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Thematische Bibliographien / Chemická struktura / Dissertationen

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Dissertationen zum Thema „Chemická struktura“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 6. Februar 2022

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1

Olivová, Lucie. "Chemická analýza a-CSi:H a a-CSiO:H vrstev." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2021. http://www.nusl.cz/ntk/nusl-444209.

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Plasma-enhanced chemical vapor deposition is a promising technology for the preparation of materials in the form of thin films with controlled physical-chemical properties, which can be affected by changing input precursors or deposition conditions as needed. In this thesis, plasma nanotechnology was used to synthesize thin films on silicon wafers. Tetravinylsilane was chosen as a precursor for the synthesis of the films. In addition to pure tetravinylsilane, mixtures of tetravinylsilane with argon and mixtures of tetravinylsilane with oxygen were also used as input precursors for film deposit

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2

Ševčík, Ivan. "Systém pro vyhledávání chemických struktur." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2018. http://www.nusl.cz/ntk/nusl-385936.

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This thesis deals with the problem of searching of structures in large chemical compounds databases. The aim is to design and implement an efficient system that supports two basic types of search, which are identity and substructure search. This task is complicated not only by the large number of entries in databases but also by graph representation of chemical structures, for which many algorithms are hard to solve. The thesis will introduce concepts which will prove useful in solving these problems. A web service is also created as a part of the thesis in order to make the database searching

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3

Stehnová, Ivana. "Vliv chemické struktury změkčovadla na vlastnosti bioplastu na bázi polyhydroxybutyrátu." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2018. http://www.nusl.cz/ntk/nusl-438891.

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This master’s thesis deals with plasticization of poly(3-hydroxybutyrate), polylactid acid and their blend. It explores effect of chemical structure of plasticizer on mechanical properties of this polymer blend and on its diffusion from the polymer blend. Syntheses of plasticizers based on oligomeric polyadipates, citrates, lactate and esters of 2 ethylhexanoic acid with poly(ethyleneglycol) were carried out. Molecular weight distribution of synthesized plasticizers was determined using gel permeation chromatography. Poly(3-hydroxybutyrate), polylactid acid and their blend were plasticized wit

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4

Lysáček, David. "Tenké vrstvy polykrystalického křemíku." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-233931.

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The doctoral thesis deals with the structure and properties of the polycrystalline silicon layers deposited on the silicon wafers backside. The wafers are further used for production of semiconductor devices. This work is focused on detailed description of the layers structure and study of the gettering properties and residual stress of the layers. The main goal of this work is to develop two novel technologies. The first one leads to improvement of the temperature stability of the gettering properties of the layers, and the second one solves the deposition of the layers with pre-determined re

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5

Musilová, Iveta. "PROGRESIVNÍ VÝROBNÍ POSTUPY A MODELOVÁNÍ STRUKTUR A VLASTNOSTÍ LITIN S KULIČKOVÝM GRAFITEM." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-233882.

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The thesis is concerned with relationships between progressive technological processes of spheroidal graphite cast iron’s production and their structural properties. The aim of the work is to explain causal relationship between parameters of the proposed manufacturing technology of the iron type given (involving selected variants of modification and inoculation of melt and the parameters of melt crystallization, solidification and cooling down in a mould), their structure and even chemical heterogeneity of elements in this structure. For close specification of presented relationships three-dim

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6

Chmela, Ondřej. "Pokovování polyetylentereftalátu mědí a realizace vodivých struktur." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220081.

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The content of this master’s thesis are methods of pretreatment and coating of the surface of PET to produce conductive copper structure and quality control. Thesis also includes theoretical analysis of these methods. Physical and chemical techniques of surface pretreatment methods are discussed in the theoretical part as well as methods making surface of substrate conductive, the subsequent galvanic copper plating and quality control of coating and testing of the adhesion between layers. The experimental part focuses on two methods of the polymer material surface pretreatments. The properties

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Pozdniakovaitė, Natalija. "Žmogaus baltymo p14.5 geno struktūra bei funkcija normaliose ir onkoproliferuojančiose ląstelėse." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2006. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2006~D_20060622_093527-75486.

