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Dissertations / Theses on the topic 'Přechodný kov'

Author: Grafiati
Published: 28 June 2021
Last updated: 17 February 2022

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1

Šik, Ondřej. "Studium šumových charakteristik detektorů radioaktivního záření." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-218099.

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The main goal of this Master’s thesis is to describe relationship between low frequency noise spectral characteristics of Cadmium-Telluride radiation detectors depending on applied voltage and detectors reaction to illumination of various wavelengths. Also, the reaction and influence of higher operating temperatures were investigated. The noise measurements shown that the dominant noise type at low frequencies is the 1/f noise. Several samples with different resistivity were tested. By comparing results, we are able to estimate the quality of detectors and their sensibility to illumination and
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2

Bukvišová, Kristýna. "In-situ elektronová mikroskopie." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-402571.

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Cílem diplomové práce je popsat oxidaci nanotrubic sulfidu wolframičitého za zvýšených teplot v přítomnosti vodní páry. Na jejich povrchu se nejprve vytvoří nanočástice oxidu wolframu, ze kterých potom vyrůstají nanodráty. Na základě in-situ experimentů v rastrovacím elektronovém mikroskopu je navržen mechanismus reakce a ten je zjednodušeně popsán analyticky. Ukazuje se, že elektronový svazek má zásadní vliv na reakci.
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3

Těšík, Jan. "Luminiscence polovodičů studovaná rastrovací optickou mikroskopií v blízkém poli." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-320110.

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This work is focused on the study of luminescence of atomic thin layers of transition metal chalkogenides (eg. MoS2). In the experimental part, the work deals with the preparation of atomic thin layers of semiconducting chalcogenides and the subsequent manufacturing of plasmonic interference structures around these layers. The illumination of the interference structure will create a standing plasmonic wave that will excite the photoluminescence of the semiconductor. Photoluminescence was studied both by far-field spectroscopy and near-field optical microscopy.
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Kuba, Jakub. "Studium fotoluminiscence tenkých vrstev MoS2." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-254284.

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The thesis deals with study of thin layers of transition metal dichalcogenides, especially of molybdenum disulfide. Nanostructures were fabricated on two-dimensional crystals of MoS2 and WSe2. Within followed analysis attention was paid to the photoluminescence properties. In the thesis transition metal dichalcogenides are reviewed and description of the modified process of preparation by micromechanical exfoliation is given.
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5

Šik, Ondřej. "Transportní, šumové a strukturální vlastnosti detektorů vysokoenergetického záření na bázi CdTe." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-261280.

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Poptávka ze strany vesmírného výzkumu, zdravotnictví a bezpečnostního průmyslu způsobila v posledních letech zvýšený zájem o vývoj materiálů pro detekci a zobrazování vysokoenergetického záření. CdTe a jeho slitina CdZnTe. jsou polovodiče umožnují detekci záření o energiích v rozsahu 10 keV až 500 keV. Šířka zakázaného pásma u CdTe / CdZnTe je 1.46 -1.6 eV, což umožňuje produkci krystalů o vysoké rezistivitě (10^10-10^11 cm), která je dostačující pro použití CdTe / CdZnTe při pokojové teplotě. V mé práci byly zkoumány detektory CdTe/CdZnTe v různých stádiích jejich poruchovosti. Byly použity v
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6

Andreev, Alexey. "Šumová spektroskopie detektorů záření." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-233425.

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Kadmium telurid je velmi důležitý materiál jak základního, tak i aplikovaného výzkumu. Je to dáno zejména jeho výhodnými elektronickými, optickými a strukturními vlastnostmi, které ho předurčují pro náročné technické aplikace. Dnes se hlavně používá pro jeho vysoké rozlišení k detekci a X-záření. Hlavní výhodou detektorů na bázi CdTe je, že nepotřebují chlazení a mohou spolehlivě fungovat i při pokojové teplotě. To způsobuje efektivnější interakce fotonů než je tomu u Si nebo jiných polovodičových materiálů. Obsahem této práce byla analýza a interpretace výsledků získaných studiem šumových a
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7

Zajaček, Jiří. "Šumová spektroskopie detektorů záření na bázi CdTe." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-233498.

