检索结果-南通市图书馆

Occurrence of the Bunsen side reaction in the sulfur-iodine thermochemical cycle for hydrogen production

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2013年第4期14卷 300-306页

作者： qiao-qiao zhu Yan-wei ZHANG Zhi YING Jun-hu ZHOU Zhi-hua WANG Ke-fa CEN State Key Laboratory of Clean Energy Utilization Department of Energy EngineeringZhejiang University

This study aimed to establish a closed-cycle operation technology with high thermal efficiency in the thermochemical sulfur-iodine cycle for large-scale hydrogen production.A series of experimental studies were performed to investigate the occurrence of side reactions in both the H2SO4 and HI x phases from the H2SO4/HI/I2/H2O quaternary system within a constant temperature range of 323-363 *** effects of iodine content,water content and reaction temperature on the side reactions were *** results showed that an increase in the reaction temperature promoted the side ***,they were prevented as the iodine or water content *** occurrence of side reactions was faster in kinetics and more intense in the H2SO4 phase than in the HI x *** sulfur or hydrogen sulfide formation reaction or the reverse Bunsen reaction was validated under certain conditions.

关键词： Thermochemical sulfur-iodine cycle Hydrogen production Side reaction Sulfur Hydrogen sulfide

NFXL1 functions as a transcriptional activator required for thermotolerance at reproductive stage in Arabidopsis

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2024年第1期66卷 54-65页

作者： qiao‐Yun zhu Lin‐Lin Zhang Jian‐Xiang Liu State Key Laboratory of Plant Environmental Resilience College of Life SciencesZhejiang UniversityHangzhou 310027China

Plants are highly susceptible to abiotic stresses,particularly heat stress during the reproductive ***,the specific molecular mechanisms underlying this sensitivity remain largely *** the current study,we demonstrate that the Nuclear Transcription Factor,X-box Binding Protein 1-Like 1(NFXL1),directly regulates the expression of DEHYDRATION-RESPONSIVE ELEMENT-BINDING PROTEIN 2A(DREB2A),which is crucial for reproductive thermotolerance in ***1 is upregulated by heat stress,and its mutation leads to a reduction in silique length(seed number)under heat stress ***-Seq analysis reveals that NFXL1 has a global impact on the expression of heat stress responsive genes,including DREB2A,Heat Shock Factor A3(HSFA3)and Heat Shock Protein 17.6(HSP17.6)in flower ***,NFXL1 is enriched in the promoter region of DREB2A,but not of either HSFA3 or *** experiments using electrophoretic mobility shift assay have confirmed that NFXL1 directly binds to the DNA fragment derived from the DREB2A ***,effector-reporter assays have shown that NFXL1 activates the DREB2A *** DREB2A mutants are also heat stress sensitive at the reproductive stage,and DEREB2A is epistatic to NFXL1 in regulating thermotolerance in flower *** is known that HSFA3,a direct target of DREB2A,regulates the expression of heat shock proteins genes under heat stress ***,our findings establish NFXL1 as a critical upstream regulator of DREB2A in the transcriptional cassette responsible for heat stress responses required for reproductive thermotolerance in Arabidopsis.

关键词： Arabidopsis DREB2A heat stress NFXL1 reproductive thermotolerance

Assessment of early-age cracking of high-performance concrete in restrained ring specimens

在线全文

学校读者我要写书评

暂无评论

Water Science and Engineering 2010年第1期3卷 113-120页

作者： Quang-phu NGUYEN Lin-hua JIANG qiao zhu College of Mechanics and Materials Hohai University Nanjing 210098 P R. China Faculty of Civil Engineering Water Resources University Hanoi Vietnam

High-performance concrete （HPC） is stronger and more durable than conventional concrete. However, shrinkage and shrinkage cracking are common phenomena in HPC, especially early-age cracking. This study assessed early-age cracking of HPC for two mixtures using restrained ring tests. The two mixtures were produced with water/binder mass ratio （mw/mB） of 0.22 and 0.40, respectively. The results show that, with greater steel thickness, the higher degree of restraint resulted in a higher interface pressure and earlier cracking. With steel thickness of 6 mm, 19 mm, and 30 mm, the age of cracking were, respectively, 12 days, 8 days, and 5.4 days with the mw/mB = 0.22 mixture; and 22.5 days, 12.6 days, and 7.1 days with the mw/mB= 0.40 mixture. Cases of the same steel thickness show that the ring specimens with a thicker concrete wall crack later. With the mw/mB = 0.22 mixture, concrete walls with thicknesses of 37.5 mm, 75 mm, and 112.5 mm cracked at 3.4 days, 8.0 days, and 9.8 days, respectively; with the mw/mB = 0.40 mixture, the ages of cracking were 7.1 days, 12.6 days, and 16.0 days, respectively.

