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  1. Article ; Online: Design space exploration of flow diverter hydraulic resistance parameters in sidewall intracranial aneurysms.

    Sándor, Levente / Paál, György

    Computer methods in biomechanics and biomedical engineering

    2023  , Page(s) 1–12

    Abstract: Intracranial aneurysms are nowadays treated with endovascular flow diverter devices to avoid sac rupture. This study explores how different linear and quadratic hydrodynamic resistance parameters reduce the flow in the sac for five patient-specific ... ...

    Abstract Intracranial aneurysms are nowadays treated with endovascular flow diverter devices to avoid sac rupture. This study explores how different linear and quadratic hydrodynamic resistance parameters reduce the flow in the sac for five patient-specific sidewall aneurysms.The 125 performed blood flow simulations included the stents using a Darcy-Forcheimer porous layer approach based on real-life stent characteristics. Time- and space-averaged velocity magnitudes were strongly affected by the linear coefficient with a power-law relationship. Quadratic coefficients alter the flow in a minor way due to the low-velocity levels in the aneurysm sac and neck region.
    Language English
    Publishing date 2023-05-25
    Publishing country England
    Document type Journal Article
    ZDB-ID 2071764-7
    ISSN 1476-8259 ; 1025-5842
    ISSN (online) 1476-8259
    ISSN 1025-5842
    DOI 10.1080/10255842.2023.2215369
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 6374: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

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  2. Article ; Online: Comparison of Flow Reduction Efficacy of Nominal and Oversized Flow Diverters Using a Novel Measurement-assisted in Silico Method.

    Csippa, Benjamin / Sándor, Levente / Závodszky, Gábor / Szikora, István / Paál, György

    Clinical neuroradiology

    2024  

    Abstract: Purpose: The high efficacy of flow diverters (FD) in the case of wide-neck aneurysms is well demonstrated, yet new challenges have arisen because of reported posttreatment failures and the growing number of new generation of devices. Our aim is to ... ...

    Abstract Purpose: The high efficacy of flow diverters (FD) in the case of wide-neck aneurysms is well demonstrated, yet new challenges have arisen because of reported posttreatment failures and the growing number of new generation of devices. Our aim is to present a measurement-supported in silico workflow that automates the virtual deployment and subsequent hemodynamic analysis of FDs. In this work, the objective is to analyze the effects of FD deployment variability of two manufacturers on posttreatment flow reduction.
    Methods: The virtual deployment procedure is based on detailed mechanical calibration of the flow diverters, while the flow representation is based on hydrodynamic resistance (HR) measurements. Computational fluid dynamic simulations resulted in 5 untreated and 80 virtually treated scenarios, including 2 FD designs in nominal and oversized deployment states. The simulated aneurysmal velocity reduction (AMVR) is correlated with the HR values and deployment scenarios.
    Results: The linear HR coefficient and AMVR revealed a power-law relationship considering all 80 deployments. In nominal deployment scenarios, a significantly larger average AMVR was obtained (60.3%) for the 64-wire FDs than for 48-wire FDs (51.9%). In oversized deployments, the average AMVR was almost the same for 64-wire and 48-wire device types, 27.5% and 25.7%, respectively.
    Conclusion: The applicability of our numerical workflow was demonstrated, also in large-scale hemodynamic investigations. The study revealed a robust power-law relationship between a HR coefficient and AMVR. Furthermore, the 64 wire configurations in nominal sizing produced a significantly higher posttreatment flow reduction, replicating the results of other in vitro studies.
    Language English
    Publishing date 2024-04-23
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2234662-4
    ISSN 1869-1447 ; 0939-7116 ; 1869-1439
    ISSN (online) 1869-1447
    ISSN 0939-7116 ; 1869-1439
    DOI 10.1007/s00062-024-01404-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 3413: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  3. Article ; Online: Memory-friendly fixed-point iteration method for nonlinear surface mode oscillations of acoustically driven bubbles: from the perspective of high-performance GPU programming.

    Kalmár, Péter / Hegedűs, Ferenc / Nagy, Dániel / Sándor, Levente / Klapcsik, Kálmán

    Ultrasonics sonochemistry

    2023  Volume 99, Page(s) 106546

    Abstract: A fixed-point iteration technique is presented to handle the implicit nature of the governing equations of nonlinear surface mode oscillations of acoustically excited microbubbles. The model is adopted from the theoretical work of Shaw [1], where the ... ...