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Human p14.5 perchloric acid-soluble protein (PSP) is a member of family (YER057c/YJGF family) of small proteins. The highly conserved throughout evolution proteins are characterized as multifunctional proteins comprised of ~ 80 homologues exhibiting varying degrees of sequence homology from 38 % to 93 %. The proteins are involved in different cellular pathways of lower and higher eukaryotes. The biological role of these proteins is not yet well characterized. Human p14.5 protein is homologue of UK114 protein extracted from goat liver and characterized as tumor antigen. Antibodies raised agains

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8

Stejskal, Marek. "Vliv chemického složení a tepelného zpracování na strukturu a vlastnosti dvoufázových austeniticko-feritických korozivzdorných ocelí." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382114.

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This thesis focused on austenitic-ferritic (duplex) stainless steels and their mechanical and technological properties. The theoretical part includes introduction to chemical composition, structure, heat treatment and properties of these steels. The practical part focuses on influence of casting temperature on technological properties of ASTM A890 Gr4A stainless duplex steel. Furthermore, there is evaluated influence of chemical composition and heat treatment on structure and mechanical properties of different duplex stainless steels.

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Kaněra, Miloš. "Výroba odlitků z austeniticko-feritických hyperduplexních korozivzdorných ocelích." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-445174.

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The thesis deals with hyper duplex stainless austenitic-ferritic steels and their mechanical and castability properties. The evaluation of resistance to pitting corrosion is divided by PRE values. Steels with a PRE value higher than 48 belong to the group of hyper duplex steels. The theoretical part contains an introduction to the chemical composition, structure and properties of these steels. The practical part is focused on the conditions of tendency to crack castings during solidification and cooling. Furthermore, there is evaluated influence of intermetallic phases on mechanical properties

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10

Czulucki, Andreas. "Struktur-/Eigenschafts-Beziehungen in ternären Übergangs- und Seltenerdmetall-Pniktid-Chalkogeniden." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-33354.

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Ziel dieser Arbeit war es, Beziehungen zwischen den kristallchemischen Eigenschaften und dem beobachteten anomalen Verhalten im spezifischen elektrischen Widerstand (nicht-magnetischer Kondo-Effekt) aufzuzeigen und zusammenhängend zu interpretieren. Verbindungen, an denen dieser Effekt beobachtet wurde, werden aus einem Übergangs-, oder Actinidmetall mit je einem Vertreter der 15. (Pniktogene) und 16. Gruppe (Chalkogene) des Periodensystems gebildet und kristallisieren im PbFCl-Strukturtyp. Da zu ternären Actinidmetall-Pniktid-Chalkogeniden (z.B. ThAsSe, UPS) nur sehr wenige chemische und kris

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11

Leisegang, Tilmann. "Röntgenographische Untersuchung von Seltenerdverbindungen mit besonderer Berücksichtigung modulierter Strukturen." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2010. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-38037.

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Bereits kurz nach Ende des zweiten Weltkriegs, als vergleichsweise große Mengen hochreiner Seltener Erden (SE) für die Wissenschaft bereit standen, wurde erkannt, dass die SE und deren Verbindungen eine Vielzahl bis dahin nicht untersuchter bzw. gänzlich unbekannter physikalischer Phänomene bergen. Zu diesen zählen insbesondere die magnetischen Ordnungen, der KONDO-Effekt, quantenkritische Punkte, das Schwere-Fermionen Verhalten und die Supraleitung. Es konnte teilweise ein drastischer Einfluss leichter Änderungen der chemischen Zusammensetzung auf die physikalischen Eigenschaften dieser Stoff

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12

Armbrüster, Marc. "Bindungsmodelle für intermetallische Verbindungen mit der Struktur des CuAl2-Typs." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2004. http://nbn-resolving.de/urn:nbn:de:swb:14-1107183440618-33817.

