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Pool bio-oxidation and fitting analysis of low-grade arsenic-containing refractory gold ore

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Green Chemical Engineering 2024年第4期5卷 511-518页

作者： Jiafeng li linlin Tong Haijun Zhang Qiao Chen Hongying Yang lingling Shen Yiqin zhai Rongfan Yao School of Mines China University of Mining and Technology School of Metallurgy Northeastern University School of Chemical Engineering Technology China University of Mining and Technology School of Materials Science and Engineering Lanzhou University of Technology School of Intelligent Manufacturing Jiangsu Vocational Institute of Architectural Technology

To overcome the limitations of geography, climate, and ore characteristics on the ore beneficiation process, biooxidation studies on low-grade arsenic-bearing refractory gold ore by pool leaching were carried out, as well as process fitting analysis. The gold particles are encapsulated by pyrite and arsenopyrite. After 60 days of biooxidation, the oxidation rates of arsenic, sulfur, and gold were 39%～69%, 24%～41%, and 49%～83%, respectively. The inoculated Acidithiobacillus ferrooxidans, Ferroplasma acidiphilum, and Leptospirillum ferrodiazotrophum could all mediate the initial pyrite/arsenopyrite oxidation and the Fe2+oxidation reaction, but only the former could mediate the subsequent sulfur compound oxidation. When compared to daily bacterial circulation and bacterial replacement every ten days, aeration improved the gold leaching rate by 14%～22%. The Boltzmann model could fit both the arsenic and sulfur bio-oxidation, with model fit variances greater than 0.98. Based on the experimental and fitting results, the bio-oxidation cycle was determined to be 60 days, and the bio-oxidation mechanisms are summarized. This study has significant practical implications for the rational utilization of gold resources and provides theoretical and practical guidance for similar gold ores.

关键词： Refractory gold ore Bio-oxidation Pool leaching Boltzmann model

Environmentally friendly polylysine gauze dressing for an innovative antimicrobial approach to infected wound management

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Chinese Chemical Letters 2024年第10期35卷 309-314页

作者： Yaxian liang Qingyi li liwei Hu Ruohan zhai Fan liu lin Tan Xiaofei Wang Huixu Xie State Key Laboratory of Oral Diseases National Clinical Research Center for Oral DiseasesWest China College of StomatologySichuan UniversityChengdu 610041China College of Biomass Science and Engineering Key Laboratory of Biomass Fibers for Medical Care in Textile IndustrySichuan UniversityChengdu 60065China Division of Thyroid Surgery Department of General SurgeryLaboratory of Thyroid and Parathyroid DiseaseFrontiers Science Center for Disease-Related Molecular NetworkWest China HospitalSichuan University.Chengdu 610041China

Infections frequently occur after skin injuries,posing a significant challenge in current clinical *** changing dressings to minimize wound infections and adhesions results in large amounts of medical ***,developing environmentally friendly multifunctional dressings has considerable application and translational *** study aimed to prepare a wound dressing with favorable antimicrobial properties and biosafety by grafting a natural antimicrobial peptide,polylysine,onto a traditional cotton textile *** cotton textile dressing offers excellent moisture absorption and softness,while polylysine provides excellent biocompatibility,a broad antimicrobial spectrum,and high ***,both materials are natural and biodegradable,making them ideal for environmentally friendly wound dressings.

关键词： Polylysine Modified cotton dressing Antimicrobial Environmentally friendly Infected wound management

Application status and prospect of ionic liquids in oilfield chemistry

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Petroleum 2024年第1期10卷 11-18页

作者： Jinsheng Sun Zhuoyang xiu li li Kaihe Lv Xianfa Zhang Zonglun Wang Zhiwen Dai Zhe Xu Ning Huang Jingping liu School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580China CNPC Engineering Technology R&D Company limited Changping10206China Oil&Gas Technology Research Institute of Changqing Oilfield Company Xi'an710000China

