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Low-temperature selective catalytic reduction of NO_(x) with NH_(3) over zeolite catalysts:A review

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Chinese Chemical Letters 2020年第10期31卷 2549-2555页

作者： Yijuan Pu Xinyu Xie Wenju jiang Lin Yang xia jiang Lu Yao College of Architecture and Environment Sichuan UniversityChengdu 610065China National Engineering Research Center for Flue Gas Desulfurization Sichuan UniversityChengdu 610065China

The selective catalytic reduction(SCR)of NO_(x) by NH3 is one of the most mature technologies for NO_(x) *** are the main factors affecting denitrification *** as low-tempe rature NH3-SCR catalysts have been extensively studied in the past few *** this work,the mechanism of zeolites for NH3-SCR reaction was reviewed and the denitrification performances of zeolite catalysts prepared by different methods were *** effects of sulfur and water poisoning on zeolite catalysts in NH3-SCR reaction were also *** ways to address the problems in lowtemperature NH3-SCR reaction were ***,this review could provide a fundamental understanding of SCR reaction on zeolite catalysts and pave the way toward similar studies to realize its commercial applications.

关键词： Selective catalytic reduction NO_x Zeolite Catalyst SO_(2)and H_(2)O resistance

Androgen receptor signaling in hepatocellular carcinoma and pancreatic cancers

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World Journal of Gastroenterology 2014年第28期20卷 9229-9236页

作者： Tatsuo Kanda xia jiang Osamu Yokosuka Department of Gastroenterology and Nephrology Chiba UniversityGraduate School of Medicine

Hepatocellular carcinoma (HCC) and pancreatic cancer remain difficult to treat, and despite the ongoing development of new treatments, the overall survival rate has only modestly improved over the past decade. Liver and pancreatic progenitors commonly develop from endoderm cells in the embryonic foregut. A previous study showed that HCC and pancreatic cancer cell lines variably express androgen receptor (AR), and these cancers and the surrounding tissues also express AR. AR is a ligand-dependent transcription factor that belongs to the nuclear receptor superfamily. Androgen response element is present in regulatory elements on the AR-responsive target genes, such as transforming growth factor beta-1 (TGF beta-1) and vascular endothelial growth factor (VEGF). It is well known that the activation of AR is associated with human carcinogenesis in prostate cancer as well as HCC and pancreatic cancer and that GRP78, TGF beta, and VEGF all play important roles in carcinogenesis and cancer development in these cancers. HCC is a male-dominant cancer irrespective of its etiology. Previous work has reported that vertebrae forkhead box A 1/2 are involved in estrogen receptors and/or AR signaling pathways, which may contribute to the gender differences observed with HCC. Our recent work also showed that AR has a critical role in pancreatic cancer development, despite pancreatic cancer not being a male dominant cancer. Aryl hydrocarbon (or dioxin) receptor is also involved in both HCC and pancreatic cancer through the formation of complex with AR. It is possible that AR might be involved in their carcinogenesis through major histocompatibility complex class I chain-related gene A/B. This review article describes AR and its role in HCC and pancreatic cancer and suggests that more specific AR signaling-inhibitors may be useful in the treatment of these “difficult to treat” cancers.

关键词： Androgen receptor Gender difference Hepatocellular carcinoma Male-dominant Pancreas

基于卫星遥感的宜宾市NO_(2)时空分布研究

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地球与环境 2024年第2期52卷 176-187页

作者：朱瑢昕米潭赵贤杰蒋霞江水苹李文秀周书华杨复沫詹宇四川大学建筑与环境学院宜宾市生态环境局宜宾市环境监测中心站

准确掌控区域二氧化氮(NO_(2))浓度时空分布,对于区域NO_(2)污染防控措施的制定具有重要意义。空气质量监测站点的稀疏且空间分布不均为计算全面域的NO_(2)带来了较大挑战,尤其对于监测站点数量较少的城市。为全面把控四川省宜宾市近年... 详细信息

