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Influence of an irradiation of a liquid phase by nanosecond electromagnetic impulses (NEMI) on properties of metals and alloys

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Rare Metals 2007年第S1期26卷 14-19页

作者： RI E H RI Hosen dorofeev S V KUHARENKO E B Department of Foundry and Process Metallurgy Metrology and Material Inspection LaboratoryPacific National University

The results of research on influence of an irradiation of a liquid phase by nanosecond electromagnetic impulses(NEMI) on processes of crystallization and structurization,physicomechanical and operational properties of... 详细信息

关键词： generator NEMI nanosecond electromagnetic impulses corrosion resistant heat resistance

Previous hepatitis B viral infection–an underestimated cause of pancreatic cancer

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World Journal of Gastroenterology 2022年第33期28卷 4812-4822页

作者： Sergey Batskikh Sergey Morozov Alexey dorofeev Zanna Borunova Dmitry Kostyushev Sergey Brezgin Anastasiya Kostyusheva Vladimir Chulanov Department of Hepatology Moscow Clinical Scientific Center N.A.A.S.LoginovMoscow 111123Russia Department of Gastroenterology Hepatology and NutritionFederal Research Center of NutritionBiotechnology and Food SafetyMoscow 115446Russia Department of Scientific and Clinical Laboratory Research Moscow Clinical Scientific Center N.A.A.S.LoginovMoscow 111123Russia Laboratory of Genetic Technologies Sechenov UniversityMoscow 119435Russia Division of Biotechnology Scientific Center for Genetics and Life SciencesSirius University of Science and TechnologySochi 354340Russia Laboratory of Genetic Technologies and Translational Research National Medical Research Center for Tuberculosis and Infectious Diseases of Ministry of Health of RussiaMoscow 127994Russia

BACKGROUND The etiology of pancreatic cancer remains unclear. This limits the possibility of prevention and effective treatment. Hepatitis B virus(HBV) is responsible for the development of different types of cancer, but its role in pancreatic cancer is still being *** To assess the prevalence of previous HBV infection and to identify viral biomarkers in patients with pancreatic ductal adenocarcinoma(PDAC) to support the role of the virus in etiology of this *** The data of 130 hepatitis B surface antigen-negative subjects were available for the final analysis,including 60 patients with PDAC confirmed by cytology or histology and 70 sex-and age-matched controls. All the participants were tested for HBV biomarkers in blood [antibody to hepatitis B core antigen(anti-HBc), antibody to hepatitis B surface antigen(anti-HBs) and HBV DNA], and for those with PDAC, biomarkers in resected pancreatic tissues were tested(HBV DNA, HBV pregenomic RNA and covalently closed circular DNA). We performed immunohistochemistry staining of pancreatic tissues for hepatitis B virus X antigen and Ki-67 protein. Non-parametric statistics were used for the *** Anti-HBc was detected in 18/60(30%) patients with PDAC and in 9/70(13%) participants in the control group(P = 0.029). Accordingly, the odds of PDAC in anti-HBc-positive subjects were higher compared to those with no previous HBV infection(odds ratio: 2.905, 95% confidence interval: 1.191-7.084, standard error 0.455). HBV DNA was detected in 8 cases of PDAC and in 6 of them in the pancreatic tumor tissue samples only(all patients were anti-HBc positive). Blood HBV DNA was negative in all subjects of the control group with positive results of the serum anti-HBc test. Among 9 patients with PDAC, 5 revealed signs of replicative competence of the virus(covalently closed circular DNA with or without pregenomic RNA) in the pancreatic tumor tissue samples. Hepatitis B virus X antigen expression and active cell

关键词： Hepatitis B virus Previous hepatitis B Occult hepatitis B virus infection Pancreatic cancer Pancreatic ductal adenocarcinoma

Direct patterning of reduced graphene oxide/graphene oxide memristive heterostructures by electron-beam irradiation

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Journal of Materials Science & Technology 2020年第3期38卷 237-243页

