National Repository of Grey Literature 10 records found  Search took 0.00 seconds. 
Removal of sulfonamide antibiotics using advanced oxidation processes
Fučík, Jan ; Suková, Petra (referee) ; Švestková, Tereza (advisor)
This thesis deals with a present problem of increasing concentrations of pharmaceuticals and other micropollutants in aquatic environment, because these micropollutants are not treated sufficiently in conventional wastewater treatment plants. It is necessary to develop new technological processes, that are able to treat these pollutants sufficiently. One of the options is that conventional methods would be complementary with advanced oxidation processes (AOP), which would work as a tertiary cleaning process on wastewater treatment plants. The actual knowledge, principle of the plasma discharge and principle of analytical methods is described in theoretical part of the thesis. In experimental part of the thesis, the plasma discharge is used for removal of sulfonamide antibiotics (sulfamethoxazole), as the representative of AOP. Samples were taken during the plasma treatment of the model solution of sulfamethoxazole. These samples were analysed by LC-ESI-MS as the appropriate analytical method. An efficiency of degradation of sulfamethoxazole in different solutions (neutral, acidic and alkaline) was evaluated in this bachelor thesis. A suitability of plasma application on degradation of sulfonamide antibiotics was reviewed by comparing with other AOP.
Determination of selected drugs in water
Tran Xuan, Tiep ; Švestková, Tereza (referee) ; Vávrová, Milada (advisor)
Submitted thesis tackles the problem of numerous of antibiotics in waste water. Specifically, trimethroprim azithromycin and clarithomycin. In all of those cases we are dealing with a massive ecological threat at hand, causing harm to the enviroment. To isolation the specific kind of antibiotics the method of SPE was chosen by prior consultation with the supervisor. The method of high performance liquid chromatography with mass spectrometry detection was deemed superrior for the pinpointing of the exact pharmaceuticals in waste watters. The waste waters in and out flow was observed for twelve days with the maintainance of all necessary procedures listed above at water treatment plants Brno-Modřice.
Determination of selected substances in phytopharmaceuticals
Hroncová, Michala ; Švestková, Tereza (referee) ; Vávrová, Milada (advisor)
Thyme, linden and cuban oregano are plant that have positive effect of upper respiratory tract infections. The most common are used in the form of teas and syrups. In this thesis were analyzed methods, which are used to specify substances in plants. It describe methods like stem distillation, SPME and GC/MS. The main aim of the thesis was found out subsances, which occur in herbs. Thymol was the substance which was found in every analyzed herb. The thyme contain o-cymen, in mixture of thyme was proofed thymol, borneol, 1-octene- 3- ol, linalol, estragol a 4- terpeneol. The linden has substances estragol a - terpinen. Characteristic substancies od the mixture of linden were o-cymen, estragol a - terpinen. In the cuban oregano were proofed – pinen, camphor, - terpinen. The method SPME was used to analyzed substances in syrup and main substances were thymol a -elemen.
The issue of determining antidepressants
Kočnar, Michal ; Švestková, Tereza (referee) ; Vávrová, Milada (advisor)
The presented bachelor thesis is focused on the issue of antidepressants and the determination of two of their representatives, paroxetine and citalopram, in sewage taken from three municipal waste water treatment plants. In the theoretical part of this study, antidepressants are generally characterized, more specifically two representatives of selective serotonin reuptake inhibitors, paroxetine and citalopram. Subsequently, the methods of determination of these analytes in waste water are presented. The experimental part deals with determination of selected substances in real samples of waste water. The analytes were isolated from the matrix by solid phase extraction and determined by ultra performance liquid chromatography with ultraviolet spectrophotometric detection. Paroxetine was quantified in all samples, citalopram was not able to quantify, in some samples even to detect.
The electromigration methods and their use in the analysis of drugs.
Tučková, Dominika ; Švestková, Tereza (referee) ; Řezáčová, Veronika (advisor)
This bachelor thesis deals with the determination of septonex, effective component in medical agents, using capillary isotachophoresis. The main aim is optimization of this method for fast, sensitive and inexpensive determination of septonex. In bachelor thesis chemical and physical properties of septonex are introduced as well as its negative and positive properties, which can be used in medicine, and summary of possible methods of analysis. Further this thesis gathers information about drugs containing septonex and available on Czech market. Following chapters of the thesis summarize theory of electromigration methods, their principles, analytical devices and their use for septonex analysis. Finally, the thesis presents optimal conditions for analysis and results of determination of septonex in drug Septonex spray, which is available on Czech market, using capillary isotachophoresis. Content of determined septonex is compared to amount of septonex contained in this drug, which is declared by producer, in this thesis.