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Das Ziel der vorliegenden Arbeit war es neue Wege aufzuzeigen, mit deren Hilfe Modelle der chemischen Bindung in intermetallischen Verbindungen entwickelt werden können. Diese Modelle sollten sowohl auf experimentelle als auch auf quantenchemische Befunde gestützt und physikalisch sinnvoll sein. Untersuchungsobjekt waren intermetallische AB2-Verbindungen mit der Struktur des CuAl2-Typs. Von den vielen Vertretern wurden drei Substanzklassen mit insgesamt sechs Verbindungen gewählt, nämlich CuAl2, die Stannide (MnSn2, FeSn2 und CoSn2) sowie die Antimonide (TiSb2 und VSb2). Für die Bestimmung der

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Ondráček, Michal. "Tvorba motivů tenkovrstvými metodami." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220968.

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The master’s thesis deals with the theory of thin film technology, especially creating these layers. The work includes the distribution of vacuum deposition techniques for physical (PVD) and chemical (CVD). The main aim is to create a theme in different ways of implementation by using magnetron sputtering device, and these motives evaluated in terms of the quality of sputtering.

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Jožef, Mađari. "Sinteza, strukturna, fizičko-hemijska i biološka karakterizacija novih N-heterocikličnih liganada i njihovih kompleksa sa jonima prelaznih metala." Phd thesis, Univerzitet u Novom Sadu, Prirodno-matematički fakultet u Novom Sadu, 2018. https://www.cris.uns.ac.rs/record.jsf?recordId=107656&source=NDLTD&language=en.

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Opisane  su  sinteze  novih  liganada  bis(ftalazin-1hidrazon)-2,6-diacetilpiridna  (Hz<sub>2</sub>DAP·2HCl),  bis(3-hlorpiridazin-6-hidrazon)-2,6-diacetilpiridina (Hp<sub>2</sub>DAP),  3-hlorpiridazin-6-hidrazon  di(2-piridil) ketona  (HpDPK),  ftalazin-1-hidrazon  di(2-piridil)ketona  (HzDPK)  i  ftalazin-1-hidrazon  piridin-2-karbaldehida  (HzPY).  Zajedničko  svojstvo  dobijenih liganada  je  &scaron;to  sadrže  piridinski  i  diazinski  prsten 

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Grill, Jiří. "Izolační a dielektrické vlastnosti vody." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219029.

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This master´s thesis deals about insulation and dielectric properties of water. It describes the structure of water, covalent and hydrogen bonds. It outlines primary chemical and physical properties of water and then it describes parameters of water - dynamic viscosity, conductivity, surface tension, pH and also describes dielectric properties - dielectric loss, loss factor, permittivity, polarization. Part of the work is practical section, which includes measurements of deionized water, destilled water, tap water and shows primary dependence such as dependence loss factor on frequency or rela

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Mirjana, Radanović. "Kompleksi nekih prelaznih metala sa Šifovim bazama aminogvanidina." Phd thesis, Univerzitet u Novom Sadu, Prirodno-matematički fakultet u Novom Sadu, 2015. https://www.cris.uns.ac.rs/record.jsf?recordId=95548&source=NDLTD&language=en.

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   U ovoj doktorskoj disertaciji opisane su sinteze novih kompleksa prelaznih metala sa piridoksiliden-  (PLAG), odnosno saliciliden-aminogvanidinom (SALAG). Dobijenikompleksi su okarakterisani elementalnom analizom, IR spektrima, konduktometrijskim i magnetnim merenjima, a većina i rendgenskomstrukturnom analizom. Osim toga, dobijene su i nove forme ovih &Scaron;ifovih baza, i to u vidu monokristala, čime su omogućena ispitivanja njihovih  molekulskih i kristalnih struktura, kao i uporedna analiza sa koordinovanim ligandima.    Sa PLAG je sintetisano 7 novi 

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Suchá, Kateřina. "Hodnocení kvality/zdraví půdy v blízkosti obce Bohaté Málkovice." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392022.