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The main object of this work is noise spectroscopy of CdTe radiation detectors (-rays and X–rays) and CdTe samples. The study of stochastic phenomenon and tracing redundant low-frequency noise in semiconductor materials require long-term measurements in time domain and evaluate suitable power spectral densities (PSD) with logarithmic divided frequency axes. We have used the means of time-frequency analysis derived from the discrete wavelet transform (DWT) and we have designed the effective algorithm for PSD estimation, which is comparable with an original analog method. CdTe single crystal wit
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8

Pelnářová, Karolína. "Hledání účinných chelátorů kobaltu - 8-hydroxychinoliny." Master's thesis, 2021. http://www.nusl.cz/ntk/nusl-445817.

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Charles University Faculty of Pharmacy in Hradec Králové Department of Pharmacology & Toxicology Student: Karolína Pelnářová Supervisor: Prof. Přemysl Mladěnka, PharmD., Ph.D. Consultant: Václav Tvrdý, MSc.; Marcel Hrubša, MSc. Title of diploma thesis: Searching of effective cobalt chelators - 8-hydroxyquinolines Cobalt is one of the essential trace elements present in the human body. It forms a part of the organometallic complex of vitamin B12, which is essential for many physiological functions. Both overload and lack of cobalt in the body is associated with pathological conditions. Manifest
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9

Řezníčková, Alice. "Nanostruktury magnetoresponsivních oxidů přechodných kovů." Doctoral thesis, 2017. http://www.nusl.cz/ntk/nusl-370892.

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The thesis is focused on investigation of structural and magnetic properties of nanocomposites consisting of transition-oxide-based nanoparticles (NPs; CoFe2O4 and Fe2O3) embedded in dielectric matrices (SiO2, CeO2, TiO2, ZrO2, Al2O3). The nanocomposites were studied by broad range of complementary techniques (X-ray diffraction, electron microscopy, energy dispersive x-ray analysis, Mössbauer Spectroscopy and Magnetic measurements). Among them, analysis of the distributions of the NP magnetic moments and blocking temperatures was identified as a powerful tool for characterization of NP changes
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Beliš, Marek. "Selektivní komplexace iontů přechodných kovů." Master's thesis, 2017. http://www.nusl.cz/ntk/nusl-365329.

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Copper radionuclides possess physical properties suitable for utilization in nuclear medicine. Important part of their preparation is separation from mother elements, usually zinc or nickel. Currently used methods of separation have their limits, what opens field for finding new ways. One part of the Thesis contains preparation of simple ion exchangers and their selectivity study. The other part of the Thesis is dedicated to optimization of synthetic steps leading to new bifunctional ligands in suitable form for binding to macromolecular carriers and preparation of new set of exchangers.
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Faberová, Jana. "Interakce chalkonů s přechodnými kovy I." Master's thesis, 2021. http://www.nusl.cz/ntk/nusl-446104.

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Charles University Faculty of Pharmacy in Hradec Králové Department of Pharmaceutical Botany Candidat: Jana Faberová Supervisor: doc. Ing. Kateřina Macáková, Ph.D. Title of Thesis: Interaction of chalcones with transition metals I. Iron is a biogenic metal element with unpaired d-electrons that plays a key role in the survival of unicellular organisms, plants and mammals. The electron shell of the iron atom is able to easily bind and release electrons and thus contribute to the proper function of the organism. Iron is necessary to ensure the transport of respiratory gases, cell differentiation
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Šulcová, Martina. "Interakce chalkonů s přechodnými kovy II." Master's thesis, 2021. http://www.nusl.cz/ntk/nusl-446252.

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Charles University in Prague Faculty of Phramacy in Hradec Králové Department of Pharmaceutical Botany Candidate: Martina Šulcová Supervisor: Assoc. Prof. Ing. Kateřina Macáková, Ph.D. Title of the diploma thesis: Interaction of chalcones with transition metals II. Copper is one of the essencial elements in human body which is involved in the functioning of many enzymes and metabolic pathways. Although it appears in trace amounts in the body, its functions are irreplaceable. However, the ion level must be kept in balance by the various mechanisms of the body. If there is an excess or deficienc
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13

Šilhová, Markéta. "Interakce alkaloidů s přechodnými kovy II." Master's thesis, 2019. http://www.nusl.cz/ntk/nusl-405336.

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Charles University, Faculty of Pharmacy in Hradec Králové Department of: Pharmaceutical Botany Consultant: Ing. Kateřina Macáková, Ph. D. Student: Markéta Šilhová Title of Thesis: Interactions of alkaloids with transition metals II. Copper is an important component of the human body. It is involved in the right functioning of organ systems and is also a part of many important body enzymes. It is necessary to maintain a balanced amount of copper in the body in order to avoid excess or deficiency, which can lead to various diseases. The aim of this diploma thesis was to determine the copper chel
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14

Rzepecká, Radka. "Interakce alkaloidů s přechodnými kovy I." Master's thesis, 2019. http://www.nusl.cz/ntk/nusl-405499.

