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Separation and recovery of iron and scandium from acid leach.ng solution of red mud using D201 resin

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Journal of Rare Earths 2020年第12期38卷 1322-1329页

作者： xuekai Zh.ng Kanggen Zhou Yehuizi Wu Qingyuan Lei Ch.ngh.ng Peng Wei Ch.n School of Metallurgy and Environment Central South UniversityChangsha 410083China

Red mud is a byproduct of alumina refining of bauxite ores,and is a significant source for extracting ***,a large amount of iron in red mud makes it difficult to recover scandium because Fe(III) and Sc(Ⅲ) have similar physicochemical *** this study,a new method was developed for selective separation of iron and scandium in acid leachate of red mud using D201 *** calculations indicate that the ferric species mainly exists as FeCl3 or FeCl4-at chloride concentration above 6.65 mol/L,while scandium still exists as SCl2+,making it possible to selectively separate iron fro m scandium through anion resin adso *** factors affecting the adso rption of iron and scandium such as chloride conce ntratio n,resin dosage,adso rption time,and temperature were evaluated in batch experiments,The Langmuir model was successfully applied to both iron and scandium adsorption,and the maximum adsorption capacities of iron and scandium are 147.06 and 0.95 mg/g,respectively,indicating a significant difference between iron and *** analysis further demonstrates that the iron is adsorbed onto D201 resin as FeCl4 anion.

关键词： Red mud Resource recovery Iron Scandium Ion exch.nge Rare earths

Organic manure input and straw cover improved the community structure of nitrogen cycle function microorganism driven by water erosion

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International Soil and Water Conservation Research 2022年第1期10卷 129-142页

作者： Yulong Shi Qingwen Zh.ng Xingren Liu xuekai Jing Ch.ng Shi Li Zh.ng Agricultural Clean Watershed Resewarch Group Institute of Environment and Sustainable Development in AgricultureChinese Academy of Agricultural SciencesBeijing100081China

Water erosion process induces differences to the nitrogen(n)functional microbial community structure,which is the driving force to key n processes at soil-water ***,how the soil n trans-formations associated with water erosion is affected by microorganisms,and how the microbial respond,are still *** objective of this study is to investigate the ch.nges of microbial diversity and community structure of the n-cycle function microorganisms as affected by water erosion under application of organic manure and straw *** the basis of iso-nitrogen substitution,four treatments were set up:1)only chemical fertilizer with.n 150 kg ha^(-1),P2O560 kg ha^(-1) and K2O 90 kg ha^(-1)(CK);the n was substituted 20%by 2)organic manure(OM);3)straw(SW);and 4)organic manure+straw(1:1)(OMSW).The results showed that applying organic manure and straw to sloping farmland can increase soil n contents,but reduce runoff depth,Kw,sediment yield and n loss,especially in the *** cover and straw+organic manure increased the diversity(Chao1)of nitrifier(AOB),and both diversity and uniformity(Sh.nnon)of denitrifier(nirK/S)were increased in the *** erosion control mea-sures reduced n-fixing bacteria diversity and increased their uniformity,and the combined application of organic manure and straw cover was a better erosion control measure th.n the single application of *** soil chemistry and erodibility were the main drives for the ch.nges of n-functional microbial community structure and the appearance of dominant bacteria with different organic materials.

关键词： Water erosion Soil erodibility Organic amendment nitrifier Denitrifier n-fixing bacteria

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景观格局汇水单元法与城区水量水质模拟研究

中国水利水电科学研究院学报（中英文） 2024年第2期22卷 195-209页

作者：李木子陈学凯刘晓波董飞任俊旭张玉林中国水利水电科学研究院流域水循环模拟与调控国家重点实验室北京100038 水利部京津冀水安全保障重点实验室北京100038 重庆三峡学院环境与化学工程学院重庆404020 中电建生态环境集团有限公司广东深圳518100