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Diploma thesis evaluates quality and healthiness of the soil health located close to Bohate Malkovice focusing on changes in both physical and chemical characteristics of the soil in time. The theoretical part describes physical, chemical, and biological parameters of the soil. Selected physical parameters are structure, texture, determination of measured weight, bulk density of the soil, porosity, actual volumetric water content of the soil, aeration, saturated and unsaturated hydraulic conductivity, infiltration, and colour. Chosen chemical parameters are pH, carbonates, soil electrical cond

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Feja, Steffen. "Darstellung und Charakterisierung ternärer Molybdate in den Systemen M - Mo - O (M = Sn, Pb, Sb)." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2004. http://nbn-resolving.de/urn:nbn:de:swb:14-1101201293828-88525.

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Das Phasendiagramm Sn - Mo - O wurde für 500°C und 1000°C experimentell abgeleitet. Als ternäre Phasen konnten SnMo2O8 und Sn1-xMo4-yO6-2y dargestellt werden. Die Phasen SnMo5O8 und Sn4,4Mo24O38 konnten unterhalb von 1000°C nicht dargestellt werden. Die Phase SnMo2O8 wurde über Festkörper - Gasphasenreaktion einkristallin dargestellt und auf ihr thermisches Verhalten untersucht. Anhand dieser Untersuchungen konnte das Phasendiagramm SnO2 - MoO3 abgeleitet werden. An dieser Phase wurden Einkristall-untersuchungen durchgeführt. Die Struktur der Phase SnMo2O8 wurde in der Raumgruppe Pa (a = 8,967

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Kitschke, Philipp. "Experimental and theoretical studies on germanium-containing precursors for twin polymerization." Doctoral thesis, Universitätsbibliothek Chemnitz, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-205443.

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Im Fokus dieser Arbeit standen zwei Ziele. Zum einem war es Forschungsgegenstand, dass Konzept der Zwillingspolymerisation auf germaniumhaltige, molekulare Vorstufen wie zum Beispiel Germylene, spirozyklische Germaniumverbindungen und molekulare Germanate zu erweitern und somit organisch-anorganische Komposite beziehungsweise Hybridmaterialien darzustellen. Dazu wurden neuartige Germaniumalkoxide auf der Basis von Benzylalkoholaten, Salicylalkoholaten sowie Benzylthiolaten synthetisiert, charakterisiert und auf ihre Fähigkeit Komposite beziehungsweise Hybridmaterialien über den Prozess der Zwi

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Berthold, Rico. "Strukturell komplexe intermetallische Verbindungen im System Al-Mg-Zn." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-155096.

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Die Elemente Al, Mg und Zn sind wichtige Komponenten für leichte und hochfeste Legierungen, wie die Al- oder Mg-Knetlegierungen. Darüber hinaus ist das Al-Mg-Zn-System sehr interessant, weil vier ternäre komplexe intermetallische Phasen, genannt τ1, τ2, Φ und q, darin vorkommen. Die aktuellen experimentellen Phasendiagramme des Al-Mg-Zn-Systems enthalten nur provisorische oder keine Homogenitätsbereiche der Φ-, τ2- und der q-Phase aufgrund unzureichender experimenteller Daten. Ziel der Arbeiten war es, die Homogenitätsbereiche der q-, τ2- und der Φ-Phase neu zu ermitteln und die Kristallstrukt

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Vašutová, Vlasta. "Charakterizace a chemická modifikace halloysitů." Master's thesis, 2010. http://www.nusl.cz/ntk/nusl-286341.

