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  1. Article ; Online: Low-cost electron detector for scanning electron microscope.

    Vlasov, Evgenii / Denisov, Nikita / Verbeeck, Johan

    HardwareX

    2023  Volume 14, Page(s) e00413

    Abstract: Electron microscopy is an indispensable tool for the characterization of (nano) materials. Electron microscopes are typically very expensive and their internal operation is often shielded from the user. This situation can provide fast and high quality ... ...

    Abstract Electron microscopy is an indispensable tool for the characterization of (nano) materials. Electron microscopes are typically very expensive and their internal operation is often shielded from the user. This situation can provide fast and high quality results for researchers focusing on e.g. materials science if they have access to the relevant instruments. For researchers focusing on technique development, wishing to test novel setups, however, the high entry price can lead to risk aversion and deter researchers from innovating electron microscopy technology further. The closed attitude of commercial entities about how exactly the different parts of electron microscopes work, makes it even harder for newcomers in this field. Here we propose an affordable, easy-to-build electron detector for use in a scanning electron microscope (SEM). The aim of this project is to shed light on the functioning of such detectors as well as show that even a very modest design can lead to acceptable performance while providing high flexibility for experimentation and customization.
    Language English
    Publishing date 2023-03-10
    Publishing country England
    Document type Journal Article
    ISSN 2468-0672
    ISSN (online) 2468-0672
    DOI 10.1016/j.ohx.2023.e00413
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: High-Throughput Morphological Chirality Quantification of Twisted and Wrinkled Gold Nanorods.

    Vlasov, Evgenii / Heyvaert, Wouter / Ni, Bing / Van Gordon, Kyle / Girod, Robin / Verbeeck, Johan / Liz-Marzán, Luis M / Bals, Sara

    ACS nano

    2024  

    Abstract: Chirality in gold nanostructures offers an exciting opportunity to tune their differential optical response to left- and right-handed circularly polarized light, as well as their interactions with biomolecules and living matter. However, tuning and ... ...

    Abstract Chirality in gold nanostructures offers an exciting opportunity to tune their differential optical response to left- and right-handed circularly polarized light, as well as their interactions with biomolecules and living matter. However, tuning and understanding such interactions demands quantification of the structural features that are responsible for the chiral behavior. Electron tomography (ET) enables structural characterization at the single-particle level and has been used to quantify the helicity of complex chiral nanorods. However, the technique is time-consuming and consequently lacks statistical value. To address this issue, we introduce herein a high-throughput methodology that combines images acquired by secondary electron-based electron beam-induced current (SEEBIC) with quantitative image analysis. As a result, the geometric chirality of hundreds of nanoparticles can be quantified in less than 1 h. When combining the drastic gain in data collection efficiency of SEEBIC with a limited number of ET data sets, a better understanding of how the chiral structure of individual chiral nanoparticles translates into the ensemble chiroptical response can be reached.
    Language English
    Publishing date 2024-04-26
    Publishing country United States
    Document type Journal Article
    ISSN 1936-086X
    ISSN (online) 1936-086X
    DOI 10.1021/acsnano.4c02757
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: The Ferroelectric Domain Structures Induced by Electron Beam Scanning in Lithium Niobate.

    Vlasov, Evgeny / Chezganov, Dmitry / Chuvakova, Maria / Shur, Vladimir Ya

    Scanning

    2018  Volume 2018, Page(s) 7809826

    Abstract: Ferroelectric domain structure has been formed under the action of electron beam scanning in congruent lithium niobate single crystal covered by surface dielectric layer. The obtained types of the domain patterns have been considered as subsequent stages ...

    Abstract Ferroelectric domain structure has been formed under the action of electron beam scanning in congruent lithium niobate single crystal covered by surface dielectric layer. The obtained types of the domain patterns have been considered as subsequent stages of domain structure evolution. The dependence on irradiated charge density of domain density, length, and period of domain rays and stripe domain width was used for characterization of the domain structure evolution. The threshold irradiated charge density necessary for the formation of solid stripe domain has been revealed. All obtained results have been discussed in terms of kinetic approach based on the analogy between domain structure evolution and first-order phase transition.
    Language English
    Publishing date 2018
    Publishing country England
    Document type Journal Article
    ZDB-ID 391900-6
    ISSN 1932-8745 ; 0161-0457
    ISSN (online) 1932-8745
    ISSN 0161-0457
    DOI 10.1155/2018/7809826
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 3871: Show issues Location:
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    Jg. 1995 - 2021: Lesesall (2.OG)
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  4. Article ; Online: Development of a two-channel system for monitoring the mirror elements of the Millimetron space observatory.

