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Optimization of Photo-Hydrogen Production by Immobilized Rhodopseudomonas Faecalis RLD-53

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Natural Resources 2011年第1期2卷 1-7页

作者： Bing-Feng Liu Guo-Jun Xie Wan-qian Guo Jie Ding Nan-qi ren 不详

In this work, the optimization of hydrogen production by photo-fermentation bacteria immobilized on agar gel granule was systematic investigated in batch culture. Experiment focus on the effect of some important affecting factors on photo-hydrogen production. Results indicated that immobilized Rhodopseudomonas faecalis RLD-53 exhibited the highest hydrogen yield of 3.15 mol H2/mol acetate under follow optimal condition: agar granule diameter of 2.5 mm, inoculum age of 24 h, agar concentration of 2%, biomass of 4 mg/ml in agar and light intensity of 9000 lux. More importantly, immobilized photo-fermentation bacteria not only can enhance hydrogen production but can increase acids-tolerance capacity, even at pH 5.0 hydrogen also was produced, and thus hopefully immobilized photo-fermentation bacteria can be applied in the combination of dark and photo-fermentation for hydrogen production with high yield.

关键词： Hydrogen Production Photo-Fermentation Agar Gel Immobilized Rhodopseudomonas Faecalis Acids-Tolerance Capacity

The larvae of Gnaptorina felicitana and Agnaptoria amdoensis of the tribe Blaptini from China(Coleoptera:Tenebrionidae)

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动物分类学报 2014年第2期39卷 275-282页

作者： Xi-Chao Zhu Guo-Dong ren College of Life Sciences of Hebei University Key Laboratory of Invertebrate Systematics and Application of Hebei Province

This paper describes the morphological data of the larvae of two species from the tribe Blaptini Leach, 1815. The two species are Gnaptorina felicitana Reitter and Agnaptoria amdoensis G. Medvedev, whose larvae have not been reported up to now. In this paper, morphological characters, informations of specimen, and character figures of the two species＇ larvae are provided. A key to the two genera and the reported species is listed here. The larvae specimens are deposited in the Museum of Hebei University.

关键词： Coleoptera Tenebrionidae Blaptini larva.

Harnessing“little mighty”cockroaches:Pest management and beneficial utilization

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The Innovation 2023年第6期4卷 17-18页

作者： Chonghua ren Nan Chen Sheng Li Guangdong Provincial Key Laboratory of Insect Developmental Biology and Applied Technology Guangzhou Key Laboratory of Insect Development Regulation and Application ResearchInstitute of Insect Science and Technology&School of Life SciencesSouth China Normal UniversityGuangzhou 510631China Guangdong Laboratory for lingnan Modern Agriculture Guangzhou 510631China Guangmeiyuan R&D Center Guangdong Provincial KeyLaboratory of Insect Developmental Biology and Aplied TechnologySouth China Normal UniversiyMeizhou 514779China

Rationale backs up cockroaches being“little mighty”.Cockroaches belong to the insect order Blattodea and often serve as model organisms for hemimetabolous *** occupy a pivotal evolutionary position in studies of insect *** emergence of the last common ancestor of all extant cockroaches may date back to approximately 235 million years *** are a highly successful group of insects:about 5,000 living species have been *** the seismic continental drift during the ancient transition from Pangaea,cockroaches have undergone substantial invasion and distribution to all continents worldwide.1 The American cockroach(Periplaneta americana)and the German cockroach(Blattella germanica)are the most common and are closely synanthropic species,referred to as“little mighty”(a household name,xiao qiang,in China)because of their extreme vitality and *** rationale behind cockroaches’being considered“little mighty”can be attributed mostly to four biological characteristics(Figure 1).

