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World Journal of Nano Science and Engineering 2012年第3期2卷 117-125页

作者： Nadiia A.Ivashchenko Wojciech Gac valentyn A.Tertykh viktor v.yanishpolskii Sergei A.Khainakov Alla v.Dikhtiarenko Sylwia Pasieczna-Patkowska Witold Zawadzki Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine KyivUkraine Faculty of Chemistry Maria Curie-Skłodowska UniversityLublinPoland Department of Organic and Inorganic Chemistry Faculty of ChemistryUniversity of OviedoOviedoSpain

Novel in-situ reduction approach was applied for the synthesis of palladium nanoparticles in the pores of mesoporous silica materials with grafted siliconhydride groups. Matrices possessing different structural properties (MCM-41, SBA-15 and Silochrom) were used. Samples were studied by nitrogen adsorption-desorption method, low-angle X-ray diffraction, transmission electron microscopy (TEM) and FT-IR/PAS spectroscopy. The temperature-programmed oxidation (TPO) and reduction (TPR) methods were applied to examine reducibility of palladium species. Palladium containing catalysts were tested in methane oxidation reaction. It was demonstrated that relatively large pores in SBA-15 type silica facilitated formation of well-dispersed palladium nanoparticles confined in the pores channels. In the case of MCM-41 support, metallic palladium nanoparticles were formed on the external surface. The obtained materials showed high catalytic activity. Lower activity of the samples containing small crystallites located in the pore volume at high temperatures was related to worse accessibility of active sites to the reation mixture.

关键词： Palladium Nanoparticles Siliconhydride Groups Mesoporous Ordered Silica MCM-41 SBA-15 Palladium-Containing Nanocomposites Methane Oxidation

Magnetic methods in studies of new superconducting hydrides in a diamond anvil cell

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National Science Review 2024年第7期11卷 16-18页

作者： viktor v.Struzhkin Ho-kwang Mao Center for High Pressure Science&Technology Advanced Research

In recent years, we have witnessed great success in discoveries of high-transition-temperature（Tc） hydrides using high-pressure experiments. This has been achieved by creating metallic hydrogen‘alloys’ with other ...

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Quality of drinking water and risk to the health of the population of the south Baikal region (Russia)

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Emerging Contaminants 2024年第2期10卷 106-114页

作者： viktor S.Rukavishnikov Natalia v.Efimova Mikhail F.Savchenkov Inna v.Mylnikova Alexander A.Lisovtsov East-Siberian Institute of Medical and Ecological Research 665827AngarskRussia

Providing good quality water in sufficient quantities is a major challenge in the *** purpose of the study is to assess the quality of drinking water and the health risk of various population groups in the southern Baikal region(Siberia,Russia)under changing hydrological *** Baikal is the largest freshwater body of water and is one of the sites protected by *** and *** analysis of centralized and non-centralized water supply was carried out in the south-eastern part of the Irkutsk region,adjacent to Lake *** data used are from the Baikal(regional)Information Center for 2011–2022,and they include the results of monitoring the water quality of the centralized domestic and drinking water supply(CDW)with 140 thousand samples,and non-centralized domestic and drinking water supply(NDW)with 108 thousand *** all samples,17 substances were *** addition,during the flood period,accompanied by additional water disinfection,trihalomethanes were determined in populated areas exposed to negative *** quality of drinking water was assessed in comparison with the maximum permissible concentrations of substances(MPCs)approved by regulatory documents of *** assessment of the characteristics of drinking water consumption by the population of the Baikal region was carried out,based on interview data from sample groups of the *** assessment of the risk to public health,due to chronic oral intake of chemicals,was carried out using the values of the hazard coefficient(HQi),the hazard index(HI),individual carcinogenic risk(ICR),and population carcinogenic risk(PCR).village residents more often use underground water sources(centralized and non-centralized).Residents of cities are provided with water from surface sources(Lake Baikal and the Angara River).Significant concentrations of iron,nitrates,and manganese were found in drinking water used by *** concentrations of iron-2.25 mg/dl,manganese

关键词： Drinking water Noncarcinogenic risk Carcinogenic risk Population South Baikal region

Olefin Polymerization Behavior of Titanium(Iv) Complexes with Fluorinated and Non-fluorinated Aliphatic Phenoxyimine Ligands

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Chinese Journal of Polymer Science 2024年第1期42卷 52-62,I0007页

