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An exploration of meteorological effects on PM2.5 air quality in several provinces and cities in Vietnam

Journal of Environmental Sciences 2024年第11期145卷 139-151页

作者： Giang Tran Huong Nguyen luan thien la Huy Hoang-Cong Anh Hoang Le Faculty of Chemistry and Environment Dalat UniversityLam Dong ProvinceVietnam Environmental Protection Agency Lam Dong Province Department of Natural Resources and EnvironmentLam Dong ProvinceVietnam Northern Center for Environmental Monitoring Environmental Pollution Control DepartmentHa Noi CityVietnam Faculty of Environment University of ScienceHo Chi Minh CityVietnam Vietnam National University Ho Chi Minh CityVietnam

Linking meteorology and air pollutants is a key *** study investigated meteorological effects on PM_(2.5)concentration using the advanced convergent cross mapping method,utilizing hourly PM_(2.5)concentration and six meteorological factors across eight provinces and cities in *** demonstrated that temperature(ρ=0.30)and radiation(ρ=0.30)produced the highest effects,followed by humidity(ρ=0.28)and wind speed(ρ=0.24),while pressure(ρ=0.22)and wind direction(ρ=0.17)produced the weakest effects on PM_(2.5)*** theρvalues showed that temperature,wind speed,and wind direction had greater impacts on PM_(2.5)concentration during the dry season whereas radiation had a more influence during the wet season;Southern stations experienced larger meteorological ***,humidity,pressure,and wind direction had both positive and negative influences on PM_(2.5)concentration,while radiation and wind speed mostly had negative *** PM_(2.5)pollution episodes,there wasmore contribution ofmeteorological effects on PM_(2.5)concentration indicated byρ*** contaminated levels,humidity(ρ=0.45)was the most dominant factor affecting PM_(2.5)concentration,followed by temperature(ρ=0.41)and radiation(ρ=0.40).Pollution episodes were pointed out to be more prevalent under higher humidity,higher pressure,lower temperature,lower radiation,and lower wind ***ρcalculation also revealed that lower temperature,lower radiation,and higher humidity greatly accelerated each other under pollution episodes,further enhancing PM_(2.5)*** findings contributed to the literature on meteorology and air pollution interaction.

关键词： Fine particulate matter Air pollution Meteorological effect Convergent cross mapping Causality analysis Vietnam

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Thermal Annealing and Graphene Modification of Exfoliated Hydrogen Titanate Nanosheets for Enhanced Lithium-ion Intercalation Properties

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Journal of Materials Science & Technology 2014年第9期30卷 839-846页

作者： Xinning luan Ying Wang Department of Mechanical and Industrial Engineering Louisiana State UniversityBaton Rouge LA 70803 USA

Hydrogen titanate has been considered as a promising lithium intercalation material due to its unique layered structure. In the present work, we fabricate 2D graphene/hydrogen titanate hybrid nanosheets for application as anode materials in lithium-ion batteries. H2Ti307 nanosheets are synthesized by exfoliation of a layered precursor via interacting bulky tetrabutylammonium （TBA＋） cations, followed by ion exchange with Na＋ ions and washing with water. The as-prepared hydrogen titanate nanosheets are well-dispersed exhibiting ultra-thin thickness with a lateral size up to a few micrometers. The sample is then annealed at 450, 650 Rnd 850 ℃, to optimize its Li＋-intercalation property. Heating at 450 ℃ leads to well-crystallized hydrogen titanate with a trace amount of TiO2. Heating at 650 and 850 ℃ results in mixed sodium titanates, since some sodium ions in the interlayer structure cannot be washed away and become chemically bonded to [TiO6] octahedra at high temperatures. Electrochemical properties of all the four samples are then evaluated by charged/discharged for 100 electrochemical cycles at 0.01-2.5 V vs. Li＋/Li at a specific current of 170 mA g-1. The unannealed hydrogen titanate delivers the highest initial discharge capacity of 130.5 mA h g-l, higher than 124.6 mA h g-1 from hydrogen titanate annealed at 450 ℃, as well as 101.3 and 63.8 mA h g-1 from hydrogen titanate annealed at 650 and 850℃, respectively, due to the high surface area from well-dispersed unannealed nanosheets. However, after 100 electrochemical cycles, well-crystallized hydrogen titanate annealed at 450 ℃ retain the highest charge capacity of 115.2 mA h g-1, corresponding to a capacity retention of 92.5%, while unannealed hydrogen titanate exhibits a final capacity of 72.1 mA h g-1 and a capacity retention of only 55.2%. To further improve energy density of lithium-ion battery, graphene/hydrogen titanate hybrid nanosheets are fabricated by adding graphene nanosheets into hydrogen titanates