景观多样性有助于提高城市韧性,但其可能带来的透水斑块破碎化和廊道连通度的改变,会影响城区非点源污染的产生输移特性。传统对非点源污染的定量评估忽略了汇水单元内部景观格局(形状、比例和空间配置)对物质输移的影响,是导致模拟精... 详细信息

景观多样性有助于提高城市韧性,但其可能带来的透水斑块破碎化和廊道连通度的改变,会影响城区非点源污染的产生输移特性。传统对非点源污染的定量评估忽略了汇水单元内部景观格局(形状、比例和空间配置)对物质输移的影响,是导致模拟精度偏低的主要原因。针对这一问题,本研究结合遥感影像和城市景观格局分布特征,构建了基于景观格局的汇水单元划分方法(景观格局法)。采用SWMM模型,以巢湖一级支流十五里河为对象展开研究,结果表明:(1)基于实测数据进行验证,采用景观格局法模拟各项指标(水量、COD、TP和nh 3-n)的纳什效率系数(nSE)均大于0.7,结果可靠;(2)与传统方法(泰森多边形划分汇水单元)相比,水量模拟精度(以nSE计)提高8%,水质模拟精度提高6%;(3)与泰森多边形法相比,景观格局法计算的入河总水量和污染总负荷较低,且污染物浓度峰值滞后;(4)景观格局法通过改变汇水单元之间的水力联系,模拟出污染物冲刷减弱,初期雨水冲刷效应降低,且随着重现期的加大,降低初期雨水冲刷强度的效果越明显,表明一定程度上景观类型多样化有助于缓解瞬时高强度污染影响。本研究构建的方法充分考虑了城市斑块内部的景观格局分布特征和水力联系,可为城区面源污染输出控制提供新的评估手段。

关键词：城镇建成区景观格局模拟水量水质 SWMM

Transcriptomic Analysis of Pacific Oyster(Crassostrea gigas) Zygotes Under hypotonic Triploid Induction

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Journal of Ocean University of Ch.na 2021年第1期20卷 147-158页

作者： LI Yangch.n WAnG Zhaoping CUI Yuting MA Peizh.n Zh.nG xuekai FAn Chao Key Laboratory of Mariculture of Ministry of Education Ocean University of ChinaQingdao 266003China

Polyploid breeding is widely used in various marine species. Low salinity treatment is an effective method of inducing triploid of bivalve mollusks. In this study, RnA-seq was performed to determine genes and pathways involved in hyposaline adaption and cell division of Pacific oyster(Crassostrea gigas) zygotes, trying to better understand the possible molecular mech.nism of hypo-osmotic induction. A total of 26965 unigenes were generated in the de novo assembly of clean Illumina reads with an average length of 934 bp and n50 of 1721 bp. Of 3024 differentially expressed genes(DEGs), 2501 were up-regulated and 523 were downregulated. GO(Gene Ontology) annotation and KEGG(Kyoto Encyclopedia of Genes and Genomes) pathway analysis of these DEGs revealed that these DEGs participate a variety of biological processes including osmoregulation, cytoskeleton organization, cell survival and death, and substantially modulate cell proliferation and embryonic development. In summery, RnA-seq methodology was applied for the first time to demonstrate hypotonic-induced transcriptomic alteration in oyster zygotes. Our findings not only interpreted the relatively high mortality of induced larvae, but also provided a valuable reference for further investigations on the mech.nism of hyposaline induction, thus should aid to the application of low salinity in triploid induction in large scale aquaculture in future.