作者： vladislav A.Tuskaev Kasim F.Magomedov Svetlana Ch.Gagieva Dmitry A.Kurmaev Yulia v.Nelyubina Evgenii K.Golubev Maria D.Evseeva viktor G.vasil'ev Galina G.Nikiforova Mikhail I.Buzin vyacheslav S.Bogdanov Boris M.Bulychev Department of Chemistry M.V.Lomonosov Moscow State UniversityMoscow 119992Russian Federation A.N.Nesmeyanov Institute of Organoelement Compounds Russian Academy of SciencesMoscow119991Russian Federation Enikolopov Institute of Synthetic Polymer Materials Russian Academy of SciencesMoscow 117393Russian Federation

A series of Ti(Ⅳ) dichloride and dialkoxide com plexes with phenoxyimine ligands containing fluorinated and nonfluorinated aliphatic imine fragments have been *** molecular structures of complexes 1 and 4 were established by single-crystal X-ray diffraction *** complexes adopt a distorted octahedral coordination structure around the titanium atom and two oxygen atoms are situated in trans position while two nitrogen atoms and two outgoing ligands(Cl or iPrO) are situated in cis *** of activators(MMAO-12 and combinations Et_nAICl_(3-n)+Bu_(2)Mg) and outgoing ligand(Cl or iPrO) nature on the catalytic activity and properties of the resulting polymers was *** Ti complexes,despite the nature of the outgoing ligands(Cl or iPrO) in the presence of Al/Mg activators,was found to display a high ethylene polymerization activity in the range 1600-3830 kg_(polymer)·mol_(Ti)^(-1)·h^(-1)·atm^(-1) with a viscosity average molecular weight(M_v) value in the range 1.1×10~6-7.1×10~6 Dalton(Da).The resulting UHMWPE can be processed by a solventless method into high-strength and high-modulus oriented *** rheological characteristics of a polymer melt have been *** absence of a cross-over point did not allow to compare the values of the molecular weight distribution of polymers obtained on fluorinated and non-fluorinated pre-catalysts,however,the estimation of the entanglement density is in good agreement with the mechanical characteristics of oriented film *** activation with methylalumoxane,the activity of the com plexes decreased very significantly;however,a polymer with a molecular weight of about 12 million Da was *** the process of ethylene/octene-1 copolymerization,fluorine-containing precatalysts showed a clear advantage over non-fluorinated analogues both in activity and in comonomer content.

关键词： FI catalysts Titanium(Iv) (Co)polymerization Al/Mg co-catalyst Ultra-high molecular weight polyethylene

SARS-Cov-2 RBD and Its variants Can Induce Platelet Activation and Clearance:Implications for Antibody Therapy and vaccinations against COvID-19

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Research 2024年第3期2023卷 1-15页

作者： Xiaoying Ma Jady Liang Guangheng Zhu Preeti Bhoria Aron A.Shoara Daniel T.MacKeigan Christopher J.Khoury Sladjana Slavkovicl Lisha Lin Danielle Karakas Ziyan Chen viktor Prifti Zhenze Liu Chuanbin Shen Yuchong Li Cheng Zhang Jiayu Dou Zack Rousseau Jiamin Zhang Tiffany Ni Xi Lei Pingguo Chen Xiaoyu Wu Hamed Shaykhalishahi Samira Mubareka Kim AConnelly Haibo Zhang Ori Rotstein Heyu Ni Department of Laboratory Medicine and Pathobiology University of TorontoTorontoONCanada Department of Laboratory Medicine Keenan Research Centre for Biomedical Science of St.Michael’s HospitalTorontoONCanada Toronto Platelet Immunobiology Group TorontoONCanada Department of Physiology University of TorontoTorontoONCanada CCOA Therapeutics Inc. TorontoONCanada Canadian Blood Services Centre for Innovation TorontoONCanada The State Key Laboratory of Respiratory Disease Guangzhou Institute of Respiratory DiseaseThe First Affiliated Hospital of Guangzhou Medical UniversityGuangzhouGuangdongChina Department of Laboratory Medicine The Second Affliated Hospital of Guangzhou University of Chinese MedicineGuangzhouChina Advanced Pharmaceutics&Drug Delivery Laboratory Leslie Dan Faculty of PharmacyUniversity of TorontoTorontoONCanada Department of Medical Microbiology and Infectious Disease Sunnybrook Health Science CentreToronto ONCanada Department of Medicine University of TorontoTorontoONCanada Division of Cardiology.St.Michael's Hospital TorontoONCanada Department of Anesthesiology and Pain Medicine and Division of Critical Care Medicine University of TorontoTorontoONCanada interdepartmental Division of Critical Care Medicine University of TorontoTorontoONCanada Department of Surgery University of Toronto TorontoONCanada.