关键词： Hydrogen titanate Sodium titanate Graphene nanosheets Exfoliation process Lithium-ion battery

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Conversion of nitrogen and carbon in enriched paddy soil by denitrification coupled with anammox in a bioelectrochemical system

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Journal of Environmental Sciences 2022年第1期34卷 197-207页

作者： luan Zhang Minghe Jiang Shungui Zhou Fujian Provincial Key laboratory of Soil Environmental Health and Regulation College of Resources and EnvironmentFujian Agriculture and Forestry UniversityFuzhou 350002China

The aim of this study is to investigate conversion of nitrogen and COD in enriched paddy soil by nitrification coupled with anammox process in a dual chamber bioelectrochemical *** paddy soil was enriched for denitrification coupled with anammox by microbial consortia and was acclimatized in the cathodic chamber of microbial fuel cells(MFCs).The bioelectrochemical systems were treated with different ammonium concentrations in the cathodic chamber:the MFC with low concentration ammonium(la-MFC,50 mg/L ammonium),the MFC with medium concentration ammonium(MA-MFC,500 mg/L ammonium),and MFC with high concentration ammonium(HA-MFC,1000 mg/L ammonium),and the initial COD in the anodic chamber was 1200 mg/*** CK treatments were conducted with1000 mg/L ammonium under the same conditions,except without inoculum in the cathode *** consumption rate of ammonium in the cathodic chambers of CK,la-MFC,MA-MFC,and HA-MFC were 9%,64%,84%,and 84%,*** degradation rate for COD achieved in the anode chambers of CK,la-MFC,MA-MFC,and HA-MFC were 70%,86%,93%,and 93%,*** analysis of the microbial community of three treated MFCs in the cathode chamber indicated that the nitrification-denitrification process occurs in the cathode *** dominant species for nitrification was Nitrospira,and the dominant species for denitrification were Denitratisoma,Dechloromonas,and Candidatus_***,anammox process also observed in the cathode *** functional genes nir S/K,hzs B,and 16S rDNA were assessed by qPCR analysis,and the results confirmed the presence of denitrification-coupled anammox in the cathodic chamber.

关键词： Paddy soil Bioelectrochemical system Denitrification Anammox Microbial community

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Criteria of limiting temperature and parametric analysis of the large deflection behavior for fully restrained steel beams in fire

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Science China(Technological Sciences) 2012年第1期55卷 264-275页

作者： XI Feng luan YanPing Shandong Provincial Key laboratory of Structural Engineering School of Civil Engineering Shandong Jianzhu University Jinan 250101 China School of Civil Engineering Shandong Jianzhu University Jinan 250101 China

