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Modern developments related to nanotechnology and nanoengineering of concrete

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Frontiers of Structural and Civil Engineering 2016年第2期10卷 131-141页

作者： konstantin SOBOLEV Department of Civil and Environmental Engineering University of gqsconsin-Milwaukee P.O. Box 413 Milwaukee W153201 USA

This paper reports on modem developments related to nanotechnology of cement and concrete. Recent advances in instrumentation and design of advanced nano-composite materials is discussed. New technological directions and historical milestones in nanoengineering and nanomodification of cement-based materials are presented. It is concluded that there is a strong potential of nanotechnology to improve the performance of cement-based materials.

关键词： nanotechnology cement concrete nanoparticle nano-composite nanomodification carbon nanotubes C-S-Hgel photocatalyst

Conical Intersection versus Avoided Crossing:Geometric Phase Effect in Molecular High-Order Harmonics

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Ultrafast Science 2023年第5期3卷 61-66页

作者： Guanglu Yuan Ruifeng Lu Shicheng Jiang konstantin Dorfman Institute of Ultrafast Optical Physics MIIT Key Laboratory of Semiconductor Microstructure and Quantum SensingDepartment of Applied PhysicsNanjing University of Science and TechnologyNanjing 210094China State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200062China Center for Theoretical Physics and School of Science Hainan UniversityHaikou 570228.China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuanShanxi 030006China Himalayan Institute for Advanced Study Unit of Gopinath Seva FoundationMIG 38Avas VikasRishikeshUttarakhand 249201India

Nonadiabatic dynamics around an avoided crossing or a conical intersection play a crucial role in the photoinduced processes of most polyatomic *** present work shows that the topological phase in conical intersection makes the behavior of pump-probe high-order harmonic signals different from the case of avoided *** coherence built up when the system crosses the avoided crossing will lead to the oscillatory behavior of the spectrum,while the geometric phase erodes these oscillations in the case of conical ***,the dynamical blueshift and the splitting of the time-resolved spectrum allow capturing the snapshot dynamics with the sub-femtosecond resolution.

关键词： intersection conical spectrum

电喷雾萃取电离-串联质谱测定鲜竹沥中的二苯并[a,h]蒽

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分析测试学报 2024年第8期43卷 1280-1286页

作者：幸慧玉周亮朱腾高康斯坦丁刘九梅陈焕文方小伟江西中医药大学药学院江西南昌330004 江西中医药大学生命样品直接质谱分析研究室江西南昌330004 江西省地质局物化探大队江西南昌330000 江西省检验检测认证总院检测认证技术发展研究院江西南昌330052

采用电喷雾萃取电离-串联质谱(EESI-MS/MS)技术,在优化条件下建立了鲜竹沥中二苯并[a,h]蒽(DBA)的快速检测方法。在正离子检测模式下,对离子传输管温度、喷雾电压、电喷雾溶剂流速、样品流速进行优化。以硝酸银的甲醇溶液为电喷雾溶剂,... 详细信息

采用电喷雾萃取电离-串联质谱(EESI-MS/MS)技术,在优化条件下建立了鲜竹沥中二苯并[a,h]蒽(DBA)的快速检测方法。在正离子检测模式下,对离子传输管温度、喷雾电压、电喷雾溶剂流速、样品流速进行优化。以硝酸银的甲醇溶液为电喷雾溶剂,诱导DBA和Ag+形成[DBA+Ag]+、[2DBA+Ag]+等特征离子,再结合碰撞诱导解离技术,最终实现了鲜竹沥中DBA的快速定性定量检测。实验结果表明,DBA在0.1~100μg/L质量浓度范围内线性良好,线性相关系数(r2)为0.998 0,方法检出限(LOD)为0.054μg/L,定量下限(LOQ)为0.179μg/L。该方法对鲜竹沥中DBA的加标回收率为81.5%~87.1%,相对标准偏差为1.9%~3.9%。所建方法具有无需复杂样品预处理、准确度高、可直接快速检测等优点,适用于鲜竹沥中DBA的快速筛查与直接分析,同时也为其他PAHs的检测提供了技术手段。

