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Photocatalytic concrete screeds with self-cleaning and antimicrobial function
Bíbová, Hana ; Šubrt, Jan ; Pližingrová, Eva ; Jakubičková, M. ; Sázavská, T. ; Dohnálek, P. ; Hykrdová, Lenka ; Jirkovský, Jaromír
Photocatalytic concrete screeds with self-cleaning and antimicrobial function have been developed and tested. These building materials contain sand grains with deposited composite TiO2/SiO2 layers. Two types of the screeds, grey and white, were prepared and their photoactivity and material characteristics were compared. Commercial TiO2 photocatalysts from several manufacturers were employed. Effects of different parameters, such as temperature of the coated sand calcination, humidity, and surface abrasion, were followed. Mechanical properties of the screeds were analyzed by SEM/XRD microscopy. Photocatalytic activity was tested by means of NOx oxidation (ISO norm 22197-1/2007). Antibacterial activity was evaluated by modified ISO norm 27447/2009 with Bacillus subtilis as a model organism.
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Professional Responsibility of Auditors and Tax Advisors
Dohnálek, Pavel ; Molín, Jan (advisor) ; Králíček, Vladimír (referee)
The primary objective of this diploma thesis, which focuses on the professional responsibility of auditors and tax advisors, is to provide a comprehensive view of this issue. The diploma thesis is divided into six parts. The first chapter describes general responsibility with an emphasis on professional responsibility. The second and third parts are devoted to the profession of auditors. The second chapter describes the profession of external and internal auditors in detail, and the third chapter deals with their professional responsibility, broken down into a moral and legal level of responsibility. The fourth and fifth chapters are devoted to the profession of tax consultancy, which is discussed in detail, followed by a part devoted to the professional responsibility of tax advisers. The last part of the thesis compares the professional responsibilities of the professions of auditors and tax advisors.
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