The ionic liquid,as a new treatment agent,has been increasingly applied in oil fields due to its strong temperature resistance,good solubility and high surface *** this paper,we systematically discuss the action mechanism and application effect of ionic liquids in oilfield *** liquids can inhibit shale hydration expansion and reduce fluid loss through adsorption and intercalation,inhibit the formation of natural gas hydrate through imidazole five-membered ring structure as a space barrier,reduce viscosity of heavy oil by breaking chemical bonds of heavy oil macromolecules and charge transfer,improve oil displacement efficiency by forming ions pairs with carboxyl groups in crude oil,demulsify by forming channels between dispersed water droplets,acidify the formation by reacting with water to produce acid,interacts with organic material through weak hydrogen bonds and extracts it from oilfield wastewater,desulphurize by inserting sulfide molecules into the“stack”structure and form liquid inclusion complex,inhibit corrosion by forming a protective film on the metal *** on the above aspects,the development direction of ionic liquids is *** application of ionic liquids in oilfield chemistry is still in its *** is urgent to fully explore the application performance of ionic liquids in oilfield chemistry,which also provides theoretical and technical supports for efficient reservoir development.

关键词： Ionic liquids Oilfield chemistry Shale inhibitor Drilling fluid

Large-area growth of synaptic heterostructure arrays for integrated neuromorphic visual perception chips

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Chip 2024年第2期3卷 88-95页

作者： Yao Deng shenghong liu Manshi li Na Zhang Yiming Feng Junbo Han Yury Kapitonov Yuan li Tianyou zhai State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Wuhan National High Magnetic Field Centre Department of PhysicsHuazhong University of Science and TechnologyWuhan 430074China Department of Radiology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China Department of Photonics Saint Petersburg State UniversitySaint Petersburg 199034Russia Shenzhen Huazhong University of Science and Technology Research Institute Shenzhen 518057China

Two-dimensional metal chalcogenides have garnered significant attention as promising candidates for novel neuromorphic synaptic devices due to their exceptional structural and optoelectronic ***,achieving large-scale integration and practical applications of synaptic chips has proven to be challenging due to significant hurdles in materials preparation and the absence of effective nanofabrication *** a recent breakthrough,we introduced a revolutionary allopatric defect-modulated Fe_(7)S_(8)@MoS_(2)synaptic heterostructure,which demonstrated remarkable optoelectronic synaptic response *** upon this achievement,our current study takes a step further by presenting a sulfurization-seeding synergetic growth strategy,enabling the large-scale and arrayed preparation of Fe_(7)S_(8)@MoS_(2)***,a three-dimensional vertical integration technique was developed for the fabrication of arrayed optoelectronic synaptic ***,we have successfully simulated the visual persistence function of the human eye with the adoption of the arrayed *** synaptic devices exhibit a remarkable ability to replicate the preprocessing functions of the human visual system,resulting in significantly improved noise reduction and image recognition *** study might mark an important milestone in advancing the field of optoelectronic synaptic devices,which significantly prompts the development of mature integrated visual perception chips.

关键词： Two-dimensional(2D) Metal chalcogenides Heterostructures Optoelectronic synapse Artificial vision

Tunable VO_(2) cavity enables multispectral manipulation from visible to microwave frequencies

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light(Science & Applications) 2024年第3期13卷 510-518页

作者： Hang Wei Jinxin Gu Tao Zhao Zhiyuan Yan He-xiu Xu Shuliang Dou Cheng-Wei Qiu Yao li Center for Composite Materials and Structure Harbin Institute of TechnologyHarbin 150001China National University of Singapore Department of Electrical&Computer EngineeringSingapore 117583Singapore School of Chemical Engineering and Technology Harbin Institute of TechnologyHarbin 150001China Suzhou Laboratory Suzhou 215123China