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Twelve halloysites from different sources in Slovakia, Turkey, China, New Zealand and U.S.A. have been characterized by combination of analytical methods together with the commercial sample of halloysite supplied by Sigma-Aldrich. The aim of this work was to select suitable candidates for to be used as carriers of porphyrine photoactive molecules. In nature, the formation of halloysite is related to the weathering of magmatic rocks or to the hydrothermal alteration of volcanic rocks, frequently in the contact with limestones. Halloysite belong to the kaolinite group, but, contrarily to kaolini

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Szabová, Lucie. "Chemická reaktivita tenkých vrstev oxidů ceru na kovových podložkách studovaná metodou teorie funkcionálu hustoty." Doctoral thesis, 2013. http://www.nusl.cz/ntk/nusl-326147.

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Title: Chemical reactivity of metal-supported ceria thin films: a density func- tional study Author: Lucie Szabová Department: Department of Surface and Plasma Science Supervisor: Prof. RNDr. Vladimír Matolín, DrSc., Department of Surface and Plasma Science, FMF, CU Abstract: The present work is a theoretical analysis based on numerical DFT+U simulations investigating the physical and chemical properties of ultrathin ceria films supported by Cu(111). Such materials exhibit high activity towards several important reactions in heterogeneous catalysis such as water-gas shift and CO oxidation, wit

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Futera, Zdeněk. "Interakce kovových iontů v bioorganickém prostředí; kvantově-chemická a molekulově-mechanická výpočetní studie." Doctoral thesis, 2012. http://www.nusl.cz/ntk/nusl-309504.

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Interactions of Metal Cations in Bioorganic Environment Computational Study Using Quantum Mechanics and Molecular Mechanics Tools Zdeněk Futera Biologically relevant interactions of piano-stool ruthenium(II) complexes with ds-DNA are studied by QM/MM computational technique. The whole re- action mechanism is divided into three phases - hydration of [RuII (η6 - benzene)(en)Cl]+ , consequent binding DNA and final intra-strand cross-link formation between two adjacent guanines. Free energy profiles of all reactions are explored by QM/MM MD umbrella sampling approach where the Ru(II) complex is de

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Římal, Václav. "NMR studium oligonukleotidových struktur." Doctoral thesis, 2018. http://www.nusl.cz/ntk/nusl-386770.

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Title: NMR Study of Oligonucleotide Structures Author: Václav Římal Department: Department of Low-Temperature Physics Supervisor: Prof. RNDr. Helena Štěpánková, CSc., Department of Low- Temperature Physics Abstract: The dynamics of nucleic acids plays a fundamental role in the interactions with proteins. Some processes are governed by changes in DNA stability and flexibility caused by sequence alterations or chemical modifications without substantial structural impact. We employed line-shape analysis of variable-temperature 1H NMR spectra to deeply investigate the melting transition of DNA str

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Skružný, Petr. "Analýza vybraných sekundárních struktur nukleových kyselin." Master's thesis, 2010. http://www.nusl.cz/ntk/nusl-296541.

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This work introduces a database of experimentally verified structures of nucleic acids which were collected from published scientific literature. The database is annotated and the structures are analysed from the perspective of quality and it was found that the experimentally obtained data are not always sufficient - their supporting evidence is often limited and their quality is not convincing. This work also discusses some of the problems, that can be encountered when the structures are experimentally probed. Contents of the database were compared to the RFAM database and despite of its smal

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Kukačka, Zdeněk. "Výzkum Struktury β-N-Acetylhexosaminidasy z Aspergillus oryzae". Master's thesis, 2011. http://www.nusl.cz/ntk/nusl-298082.

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in English β-N-acetylhexosaminidase (EC 3.2.1.52) belongs to exoglycosidase, and is one of the most abundant enzymes found in organisms from bacteria to human. The fungal β-N-acetylhexosaminidase from Aspergillus oryzae is composed of propeptide and catalytic domain. The propeptide is noncovalently associated with the catalytic domain of the enzyme. Propeptide is essential for the enzyme activity. While the structure of the catalytic domain was desidned by homology modeling, the structure of the propeptide has not been resolved yet. In this study, the position where the propeptide is associate

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Krunclová, Tereza. "Výzkum Struktury β-N-Acetylhexosaminidasy z Penicillium oxalicum". Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-308282.

