Готові списки джерел за темами / Erythrocytes’ permittivity

Добірка наукової літератури з теми "Erythrocytes’ permittivity"

Автор: Grafiati
Опубліковано: 30 травня 2022
Оновлено: 31 травня 2022

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Статті в журналах з теми "Erythrocytes’ permittivity"

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Generalov, V. M., A. S. Safatov, M. V. Kruchinina, A. A. Gromov, G. A. Buryak, K. V. Generalov, and V. N. Kruchinin. "Dielectric properties of the human red blood cell." Izmeritel`naya Tekhnika, no. 7 (2020): 62–67. http://dx.doi.org/10.32446/0368-1025it.2020-7-62-67.

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Анотація:
The dielectric properties of the erythrocyte were studied. Experimental methods and results of measuring the dielectric properties of individual human erythrocyte are presented. The method is theoretically justified. It is established that values of the complex permittivity of the erythrocyte, capacitance, tangent of dielectric losses remains almost constant despite significant changes in conductivity, the content of NaCl of the cell suspension. These values reflect the stability of the studied parameters of erythrocytes under conditions of changes within a wide range of the environment in which the cells are located. Complex cell permittivity and cell dielectric loss tangent are promising parameters for objective diagnostics of human diseases. The introduction of measurements of cell permittivity and cell dielectric loss tangent into medical practice will probably allow us to characterize the process of individual cell self-regulation in more detail.
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Arkhypova, Kateryna, Pavlo Krasov, Anatolii Fisun, Andriy Nosatov, Volodymyr Lychko, and Volodymyr Malakhov. "Microwave dielectrometry as a tool for the characterization of blood cell membrane activity for in vitro diagnostics." International Journal of Microwave and Wireless Technologies 9, no. 8 (May 2, 2017): 1569–74. http://dx.doi.org/10.1017/s1759078717000411.

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This paper deals with the concept of microliter sensing of human blood samples by waveguide dielectrometry at microwave frequency (39.5 GHz). The methods, research protocol, and basic results derived from the permittivity measurements are presented. Here we summarize the results of our 5-year research on developing a multidisciplinary approach to the characterization of erythrocytes dielectric response, in parallel with biochemical studies of their receptor-membrane activity, within the scope of a case–control study for in vitro diagnostics of acute and chronic neurological conditions.
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Kohlsmann, Stephan, Matthias Hetscher, and Klaus Kramer. "Application of a Miniaturised Probe for the Acquisition of Dielectric Data in Living Systems." Zeitschrift für Naturforschung A 49, no. 12 (December 1, 1994): 1165–70. http://dx.doi.org/10.1515/zna-1994-1210.

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Abstract The complex permittivity ε* has been measured non-invasively in the cornea of two types of animal eyes and in erythrocyte suspensions in the frequency domain 1 ... 18,000 MHz. These measurements shall help to distinguish between eye diseases in a very early stage and to track the possible effect of “microthermics”, respectively. The analysis of the miniaturised probe used for the reflection method and the experimental set-up with its automatic scanning facility are presened.
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Bordi, Federico, Cesare Cametti, Francesco De Luca, Tommaso Gili, Roberta Misasi, Maurizio Sorice, Annapia Circella, and Tina Garofalo. "Structural Alteration of Erythrocyte Membrane during Storage: a Combined Electrical Conductometric and Flow-Cytometric Study." Zeitschrift für Naturforschung C 56, no. 9-10 (October 1, 2001): 857–64. http://dx.doi.org/10.1515/znc-2001-9-1030.

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AbstractAlterations in the electrical passive parameters of red blood cell membranes occurring during storage have been investigated by means of two different experimental approaches, i.e., radiowave dielectric spectroscopy measurements and flow-cytometric measurements. We observed a correlation between the appearance of phosphatidylserine molecules in the outer leaflet of the cell membrane and the occurrence of a change in the electrical passive membrane parameters. The electrical re-organization of the membrane, resulting in an increase of its conductivity and permittivity after 5 -7 days from blood storage, can be considered as a precursory event for the loss of asymmetry in the lipid distribution across red blood cell membrane.
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Батюк, Л. В., and Н. М. Кізілова. "Monitoring system of biophysical properties of the red blood cells of patients for medical diagnosis purposes." Системи обробки інформації, no. 3(162), (September 30, 2020): 13–20. http://dx.doi.org/10.30748/soi.2020.162.02.