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Charles University Faculty of Pharmacy in Hradec Králové Department of Pharmaceutical Botany Candidate: Radka Rzepecká Supervisor: Ing. Kateřina Macáková, Ph.D. Title of Thesis: Interactions of alkaloids with transition metals I. Copper is one of the essential trace elements that are necessary for the proper functioning of the organism. Copper is a significant component of many enzymes that affect various metabolic processes in the human body. It is important that the level of copper in the body is regulated because its deficit or excess lead to a variety of pathological conditions. Alkaloids
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Loskotová, Lenka. "Interakce alkaloidů s přechodnými kovy IV." Master's thesis, 2020. http://www.nusl.cz/ntk/nusl-412235.

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Charles University Faculty of Pharmacy in Hradec Králové Department of Pharmaceutical Botany Candidate: Bc. Lenka Loskotová Supervisor: doc. Ing. Kateřina Macáková, Ph.D. Title of Thesis: Interactions of alkaloids with transition metals IV. Copper is a biogenic trace element that participates in the proper function of an organism. It is part of a number of enzymes and participates in metabolic processes in the human body. The level of copper in the organism should be regulated to avoid its excess or deficit, as pathologies could occur. Alkaloids are natural nitrogenous substances of alkaline n
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16

Cymbál, Martin. "Interakce alkaloidů s přechodnými kovy III." Master's thesis, 2020. http://www.nusl.cz/ntk/nusl-412276.

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Charles University Pharmaceutical Faculty in Hradec Králové Department of Pharmaceutical Botany Candidate: Bc. Martin Cymbál, DiS. Supervisor: doc. Ing. Kateřina Macáková, Ph.D. Diploma thesis 2019/2020: Interactions of alkaloids with transition metals III., pp. 86. Copper is one of the important trace elements in the body. It regulates various enzymatic pathways. This work monitors the chelating and reducing activity of isochinoline alkaloids of the family Amaryllidaceae. The alkaloids of Amaryllidaceae have a large number of effects such as analgesic, narcotic, antiarrhythmic, antihypertensi
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17

Mantlíková, Alice. "Struktura a magnetismus nanočástic na bázi přechodných kovů." Master's thesis, 2011. http://www.nusl.cz/ntk/nusl-300444.

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The aim of the work is characterization of structure and magnetic properties of various CoFe2O4/SiO2 nanocomposites. Emphasis was put on the corelation of the magnetic properties with particle size (samples with different annealing temperature) and with strenght of the interparticle interactions (samples with different Fe/Si ratio or without silica matrix). Structure properties of all samples were determinated by powder x-ray diffraction, scanning and transmission electron microscopy. Magnetic properties were determinated by standard (temperature dependence of magnetization, magnetization isot
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18

Hyklová, Barbora. "Vrstevnaté hydroxidy přechodných kovů, jejich delaminace a vlastnosti." Doctoral thesis, 2018. http://www.nusl.cz/ntk/nusl-373938.

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Charles University Faculty of Science Study programme: Inorganic Chemistry Mgr. Barbora Hyklová Layered Transition Metal Hydroxides: Delamination and Properties Extended abstract Supervisor: Ing. Kamil Lang CSc., DSc. Supervisor-Consultant: RNDr. Jan Demel PhD. Prague, 2017 Layered transition-metal hydroxides have attracted increasing attention as promising active electrode materials for electrochemical energy storage and conversion device due to facile preparation and modification, good tunability, high capacitance capability, fast reversible redox reactions, and cost effectiveness. Many repo
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19

Matoušek, Mikuláš. "Výpočty elektronové struktury biologicky relevantních komplexů přechodných kovů." Master's thesis, 2020. http://www.nusl.cz/ntk/nusl-415411.

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Porphyrins are an important class of biomolecules, which are heavily studied, both ex- perimentally and computationally. But, despite the intensive efforts, for many questions we still aren't able to consistently find an agreement between theory and experiment. One of the still unresolved issues is the character of the ground state of the Fe(II)-porphyrin molecule. We used a model of the Fe(II)-porphyrin molecule to study the effects of geometrical changes on the spin states. By carrying out extensive DMRG-CASSCF cal- culations topped with TCCSD correlation treatment we are able to link the ef
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20

Nečas, David. "Reakce alkenů vyvolané hydridy a alkyly přechodných kovů." Doctoral thesis, 2009. http://www.nusl.cz/ntk/nusl-278406.