准确掌控区域二氧化氮(NO_(2))浓度时空分布,对于区域NO_(2)污染防控措施的制定具有重要意义。空气质量监测站点的稀疏且空间分布不均为计算全面域的NO_(2)带来了较大挑战,尤其对于监测站点数量较少的城市。为全面把控四川省宜宾市近年来NO_(2)时空变化特征,研究使用TROPOMI卫星遥感数据,采用基于机器学习的多重插补链式方程(MICE)克服原始观测数据稀疏不均的问题,重构了2019~2021年宜宾市1 km网格NO_(2)小时浓度。基于站点的留出法验证中R2和RMSE分别为0.67和8.4μg/m^(3)。宜宾市2019~2021年各年的人口加权NO_(2)浓度([NO_(2)]pw)分别为19.1±5.5、14.9±5.3和14.8±6.2μg/m^(3)。多年的季均[NO_(2)]pw在冬季最高,其次依次为秋季、春季及夏季。NO_(2)浓度在8:00~10:00和18:00~23:00点呈现出上升趋势,一般夜间NO_(2)污染比白天更严重。翠屏区主城区是宜宾市最主要的NO_(2)污染区域,岷江及长江流域的NO_(2)浓度也较高。在2020年应对COVID-19的全面封控期间,宜宾NO_(2)浓度大幅度降低,[NO_(2)]pw相比2019年降低了约25%。精确的高分辨率NO_(2)时空分布结果可为当地减排策略的制定提供时量化的数据支撑。

关键词：二氧化氮卫星遥感机器学习时空分布宜宾市

国人解剖型后踝锁定钢板的设计、研发及生物力学分析

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中华骨科杂志 2024年第10期44卷 692-699页

作者：李勇奇廖燚夏江李兵周海超赵有光杨云峰上海市同济医院骨科上海200065 新疆维吾尔自治区人民医院克拉玛依医院(克拉玛依市中心医院)骨科克拉玛依834000 上海交通大学医学院附属瑞金医院骨科

目的设计、研发国人解剖型后踝锁定钢板,测量并分析其生物力学特性。方法收集上海市同济医院2022年6月至2023年5月招募的100名健康志愿者的胫腓骨+踝关节CT数据。对胫腓骨及踝关节三维重建,测量国人后踝影像解剖学参数,设计生产国人解... 详细信息

目的设计、研发国人解剖型后踝锁定钢板,测量并分析其生物力学特性。方法收集上海市同济医院2022年6月至2023年5月招募的100名健康志愿者的胫腓骨+踝关节CT数据。对胫腓骨及踝关节三维重建,测量国人后踝影像解剖学参数,设计生产国人解剖型后踝锁定钢板。通过制作胫骨人工骨模型,对钢板进行验证和生物力学测试。生物力学测试方法为分别在康定胫骨远端后侧钢板、六孔型后踝解剖锁定钢板、五孔型后踝解剖锁定钢板固定下:测量轴向施加载荷500、1000和1500 N的垂直位移;测量位移为2 mm时的失效载荷及内固定完全失效时的最大失效载荷。结果影像解剖学测量示后踝宽度为26.6(19.4,35.0)mm,并分别以第一四分位数、中位数和第三四分位数对应小、中、大三种型号后踝基础钢板;置钉安全区高度为5.5(5.3,5.7)mm;后翻角度为153.0°(148.5°,157.5°);后翻高度为20.0(19.7,20.9)mm。利用胫腓骨+踝关节螺旋CT及计算机辅助技术设计、生产后踝解剖锁定钢板,与胫骨后踝匹配良好,解剖贴服。生物力学测试:相较康定胫骨远端后侧钢板轴向载荷500、1000和1500 N时垂直位移的(0.60±0.02)、(2.22±0.03)、(2.81±0.04)mm,六孔型和五孔型后踝解剖锁定钢板分别减少为(0.45±0.04)、(1.10±0.03)、(1.50±0.03)mm和(0.52±0.04)、(1.15±0.03)、(1.67±0.03)mm,差异有统计学意义(F=88.287,P<0.001;F=10061.890,P<0.001;F=9774.019,P<0.001);三种固定方式下,后踝骨折位移为2 mm时的失效载荷分别为0.80(0.73,0.80)、2.00(1.93,2.00)、1.70(1.70,1.70)kN,差异有统计学意义(H=54.245,P<0.001);三种固定方式下,内固定完全失效的最大失效载荷分别为1.90(1.90,1.98)、4.30(4.30,4.30)、3.70(3.63,3.70)kN,差异有统计学意义(H=53.863,P<0.01)。结论国人解剖型后踝锁定钢板与后踝匹配良好,力学强度高、稳定性好。