    Abstract A fixed-point iteration technique is presented to handle the implicit nature of the governing equations of nonlinear surface mode oscillations of acoustically excited microbubbles. The model is adopted from the theoretical work of Shaw [1], where the dynamics of the mean bubble radius and the surface modes are bi-directionally coupled via nonlinear terms. The model comprises a set of second-order ordinary differential equations. It extends the classic Keller-Miksis equation and the linearized dynamical equations for each surface mode. Only the implicit parts (containing the second derivatives) are reevaluated during the iteration process. The performance of the technique is tested at various parameter combinations. The majority of the test cases needs only a single reevaluation to achieve 10
    Language English
    Publishing date 2023-08-04
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1208333-1
    ISSN 1873-2828 ; 1350-4177
    ISSN (online) 1873-2828
    ISSN 1350-4177
    DOI 10.1016/j.ultsonch.2023.106546
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 4441: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  4. Book ; Conference proceedings: GABA outside the CNS

    Erdö, Sándor L.

    [proceedings of the International Symposium on Peripheral GABAergic Mechanisms, Rome, July 19 - 21, 1990]

    1992  

    Event/congress International Symposium on Peripheral GABAergic Mechanisms (1990, Rom)
    Author's details Sándor L. Erdö (ed.)
    Keywords Peripheres Nervensystem ; Aminobuttersäure
    Subject GABA ; Gamma-Aminobuttersäure ; PNS
    Size XIV, 298 S. : Ill., graph. Darst.
    Publisher Springer
    Publishing place Berlin u.a.
    Document type Book ; Conference proceedings
    HBZ-ID HT004169734
    ISBN 3-540-54532-8 ; 0-387-54532-8 ; 978-3-540-54532-3 ; 978-0-387-54532-5
    Database Catalogue ZB MED Medicine, Health

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    In stock of ZB MED Cologne/Königswinter

    Shelf markLoan statusLocation
    1992 A 2075 order for loan Magazin

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  5. Article ; Online: Analysis of diffuse scattering in electron diffraction data for the crystal structure determination of Pigment Orange 13, C

    Gorelik, Tatiana E / Bekő, Sàndor L / Teteruk, Jaroslav / Heyse, Winfried / Schmidt, Martin U

    Acta crystallographica Section B, Structural science, crystal engineering and materials

    2023  Volume 79, Issue Pt 2, Page(s) 122–137

    Abstract: The crystallographic study of two polymorphs of the industrial pyrazolone Pigment Orange 13 (P.O.13) is reported. The crystal structure of the β phase was determined using single-crystal X-ray analysis of a tiny needle. The α phase was investigated using ...

    Abstract The crystallographic study of two polymorphs of the industrial pyrazolone Pigment Orange 13 (P.O.13) is reported. The crystal structure of the β phase was determined using single-crystal X-ray analysis of a tiny needle. The α phase was investigated using three-dimensional electron diffraction. The electron diffraction data contain sharp Bragg reflections and strong diffuse streaks, associated with severe stacking disorder. The structure was solved by careful analysis of the diffuse scattering, and similarities of the unit-cell parameters with the β phase. The structure solution is described in detail and this provides a didactic example of solving molecular crystal structures in the presence of diffuse scattering. Several structural models were constructed and optimized by lattice-energy minimization with dispersion-corrected DFT. A four-layer model was found, which matches the electron diffraction data, including the diffuse scattering, and agrees with X-ray powder data. Additionally, five further phases of P.O.13 are described.
    Language English
    Publishing date 2023-02-24
    Publishing country England
    Document type Journal Article
    ZDB-ID 2020841-8
    ISSN 2052-5206 ; 1600-5740 ; 1600-8650 ; 2052-5192
    ISSN (online) 2052-5206 ; 1600-5740 ; 1600-8650
    ISSN 2052-5192
    DOI 10.1107/S2052520623000720
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Impairment of Mesenteric Perfusion as a Marker of Major Bleeding in Trauma Patients.

    Jávor, Péter / Donka, Tibor / Horváth, Tamara / Sándor, Lilla / Török, László / Szabó, Andrea / Hartmann, Petra

    Journal of clinical medicine

    2023  Volume 12, Issue 10

    Abstract: The majority of potentially preventable mortality in trauma patients is related to bleeding; therefore, early recognition and effective treatment of hemorrhagic shock impose a cardinal challenge for trauma teams worldwide. The reduction in mesenteric ... ...