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in English β-N-Acetylhexosaminidase (EC 3.2.1.52) is exoglycosidase, which exhibits the unique properties in the filamentous fungi. Enzyme from these organisms are dimeric, inducible and secreted extracelluary. It is expresed as preproprotein, consists of a signal sequence, a large propeptid and a catalytic subunit. Although the enzyme is widely distributed, its structure differs in varies organisms. Bacteria have only monomeric hexosaminidase. Human enzymes are dimeric as well as fungal, but only hexosaminidase from filamentous fungi have the catalytic subunit noncovalently associated with th

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Kukačka, Zdeněk. "Charakterizace struktury proteinů pomocí chemického zesítění a hmotnostní spektrometrie." Doctoral thesis, 2015. http://www.nusl.cz/ntk/nusl-334650.

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Some proteins require presence of their specific ligand, cofactor or prosthetic group for their activity. Binding of this specific molecule can cause conformational changes which permit to perform their function. In some occasions the identification of conformational changes could be really challenging task. In this thesis we describe the novel approach for monitoring structural changes in proteins using chemical cross-linking and high resolution mass spectrometry and its application on model calmodulin system. It is demonstrated that analysis using isotope-labelled cross-linking agents enable

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Vaňková, Pavla. "Strukturní charakterizace intracelulární formy myšího Nkr-p1a proteinu." Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-343063.

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NK cells are a component of innate immunity system, which is derived from lymphoid progenitor. By a sophisticated receptor repertoire, which is expressed on their surface, they provide a surveillance against pathogenic, virus infected or tumour cells. Simultaneously they produce cytokines, thereby are involved in adaptive immune response. This work is focused on the study of structure of mice soluble mNkr-p1a isoform. Recently this short isoform was identified at the transcriptional level by a member of our laboratory and it is designated as isoform 2. The aim was to produce mNkr-p1a iso2 prot

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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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Růžičková, Barbora. "Studium struktury receptoru DCL-1 pomocí hmotnostní spektrometrie." Master's thesis, 2013. http://www.nusl.cz/ntk/nusl-324111.

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DCL-1 (CD302) is a type I transmembrane C-type lectin receptor, which is expressed on monocytes, macrophages, granulocytes and dendritic cells. However, its extracellular domain lacks the amino acids motives essential for carbohydrate binding in the presence of calcium ions, suggesting that it does not have the classic binding capacity found in other C-type lectin receptors such as the mannose receptor. No exogenous or endogenous ligands have been identified yet, though. Due to internal colocalization with F-actin we can assume, that this unconventional lectin receptor plays a role not only in

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Kohúteková, Soňa. "Molekulové krystaly pro NLO aplikace - sloučeniny 1H-pyrazol-karboxamidinu." Master's thesis, 2018. http://www.nusl.cz/ntk/nusl-380874.

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Title: Molecular crystals for NLO applications - compounds of 1H-pyrazole-carboxamidine Author: Bc. Soňa Kohúteková Department: Department of Inorganic Chemistry Supervisor: prof. RNDr. Ivan Němec, Ph.D. Abstract: The aim of this diploma thesis is preparation and characterisation of novel compounds of 1H-pyrazole-carboxamidine in consideration of their potential application in the field of nonlinear optics. This thesis is focused on preparation of crystalline salts or adducts combining 1H-pyrazole-carboxamidine with selected inorganic and organic acids. Prepared materials were characterised ma

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Kallistová, Anna. "Strukturní a chemické aspekty vzniku fosfátů vápníku v zubní sklovině." Doctoral thesis, 2018. http://www.nusl.cz/ntk/nusl-372829.