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l0 5. Conclusion 1) The first and practical catalýic method for smooth deallylation of 2-substituted-2-allylmalonates to 2-substituted malonates via selective cleavage of the C-C bond under mild reaction conditions has been developed' The reaction seems to be general with respect to the transition-metal complexes; however, the comparison of Ru and Ni catalysts indicates considerable differences in their specific activity and selectiviý. Last but not least, the smooth deallylation offers an opportuniý to use the allyl group as an effective protective group for acidic hydrogen of malonic esters.
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Žádný, Jaroslav. "Příprava a využití komplexů přechodných kovů s helikálními ligandy." Doctoral thesis, 2015. http://www.nusl.cz/ntk/nusl-333755.

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The Thesis describes our successful endeavour to develop asymmetric synthesis of functionalized 2H-pyran or 2,7-dihydrooxepine helicene-like compounds in an optically pure form. These helicene surrogates were fully characterized and their use in enantioselective catalysis as chiral ligands, organocatalysts or chiral modifiers was explored. A general method for the preparation of optically pure [5]- and [6]heterohelicenes by asymmetric synthesis is based on highly diastereoselective [2+2+2] cycloisomerization of centrally chiral triynes mediated/catalyzed by transition metal complexes. Stereoch
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Novák, Petr. "Využití reakcí katalyzovaných komplexy přechodných kovů v syntéze biologicky aktivních sloučenin." Doctoral thesis, 2008. http://www.nusl.cz/ntk/nusl-290741.

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Kobrlová, Andrea. "Využití bezmembránové elektrolytické cely pro elektrochemické generování těkavých specií přechodných kovů." Master's thesis, 2013. http://www.nusl.cz/ntk/nusl-324638.

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This diploma thesis is focused on the study of electrochemical generation volatile species of gold and silver. Two non-membrane electrolytic cells were constructed for electrochemical generation volatile species. These cells differ in the volume of electrode chamber. An atomic absorption spectrometry with quartz tube atomizer was used in most experiments. The equipment was performed in flow continuous mode. Experiments confirmed, that it is possible to use an atomic absorption spectrometry with quartz tube atomizer for generate volatile species of gold and silver by using two non-membrane elec
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Hurný, David. "Syntéza cyklických sloučenin za využití organokatalýzy a katalýzy komplexy přechodných kovů." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-339206.

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This thesis deals with an enantioselective synthesis of cyclic compounds by using a combination of organocatalysis and transition metal catalysis. The thesis deals mainly with usage of aminocatalyst for activation of aldehydes and copper catalyst for activation of terminal triple bond. The first part is focused on the preparation of starting compounds for cyclizations (α-oxoesters, α- substituted nitroalkanes and α-substituted aldehydes). The second part concerns carbocyclization itself and optimization of reaction conditions to achieve highly stereoselective reaction. Powered by TCPDF (www.tc
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Prchalová, Eva. "Využití reakcí zprostředkovaných přechodnými kovy v syntéze biologicky aktivních derivátů estronu." Doctoral thesis, 2016. http://www.nusl.cz/ntk/nusl-352036.

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This thesis relates to the preparation and use of new non-estrogenic ligands selective for certain types of the 17β-hydroxysteroid dehydrogenase superfamily (17βHSD). Such nonestrogenic compounds, which selectively regulate the activity of 17βHSD are believed to offer new solutions in endocrine therapy, diagnosis and treatment of estrogen-dependent types of diseases. In recent years in the laboratories of my supervisor prof. Kotora differently substituted steroid derivatives with interesting biological properties were prepared. Based on the gained experiences, it was decided to prepare C-15 es
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Plášil, Jakub. "Krystalochemie vybraných přírodních arseničnanů a fosforečnanů uranylu dvojmocných přechodných kovů a hořčíku." Master's thesis, 2009. http://www.nusl.cz/ntk/nusl-281667.

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Jagtap, Pratap Ramling. "Propojení organokových činidel, katalýzy přechodnými kovy, radikálových a karbokationických procesů v dominových reakcích." Doctoral thesis, 2017. http://www.nusl.cz/ntk/nusl-267012.