作者： Olesya O.Kapitanova Evgeny V.Emelin Sergey G.dorofeev Pavel V.Evdokimov Gennady N.Panin Youngmin Lee Sejoon Lee Lomonosov Moscow State University Leninskie gory119991 MoscowRussia Moscow Institute of Physics and Technology 9 Institutskiy per.DolgoprudnyMoscow Region141701Russia Institute of Microelectronics Technology and High-Purity Materials Russian Academy of SciencesChernogolovkaMoscow district142432Russia Nano Information Technology Academy Dongguk University-SeoulSeoul 04620Korea Quantum-Functional Semiconductor Research Center Dongguk University-SeoulSeoul 04620Korea Department of Semiconductor Science Dongguk University-SeoulSeoul 04620Korea

Memristive heterostructures,composed of reduced graphene oxide with different degree of reduction,were demonstrated through a simple method of‘direct electron-beam writing’on graphene *** with an electron beam at various doses and accelerating voltages made it possible to define highand low-conductivity graphene-oxide *** electron beam-reduced graphene oxide/graphene oxide heterostructure clearly exhibited a nonlinear behavior and a well-controlled resistive switching characteristic at a low operating-voltage range(<1 V).The proposed memristive heterostructures are promising for highly-efficient digital storage and information process as well as for analogous neuromorphic computations.

关键词： Electron beam irradiation Reduced graphene oxide Graphene oxide Memristive heterostructure

Predicting the non-breeding distributions of the two Asian subspecies of Black-tailed Godwit using morphological information

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Avian Research 2023年第1期14卷 1-6页

作者： Bing-Run Zhu Mo A.Verhoeven Chris J.Hassell Katherine K-S Leung Dmitry dorofeev Qiang Ma Krairat Eiamampai Jonathan T.Coleman Uchrakhzaya Tserenbat Gankhuyag Purev-Ochir David Li Zhengwang Zhang Theunis Piersma Conservation Ecology Group Groningen Institute for Evolutionary Life SciencesUniversity of Groningen9747AGthe Netherlands Key Laboratory for Biodiversity Science and Ecological Engineering College of Life SciencesBeijing Normal UniversityBeijing100875China Hunan Global Messenger Technology Co. LtdChangshaChangsha410205China Netherlands Institute of Ecology(NIOO-KNAW) 6708 PBWageningenthe Netherlands Department of Coastal Systems NIOZ Royal Netherlands Institute for Sea ResearchDen Burg1790 ABTexelthe Netherlands Global Flyway Network BroomeWestern Australia6725Australia Australasian Wader Studies Group Western Australia(north)Australia Hong Kong Waterbirds Ringing Group Mai Po Nature ReserveHongKongChina All-Russian Research Institute for Environmental Protection Moscow117628Russia Chongming Dongtan National Nature Reserve Shanghai202183China Department of National Park Wildlife and Plant ConservationMinistry of Natural Resource and EnvironmentBangkok10900Thailand Queensland Wader Study Group Brisbane4128Australia Mongolian Bird Conservation Center Ulaanbaatar210351Mongolia Sungei Buloh Wetland Reserve National Parks Board 718925Singapore CEAAF Centre for East Asian-Australasian Flyway Studies Beijing Forestry UniversityBeijing100083China

Until recently,Limosa limosa melanuroides was thought to be the only subspecies of Black-tailed Godwit in the East Asian-Australasian *** this reason,all previous occurrences and counts of Black-tailed Godwits in the flyway have been assigned to ***,a larger-bodied subspecies,bohaii,has recently been discovered in the *** a result,the occurrence of Black-tailed Godwits in the flyway needs to be reconsidered such that the specific distribution of each subspecies becomes *** this end,we developed a simple discriminant function to assign individuals to subspecies based on their bill and wing ***-validation with individuals known to be bohaii or melanuroides,based on molecular analysis,showed the developed function to be 97.7%*** applied to measurements of godwits captured at 22 sites across 9 countries in East-Southeast Asia and Australia,we found that bohaii and melanuroides occurred at most sites and overlapped in their distribution from Kamchatka to *** examined photos from all along the flyway to verify this surprising result,confirming that both subspecies co-occur in most *** on these results,we hypothesise that bohaii and melanuroides from the west of their breeding ranges mostly migrate over Chinese *** of both subspecies from the east of their ranges are expected to migrate along the Pacific *** encourage ringing groups in East-Southeast Asia and Australia to use this simple method to keep adding knowledge about Black-tailed Godwits in the East Asian-Australasian Flyway.

