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Elaborations of the influencing factors on the formation of secondary inorganic aerosols in a heavily polluted urban area of China

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Journal of Environmental Sciences 2024年第4期138卷 406-417页

作者： Shuang Wang Qiyuan Wang Ting Zhang Suixin Liu Steven Sai Hang Ho Jie Tian Hui Su Yong Zhang Luyao Wang Tingting Wu Junji Cao School of Human Settlements and Civil Engineering Xi’an Jiaotong UniversityXi’an 710049China Key Laboratory of Aerosol Chemistry and Physics State Key Laboratory of Loess and Quaternary GeologyInstitute of Earth EnvironmentChinese Academy of SciencesXi’an 710061China CAS center for Excellence in Quaternary Science and Global Change Xi’an 710061China National Observation and Research Station of Regional Ecological Environment Change and Comprehensive Management in the Guanzhong Plain Xi’an 710061China Division of Atmospheric Sciences Desert Research InstituteRenoNevada89512United States Hong Kong premium Services and Research Laboratory KowloonHong Kong SARChina Xi’an Institute for Innovative Earth Environment Research Xi’an 710061China Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China

In this study,online water-soluble inorganic ions were detected to deduce the formation mechanism of secondary inorganic aerosol in Xianyang,China during *** dominant inorganic ions of sulfate(SO_(4)^(2-)),nitrate(NO_(3)^(-)),and ammonium(NH_(4)^(+))(the sum of those is abbreviated as SNA)accounted for 17%,21%,and 12% of PM_(2.5)mass,*** the air quality deteriorated from excellent to poor grades,the precursor gas sulfur dioxide(SO_(2))of SO_(4)^(2-)increased and then decreased with a fluctuation,while nitrogen dioxide(NO_(2))and ammonia(NH_(3)),precursors of NO_(3)^(-)and NH_(4)^(+),and SNA show increasing *** factors including boundary layer height(BLH),temperature,and wind speed also show decline trends,except relative humidity(RH).Meanwhile,the secondary conversion ratio shows a remarkable increasing trend,indicating that there was a strong secondary *** the perspective of chemical mechanisms,RH is positively correlated with sulfur oxidation ratios(SOR),nitrogen oxidation ratios(NOR),and ammonia conversion ratios,representing that the increase of humidity could promote the generation of ***,SOR and NOR were also positively related to the *** the one hand,the low wind speed and BLH led to the accumulation of *** the other hand,the increases of RH and ammonia promoted more formations of SNA and PM_(2.5).The results advance our identification of the contributors to the haze episodes and assist to establish more efficient emission controls in Xianyang,in addition to other cities with similar emission and geographical characteristics.

关键词： Haze episodes Secondary inorganic aerosol Secondary conversion ratio Meteorological factors

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Effect of cathodic potential on stress corrosion cracking behavior of different heat-affected zone microstructures of E690 steel in artificial seawater

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Journal of Materials Science & Technology 2021年第5期64卷 141-152页

作者： Yong Li Zhiyong Liu Endian Fan Yunhua Huang Yi Fan Bojie Zhao National Materials Corrosion and Protection Data center University of Science and Technology BeijingBeijing 100083China Jiangsu key laboratory for premium steel material Nanjing Iron&Steel United Co.Ltd.Nanjing 210035China

In this work,the stress corrosion cracking(SCC)behavior of E690 steel base metal(BM)and different heat-affected zone(HAZ)microstructures,i.e.,coarse grain HAZ(CGHAZ),fine grain HAZ(FGHAZ),and intercritical HAZ(ICHAZ),was investigated at different cathodic potentials in artificial seawater by slow strain rate tensile tests,scanning electron microscopy and electron back-scattered diffraction *** results show that the HAZ microstructures and BM exhibit different SCC susceptibilities:FGHAZ

关键词： Low-carbon bainite steel Heat-affected zone microstructure Cathodic potential Stress corrosion cracking Hydrogen embrittlement

