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Heterogeneous kinetics of the OH-initiated degradation of fenthion and parathion

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Journal of Environmental Sciences 2023年第11期133卷 161-170页

作者： Yuanhong shang Yongchun Liu Jinfeng Tian Changgeng Liu Xuejun Zhu Jun Wang Dandan chen Wei Tao School of Biological and Chemical Engineering Panzhihua UniversityPanzhihua 617000China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China Medical College Panzhihua UniversityPanzhihua 617000China Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education Sichuan University of Science&EngineeringZigong 643000China

Fenthion and parathion are two representative kinds of organophosphorus pesticides and widely used in *** are directly or indirectly released into the atmosphere by spraying or volatilization ***,their heterogeneous reactivity toward OH radicals has not yet been well ***,this work investigated the heterogeneous kinetics of the OH-initiated degradation of surface-bound fenthion and parathion using a flow *** results showed that OH radicals played an important role in the atmospheric degradation of fenthion and *** average rate constants were(7.20±0.77)×10^(-12) and(10.40±0.60)×10^(−12) cm^(3)/(mol·sec)at a relative humidity(RH)and temperature of 35% and 20℃,respectively,suggesting that they have relatively short lifetimes in the *** addition,a negative RH dependence and a positive temperature dependence of the rate constants were *** Arrhenius expressions of fenthion and parathion were k_(2)=(1.34±0.48)×10^(-9) exp[-(1432.59±105.29)/T]and k_(2)=(1.96±1.38)×10^(-9) exp[-(1619.98±222.02)/T],respectively,and their overall activation energy was estimated to be(11.88±0.87)and(13.48±1.83)kJ/*** experimental results will update the kinetic data of fenthion and parathion in the atmosphere and be helpful to further understand their atmospheric transportation processes.

关键词： Organophosphorus pesticide Heterogeneous kinetics Fenthion Parathion OH radicals

Clinical laboratory features of Meigs’syndrome:a retrospective study from 2009 to 2018

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Frontiers of Medicine 2021年第1期15卷 116-124页

作者： Wenwen shang Lei Wu Rui Xu Xian chen Shasha Yao Peijun Huang Fang Wang Department of Laboratory Medicine the First Affiliated Hospital of Nanjing Medical UniversityNanjing 210029China National Key Clinical Department of Laboratory Medicine Nanjing 210029China

Meigs’syndrome(MS),a rare complication of benign ovarian tumors,is easily misdiagnosed as ovarian cancer(OC).We retrospectively reviewed the clinical laboratory data of patients diagnosed with MS from 2009 to *** carbohydrate antigen 125 and HE4 levels were higher in the MS group than in the ovarian thecoma-fibroma(OTF)and healthy control groups(all P<0.05).However,the serum HE4 levels were lower in the MS group than in the OC group(P<0.001).A routine blood test showed that the absolute counts and percentages of lymphocytes were significantly lower in the MS group than in the OTF and control groups(all P<0.05).However,these variables were higher in the MS group than in the OC group(both P<0.05).The neutrophil-to-lymphocyte ratio(NLR)was also significantly lower,whereas the lymphocyte-to-monocyte ratio was higher in the MS group than in the OC group(both P<0.05).The NLR,platelet-to-lymphocyte ratio,and systemic immune index were significantly higher in the MS group than in the OTF and control groups(all P<0.05).The hypoxia-inducible factor-1 mRNA levels were also significantly higher,whereas the glucose transporter 1,lactate dehydrogenase,and enolase 1 mRNA levels were lower in peripheral CD4+T cells obtained preoperatively in a patient with MS than those in patients with OTF,patients with OC,and controls(all P<0.05).The expression of these four glucose metabolism genes was preferentially restored to normal levels after the tumor resection of MS(P<0.001).These clinical laboratory features can be useful in improving the preoperative diagnostic accuracy of MS.

