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Unveiling the mechanisms of Fe(Ⅲ)-loaded chitosan composite(CTS-Fe)in enhancing anaerobic digestion of waste activated sludge

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Journal of Environmental Sciences 2024年第4期138卷 200-211页

作者： Boaiqi Zhang Ziwen Zhao RuiMa Nan Chen Zhe Kong zhongfang Lei Zhenya Zhang Graduate School of Life and Environmental Sciences University of Tsukuba1-1-1 TennodaiTsukubaIbaraki 305-8572Japan The Key Laboratory of Water and Sediment Sciences Ministry of Education/State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems/College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China South China Institute of Environmental Sciences Ministry of Ecology and EnvironmentGuangzhou 510345China School of Water Resources and Environment China University of Geosciences(Beijing)Beijing 100083China School of Environmental Science and Engineering Suzhou University of Science and TechnologySuzhou 215009China

Anaerobic digestion(AD)of waste activated sludge(WAS)is usually limited by the low generation efficiency of ***(Ⅲ)-loaded chitosan composite(CTS-Fe)have been reported to effectively enhanced the digestion of WAS,but its role in promoting anaerobic sludge digestion remains *** present study,the effects of CTS-Fe on the hydrolysis and methanogenesis stages of WAS anaerobic digestion were *** addition of CTSFe increased methane production potential by 8%-23%under the tested conditions with the addition of 5-20 g/L ***,the results demonstrate that the addition of CTS-Fe could effectively promote the hydrolysis of WAS,evidenced by lower protein or polysaccharides concentration,higher soluble organic carbon in rector adding CTS-Fe,as well as the increased activity of extracellular hydrolase with higher CTS-Fe ***,the enrichment of Clostridia abundance(iron-reducing bacteria(IRBs))was observed in CTS-Fe adding reactor(8.9%-1..8%),which was higher than that in the control reactor(7.9%).The observation further suggesting the acceleration of hydrolysis through dissimilatory iron reduction(DIR)process,thus providing abundant substrates for ***,the presence of CTS-Fe was inhibited the acetoclastic and hydrogenotrophic methanogenesis process,which could be ascribed to the Fe(Ⅲ)act as electron acceptor coupled to methane for anaerobic ***,coenzyme F420 activity in the CTS-Fe added reactor was 34.9% lower than in the blank,also abundance of microorganisms involved in hydrogenotrophic methanogenesis was *** from this study could provide theoretical support for the practical applications of CTS-Fe.

关键词： Chitosan-Fe(Ⅲ)composite Methanogenesis Dissimilatory iron reduction Enzyme activity Microbial community structure

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Climate and Soil Geochemistry Influence the Soil Organic Carbon Content in Drylands of the Songliao Plain, Northeast China

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Acta Geologica Sinica(English Edition) 2024年第5期98卷 1394-1403页

作者： LIU Kai DAI Huimin SONG Yunhong LIANG Shuai YANG zhongfang School of Earth Sciences and Resources China University of Geosciences Key Laboratory of Black Soil Evolution and Ecological Effect Ministry of Natural Resources/Liaoning Province Shenyang Center of China Geological Survey Northeast Geological S&T Innovation Center of China Geological Survey

The understanding of the spatial distribution of soil organic carbon(SOC) and its influencing factors is crucial for comprehending the global carbon cycle. However, the impact of soil geochemical and climatic conditions on SOC remains limited, particularly in dryland farming areas. In this study, we aimed to enhance the understanding of the factors influencing the distribution of SOC in the drylands of the Songliao Plain, Northeast China. A dataset comprising 35,1.8 measured soil samples was used to map the SOC distribution in the region. Multiple linear regression(MLR) and random forest models(RFM) were employed to assess the importance of driving indicators for SOC. We also carried out partial correlation and path analyses to further investigate the relationship between climate and geochemistry. The SOC content in dryland soils of the Songliao Plain ranged from 0.05% to 1..63%, with a mean value of 1.47% ± 0.90%. There was a notable increasing trend in SOC content from the southwest to the northeast regions. The results of MLR and RFM revealed that temperature was the most critical factor, demonstrating a significant negative correlation with SOC content. Additionally, iron oxide was the most important soil geochemical indicator affecting SOC variability. Our research further suggested that climate may exert an indirect influence on SOC concentrations through its effect on geochemical properties of soil. These insights highlight the importance of considering both the direct and indirect impact of climate in predicting the SOC under future climate change.