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Preparation and electrochemical behaviour of Ti/Mn_(2)O_(3)coating anode

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Rare Metals 2023年第7期42卷 2197-2203页

作者： Fa-Ming Xie Lin Tian Chuan-Bin Li Xue-Tao Yuan Yan-Xi Yin GRINM Resources and Environment Tech.Co. LtdBeijing101047China National Engineering Research center for Environment-Friendly Metallurgy in Producing premium Non-Ferrous Metals Beijing101047China China General Research Institute for Nonferrous Metals Beijing100088China Beijing Engineering Research center of Strategic Nonferrous Metals Green Manufacturing Technology Beijing101047China

Owing to the excellent electrocatalytic activity,corrosion resistance and high cell potential of the dimensionally stable anodes(DSA),DSAs have great application potential in metallurgical electrolysis *** this resear... 详细信息

关键词： coating corrosion resistance

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Clinical characteristics of myocardial infarction with non-obstructive coronary arteries in young patients

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China Medical Abstracts(Internal Medicine) 2022年第1期39卷 34-35页

作者： ZHANG Haihua premium center Natl Cardiovasc Dis Center&Fuwai HospCAMS&PUMCBeijing 100037

Objective To investigate the clinical characteristics of myocardial infarction with non-obstructive coronary arteries(MINOCA)in young *** A total of 593 young patients(≤40 years old)diagnosed with acute myocardial infarction(AMI)and undergoing coronary angiography at Fuwai Hospital from January 2009 to July 2013 were enrolled in this retrospective analysis.

关键词： coronary infarction patients

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The effect of crack tip environment on crack growth behaviour of a low alloy steel at cathodic potentials in artificial seawater

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Journal of Materials Science & Technology 2020年第19期54卷 119-131页

作者： Yong Li Zhiyong Liu Endian Fan Zhongyu Cui Jinbin Zhao Corrosion and Protection center University of Science and Technology BeijingBeijing 100083China Shandong Key Laboratory of Corrosion Science Institute of OceanologyChinese Academy of SciencesQingdao 266071China School of Materials Science and Engineering Ocean University of Chin1Qingdao 266100China Jiangsu Key Laboratory for premium Steel Material Nanjing Iron&Steel United Co.Ltd.Nanjing 210035China

The environment at crack tip and its effect on the crack growth behaviour of low alloy steel-E690 steel were studied at cathodic potentials in artificial *** results showed that the micro environment at crack tip and crack growth behaviour were related to the electrochemical reactions at crack tip,which were affected by the stress state and applied *** crack tip environment was acidified under cyclic loading,resulting from the crack tip anodic dissolution reaction and corresponding hydrolysis *** of the hydrogen evolution and the inhibited anodic dissolution inside the crack,the crack tip p H increases as the cathodic potential *** effect of cathodic potentials on the electrochemical reactions caused the variation of the hydrogen content,which influenced the crack growth rate because the crack growth behaviour was controlled by hydrogen embrittlement *** resulted in a fact that with the negative decrease of potential,the crack growth rate first decreased and then increased,with the minimum rate at-0.75 *** the crack growth path exhibited transgranular fracture.

关键词： Low alloy steel Stress state Cathodic potential Crack tip environment Crack growth behaviour

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Kinetics, thermodynamics, and equilibrium of As(Ⅲ),Cd(Ⅱ), Cu(Ⅱ) and Pb(Ⅱ) adsorption using porous chitosan bead-supported MnFe_(2)O_(4) nanoparticles

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International Journal of Mining Science and Technology 2021年第6期31卷 1107-1115页

作者： Hongxia Li Hongbing Ji Xinglan Cui Xiaokui Che Qidong Zhang Juan Zhong Rongzhen Jin Lei Wang Yi Luo National Engineering Research center for Environment-friendly Metallurgy in Producing premium Non-ferrous Metals GRINM Resources and Environmental Technology Corporation LimitedBeijing 101407China Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollution School of Energy and Environmental EngineeringUniversity of Science and Technology BeijingBeijing 100083China GRINM Group Corporation Limited Beijing 100088China GRIMAT Engineering Institute Corporation Limited Beijing 100088China