关键词： Meigs’syndrome ovarian thecoma-fibroma NLR(neutrophil to lymphocyte ratio) CD4^(+)T cells glucose metabolism

Degradation characteristics of insulation near aluminium foil edges inside dry-type bushing cores under electrothermal compound stress

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High Voltage 2022年第6期7卷 1153-1164页

作者： Ming chen Xuandong Liu Yuhang Shao Gaoyi shang Qiaogen Zhang Hao Tang Libao Liu State Key Laboratory of Electrical Insulation and Power Equipment School of Electrical EngineeringXi'an Jiaotong UniversityXi'anChina China Electric Power Research Institute BeijingChina Nanjing Electric High Voltage Bushing Co. NanjingChina

Insulation breakdown of dry-type valve-side bushing cores under electrothermal compound stress has become a key factor limiting the safe and stable operation of the converter *** on slices of the real bushing core,it is observed for the first time that fold,peeling off,and fracture defects exist near the aluminium(Al)foil edge,accompanied by many metal spikes with a curvature radius<4μ*** with a capacitor screen thickness of∼2 mm,an electrical tree model is designed to simulate insulation defects near aluminium foil edges inside dry-type bushing cores,whose insulation degradation characteristics under electrothermal compound stress are investigated *** results show that high temperature significantly increases the dielectric loss heat energy density and Joule heat energy density,accelerating the insulation degradation near Al foil *** parallel crepe paper interface significantly accelerates the growth of electrical trees under AC-superimposed positive DC voltage,while this effect is not significant under AC *** the crepe paper consists of wooden fibres of 10μm diameter,the electrical trees tend to grow along interfaces between fibres and epoxy resin to form“feathery”electrical trees in epoxy resinimpregnated paper samples.

关键词： stress insulation compound

Understanding the physical processes in the evolution of a cold air outbreak over China in late November 2022 from a Lagrangian perspective

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Advances in Climate Change Research 2023年第5期14卷 681-690页

作者： Jin-Ning CHE Bo LIU shang-Feng LI cheng YOU Kara HARTIG Lei chen Department of Atmospheric Science School of Environmental StudiesChina University of GeosciencesWuhan 430074China State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesBeijing 100081China Centre for Severe Weather and Climate and Hydro-Geological Hazards Wuhan 430074China Jilin Provincial Key Laboratory of Changbai Mountain Meteorology and Climate Change Laboratory of Research for MiddleeHigh Latitude Circulation Systems and East Asian MonsoonInstitute of Meteorological Sciences of Jilin ProvinceChangchun 130062China Alfred Wegener Institute Helmholtz Centre for Polar and Marine ResearchPotsdam 14473Germany Department of Physics Harvard UniversityCambridge 02138USA

From 26 November to 1 December 2022,intense cold air masses swept across China from northwest to south,resulting in a nationwide cold air outbreak(CAO)case characterised by drastic and sudden temperature drops with rain,snow and strong *** physical processes that dominate the intensification of the cold air masses during this CAO event remain *** this study,the evolution of the CAO case,which is indicated by the dry static energy(DSE),is investigated using a novel approach in the framework of Lagrangian *** dominant processes can be identified by decomposing the DSE change into four diabatic heating terms due to shortwave radiation,longwave radiation,latent heat and turbulent ***,in this case,most of the cold air parcels originated from the east of Novaya Zemlya and crossed Central Siberia before reaching ***,these air parcels mainly manifested on the northwest‒southeast *** duration of the cold air intensification differed between *** cold air parcels experienced long cooling periods(approximately 9 d)before reaching northern China(***,North and Northeast China),whilst the southern parts(***,East and South China)underwent relatively short cooling periods(6-8 d).Accordingly,the cold air affecting northern China is more intense than that affecting the southern parts,especially for East and South *** all six subregions,longwave radiative cooling is identified as the dominant contributor to the cold air intensification,and the latent heat processes as the secondary *** weakening of cold air parcels as they approach and pass over these regions is driven by turbulent processes and shortwave *** Siberia and Lake Baikal are identified as key areas for the intensification of cold air passing over both *** addition,air parcels affecting Northwest China are intensely cooled as they pass over the Junggar Basin,while the North China Plain is a key area for cooli

关键词： Cold air outbreak HYSPLIT Dry static energy Temperature tendency Diabatic heating

A 602-year Reconstruction of July-June Streamflow in the Kuqa River, China, Reveals the Changing Hydrological Signals of the Tarim Basin

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Acta Geologica Sinica(English Edition) 2020年第3期94卷 690-697页

