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Pd/silicalite-1: An highly active catalyst for the oxidative removal of toluene

Journal of Environmental Sciences 2022年第6期34卷 209-219页

作者： Linke Wu Jiguang Deng Yuxi Liu Lin Jing Xiaohui Yu Xing Zhang ruyi gao Wenbo Pei Xiuqing Hao Ali Rastegarpanah Hongxing Dai Beijing Key Laboratory for Green Catalysis and Separation Key Laboratory of Beijing on Regional Air Pollution ControlKey Laboratory of Advanced Functional MaterialsEducation Ministry of ChinaLaboratory of Catalysis Chemistry and NanoscienceDepartment of Environmental Chemical EngineeringSchool of Environmental and Chemical EngineeringFaculty of Environment and LifeBeijing University of TechnologyBeijing 100124China

Catalytic combustion is thought as an efficient and economic pathway to remove volatile organic compounds, and its critical issue is the development of high-performance catalytic materials. In this work, we used the in situ synthesis method to prepare the silicalite-1(S-1)-supported Pd nanoparticles(NPs). It is found that the as-prepared catalysts displayed a hexagonal prism morphology and a surface area of 390-440 m^(2)/g. The sample(0.28Pd/S-1-H)derived after reduction at 500°C in 10 vol% H_(2)showed the best catalytic activity for toluene combustion(T50%= 180℃ and T90%= 189℃ at a space velocity of 40,000 m L/(g·hr), turnover frequency(TOFPd) at 160℃ = 3.46 × 10^(-3)sec^(-1), and specific reaction rate at 160℃ = 63.8μmol/(gPd·sec)), with the apparent activation energy(41 k J/mol) obtained over the bestperforming 0.28Pd/S-1-H sample being much lower than those(51-70 k J/mol) obtained over the other samples(0.28Pd/S-1-A derived from calcination at 500℃ in air, 0.26Pd/S-1-im derived from the impregnation route, and 0.27Pd/ZSM-5-H prepared after reduction at 500℃ in 10 vol% H_(2)). Furthermore, the 0.28Pd/S-1-H sample possessed good thermal stability and its partial deactivation due to CO_(2) or H_(2)O introduction was reversible, but SO_(2) addition resulted in an irreversible deactivation. The possible pathways of toluene oxidation over 0.28Pd/S-1-H was toluene → p-methylbenzoquinone → maleic anhydride, benzoic acid, benzaldehyde → carbon dioxide and water. We conclude that the good dispersion of Pd NPs, high adsorption oxygen species concentration, large toluene adsorption capacity, strong acidity,and more Pd~0 species were responsible for the good catalytic performance of 0.28Pd/S-1-H.

关键词： Silicalite-1 Hexagonal prism shape Supported palladium catalyst Volatile organic compound Toluene combustion

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Enhanced pathogenicity and transmissibility of H9N2 avian influenza virus in mammals by hemagglutinin mutations combined with PB2-627K

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Virologica Sinica 2023年第1期38卷 47-55页

作者： Kaituo Liu Yaqian Guo Huafen Zheng Zhuxing Ji Miao Cai ruyi gao Pinghu Zhang Xiaowen Liu Xiulong Xu Xiaoquan Wang Xiufan Liu Joint International Research Laboratory of Agriculture and Agri-Product Safety The Ministry of Education of ChinaYangzhou UniversityYangzhou225009China Animal Infectious Disease Laboratory College of Veterinary MedicineYangzhou UniversityYangzhou225009China Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis Yangzhou UniversityYangzhou225009China Jiangsu Key Laboratory of Zoonosis Yangzhou225009China Institute of Translational Medicine Key Laboratory of Geriatric Disease Prevention and Control of Jiangsu ProvinceMedical CollegeYangzhou UniversityYangzhou225009China

H9N2 avian influenza viruses(AIVs)circulate globally in poultry and have become the dominant AIV subtype in China in recent ***,we demonstrated that the H9N2 virus(A/chicken/Eastern China/SDKD1/2015)naturally harbors a mammalian-adaptive molecular factor(627K)in the PB2 protein and is weakly pathogenic in ***,we focused on new markers for virulence in mammals.A mouse-adapted H9N2 virus was serially passaged in mice by infecting their *** expected,infected mice showed clinical symptoms and died at passage six.A comparison between the wild-type and mouse-adapted virus sequences identified amino acid substitutions in the hemagglutinin(HA)protein.H9N2 viruses with the T187P t M227L double mutation exhibited an increased affinity to human-type(SAα2,6Gal)receptors and significantly enhanced viral attachment to mouse lung tissues,which contributed to enhancing viral replication and virulence in ***,HA with the T187P t M227L mutation enabled H9N2 viral transmission in guinea pigs via direct *** pathogenicity in mice is a polygenic *** results demonstrated that these HA mutations might be combined with PB2-627K to significantly increase H9N2 virulence in mice,and this enhanced virulence was achieved in other H9N2 AIVs by generating the same combination of *** summary,our study identified novel key elements in the HA protein that are required for H9N2 pathogenicity in mice and provided valuable insights into pandemic preparedness against emerging H_(9)N_(2)strains.