    Abstract The majority of potentially preventable mortality in trauma patients is related to bleeding; therefore, early recognition and effective treatment of hemorrhagic shock impose a cardinal challenge for trauma teams worldwide. The reduction in mesenteric perfusion (MP) is among the first compensatory responses to blood loss; however, there is no adequate tool for splanchnic hemodynamic monitoring in emergency patient care. In this narrative review, (i) methods based on flowmetry, CT imaging, video microscopy (VM), measurement of laboratory markers, spectroscopy, and tissue capnometry were critically analyzed with respect to their accessibility, and applicability, sensitivity, and specificity. (ii) Then, we demonstrated that derangement of MP is a promising diagnostic indicator of blood loss. (iii) Finally, we discussed a new diagnostic method for the evaluation of hemorrhage based on exhaled methane (CH
    Language English
    Publishing date 2023-05-20
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2662592-1
    ISSN 2077-0383
    ISSN 2077-0383
    DOI 10.3390/jcm12103571
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Book: GABAergic mechanisms in the mammalian periphery

    Erdö, Sándor L.

    1986  

    Author's details ed.: Sándor L. Erdö
    Keywords GABA / physiology ; Receptors, GABA-A ; Aminobuttersäure ; Peripheres Nervensystem ; Säugetiere
    Subject Mammalia ; Säuger ; Säugetier ; PNS ; GABA ; Gamma-Aminobuttersäure
    Size XXII, 377 S. : Ill., graph. Darst.
    Publisher Raven Pr
    Publishing place New York
    Publishing country United States
    Document type Book
    HBZ-ID HT002848664
    ISBN 0-88167-193-2 ; 978-0-88167-193-3
    Database Catalogue ZB MED Medicine, Health

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    In stock of ZB MED Cologne/Königswinter

    Shelf markLoan statusLocation
    1986 A 3662 order for loan Magazin

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  8. Article: Methane Admixture Protects Liver Mitochondria and Improves Graft Function after Static Cold Storage and Reperfusion.

    Horváth, Tamara / Sándor, Lilla / Baráth, Bálint / Donka, Tibor / Baráth, Bence / Mohácsi, Árpád / Jász, Kurszán Dávid / Hartmann, Petra / Boros, Mihály

    Antioxidants (Basel, Switzerland)

    2023  Volume 12, Issue 2

    Abstract: Mitochondria are targets of cold ischemia-reperfusion (IR), the major cause of cell damage during static cold preservation of liver allografts. The bioactivity of methane ( ... ...

    Abstract Mitochondria are targets of cold ischemia-reperfusion (IR), the major cause of cell damage during static cold preservation of liver allografts. The bioactivity of methane (CH
    Language English
    Publishing date 2023-01-25
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2704216-9
    ISSN 2076-3921
    ISSN 2076-3921
    DOI 10.3390/antiox12020271
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Tachyporus nitidulus (Fabricius, 1781) (Coleoptera, Staphylinidae, Tachyporinae)

    Alexander B. Orfinger / Sandor L. Kelly

    Check List, Vol 13, Iss 6, Pp 921-

    first record from the state of Florida, USA

    2017  Volume 923

    Abstract: The range of the staphylinid beetle Tachyporus nitidulus (Fabricius, 1781) (Coleoptera, Staphylinidae, Tachyporinae) is extended to include the state of Florida, USA. The record is based on a single female specimen collected via Malaise trap in a rural ... ...

    Abstract The range of the staphylinid beetle Tachyporus nitidulus (Fabricius, 1781) (Coleoptera, Staphylinidae, Tachyporinae) is extended to include the state of Florida, USA. The record is based on a single female specimen collected via Malaise trap in a rural yard in Baker County, Florida in 2007.
    Keywords Biology (General) ; QH301-705.5
    Language English
    Publishing date 2017-12-01T00:00:00Z
    Publisher Pensoft Publishers
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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  10. Article: Tachyporus nitidulus (Fabricius, 1781) (Coleoptera, Staphylinidae, Tachyporinae): first record from the state of Florida, USA

    Orfinger, Alexander B. / Kelly, Sandor L.

    Check list. 2017 Dec. 08, v. 13, no. 6

    2017  

    Abstract: The range of the staphylinid beetle Tachyporus nitidulus (Fabricius, 1781) (Coleoptera, Staphylinidae, Tachyporinae) is extended to include the state of Florida, USA. The record is based on a single female specimen collected via Malaise trap in a rural ... ...

    Abstract The range of the staphylinid beetle Tachyporus nitidulus (Fabricius, 1781) (Coleoptera, Staphylinidae, Tachyporinae) is extended to include the state of Florida, USA. The record is based on a single female specimen collected via Malaise trap in a rural yard in Baker County, Florida in 2007.
    Keywords Malaise traps ; Tachyporus ; females ; Florida
    Language English
    Dates of publication 2017-1208
    Size p. 921-923.
    Publishing place Pensoft Publishers
    Document type Article
    ZDB-ID 2252867-2
    ISSN 1809-127X
    ISSN 1809-127X
    DOI 10.15560/13.6.921
    Database NAL-Catalogue (AGRICOLA)

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