A novel porous nanocomposite,cross-linked chitosan and polyethylene glycol(PEG) bead-supported MnFe_(2) O_(4) nanoparticles(CPM),was developed as an efficient adsorbent to remove metalloid(As(Ⅲ))and heavy metals(Cd(Ⅱ),Cu(Ⅱ),and Pb(Ⅱ)).The characteristics of CPM showed a porous structure,well dispersed MnFe_(2) O_(4),and several of hydroxyl and amino groups(-OH,-NH_(2)).Batch experiments demonstrated that the best adsorption property of As(Ⅲ),Cd(Ⅱ),Cu(Ⅱ),and Pb(Ⅱ) was achieved within 8 h with maximum adsorption capacities of 9.90,9.73,43.94,and 11.98 mg/g,*** and synergistic effects(particularly precipitation) were included in the co-adsorption mechanism of As(Ⅲ) and heavy ***,As(Ⅲ) was partly oxidized by MnFe_(2) O_(4) to As(V),and both were coordinated on MnFe_(2) O_(4) ***(Ⅱ) could also bind to MnFe_(2) O_(4) by ion exchange and electrostatic ***,Cd(Ⅱ) and Cu(Ⅱ) tended to be coordinated on ***,CPM can serve as a remediation material for water and soil co-contaminated with As(Ⅲ) and heavy metals.

关键词： Equilibrium Adsorption Arsenic Cadmium Chitosan MnFe_(2)O_(4)nanoparticles

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Ovule number as a rising star for regulating seed yield: Hope or hype

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Journal of Integrative Agriculture 2024年第11期23卷 3623-3640页

作者： Shahid Ullah Khan Ahmad Ali Sumbul Saeed Yonghai Fan Ali Shehazd Hameed Gul Shah Fahad Kun Lu Integrative Science center of Germplasm Creation in Western China (Chongqing) Science City and Southwest University College of Agronomy and BiotechnologySouthwest University Engineering Research center of South Upland Agriculture Ministry of Education Women Medical and Dental College Khyber Medical University National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural University School of Environment and Science Griffith University College of Agronomy and Biotechnology Southwest University Department of Agronomy Abdul Wali Khan University Mardan Department of Natural Sciences Lebanese American University

Rapeseed(Brassica napus L.) is the second most widely grown premium oilseed crop globally, mainly for its vegetable oil and protein meal. One of the main goals of breeders is producing high-yield rapeseed cultivars with sustainable production to meet the requirements of the fast-growing population. Besides the pod number, seeds per silique(SS), and thousand-seed weight(TSW), the ovule number(ON) is a decisive yield determining factor of individual plants and the final seed yield. In recent years, tremendous efforts have been made to dissect the genetic and molecular basis of these complex traits, but relatively few genes or loci controlling these traits have been reported thus far. This review highlights the updated information on the hormonal and molecular basis of ON and development in model plants(Arabidopsis thaliana). It also presents what is known about the hormonal, molecular, and genetic mechanism of ovule development and number, and bridges our understanding between the model plant species(A. thaliana) and cultivated species(B. napus). This report will open new pathways for primary and applied research in plant biology and benefit rapeseed breeding programs. This synopsis will stimulate research interest to further understand ovule number determination, its role in yield improvement, and its possible utilization in breeding programs.