关键词： H9N2 Hemagglutinin(HA) PB2-627K Mammalian adaptation Pathogenicity Transmissibility

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Phosphorylation of PB2 at serine 181 restricts viral replication and virulence of the highly pathogenic H5N1 avian influenza virus in mice

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Virologica Sinica 2024年第1期39卷 97-112页

作者： Jiao Hu Zixiong Zeng Xia Chen Manyu Zhang Zenglei Hu Min Gu Xiaoquan Wang ruyi gao Shunlin Hu Yu Chen Xiaowen Liu Daxin Peng Xiufan Liu Animal Infectious Disease Laboratory School of Veterinary MedicineYangzhou UniversityYangzhou225009China Joint International Research Laboratory of Agriculture and Agri-Product Safety The Ministry of Education of ChinaYangzhou University225009China Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis Yangzhou UniversityYangzhou225009China Key Laboratory of Prevention and Control of Biological Hazard Factors(Animal Origin)for Agri-food Safety and Quality Ministry of Agriculture of China(26116120)Yangzhou UniversityYangzhou225009China

Influenza A virus(IAV)continues to pose a pandemic threat to public health,resulting a high mortality rate annually and during pandemic *** modification of viral protein plays a substantial role in regulating IAV ***,based on immunoprecipitation(IP)-based mass spectrometry(MS)and purified virus-coupled MS,a total of 89 phosphorylation sites distributed among 10 encoded viral proteins of IAV were identified,including 60 novel phosphorylation ***,for the first time,we provide evidence that PB2 can also be acetylated at site ***,the PB2 S181 phosphorylation site was consistently identified in both IP-based MS and purified virus-based *** S181 and K187 are exposed on the surface of the PB2 protein and are highly conserved in various IAV strains,suggesting their fundamental importance in the IAV life *** analysis results demonstrated that S181E/A and K187Q/R mimic mutations do not significantly alter the PB2 protein *** continuous phosphorylation mimicked by the PB2 S181E mutation substantially decreases viral fitness in mice,PB2 K187Q mimetic acetylation slightly enhances viral virulence in ***,PB2 S181E substantially impairs viral polymerase activity and viral replication,remarkably dampens protein stability and nuclear accumulation of PB2,and significantly weakens IAV-induced inflammatory ***,our study further enriches the database of phosphorylation and acetylation sites of influenza viral proteins,laying a foundation for subsequent mechanistic ***,the unraveled antiviral effect of PB2 S181E mimetic phosphorylation may provide a new target for the subsequent study of antiviral drugs.

关键词： H5N1 influenza virus PB2 Phosphorylation Acetylation Viral fitness Mice

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Emergence of a novel reassortant avian influenza virus(H10N3) in Eastern China with high pathogenicity and respiratory droplet transmissibility to mammals

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Science China(Life Sciences) 2022年第5期65卷 1024-1035页

作者： Kaituo Liu Pingyun Ding Yuru Pei ruyi gao Wenwen Han Huafen Zheng Zhuxing Ji Miao Cai Jinyuan Gu Xiuli Li Min Gu Jiao Hu Xiaowen Liu Shunlin Hu Pinghu Zhang Xiaobo Wang Xiaoquan Wang Xiufan Liu College of Veterinary Medicine Yangzhou UniversityYangzhou 225009China Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis Yangzhou UniversityYangzhou 225009China Jiangsu Key Laboratory of Zoonosis Yangzhou 225009China Institute of Translational Medicine Key Laboratory of Geriatric Disease Prevention and Control of Jiangsu ProvinceMedical CollegeYangzhou UniversityYangzhou 225009China

Decades have passed since the first discovery of H10-subtype avian influenza virus(AIV) in chickens in 1949,and it has been detected in many species including mammals such as minks,pigs,seals and *** of human infections with H10N8viruses identified in China in 2013 have raised widespread *** novel reassortant H10N3 viruses were isolated from chickens in December 2019 in eastern China during routine surveillance for *** internal genes of these viruses were derived from genotype S(G57) H9N2 and were consistent with H5N6,H7N9 and H10N8,which cause fatal infections in *** viral pathogenicity and transmissibility were further studied in different animal *** two H10N3 isolates had low pathogenicity in chickens and were transmitted between chickens via direct *** viruses were highly pathogenic in mice and could be transmitted between guinea pigs via direct contact and respiratory *** importantly,these viruses can bind to both human-type SAα-2,6-Gal receptors and avian-type SAα-2,3-Gal *** shedding in chickens and good adaptability to mammals of these H10N3 isolates would make it easier to transmit to humans and pose a threat to public health.

