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加氢轻柴油作乙烯原料应用评价研究

化工科技 2022年第3期30卷 26-29页

作者：潘宇高大坤孙宝园赵胜博刘学龙韩小平中国石油吉林石化公司研究院吉林吉林132021 中国石油吉林石化公司炼油厂吉林吉林132022 吉林市毓文中学吉林132012

采用烃重组化工轻油为裂解原料,在停留时间为0.205 s、出口压力为0.085 MPa,在实验室模拟评价装置上考察温度、稀释通过对轻柴油进行加氢处理,考察原料在加氢前后族组成上和裂解性能发生的变化,对加氢前后轻柴油在蒸汽裂解模拟评价装置... 详细信息

采用烃重组化工轻油为裂解原料,在停留时间为0.205 s、出口压力为0.085 MPa,在实验室模拟评价装置上考察温度、稀释通过对轻柴油进行加氢处理,考察原料在加氢前后族组成上和裂解性能发生的变化,对加氢前后轻柴油在蒸汽裂解模拟评价装置上,进行最佳裂解条件探索和经济性评价研究。结果表明,通过对轻柴油进行加氢改质后,裂解性能有所提高,探索了加氢轻柴油最佳裂解条件,在此裂解条件下产品中双烯(乙烯、丙烯)和三烯(乙烯、丙烯、1,3-丁二烯)收率分别提高2.6个百分点和2.92个百分点。将加氢轻柴油作为乙烯裂解原料,拓宽原料来源,能有效缓解原料短缺现象。

关键词：乙烯丙烯加氢轻柴油裂解

Analysis and Improvement on an Authentication Scheme for Wireless Sensor Networks in Internet of Things Environment

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Wuhan University Journal of Natural Sciences 2023年第6期28卷 541-552页

作者： LI Anqian KANG baoyuan ZUO Xinyu HUO Yuyan NIU Shufang sun Zhu School of Software Tiangong UniversityTianjin 300387China School of Computer Science and Technology Tiangong UniversityTianjin 300387China International Cultural Exchange College Xinjiang UniversityUrumqi 830046XinjiangChina

Nowadays, Internet of Everything has become a major trend, and Internet of Things(IoT) has emerged. Wireless sensor networks(WSNs) are core technologies for IoT to sense the real world. Due to the unattended and resource-constrained characteristics of WSNs, it is a great challenge to design an efficient and secure authentication scheme for communication between users and sensor nodes in WSNs. Recently, Hu et al proposed an authentication scheme for WSNs in an IoT environment. They claimed that their scheme could maximize the balance between security and computational cost as well as efficiency, and be resistant to many known attacks. However, we find that the scheme is difficult to resist stolen smart card attack and denial-of-service attack. Moreover, during the login and key negotiation phase of the scheme, Gateway(GWN) is unable to extract key values for subsequent computation based on the messages sent by the sensor nodes, which in turn leads to the inability to achieve mutual authentication and key agreement. To overcome these shortcomings, we propose an improved scheme. The proposed scheme enables real-time data exchange and transmission as well as secure communication between users and sensor nodes.

关键词： Internet of Things(IoT) Wireless Sensor Networks(WSNs) authentication elliptical curve cryptography(ECC)

Integrated agronomic practice increases maize grain yield and nitrogen use efficiency under various soil fertility conditions

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The Crop Journal 2019年第4期7卷 527-538页

作者： baoyuan Zhou Xuefang sun Dan Wang Zaisong Ding Congfeng Li Wei Ma Ming Zhao Institute of Crop Sciences Chinese Academy of Agricultural Sciences Key Laboratory of Crop Physiology & Ecology Ministry of Agriculture Beijing 100081 China College of Plant Science and Technology Huazhong Agricultural University Key Laboratory of Crop Physiology Ecology and Cultivation (Middle Reaches of the Yangtze River) of Ministry of Agriculture Wuhan 430070 Hubei China