Determination of antibiotics in the wastewater
Suková, Petra ; Švestková, Tereza (referee) ; Vávrová, Milada (advisor)
This thesis deals with problem of antibiotics, substances used in the prevention and treatment of infectious diseases in human and veterinary medicine. Have been discussed aminopenicillins antibiotics from the group of antibiotics, particularly ampicillin and amoxicillin, which are one of the most frequently prescribed antibiotics in both the Czech Republic and in the world now. Drug substances together with wastewater pass into the wastewater treatment plant where sewage process does not remove the drug from the treated water entirely. Drug substances can be penetrate into the other components of the environment in the result, especially in surface water and soil, where they can have adverse effects on organisms living there. For the isolation of analytes from samples of wastewater was selected solid phase extraction (SPE). For final analysis of antibiotics was used method of ultra-high performance liquid chromatography with UV-VIS detection with diode array detector and method of liquid chromatography with mass spectrometric detection. Based on the optimization of analytical techniques was especially ampicillin chosen as analyte isolated from the matrix of waste water. Analysis of the wastewater was conducted for a total of four days of influent and effluent wastewater treatment plant in Brno-Modřice and wastewater treatment plant which is situated in area of the Veterinary and Pharmaceutical University in Brno.
Determination of hormones in wastewater
Zouharová, Kamila ; Švestková, Tereza (referee) ; Vávrová, Milada (advisor)
The presented theoretical and practical study was focused on a single unit of drugs – hormones. In the present study were characterized in detail hormones as drugs or medical ressource and their mode of effect on the human body. Another important part of this study was focused on the evaluate of the incidence of estrogens in the environment and their possible impact on the aquatic ecosystem, mainly for waste water. The last part of study was processed analytical problems of determination of hormones. There were introduced pre-analytical and analytical methods – methods of isolation of hormones from the waste water and methods of thein final determination, which were based mainly on the separation processes.
Distribution of synthetic fragrances into the aquatic ecosystem
Freithová, Štěpánka ; Švestková, Tereza (referee) ; Vávrová, Milada (advisor)
Synthetic fragrances are part of many consumer products, from which they get to waste water and to water recipient due to imperfect cleaning. Musk compounds can be found in almost every parts of nature environment. Purpose of this bachelor thesis was assesment of selected representatives linear musk compounds, concretely citronellol, isobornyl acetate, allyl cyklohexyl propionate and hexylcinnamic aldehyde. This analytes were determined in waste water in inflow and outflow from wastewater treatment plant in Brno-Modřice and wastewater treatment plant in area Veterinary and Pharmaceutical university Brno. Analytes were extracted by using method of solid phase microextraction, final assesment was done method of gas chromatography with mass spectrometry detection. Results were evaluated and it was found, that musk compounds are present in waste water in concentration range from 0,01 to 3,6 ng/ml.
Determination of linear synthetic aromatic compounds in abiotic and biotic matrices
Švestková, Tereza ; Čáslavský, Josef (referee) ; Vávrová, Milada (advisor)
Synthetic musk compounds are artificial organic compounds with a smell similar to the odor of a natural musk. The most recently discovered and also the least known group of artificial musks is linear musk compounds. These substances are now often used in cosmetics, personal care products, detergents and various cleaning products. They have leaked into all the major environment components, especially into the hydrosphere. There has been great attention drawn to synthetic musk compounds in the last few years because of their environmental impact. The aim of this thesis is to identify twelve linear musk compounds (linalool, 2-cyclohexylethanol, fresco menthe, citronellol, HSA, isobornyl acetate, arocet, aroflorone, allyl cyclohexyl propionate, lilial, isoamyl salicylate and hexylcinnamic aldehyde) in waste water samples. The samples were taken at three different waste water treatment plants (WWTP) in South Moravian region (WWTP Brno-Modřice, WWTP Luhačovice and WWTP Hodonín). Each of these treatment plants has a different equivalent number of inhabitants. At first, a working method was optimized, then applied on real waste water samples. Solid-phase microextraction (SPME) technique was used for the extraction of analytes. Gas chromatography–mass spectrometry (GC/MS) was then used for identification and quantificaton of the studied compounds.
Study of influence degradation to fotovoltaic cells properties
Švestková, Tereza ; Sládek, Petr (referee) ; Zmeškal, Oldřich (advisor)
The thesis examines degradation of photovoltaic cells and modules. Degradation assessment was based on the data gathered from the photovoltaic system installed at the Pedagogical Faculty of Masaryk University in Brno, Poříčí 31. The research focuses on influence of external factors on the amount of power supplied to the grid by the system. Theoretical part of the thesis summarizes state-of-the-art knowledge about photovoltaic conversion and devices taking the advantage of the principle. The first part of the thesis describes production and application of photovoltaic cells and their impact on the environment. Second part of the thesis deals with the principle of photovoltaic conversion. Next part lists materials used for the production of photovoltaic cells and the process of encapsulation. The fourth part summarizes knowledge about degradation of photovoltaic panels. Experimental part of the thesis statistically analysis the data gathered from the above mentioned power plant. Influence of degradation factors (surface temperature of PV panel, air temperature, wind velocity and radiation intensity) on effectiveness of energy conversion was examined in particular. The published results can be applied on analysis of new projects and/or used for modification of production technological processes.

Interested in being notified about new results for this query?
Subscribe to the RSS feed.