This paper mainly involve 3 parts:1) To apply the minimum principle of acceleration in dynamics of elastic-plastic continua at finite deformation to the statics problems,a computing model is presented for the restrained steel beams exposed to the *** this model,both effects of large deflection and thermal expansion deformation are taken into account,and the constitutive equations with the temperature effects are *** a dynamic finite difference(DFD) method is presented by using the dis-crete technique,which can be used in simulating the response of the steel beams at elevated temperature,and the large deflec-tion behavior and catenary action effects of the beams can be adequately *** primary numerical results show that the method is valid and *** with other methods,this technique is very simple,and it can also be further devel-oped to simulate the behavior of steel beams subjected to the coupling loading of explosion and fire when both effects of strain rate and inertia are considered.2) By using this DFD method,detailed parametric analysis are presented so as to check the consistency of response results for several different formulas of thermal expansion deformation and retention factors of steel at elevated temperature,the influence of these parameters on the critical temperature is examined.3) Based on the analysis for the curves of temperature-generalized yield function comprised by the axial force and bending moment,both criteria to determine the limiting temperature(or failure temperature) of large deflection steel beams are presented more explicitly,that is,both lim-iting temperatures can be determined by if the catenary force begins to appear or arrives at the maximum value,*** is shown by numerical results that both limiting temperatures are close to the both critical temperatures which are correspond-ing to the maximum deflections equal to span/20 and span/10,*** conclusion may be helpful to make r

关键词： steel beam fire DFD method large deflection parametric analysis limiting temperature criteria yield function

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内蒙古巴尔哲稀有稀土矿区新发现的碱性流纹岩岩石成因及其地质意义

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地球科学 2024年第4期49卷 1324-1338页

作者：淡凯波张道涵栾钰薇宋崇宇于淼刘常伟洛阳栾川钼业集团股份有限公司河南栾川471000 中国地质大学资源学院湖北武汉430074 中国地质大学地质过程与矿产资源国家重点实验室湖北武汉430074 中国地质调查发展研究中心北京100037 北京市地质灾害防治研究所北京100120 内蒙古赤峰地质矿产勘查开发有限责任公司内蒙古赤峰024005

为查明在内蒙古巴尔哲超大型稀有稀土金属矿区新发现的碱性流纹岩岩石成因,及其与碱性花岗岩成矿岩体、以及邻区阿里乌拉碱性流纹岩的成因联系,开展了锆石U-Pb定年、矿物学和全岩地球化学研究.结果表明,巴尔哲碱性流纹岩喷发年龄为124.4... 详细信息

为查明在内蒙古巴尔哲超大型稀有稀土金属矿区新发现的碱性流纹岩岩石成因,及其与碱性花岗岩成矿岩体、以及邻区阿里乌拉碱性流纹岩的成因联系,开展了锆石U-Pb定年、矿物学和全岩地球化学研究.结果表明,巴尔哲碱性流纹岩喷发年龄为124.4±1.6 Ma,明显年轻于阿里乌拉碱性流纹岩(141 Ma),代表了大兴安岭中南段早白垩世新一期碱性火山岩活动.巴尔哲和阿里乌拉碱性流纹岩具有较高的SiO_(2)、碱金属、TFe_(2)O_(3)、F和较低的Al_(2)O_(3)含量,均归属于钠闪碱流岩.两者均富集轻稀土元素(LREE)和Nb、Ta、Zr、Hf等高场强元素(HFSE),含有较高的Rb、Th、U和极低的Ba、Sr含量.另外,两者具有相同的全岩Nd同位素组成,ε_(Nd)(t)值分别为1.6和1.7~1.8.因此,巴尔哲和阿里乌拉碱性流纹岩均为新生地壳部分熔融的产物.巴尔哲碱性流纹岩与碱性花岗岩成矿岩体形成时代和同位素组成均一致,应属同一岩浆体系不同演化阶段的产物.鉴于火山岩出露范围更广,碱性火山岩可以作为深部稀有稀土金属矿床的重要地质找矿标志,并指出阿里乌拉地区具有该类金属矿产较好的找矿潜力.