关键词： climate change Northeast China soil geochemistry soil organic carbon

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Mo_(2)P Monolayer as a Superior Electrocatalyst for Urea Synthesis from Nitrogen and Carbon Dioxide Fixation:A Computational Study

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Energy & Environmental Materials 2024年第1期7卷 207-214页

作者： Dongxu Jiao Zhongxu Wang Yuejie Liu Qinghai Cai Jingxiang Zhao Carlos R.Cabrera zhongfang Chen College of Chemistry and Chemical Engineering and Key Laboratory of Photonic and Electronic Bandgap Materials Ministry of EducationHarbin Normal UniversityHarbin 150025China Modern Experiment Center Harbin Normal UniversityHarbin 150025China Heilongjiang Province Collaborative Innovation Center of Cold Region Ecological Safety Harbin 150025China Department of Chemistry and Biochemistry The University of Texas at El PasoEl Paso TX 79968USA Department of Chemistry University of Puerto RicoRio Piedras CampusSan JuanPuerto Rico 00931USA

Urea synthesis through the simultaneous electrocatalytic reduction of N_(2)and CO_(2)molecules under ambient conditions holds great promises as a sustainable alternative to its industrial production,in which the development of stable,highly efficient,and highly selective catalysts to boost the chemisorption,activation,and coupling of inert N_(2)and CO_(2)molecules remains rather ***,by means of density functional theory computations,we proposed a new class of two-dimensional nanomaterials,namely,transition-metal phosphide monolayers(TM_(2)P,TM=Ti,Fe,Zr,Mo,and W),as the potential electrocatalysts for urea *** results showed that these TM_(2)P materials exhibit outstanding stability and excellent metallic ***,the Mo_(2)P monolayer was screened out as the best catalyst for urea synthesis due to its small kinetic energy barrier(0.35 eV)for C-N coupling,low limiting potential(-0.39 V),and significant suppressing effects on the competing side *** outstanding catalytic activity of the Mo_(2)P monolayer can be ascribed to its optimal adsorption strength with the key^(*)NCON species due to its moderate positive charges on the Mo active *** findings not only propose a novel catalyst with high-efficiency and high-selectivity for urea production but also further widen the potential applications of metal phosphides in electrocatalysis.

关键词： C-N coupling density functional theory Mo_(2)P monolayer urea synthesis

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Enhanced bifunctional oxygen electrochemical catalytic performance using La-doped CoFe_(2)O_(4)spinel supported by 3D-G for Zn-air batteries

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Journal of Energy Chemistry 2024年第7期94卷 778-788页

作者： Yinggang Sun Tingwei Zhang Peng Sun Jigang Wang Wenjie Duan Yanqiong Zhuang Likai Wang zhongfang Li School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 255049ShandongChina

The preparation of bifunctional catalysts for oxygen reduction(ORR)and oxygen evolution(OER)is crucial for Zn-air ***,we report a La doped CoFe_(2)O_(4) spinel catalyst supported on threedimensional graphene(3D-G),where La can facilitate electron transfer from Co to Fe,leading to increased electron cloud density in Fe and improved catalytic *** redshift of the G peak in the Raman spectra indicates the interaction between theπbond of 3D-G and d orbitals in La_(0.2)CoFe_(1.8)O_(4).La_(0.2)CoFe_(1.8)/3D-G exhibits superior ORR performance(E_(1.2)=0.86 V ***)and OER performance(E_(j=1.)=1.55 V ***)to CoFe_(2)O_(4)/3D-G(E_(1.2)=0.831.V ***,E_(j=1.)=1.603 V ***).Furthermore,it demonstrates excellent bifunctional oxygen catalytic performance while maintaining high power density and stability in liquid zinc-air batteries(ZABs)and flexible ZABs(F-ZABs).This work presents a viable strategy for utilizing rare earth element doped spinels to enhance oxygen catalyst and ZABs performance.