关键词： H10N3 H9N2 receptor binding pathogenicity respiratory droplet transmissibility

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Short-term Photovoltaic Power Prediction Based on Feature Optimization and Hybrid Improved Grey Wolf Algorithm-optimized BiLSTM Network

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Dianwang Jishu/Power System Technology 2025年第1期49卷 209-222页

作者： Zhao, ruyi Wang, Xiaohui Zheng, Bihuang Li, Daoxing gao, Yi Guo, Pengtian China Electric Power Research Institute Haidian District Beijing 100192 China Economic and Technological Research Institute State Grid Tianjin Electric Power Company Hedong District Tianjin 300171 China

To address the challenges posed by strong noise interference in photovoltaic (PV) sequences and the issues of low accuracy and poor generalization of a single model in PV power prediction, we propose a short-term PV power prediction method. This method uses feature optimization and a hybrid improved Grey Wolf algorithm to optimize the BiLSTM network. Firstly, the mutual information algorithm is employed for variable selection in input data to eliminate redundant variables. Subsequently, the Complementary Ensemble Empirical Mode Decomposition and an improved wavelet threshold algorithm are applied to the selected data for feature reconstruction to reduce noise interference in the data and optimize input variable features. Finally, the standard Grey Wolf Optimizer algorithm underwent hybrid optimization by integrating improved Tent chaotic mapping, nonlinear decreasing factors, dynamic weight strategies, and the differential evolution algorithm. This process aimed to ascertain the optimal hyperparameter combination for the BiLSTM network. The attention mechanism was also employed to extract key temporal information from the data, developing a novel short-term photovoltaic power prediction model. Simulation experiments demonstrate that, compared to the least squares support vector machine, long short-term memory network, and bidirectional long short-term memory neural network, the proposed model achieves an average reduction of 12.45%, 7.95%, and 5.37% in root mean square error under various weather conditions such as sunny, cloudy, overcast, and rainy, showcasing excellent predictive performance, good generalization ability, and promising engineering application value. © 2025 Power System Technology Press. All rights reserved.

关键词： Mean square error

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南阳坡矿8704综放工作面顶板密集孔预裂技术应用

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现代矿业 2022年第4期38卷 103-105,109页

作者：高如意晋能控股煤业集团铁峰煤业公司南阳坡矿

为防止工作面回采期间悬顶面积过大、垮落而造成安全事故,对南阳坡矿8#煤层8704工作面顶板进行预裂。结合矿井地质及经济情况,采用密集孔预裂处理。打入密集孔后形成一条弱化带,从整体上改变顶板的强度,使其更容易垮落。实践结果表明:... 详细信息

为防止工作面回采期间悬顶面积过大、垮落而造成安全事故,对南阳坡矿8#煤层8704工作面顶板进行预裂。结合矿井地质及经济情况,采用密集孔预裂处理。打入密集孔后形成一条弱化带,从整体上改变顶板的强度,使其更容易垮落。实践结果表明:在回采过程中采取打预裂孔干预后,顶板垮落正常,悬顶面积减小,矿压显现不明显,极大提高了煤炭资源回收率。该方案为顶板安全管理提供了参考。

关键词：悬顶顶板垮落密集孔顶板预裂

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技术丰富环境下的课堂教学活动设计研究

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中国电化教育 2017年第6期 17-23页

作者：钱冬明李如意高幼萍华东师范大学上海数字化教育装备工程技术研究中心上海200062 人教数字出版有限公司北京100010 华东师范大学教育信息技术学系上海200062

构建以电子书包为代表的技术丰富课堂环境,并在此基础上开展数字技术支持下的教育活动实践,是目前中小学开展智慧学习的实践热点。该文在上海市闵行区电子书包项目实践应用的背景下,研究针对教师难以在技术丰富环境下有效融入信息化技... 详细信息

构建以电子书包为代表的技术丰富课堂环境,并在此基础上开展数字技术支持下的教育活动实践,是目前中小学开展智慧学习的实践热点。该文在上海市闵行区电子书包项目实践应用的背景下,研究针对教师难以在技术丰富环境下有效融入信息化技术开展教学这一困惑,以小学语文阅读优秀课堂实例为依据,通过分析35节优秀教学课例视频,用自底向上的方式探索技术丰富环境下的课堂教学活动设计,从教学环节、实施方式、组织形式和教学时间四个维度出发,依据实践数据分析得出目前电子书包环境下语文阅读课教学活动的一般模式,从而为教师开展常态化教学提供参考。