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This work deals with the development of methodology, which couples reactive intermediates of varying oxidation states, in tandem sequences comprising 1,2-organometallic addition/transition metal catalyzed isomerization/Michael addition/SET oxidation/radical cyclization/oxygenation steps in the synthesis of highly functionalized carbocycles. Implementation of this sequence being catalytic in the SET oxidant was studied. 1,4-Diketones were synthesized in a tandem 1,2-addition/ruthenium-catalyzed redox isomerization/enolates oxidation/radical dimerization reaction and results were compared with 1
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Srnec, Martin. "Katalytické a elektronové vlastnosti "redox-aktivních" metaloproteinů a komplexů přechodných kovů z pohledu výpočetní chemie." Doctoral thesis, 2010. http://www.nusl.cz/ntk/nusl-295443.

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Charles University in Prague Faculty of Science Department of Modeling of Chemical Properties of Bio- and Nanostructures Catalytic and Electronic Properties of Redox-Active Metalloenzymes and Transition- Metal Complexes: Insights from the Computational Chemistry Dissertation Thesis Abstract RNDr. Martin Srnec Supervisor: Mgr. Lubomír Rulíšek, CSc. Institute of Organic Chemistry and Biochemistry AS CR Center for Biomolecules and Complex Molecular Systems Praha 2010 Introduction Metals and their ions play a key role in maintaining life. They frequently promote protein folding, the stabilization
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Šálová, Tereza. "[2+2+2] Cykloadiční reakce katalyzovaná komplexy přechodných kovů jako robustní nástroj syntézy derivátů pyridinu." Master's thesis, 2008. http://www.nusl.cz/ntk/nusl-290772.

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Malová, Zuzana. "Koordinační chemie farmak." Master's thesis, 2020. http://www.nusl.cz/ntk/nusl-435947.

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Present methods for diagnosis of neurodegenerative diseases are rather limited and in clinical practise are missing. This thesis is focused on utilization of the positron emission tomography using isotope 64 Cu(II). For the project, two contrast agents were proposed containing ligand for Cu (II) coordination and thioflavine T derivative as fluorescent dye, also as a targeting compound. Structure of the thioflavine T derivative was defined by X-ray structural analysis. The selected fluorescent dye has a high affinity for incipient amyloids and, when bound to their structure, has enhanced fluore
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Antunes, Corrêa Cinthia. "Strukturní analýza vybraných silicidů přechodných kovů pomocí rentgenové difrakce a dynamického upřesňování dat z elektronové difrakce." Doctoral thesis, 2017. http://www.nusl.cz/ntk/nusl-369550.

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Title: Structure analysis of some transition metal silicides using X-ray diffraction and dynamical refinement against electron diffraction data Author: Cinthia Antunes Corrˆea Department: Physics of Materials Supervisor: prof. RNDr. Miloš Janeček, CSc., Department of Physics of Materials Abstract: This thesis presents the crystal structure analysis of several transition metal silicides. The crystal structures were studied primarily by precession electron diffraction tomography (PEDT) employing the dynamical refinement, a method recently developed for accurate crystal structure refinement of el
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Pelcová, Pavlína 1978. "Stanovení přechodných kovů v biologických materiálech metodami atomové spektrometrie :stanovení chemických forem rtuti v biologických materiálech /." Doctoral thesis, 2005. http://www.nusl.cz/ntk/nusl-92731.

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Kucharčíková, Vendula. "Comparison of manual and dynamic extractions of selected transition metals from solid samples." Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-350277.

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Charles University in Prague, Faculty of Pharmacy in Hradec Králové Department of Analytical Chemistry Candidate: Vendula Kucharčíková Supervisor: Burkhard Horstkotte, Ph.D. Consultant: Doc. PharmDr. Hana Sklenářová, Ph.D. Title of thesis: Comparison of manual and dynamic extractions of selected transition metals from solid samples The analysis of trace metals in soil is a subject of study in many laboratories. Due to large industrial areas soil can be highly contaminated. This work focused on two easy methods - manual extraction and single flow extraction with the same extractant -acetic acid
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Gorbunov, Denis. "Magnetické a magnetoelastické vlastnosti f-d intermetalik s vysokým obsahem 3d kovů." Doctoral thesis, 2014. http://www.nusl.cz/ntk/nusl-332311.