关键词： DFA Discriminant function analysis East Asian-Australasian Flyway Limosa limosa

Preparation of a spheroidized W-Cu pseudo-alloy micropowder with a sub-micrometer particle structure using plasma technology

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Transactions of Nonferrous Metals Society of China 2023年

作者： A.V. Samokhin N.V. Alekseev A.A. dorofeev A.A. Fadeev M.A. Sinayskiy I.D. Zavertiaev Y.V. Grigoriev Institute of Metallurgy and Materials Science， Russian Academy of Sciences 2. Federal Scientific Research Center "Crystallography and Photonics"， Russian Academy of Sciences

The possibility for obtaining of composite micropowders of the W-Cu system with spherical particles having sub-microscale/nanoscale internal structure was confirmed and studied using the complex multistage approach. Composite W-Cu nanoparticles with core–shell structure (W cores and Cu shells) were produced in plasmochemical synthesis by the first stage. Further spray-drying of the aqueous suspension of the W-Cu nanopowder with sucrose enabled the formation of 25–63 μm microgranules with a yield of 50%. The last step was treatment of the nanopowder microgranules by a thermal plasma jet， which ensured the production of dense spherical W-Cu particles. The final powder had a 90%–95% spheroidization degree， up to 8.1 g/cm3bulk density and a flowability of ～12 s/50 g. The content of impurities in the resulting spherical micropowder did not exceed 0.7 wt.% [O]， 0.02–0.2 wt.% [C] and 0.03-0.05 wt.% [H].

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阿穆尔公路变形演化的永久冻土因素分析(英文)

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黑龙江大学工程学报 2014年第3期5卷 127-132,146页

作者： dorofeev I.V. Litovko A.V. 俄罗斯科学院西伯利亚分院麦尔尼科夫冻土研究所

工程研究的主要目标是获得有关自然条件下季节融化层信息;找出下方道路路基冻土的组成和性质;研究堤岸基础土壤(解冻和冷冻)的热状况和识别配置技术以及融区的厚度;分析融区和道路变形之间的连接。阿穆尔公路的成岩基地研究采用了冻土... 详细信息

工程研究的主要目标是获得有关自然条件下季节融化层信息;找出下方道路路基冻土的组成和性质;研究堤岸基础土壤(解冻和冷冻)的热状况和识别配置技术以及融区的厚度;分析融区和道路变形之间的连接。阿穆尔公路的成岩基地研究采用了冻土地质工程监测手段。根据所获得的结果显示,多年冻土的自然技术动态区域概况已经形成。研究发现了永久冻土层的高含冰量和融区厚度的道路路堤高度,同时建立了底层土壤的组成和水含量的关系。相对于该地区的自然环境,指出了在自然条件下的全球区域气候变化中高含冰量冻土的大贯量。

关键词：工程地质监测永久冻土冻土季节融化层地面温度冻土的衰减工艺融区道路变形

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高酯化度的纤维素黄酸酯

广州化学 1982年第1期 76-77页

作者： V.A.Danilin V.A.Terenteva N.A.dorofeev A.T.Serkov 张灼怀

一些高酯化度的纤维素酯在一定的条件下可存在于液晶状态的溶液中,这对改进从这些溶液制得的粘胶丝的物理机械性能创造了先决条件。有意义的是研究高酯化度的纤维素二硫代碳酸酯即黄酸酯转变为液晶状态的可行性。实际上,制备高酯化度(γ... 详细信息

一些高酯化度的纤维素酯在一定的条件下可存在于液晶状态的溶液中,这对改进从这些溶液制得的粘胶丝的物理机械性能创造了先决条件。有意义的是研究高酯化度的纤维素二硫代碳酸酯即黄酸酯转变为液晶状态的可行性。实际上,制备高酯化度(γ)纤维素黄酸酯的现行方法是最简单的。但是,以过量碱附加黄化的方法研究甚少,因此,提出用此法时的各种工艺参数对γ影响的研究。

关键词：纤维素化度黄酸黄化粘胶