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Enhanced electrokinetic remediation of cadmium-contaminated natural clay using organophosphonates in comparison with EDTA

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Chinese Journal of Chemical Engineering 2018年第5期26卷 1152-1159页

作者： yingying Gu Albert T. yeung Hongjiang li Department of Environmental and Safety Engineering China University of Petroleum (East China) Qingdao 266580 China Department of Engineering The University of Hong Kong Pokfulam Road Hong Kong China Qingdao Water Group Co. ltd. Qingdao 266002 China College of Mining Civil Engineering Taiyuan University of Technology Taiyuan 030024 China

Soil contamination by metals is a worldwide environmental problem. Electrokinetic extraction is a promising technology for in-situ remediation of contaminated soils of low hydraulic permeability. However, the extraction of metals is usually hindered by the high buffer capacity of natural soils. Organophosphonates are strong metal chelates as ethylenediaminetetraacetic acid(EDTA) which has been widely studied in the enhancement of electrokinetic remediation. In this study, batch desorption experiments and bench-scale electrokinetic extraction experiments were carried out to study the effect of two organophosphonates, i.e.,(nitrilotrimethylene)triphosphonate(NTMP) &(ethylenedinitrilo)-tetramethylenephosphonate(EDTMP), on the extraction of cadmium from a natural clay in comparison with EDTA. Results of the batch desorption experiments showed that more than 75% of the sorbed cadmium could be dissolved into solution using 0.1 mol·l^(-1) organophosphonates or EDTA in the wide p H range of 1–11. Results of the electrokinetic extraction experiments showed that the cadmium spiked in the specimen migrated towards the anode with the enhancement of NTMP,EDTMP, and EDTA under a constant voltage gradient of approximately 1.0 V·cm-1. Although cadmium mobilization enhanced by EDTA was more efficient than that by the organophosphonates, accumulation of cadmium was observed in the vicinity of the anode. The average removal efficiencies of cadmium from the soil after approximately 5 days of electrokinetic extraction enhanced by 0.1 mol·l-1 NTMP(22.8%) and EDTMP(22.4%) were higher than that by 0.1 mol·l^(-1) EDTA(15.1%).

关键词： Electrochemistry Remediation Desorption Organophosphonate EDTA High buffer capacity

人表皮生长因子受体2(HER2)低表达和HER2过表达乳腺癌的鉴别：4种MRI扩散模型的比较研究

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国际医学放射学杂志 2024年第3期 379-380页

作者： C.Mao l.Hu W.Jiang y.Qiu Z.yang y.liu 余芸菲

摘要目的确定传统扩散加权成像（DWI）、连续时间随机游走（CTRW）、分数阶微积分（FROC）和拉伸指数模型（SEM）在识别乳腺癌的人表皮生长因子受体2(HER2)表达

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Satellite-enabled enviromics to enhance crop improvement

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Molecular Plant 2024年第6期17卷 848-866页

作者： Rafael T.Resende lee Hickey Cibele H.Amaral lucas l.Peixoto Gustavo E.Marcatti yunbi Xu Universidade Federal de Goia´s(UFG) Agronomy DepartmentPlant Breeding SectorGoiania(GO)74690-900Brazil TheCROP a Precision-Breeding Startup:EnviromicsPhenomicsand GenomicsNo Zip-codeOperating VirtuallyGoiania(GO)and Sete Lagoas(MG)Brazil Queensland Alliance for Agriculture and Food Innovation The University of QueenslandBrisbaneQLDAustralia Earth lab Cooperative Institute for Research in Environmental SciencesUniversity of Colorado BoulderBoulderCO 80303USA Environmental Data Science Innovation&Inclusion lab Cooperative Institute for Research in Environmental SciencesUniversity of Colorado BoulderBoulderCO 80303USA Universidade Federal de Sa˜o Joa˜o del-Rei Forest Engineering DepartmentCampus Sete LagoasSete Lagoas(MG)35701-970Brazil Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081China Peking University Institute of Advanced Agricultural Sciences WeifangShandong 261325China BGI Bioverse Shenzhen 518083China