关键词： Zn-air batteries Electrocatalysts La_(0.2)CoFe_(1.8)/3D-G Electron pump Bifunctional oxygen catalytic performance

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Trogocytosis of CAR molecule regulates CAR-T cell dysfunction and tumor antigen escape

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Signal Transduction and Targeted Therapy 2024年第1期9卷 326-337页

作者： You Zhai Yicong Du Guanzhang Li Mingchen Yu Huimin Hu Changqing Pan Di Wang zhongfang Shi Xu Yan Xuesong Li Tao Jiang Wei Zhang Department of Molecular Neuropathology Beijing Neurosurgical InstituteCapital Medical UniversityBeijingPR China Department of Neurosurgery Beijing Tiantan HospitalCapital Medical UniversityBeijingPR China Department of Urology Peking University First HospitalInstitute of UrologyPeking UniversityNational Urological Cancer CenterBeijingPR China Department of Pathophysiology Beijing Neurosurgical InstituteCapital Medical UniversityBeijingPR China China National Clinical Research Center for Neurological Diseases BeijingPR China Center of Brain Tumor Beijing Institute for Brain DisordersBeijingPR China Research Unit of Accurate Diagnosis Treatmentand Translational Medicine of Brain TumorsChinese Academy of Medical SciencesBeijingPR China Chinese Glioma Genome Atlas Network(CGGA)and Asian Glioma Genome Atlas Network(AGGA) BeijingPR China

Chimeric antigen receptor(CAR)T-cell therapy has demonstrated clinical response in treating both hematologic malignancies and solid *** instances of rapid tumor remissions have been observed in animal models and clinical trials,tumor relapses occur with multiple therapeutic resistance ***,while the mechanisms underlying the long-term therapeutic resistance are well-known,short-term adaptation remains less ***,more views shed light on short-term adaptation and hold that it provides an opportunity window for long-term *** this study,we explore a previously unreported mechanism in which tumor cells employ trogocytosis to acquire CAR molecules from CAR-T cells,a reversal of previously documented *** mechanism results in the depletion of CAR molecules and subsequent CAR-T cell dysfunction,also leading to short-term antigen loss and antigen *** type of intercellular communication is independent of CAR downstream signaling,CAR-T cell condition,target antigen,and tumor cell ***,it is mainly dependent on antigen density and CAR sensitivity,and is associated with tumor cell cholesterol *** mitigation of this trogocytosis-induced CAR molecule transfer can be achieved by adaptively administering CAR-T cells with antigen density-individualized CAR ***,our study reveals a dynamic process of CAR molecule transfer and refining the framework of clinical CAR-T therapy for solid tumors.

关键词： Together instance depletion

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Initial COVID-1. severity influenced by SARS-CoV-2-specific T cells imprints T-cell memory and inversely affects reinfection

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Signal Transduction and Targeted Therapy 2024年第6期9卷 2791-2803页

作者： Gang Yang Jinpeng Cao Jian Qin Xinyue Mei Shidong Deng Yingjiao Xia Jun Zhao Junxiang Wang Tao Luan Daxiang Chen Peiyu Huang Cheng Chen Xi Sun Qi Luo Jie Su Yunhui Zhang Nanshan Zhong zhongfang Wang The Affiliated Hospital of Kunming University of Science and Technology.Department of Respiratory and Critical Care Medicine The First People’s Hospital of Yunnan provinceKunmingYunnanChina Guangzhou National Laboratory BiolandGuangzhouGuangdongChina State Key Laboratory of Respiratory Disease&National Clinical Research Center for Respiratory Disease Guangzhou Institute of Respiratory Healththe First Affiliated Hospital of Guangzhou Medical UniversityGuangzhou Medical UniversityGuangzhouChina

The immunoprotective components control COVID-1. disease severity,as well as long-term adaptive immunity maintenance and subsequent reinfection risk discrepancies across initial COVID-1. severity,remain ***,we longitudinally analyzed SARS-CoV-2-specific immune effectors during the acute infection and convalescent phases of 1.5 patients with COVID-1. categorized by *** found that early and robust SARS-CoV-2-specific CD4^(+)and CD8^(+)T cell responses ameliorate disease progression and shortened hospital stay,while delayed and attenuated virus-specific CD8^(+)T cell responses are prominent severe COVID-1. *** antiviral antibody generation rather than titer level associates with severe ***,initial COVID-1. severity imprints the long-term maintenance of SARS-CoV-2-specific adaptive immunity,demonstrating that severe convalescents exhibited more sustained virus-specific antibodies and memory T cell responses compared to mild/moderate ***,initial COVID-1. severity inversely correlates with SARS-CoV-2 reinfection ***,our study unravels the complicated interaction between temporal characteristics of virus-specific T cell responses and COVID-1. severity to guide future SARS-CoV-2 wave management.

