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Synchrotron Characterisation of Ultra-Fine Grain TiB_(2)/Al-Cu Composite Fabricated by Laser Powder Bed Fusion

Acta Metallurgica Sinica(English Letters) 2022年第1期35卷 78-92页

作者： Sheng Li Biao Cai Ranxi Duan Lei Tang Zihan Song Dominic White oxana v.magdysyuk Moataz M.Attallah School of Metallurgy and Materials University of BirminghamEdgbastonBirminghamB152TTUK Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen518055China ZEISS House Building 1030Cambourne Business ParkCambourneCambridgeCB236DWUK Diamond Light Source Ltd Harwell Science and Innovation CampusDidcotOX110DEOxfordshireUK

Isotropy in microstructure and mechanical properties remains a challenge for laser powder bed fusion(LPBF)processed materials due to the epitaxial growth and rapid cooling in *** this study,a high-strength TiB_(2)/Al-Cu composite with random texture was successfully fabricated by laser powder bed fusion(LPBF)using pre-doped TiB_(2)/Al-Cu composite powder.A series of advanced characterisation techniques,including synchrotron X-ray tomography,correlative focussed ion beam-scanning electron microscopy(FIB-SEM),scanning transmission electron microscopy(STEM),and synchrotron in situ X-ray diffraction,were applied to investigate the defects and microstructure of the as-fabricated TiB_(2)/Al-Cu composite across multiple length *** study showed ultra-fine grains with an average grain size of about 0.86μm,and a random texture was formed in the as-fabricated condition due to rapid solidification and the TiB_(2)particles promoting heterogeneous *** yield strength and total elongation of the as-fabricated composite were 317 MPa and 10%,*** contributions of fine grains,solid solutions,dislocations,particles,and Guinier-Preston(GP)zones were *** was found to be initiated from the largest lack-of-fusion pore,as revealed by in situ synchrotron tomography during tensile *** situ synchrotron diffraction was used to characterise the lattice strain evolution during tensile loading,providing important data for the development of crystal-plasticity models.

关键词： Aluminium metal matrix composite Laser powder bed fusion Heterogeneous nucleation Synchrotron characterisation

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Porphyrins,phthalocyanines,and related covalent-organic frameworks in the photochemical and electrochemical water splitting:A review

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Particuology 2024年第7期90卷 236-265页

作者： oxana v.Kharissova Yolanda Peña Méndez Boris I.Kharisov Aleksandr LNikolaev Edith Luévano-Hipólito Lucy T.González Universidad Autónoma de Nuevo León Ave.Universidad s/nSan Nicolás de los GarzaNuevo León66455Mexico Department of Chemistry Moscow State UniversityVorobievy HillsMoscowRussia CONACYT-Universidad Autónoma de Nuevo León Facultad de Ingeniería Civil-Departamento de Ecomateriales y EnergíaCd.UniversitariaC.P.66455San Nicolás de los GarzaNLMexico Tecnologico de Monterrey Escuela de Ingeniería y CienciasMonterreyNuevo León 64890Mexico Tecnologico de Monterrey Centro del AguaMonterreyNuevo León 64890Mexico

In this review,the possibilities of photochemical and electrochemical water splitting(WS)using porphyrins,phthalocyanines,related macrocycles,and their metal complexes are *** efforts are being carried out in order to develop novel and cheap methods for water decomposition to generate inexhaustible greener energy sources(molecular hydrogen)instead of oil and *** processes of WS in heterogeneous and homogeneous media require novel photo-and electrocatalysts,in particular those on macrocycle basis.A high WS efficiency has been observed for porphyrins and phthalocyanines,showing their suitability both for HER and OER processes are available using these relative compounds for WS *** can be used in photocatalytic and electrocatalytic WS processes both in their free forms or as metal porphyrins/porphyrinates,mainly loaded on various inorganic materials,such as Au NPs,C_(3)N_(4),GaP,KTaO_(3),GaP,and so on,as part of porphyrin-containing polymers or on electrode surface as modifying coatings,being sometimes better than commercial catalysts,such as Pt/*** H2 evolution can be considerably depended on the shape of porphyrin particles;in particular,porphyrin nanowires can yield up to 20 times more H2 than its *** certain cases,both HER and OER can be driven in the same electrolyte using metal *** capacity of metal porphyrins to generate ROS(in particular,singlet oxygen 1O_(2))under ultrasonic treatment is known and can be successfully used for H_(2)O_(2) and O_(2) *** can be used in similar processes in free form or as composites with inorganic or organic counterparts,being immobilized on nanocarbons,metal oxides and salts,or simply dissolved in water acting in a homogeneous *** additional use of ultrasound can lead to better results due to the synergistic effect of the sonochemical treatment and ***-organic frameworks are also applied for WS purposes and are mainly based