关键词： RnA-seq Crassostrea gigas zygote triploid induction low salinity

A combination extract of Rensh.n(Panax Ginseng),Yinyanghuo(herba Epimedii Brevicornus),Yuanzhi(Radix Palygalae) and Jianghuang(Rhizoma Curcumae Longae) decreases glycogen synthase kinase 3β expression in brain cortex of APPV717I transgenic mice

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Journal of Traditional Ch.nese Medicine 2013年第2期33卷 211-217页

作者： Jing Shi Jinzhou Tian xuekai Zh.ng Chuiyou Zeng Mingqing Wei Pengwen Wang Yongyan Wang Department of neurology Dongzhimen HospitalBeijing University of Chinese Medicine Clinical neuroscience Research Group The University of ManchesterHope HospitalStott LaneSalfordManchester M6 8HDUK Key Laboratory of Ch.nese Internal Medicine Ministry of EducationBeijing University of Chinese Medicine Institute of Clinical Medicine China Academy of Chinese Medical Sciences

OBJECTIVE： To investigate the neuroprotective mech.nism of combination extract of Rensh.n （Ponax Ginseng）, Yinyanghuo （herba Epimedii Brevi-comus）, Yuanzhi （Radix Palygalae） and Jianghuang （Rhizoma Curcumae Longae）（GEPT） in treating AI- zheimer＇s disease on the target of glycogen syn- thase kinase 3β（GSK-3β）. METhODS： Three-month-old APPV7171 transgenic mice were randomly divided into ten groups （n=12 per group） and intragastrically administrated vehi- cle or medicines： APP group was given 0.5% CMC, donepezil group was given donepezil （APP ＋ D group）（0.92 mg/kg-1. day-1）, and GEPT groups were given small dose of GEPT （APP＋Gs group）（0.075 g/ kg-1. day-1）, medium dose （APP＋Gm group）（0.15 g/ kg-1. day-1）, and large dose （APP＋GI group）（0.30 g/ kg-1. day-1） for 4 or 8 months, respectively. Three-month-old C57BL/6J mice as vehicle controls （n=12） were given 0.5% CMC for 4 or 8 months as well. The GSK-3β expression in the cortex of 7- and 11-month-old APPV7171 transgenic mice with and without GEPT or donepezil treatment and normal C57BL/6J mice were measured via Western blotting and Immunohistochemistry. RESULTS： Immunohistochemistry analysis showed significant increase of GSK-3β in the cerebral cortex of 7-month-old APP group （compare to control group P=0.003）, while the GSK-313 expression of donepezil or OEPT group were all significantly de-creased （Donepezil vs APP： P=0.041; GI vs APP： P=0.049, Gm vs APP： P=0.029, Gh vs APP： P=0.036）. Western blot analysis showed similar results. The densitometric measures of GSK-3β in APP mice in- creased significantly as compared with the control group （P=0.008）. And the GSK-3β expression indonepezil and GEPT groups were all decreased. There was significant difference between Gh group or donepezil group and the control group （P=0.05）. Similar findings were shown in the 11-month-old mice in each group, except for greater decrease of GSK-3β in the GEPT group. COnCLUSIOn： GEPT can effectively decrease the level of GSK-3β expression

关键词： Alzheimer disease Mice, transgenic Glycogen synthase kinase 3 Traditional Ch.neseMedicine Ch.nese medical formula

Research on corona discharge suppression of high-voltage direct-current transmission lines based on dielectric-film-covered conductor

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Plasma Science and Technology 2021年第2期23卷 64-75页

作者： Yuze JIAnG Qiying LI xuekai Zh.nG Diwen JIAnG Shiqiang LIU Bangfa PEnG Jie LI State Grid Sh.ndong Electric Power Research Institute Jinan 250003People's Republic of China State Grid Sh.ndong Electric Power Company Jinan 250001People's Republic of China State Grid Jinan Jiyang Power Supply Company Jiyang 251400People's Republic of China School of Electrical Engineering Dalian University of TechnologyDalian 116024People's Republic of China