Crop yield potential can be increased through the use of appropriate agronomic practices. Integrated agronomic practice (IAP) is an effective way to increase maize (Zea mays L.) grain yield and nitrogen use efficiency (NUE);however, the physiological processes associated with gains in yield potential obtained from IAP, particularly the different under various soil fertility conditions, remain poorly understood. An IAP strategy including optimal planting density, split fertilizer application, and subsoiling tillage was evaluated over two growing seasons to determine whether the effects of IAP on maize yield and NUE differ under different levels of soil fertility. Compared to farmers' practices (FP), IAP increased maize grain yield in 2013 and 2014 by 25% and 28%, respectively, in low soil fertility (LSF) fields and by 36% and 37%, respectively, in high soil fertility (HSF) fields. The large yield gap was attributed mainly to greater dry matter (DM) and N accumulation with IAP than with FP owing to increased leaf area index (LAI) and DM accumulation rate, which were promoted by greater soil mineral N content (Nmin) and root length. Post-silking DM and N accumulation were also greater with IAP than with FP under HSF conditions, accounting for 60% and 43%, respectively, of total biomass and N accumulation;however, no significant differences were found for post-silking DM and N accumulation between IAP and FP under LSF conditions. Thus, the increase in grain yield with IAP was greater under HSF than under LSF. Because of greater grain yield and N uptake, IAP significantly increased N partial factor productivity, agronomic N efficiency, N recovery efficiency, and physiological efficiency of applied N compared to FP, particularly in the HSF fields. These results indicate that considerable further increases in yield and NUE can be obtained by increasing effective soil N content and maize root length to promote post-silking N and DM accumulation in maize planted at high plan

关键词： Summer maize Integrated agronomic practice Soil fertility Grain yield Nitrogen use efficiency

A nanobody-based blocking enzyme-linked immunosorbent assay for detecting antibodies against pseudorabies virus glycoprotein E

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Journal of Integrative Agriculture 2024年第4期23卷 1354-1368页

作者： Huanhuan Lü Pinpin Ji Siyu Liu Ziwei Zhang Lei Wang Yani sun baoyuan Liu Lizhen Wang Qin Zhao Department of Preventive Veterinary Medicine College of Veterinary MedicineNorthwest A&F University/Shaanxi Scientific Observing and Experimental Station of Veterinary Pharmacology and Diagnostic TechnologyMinistry of Agriculture and Rural AffairsYangling 712100China

Pseudorabies(PR)is an acute infectious disease of pigs caused by the PR virus(PRV)and results in great economic losses to the pig industry *** glycoprotein E(gE)-based enzyme-linked immunosorbent assay(ELISA)has been used to distinguish gE-deleted vaccine-immunized pigs from wild-type virus-infected pigs to eradicate PR in some *** has the advantages of small size and easy genetic engineering and has been a promising diagnostic ***,there were few reports about developing nanobody-based ELISA for detecting anti-PRV-gE *** the present study,the recombinant PRV-gE was expressed with a bacterial system and used to immunize the Bactrian ***,two nanobodies against PRV-gE were screened from the immunized camel by phage display ***,two nanobody-HRP fusion proteins were expressed with HEK293T *** PRV-gE-Nb36-HRP fusion protein was selected as the probe for developing the blocking ELISA(bELISA)to detect anti-PRV-gE *** optimizing the conditions of bELISA,the amount of coated antigen was 200 ng per well,and dilutions of the fusion protein and tested pig sera were separately 1:320 and 1:*** cut-off value of bELISA was 24.20%,and the sensitivity and specificity were 96.43 and 92.63%,*** detecting 233 clinical pig sera with the developed bELISA and a commercial kit,the results showed that the coincidence rate of two assays was 93.99%.Additionallly,epitope mapping showed that PRV-gE-Nb36 recognized a conserved conformational epitope in different reference PRV ***,great stability and low-cost nanobody-based bELISA for detecting anti-PRV-gE antibodies were *** bELISA could be used for monitoring and eradicating PR.

关键词： nanobody nanobody-HRP blocking ELISA PRV-gE antibody

Three photosynthetic patterns characterized by cluster analysis of gas exchange data in two rice populations

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The Crop Journal 2014年第1期2卷 22-27页

作者： Zaisong Ding Tao Li Xianguo Zhu Xuefang sun Suhua Huang baoyuan Zhou Ming Zhao Institute of Crop Science Chinese Academy of Agricultural SciencesKey Laboratory of Crop Physiology and ProductionMinistry of Agriculture