The COvID-19 pandemic caused by SARS-Cov-2 virus is an ongoing global health *** cases of COvID-19 and the rare cases of COvID-19 vaccine-induced-thrombotic-thrombocytopenia(vITT)are both associated with thrombosis and thrombocytopenia;however,the underlying mechanisms remain inadequately *** infection and vaccination utilize the spike protein receptor-binding domain(RBD)of *** found that intravenous injection of recombinant RBD caused significant platelet clearance in *** investigation revealed the RBD could bind platelets,cause platelet activation,and potentiate platelet aggregation,which was exacerbated in the Delta and Kappa *** RBD–platelet interaction was partially dependent on theβ3 integrin as binding was significantly reduced inβ3−/−***,RBD binding to human and mouse platelets was significantly reduced with relatedαIIbβ3 antagonists and mutation of the RGD(arginine-glycine-aspartate)integrin binding motif to RGE(arginine-glycine-glutamate).We developed anti-RBD polyclonal and several monoclonal antibodies(mAbs)and identified 4F2 and 4H12 for their potent dual inhibition of RBD-induced platelet activation,aggregation,and clearance in vivo,and SARS-Cov-2 infection and replication in vero E6 *** data show that the RBD can bind platelets partially thoughαIIbβ3 and induce platelet activation and clearance,which may contribute to thrombosis and thrombocytopenia observed in COvID-19 and *** newly developed mAbs 4F2 and 4H12 have potential not only for diagnosis of SARS-Cov-2 virus antigen but also importantly for therapy against COvID-19.

关键词： Antibody diagnosis vaccine

Desorption isotherms and isosteric heat of anaerobic fermentation residues

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Chinese Journal of Chemical Engineering 2019年第10期27卷 2510-2517页

作者： Tibor Poós viktor Szabó Department of Building Services and Process Engineering Faculty of Mechanical EngineeringBudapest University of Technology and EconomicsBertalan Lajos u.4-6H-1111 BudapestHungary

This paper presents the equilibrium desorption isotherms and the isosteric heat of sorption of a mixture containing mechanically dewatered fermentation residue(obtained from a blend of chicken,swine and cattle manure)used in biogas plants and corn spoiled silage in a ratio of 2:*** moisture desorption isotherms of the fermentation residue were determined at 32°C,40°C and 80°C and in the relative humidity range of 0.057/1 using static gravimetric *** equations were used to analyze the desorption data of Modified Henderson,Modified Halsey,Modified Oswin,Modified Chung–Pfost and Modified GAB *** constants of the model equations were calculated by non-linear regression *** Modified Henderson model fitted to the desorption isotherm data *** the proposed function,the final moisture content of the material can be determined as long as it can be dried in infinite time with the drying gas in the given *** isosteric heat of desorption was calculated by using the Modified Henderson model in the studied temperature range based on the Clausius–Clapeyron *** isosteric heat varied between 46 k J·mol-1 and 67 k J·mol-1 at moisture levels 1.91 b Xe<4.05 kgH2O·kgdP-1 for the material.

关键词： Desorption Equilibrium Model Measurement Isosteric heat

Mechanism of the Initial Stage of Thermal Decomposition of Nitroguanidine

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火炸药学报 2023年第1期46卷 31-40页

作者： Boris E.Krisyuk Danila A.Markin Timofey M.Sypko viktor v.Zakharov Nikita v.Chukanov Boris L.Korsunskiy Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry Russian Academy of Sciences142432prosp.Academician Semenov1ChernogolovkaMoscow RegionRussia Plekhanov Russian University of Economics Department of Chemistry and Physics36 Stremyanny laneMoscow 117997Russia Lomonosov Moscow State University Faculty of Fundamental Physical and Chemical engineeringGSP-11 Leninskie Goryp.51Moscow 119991Russia N.N.Semenov Federal Research Center for Chemical Physics Russian Academy of Science 4 Kosygina StreetBuilding 1Moscow 119991Russia

A theoretical and experimental study of the thermal decomposition of nitroguanidine(NQ) has been carried out. various thermolysis channels were studied by quantum chemistry methods at the CCSD(or DLPNO-CCSD) level using the aug-cc-pvDZ basis set. It is shown that the lowest activation enthalpies(170-180kJ/mol) are characteristic of the reactions of NO2abstraction from the initial NQ and the reaction channel with the transfer of oxygen from the nitro group to carbon in the limiting stage. Additionally, the thermolysis of NQ was studied experimentally in a nonisothermal mode with heating rates from 1 to 10K/min. In these experiments, the weight loss of the sample, thermal effects, and mass spectra of the products were recorded. An analysis of the experimental data confirmed the results of a theoretical study of the mechanism of thermal decomposition of NQ. The main thermolysis products are N2O, HNCO, NH3, and NO2, which fully corresponds to quantum chemical calculations.