    Zavyalov, P S / Makarov, S N / Smirnov, A V / Fedorchuk, S D / Stupak, M F / Verhoglyad, A G / Elesin, A G / Zavyalova, M A / Kravchenko, M S / Skokov, D V / Vlasov, E V / Ermolenko, A V

    Applied optics

    2022  Volume 61, Issue 2, Page(s) 588–596

    Abstract: The paper presents the results of the development of an onboard two-stage telescope monitoring (control) system of the Millimetron space observatory. A 3D laser scanner is used for the preliminary inspection of the reflector elements, and an image ... ...

    Abstract The paper presents the results of the development of an onboard two-stage telescope monitoring (control) system of the Millimetron space observatory. A 3D laser scanner is used for the preliminary inspection of the reflector elements, and an image analyzer based on the Foucault knife method is used for the final one. The results of the calculation and modeling of the monitoring system for tuning the telescope elements into space are presented. The signals formed in the system are calculated, including using data on the actual shape of the manufactured mirror elements. Estimates of the expected measurement accuracy are given, and the test results of the developed system are presented.
    Language English
    Publishing date 2022-02-21
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4522
    ISSN (online) 1539-4522
    DOI 10.1364/AO.441372
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: [ROLE OF ANIMALS AND HUMAN BEINGS IN THE SPREAD OF TRICHINOSIS IN THE KURSK REGION].

    Vagin, N A / Malysheva, N S / Samofalova, N A / Vlasov, E A

    Meditsinskaia parazitologiia i parazitarnye bolezni

    2015  , Issue 4, Page(s) 26–30

    Abstract: Trichinosis is natural focal invasion in the Kursk Region. Porkworms (Trichinella) circulate in natural biocenoses among wild carnivorous mammals, wild boars, and rodents. Trichinosis cases are recorded in synanthropic animals. Carnivorous mammals form ... ...

    Abstract Trichinosis is natural focal invasion in the Kursk Region. Porkworms (Trichinella) circulate in natural biocenoses among wild carnivorous mammals, wild boars, and rodents. Trichinosis cases are recorded in synanthropic animals. Carnivorous mammals form the basis for the parasitic system of trichinosis. The animals are infected with Trichinella through carnivorism, necrophagy, and cannibalism. The transport Trichinella vectors, necrophagous insects, naturally play an insignificant role-in the spread of trichinosis. Trichinella infection in animals occurs more commonly through necrophagia and cannibaism during winter months. Not only animals, but also man, play a great role in the spread of trichinosis. Infested wild and synanthropic aninals inhabiting the Kursk Region may carry the risk for Trichinella infection in the population.
    MeSH term(s) Animals ; Animals, Wild/classification ; Animals, Wild/parasitology ; Humans ; Mammals/parasitology ; Russia ; Trichinella/pathogenicity ; Trichinellosis/epidemiology ; Trichinellosis/parasitology ; Trichinellosis/transmission
    Language Russian
    Publishing date 2015-10
    Publishing country Russia (Federation)
    Document type English Abstract ; Journal Article
    ZDB-ID 416156-7
    ISSN 0025-8326
    ISSN 0025-8326
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.B 749: Show issues Location:
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  6. Article ; Online: Geographical distribution and hosts of the cestode Paranoplocephala omphalodes (Hermann, 1783) Lühe, 1910 in Russia and adjacent territories.

    Vlasenko, Pavel / Abramov, Sergey / Bugmyrin, Sergey / Dupal, Tamara / Fomenko, Nataliya / Gromov, Anton / Zakharov, Eugeny / Ilyashenko, Vadim / Kabdolov, Zharkyn / Tikunov, Artem / Vlasov, Egor / Krivopalov, Anton

    Parasitology research

    2019  Volume 118, Issue 12, Page(s) 3543–3548

    Abstract: Paranoplocephala omphalodes is a widespread parasite of voles. Low morphological variability within the genus Paranoplocephala has led to erroneous identification of P. omphalodes a wide range of definitive hosts. The use of molecular methods in the ... ...