关键词：电喷雾萃取电离-串联质谱(EESI-MS/MS) 鲜竹沥二苯并[a,h]蒽(DBA) 直接分析

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Health and safety perspectives of graphene in wearables and hybrid materials

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Journal of Materials Science & Technology 2023年第24期155卷 10-32页

作者： Premika Govindaraj Azadeh Mirabedini Xing Jin Dennis Antiohos Nisa Salim Phil Aitchison Jake Parker Franz konstantin Fuss Nishar Hameed Faculty of Science Engineering and Technology Swinburne University of Technology Hawthorn Melbourne VIC 3122 Australia Aerospace Engineering and Aviation School of Engineering RMIT University Bundoora Melbourne VIC 3083 Australia Institute for Frontier Materials Deakin University Geelong VIC 3216 Australia Imagine Intelligent Materials Sydney NSW 2018 Australia Sparc Technologies Kent Town South Australia 5067 Australia Chair of Biomechanics Faculty of Engineering Science University of Bayreuth Bayreuth D-95440 Germany

The growing demand for smart wearables, coupled with the omnipresence of graphene due to its array of outstanding thermal, electrical, and mechanical properties, have driven the industry-led initiatives to develop lightweight, smart, and robust graphene-based wearable technologies. The substantial research and the increase in technology readiness levels (TRLs) of graphene-based technologies have led to the adoption of graphene in many industries. Graphene-based wearables are one such technology that involves closer interaction of graphene by the end-user. Despite this, understanding the toxicological risks associated with using graphene-based wearables is still in the fundamental stage. Herein, graphene-based wearables and industrial-scale fabrication techniques for the development of graphene-based wearables are reviewed. The main goal of the review is to initially evaluate the likelihood of user exposure to graphene from the wearable device and the potential health effects. The subsequent health risks based on graphene's physicochemical characteristics are also discussed. A framework to elucidate the risk is presented in terms of crucial exposure routes, possible graphene interactions, recent exposure assessments, detection removal techniques from the human body, and risk management protocols. It is hoped that this review may aid towards establishing a reasonable practice concerning the safe integration of graphene materials into wearables and facilitate their commercialization.

关键词： Graphene Wearables Composites Nanomaterials Smart materials Health and safety

Characterization of the stability and dynamics of a laser-produced plasma expanding across a strong magnetic field

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Matter and Radiation at Extremes 2022年第2期7卷 53-61页

作者： Weipeng Yao Julien Capitaine Benjamin Khiar Tommaso Vinci konstantin Burdonov Jérôme Béard Julien Fuchs Andrea Ciardi LULI–CNRS CEASorbonne UniversitéEcole PolytechniqueInstitut Polytechnique de ParisF-91128 Palaiseau cedexFrance Sorbonne Université Observatoire de ParisUniversitéPSLCNRSLERMAF-75005 ParisFrance Office National d’Etudes et de Recherches Aérospatiales(ONERA) F-91123 PalaiseauFrance IAP Russian Academy of Sciences603950 Nizhny NovgorodRussia LNCMI UPR 3228CNRS-UGA-UPS-INSAF-31400 ToulouseFrance

Magnetized laser-produced plasmas are central to many studies in laboratory astrophysics,in inertial confinement fusion,and in industrial ***,we present the results of large-scale three-dimensional magnetohydrodynamic simulations of the dynamics of a laser-produced plasma expanding into a transverse magnetic field with a strength of tens of *** simulations show the plasma being confined by the strong magnetic field into a slender slab structured by the magnetized Rayleigh–Taylor instability that develops at the plasma–vacuum *** find that when the initial velocity of the plume is perturbed,the slab can develop kink-like motions that disrupt its propagation.