关键词： mostly continent Figure

Absolute Angular Displacement Determination Based on Laser-Frequency Splitting Technology

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Chinese Physics Letters 2012年第5期29卷 111-114页

作者： ren Cheng YANG Xing-Tuan ZHANG Shu-Lian Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education Institute of Nuclear and New Energy TechnologyTsinghua UniversityBeijing 102201 Department of Precision Instruments and Mechanology Tsinghua UniversityBeijing 100084

We introduce an angle measurement system based on laser-frequency splitting technology,which is capable of absolute angular displacement *** core part is a dual-frequency microchip Nd:YAG laser which has two quarter-wave plates in the laser resonator and outputs two orthogonally linearly polarized lights with variable intermode frequency.A rotation of one of the wave plates shifts the frequency difference between *** angular displacement can thus be examined by detecting the shift of the frequency *** principle of the dual-frequency laser is demonstrated.A setup developed to accomplish angular displacement determinations and the experimental results of using this setup are then presented.

关键词： Nd:YAG resonator displacement

Impact of the national hepatitis B immunization program in China:a modeling study

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Infectious Diseases of Poverty 2022年第5期11卷 99-100页

作者： Zhixi Liu Mengying Li David W.Hutton Abram L.Wagner Ye Yao Wenlong Zhu lingsheng Cao Shenglan Tang Jinhua Pan Yesheng Wang qi Zhao Hong ren Ying Wang Weibing Wang School of Public Health Shanghai Institute of Infectious Disease and BiosecurityFudan UniversityShanghaiChina Department of Social Medicine School of Public HealthFudan UniversityShanghaiChina 不详

Background:Elimination of hepatitis B virus(HBV)is a striking challenge for countries with high or moderate disease ***,using China as a practical case to share experiences for similar countries may accelerate the achievement of the WHO 2030 target of 90%reduction in HBV-related *** aim to evaluate the impact of national HBV immunization strategies in China;and the feasibility to achieve WHO 2030 targets under diferent ***:We constructed an expanded Susceptible-Exposed-Infectious-Recovered(SEIR)model and decision treeMarkov model to estimate the epidemic of HBV in China,assess the feasibility of 2030 Elimination Goals through the projections and conduct the economic *** square method was used to calibrate the expanded SEIR model by yearly data of laboratory-confrmed HBV cases from 1990 to *** models were separately used to evaluate the impact and cost-efectiveness of HBV vaccine by comparing prevalence of chronic HBV infections,qualityadjusted life-years(QALYs),incremental cost efectiveness ratio and beneft–cost ratio(BCR)under various intervention options,providing a basis for exploring new containment ***:Between 1990 and 2020,the number of chronic HBV infections decreased by 33.9%.The current status quo would lead to 55.73 million infections(3.95%prevalence)in 2030,compared to 90.63 million(6.42%prevalence)of the“Without the NIP”scenario(NIP:National Immunization Program),114.78 million(8.13%prevalence)without any *** prevention of mother to child transmission(PMTCT)strategy showed a net beneft as 12,283.50 dollars per person,with BCR as 12.66,which is higher than that of universal vaccination at *** with no screening and no vaccination,the PMTCT strategy could save 7726.03 dollars for each QALY ***:Our fndings proved the HBV vaccination has demonstrated a substantial positive impact on controlling the epidemic of HBV in terms of efectiveness and economy af

关键词： Hepatitis B National immunization program Prevalence Economic analysis Susceptible-ExposedInfectious-Recovered modeling

Acatulides A-G,neuroprotective macrolides from Acaulium album H-JQSF

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Chinese Chemical Letters 2024年第3期35卷 379-383页

作者： Zhi-Wu Tong Ting-Ting Wang Pei Yang Jia-lin Sun Chen-Peng Zhang Salman Khan Xin-Cun Wang Rui-Hua Jiao Hui-Ming Ge Wen-Ying Zhuang Gang Hu ren Xiang Tan State Key Laboratory of Pharmaceutical Biotechnology Institute of Functional BiomoleculesNanjing UniversityNanjing 210023China State Key Laboratory Cultivation Base for TCM Quality and Efficacy Nanjing University of Chinese MedicineNanjing 210023China Insitute of Microbiology Chinese Academy of SciencesBeijing 100101China

Fungal symbionts co-evolve with hosts and microbial co-inhabitants to acquire an unpredictable potential for producing novel bioactive metabolites,but the knowledge about the topic remains patchy and *** we present the chemical characterization of acatulides A-G(1-7)as architecturally unprecedented macrolides from the solid-state culture of Acaulium album H-JQSF,an arthropod-associated *** acatulide structures were elucidated by spectroscopic analysis,modified Mosher's method and single-crystal X-ray *** plausible biosynthetic pathways for compounds 1-4 are ***,acatulides B-D(2-4)and G(7)were demonstrated to be neuroprotective against the 1-methyl-4-phenylpyridinium(MPP+)-induced damage to SH-SY5Y cells and nematode Caenorhabditis elegans(***).