关键词：技术丰富电子书包教学活动语文阅读

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胡小英从“胃以喜为补”调治小儿厌食症经验探微

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中国中医药图书情报杂志 2024年第5期48卷 228-230页

作者：高如意胡小英广州中医药大学第一附属医院广东广州510405

厌食症患儿常有服药困难。胡小英教授运用“胃以喜为补”理论调治厌食症患儿,顺从小儿之“胃喜”,诱导开胃,循序渐进,使小儿纳食增加,营养得到补充,临床获得良好疗效。本文以胡教授临床经验心得为基础探讨相关思路与方法,并附验案1则,... 详细信息

厌食症患儿常有服药困难。胡小英教授运用“胃以喜为补”理论调治厌食症患儿,顺从小儿之“胃喜”,诱导开胃,循序渐进,使小儿纳食增加,营养得到补充,临床获得良好疗效。本文以胡教授临床经验心得为基础探讨相关思路与方法,并附验案1则,以资验证。

关键词：胃以喜为补小儿厌食症调护脾胃中医药疗法名医经验

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茯苓山药枸杞固体饮料的制备

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食品与发酵工业 2022年第1期48卷 211-217页

作者：王振东柏伟荣刘世娟范业文高如意江苏康缘药业股份有限公司江苏连云港222001

采用茯苓、山药、枸杞子、黄精、玉竹、人参等为原料,研究与开发一款具有滋阴补肾、缓解体力疲劳功能的植物固体饮料。采用单因素试验与正交试验方法对浓缩液的喷雾干燥工艺进行优化,获得最佳喷雾干燥工艺参数;采用感官评价法选择适宜... 详细信息

采用茯苓、山药、枸杞子、黄精、玉竹、人参等为原料,研究与开发一款具有滋阴补肾、缓解体力疲劳功能的植物固体饮料。采用单因素试验与正交试验方法对浓缩液的喷雾干燥工艺进行优化,获得最佳喷雾干燥工艺参数;采用感官评价法选择适宜的甜味剂与酸味剂来确定茯苓山药枸杞固体饮料的最适食用口感。结果表明,喷雾干燥最佳工艺条件为进风温度170℃、恒流泵流速45 r/min、雾化器转速21000 r/min、助干剂麦芽糊精含量15%,具有较好的集粉率。优选制粒方法为干法制粒,按照最佳配方比例喷干粉:麦芽糊精:甜菊糖苷:维生素C为1∶1∶0.02∶0.045进行制备,所获得的茯苓山药枸杞固体饮料具有酸甜可口、香气浓郁协调一致等优点,不添加防腐剂与色素,健康安全,携带与饮用方便,易被大多数人所接受。

关键词：固体饮料喷雾干燥正交试验干法制粒制备工艺

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禽流感病毒感染鸽的流行病学与致病机理研究进展

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病毒学报 2021年第2期37卷 483-493页

作者：刘开拓高如一王晓泉刘秀梵扬州大学兽医学院农业部畜禽传染病学重点开放实验室扬州225009 江苏省动物重要疫病与人兽共患病防控协同创新中心扬州225009 江苏省人畜共患病重点实验室扬州225009

禽流感病毒(Avian influenza virus,AIV)不仅严重危害禽类,而且对人类生命健康造成严重威胁。鸽作为留鸟,具有作为AIV从野生鸟类传播至人类中间宿主的潜能。鸽对AIV的易感性以及在病毒传播中的作用却存在争议。通过分析AIV自然感染、人... 详细信息

禽流感病毒(Avian influenza virus,AIV)不仅严重危害禽类,而且对人类生命健康造成严重威胁。鸽作为留鸟,具有作为AIV从野生鸟类传播至人类中间宿主的潜能。鸽对AIV的易感性以及在病毒传播中的作用却存在争议。通过分析AIV自然感染、人工感染鸽的流行病学以及实验研究数据,同时回顾了禽流感病毒感染鸽的机制,发现随着病毒的进化和时间的推移,鸽群AIV的感染率也在递增;尤其随着近年具有双受体结合特性的高致病性禽流感病毒(highly pathogenic avian influenza virus,HPAIV)clade2.***.4.4分支H5Nx毒株的出现,其感染鸽后排毒量上升以及鸽体间直接接触传播能力增强。为了有效防控AIV的跨种间传播,有必要加强对鸽感染AIV的流行病学监测和传播特性的研究,特别需要密切关注具双受体结合特性的H5Nx和H7N9 HPAIV对鸽易感性的发展趋势。

关键词：禽流感病毒鸽流行病学致病性

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