作者： shang Huaming chen Feng WEI Wenshou MAO Weiyi ZHANG Ruibo ZHANG Tongwen YU Shulong Key Laboratory of Tree-ring Physical and Chemical Research of China Meteorological Administration/Xinjiang Laboratory of Tree-ring Ecology Institute of Desert MeteorologyChina Meteorological AdministrationUrumqi 830002China Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security Institute of International Rivers and Eco-SecurityYunnan UniversityKunming 650504China

A regional tree-ring width chronology of Schrenk spruce(Picea schrenkiana) was used to determine the annual(previous July to current June) streamflow of the Kuqa River in Xinjiang, China, for the period of 1414–2015. A linear transformation of the tree-ring data accounted for 63.9% of the total variance when regressed against instrumental streamflow during 1957–2006. The model was validated by comparing the regression estimates against independent data. High streamflow periods with a streamflow above the 602-year mean occurred from 1430–1442, 1466–1492, 1557–1586, 1603–1615, 1687–1717, 1748–1767, 1795–1819, 1834–1856, 1888–1910 and 1989–2015. Low streamflow periods(streamflow below the mean) occurred from 1419–1429, 1443–1465, 1493–1556, 1587–1602, 1616–1686, 1720–1747, 1768–1794, 1820–1833, 1857–1887 and 1911–1988. The reconstruction compares well with the tree-ring-based streamflow series of the Tizinafu River from the Kunlun Mountains;both show well-known severe drought events. The streamflow reconstruction also shows highly synchronous upward trends since the 1980 s, suggesting that streamflow is related to Central Asian warming and humidification. Thus, the influences of the extremes and the persistence of low streamflows on local society may be considerable. Climatic changes in the watershed may be responsible for the change in the hydrologic regime of the Tarim Basin observed during the late twentieth century.

关键词： tree rings streamflow reconstruction Kuqa River Tarim Basin

Fluorescent Organohydrogel with Thermal-Induced Color Change for Anti-counterfeiting

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Chinese Journal of Chemistry 2022年第3期40卷 337-342页

作者： Xiaoxia Le Hui shang Shirong Gu Guangqiang Yin Fuqing Shan Danyang Li Tao chen 无 Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Material Technology and EngineeringChinese Academy of SciencesNingboZhejiang 315201China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China Department of Orthopedics Lihuili Hospital of Ningbo Medical CenterNingboZhejiang 315048China

Smart fluorescent patterns enable dynamic color variation under external stimuli,showing a much higher security level in the field of ***,there is still lacking of a simple and convenient way to achieve dynamic fluorescence ***,a fluorescent organohydrogel made up of a poly(N,/N-dimethylacrylamide-co-isopropylacrylamide)(p(DMA-NIPAM))hydrogel network and a polyflauryl methacrylate)(PLMA)organogel network was fabricated via a two-step interpenetrating *** former network bears naphthalimide moieties(DEAN,green fluorescent monomer)and the later contains 6-acrylamidopicolinic acid(6APA,fluorescent ligand),leading to emitting green *** Eu^(3+) was introduced and coordinated with 6APA,the organohydrogel displays red fluorescence,which can further emit yellow after applying thermal ***,by adjusting the proportion of comonomers,various organohydrogels can be obtained,which can be programmed and act as an effective platform for the encryption and decryption of secret information.

关键词： Dyes/pigments Fluorescence Gels Information encryption Stimuli responsiveness

Optimum Driving System Design for Dual-Motor Pure Electric Vehicles

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Journal of Beijing Institute of Technology 2020年第4期29卷 592-602页

作者： Hongwei Zhang Weichi chen Zhuangzhuang shang Zhifeng Xu Zepeng Gao Yong chen Hongbin Ren Automobile Research Institute School of Mechanical EngineeringBeijing Institute of TechnologyBeijing 100081China Automotive Engineering Institute Guangzhou Automobile Group Co.Ltd.Guangzhou 511434China Beijing Electric Vehicle Co.Ltd. Beijing 100081China

A pure electric vehicle driven by dual motors is taken as the research object and the driving scheme of the driving motor is improved to increase the transmission efficiency of existing electric *** on the architecture of the transmission system,we propose vehicle performance parameters and performance indexes of a pure electric vehicle,a time-sharing driving strategy of dual ***,the parameters of the battery,motor,and transmission system are ***,the electric vehicle transmission model is built in Amesim and the control strategy is designed in *** the optimization goal of improving the vehicle’s dynamic performance and driving range,the optimal parameters are determined through ***,the characteristics of the motor are tested on the *** results show that the energy-saving potential of the timesharing driven double motor is higher,and the driving mileage of the double motor drive is increased by 4%.