Optical materials capable of dynamically manipulating electromagnetic waves are an emerging field in memories,optical modulators,and thermal ***,their multispectral design preliminarily attracts much attention,aiming to enhance their efficiency and integration of ***,the multispectral manipulation based on these materials is challenging due to their ubiquitous wavelength dependence restricting their capacity to narrow *** this article,we cascade multiple tunable optical cavities with selective-transparent layers,enabling a universal approach to overcoming wavelength dependence and establishing a multispectral platform with highly integrated *** on it,we demonstrate the multispectral(ranging from 400 nm to 3 cm),fast response speed(0.9 s),and reversible manipulation based on a typical phase change material,vanadium *** platform involves tandem VO_(2)-based Fabry–Pérot(F-P)cavities enabling the customization of optical responses at target bands *** can achieve broadband color-changing capacity in the visible region(a shift of~60 nm in resonant wavelength)and is capable of freely switching between three typical optical models(transmittance,reflectance,and absorptance)in the infrared to microwave regions with drastic amplitude tunability exceeding *** work represents a state-of-art advance in multispectral optics and material science,providing a critical approach for expanding the multispectral manipulation ability of optical systems.

关键词： spectral microwave visible

Electronic structure and geometric construction modulation of carbon-based single/dual atom catalysts for electrocatalysis

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Energy Reviews 2024年第3期3卷 76-91页

作者： Shaolong Zhang Jing Huang li Ma Dong zhai Bin Wei Hengpan Yang Chuanxin He College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen518060PR China Pharmaceutical College Guangxi Medical UniversityNanning530021PR China Key Laboratory of New Electric Functional Materials of Guangxi Colleges and Universities Nanning Normal UniversityNanning530023PR China Institute of Molecular Sciences and Engineering Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao266237PR China School of Materials Sun Yat-sen UniversityShenzhen518107PR China

Both carbon-based single atom catalysts(SACs)and dual atom catalysts(DACs)have garnered significant attention in the field of electrochemical reactions because of the impressive attributes,including exceptional catalytic activity,selectivity,and *** ability to modulate the electronic structure and geometric construction of active sites within SACs/DACs is paramount for unleashing their complete potential,which in turn can ultimately dictate catalytic behavior with unprecedented *** this review,the recent major developments of the regulation strategies for modulating electronic structure and geometric construction of carbon-based SACs/DACs are *** the SACs,the recently reported modulation methods are categorized into four strategies,including adjusting the density of single atoms,defect engineering,confinement effect and strain *** for the DACs,the five methods contain bonded dual-atom adjustment,non-bonded and bridged dual-atom adjustment,metal and nonmetal dual-atom adjustment,bilayer dual-atom adjustment and homogeneous dual-atom *** recently developed synthetic strategies are comprehensively summarized,especially their electronic structure and geometric configuration are discussed in detail,the different catalytic applications of electrochemical reactions,and their unique catalytic mechanism are ***,the challenges and prospects of SACs/DACs for tailoring their electronic structures and geometric arrangements are further discussed.

关键词： Electronic structure Geometric construction Single atom catalysts Dual atom catalysts Modulation

The lactylation index predicts the immune microenvironment and prognosis of pan-cancer patients

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BIOCELL 2024年第8期48卷 1223-1239页

作者： XUEJIA zhai JIE liU JINWEI XIAO TAO ZHANG JUN WANG JIANJUN li SHICANG YU Department of Oncology Southwest HospitalThird Military Medical University(Army Medical University)Chongqing400038China Department of Stem Cell and Regenerative Medicine Institute of Pathology and Southwest Cancer CenterSouthwest HospitalThird Military Medical University(Army Medical University)Chongqing400038China Key Laboratory of Cancer Immunopathology Ministry of EducationChongqing400038China International Joint Research Center for Precision Biotherapy Ministry of Science and TechnologyChongqing400038China Jin-feng Laboratory Chongqing401329China