Plant photosynthetic rate is affected by stomatal status and internal CO2 carboxylation. Understanding which process determines photosynthetic rate is essential for developing strategies for breeding crops with high photosynthetic efficiency. In this study, we identified different physiological patterns of photosynthetic rate in two different rice populations. Photosynthetic gas exchange parameters were measured during the flowering stage in two rice populations. Clustering and correlation analyses were performed on the resulting data. Five or six groups were defined by K-means clustering according to differences in net photosynthetic rates(Pn). According to differences in stomatal conductance(gs) and carboxylation efficiency(CE), each group was clustered into three subgroups characterized by physiological patterns stomatal pattern, carboxylation pattern, and intermediate pattern. Pn was significantly correlated with gs(r = 0.810) and CE(r = 0.531). Pn was also significantly correlated with gs and CE in the three physiological patterns. The correlation coefficients were highest in the stomatal pattern(0.905 and 0.957) and lowest in the carboxylation pattern(0.825 and 0.859). Higher correlation coefficients between Pn and gs or CE in the three physiological patterns indicate that clustering is very important for understanding factors limiting rice photosynthesis. ? 2013 Production and hosting by Elsevier B.V. on behalf of Crop Science Society of

关键词： Cluster analysis Net photosynthesis rate Stomatal pattern Carboxylation pattern Rice

Passively mode-locked Er-doped fiber laser based on SnS2 nanosheets as a saturable absorber

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Photonics Research 2018年第2期6卷 72-76页

作者： KANGDI NIU RuYI sun QINGYUN CHEN baoyuan MAN AND HUANIAN ZHANG Shandong Provincial Key Laboratory of Optics and Photonic Devices School of Physics and Electronics Shandong Normal University Jinan 250014 China Institute of Data Science and Technology Shandong Normal University Jinan 250014 China

In this paper, tin disulfide （SnS2）, a two-dimensional （2D） n-type direct bandgap layered metal dichalcogenide with a gap value of 2.24 eV, was employed as a saturable absorber. Its appearance and nonlinear saturable ab- sorption characteristics were also investigated experimentally. SnSz-PVA （polyvinyl alcohol） film was successfully prepared and employed as a mode-locker for achieving a mode-locked Er-doped fiber laser with a pulse width of 623 fs at a pulse repetition rate of 29.33 MHz. The results prove that SnS2 nanosheets will have wide potential ultrafast photonic applications due to their suitable bandgap value and excellent nonlinear saturable absorption characteristics.

关键词： (160.6000) Semiconductor materials (140.4050) Mode-locked lasers (140.3500) Lasers, erbium.

Application of Human Adenovirus Genotyping by Phylogenetic Analysis in an Outbreak to Identify Nosocomial Infection

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Virologica Sinica 2021年第3期36卷 393-401页

作者： Chuanyu Yang Chunmei Zhu Yuan Qian Jie Deng baoyuan Zhang Runan Zhu Fang Wang Yu sun Dongmei Chen Qi Guo Yutong Zhou Lei Yu Ling Cao Linqing Zhao Laboratory of Virology Beijing Key Laboratory of Etiology of Viral Diseases in ChildrenCapital Institute of PediatricsBeijing 100020China Department of Respiratory Medicine Affiliated Children's HospitalCapital Institute of PediatricsBeijing 100020China Hospital Infection-Control Department Affiliated Children’s HospitalCapital Institute of PediatricsBeijing 100020China

Nosocomial infections are common in pediatric patients and can be fatal in infants and immunocompromised patients. In September 2018, a high positive rate of human adenovirus HAdV was occurred among hospitalized children in the Children's Hospital Affiliated to the Capital Institute of Paediatrics in Beijing. To investigate whether this outbreak of HAdV was related to nosocomial infections or the result of community infections, we collected respiratory specimens from patients with acute respiratory infections in a respiratory ward during June to December 2018, and screened for respiratory viruses. Among 1,840 cases included, 95(5.2%, 95/1840) were positive for HAdV and 81 were genotyped based on phylogenetic analysis, including seven as HAdV-1(8.6%), 30 HAdV-3(37.0%), two HAdV-6(2.5%), and 42 HAdV-7(51.9%). More HAdV-positive samples were collected in August(4.7%, 12/255), September(15.0%, 41/274) and October(6.9%, 17/247), with a peak in September 2018. By combining the results of HAdV phylogenetic analysis with clinical data of patients, there were 77 cases(4.2%, 77/1840;81.1%, 77/95) excluded from nosocomial infections, eight cases representing possible infections transmitted by visitors or attending parents, three cases without sequences that might have been due to infection transmitted by roommates positive for HAdV, one case of a roommate without an HAdV sequence, and six cases that shared highly homologous sequences with those of their roommates, for which nosocomial infections might be considered. In conclusion, genotyping of HAdVs based on phylogenetic analysis combined with clinical information provides a powerful method to distinguish nosocomial infections from community acquired infection, especially when tracing the origins of nosocomial infections.