关键词： high-performance concrete shrinkage early-age cracking restrained ring test

在线全文

学校读者我要写书评

暂无评论

花岗岩废石料替代混凝土组分优先性试验

北华大学学报（自然科学版） 2025年第1期26卷 125-132页

作者：付卫佳蒙彦宇冷冰朱乔北华大学林学院吉林吉林132013 北华大学土木与交通学院吉林吉林132013 白城职业技术学院吉林白城137701

花岗岩废石料替代混凝土组分可以降低工程成本,减少天然资源消耗;确定替代的优先级,可更大程度实现对花岗岩废石料的再利用。为探究废石料等质量替代混凝土原材料的优先级,利用废石料分别替代水泥、粗细集料制备C25、C30、C40等3种强度... 详细信息

花岗岩废石料替代混凝土组分可以降低工程成本,减少天然资源消耗;确定替代的优先级,可更大程度实现对花岗岩废石料的再利用。为探究废石料等质量替代混凝土原材料的优先级,利用废石料分别替代水泥、粗细集料制备C25、C30、C40等3种强度混凝土,采用扫描电镜与压汞试验结合抗压强度试验结果分析废石料替代混凝土原材料后对混凝土强度、密实性的影响,确定替代的优先顺序。结果表明:C25、C30、C40等3种强度花岗岩废石料混凝土外观形貌优于同强度基准组,颗粒级配更为合理;3种混凝土中的无害孔、少害孔、有害孔和多害孔体积分布总体优于基准组,孔隙率分别为13.51%、11.52%、9.14%,与基准组相比都有显著降低。废石料的加入有效细化了裂缝与孔隙,提高了混凝土的强度和密实性,由此确定了替代混凝土组分的优先级,可为花岗岩废石料混凝土最优配合比设计提供参考。

关键词：花岗岩废石料混凝土优先级微观形貌孔隙率

Recurrence after spontaneous separation of epiretinal membrane in a young woman:a case report

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2023年第3期16卷 476-478页

作者： qiao-zhu Zeng Wen-Zhen Yu Department of Ophthalmology Eye Diseases and Optometry InstitutePeking University People’s HospitalBeijing100044China Beijing Key Laboratory of Diagnosis and Therapy of Retinal and Choroid Diseases College of OptometryPeking University Health Science CenterBeijing 100044China

Dear Editor,We report a case of recurrence after spontaneous separation of epiretinal membrane (ERM) in a young woman with suspected retinal *** is defined as the fibrocellular membrane that proliferates on the inner surface of neurosensory retina at the macular *** ERM(iERM) usually occurs without a clearly identifiable cause in patients of more than 50 years of age and a great discrepancy in its prevalence from 1.02%to 28.9%among different ethnic groups were noted in previous epidemiologic studies^([1-3]).

关键词： separation epi young

Liver transplantation benefits selected patients with hilar cholangiocarcinoma and colorectal liver metastases

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2018年第5期17卷 385-386页

作者： Ji-qiao zhu Qiang He Xian-Liang Li Department of Hepatobiliary and Pancreatic Surgery Beijing Chaoyang Hospital Capital Medical University

Hilarcholangiocarcinoma(HCCA)isanaggressivemalignancy with a dismal prognosis. The 5-year survival rate has been reported to range from 39%to 50%if an R0 resection is obtained [1]. Approximately 25%patients with early stage HCCA of all cases can be treated with radical surgical resection [2], while most patients do not have a chance to receive a surgical procedure due to the advanced stage at the time of diagnosis. The poor prognosis is gen-

关键词： Liver transplantation benefits selected patients with hilar cholangiocarcinoma and colorectal liver metastases