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Fundamental magnetic properties have been studied in RFexAl12-x (R - heavy rare-earth element) compounds with the tetragonal crystal structure of the ThMn12 type. In the homogeneity range 4 ≤ x ≤ 6, exchange interactions and magnetocrystalline anisotropy of the Fe sublattice are significantly modified as found in LuFexAl12-x with non-magnetic Lu. With increasing Fe content, antiferromagnetic exchange interactions weaken and ferromagnetic strengthen. The change of the type of magnetic ordering occurs in the vicinity of x = 5. The Fe sublattice displays an easy-plane magnetic anisotropy that wea
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Brajer, Martin. "Laserová spektroskopie materiálů pro spintroniku." Master's thesis, 2015. http://www.nusl.cz/ntk/nusl-331777.

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In these diploma thesis magnetically ordered materials are studied with the prospect of their application in spintronics. Specifically, we investigated metallic alloy FeRh, which undergoes a magnetic phase transition from antife- romagnetic phase to feromagnetic one around 100◦ C. This phenomenon can be readily used in memory devices. Laser spectroscopy is used as a nondestructive method without need of any electrical contacts. Magnetic properties of FeRh are studied by magnetooptical effects including quadratic magnetic linear dichroism. The measured polarization rotations are of the order of
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36

Obuch, Jakub. "Příprava nesymetrických derivátů DOTA a studium jejich komplexů." Master's thesis, 2021. http://www.nusl.cz/ntk/nusl-449091.

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Lanthanide(III) complexes are compounds with both diagnostic and therapeutic applications. For diagnostic applications, they are used as contrast agents for imaging techniques such as MRI, PET or SPECT. In therapy, complexes of beta or alpha particle- emitting radionuclides are used. If the complexes contain protonable groups, their behaviour is dependent on pH of the solution. Protonation of these groups should occur close to the physiological pH. If the efficiency (relaxivity) of the MRI contrast agent is dependent on protonation state, this method can be used for determination of pH of tiss
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37

Pacáková, Hana. "Chemické a environmentální vzdělávání na střední škole - téma: Suroviny a jejich využití." Master's thesis, 2010. http://www.nusl.cz/ntk/nusl-284886.

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Topics Raw materials and their utilisition has been disposed in this graduation thesis. A survey of curicular documents, school books for secondary schools and theses focused on D-elements has been conducted. The technical text transformation into the teaching material has been made on the basis of this survey. This can be used as teaching aids in chemistry and environmental lessons. Experiments suitable for secondary teaching have been carried and the lab protocol for the higher and lower grades of grammar schools has been created.
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38

Špánek, Jiří. "Koordinační sloučeniny jako kontrastní látky pro 19F MRI." Master's thesis, 2018. http://www.nusl.cz/ntk/nusl-388728.

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Magnetic Resonance Imaging (MRI) is one of noninvasive imaging and diagnostic methods in today's medicine. The most commonly measured nucleus is H1 of the water molecules present in the human body. There are also methods that use signal saturation transfer between the contrast agent and water molecules via exchangeable H1 nuclei, or use a different nucleus like F19 . Compounds that show a high potential in this area are complexes of paramagnetic ions such as Gd3+ , Eu3+ , Co2+ , Cu2+ and Ni2+ , which can affect relaxation times and chemical shifts of other atoms due to their magnetic propertie
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Krchová, Tereza. "Responzivní kontrastní látky pro tomografii magnetické rezonance (MRI)." Doctoral thesis, 2017. http://www.nusl.cz/ntk/nusl-357606.

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ABSTRACT This work is focused on the synthesis of a family of new macrocyclic ligands with exchangeable protons on coordinating groups that could potentially serve (after complexation with suitable paramagnetic lanthanide(III) ions) as responsive contrast agents (CAs) for magnetic resonance imaging (MRI). It is expected that measurement of extracellular pH should bring information for tumorous disease diagnoses and/or for suggesting the most efficient treatment. Therefore, our attention was focused on pH-dependent CAs based on a PARAmagnetic Chemical Exchange Saturation Transfer (PARACEST) mec
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Hraníček, Jakub. "Konstrukce miniaturních průtokových cel pro elektrochemické generování těkavých sloučenin." Doctoral thesis, 2011. http://www.nusl.cz/ntk/nusl-312116.

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(EN) The presented dissertation thesis summarizes the new results of electrochemical generation of volatile compounds usable in atomic spectral methods. The main aim of this work is to develop and to characterize new types of electrolytic flow-through cells and to examine their possibilities of determination of arsenic, selenium and antimony by using the electrochemical hydride generation technique coupled with atomic absorption spectrometry with a quartz tube atomizer. Individual electrolytic cells were designed and constructed to comply with two important requirements. The cathode chamber of
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