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Анотація:
Modern medical diagnostics is impossible without high-tech means of collecting information about the patient's condition, in particular, the biochemical properties of blood and other tissues, physiological signals in the format of time series, and medical images as well. Extensive use of automatic methods of information processing and decision-making based on mathematical models, expert systems, and artificial intelligence is an integral part of the tomorrow’s medicine. Such approaches significantly increase the accuracy of diagnosis and the effectiveness of the prescribed treatment, but this requires the availability of properly structured databases with the results of both successful / unsuccessful treatments, and a complete set of necessary analyses and tests for each patient. This paper discusses the most important components of such database and public health monitoring system. The main issues are the standardization of data format, approaches, methods and laboratory equipment used to unify monitoring, diagnosis and control over the treatment. The importance of using additional physical parameters of blood cells and tissues to increase the efficiency of medical diagnostics with artificial intelligence is shown. The sedimentation curves corresponding to stable normal, stable increased and unstable erythrocyte aggregation rate are given. It is shown that the time to reach the maximum cell sedimentation rate can be calculated on a 2-phase model of blood suspension, indicators of which could be accumulated in the database, which will allow the extraction of additional diagnostic information using novel statistical and mathematical methods. Typical dependences of erythrocyte dielectric constant curves on temperature for oncology patients are given. It is shown that storage in the database the values of dielectric permittivity of red blood cells measured at different temperature and frequencies of electromagnetic fields applied in the dielectrometer, provides significant material for a more detailed study of the patterns of development of various diseases and finding the most sensitive indices for their timely detection.
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Gaur, Mulayam Singh, Dayal Saran, Rohan Sagar, Kamlesh Sisodia, and Karuna Gaur. "Influence of Silver Nanoparticles on Dielectric Properties of Human Blood." ECS Journal of Solid State Science and Technology, May 26, 2022. http://dx.doi.org/10.1149/2162-8777/ac73b1.

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Abstract The dielectric properties of human blood are studied using dielectric spectroscopy. The silver nanoparticles (AgNPs) of 50 nm were chemically synthesized using tri-sodium citrate as a reducing agent. Different amounts of AgNPs were mixed carefully in fresh human blood from a healthy person. The micrographs of blood were recorded before and after addition of nanoparticles. Micrograph shows the contraction of erythrocytes after injection of AgNPs. The contraction of erythrocytes increases with increase of AgNPs concentration. The observed permittivity, tangential loss, impedance decayed with frequency and then constant at higher frequency range. However, tangential loss and impedance shows S shape characteristics. We conclude that silver nanoparticles directly affects the dielectric parameters of human blood, that the effects are more relevant at frequencies below the MHz, and that the influence on the dielectric parameters is less with low concentration of AgNPs. The experimental finding of this heterogeneous system indicates α, β and Maxwell Wagner type of dispersion control the dielectric properties of whole human blood in the frequency range of 42Hz to 20 kHz at room temperature 30°C.
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Дисертації з теми "Erythrocytes’ permittivity"

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Soloshenko, E. N., A. K. Kondakova, N. V. Khmil, V. G. Kolesnikov, Z. M. Shevchenko, and T. P. Yarmak. "Erythrocytes’ permittivity for determination of sensitization to local anesthetics of amide and ether groups." Thesis, Yuriy Fedkovych Chernivtsi National University Chernivtsi, Ukraine, 2017. http://openarchive.nure.ua/handle/document/10458.

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Анотація:
The work presents results of experimental investigations of erythrocytes’ permittivity to the influence of local anesthetics amide and ether groups, since unclarity of the mechanisms of action of these drugs on molecular and cellular level remain and also serious allergic reactions in dentistry are observed. EHF-dielectrometry (K-band, 37,5 GHz) in contrast to traditional biochemical and immunoenzyme test-systems ensures rapid analysis of real part of erythrocytes’ permittivity () which determine of definite molecules’ polarizability in external alternating electric field. In our experiment we observe the decrease  in erythrocytes’ suspension at action procaine (c=500mcg/ml) concerning control samples. The lidocaine’s action (c=500mcg/ml) results in more marked decrease  in erythrocytes’ structures concerning procaine’s action possibly due to additional hydrating of organic molecule with amide bond.
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Частини книг з теми "Erythrocytes’ permittivity"

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Batyuk, Liliya, and Nataliya Kizilova. "MODELING OF DIELECTRIC PERMITTIVITY OF THE ERYTHROCYTES MEMBRANE AS A THREE-LAYER MODEL." In Development trends in medical science and practice: the experience of countries of Eastern Europe and prospects of Ukraine. Publishing House “Baltija Publishing”, 2018. http://dx.doi.org/10.30525/978-9934-571-31-2_2.

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Тези доповідей конференцій з теми "Erythrocytes’ permittivity"

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Shatalova, T. A., O. A. Gorobchenko, O. T. Nikolov, and S. V. Gatash. "Dielectric permittivity of erythrocyte suspensions at 9.2 GHz." In 2014 24th International Crimean Conference "Microwave & Telecommunication Technology" (CriMiCo). IEEE, 2014. http://dx.doi.org/10.1109/crmico.2014.6959768.

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