关键词：踝骨折模型,解剖学内固定器计算机辅助设计生物力学现象

The adsorption of acidic gaseous pollutants on metal and nonmetallic surface studied by first-principles calculation: A review

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Chinese Chemical Letters 2019年第12期30卷 2123-2131页

作者： Xue Ye Shenggui Ma xia jiang Zhishan Yang Wenju jiang Hualin Wang College of Architecture and Environment Sichuan UniversityChengdu 610065China National Engineering Research Center for Flue Gas Desulfurization Sichuan UniversityChengdu 610065China

The acidic gases such as SO2,NOx,H2 S and CO2 are typical harmful pollutants and greenhouse gases in the atmosphere,which are also the main sources of *** most widely used method of treating these gas molecules is to capture them with different adsorption materials,i.e.,metal and nonmetallic materials such as MnO2,MoS2 and carbon-based *** doping transition metal atoms in adsorption materials are beneficial to the gas adsorption *** first-principles calculation is a powerful tool for studying the adsorption properties of contaminant molecules on different materials at the molecular and atomic levels to understand surface adsorption reactions,adsorption reactivity,and structureactivity relationships which can provide theoretical guidance for laboratory researches and industrial *** review introduces the adsorption models and surface properties of these gas molecules on metal and nonmetallic surfaces by first-principles calculation in recent *** purpose of this review is to provide the theoretical guidance for experimental research and industrial application,and to inspire scientists to benefit from first-principles calculation for applying similar methods in future work.

关键词： Acidic gases Adsorption Metals Carbon-based materials DFT

Initial identification of heavy metals contamination in Taihu Lake, a eutrophic lake in China

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Journal of Environmental Sciences 2012年第9期24卷 1539-1548页

作者： xia jiang Wenwen Wang Shuhang Wang Bo Zhang Jiachen Hu Key Laboratory of Environmental Protection of Lake Pollution Control Chinese Research Academy of Environmental Science Beijing 100012 China School of Forestry Northeast Forestry University Harbin 150040 China

A detailed investigation of seven heavy metals （Cu, Cd, Cr, As, Pb, Zn, Ni） in the water column, interstitial water and surface sediment was conducted to quantify the extent of their contamination in Taihu Lake. Results showed the average total concentrations ranged from 0.93μg/L for Cd to 47.03 μg/L for Zn. The dissolved concentrations in the overlying water ranged from 0.06μg/L for Cd to 15.86 μg/L for Zn. The metals in the Taihu Lake surface water were primarily in the particulate phase, especially for Cd, whose particulate concentration represented 94.3% of the total. In the surface sediment, the mean concentrations for Cr, Ni, Cu, Zn, As, Cd and Pb were 41.50, 28.72, 27.82, 65.46, 5.94, 0.82 and 41.17 mg/kg, respectively. The metals in the water column and sediments of Taihu Lake displayed significant spatial variations, and the higher metal concentrations mainly occurred in the north and west of Taihu Lake, especially in Zhushan Bay and West Taihu Lake. A quality assessment indicated that most of the metals in the surface water of Taihu Lake had no or low adverse health effects on organisms, except for Pb and Cu, which may cause chronic toxicity. Compared with the ＂Consensus-Based Sediment Quality Guidelines＂, the polluting metals were Cr, Ni and Cd, and the polluted regions were confined to Zhnshan Bay, Meiliang Bay and the west of Taihu Lake, especially for north of Zhushan Bay. The polluted areas for Cr, Ni and Cd were 14.36, 34.70 and 13.24 km2, respectively. We suggest that Cr, Ni, and Cd in the polluted areas should be addressed and that tissue chemistry and sediment toxicity assessments be performed as soon as possible.