关键词：巴尔哲阿里乌拉稀有稀土金属矿床碱性火山岩大兴安岭矿床学

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血清MG7-Ag水平、组织Notch-3水平对胃癌的诊断价值

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中国实验诊断学 2024年第10期28卷 1151-1155页

作者：吴鸾冯秀娟张梅芳拉茸央宗孙静解放军总医院第二医学中心消化内科北京100036 解放军总医院第二医学中心保健一科北京100036

目的分析血清胃癌相关抗原7(MG7-Ag)水平、组织神经源位点缺口同源蛋白3(Notch-3)水平对胃癌的诊断价值。方法回顾性分析2023年1月至12月解放军总医院第二医学中心收治的23例胃癌患者(胃癌组)及50例胃部良性病变者(良性病变组)的临床资... 详细信息

目的分析血清胃癌相关抗原7(MG7-Ag)水平、组织神经源位点缺口同源蛋白3(Notch-3)水平对胃癌的诊断价值。方法回顾性分析2023年1月至12月解放军总医院第二医学中心收治的23例胃癌患者(胃癌组)及50例胃部良性病变者(良性病变组)的临床资料,统计2组患者的基线资料及血清MG7-Ag水平、组织Notch-3水平,分析胃癌的影响因素及血清MG7-Ag水平、组织Notch-3水平对胃癌的诊断效能;并比较不同胃癌患者的血清MG7-Ag水平、组织Notch-3水平,分析血清MG7-Ag水平、组织Notch-3水平与胃癌病理参数(肿瘤直径、TNM分期、血管浸润程度、淋巴结转移)的关系。结果胃癌组患者的血清胃蛋白酶原Ⅰ(PG1)水平低于良性病变组,胃泌素、癌胚抗原(CEA)、MG7-Ag及组织Notch-3水平均高于良性病变组(P3 cm、Ⅲ~Ⅳ级、有血管浸润及淋巴结转移的胃癌患者血清MG7-Ag水平、组织Notch-3水平高于直径≤3 cm、Ⅰ~Ⅱ级、无血管浸润及淋巴结转移者(P<0.05)。Pearson相关分析结果显示血清MG7-Ag水平、组织Notch-3水平与患者的肿瘤直径、TNM分期、血管浸润程度、淋巴结转移呈正相关关系(P<0.05)。结论胃癌患者的血清MG7-Ag水平、组织Notch-3水平均升高,其水平与肿瘤直径、TNM分期、血管浸润程度、淋巴结转移呈正相关关系,且两者联合对胃癌具有较高的诊断价值。

关键词：胃癌相关抗原7 神经源位点缺口同源蛋白3 癌胚抗原胃肿瘤诊断

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Petrogenesis and tectonic implications of the Early Cretaceous Dagushan adakitic porphyries in the Anshan area,North China Craton

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Acta Geochimica 2022年第1期41卷 24-38页

作者： Xiaohui Sun Haoshu Tang Yan luan Key laboratory of Western China’s Mineral Resources and Geological Engineering MOESchool of Earth Science and ResourcesChang’an UniversityXi'an 710054China State Key laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China

The eastern part of the North China Craton suffered significant lithospheric thinning since the Mesozoic,and petrogenesis of the Dagushan adakitic diorite porphyries provides an excellent opportunity to investigate the lithospheric thinning mechanism and geodynamic *** zircon la-ICP-MS U–Pb geochronology reveals that the representative Dagushan adakitic porphyry was formed at 120.5±0.5 *** Dagushan diorite porphyries are characterized by the relatively high contents of SiO_(2)(64.25–65.70 wt%),Al_(2) O_(3)(15.00–15.38 wt%),Sr(333–491 ppm),low contents of Y(6.50–10.3 ppm),and Yb(0.57–0.85 ppm),and resultant high Sr/Y(47–57)and la/Yb(37–55)ratios,exhibiting geochemical characteristics of typical ***,the relatively high Mg O contents(MgO=2.23–2.29 wt%)and Mg numbers(Mg^(#)-=54–56)of the Dagushan adakitic rocks imply that the pristine adakitic magma interacted with mantle ***,the zircon Hf isotopic signatures(εHf(t)=-19.0 to-28.0;TDM2=2378–2944 Ma)suggest an ancient lower crustal ***,it is proposed that the Dagushan adakitic rock was probably generated by partial melting of delaminated lower crust which was triggered by the Tan-Lu Fault Zone,and the interaction of pristine adakitic magma with mantle peridotite during the ascent finally generated the Dagushan high Mg^(#)adakitic *** is suggested that delamination was an important mechanism for lithospheric thinning of the NCC.