关键词： pure electric vehicle vehicle powertrain parameter matching time sharing drive

Correlation analysis between characteristics under gastroscope and image information of tongue in patients with chronic gastritis

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Journal of Traditional Chinese Medicine 2022年第1期42卷 102-107页

作者： shang Zimeng DU Zhengguang GUAN Bei JI Xingyu chen Longchang WANG Yongji MA Yun Clinical College of Traditional Chinese Medicine Capital Medical UniversityBeijing 100013China College of Traditional Chinese Medicine Capital Medical UniversityBeijing 100069China Department of Gastroenterology Beijing Traditional Chinese Medicine Hospital Affiliated to Capital Medical UniversityBeijing 100010China Cooperative Innovation Center Institute of SoftwareChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Computer Science Institute of Softwarethe Chinese Academy of SciencesBeijing 100190China

OBJECTIVE:To explore the correlation between diagnostic information of tongue and gastroscopy results of patients with chronic ***:Frequent pattern growth(FP-Growth),SPSS Modeler was used to analyze the correlation rules between the image information of tongue parameters and the characteristics of the stomach and duodenum seen under ***:Ranking in order of confidence:cyanotic tongue,slippery fur,yellow fur and spotted tongue were sequently associated with both gastric antrum mucosal hyperemia or edema and gastric antrum mucosal erythema/macula.L,one value of tongue coating color,which counted among(30,60),tooth-marked tongue and b,one value of tongue coating color,which counted in the range of(5,20)were sequently associated with gastric antrum mucosal erythema/macula.A,one value of tongue body color,which counted in the range of(0,20),was related to both gastric antrum mucosal hyperemia or edema and gastric antrum mucosal erythema/macula.a,one value of tongue coating color,which counted in the range of(15,35),was associated with gastric antrum mucosal erythema/*** are a total of 9 strong correlation ***:Cyanotic tongue,slippery fur,yellow fur,the CIE Lab value of tongue coating,a,the value of tongue body color,spotted tongue,and tooth-marked tongue are all related to the gastric antrum mucosal hyperemia or edema and gastric antrum mucosal erythema/*** conditions of gastric mucosa could be predicted by the examination of the above related image information of tongue.

关键词： gastritis tongue stomach duodenum correlation of data frequent pattern growth algorithm

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Investigation on photonic crystal nanobeam cavity based on mixed diamond–circular holes

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Nanotechnology and Precision Engineering 2024年第1期7卷 63-70页

作者： Jingtong Bin Kerui Feng shang Ma Ke Liu Yong cheng Jing chen Qifa Liu College of Telecommunication and Information Engineering Nanjing University of Posts and TelecommunicationsNanjing 210003China College of Electronic and Optical Engineering and College of Flexible Electronics(Future Technology) Nanjing University of Posts and TelecommunicationsNanjing 210003China State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong UniversityShanghai 200240China

A photonic crystal nanobeam cavity(M-PCNC)with a structure incorporating a mixture of diamond-shaped and circular air holes is *** performance of the cavity is simulated and studied *** theﬁnite-difference time-domain method,the parameters of the M-PCNC,including cavity thickness and width,lattice constant,and radii and numbers of holes,are optimized,with the quality factor Q and mode volume Vm as performance *** modulation of the lattice constant and hole radius enable the proposed M-PCNC to realize outstanding *** optimized cavity possesses a high quality factor Q 1.45105 and an ultra-small mode=×volume Vm 0.01(λ/n)[Zeng et al.,Opt Lett 2023:48;3981–3984]in the telecommunications wavelength *** can be progres-=sively squeezed in both the propagation direction and the perpendicular in-plane direction by a series of interlocked anti-slots and slots in the diamond-shaped hole ***,the energy can be conﬁned within a small mode volume to achieve an ultra-high Q/Vm ratio.

关键词： Photonic crystal nanobeam cavity Mixed diamond–circular holes Slots and anti-slots FDTD simulation Quality factor Mode volume