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Tooth enamel is the hardest and most resistant highly mineralized inorganic component in mammalian bodies that significantly affects both the life quality and expectancy of an indi- vidual. Its specific qualitative properties are given by the biomineralization process responsible for its formation. In this process the mineralization of hydroxyapatite (HAp), the only inor- ganic phase composing the mammalian hard tissues, is controlled by activity of enamel-forming cells ameloblasts and their products. Over the past years, the studies of enamel matrix pro- teins, their structure, composition an

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Rosůlek, Michal. "Studium vlivu kofaktoru na strukturu proteinu pomocí hmotnostní spektrometrie." Master's thesis, 2015. http://www.nusl.cz/ntk/nusl-331768.

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Bacterial protein WrbA from E. coli is the founding member of a new family of FMN-dependent NAD(P)H oxidoreductases, forming a functional and structural bridge between bacterial flavodoxin and certain mammalian NAD(P)H:quinone oxidoreductase. For these reasons, protein WrbA is recently intensively studied using various analytical and computing methods. Protein WrbA participates in the protection of cells against oxidative stress, but precise function of the protein WrbA in vivo is still unknown. Protein WrbA forms multimers in solutions. In μM concentrations and at low temperature (4 řC) the p

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TRUHLÁŘ, Martin. "Vliv různého hospodaření na produkci, strukturu a chemické složení nadzemní biomasy v povodí Mlýnského potoka." Master's thesis, 2015. http://www.nusl.cz/ntk/nusl-188466.

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The aim of the thesis is to assess the changes in production and structure of surface biomass (the proportion of grasses, clovers and other plants) and its chemical compound in scythed and pastured grass areas in the monitored areas in the Mlýnský potok basin in years 2012 and 2014. The area is situated on the right bank of Lipno dam in Pasečná land register, 784 820 meters above sea-level. There were established three permanent sampling points in the pastured as well as scythed areas in the Mlýnský potok basin. Four samples of biomass from the area of 1 sq m were collected in each of these sa

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Hudecová, Jana. "Teorie a aplikace optických spektroskopických metod pro strukturní studie molekul." Doctoral thesis, 2018. http://www.nusl.cz/ntk/nusl-389127.

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Title: Theory and application of optical spectroscopic methods for structural molecular studies Author: RNDr. Jana Hudecová Department / Institute: Institute of Organic Chemistry and Biochemistry Supervisor of the doctoral thesis: Prof. RNDr. Petr Bouř, DSc. Abstract: In the thesis, methods of the chiroptical spectroscopy (Raman optical activity, electronic and vibrational circular dichroism, circularly polarized luminescence) were utilized to obtain information on structure of chiral molecules. In four main projects, we focused on improving accuracy of quantum-chemical computations used for i

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POUZAR, František. "Vliv různého hospodaření na produkci, strukturu a chemické složení nadzemní biomasy v povodí Jenínského potoka." Master's thesis, 2015. http://www.nusl.cz/ntk/nusl-188465.

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Strmeň, Timotej. "Hmotnostní spektrometrie s chemickou ionizací za atmosférického tlaku při nízkých průtocích: konstrukční řešení a využití." Doctoral thesis, 2020. http://www.nusl.cz/ntk/nusl-436920.

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(EN) The first part of the thesis describes the ionization reactions in the APCI source in the presence (enclosed configuration) and absence (open configuration) of the ion source housing. Commercial APCI source was modified and used in enclosed, as well as open configuration. All other parameters were kept the same (including the source geometry). In the positive mode, the biggest differences were observed for non-polar analytes dissolved in aprotic solvents like toluene, chloroform and carbon disulfide. Protonated species were dominant in the open configuration, while radical cations were mo

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Ptáčková, Renata. "Aplikační potenciál modifikačních metod (chemická činidla, foto-nanosondy) a hmotnostní spektrometrie pro studium struktury proteinů a jejich vzájemných interakcí." Doctoral thesis, 2015. http://www.nusl.cz/ntk/nusl-336161.