关键词： Acaulium album Macrolides Acatulides A–G Mosher’s method Neuroprotective

Geochemical Characteristics and Ore-Forming Environment in the Qujiashan Manganese Deposit, Shaanxi

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Acta Geologica Sinica(English Edition) 2017年第S1期91卷 237-238页

作者： WANG Ziyong HAN Runsheng ren Tao Kunming University of Science and Technology KunmingYunnan 650093

1 Introduction The Qujiashan manganese deposit is located in the northeastern margin of the Yangtze *** is an important part of qinba area,which is one of the nine manganese ore prospecting area(Luo,2002).Much

关键词： rock Shaanxi

Characterization of laser cooling in microgravity via long-term operations in TianGong-2 space lab

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National Science Review 2023年第4期10卷 69-75页

作者： De-Sheng Lü Wei ren Yuan Sun Tang Li qiu-Zhi Qu Bin Wang lin Li Jian-Bo Zhao Xin Zhao Jing-Wei Ji Mei-Feng Ye Jing-Feng Xiang Wei-Biao Chen Yu-Zhu Wang Liang Liu CAS Key Laboratory of Quantum Optics and Center of Cold Atom Physics Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Aerospace Laser Engineering Department Shanghai Institute of Optics and Fine MechanicsChinese Academy of Sciences

The invention of laser cooling has fundamentally influenced the research frontier of atomic physics and quantum physics, and recently an intense focus has been on the studies of cold atom physics in microgravity environments. Herein, we report the results of our laser cooling experiment in Tian Gong-2 space lab, which operated for 34 consecutive months in orbit. Over such an extended operation time, the quality of laser cooling did not experience any significant decline, while the properties of laser cooling in orbital microgravity were systematically studied. In particular, we demonstrate magneto-optical trapping and polarization-gradient cooling in orbit and carefully examine their performances. A comparison of the in-orbit and on-ground results indicates that a higher cooling efficiency exists in microgravity, including a smaller loss rate during the trapping and cooling process and lower ultimate temperature of laser-cooled atoms. Our progress has laid the technical foundations for future applications of cold atoms in space missions with operation times of the order of years.

关键词： laser cooling polarization-gradient cooling orbital microgravity space lab

出口退税如何影响异质性产品的出口——来自企业、产品和目的国三维数据的证据

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国际贸易问题 2016年第6期 105-115页

作者：袁劲刘啟仁厦门大学经济学院

本文将出口退税引入产品异质性理论分析出口退税对异质性产品出口的影响,并采用2002-2006年企业、产品和目的国三个维度的出口数据,从中国出口增长的集约边际和扩展边际两个角度检验该影响机制。实证检验发现,面对出口产品退税率的提高... 详细信息

本文将出口退税引入产品异质性理论分析出口退税对异质性产品出口的影响,并采用2002-2006年企业、产品和目的国三个维度的出口数据,从中国出口增长的集约边际和扩展边际两个角度检验该影响机制。实证检验发现,面对出口产品退税率的提高,企业通过降低出口价格达到出口数量的增长;同时,出口退税率的提高增加了企业出口某产品的目的国数量。进一步研究发现,出口退税对企业核心产品的价格和出口国数目有显著影响,而对边缘产品影响不显著。核心产品的需求相对缺乏弹性,因此出口退税对核心产品的数量影响较小。基于不同生产率、样本和退税率度量方法,以上结论均较为稳健。

关键词：出口退税集约边际扩展边际产品异质性