal timing is one of the most complex problems in traffic control systems. This paper presents an adaptive transit signal priority （TSP） strategy that applies the parallel genetic algorithm （PGA） to optimize adaptive traffic signal control in the presence of TSP. The method can optimize the phase plan, cycle length, and green splits at isolated intersections with consideration for the performance of both the transit and the general vehicles. A VISSIM （VISual SIMulation） simulation testbed was developed to evaluate the performance of the proposed PGA-based adaptive traffic signal control with TSP. The simulation results show that the PGA-based optimizer for adaptive TSP outperformed the fully actuated NEMA control in all test cases. The results also show that the PGA-based optimizer can produce TSP timing plans that benefit the transit vehicles while minimizing the impact of TSP on the general vehicles.

关键词： adaptive traffic signal control transit signal priority parallel genetic algorithm traffic simulation traffic delay

DMMF: Dominant and Max-Min Fair Allocation in Satellite Networks

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China Communications 2015年第S2期12卷 149-154页

作者： lIN Fuhong ZHENG Yi zhou xianwei lü xing School of Computer and Communication Engineering University of Science and Technology Beijing Network Technology Research Institute China United Network Communications Corporation Limited School of Science Beijing Jiaotong University

Resource allocation is crucial for satellite networks. In this paper, we propose a multi-resource fair allocation scheme, namely Dominant and Max-min Fair(DMMF), to efficiently and fairly allocate resources. It consists of two allocation stages, dominant resource fair(DRF) allocation stage and max-min fairness(MMF) allocation stage. The proposed DMMF scheme exhibits desirable properties, including share incentive, strategy proofness, envy freeness and Pareto optimality. Meanwhile, DMMF can improve the allocation efficiency and reach 100% allocation efficiency.

关键词： dominant resource fair(DRF) max-min fair(MMF) network efficiency satellite network

Photosynthetic and Respiratory Acclimation to Experimental Warming for Four SpeCies in a Tallgrass Prairie Ecosystem

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Journal of Integrative Plant Biology 2007年第3期49卷 270-281页

作者： xuhui zhou xiaozhong liu linda l. Wallace Yiqi luo Department of Botany and Microbiology University of Oklahoma Norman Oklahoma 73019 USA

Global temperature has been Increased by 0.6 ℃ over the past century and is predicted to Increase by 1.4-5.8 ℃ by the end of this century. It is unclear what impacts global warming will have on tallgrass species. In the present study, we examined leaf net photosynthetic rate （P.） and leaf respiration rate in darkness （Rd） of Aster erlcoldes （l.） Nesom, Ambrosia psllostachya DC., Helianthus mollis lam., and Sorghastrum nutans （l.） Nash In response to experimental warming in a tallgrass prairie ecosystem of the Great Plains, USA, in the autumn （fall） of 2000 and through 2001. Warming has been Implemented with infrared heaters since 21 November 1999. The P. increased significantly In spring, decreased in early fall, and did not change in summer and late fall in the four species under warming compared with control. The Rd of the four species increased significantly until mid-summer and then did not change under warming. Measured temperature-response curves of P. showed that warming Increased the optimum temperature of P. （Topt） by 2.32 and 4.59 ℃ for H. mollis and S. nutans, respectively, in August, whereas there were no changes in May and September, and A. ericoldes and A. psllostachya also showed no changes in any of the 3 months. However, P. at optimum temperature （Popt） showed downregulation in September and no regulation in May and August for all four species. The temperature-response curves of Rd Illustrate that the temperature sensitivity of Rd, Q10, was lower in the warmed plots compared with the control plots, except for A. ericoides in August, whereas there were no changes In May and September for all four species. The results of the present study indicate that photosynthetic and respiratory acclimation varies with species and among seasons, occurring In the mid-growing season and not in the early and late growing seasons.

关键词： acclimation Ambrosia psilostachya climatic warming photosynthesis respiration Sorghastrum nutans tallgrass prairie temperature

Effect of Training on Two-way Shape Memory Effect and Its Stability in a Ti-Ni-Hf High Temperature Shape Memory Alloy

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Journal of Materials Science & Technology 2003年第6期19卷 590-592页

作者： xianglongMENG WeiCAI K.T.lAU l.M.zhou lianchengZHAO SchoolofMaterialsScience&Engineering HarbinInstituteofTechnologyHarbin150001China DepartmentofMechanicalEngineering TheHongKongPolytechnicUniversityHungHomKowloonHongKongChina

The Effect of the thermal cycling training under constant strain on the two-way shape memory effect (TWSME) in a Ti36l\li49Hf15 high temperature shape memory alloy (SMA) has been investigated by bending tests. The results indicated that the training procedure is beneficial to get the better TWSME. The two-way shape memory strain increases with increasing the training strain. And it decreases with increasing the training temperature. The TWSME obtained in the present alloy shows poorer stability compared with that obtained in the TiNi alloys.

关键词： TiNiHf alloy High temperature shape memory alloy Two-way shape memory effect Training

Evolution of vegetation and climate since the last glacial maximum recorded at Dahu peat site, South China

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Science China Earth Sciences 2007年第8期50卷 1209-1217页

作者： xIAO JiaYi lü HaiBo zhou WeiJian ZHAO ZhiJun HAO RuiHui Department of Geographical Science Nanjing Normal UniversityNanjing 210046China State Key laboratory of loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy of SciencesXi’an 710075China Department of History and Civilization Weinan Normal UniversityWeinan 714000China

Sporopollen analysis on a 346 cm peat record at Dahu, Jiangxi, chronologically constrained by 16 AMS 14C datings, provides an opportunity to reconstruct the vegetation evolution stages responding to cli-mate change in South China since the last glacial maximum. The result shows that during 18330-15630 cal a B.P., broad-leaved forest dominated the area, corresponding to mild, cool and fairly humid climate. At the interval of 15630-11600 cal a B.P., several evergreen broad-leaved species appeared within the broad-leaved forest, indicating moderate and humid condition. During early Holocene, broad-leaved evergreen forest community was constructed as Castanopsis/lithorcarpus principally developed, suggesting a warm and humid scenario until 6000 cal a B. P. Since 6000 cal a B. P., abrupt forest deterioration happened with an contemporary increase of fern and herb communities, repre-senting a turnover to relatively cool and dry condition and as well, possible impact from human activi-ties. Meanwhile, several relatively cool and dry events can be identified in the sporopollen record, they can be correlated to the North Atlantic Heinrich event, YD and Holocene millennial-scale oscillations, implying that the low latitude climate was coupled with high latitude influences. Moreover, the varia-tions of temperature and humidity since lGM at Dahu were much smaller when compared with the re-cords in north monsoonal China.

关键词： peat site sporopollen analysis paleovegetation paleoenvironment