关键词： Diorite porphyry Adakite Lower crust Delamination NCC

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新辅助免疫联合治疗在局部晚期头颈部鳞状细胞癌的应用进展

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中华肿瘤防治杂志 2024年第15期31卷 968-974页

作者：马艺轩李晓娟靳晴纪鸾乔俏中国医科大学第二临床学院中国医科大学第一临床学院中国医科大学附属第一医院放疗科

目的总结新辅助免疫联合治疗方式在局部晚期头颈部鳞状细胞癌(la-HNSCC)中的最新研究成果与临床应用现状，为优化综合治疗方案、改善la-HNSCC患者的治疗效果和生活质量提供参考依据。方法以“头颈部肿瘤、鳞状细胞癌、新辅助治疗、免... 详细信息

目的总结新辅助免疫联合治疗方式在局部晚期头颈部鳞状细胞癌(la-HNSCC)中的最新研究成果与临床应用现状，为优化综合治疗方案、改善la-HNSCC患者的治疗效果和生活质量提供参考依据。方法以“头颈部肿瘤、鳞状细胞癌、新辅助治疗、免疫治疗、新辅助联合治疗、生物标志物、毒副反应”为中文关键词，以“head and neck neoplasm、squamous cell carcinoma、neoadjuvant therapy、Immunotherapy、neoadjuvant combination therapy、biomarkers、toxic and side effects”为英文关键词，检索PubMed数据库和维普数据库2010年10月-2023年8月发表的关于la-HNSCC新辅助免疫联合治疗方面的文献。纳入标准：(1)la-HNSCC;(2)新辅助联合免疫治疗。排除标准：(1)会议性、评论类等文献；(2)鼻咽癌相关的文献。共纳入47篇文献，其中中文文献5篇，英文文献42篇。结果基于新辅助免疫治疗的联合治疗有利于la-HNSCC患者实现病理缓解，3个周期后病理完全缓解(pCR)率为37.0%～100%,主要病理缓解(MPR)率为40%～100%。实现病理缓解的HNSCC患者较非病理缓解者的无病生存期和总生存期更长，且差异均有统计学意义。程序性死亡配体1(PD-L1)高表达和HPV相关HNSCC作用更为明显，PD-L1高表达者客观缓解率为68.2%～100%,HPV相关HNSCC患者pCR率和MPR率分别为90%和100%。从新辅助免疫联合治疗HNSCC的毒副作用来看，3～4级治疗相关不良事件偶见，未见治疗相关死亡病例，整体可控。结论新辅助免疫联合治疗la-HNSCC可有效提高肿瘤的客观反应率，且对PD-L1高表达及HPV相关HNSCC作用更为明显。然而新辅助免疫联合治疗对la-HNSCC长期生存的益处有待进一步研究。

关键词：头颈部肿瘤鳞状细胞癌新辅助治疗免疫治疗新辅助联合治疗生物标志物毒副作用综述文献

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玉树北部二叠纪镁铁质岩的成因及其对大陆弧后盆地形成的指示

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岩石矿物学杂志 2024年第2期43卷 344-359页

作者：刘彬蔡昊龙马昌前吴栾程琦李福林孙洋长江大学地球科学学院湖北武汉430100 中国地质大学地质过程与矿产资源国家重点实验室湖北武汉430074 中国地质大学地球科学学院湖北武汉430074 中国地质调查局武汉地质调查中心(中南地质科技创新中心) 湖北武汉430205

系统地调查与研究弧后盆地岩浆作用能为探究汇聚板块边缘的壳幔相互作用、板块俯冲动力学和弧后盆地形成-演化机制等提供重要信息。本文以最近在青海玉树北部地区发现的二叠纪镁铁质岩类为研究对象,开展了岩相学、锆石U-Pb年代学、岩石... 详细信息