关键词： Porphyrins Phthalocyanines COFs Water splitting Photocatalysis Electrocatalysis

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Hydroxyapatite composites with carbon allotropes:Preparation,properties,and applications

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Particuology 2024年第5期88卷 239-265页

作者： Boris I.Kharisov oxana v.Kharissova Lucy T.González Yolanda Peña Méndez Igor E.Uflyand Idalia Gómez de la Fuente Universidad Autónoma de Nuevo León Ave.UniversidadCiudad UniversitariaSan Nicolás de los GarzaNuevo León 66455Mexico Tecnologico de Monterrey Escuela de Ingeniería y CienciasMonterreyNuevo Leon 64890Mexico Department of Chemistry Southern Federal UniversityRostov-on-DonRussia

Hydroxyapatite(HA)and its composites with inorganic additives,dopants,and polymers is a rapidly developing branch in the materials *** particular,carbon allotropes are widely used in these composites being widely applied for medical *** a gap of insufficient generalization of recent achievements in the field of the HA/Carbon composites,in this review we present the state of the art of the field of HA composites and hybrids with classic carbon allotropes and *** composites are known for carbon nanotubes,nanofibers,graphene and its oxidized forms,as well as,in a lesser grade,for graphite,fullerenes,nanodiamonds,carbon nanofoams,*** composites can be fabricated by a variety of classic and less-common methods,such as co-precipitation(with or without ultrasonic treatment),CvD,hot isostatic pressing,hydrothermal,spark plasma sintering,biomimetic mineralization,thermal and plasma spray,electrochemical and electrophoretic deposition,self-assembling,3D printing,electrospinning,and lyophilisation,among *** of various synthesis techniques can be also carried out for composite *** or synthetic HA can be used as it is for further interaction with carbon allotropes or it can be first prepared and then reacted with carbon counterpart;similarly,carbon allotropes can be introduced into the interaction with HA directly or they can be first synthesized,in particular from *** biocompatible composites can be produced in the form of coatings,powders,and scaffolds and can additionally contain quantitative amounts of third phases,frequently natural or synthetic *** these composites,especially with O-containing functionalizing groups,HA disadvantages could be considerably decreased with simultaneous enhancement of mechanical properties,becoming similar to human bone,chemical stability and biocompatibility,as well as possessing antibacterial ***→G reduction and higher HA decoration were obs

关键词： Hydroxyapatite Carbon nanotubes Graphene Quantum dots Fullerenes Nanodiamonds

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WAvELET-BASED ANALYSIS OF CEREBROvASCULAR DYNAMICS IN NEWBORN RATS WITH INTRACRANIAL HEMORRHAGES

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Journal of Innovative Optical Health Sciences 2014年第1期7卷 66-75页

作者： ALEXEY N.PAvLOv ALEXEY I.NAZIMOv OLGA N.PAvLOvA vLADISLAv v.LYCHAGOv vALERY v.TUCHIN OLGA A.BIBIKOvA SERGEYS.SINDEEv oxana v.SEMYACHKINA-GLUSHKOvSKAYA Department of Physics Saratou State University 83 Astrakhanskaya str.Saratou 410012Russia

Intracranial hemorrhage(I)is a major problem of neonatal intensive *** incidence of Iistypically asymptomatic and'canmot be effectively detected by standard diagnostic *** mechanisms underlying IH are unknown but there is evidence that stress-induced disorders inadrenergic regulation of cerebral venous blood flow (CvBF) are among the main *** and qualitative:could significantly advance understanding ofthe nature of I in newbornslth1sions of CvBF in newborn rats withan experimental model of *** analysis is bas ed on theDoppler optical coheavelet-based approachthat provides sensitiv external *** resultsccompanied by asupprectivity to *** show that the values0velopent of *** conclude that t he revealed areactivity of the cerebral veins to adrenaline represents a possible mechanism responsible forpat hological changes in CvBF.

关键词： Brain hemorhages optical coherence tomography cerebrovascular dynamics wavelet analy sis stress.

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Hidden stage of intracranial hemorrhage in newborn rats studied with laser speckle contrast imaging and wavelets

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Journal of Innovative Optical Health Sciences 2015年第5期8卷 99-106页

作者： Alexey N.Pavlov Arkady S.Abdurashitov Olga N.Pavlova valery v.Tuchin Olga S.Sindeeva Sergey S.Sindeev oxana v.Semyachkina-Glushkovskaya Department of Physics Saratov State University 83 Astrakhanskaya Str.Saratov 410012Russia Department of Biology Saratov State University 83 Astrakhanskaya Str.Saratov 410012Russia

Using the laser speckle contrast imaging and wavelet-based analyses,we investigate a latent("hidden")stage of the development of intracranial hemorrhages(ICHs)in newborn *** apply two measures based on the continuous wavelet-transform of blood flow velocity in the sagittal sinus,namely,the spectral energy in distinct frequency ranges and a multiscality degree characterizing complexity of experimental *** show that the wavelet-based multifractal formalism reveals changes in the cerebrovascular blood flow at the development of ICH.