关键词： expanding dynamics magnetic

Intermetallic Getters Reactants for Vacuum Applications

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Materials Sciences and Applications 2023年第3期14卷 222-239页

作者： konstantin Chuntonov NanoShell Consulting Migdal Haemek Israel

The present work continues a series of publications devoted to the study of the sorption properties of reactive alloys based on IIA metals and the development of advanced getter materials for gas and vacuum technologies. This publication attempts to answer the current challenges in the field of gas sorption associated with the emergence of new vacuum products such as vacuum insulated glasses, electronic systems, cryogenic devices, etc. An analysis of the problems that arise here, as well as the results of sorption measurements, carried out with the participation of intermetallic phases of the composition CaLi2 and Ca0.33Li0.48Mg0.19, show that the best getter support for these new hermetically sealed products can be provided by intermetallic compounds formed in systems Li-IIA metals. Intermetallic phases of this family are easy to manufacture and demonstrate outstanding service characteristics: their specific sorption capacity is recorded high, exceeding traditional gas sorbents in this respect by at least an order of magnitude;the kinetics of gas capturing is set at the stage of alloy production, i.e., is adjustable;the temporary resistance of these phases to atmospheric gases allows to install the getter at its workplace in air, without further thermal activation. The sorption superiority of reactive intermetallics is explained by their special sorption mechanism: the gas/metal interaction is formed here as a combination of two processes, continuous growth of reaction products on a metallic surface and corrosion decay of brittle intermetallic phase under mechanical forces, which feeds the chemical reaction with a fresh surface. The advantages of sorption processes of this new type are undoubted and significant: compared with the conventional sorbents, an intermetallic getter reactant solves two important problems;it reduces production costs and increases the sorption yield.

关键词： Vacuum Devices Gas Sorption Getters Intermetallic Phases Corrosion

A critical review of self-diverting acid treatments applied to carbonate oil and gas reservoirs

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Petroleum Science 2023年第2期20卷 922-950页

作者： Mohammed Al-Shargabi Shadfar Davoodi David A.Wood Mohsen Ali Valeriy S.Rukavishnikov konstantin M.Minaev School of Earth Sciences&Engineering Tomsk Polytechnic UniversityLenin AvenueTomskRussia DWA Energy Limited LincolnUnited Kingdom Oil and Gas Fields Development and Operation Department Samara State Technical UniversityMolodogvardeyskaya StreetPerakSamaraRussia

Carbonate reservoirs generally achieved relatively low primary resource recovery *** is therefore often necessary to clean those reservoirs up and/or stimulate them post drilling and later in their production life.A common and basic carbonate reservoir cleanup technique to remove contaminating material from the wellbore is *** efficiency of acid treatments is determined by many factors,including:the type and quantity of the acid used;the number of repeated treatments performed,heterogeneity of the reservoir,water cut of the reservoir fluids,and presence of idle zones and ***-treatment production performance of such reservoirs frequently does not meet design *** is therefore much scope to improve acidizing technologies and treatment designs to make them more reliable and *** review considers acid treatment technologies applied to carbonate reservoirs at the laboratory scale and in field-scale *** range of acid treatment techniques commonly applied are *** between specific acid treatments,such as foamed acids,acid emulsions,gelled and thickened acid systems,targeted acid treatments,and acid hydraulic fracturing are described in terms of the positive and negative influences they have on carbonate oil production rates and *** to improve acid treatment techniques are identified,particularly those involving the deployment of nanoparticles(NPs).Due consideration is also given to the potential environmental impacts associated with carbonate reservoir acid *** are made regarding the future research required to overcome the remaining challenges pertaining to acid treatment applications.