Enviromics refers to the characterization of micro-and macroenvironments based on large-scale environmental *** providing genotypic recommendations with predictive extrapolation at a site-specific level,enviromics could inform plant breeding decisions across varying conditions and anticipate productivity in a changing ***-based integration of statistics,envirotyping(i.e.,determining environmental factors),and remote sensing could help unravel the complex interplay of genetics,environment,and *** support this goal,exhaustive envirotyping to generate precise environmental profiles would significantly improve predictions of genotype performance and genetic gain in ***,informatics management platforms aggregate diverse environmental datasets obtained using optical,thermal,radar,and light detection and ranging(liDAR)sensors that capture detailed information about vegetation,surface structure,and *** wealth of information,coupled with freely available climate data,fuels innovative enviromics *** enviromics holds immense potential for breeding,a few obstacles remain,such as the need for(1)integrative methodologies to systematically collect field data to scale and expand observations across the landscape with satellite data;(2)state-of-the-art AI models for data integration,simulation,and prediction;(3)cyberinfrastructure for processing big data across scales and providing seamless interfaces to deliver forecasts to stakeholders;and(4)collaboration and data sharing among farmers,breeders,physiologists,geoinformatics experts,and programmers across research *** these challenges is essential for leveraging the full potential of big data captured by satellites to transform 21st century agriculture and crop improvement through enviromics.

关键词： envirotyping precision breeding genotype-environment interactions remote sensing predictive models enviromic information

流域水力侵蚀碳汇效应对土壤碳流失的平衡作用

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中国科学：地球科学 2024年第6期54卷 2050-2064页

作者：王凌霞聂小东李嘉奇刘窑军王惠李雅喆李忠武湖南师范大学地理科学学院长沙410081 湖南师范大学交叉科学研究院洞庭湖流域生态环境变化与固碳增汇湖南省重点实验室长沙410081 湖南大学环境科学与工程学院环境生物与控制教育部重点实验室(湖南大学)长沙410082

明确土壤碳循环过程及其主控因素,是估算和提升土壤固碳能力的重要前提.本文在流域尺度上探究了水力侵蚀在土壤碳循环中扮演的“源汇”角色.通过耦合空间分布式泥沙输移模型与生物地球化学模型,提出了一种定量估算水力侵蚀驱动下土壤有... 详细信息

明确土壤碳循环过程及其主控因素,是估算和提升土壤固碳能力的重要前提.本文在流域尺度上探究了水力侵蚀在土壤碳循环中扮演的“源汇”角色.通过耦合空间分布式泥沙输移模型与生物地球化学模型,提出了一种定量估算水力侵蚀驱动下土壤有机碳横向迁移和垂向通量的方法.将该耦合模型应用于洞庭湖流域,结果表明:1980~2020年间洞庭湖流域年均土壤侵蚀量为1.33×10^(8)t,呈先减后增的趋势.水力侵蚀驱动下,仅有12%发生迁移的有机碳最终流入河流系统,其余均随泥沙在流域陆上沉积并被埋藏.水力侵蚀造成的土壤有机碳横向流失量在1980年为8.86×10^(11)g C, 2020年为1.50×10^(11)g C,减少了83%.侵蚀过程中由于沉积泥沙的埋藏作用和土壤碳的动态置换,土壤有机碳垂向通量呈现5.54×10^(11)g C a^(-1)的净碳汇. 40年间土壤有机碳横向流失量减少及侵蚀引起净碳汇量增加源于大规模生态恢复工程的实施和耕作方式的改良,其对于减少水土流失和提高土壤碳储量具有重要意义.本研究提出的耦合模型可在大空间尺度和长时间段内对侵蚀引起的土壤碳动态过程进行空间显式模拟,为预测未来气候和土地利用变化下土壤碳储量提供科学支撑.

关键词：水力侵蚀泥沙输移横向土壤碳流失陆地-大气CO_(2)通量洞庭湖流域

Promotion of structural plasticity in area V2 of visual cortex prevents against object recognition memory deficits in aging and Alzheimer's disease rodents

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Neural Regeneration Research 2024年第8期19卷 1835-1841页

作者： Irene Navarro-lobato Mariam Masmudi-Martín Manuel F.lópez-Aranda Juan F.lópez-Téllez Gloria Delgado Pablo Granados-Durán Celia Gaona-Romero Marta Carretero-Rey Sinforiano Posadas María E.Quiros-Ortega Zafar U.Khan laboratory of Neurobiology Centro de Investigaciones Médico Sanitarias(CIMES)University of MalagaMalagaSpain Department of Medicine Faculty of MedicineUniversity of MalagaMalagaSpain Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas(CIBERNED) Institute of Health Carlos IIIMadridSpain the Donders Institute for Brain Cognition and Behaviour Radboud UniversityNijmegenThe Netherlands the Brain Metastasis Group National Cancer Research Centre(CNIO)MadridSpain the Department of Neurobiology University of California-Los AngelesLos AngelesCAUSA