关键词： Cerebral blood flow laser speckle contrast imaging stress wavelet-analysis complexity

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Characterization of cerebral blood flow dynamics with multiscale entropy

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Journal of Innovative Optical Health Sciences 2017年第5期10卷 85-93页

作者： Alexey N.Pavlov Arkady S.Abdurashitov Olga N.Pavlova Maria v.Ulanova Anastasia A.Bodrova Natalia A.Shushunova Alexander P.Khorovodov oxana v.Semyachkina-Glushkovskaya Yuri Gagarin State Technical University of Saratov 77 Politechnicheskaya Street Saratov 410054Russia Saratov National Research State University 83 Astrakhanskaya Street Saratov 410012Russia

Based on the laser speckle contrast imaging(LSCI)and the multiscale entropy(MSE),we study in this work the blood flow dynamics at the levels of cerebral veins and the surrounding network of microcerebral *** discuss how the phenylephrine-related acute peripheral bypertension is refected in the cerebral circulation and show that the observed changes are scale dependent,and they are signifcantly more pronounced in microcerebral vessels,while the macrocerebral dynamics does not demonstrate authentic inter-group *** also consider the permeability of blood-brain barrier(BBB)and study its opening caused by sound *** show that alterations associated with the BBB opening can be revealed by the analysis of blood flow at the level of macrocerebral vessels.

关键词： Cerebral blood flow laser speckle contrast imaging arterial pressure complexity

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THE EXPERIMENTAL STUDY OF STRESS-RELATED PATHOLOGICAL CHANGES IN CEREBRAL vENOUS BLOOD FLOW IN NEWBORN RATS ASSESSED BY DOCT

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Journal of Innovative Optical Health Sciences 2013年第3期6卷 76-85页

作者： oxana v.SEMYACHKINA-GLUSHKOvSKAYA vLADISLAv v.LYCHAGOv OLGA A.BIBIKOvA IGOR A.SEMYACHKIN-GLUSHKOvSKIY SERGEY S.SINDEEv EKATERINAM.ZINCHENKO MOHHANAD M.KASSIM AL-FATLE FATEMA ALI AL HASSANI LEITH MARIA v.ULANOvA vALERY v.TUCHIN Department of Biology Saratov State UniversityAstrachanskaya Str.83410012 SaratovRussian Federation Department of Biology Al-Mustansiriya UniversityBaghdadIraq Institute of Precise Mechanics and Control of Russia Academy of Science Rabochaya 28 410028 SaratovRussian Federation Optoelectronics and Measurement Techniques Laboratory University of Oulu P.O.BOX 450090014 University of OuluFinland

In experiments on newbom rats with stress related intracrani al hemorhage(ICH)using Doppler optical coberence tomognaphy(DOCT)we have shown that latent stage of ICH(4 h after stress)is characterized by decrease of venous blood outflow and the loss of sensitivity of sagittal vein to vasoconstrictor ffect of *** incidence of ICH(24 h after stress)was accompanied by progressi on of early pathological changes in cerebral venous blood flow(CvBF)and development of venous *** into consideration of this fact,we suggest that the suppression of CvBF related to the severity to the deleterious effect of stress on the brain hemodynamics in newborn *** facts allow us to conclude that the venous insufficiency with the loss of vasoconstrictor response to adrenaline is an informative and sensitive component of pattern of CvBF that can be important diagnostic criteria of risk of ICH development in newborns.

关键词： Doppler optical coherence tomography stress related intracnanial hemorthage cerebral venous blood flow adrenaline

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Morphofunctional status and the role of mononuclear phagocyte system lung compartment in the pathogenesis of influenza A (H5N1) in mammals

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Advances in Bioscience and Biotechnology 2013年第11期4卷 979-985页

作者： Anna v. Kovner oxana v. Potapova vyacheslav A. Shkurupy Alexander M. Shestopalov FSBI Research Center of Clinical and Experimental Medicine Siberian Branch of the Russian Academy of Medical Sciences No- vosibirsk Russia