系统地调查与研究弧后盆地岩浆作用能为探究汇聚板块边缘的壳幔相互作用、板块俯冲动力学和弧后盆地形成-演化机制等提供重要信息。本文以最近在青海玉树北部地区发现的二叠纪镁铁质岩类为研究对象,开展了岩相学、锆石U-Pb年代学、岩石地球化学与同位素地质学等研究,以期为深入认识大陆弧后盆地形成机制及有关镁铁质岩浆的起源提供关键线索。锆石la-ICP-MS U-Pb年代学测定结果表明,玉树北部辉长岩的结晶年龄为260±1 Ma。玄武岩样品具有相对低的TiO2和Nb/Y值以及相对高的Ce/Nb值,其相对于原始地幔要显著富集轻稀土和Th等元素,亏损Nb、Ta、Ti和P等元素,可与世界上典型弧后盆地玄武岩(例如Okinawa Trough BABBs)成分特征类比。而辉长岩样品具有相对高的TiO2和Nb/Y值以及相对低的Ce/Nb值,其相对于原始地幔要显著富集轻稀土和Th等元素,轻微亏损Nb、Ta和Ti,总体上具有与OIB类似的成分特征。玄武岩样品具有变化较大的ISr(0.706~0.709)和εNd(t)值(-1.8~+1.3),而辉长岩样品则具有相对均一的ISr(0.709)和εNd(t)值(-1.8~-1.5)。综合本次研究成果可以确定,玄武岩应该起源于一个受俯冲组分改造的岩石圈地幔,而辉长岩应该来自于一个与地幔柱相关的源区。结合区域最新研究资料可以进一步判断研究区镁铁质岩应该形成于大陆弧后盆地扩张的背景中,并且该弧后盆地的产生很可能与洋壳深俯冲导致的板块回撤、峨眉山地幔柱活动密切相关。

关键词：镁铁质岩大陆弧后盆地二叠纪北羌塘青藏高原

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峨眉大火成岩省攀西钒钛磁铁矿矿集区钴、镓、钪资源及综合利用潜力

引用

矿物岩石地球化学通报 2024年第1期43卷 218-231页

作者：宋谢炎佘宇伟栾燕何海龙张祺龙郑文勤中国科学院地球化学研究所矿床地球化学国家重点实验室贵阳550081 中国地质科学院地质研究所北京100037 长安大学地球科学与资源学院西安710054 云南大学地球科学学院昆明650091 成都理工大学地球科学学院成都610059

峨眉大火成岩省内带攀西地区的攀枝花、红格、白马、太和等矿床的钒钛磁铁矿矿石量约100亿t,V_(2)O_(5)储量1580万t、TiO_(2)储量8.7亿t,此外还蕴含着丰富的Co、Ga、Sc、Cr等十多种稀有金属。尽管自20世纪八九十年代V和Ti逐渐得到了利用... 详细信息

峨眉大火成岩省内带攀西地区的攀枝花、红格、白马、太和等矿床的钒钛磁铁矿矿石量约100亿t,V_(2)O_(5)储量1580万t、TiO_(2)储量8.7亿t,此外还蕴含着丰富的Co、Ga、Sc、Cr等十多种稀有金属。尽管自20世纪八九十年代V和Ti逐渐得到了利用,但是Co、Ga、Sc、Cr等元素尚未得到综合利用,这些矿床的尾矿中还有巨量的各种金属元素。本文对近年来获得的磁铁矿、钛铁矿、单斜辉石电子探针和激光等离子质谱原位分析数据进行了系统分析,发现Ga和Cr主要赋存在磁铁矿中,Co主要赋存在硫化物和磁铁矿中,Sc主要赋存在单斜辉石和钛铁矿中;而且不同岩体中的磁铁矿、钛铁矿和单斜辉石中各种元素的含量存在差异。这些分析为矿石、尾矿甚至某些岩石中这些元素的综合利用提供了重要信息。

关键词：钒钛磁铁矿钴镓钪峨眉大火成岩省

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