关键词： Enhanced and improved resource recovery Hydraulic fracturing Nanofluids Viscoelastic surfactants Self-diverting acid Hydrophobic emulsions Gels

IFIH1 and DDX58 gene variants in pediatric rheumatic diseases

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World Journal of Clinical Pediatrics 2023年第3期12卷 107-114页

作者： Rinat Raupov Evgeny Suspitsin konstantin Belozerov Tatiana Gabrusskaya Mikhail Kostik Department of Pediatry Saint-Petersburg State Pediatric Medical UniversitySaint-Petersburg 194100Russia Department of Genetics Saint-Petersburg State Pediatric Medical UniversitySaint-Petersburg 194100Russia Department of Gastrointestinal Diseases Saint-Petersburg State Pediatric Medical UniversitySaint-Petersburg 194100Russia

BACKGROUND The IFIH1 gene codes the MDA5 protein and the DDX58 gene codes the RIG-I *** proteins are parts of the interferon(IFN)I signaling pathway and are responsible for antiviral defense and innate immune ***1 and DDX58 polymorphisms are associated with a spectrum of autoimmune *** gain-of-function IFIH1 mutations have been found in Singleton-Merten and Aicardi-Goutières syndrome,while DDX58 mutation can cause atypical Singleton-Merten *** To characterize children with pediatric rheumatic diseases(PRD)carrying DDX58 or IFIH1 *** Clinical exome sequencing was performed on 92 children with different ***1 and DDX58 variants have been detected in 14 ***-I score has been analyzed and the clinical characteristics of patients have been *** A total of seven patients with systemic lupus erythematosus(SLE)(n=2),myelodysplastic syndrome with SLE features at the onset of the disease(n=1),mixed connective tissue disease(MCTD)(n=1),undifferentiated systemic autoinflammatory disease(uSAID)(n=3)have 5 different variants of the DDX58 gene.A common non-pathogenic variant p.D580E has been found in five children.A rare variant of uncertain significance(VUS)p.N354S was found in one patient with uSAID,a rare likely non-pathogenic variant p.E37K in one patient with uSAID,and a rare likely pathogenic variant ***864fs in a patient with *** IFN-I score was detected in 6 of 7 patients with DDX58 *** patients had six different IFIH1 *** were presented with uSAID(n=2),juvenile dermatomyositis(JDM)(n=1),SLElike disease(n=1),Periodic fever with aphthous stomatitis,pharyngitis,and adenitis syndrome(n=1),and systemic onset juvenile idiopathic arthritis(n=1).Three patients have VUS p.E627X,one patient has benign variant *** VUS p.R595H was detected in the JDM *** rare VUS p.L679Ifs*2 and previously not reported variant p.V599Ffs*5 were detected in the patient with uS

关键词： IFIH1 DDX58 Undifferentiated systemic autoinflammatory disease Systemic lupus erythematosus Interferon-I score©The Author(s)2023.Published by Baishideng

Influence of non-covalent interactions on properties of lanthanide systems with aromatic ligands

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Journal of Rare Earths 2008年第2期26卷 146-152页

作者： Lada Puntus konstantin Lyssenko Laboratory of Molecular Nanoelectronics Institute of Radioengineering & Electronics Russian Academy of Sciences 11-7 MokhovayaMoscow 125009 Russia A. N. Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences GSP-1 28 Vavilov StreetMoscow 119991 Russia

Two series of lanthanide compounds, namely, chlorides containing different numbers of both 1,10-phenanthroline （Phen） molecules and chloride anions in the first coordination sphere, and Schiff Bases （SBs） derived from Pyridoxal （PL） and amino acids, were characterized by single crystal X-ray diffraction and luminescence techniques. The combined use of these techniques for the analysis of long-distance europium non-covalent interactions was performed for the first time. As a result, the correlation between supramolecular organization and the features of the Eum electronic transitions was found for the compounds of the first series. Strong non-covalent interactions between pyridoxal tings of SBs （the second series of compotmd） led to the formation of 1：2 species and four-dentate coordination function of these SBs in aqueous solution.

关键词： n-stacking interaction luminescence lanthanides halogenides Schiff base rare earths