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Synthesis of SiO2/Au core/shell nanoparticles for enhancement of OCT signal
Kantorová, Martina ; Kolář, Radim (referee) ; Drbohlavová, Jana (advisor)
The aim of this master thesis is synthesis of SiO2/Au core/shell nanoparticles. These nanoparticles should improve the signal of optical coherence tomography (OCT). The procedure of nanoparticle synthesis is described in the work. Synthetized nanoparticles were analyzed by scanning electron microscopy (SEM), Ultraviolet-Visible spectroscopy (UV-Vis), Near-infrared spectroscopy (NIRS), Fourier transform-infrared spectroscopy (FT-IR) and Dynamic light scattering (DLS). Then, the synthetized nanoparticles were tested for enhancement of OCT signal. For this testing were also used commercial nanoparticles with the same structure and similar size.
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The effect of muscle relaxation time during intermittent isometric contractions on finger flexors oxygenation
Fílová, Veronika ; Baláš, Jiří (advisor) ; Vomáčková, Helena (referee)
Author: Bc. Veronika Fílová Supervisor: doc. Jiří Baláš, Ph.D. Title: The effect of muscle relaxation time during intermittent isometric contractions on finger flexors oxygenation Objectives: The main aim of this thesis is to evaluate the effect of recovery time during intermittent isometric contractions of the finger flexors on the overall performance and oxygenation of the flexor digitorum profundus muscle in climbers of different performance categories. Methods: 27 climbers were divided into two groups according to current climbing performance (red point (RP) more and less than 7 on the Union Internationale des Associations d'Alpinisme (UIAA) scale). Group No. 1 consisted of 7 men and 6 women with an average performance of 5+/6- on the UIAA scale with an average climbing experience of 4.2 years. Group No. 2 consisted of 7 women and 7 men with an average performance of 8- on the UIAA scale with an average climbing experience of 11.2 years. All climbers completed 4 measurements on a 1D-SAC (Spacelab, Sofia, Bulgaria) climbing dynamometer with simultaneous data measurement using Portamon (Artinis Medical Systems, Einsteinweg, Netherlands) near-infrared spectroscopy (NIRS). During the first visit, the maximal voluntary contraction (MVC) of the finger flexors and the sustained contraction of the...
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Effect of caffeine ingestion on intemittent isometric finger flexor contractions
Doktorová, Anežka ; Baláš, Jiří (advisor) ; Bačáková, Radka (referee)
Title: Effect of caffeine on finger flexor performance in sport climbers. Objectives: The goal of this work was to assess the effect of caffeine on the performance of the finger flexors during the all-out test in sports climbers. Another goal was to determine maximal strength in measured participants. Methods: 8 climbers (7 in the age 20-25 and one 34 years old) completed 3 experimental conditions during three laboratory visits to evaluate the effect of caffeine on finger flexor performance. The first was a control measurement and then, in random order, caffeine in the amount of 5mg/kg and placebo. Participants did a maximal strength test, a force gradient test and a 4-minute all-out test. Results: The maximum force reached an average of 49,0 kg during the control measurement, the total force impulse was 3889.6 kg.s, the critical force was 16,6 kg and the fatigue index was 68 %. After caffeine supplementation, the maximum strength values changed to 50,6 kg on average, for the force impulse to 3898,5 kg.s, the critical strength reached 15,7 kg and the fatigue index 69,1 %. The standard deviation of maximal strength shifted from 9,4 kg to 9,5 kg, the total force impulse from 684,4 kg.s to 717,5 kg.s, the critical force from 4,0 kg to 5,1 kg and the index fatigue from 6,2 % to 7,4 %. Key words:...
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Verification of a 4 min all out test as a reliable indicator of sport climbers finger flexors critical force
Taušl, Pavel ; Baláš, Jiří (advisor) ; Gajdošík, Jan (referee)
Title: Verification of a 4 min all out test as a reliable indicator of sport climbers finger flexors critical force. Objectives: The aim of this study was to assess the reliability of an 4 min all-out test which determines climbers finger flexors critical force. Methods: 6 participants did a 4 minute all out test to determine their finger flexors critical force. Afterwards, they did several verification tests with +2, -2, -4 and -6 kilograms added or deducted from their crtical force for 12 minutes or until failure, where their maximal metabolic steady state should be observed based on muscle oxygenation and subjective intensity control. Results: 4 climbers have reached their maximal metabolic steady state. 2 of them reached it at 4 kilograms below their critical power and 2 of them reached it at 6 kilograms below their critical power. 2 climbers did not make another verification measurements. Conlcusion: 4 minute all-out test overestimated critical power by 26 % at a given population. Key words: spectroscopy, maximal metabolic steady state, sport climbing, climbing performance.