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Simultaneously Improving Mechanical Properties and Stress Corrosion Cracking Resistance of High-Strength Low-Alloy Steel via Finish Rolling within Non-recrystallization Temperature

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Acta Metallurgica Sinica(English Letters) 2021年第4期34卷 565-578页

作者： Hongchi Ma Baijie Zhao Yi Fan Kui Xiao Jinbin Zhao Xuequn Cheng Xiaogang Li Key Laboratory for Corrosion and Protection(MOE) Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing100083China Jiangsu Key Laboratory for premium Steel Materials Nanjing Iron&Steel United Co.Ltd.Nanjing210035China State Key Laboratory of Metal Material for Marine Equipment and Application AnsteelAnshan114021China

The effect of hot rolling process on microstructure evolution,mechanical properties and stress corrosion cracking(SCC)resistance of high-strength low-alloy(HSLA)steels was investigated by varying the finish rolling temperature(FRT)and total rolling *** results revealed granular bainite with large equiaxed grains was obtained by a total rolling reduction of60%with the FRT of 950℃(within recrystallization temperature T_(r)).The larger grain size and much less grain boundaries should account for the relatively lower strength and SCC resistance.A larger rolling reduction of 80% under the same FRT resulted in the formation of massive martensite-austenite(M/A)constituents and resultant low ductility and SCC *** contrast,a good combination of strength,ductility and SCC resistance was obtained via 80% rolling reduction with the FRT of 860℃(within non-recrystallization temperature T_(nr)),probably because of the fine grain size and M/A constituents,as well as a high density of grain boundary network.

关键词： High-strength low-alloy(HSLA)steel Finish rolling temperature Non-recrystallization temperature Stress corrosion cracking(SCC) Grain boundary character Martensite-austenite(m/a)constituents

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Application of response surface methodology in optimization of bioleaching parameters for high-magnesium nickel sulfide ore

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Journal of Central South University 2022年第5期29卷 1488-1499页

作者： SUN Jian-zhi WU Biao CHEN Bo-wei WEN Jian-kang GRINM Resources and Environment Tech.Co. Ltd.Beijing 101407China GRIMAT Engineering Institute Co. Ltd.Beijing 101407China National Engineering Research center for Environment-friendly Metallurgy in Producing premium Non-ferrous Metals Beijing 100088China GRINM Group Co. Ltd.Beijing 100088China

The response surface methodology(RSM)was used to optimize the operating parameters during the bioleaching of Jinchuan high-magnesium nickel sulfide *** particle size,acid addition,pulp density and inoculation amount were chosen as the investigated *** maximize the leaching efficiency of nickel,copper,cobalt and minimize the dissolution of magnesium and iron ions,the model suggested a combination of optimal parameters of particles less than 0.074 mm being 72.11%,sulfuric acid addition being 300 kg/t,pulp density being 5%and inoculation amount being 12.88%.Under the conditions,the average results of three parallel experiments were 89.43%of nickel leaching efficiency,36.78%of copper leaching efficiency,84.07%of cobalt leaching efficiency,49.19%of magnesium leaching efficiency and 0.20 g/L of iron *** model indicated that the most significant factor in response of the leaching efficiency of valuable metal is the particle size,and the most significant factor in response to the leaching efficiency of harmful ions(Mg2+)is the amount of sulfuric acid *** according to the suggested models,no significance of the interaction effect between particle size and acid addition was *** the optimized parameters suggested by models,the valuable metals could be separated from harmful ions during the bioleaching process.

关键词： high-magnesium nickel sulfide ore bioleaching response surface methodology particle size acid consumption

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Optimizing the cancer research landscape for the benefit of patients and society: A strategic perspective of the German Cancer Research center (DKFZ) and its partnerships with university medical centers

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Cancer Biology & Medicine 2022年第11期19卷 1517-1522页

作者： Michael Baumann German Cancer Research center(DKFZ) Heidelberg 69120Germany

This issue of Cancer Biology & Medicine, a premium Chinese international scientific journal in this field, focuses on cooperation between Chinese and German cancer research, particularly between the Tianjin Medical University Cancer Institute & Hospital and the German Cancer Research center(DKFZ) with its networking partners. This editorial provides a brief overview on DKFZ’s research strategy with a focus on how a national integrated cancer research and care ecosystem is evolving that benefits patients and society.

关键词： Cancer landscape centers

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