Background:Protein lactylation is a new way for the“metabolic waste”lactic acid to perform novel ***,our understanding of the contribution of protein lactylation to both tumor progression and therapeutic interventions remains *** construction of a scoring system for lactylation to predict the prognosis of pancancer patients and to evaluate the tumor immune microenvironment(TIME)would improve our understanding of the clinical significance of ***:Consensus clustering analysis of lactylation-related genes was used to cluster 177 pancreatic adenocarcinoma(PAAD)***,a scoring system was developed using the least absolute shrinkage and selection operator(LASSO)*** validation and external validation were both conducted to assess and confirm the predictive accuracy of the scoring ***,leucine rich repeat containing 1(LRRC1),a newly discovered lactylation-related gene,was analyzed in PAAD in ***:Utilizing the profiles of 332 lactylation-related genes,a total of 177 patients with PAAD were segregated into two distinct ***^(high) patients had a poorer prognosis than LacCluster^(low) *** the differential analysis between the LacCluster^(high) and LacCluster^(low) groups,we identified additional genes associated with *** genes were then integrated to construct the LacCluster-enhanced system,which enabled more accurate prognosis prediction for patients with ***,a lactylation index containing three genes(LacI-3)was constructed using LASSO *** was done to enhance the usability of the LacCluster-enhanced system in the *** to those in the LacI-3^(high) subgroup,patients in the LacI-3^(low) subgroup exhibited increased expression of immune checkpoint-related genes,more immune cell infiltration,lower tumor mutation burdens,and better prognoses,indicating a“hot tumor”***,knocking down the expression of LRRC1,

关键词： Pancreatic adenocarcinoma Pan-cancer Lactylation Prognosis Tumor immune microenvironment LRRC1

A homopolymolybdate-supported plate-like 2D cobalt network constructed from a new pyrazole-amide-pyridyl ligand: highly electrochemical activity in both capacitive performance and the detection of Cr(Ⅵ)

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Tungsten 2024年第2期6卷 422-427页

作者： xiu-li Wang Yong-Zhen Chen Zhi-Han Chang Yu-Chun lin Jing-Yi Ma College of Chemistry and Materials Engineering Bohai UniversityJinzhou 121013China Professional Technology Innovation Center of liaoning Province for Conversion Materials of Solar Cell Jinzhou 121013China

By employing a new semi-rigid pyrazole-amide-derived bis(pyridyl)ligand[N,N'-bis(4-picolylamine)-1-hydropyrazole(4-dpap)],a new homopolymolybdate-based two-dimensional(2D)plate-like complex[Co(4-dpap)(H_(2)O)(β-Mo_(8)O_(2)6)1/2](1)has been prepared under solvothermal condition and structurally ***β-Mo_(8)anions are fi xed between the 2D metal–organic networks[Co(4-dpap)(H_(2)O)]n 2n+via hydrogen-bonding *** 1 possesses satisfactory specifi c capacitance of 1512.4 F·g^(−1)(current density:1 A·g^(−1))and good cycling stability(90.8%after 1000 cycles).Moreover,1 represents a promising amperometric sensor for measurement of Cr(Ⅵ)with low detection limit(0.042μmol·L^(−1))and high *** insertion ofβ-Mo_(8)anions between the unique 2D metal−organic networks improves the active area of polyoxometalates,which further promotes electrochemical performance.

关键词： Homopolymolybdate Metal–organic network Pyrazole-amide-derived bis(pyridyl)ligand Supercapacitor Electrochemical sensor

Multiple Normalized Solutions for Nonlinear Biharmonic Schr?dinger Equations in ■with L-Subcritical Growth

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Acta Mathematicae Applicatae Sinica 2024年

作者： Jun WANG li WANG Ji-xiu WANG Department of Mathematics Sun Yat-sen University College of Science East China Jiaotong University School of Mathematics and Statistics Hubei University of Arts and Science

In this article, we consider the existence of normalized solutions for the following nonlinear biharmonic Schr?dinger equations:■where c, ε > 0, N ≥ 5, λ ∈ R is a Lagrange multiplier and is unknown, h ∈ C（■N, [0, ∞）), f : R → R is continuous function satisfying L2-subcritical growth. When ε is small enough, we get multiple normalized solutions. Moreover, we also obtain orbital stability of the solutions.

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