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The use of MOXY monitor to assess finger flexor oxygenation during exhaustive climbing
Zaťková, Alžbeta ; Baláš, Jiří (advisor) ; Gajdošík, Jan (referee)
Title: Use of MOXY monitor for evaluation of oxygenation of finger flexors during incremental climbing load. Objectives: The aim of the work was to assess the dynamics of muscle oxygenation using MOXI monitor and Portamon during incremetal climbing load Methods: The test involved 19 individuals (14 male (M) and 5 female (F), age 29,5 ± 8,5 (years) M, 26,5 ± 5,7 (years) F, weight 70,2 ± 7,9 (kg) M and 58,1 ± 2,4 (kg) F, height 176,9 ± 5,6 (cm) M, 170,2 ± 1,3 (cm) F, length of climbing experience 12,1 ± 7,1 years M 9,8 ± 4 F, performance on the Union International des scale Associations d'Alpinisme (UIAA) 6+ to 10 M and 7 to 9 F). Climbers underwent test climbing on a climbing ergometer at submaximal load (vertical, 9 m / min) and a incremental climbing test to a subjective maximum. Tissue saturation in the flexor digitorum profundus (FDP) and extensor digitorum communis (EDC) was assessed by near-infrared spectroscopy with a Portamon and MOXY instrument. Results: In 5 of the 19 tested, it was not possible to determine the oxygenation breakpoint using the MOXY record. Compared to Portamon, the difference in threshold values ranged from 0-9ř. Conclusion: Due to the unclear breakpoint in oxygenation in some respondents and the small agreement with the Portamon device, MOXY cannot be used to evaluate...
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Soil archives of chernozems
Kolařík, Petr ; Strouhalová, Barbora (advisor) ; Trubač, Jakub (referee)
Soil archives provide valuable information on the past of the environment, in particular vegetation history (Costantini 2018). The aim of this thesis is study the feasibility of using the modern method of near-infrared spectroscopy to study the vegetation history of chernozems, using previously collected databases (Vysloužilová et al. 2015) to extract information from new sites along the grassland-woodland boundary in Minnesota, USA. The results are then analyzed and compared to known information and the results of more traditional approaches.
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Comparison of NIRS and other methods to determine anaerobic threshold
Šimon, Jan ; Slabý, Kryštof (advisor) ; Dostal, Jiří (referee)
The aim of this study was to compare NIRS (Near-infrared spectroscopy) and respiratory parameters measurement in determination of anaerobic treshold. Additionally changes in muscle oxygenation (SmO2) were described during incremental bicycle excercise. Fifteen subjects, 9 men and 6 women took part in this study. To verify the reliability of the measurement, the experiment was performed in the form of a test/retest with a few day's delay. The value of SmO2 was measured in m. gastrocnemius lateralis and m. vastus lateralis. In addition, respiratory parameters and pulse rate were recorded during the examination. The data obtained show that the breakpoint in the SmO2 dynamics determined by the NIRS method means that the excercise intensity above the anaerobic threshold is reached, because the breakpoint is located in the area of the Respiratory Compensation Point. In the SmO2 parameter, it is also possible to monitor the equilibrium state during the rest phase. The SmO2 parameter after the ramp log terminates exceeds the value in the rest phase, and returns to the quiescent value usually within 2 minutes. The test/re-test method has verified the reliability of the measurement.
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Handling in adults physiotherapy
Smutný, Michal ; Smolíková, Libuše (advisor) ; Zounková, Irena (referee)
The thesis Handling In Adults Physiotherapy summarizes the knowledge of respiratory handling in application on adult patients. Part of the thesis also covers the relationship between body position and respiratory motor control. Experimental part consists of a clinical study with 10 COPD patients. The patients were treated in 3 positions by respiratory handling therapy. The result demonstrates a significant change in blood saturation after the therapy in position on a side. It also proves appropriateness of the side position in comparison with sitting. Keywords respiratory handling, contact-stimulating physiotherapy, respiratory physiotherapy, oxymetry, NIRS
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Synthesis of SiO2/Au core/shell nanoparticles for enhancement of OCT signal
Kantorová, Martina ; Kolář, Radim (referee) ; Drbohlavová, Jana (advisor)
The aim of this master thesis is synthesis of SiO2/Au core/shell nanoparticles. These nanoparticles should improve the signal of optical coherence tomography (OCT). The procedure of nanoparticle synthesis is described in the work. Synthetized nanoparticles were analyzed by scanning electron microscopy (SEM), Ultraviolet-Visible spectroscopy (UV-Vis), Near-infrared spectroscopy (NIRS), Fourier transform-infrared spectroscopy (FT-IR) and Dynamic light scattering (DLS). Then, the synthetized nanoparticles were tested for enhancement of OCT signal. For this testing were also used commercial nanoparticles with the same structure and similar size.
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