Influenza and other respiratory viral infections account for 80%-90% of infectious pathologies. Influenza A (H5N1) virus has an apparent pneumotropism, and therefore the lung compartment of mononuclear phagocyte system plays an important role in antiviral immunity. Lung macrophages are active phagocytes expressing variety of antiviral factors. The investigation of morphofunctional status of lung macrophages and evaluation of their role in mammal antiviral response in a mouse model were performed within the study. Methods: Light microscopy using standard hematoxylin-eosin, and van-Gizon’s picrofuchsin staining. Immunohistochemistry using influenza A antigen marker specific primary antibodies, myeloperoxidase, cathepsin D, lysozyme, NO synthase, pro-inflammatory cytokines, cells of CD68 macrophage lineage, PCNA proliferative activity. Morphometric and statistical analysis. Results: Influenza A virus antigen was detected in lung macrophages starting from day 1 to day 14 of infection which corresponds with the beginning of convalescence and may be suggestive of prolonged persistence of virus. On the one hand, the cytopathic effects of the virus lead to lung macrophages death mainly via apoptosis through activation of caspase cascade, including caspase-3 and caspase-9. On the other hand, the observed activation of PCNA proliferation marker, perhaps, allows to support the pool of lung macrophages not only by their recruitment from bone marrow but also by their proliferation in situ. The increase of mononuclear phagocyte system cells expressing antiviral factors depended on the stage of infection. In the early stage, there was an increase of number of cells expressing lysozyme, myeloperoxidase, cathepsin D, endothelial NO synthase (eNOS) followed by the increase of number of macrophages expressing inducible NO synthase (iNOS), pro-inflammatory cytokines and interleukins.

关键词： The Influenza A (H5N1) virus Macrophages of Lungs Cathepsin D Myeloperoxidase Lysozyme iNOS eNOS TNF-α IL-6 PCNA Cell Death

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Blood–brain barrier and laser technology for drug brain delivery

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Journal of Innovative Optical Health Sciences 2017年第5期10卷 27-38页

作者： oxana v.Semyachkina-Glushkovskaya Arkady S.Abdurashitov Elena I.Saranceva Eketerina G.Borisova Alexander A.Shirokov Nikita v.Navolokin Saratov State University 83 Astrakhanskaya Str.Saratov 410012 Russia Institute of Electronics Bulgarian Academy of Sciences TsarigradskoChaussee 72 Sofia 1784Bulgaria Institute of Biochemistry and Physiology of Plants and Microorganisms Russian Academy of Sciences 13 Prospekt EntuziastovSaratov 410049Russia Saratov State Medical University Saratov 410010 Russia

Here,we discuss an important problem in medicine as development of efctive strategies for brain drug *** problem is related to the blood-brain barrier(BBB),which is a“customs”controlling the entrance of different molecules from blood into the brain protecting the normal function of central nervous system(CNS).We show three interfaces of anatomical side of BBB and two functional types of BBB一physical and transporter *** this protective mechanism is essential for health of CNS,it also creates a hindrance to the entry of drugs into the *** BBB was discovered over 100 years ago but till now,there is no efective methods for brain drug *** ane more than 70 approaches for overcoming BBB incuding physical,chenical and biological techniques but all of these tools have limitation to be widely used in clinical practice due to invasi venes,challenge in performing,very costly or lim-itation of drug *** therapy(PDT)is usual clinical method of surgical navigation for the resection of brain tumor and anti-cancer ***,the application of PDT is considered as a potential promising tool for brain drug delivery via opening of ***,we show the first sucoessful experimental results in this field discussing the adventures and disadv antages of PDT-related BBB disruption as well as altematives to overcome these limitations and possi ble mechanisms with new pathways for brain clearance via gly mphatic and lymphatic systems.

关键词： Blood-brain barrier laser technologies photodynamic therapy brain drug delivery

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Effect of Nanoparticles on Mechanical Properties of Cement-Sand Mortar Applications

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Advances in Chemical Engineering and Science 2017年第3期7卷 270-276页

作者： José Salvador Cavazos Gustavo González oxana v. Kharissova Beatriz Ortega Laura Peñ a Mario Osorio Mauricio Garza-Castañ ón Universidad de Monterrey Physics and Mathematics Department Engineering and Technologies Division San Pedro Garza-García N.L.México Universidad Autónoma de Nuevo León Facultad de Ciencias Físico-Matemáticas Pedro de Alba S/N Ciudad Universitaria San Nicolás de los Garza N.L. Mexico

Cement-sand mortar is a construction material widely used;tile adhesive is one of the main applications where the compressive strength is the key performance metric. Nanoparticles like MWCNTs and HNTs are currently being used to improve the mechanical performance of the cement mortar due to their properties. The cost of MWCNTs has limited their application in the construction industry. This study focuses on the effect of two different concentrations of MWCNTs and HNTs in cement mortar;HNTs are proposed in this study to compare performance and cost overall benefits. A common problem with MWCNTs is agglomeration;to achieve a proper dispersion an ultrasonic processor was utilized. Mechanical properties of a cement mortar modified with nanoparticles were investigated with compression and bending tests on specimens performed at the age of 7 days. Results showed that concentrations of 0.1% of MWCNTs increase in compression strength by 56% and concentrations of 0.1% of HNTs performance increased by 31%, both compared to plain cement mortar.

关键词： Mechanical Properties Compressive Strength Cement Cement Manufacture

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