关键词： Taihu Lake water sediment heavy metal assessment

CO_(2)捕集过程中气液传质强化研究进展

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石油炼制与化工 2024年第2期55卷 64-74页

作者：申强杨峥豪张香港段孝旭马良江霞常玉龙四川大学机械工程学院成都610065 四川大学碳中和未来技术学院天府永兴实验室

CO_(2)捕集是实现碳中和的托底性技术。化学吸收法是最具商业化潜力的技术之一,而吸收过程中气液传质强化是影响CO_(2)捕集效率、能耗和成本的重要因素。针对新的气液传质强化模式,从微流体强化、引入额外能量场、引入第二相介质和微界... 详细信息

CO_(2)捕集是实现碳中和的托底性技术。化学吸收法是最具商业化潜力的技术之一,而吸收过程中气液传质强化是影响CO_(2)捕集效率、能耗和成本的重要因素。针对新的气液传质强化模式,从微流体强化、引入额外能量场、引入第二相介质和微界面振荡技术全面总结和回顾了近年来的强化CO_(2)吸收手段和研究现状,重点关注微界面振荡技术的原理和研究方法,考察了不同强化手段的优劣势,为推动碳捕集过程中气液传质强化发展提供参考。

关键词：传质 CO_(2)捕集过程强化微界面振荡

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内部气氛含量分析环境下本底材料放气率研究

电子元件与材料 2024年第5期43卷 625-630页

作者：罗捷邱宝军张烨蔡宇宏夏江周帅陈海鑫工业和信息化部电子第五研究所广东广州510610 兰州空间技术物理研究所甘肃兰州730000

气密封装器件的内部气氛含量分析中,设备本底材料放气率是影响分析准确性的重要因素。采用静态升压法,对5种真空设备主要材料在3种典型温度和抽气时间下的放气率进行了深入研究。研究表明,相同条件下304不锈钢、430不锈钢和钛材料的放... 详细信息

气密封装器件的内部气氛含量分析中,设备本底材料放气率是影响分析准确性的重要因素。采用静态升压法,对5种真空设备主要材料在3种典型温度和抽气时间下的放气率进行了深入研究。研究表明,相同条件下304不锈钢、430不锈钢和钛材料的放气率均低于碳素钢和高纯铝,且同种材料在高温环境下的放气率随测试时间增加而增大。最后,基于材料成型等因素,建议选用304不锈钢和430不锈钢作为内部气氛含量分析的腔体环境使用材料,并给出了有效降低本底放气率的措施。

关键词：内部气氛含量放气率气密封装器件静态升压法

Sulfur resource recovery based on electrolytic manganese residue calcination and manganese oxide ore desulfurization for the clean production of electrolytic manganese

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Chinese Journal of Chemical Engineering 2020年第3期28卷 864-870页

作者： Dong Sun Lin Yang Ning Liu Wenju jiang xia jiang Jianjun Li Zhengyou Yang Zhengping Song College of Architecture and Environment Sichuan UniversityChengdu 610065China National Engineering Research Center for Flue Gas Desulfurization Sichuan UniversityChengdu 610065China Ningxia Tianyuan Manganese Industry Group Co.Ltd Zhongwei 755103China

An environmentally friendly and resource-conserving route to the clean production of electrolytic manganese was developed,in which the electrolytic manganese residue(EMR)was initially calcined for cement buffering;then the generated SO2-containing flue gas was managed using manganese oxide ore and anolyte(MOOA)desulfurization;at last,the desulfurized slurry was introduced to the electrolytic manganese production(EMP).Results showed that 4.0 wt%coke addition reduced the sulfur of calcined EMR to 0.9%,thereby satisfying the cement-buffer ***-scale desulfurization showed that about 7.5 vol%of high SO2 containing flue gas can be cleaned to less than 0.1 vol%through a five-stage countercurrent MOOA *** desulfurized slurry had 42.44 g·L-Mn2+and 1.92 g·L-1 S2 O62-,which was suitable for electrowinning after purification,and the purity of manganese product was 99.93%,satisfy the National Standard of China YB/*** new integrated technology fulfilled 99.7%of sulfur reutilization from the EMR and 94.1%was effectively used to the *** MOOA desulfurization linked the EMP a closed cycle without any pollutant discharge,which promoted the cleaner production of EMP industry.

关键词： Electrolytic manganese residue Manganese oxide ore desulfurization Sulfur recycling Cleaner production