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Diagnostics of genom conditioned diseases with the use of micro- and nanoparticles
Mondeková, Věra ; Prášek, Jan (referee) ; Provazník, Ivo (advisor)
The bachelor´s thesis discusses possibilities of viral genome´s detection through use of biosensors, more specifically through use of magnetic particles. The introductory part consists of brief characteristic of viruses, mentioned as originator of genom conditioned diseases, followed by chapters related to selected methods of nucleic acid´s extraction and analysis. The main part is dedicated to magnetic particles. The practical part of thesis deals with possibility of use of biosensors in specific viral pathogen´s detection, selection of biocompatible molecules suitable for magnetic particle modification and description of specific DNA sequence isolation procedure through use of magnetic particles.
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Magnetic particles as a reversible carrier for enzyme electrodes
Janíček, Zdeněk ; Žeravík,, Jiří (referee) ; Skládal,, Petr (advisor)
Master’s thesis contains information about the enzymes, biosensors, enzyme biosensors and magnetic particles. Cholinesterasa (ChE) is the generally name for the two related enzymes, mutually differing appearance and biological functions. Acetylcholinesterasa (AChE) is necessary for the transmission of nervous excitement. AChE is located at cholinergic synapses, where is the hydrolysis of the neurotransmitter acetylcholine and this termination by the nervous excitement. Butyrylcholinesterasa (BChE) is related to AChE and it is present in serum. Experimental part was focused on electrochemical biosensors with cholinesterase enzyme using magnetic particles for reversible reconstruction layer. Cholinesterase immobilization was carried out on the magnetic particles by covalent binding after glutaraldehyde activated. The measurement of activity take place with acetylthiocholin as a substrate in a flow system, magnetic particles were captured before the platinum electrode and produced by thiocholin is detected amperometric. The aim was to measure inhibition of AChE. Significant inhibition ChE is caused by certain drugs and pesticides based on organophosphates. There was tested by inhibition of AChE pesticide dichlorvos. Emphasis was on finding possible experimental conditions for the creation of the automated procedure to measure the AChE activity, which was based on auto-injector and pumps of Gilson, together with a 735 programme for the definition of the working configuration, preparation of measurement scripts and implementation of application methods.
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Natural patterns in robotics
Juřicová, Vendula ; Augste, Jan (referee) ; Knoflíček, Radek (advisor)
This bachelor´s thesis is focused on the part of the robotics, which is inspired by nature. At first, the reader is introduced into the theory of interdisciplinary terms BIO – ING. The central part is divided in two parts: the inspiration by man and inspiration by animals. In the chapter about man, there are the main biomechanical features introduced as well as the algorithms that are used in the robotics with the human prototype. Some biomechanical constructions and humanoid robots follow. Biomechanical constructions that are inspired by animals dominate the second part. The conclusion includes (among others) a technical and a philosophical reflection on the future of the robotics.
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Functionalized nanostructures
Váňa, Rostislav ; Kvapil, Michal (referee) ; Kolíbal, Miroslav (advisor)
This thesis deals with functionalized nanoparticles. In the first part there are mentioned materials suitable for a functionalization, the usage of functionalized nanoparticles in medicine and biochemistry and detection methods of changes of optical properties. In the second part changes of optical properties after functionalization are investigated by spectroscopic ellipsometry and FTIR spectroscopy.
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Unique Properties of Amalgam Electrodes
Josypčuk, Bohdan ; Josypčuk, Oksana
Depending on metal-mercury ratio and on the method of preparation amalgam can be: 1) solid compact; 2) paste; 3) liquid; 4) monocrystalline; 5) porous; 6) powdered. High potential of hydrogen overvoltage is observed on amalgam electrodes and it is comparable with one on Hg-electrodes. Another important benefit is the possibility to prepare amalgam electrode, detector or reactor of required size and shape. From amalgams have been prepared and tested many types of electrodes for batch and flow-through systems. The diversity of amalgam materials provides some unique electrochemical properties of electrodes, the most important of which are described in this paper.
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Biosensors for Environmental Monitoring and Biomedical Applications
ŠTOFIK, Marcel
Study of biosensors has become an essential part of research in biotechnology. Biosensors as fast, portable, highly sensitive, and low-cost bioanalytical detection devices have been utilized in many fields of human activity. The first part of the presented work focuses on electrochemical biosensors for rapid environmental screening of herbicides as water pollutants. A sol-gel immobilization method for a photosystem II (PSII) complex is studied in order to enhance the sensitivity and the signal strength and stability of a PSII-based biosensor. Computer simulations of a PSII biosensor are employed with the aim to find out how the immobilization membrane properties influence the biosensor parameters. Newly developed immobilization by a thin-layer membrane based on the results of computer simulations and revised measurement protocols are presented. The second part of the work is devoted to synthesis and electrochemical detection of newly developed metal labels for electrochemical immunosensors. The synthesis of dendrimer-encapsulated silver nanoparticles and biorecognition properties of biotin-nanocomposite conjugates are discussed. For detection of synthesized labels, a microfluidic detector was manufactured and tested and different approaches to packing of a microfluidic chip employing polydimethylsiloxane (PDMS) were investigated. Newly designed microstructures for a microfluidic separator of magnetic beads (MBs) were studied by computer simulations. The separator was made and trapping of MBs for the further employment in MBs-based immunoassays are presented
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