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A comprehensive understanding of physiological role of proteins requires knowledge of their three-dimensional structure, dynamics and protein-protein interactions. Chemical cross-linking in combination with mass spectrometry represents an alternative approach to standard methods for protein structure elucidation (X-ray crystalography, NMR spectroscopy) and enables characterization of interaction interface within protein complexes in their native states. The presented thesis is mainly focused on novel cross-linking methodology based on the in vivo incorporation of methionine analog with photo-r

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Ječmen, Tomáš. "Cytochrom P-450: studium struktury a interakcí metodami chemické modifikace, foto-iniciovaného síťování a hmotnostní spektrometrie." Doctoral thesis, 2015. http://www.nusl.cz/ntk/nusl-334652.

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ABSTRACT Mixed function oxygenase system participates in biosynthesis of endogenous and metabolism of exogenous substances (e.g. drugs or chemical procarcinogens) in an organism. Substrates are biotransformed by terminal oxygenases - cytochromes P450 (P450). Catalytic properties of certain P450s (e.g. studied isoform 2B4) are altered in the presence of a redox partner - cytochrome b5 (cyb5). Both cytochromes are anchored by hydrophobic domains in a lipid membrane of endoplasmic reticulum whereas their catalytic domains are exposed to cytosol. Two zero-length cross-linking approaches were emplo

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Šmigová, Jana. "Vztah vyšších chromatinových struktur a genové umlčování." Doctoral thesis, 2012. http://www.nusl.cz/ntk/nusl-305928.

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Semelková, Lucia. "Příprava derivátů pyrazinu jako potenciálních antituberkulotik. (Studium vztahů mezi chemickou strukturou a biologickou aktivitou)." Doctoral thesis, 2017. http://www.nusl.cz/ntk/nusl-368840.

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Charles University, Faculty of Pharmacy in Hradec Králové Department: Department of Pharmaceutical Chemistry and Pharmaceutical Analysis Candidate: Mgr. Lucia Semelková Supervisor: Prof. PharmDr. Martin Doležal, Ph.D. Consultant: PharmDr. Jan Zitko, Ph.D. Title of Doctoral Thesis: Preparation of Pyrazinamide Derivatives as Potential Antituberculotics (Study of Structure Activity Relationships) This doctoral thesis is focused on search for novel pyrazinamide derivatives with potential antitubercular activity. The theoretical part summarizes issues connected with tuberculosis and its epidemiolog

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Hoffmann, Luise. "Struktur und Biosynthese von Collinolacton aus Streptomyces sp. und Beiträge zum Screening neuer Wirkstoffe." Doctoral thesis, 2006. http://hdl.handle.net/11858/00-1735-0000-0006-AEA6-0.

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Šedivý, Lukáš. "Difúze přirozených defektů a příměsí v CdTe/CdZnTe." Master's thesis, 2012. http://www.nusl.cz/ntk/nusl-305137.

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Title: Diffusion of native defects and impurities in CdTe/CdZnTe. Author: Lukáš Šedivý Author's e-mail address: luky.sedivy@seznam.cz Department: Institute of Physics of Charles University Supervisor: Doc. Ing. Eduard Belas, CSc. Supervisor's e-mail address: belas@karlov.mff.cuni.cz Abstract: In this thesis, the influence of structural defects on the electrical and de- tection characteristics of CdTe material was investigated. The performed research fo- cused on the reduction of structural defects in the material by annealing in Cd or Te vapor, while preserving acceptable features for X-ray an

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Zeman, Jakub. "Vazba eIF3 v komplexu s eIF5 a eIF1 na ribosomální podjednotku 40S je doprovázena dramatickými strukturními změnami." Doctoral thesis, 2019. http://www.nusl.cz/ntk/nusl-405667.

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In eukaryotic translation, eukaryotic initiation factors (eIFs) are at least as important as the ribosome itself. Some of these factors play different roles throughout the entire process to ensure proper assembly of the preinitiation complex on mRNA, accurate selection of the initiation codon, errorless production of the encoded polypeptide and its proper termination. Perhaps, the most important factor integrating signals from others and coordinating their functions on the ribosome is eIF3. In Saccharomyces cerevisiae, eIF3 is formed by five subunits. All these subunits contain structural moti

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