Influence of silane coupling agent on the conversion film forming of galvanized steel treated with cerium salt

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2012年第9期19卷 800-804页

作者： Li-hua Gong Rui-rui Tang Yu-qiao zhu Dong-liang Chen School of Material Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

The influence of silane coupling agent on the film forming of galvanized steel treated with cerium salt was studied by scanning electron microscopy （SEM） and X-ray photoelectron spectroscopy （XPS）, and the corrosion resistance of conversion films was analyzed by electro interstitial scanning （EIS）. The results show that silane coupling agent KH-570 has significant influence on the compactness and homogeneity of cerium conversion films, and the process of film forming is promoted by increasing the content of tervalent and tetravalent cerium oxide. The impedance value of the cerium conversion film, especially modified with KH-570, is greater than that of the base metal, which reveals that it is necessary to add silane coupling agent to the film-forming solution in order to improve the corrosion resistance of the conversion film.

关键词： galvanized metal cerium compounds thin films silanes coupling agents

Burden Distribution Calculation of Bell-Less Top of Blast Furnace Based on Multi-Radar Data

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2013年第6期20卷 33-37页

作者： zhu qiao L Cheng-long YIN Yi-xin CHEN Xian-zhong School of Automation and Electrical Engineering University of Science and Technology Beijing Key Laboratory of Advanced Control of Iron and Steel Process

The burden distribution real-time estimation problem of multi-loop charging based on the real multi-radar data is *** , an iterative algorithm is introduced to calculate the radial coordinate of the *** , based on the multi-radar data , the burden profile is estimated by a cubic-curve equation at the end of the multi-loop *** , the burden profile before the next multi-loop charging is calculated based on multi-radar data by considering the impact of burden *** the basis of these burden profiles , a more accurate thickness ratio of ore to coke （ RO/C ） at the radial direction of blast furnace can be *** , an example is given to calculate the burden profiles and RO/C by using the real multi-radar data sampled from Baosteel , which shows the effectiveness of the method introduced.

关键词： blast furnace multi-radar data burden distribution multi-loop charging RO/C

Chemical characterization and source apportionment of atmospheric submicron particles on the western coast of Taiwan Strait, China

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2017年第2期29卷 293-304页

作者： Liming Cao qiao zhu Xiaofeng Huang Junjun Deng Jinsheng Chen Youwei Hong Lingling Xu Lingyan He Key Laboratory for Urban Habitat Environmental Science and Technology School of Environment and Energy Peking University Shenzhen Graduate School Center for Excellence in Urban Atmospheric Environment Institute of Urban Environment Chinese Academy of Sciences

Taiwan Strait is a special channel for subtropical East Asian Monsoon and its western coast is an important economic zone in China. In this study, a suburban site in the city of Xiamen on the western coast of Taiwan Strait was selected for fine aerosol study to improve the understanding of air pollution sources in this region. An Aerodyne high-resolution time-of-flight aerosol mass spectrometer（HR-To F-AMS） and an Aethalometer were deployed to measure fine aerosol composition with a time resolution of 5 min from May 1to 18, 2015. The average mass concentration of PM1 was 46.2 ± 26.3 μg/m^3 for the entire campaign. Organics（28.3%）, sulfate（24.9%）, and nitrate（20.6%） were the major components in the fine particles, followed by ammonium, black carbon（BC）, and chloride. Evolution of nitrate concentration and size distribution indicated that local NOx emissions played a key role in high fine particle pollution in Xiamen. In addition, organic nitrate was found to account for 9.0%–13.8% of the total measured nitrate. Positive Matrix Factorization（PMF）conducted with high-resolution organic mass spectra dataset differentiated the organic aerosol into three components, including a hydrocarbon-like organic aerosol（HOA） and two oxygenated organic aerosols（SV-OOA and LV-OOA）, which on average accounted for 27.6%,28.8%, and 43.6% of the total organic mass, respectively. The relationship between the mass concentration of submicron particle species and wind further confirmed that all major fine particle species were influenced by both strong local emissions in the southeastern area of Xiamen and regional transport through the Taiwan Strait.

关键词： Submicron particle Chemical characterization Organic aerosol Source apportionment