Corona discharge suppression for high-voltage direct-current(hVDC)transmission lines at line terminals such as converter stations is a subject that requires *** this paper,a method based on a conductor covered with dielectric film is proposed and implemented through a bench-scale *** with the bare conductor,the corona discharge suppression effect of the dielectric-film-covered conductor under positive polarity is studied from the composite field strength and ion current density using a line-plate experimental *** influences of film thickness and film material on the corona discharge suppression effect are *** charge accumulation and dissipation characteristics of different film materials are also *** results show that the conductor covered with dielectric film has excellent ability to inhibit corona *** ground-level composite field strength of the conductor covered with dielectric film is lower th.n its nominal field strength,and its ion current density is at the nA m^(−2) *** corona threshold voltage can be promoted by increasing the film thickness,but the ability to inhibit corona discharge becomes *** larger the surface electric field strength,the more charge accumulated,but the faster the charge dissipation *** with polyvinyl chloride film,cross-linked polyethylene film has stronger charge accumulation ability and slower charge dissipation rate,which can better restrain the corona discharge of hVDC transmission lines.

关键词： high-voltage direct-current(hVDC)transmission lines corona discharge suppression dielectric-film-covered conductor composite field strength ion current density

三酰甘油-葡萄糖指数与70岁以上老年心房颤动合并早期肾功能不全的相关性

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延边大学医学学报 2024年第1期47卷 31-36页

作者：贺先乐栾学凯邓志丽柳美兰朴颖金雄杰延边大学附属医院心血管内科吉林延吉133000 延边大学附属医院急诊医学科吉林延吉133000

[目的]探讨三酰甘油-葡萄糖(TyG)指数与70岁以上老年心房颤动(AF)合并早期肾功能不全的相关性,旨在为临床上预防和治疗老年AF合并早期肾功能不全提供理论依据.[方法]收集2021年1月至2022年12月间接受住院治疗的170例70岁以上老年AF患者... 详细信息

[目的]探讨三酰甘油-葡萄糖(TyG)指数与70岁以上老年心房颤动(AF)合并早期肾功能不全的相关性,旨在为临床上预防和治疗老年AF合并早期肾功能不全提供理论依据.[方法]收集2021年1月至2022年12月间接受住院治疗的170例70岁以上老年AF患者临床资料,根据胱抑素C(Cys-C)指标分为早期肾功能不全组(Cys-C>0.95 mg/L,n=90)和肾功能正常组(Cys-C≤0.95 mg/L,n=80),计算中性粒细胞与淋巴细胞比值(nLR)和BMI.采用Spearman分析TyG指数与AF合并早期肾功能不全的相关性;利用二元Logistic回归分析观察TyG指数是否为影响AF合并早期肾功能不全的独立影响因素;采用受试者工作特征曲线(ROC)评价TyG指数对AF合并早期肾功能不全的预测价值.[结果]两组患者心功能不全情况、总胆固醇、低密度脂蛋白胆固醇和高密度脂蛋白胆固醇水平、nLR及TyG指数间差异均有统计学意义(PnLR、空腹血糖(FBG)、糖化血红蛋白、三酰甘油(TG)及血肌酐水平与AF合并早期肾功能不全呈正相关.校正后二元Logistic回归分析结果显示,Ty G指数和nLR是AF合并早期肾功能不全发生的独立危险因素(OR=15.966,95%CI:4.395~59.005,PnLR可预测AF合并早期肾功能不全的发生,ROC曲线下面积分别为0.809(95%CI:0.742~0.865,PnLR、FBG、糖化血红蛋白及TG水平与AF合并早期肾功能不全呈正相关;TyG指数、nLR是AF合并早期肾功能不全发生的独立危险因素;TyG指数、nLR可预测AF合并早期肾功能不全的发生,且TyG指数的预测价值更高.