关键词： primary thermolysis steps quantum-chemical calculation mass spectrometry DSC TG

Passive vectoring of entomopathogenic fungus Beauveria bassiana among the wax moth Galleria mellonella larvae by the ectoparasitoid Habrobracon hebetor females

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Insect Science 2018年第4期25卷 643-654页

作者： vadim Yu. Kryukov Natalia A. Kryukova Maksim v. Tyurin Olga N. Yaroslavtseva viktor v. Glupov Institute of Systematics and Ecology of Animals Siberian Branch of Russian Academy of Science Novosibirsk Russia

Females of the ectoparasitoid Habrobracon hebetor attack and envenomate numerous host individuals during oviposition. The vectoring of the entomopathogenic fungus Beauveria bassiana during the adhesion stage by ectoparasitoid females among the wax moth larvae Galleria mellonella was explored under laboratory conditions. vectoring occurred both from infected parasitoids to wax moth larvae and from infected to healthy wax moth larvae by parasitoids. The efficacy of vectoring in both cases was dose dependent. Parasitoid females were unable to recognize infected larvae in a labyrinth test. In addition, the presence of H. hebetor females significantly （1.5-13 fold） increased the mycoses level in clusters of G. mellonella, with 40% of the larvae infected with ftmgal conidia. Envenomation by H. hebetor increased conidia germination on the cuticles of the wax moth larvae by 4.4 fold. An enhanced germination rate （2 fold） was registered in the n- hexane epicuticular extract of envenomated larvae compared to that of healthy larvae. Both envenomation and mycoses enhanced the phenoloxidase （PO） activity in the integument of G. mellonella and, in contrast, decreased the encapsulation rate in hemolymphs. We hypothesize that changes in the integument property and inhibition of cellular immunity provide the highest infection efficacy of entomopathogenic fungi with H. hebetor.

关键词： Galleria mellonella immunity integuments mycoses parasitoid vectoring

Structure,magnetic and adsorption properties of novel FePt/h-BN heteromaterials

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Nano Research 2023年第1期16卷 1473-1481页

作者： Anton S.Konopatsky vladislava v.Kalinina Alena S.Savchenko Denis.v.Leybo Ekaterina v.Sukhanova viktor S.Baidyshev Zakhar I.Popov Andrey v.Bondarev Josef Polčák Dmitry v.Shtansky National University of Science and Technology(MISIS) Leninskiy prospect 4Moscow119049Russia Emanuel Institute of Biochemical Physics RAS Kosygina 4Moscow119334Russia Katanov Khakas State University 90 Lenin pr.655017 AbakanRussia Plekhanov Russian University of Economics 36 Stremyanny per.Moscow 117997Russia Department of Control Engineering Faculty of Electrical EngineeringCzech Technical University in PragueTechnicka 2Prague 16627Czech Republic CEITEC-Central European Institute of Technology Brno University of TechnologyPurkyňova 123Brno 61200 BrnoCzech Republic

Nanomaterials with high specific surface area and high absorption capacity are attracting increased interest aimed at imparting the desired magnetic *** work is devoted to the study of the effect of heat treatment in a hydrogen atmosphere on the microstructure,adsorption and magnetic properties of heterogeneous FePt/h-BN *** via the polyol process,FePt nanoparticles(NPs)had a sizever the surface of hexagonal boron nitride(h-BN)*** temperature-activated fcc→fct phase transformation in ultrafine FePt NPs has been well *** NPs act as active centers dissociating H2 molecules and transfer adsorbed hydrogen atoms to the *** functional theory(DFT)calculations also indicate that the h-BN substrate can absorb hydrogen adsorbed on the FePt *** hydrogen circulation in the FePt/h-BN system promoted the fcc→fct phase transformation and allowed to control the magnetic ***/h-BN nanomaterials also exhibited a high adsorption capacity with respect to various organic dyes.

关键词： FePt/h-BN nanomaterials polyol synthesis phase transformations magnetic properties adsorption

Propagation of vibrations in thawing deep seasonally frozen soils in railway subgrade

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Research in Cold and Arid Regions 2015年第5期7卷 534-540页

作者： Gennady M.Stoyanovich viktor v.Pupatenko Transport Construction Institute Department of Railway Track and Railway Engineering Far Eastern State Transport University

In this study, in-situ testing results are given, and the analytical relationship of the vibrations＇ amplitudes inside an em- bankment by the thawing of the subgrade surface of seasonably deep frozen soils is provided. The peculiarities of the vi- bration waves＇ propagation during the springtime thawing of soils compared to those during the summertime period and the correlation of the vibrations with the under-rail basement moduln~ nf ala^tieitv nro dofinod

关键词： railroad subgrade vibrational force deep seasonable frost