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Analysis of substances potentially dangerous to humans found in lipsticks
Horáková, Kristýna ; Kučerová, Simona (referee) ; Diviš, Pavel (advisor)
The diploma thesis deals with the determination of the content of risk elements and parabens in lipsticks and the assessment of possible negative effects on human health associated with the use of lipsticks. Parabens were analyzed by high performance liquid chromatography with diode array detection (HPLC-DAD). Aluminum, cadmium and lead were analyzed on an inductively coupled plasma mass spectrometer (ICP-MS). The mercury content was determined using an atomic absorption spectrometer with an UV detector (AAS-UV). A total of 36 lipstick samples from 22 cosmetic brands were selected for analysis, with a savings price in the range of CZK 50–1500. Based on the measured metal concentrations, the hazard quotients (HQ) for individual metals as well as the total hazard index (HI) for the sum of all metals were calculated. Metal concentrations in lipsticks were further processed using Kruskall-Wallis Anova to divide samples according to price categories. The relationship between the content of individual metals and the purchase price has not been proven. Furthermore, a Kolmogór-Smirnov test was performed on these data to compare groups with vegan and not vegan composition. The content of aluminum, which was about 2.5 times lower in vegan cosmetics, proved to be statistically significant for this distribution. Parabens were detected in the minimum number of lipsticks examined, but in some cases information on the content of parabens was missing on the product packaging.
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Sterile Place
Bražina, Jan ; Lukáš,, Hofmann (referee) ; Ambrůz, Jan (advisor)
The bachelor's thesis deals with the study of the boundary between man, the supernatural and the object. The resulting spatial installation and video follow the relationship between the human body and the jwho "inhuman accessories".
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Housing for seniors
Vrbický, Josef ; Donaťák, Vladislav (referee) ; Donaťáková, Dagmar (advisor)
The subject of the diploma thesis is the design of a new building of a free-standing building for housing for the elderly, in the form of project documentation for the construction. The building is designed brick with monolithic reinforced concrete ceilings. Perimeter masonry is designed from ceramic brick blocks th. 300 mm supplemented by contact insulation system ETICS th. 200 mm, which will be provided with silicone plaster with a grain size of 1.5 mm. The internal load-bearing masonry is designed from acoustic ceramic brick blocks of thickness 250 and 300 mm. The partitions are designed from acoustic partitions. The ceilings are designed with a heavy floating floor with excellent acoustic properties. The roof above the two-storey part is designed as a single-skin flat with extensive greenery. Above the three-storey part is a hipped roof made of lattice trusses and sheet metal roofing. The windows are designed with plastic insulating triple glazing. The balcony railing is designed for aluminum with safety glass filling. The building is heated by a gas boiler and controlled ventilation is designed throughout the building using a central recuperation.
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Apartment house
Vrbický, Josef ; Donaťák, Vladislav (referee) ; Donaťáková, Dagmar (advisor)
The subject of the bachelor thesis is the design of a new building of a detached apartment building in Holice, in the form of project documentation for construction. The building is designed with bricks and ceilings made of beams and ceramic inserts. The peripheral masonry is designed from ceramic brick blocks th. 300 mm completed with contact insulation system ETICS th. 200 mm, which will be equipped with silicone plaster 1,5mm. The internal load-bearing masonry is designed from acoustic ceramic brick blocks th. 250 and 300 mm. Partitions are designed from acoustic partition walls. On the ceilings, a heavy floating floor with excellent acoustic properties is designed. The roof is designed flat single-skin with thermal insulation of mineral wool and with waterproofing layer made of bitumen modified SBS strips laid in two layers. Balcony railing is designed aluminum with safety glass paneling.
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Modern Materials for Automotive Industry
Vaníček, Jan ; Fojtášek, Jan (referee) ; Hejtmánek, Petr (advisor)
This work is focused on the description of conventional and unconventional materials that are used to build a car. Individual types of materials are sorted according to their application and characterized in terms of properties and real use. The end of each chapter is devoted to possible future trends.
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Influence of technological process of powder painting on the quality of silver-plated components in gas insulated substation - GIS
Nováková, Eliška ; Prosecký, Vít (referee) ; Kubíček, Jaroslav (advisor)
The thesis deals with the topic of silver coating on the inner surface of the tubes made of aluminum alloy EN AW-6101B. The high affinity of the aluminum for the oxygen, the heterogeneity of the surface and the presence of the hydrogen in the base material, are the properties which hinder the formation of metallic coating on the surface of the aluminum alloy. The saturation of the base material with the hydrogen, e.g. due to the pretreatment of the surface or by the process of creating of coatings, may under certain conditions cause the defects of the silver coating in the form of the bubbles (blisters). Other factors that may affect the quality of the silver coating are the way of creating of the interlayer and the conditions for the electrolytic deposition of the silver.
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Production of wing rib
Ivančo, Radek ; Peterková, Eva (referee) ; Císařová, Michaela (advisor)
The thesis presents a proposal of production of a molded part from the aluminum alloy of group 2024 (dural). Based on the theoretical study and the requirements of the company was designed a cutting tool with a rounded edge for cutting the unfolded shape of the part on the eccentric press LEN 40 C. A new forming tool from textite material for fluid press Quintus QFC was designed. The parts of the cutting tool were designed primarily from normalized (purchased) parts. Manufactured punch and shearing die are made of commonly available tool steels and processed on the attached drawings. The result of the thesis is a recommendation to invest in a specialized workplace for the production of a unfolded shape and reduction of laboriousness adjusting after forming.
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Kindergarten
Marek, Tomáš ; Donaťák, Vladislav (referee) ; Donaťáková, Dagmar (advisor)
The subject of the diploma thesis is the elaboration of project documentation for the implementation of the new civic amenities of the Nursery School in the cadastral area of Plácky in the territory of the town of Hradec Králové. The building is designed as a stand alone divided into 4 segments with two above-ground floors. Kindergarten consists of 3 separate departments with a total capacity of 60 children and 1 unit for hobbies with a capacity of 20 children and their facilities. The object is based on the base passages. All brick structures are made of brick blocks Porotherm and the heat insulation is added to the perimeter shell. The internal staircase is monolithic, reinforced concrete and external prefabricated steel. The object is roofed with a flat roof and the support element consists of reinforced concrete pre-prestressed panels SPIROLL. Drawing part is processed in ArchiCAD program, visualizations are processed in Lumion program.
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Porosity during welding aluminous alloys
Hájková, Alena ; Daněk, Ladislav (referee) ; Sigmund, Marian (advisor)
This thesis deals with the problem of occurrence of porosity in aluminous alloys and the methods of their repair in the company IFE. Theoretical part is aimed on the current state of porosity and the ways in which the be pores can be repaired. Used technologies of repairs are TIG welding and cementing. The practical part consists of experiment in which is used a method of cementing on specific part.
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Production technology for a vacuum mold
Ponka, Ondřej ; Bartoš, Tomáš (referee) ; Zemčík, Oskar (advisor)
The master thesis deals with the design and production of the mold for vacuum forming. Specifically, how the existing and new mold materials affect their design and, consequently, their production technology. The thesis contains a brief description of the principle of vacuum molding. Technological and design principles of designing molds. Furthermore, the realization of the solution variants and the simulation of their production. The solved variants are subsequently evaluated from a technical and economic point of view.
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