关键词： severity immunity infection

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Automated detection of myopic maculopathy from color fundus photographs using deep convolutional neural networks

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Eye and Vision 2024年第4期10卷 11-22页

作者： Jun Li Lilong Wang Yan Gao Qianqian Liang Lingzhi Chen Xiaolei Sun Huaqiang Yang zhongfang Zhao Lina Meng Shuyue Xue Qing Du zhichun Zhang Chuanfeng LV Haifeng Xu Zhen Guo Guotong Xie Lixin Xie Qingdao Eye Hospital of Shandong First Medical University 5 Yanerdao RoadQingdao 266071China State Key Laboratory Cultivation Base Shandong Provincial Key Laboratory of OphthalmologyShandong Eye InstituteShandong First Medical University&Shandong Academy of Medical SciencesQingdao 266071China Ping An Healthcare Technology 9F Building BPingAn IFCNo.1-3 Xinyuan South RoadBejing 100027China Shandong Eye Hospital of Shandong First Medical University Jinan 250021China Rongcheng Eye Hospital Weihai 264200China Hospital of PLA Navy Qingdao 266071China Qilu Hospital of Shandong University(Qingdao) Qingdao 266035China Ping An Healthcare and Technology Company Limited hanghai 200030China ping An International Smart City Technology Company Limited Shenzhen 518000China.

Background:Myopic maculopathy(MM)has become a major cause of visual impairment and blindness worldwide,especially in East Asian *** learning approaches such as deep convolutional neural networks(DCNN)have been successfully applied to identify some common retinal diseases and show great potential for the intelligent analysis of *** study aimed to build a reliable approach for automated detection of MM from retinal fundus images using DCNN ***:A dual-stream DCNN(DCNN-DS)model that perceives features from both original images and corresponding processed images by color histogram distribution optimization method was designed for classification of no MM,tessellated fundus(TF),and pathologic myopia(PM).A total of 36,51. gradable images from four hospitals were used for DCNN model development,and 1.,986 gradable images from the other two hospitals for external *** also compared the performance of the DCNN-DS model and four ophthalmologists on 3000 randomly sampledfundus ***:The DCNN-DS model achieved sensitivities of 93.3%and 91.0%,specificities of 99.6%and 98.7%,areas under the receiver operating characteristic curves(AUCs)of 0.998 and 0.994 for detecting PM,whereas sensitivities of 98.8%and 92.8%,specificities of 95.6%and 94.1.,AUCs of 0.986 and 0.970 for detecting TF in two external testing *** the sampled testing dataset,the sensitivities of four ophthalmologists ranged from 88.3%to 95.8%and 81.1.to 89.1.,and the specificities ranged from 95.9%to 99.2%and 77.8%to 97.3%for detecting PM and TF,***,the DCNN-DS model achieved sensitivities of 90.8%and 97.9%and specificities of 99.1.and 94.0%for detecting PMand T,***:The proposed DCNN-DS approach demonstrated reliable performance with high sensitivity,specificity,and AUC to classify different MM levels on fundus photographs sourced from *** can help identify MM automatically among the large myopic groups and show great potenti

关键词： Myopic maculopathy Tessellated fundus Pathologic myopia Deep convolutional neural network Color fundus image

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断层作用下季节性冻土区埋地输气管道安全性分析

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中国测试 2024年第1期50卷 160-165页

作者：郝润霞付中方内蒙古科技大学内蒙古包头014000 内蒙古科技大学土木工程学院内蒙古包头014000

季节性冻土区埋地输气管道在断层作用下的安全性受到诸多因素影响,为研究管道内天然气温度、管道埋置深度、管道内压、管道壁厚对埋地输气管道安全性的影响,借助有限元软件ABAQUS建立管土非线性相互接触模型模拟断层错动。分析可得,在... 详细信息

季节性冻土区埋地输气管道在断层作用下的安全性受到诸多因素影响,为研究管道内天然气温度、管道埋置深度、管道内压、管道壁厚对埋地输气管道安全性的影响,借助有限元软件ABAQUS建立管土非线性相互接触模型模拟断层错动。分析可得,在研究的数据范围内:埋地输气管道在断层作用下的最大应力出现在断层附近的管道上,虽然断层两侧管道均有应力集中,但是两侧应力集中分布范围与峰值大小并不相同;提高管道内天然气温度可以降低埋地输气管道在断层错动下的应力,降低埋地输气管道破坏的可能性;浅埋管道能够减小断层作用下埋地输气管道应力,降低埋地输气管道被破坏的可能性;埋地输气管道内压越高,管道应力随断层错动增长的越迅速,发生破坏的可能性越大;埋地输气管道壁越厚,管道应力随断层错动增长的越缓慢,发生破坏的可能性越小。

关键词：有限元断层埋地输气管道季节性冻土区

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镉锌稳定同位素地球化学及其在土壤等地质体中的危害与治理研究进展