关键词： Acute respiratory tract infection Human adenovirus(HAdV) Phylogenetic analysis Nosocomial infection

Two nanobody‑based immunoassays to differentiate antibodies against genotype 1 and 2 porcine reproductive and respiratory syndrome virus

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Animal Diseases 2024年第2期4卷 98-114页

作者： Xu Chen Yueting Chang Lu Zhang Xinyu Zhao Zhihan Li Zhijie Zhang Pinpin Ji Qingyuan Liu Jiakai Zhao Jiahong Zhu baoyuan Liu Xinjie Wang Yani sun Qin Zhao Department of Preventive Veterinary Medicine College of Veterinary MedicineNorthwest A&F UniversityYanglingShaanxi 712100China Shenzhen Branch Guangdong Laboratory of Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518100China

Porcine reproductive and respiratory syndrome virus(PRRSV)infection causes significant economic loss to the global pig *** 1 and 2 PRRSV(PRRSV-1 and-2)infections have been reported in China,Europe and *** accurate prevention,nanobodies were first used as diagnostic reagents for PRRSV *** this study three nanobodies targeting both PRRSV-1 and-2,two targeting PRRSV-1 and three targeting PRRSV-2,were screened and *** develop two competitive ELISAs(cELISAs),the g1-2-PRRSV-Nb3-HRP nanobody was chosen for the g1-2-cELISA,to detect common antibodies against PRRSV-1 and-2,and the g1-PRRSV-Nb136-HRP nanobody was chosen for the g1-cELISA,to detect anti-PRRSV-1 *** two cELISAs were developed using PRRSV-1-N protein as coating antigen,and the amounts for both were 100 ng/*** optimized dilution of testing pig sera was 1:20,the optimized reaction times were 30 min,and the colorimetric reaction times were 15 ***,the cut-off values of the g1-2-cELISA and g1-cELISA were 26.6%and 35.6%,*** of them have high sensitivity,strong specificity,good repeatability,and *** addition,for the 1534 clinical pig sera,an agreement rate of 99.02%(Kappa values=0.97)was determined between the g1-2-cELISA and the commercial IDEXX ELISA *** the g1-cELSIA,it can specifically detect anti-PRRSV-1 antibodies in the clinical pig ***,combining two nanobody-based cELISAs can differentially detect antibodies against PRRSV-1 and-2.

关键词： PRRSV Competitive ELISA Nanobody Antigen epitope

Detection of Three Common Organic Explosives Using Capillary Electrophoresis

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Journal of Materials Science and Chemical Engineering 2016年第6期4卷 17-25页

作者： Hong Zhou Zhanfang Liu Yuyou sun Ling Zeng Hongcheng Mei Jianzhong Xu baoyuan Guo Hongxia Hao Collaborative Innovation Center of Judicial Civilization Beijing China Key Laboratory of Evidence Science China University of Political Science and Law Ministry of Education Beijing China Institute of Forensic Science Ministry of Public Security Beijing China Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing China

In this article, a detection method for organic explosives by capillary electrophoresis (CE) is developed based on previous detection techniques. Firstly, a buffer solution consisting of 50 mmol·L-1 sodium dodecyl sulfate (SDS), 20 mmol·L-1 sodium tetraborate and 5% methanol was prepared and the UV detection in this buffer solution was conducted for three common organic explosives, including TNT, DNT and PETN. Then, the capillary UV detection method was investigated in terms of the transition time repeatability, the linear relationship between mass concentration and peak area and the limit of detection. The results revealed good reliability and stability of this method. In addition, these samples were characterized by photodiode array detector (PDA) to verify the qualitative results of UV detection.

关键词： Organic Explosives Capillary Electrophoresis (CE) UV Detection