    Abstract Paranoplocephala omphalodes is a widespread parasite of voles. Low morphological variability within the genus Paranoplocephala has led to erroneous identification of P. omphalodes a wide range of definitive hosts. The use of molecular methods in the earlier investigations has confirmed that P. omphalodes parasitizes four vole species in Europe. We studied the distribution of P. omphalodes in Russia and Kazakhstan using molecular tools. The study of 3248 individuals of 20 arvicoline species confirmed a wide distribution of P. omphalodes. Cestodes of this species were found in Microtus arvalis, M. levis, M. agrestis, Arvicola amphibius, and also in Chionomys gud. Analysis of the mitochondrial gene cox1 variability revealed a low haplotype diversity in P. omphalodes in Eurasia.
    MeSH term(s) Animals ; Arvicolinae/classification ; Arvicolinae/parasitology ; Cestoda/classification ; Cestoda/genetics ; Cestoda/isolation & purification ; Cestoda/physiology ; Cestode Infections/parasitology ; Cestode Infections/veterinary ; Genes, Mitochondrial ; Host Specificity ; Kazakhstan ; Phylogeny ; Rodent Diseases/parasitology ; Russia
    Language English
    Publishing date 2019-11-06
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 284966-5
    ISSN 1432-1955 ; 0932-0113 ; 0044-3255
    ISSN (online) 1432-1955
    ISSN 0932-0113 ; 0044-3255
    DOI 10.1007/s00436-019-06462-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Uh II Zs.124: Show issues Location:
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  7. Book: STIC - novyj ėlektromagnitnyj kalorimetr v oblasti malych uglov ustanovki DELPHI

    Vlasov, E. V

    (IFVĖ ; 96-14)

    1996  

    Title variant STIC, the new DELPHI very forward electromagnetic calorimeter
    Author's details E. V. Vlasov
    Series title IFVĖ ; 96-14
    Language Russian
    Size 20 S, graph. Darst
    Publishing place Protvino
    Document type Book
    Note In kyrill. Schr
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  8. Book ; Audio / Video: Osnovnye problemy aėroakustiki

    Vlasov, E. V

    (Trudy Centralʹnogo Aėrogidrodinamičeskogo Instituta im. prof. N. E. Žukovskogo ; 2614)

    1996  

    Title variant Principal problems of aeroacoustics
    Author's details E. V. Vlasov
    Series title Trudy Centralʹnogo Aėrogidrodinamičeskogo Instituta im. prof. N. E. Žukovskogo ; 2614
    Language Russian
    Size 1 Mikrofilm
    Publisher Izdat. Otdel CAGI
    Publishing place Moskva
    Document type Book ; Audio / Video
    Note In kyrill. Schr. ; Engl. Zsfassung u.d.T.: Principal problems of aeroacoustics
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  9. Book: Issledovanie vlijanija materiala jazyka radialʹnogo ventiljatora na ego šum i ėkonomičnostʹ

    Vlasov, E. N / Culimov, S. V / Ormenʹo Valeriano, M. A

    (Deponirovannaja naučnaja rabota / Vserossijskij Institut Naučnoj i Techničeskoj Informacii ; 1997,2091)

    1997  

    Author's details E. N. Vlasov, M. A. Ormenʹo Valeriano, S. V. Culimov
    Series title Deponirovannaja naučnaja rabota / Vserossijskij Institut Naučnoj i Techničeskoj Informacii ; 1997,2091
    Language Russian
    Size 6 Bl
    Publishing place Moskva
    Document type Book
    Note In kyrill. Schr
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  10. Article: The morphology of the virus granules of the beet armyworm Laphygma exigua

    Musamukhamedova, E.B / Khel'vas, E.G / Vlasov, E.G

    Doklady Akademii nauk UzSSR = 1974, 4

    1974  

    Title variant Morphology of the virus granules of the beet armyworm Laphygma exigua [Biological control]
    Keywords biological control
    Language Russian
    Size p. 48-50.
    Document type Article
    Note In Russian. ; Title in original language could not be transcribed.
    ISSN 0134-4307
    Database NAL-Catalogue (AGRICOLA)

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