关键词：三酰甘油-葡萄糖指数胱抑素C 胰岛素抵抗心房颤动慢性肾脏病

Kinetic study of key species and reactions of atmospheric pressure pulsed corona discharge in humid air

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Plasma Science and Technology 2022年第5期24卷 154-168页

作者： Yongkang PEnG Xiaoyue Ch.n Yeqiang DEnG Lei LAn haoyu Zh.n xuekai PEI Jiahao Ch.n Yukuan YUAn Xish.n WEn The School of Electrical Engineering and Automation Wuhan UniversityWuhan 430072People’s Republic of China

In this study, we examined the key particles and chemical reactions that substantially influence plasma characteristics. In summarizing the chemical reaction model for the discharge process of n_(2)–O_(2)–h_(2)O(g)mixed gases, 65 particle types and 673 chemical reactions were investigated. On this basis, a global model of atmospheric pressure humid air discharge plasma was developed, with a focus on the variation of charged particles densities and chemical reaction rates with time under the excitation of a 0–200 Td pulsed electric field. Particles with a density greater th.n 1% of the electron density were classified as key particles. For such particles, the top ranking generation or consumption reactions(i.e. where the sum of their rates was greater th.n 95% of the total rate of the generation or consumption reactions) were classified as key chemical reactions. On the basis of the key particles and reactions identified, a simplified global model was derived. A comparison of the global model with the simplified global model in terms of the model parameters, particle densities, reaction rates(with time), and calculation efficiencies demonstrated that both models can adequately identify the key particles and chemical reactions reflecting the chemical process of atmospheric pressure discharge plasma in humid air. Thus, by analyzing the key particles and chemical reaction pathways, the charge and substance transfer mech.nism of atmospheric pressure pulse discharge plasma in humid air was revealed, and the mech.nism underlying water vapor molecules’ influence on atmospheric pressure air discharge was elucidated.

关键词： atmospheric humid air key charged particles key chemical reactions reaction pathways

黄芪注射液对全麻下胃肠道手术老年患者术后认知功能、炎症因子和氧化应激的影响

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中国医师杂志 2020年第12期22卷 1774-1777页

作者：苏蒙王学凯杭州市中医院老年病科 310007

目的探讨全麻下胃肠道手术老年患者应用黄芪注射液后,其认知功能、炎症因子和氧化应激的变化方法前瞻性选取2018年6月至2020年6月杭州市中医院收治的行胃肠道手术的老年患者102例。按随机数字表法分为对照组和观察组,各51例,另根据是否... 详细信息

目的探讨全麻下胃肠道手术老年患者应用黄芪注射液后,其认知功能、炎症因子和氧化应激的变化方法前瞻性选取2018年6月至2020年6月杭州市中医院收治的行胃肠道手术的老年患者102例。按随机数字表法分为对照组和观察组,各51例,另根据是否合并2型糖尿病(DM)将观察组分为未合并DM组28例和合并DM组23例,对照组分为未合并DM组30例和合并DM组21例。所有患者均进行全麻手术,对照组围手术期应用安慰剂治疗,观察组围手术期应用黄芪注射液。记录手术前后简易精神状态量表(MMSE)评分,术后认知功能障碍(POCD)发生率。松测手术前后血清白细胞介素6(1L-6)、肿瘤坏死因子-α(TnF-α)、C-反应蛋白(CRP)水平和超氧化物歧化酶(SOD)、丙二醛(MDA)水平。结果术前两组合并DM及两组本合并DM患者MMSE评分比较,差异均无统计学意义(P>0.05)。术后1.7 d,观察组合并DM患者MMSE评分均高于对照组合并DM患者(P<0.05)。术后1.7d,观察组合并DM患者POCD发生率均低于对照组合并DM患者(P<0.05)。术后7 d,两组血清***-α.CRP水平均高于术前,且观察组均低于对照组(P<0.05),术后7d,两组SOD水平均低于术前,MDA水平均高于术前,且观察组SOD水平高于对照组,MDA水平低于对照组(P<0.05),结论全麻下胃肠道手术老年患者应用黄芪注射液可有效减少炎症因子外泌,降低氧化应激反应,且在合并DM的老年患者中具有一定的改善认知功能作用,可降低POCD发生风险。

关键词：麻醉,全身胃肠外科手术黄芪老年人认知