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中国地质 2024年第3期51卷 833-864页

作者：曹瑞芹杨忠芳余涛中国地质大学(北京)地球科学与资源学院北京100083 中国地质大学(北京)数理学院北京100083

【研究目的】镉、锌既是重要的矿产资源,也是有害的重金属元素。随着多接收电感耦合等离子体质谱仪(MC-ICP-MS)的发展,镉、锌等非传统稳定同位素体系的建立与应用使镉、锌地球化学研究水平迈上新的高度,镉、锌同位素体系建立与应用成... 详细信息

【研究目的】镉、锌既是重要的矿产资源,也是有害的重金属元素。随着多接收电感耦合等离子体质谱仪(MC-ICP-MS)的发展,镉、锌等非传统稳定同位素体系的建立与应用使镉、锌地球化学研究水平迈上新的高度,镉、锌同位素体系建立与应用成为国际研究热点。【研究方法】本文通过查阅大量镉、锌同位素的相关文献,从镉、锌同位素的分析方法、分馏机制、自然界储库组成及应用领域进行了综述。【研究结果】(1.随着镉、锌同位素分析技术的不断改进,其同位素体系正在逐步建立;(2)地球各储库中的锌同位素组成已基本查明,镉同位素组成正处于数据积累阶段;(3)镉、锌同位素分馏机制主要包括吸附沉淀、生物作用、化学作用等,目前已逐渐被应用到指示行星分异、探明成矿机制、重建古环境、示踪污染源等多种领域中;(4)在解析重金属污染源时,多种同位素的联用有助于减小不确定性。【结论】在新型同位素分析仪器和技术的开发下,镉、锌同位素的研究拥有更大的发展空间。未来的研究重点主要包括对镉、锌同位素分馏机制、部分储库含量、应用领域进行完善。

关键词：土壤镉同位素锌同位素分析方法分馏机制同位素组成古环境重建同位素示踪修复技术环境地质调查工程

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拓展anti-MoS_(2)单层结构的疆域:稳定性和功能性的理论研究

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Science China Materials 2024年第4期67卷 1260-1272页

作者：李锋钰刘宇余林珂吕晓东金朋陈中方 School of Physical Science and Technology Inner Mongolia UniversityHohhot 010021China College of Physics and Electronic Information Inner Mongolia Normal UniversityHohhot 011517China School of Materials Science and Engineering Hebei University of TechnologyTianjin 300130China Department of Chemistry University of Puerto RicoRio Piedras CampusSan Juan PR 00931USA

受二维(2D)过渡金属硫族化合物(TMDs)独特结构和电子性质的启发,我们通过高通量第一性原理计算,筛选了稳定的具有anti-MoS_(2)结构(1.和2H相)的2D硫族化合物X_(2)T(X=过渡金属Sc-Hg和主族元素Li-Ba;T=S、Se和Te).在经过评估的396个候选... 详细信息

受二维(2D)过渡金属硫族化合物(TMDs)独特结构和电子性质的启发,我们通过高通量第一性原理计算,筛选了稳定的具有anti-MoS_(2)结构(1.和2H相)的2D硫族化合物X_(2)T(X=过渡金属Sc-Hg和主族元素Li-Ba;T=S、Se和Te).在经过评估的396个候选物中,超过50个X_(2)T(X=Sc,Fe,Y,Zr,Nb,Hf,Ta,IA元素Li-Fr,IIA元素Ca-Ra,N,In,T1.Te;T=S、Se或Te)单层材料在1./1.’或2H相中表现出优异的热力学、动力学、力学和热学稳定性.这些anti-MoS_(2)二维材料表现出多样的特性,可以是非磁性/磁性金属或非磁性/反铁磁性半导体,杨氏模量常超过MoS_(2),并可能具有负泊松比.基于过渡金属的单层容易被O_(2)氧化,其中一些表现出高N_(2)解离活性.氧/氮表面饱和可以抑制过渡金属磁性并增加材料的能带间隙.值得注意的是,在表面原子被氧饱和后,2H-Fe_(2)S单层仍能保持强大的反铁磁性.此外,基于过渡金属的X_(2)T薄片有望作为高效析氢反应的电催化剂.这项研究为二维材料领域增添了新成员,提供了多样的性质与功能,并拓宽了它们的潜在应用领域.

关键词：反铁磁性过渡金属硫族化合物磁性金属单层结构氧饱和负泊松比析氢反应杨氏模量

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