Memory deficit,which is often associated with aging and many psychiatric,neurological,and neurodegenerative diseases,has been a challenging issue for *** till now,all potential drug candidates have failed to produce satisfa ctory ***,in the search for a solution,we found that a treatment with the gene corresponding to the RGS14414protein in visual area V2,a brain area connected with brain circuits of the ventral stream and the medial temporal lobe,which is crucial for object recognition memory(ORM),can induce enhancement of *** this study,we demonstrated that the same treatment with RGS14414in visual area V2,which is relatively unaffected in neurodegenerative diseases such as Alzheimer s disease,produced longlasting enhancement of ORM in young animals and prevent ORM deficits in rodent models of aging and Alzheimer’s ***,we found that the prevention of memory deficits was mediated through the upregulation of neuronal arbo rization and spine density,as well as an increase in brain-derived neurotrophic factor(BDNF).A knockdown of BDNF gene in RGS14414-treated aging rats and Alzheimer s disease model mice caused complete loss in the upregulation of neuronal structural plasticity and in the prevention of ORM *** findings suggest that BDNF-mediated neuronal structural plasticity in area V2 is crucial in the prevention of memory deficits in RGS14414-treated rodent models of aging and Alzheimer’s ***,our findings of RGS14414gene-mediated activation of neuronal circuits in visual area V2 have therapeutic relevance in the treatment of memory deficits.

关键词： behavioral performance brain-derived neurotrophic factor cognitive dysfunction episodic memory memory circuit activation memory deficits memory enhancement object recognition memory prevention of memory loss regulator of G protein signaling

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火星探测:黄钾铁矾原地K-Ar定年

中国科学：地球科学 2024年第3期54卷 661-676页

作者：杨静郑德文武颖陈虹杨莉张斌中国地质科学院地质力学研究所自然资源部活动构造与地质安全重点实验室北京100081 中国地震局地质研究所地震动力学国家重点实验室北京100037 中国地质大学(北京)科学研究院北京100083 中国科学院地质与地球物理研究所中国科学院新生代地质与环境重点实验室北京100029

为了更好地确定火星不同地形所记录的气候变化的时间尺度,确定火星历史上重大事件的绝对年龄,并校准陨石坑率,需要从火星原地或从返回样品中获得精确的年龄数据.原地K-Ar定年是目前比样品返回更为实用的一种精确远程定年技术.黄钾铁矾(K... 详细信息

为了更好地确定火星不同地形所记录的气候变化的时间尺度,确定火星历史上重大事件的绝对年龄,并校准陨石坑率,需要从火星原地或从返回样品中获得精确的年龄数据.原地K-Ar定年是目前比样品返回更为实用的一种精确远程定年技术.黄钾铁矾(KFe_(3)(SO_(4))_(2)(OH)_(6)),是火星上广泛存在的唯一一种通过就位探测、轨道遥感探测、陨石研究三种手段都确定存在的含钾硫酸盐矿物,它已被用于K-Ar和^(40)Ar/^(39)Ar精确定年.火星上黄钾铁矾的保存提供了火星上含水过程的性质和持续时间的信息,不同年龄的黄钾铁矾能有效地解读火星历史上地表水流动时期及过渡到当前干旱气候之间的演变历史.本文总结了近年来火星上黄钾铁矾存在的区域、矿物学特征、在火星上的稳定性、原地K-Ar定年的研究现状、黄钾铁矾氩扩散动力学等,探讨了黄钾铁矾原地K-Ar定年的关键科学问题、火星采样返回需求、未来研究方向等.

关键词：火星黄钾铁矾原地K-Ar定年氩扩散稳定性

Exact solution of the one-dimensional Klein-Gordon equation with scalar and vector linear potentials in the presence of a minimal length

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Chinese Physics B 2010年第2期19卷 43-47页

作者： y Chargui l Chetouani A Trabelsi Unit de Recherche de Physique Nuclaire et des Hautes Energies Facult des Sciences de Tunis Dpartement de Physique Thorique Institut de PhysiqueUniversit de ConstantineRoute Ain El BeyConstantineAlgeria Centre National des Sciences et Technologies Nuclaires Technopole de Sidi-Thabet 2020Tunisia

Using the momentum space representation, we solve the Klein--Gordon equation in one spatial dimension for the case of mixed scalar and vector linear potentials in the context of deformed quantum mechanics characterized by a finite minimal uncertainty in position. The expressions of bound state energies and the associated wave functions are exactly obtained.

关键词： Klein--Gordon equation linear potential minimal length exact solution

青藏高原及其周边石炭纪综合地层、生物群与古地理演化

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中国科学：地球科学 2024年第4期54卷 1091-1124页

作者：胡科毅王向东王文琦宋英凡叶训焱李璐史宇坤杨孙容李莹南京大学地球科学与工程学院内生金属矿床成矿机制研究国家重点实验室关键地球物质循环前沿科学中心南京210023

石炭纪时青藏高原及其周边分处不同的古地理位置,具有不同的沉积和生物类型.系统梳理和总结青藏高原的石炭系及生物群,建立综合地层对比框架,恢复古地理,对正确理解晚古生代冈瓦纳大陆的裂解、古特提斯洋的演变都具有重要意义.青藏高原... 详细信息

石炭纪时青藏高原及其周边分处不同的古地理位置,具有不同的沉积和生物类型.系统梳理和总结青藏高原的石炭系及生物群,建立综合地层对比框架,恢复古地理,对正确理解晚古生代冈瓦纳大陆的裂解、古特提斯洋的演变都具有重要意义.青藏高原及其周边的石炭系可划分为三种类型:冈瓦纳型、基默里型和特提斯型.本文讨论的冈瓦纳型包括藏南区的北喜马拉雅分区、康马-隆子分区和札达-仲巴分区,以及印度-巴基斯坦北部,仅发育密西西比亚系,生物类群为冈瓦纳型.基默里型包括保山分区、腾冲分区、措勤-申扎分区、拉萨-察隅分区、那曲-比如分区、南羌塘分区,以及掸泰和南阿富汗-帕米尔等地区,也仅发育密西西比亚系,但生物群具有欧洲、华南、澳大利亚和北美混生型特征.特提斯型包括唐古拉山分区、可可西里-巴彦喀拉分区、昌都-横断山分区、铁克里克分区、西昆仑分区、喀喇昆仑分区、东昆仑-中秦岭分区和祁连分区,石炭系发育完整,生物群为暖水的特提斯型.冈瓦纳型和基默里型石炭系生物地层对比以牙形类为主,辅以腕足类和四射珊瑚;特提斯型密西西比亚系的生物地层以四射珊瑚和腕足类为主,宾夕法尼亚亚系以有孔虫(?)和牙形类为主,辅以四射珊瑚和腕足类.在石炭纪国际标准年代地层框架下,系统建立了青藏高原及其周边的岩石地层和生物地层划分和对比框架.将来应加强石炭纪同位素地质年代学、地球化学及古气候和古环境的研究.

关键词：青藏高原石炭纪岩石地层生物群地层对比

Evaluation of the nutritional value of Artemia nauplii for European seabass(Dicentrarchus labrax l.)larvae

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Aquaculture and Fisheries 2024年第1期9卷 78-84页

作者： Alaa A.El-Dahhar Rashwan S.Rashwan Samy y.El-Zaeem Shaimaa A.Shahin Mona M.Mourad Mohammed F.El Basuini Animal and Fish Production Department Faculty of Agriculture-Saba BashaAlexandria UniversityAlexandria21526Egypt National Institute of Oceanography and Fisheries(NIOF) Cairo11562Egypt Department of Animal Production Faculty of AgricultureTanta UniversityTanta31527Egypt Faculty of Desert Agriculture King Salman International UniversitySouth Sinai46618Egypt

Adapted European seabass(Dicentrarchus labrax l.)larvae at 25 days post-hatching(dph)with a primary weight and length of 23 mg and 9.92 mm,start the weaning up to 46 dph using the weaning micro-diet(54%crude protein from fish meal,powder milk,and poultry egg)concurrently with Artemia enriched with fortification emulsions(0.6 g/l)of DHA selco®as a control group(DHAS)or Fish oil+20%Vitamin C(FOVC),or Fish oil+20%Vitamin E(FOVE),or Fish oil+10%Vit.C+10%Vit.E(FOCE),or Fish oil only(FO).At 46 dph,groups of larvae fed enriched Artemia with DHAS and FOVE exhibited the highest final body weight,weight gain,average daily gain,specific growth rate,feed intake,protein efficiency ratio,and survival%as well as the lowest feed conversion ***,larvae in FOVC displayed the lowest final body weight,total length,weight gain,average daily gain,specific growth rate,feed intake,protein efficiency ratio,and survival%as well as the highest feed conversion *** histological assessment exhibited no pathological alteration as well as an improvement in the structure with DHAS,FOVE,FOVC,and FOCE co-additives compared to *** peroxidase enzyme(GPx)recorded the highest rates(Plemented with DHAS and FOVE followed by FOCE and *** the lowest record for GPx activity was noted in the FO *** conclusion,Using augmented Artemia nauplii with fish oil+vitamin E in single or in companion with vitamin C as cheap antioxidants support *** larval growth,survival,and antioxidant efficacy during the critical weaning period.

关键词： European seabass Gastrointestinal histology Antioxidants Vitamin C Vitamin E DHA