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Hair as a bioindicator of contamination of risk metals
Zmijová, Marie ; Řezáčová, Veronika (referee) ; Zlámalová Gargošová, Helena (advisor)
The use of hair as a bioindicator of environmental contamination by risk elements is becoming more and more common. This bachelor thesis deals with the use of this matrix for analysis using the voltammetric method. It focuses on the optimization of the method for determining the concentration of cadmium, copper, lead and zinc in real hair samples and monitors the effects on the incorporation of these elements into the hair fiber. The presence of zinc and copper was confirmed in all samples analyzed. Cadmium could only be quantified in one sample. The effect of gender and age on the concentration of elements has not been demonstrated. Concentration of lead has been linked to smoking, with higher concentrations found in smoker’s hair than in non-smoker’s.
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Untitled
Sláma, Matěj ; Poliačková, Martina (referee) ; Mazanec, Martin (advisor)
The subject of the bachelor's thesis is hair as a phenomenon, image, trauma, when in detail I explore this biological material on the basis of personal experience and as part of a series of experiments in the created "hair laboratory". Thematically, I focus on different concepts of hairstyle -- image vs. examine of biological glitches of hair growth. I organize a set of records, drawings, post-productions, objects or found materials into a database, which also became the inspiration for the actual installation of the project.
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Plants for no shampoo (no poo) hair washing
ČERVENÁ, Simona
The bachelor's thesis "Plants for no shampoo (no poo) hair washing" focuses on the composition of the Czech and Ayurvedic no-poo mixtures and analyses their botanical and ecological characteristics by individual plant species. The latter part of the thesis evaluates the respondents' experience by using a quantitative research method - a survey. The domestic market includes 15 no-poo mixtures from 49 plant species, from which 34 were Czech and 15 were Ayurvedic. The most used plant species for hair washing on the Czech market were these Ayurvedic species: Acacia concinna, Emblica officinalis, Sapindus mukorossi, Aloe barbadensis, Trigonella foenum-graecum, Eclipta prostrata. The Czech plant species include: Glycyrrhiza glabra, Arctium lappa, Althaea officinalis, Urtica dioica, Saponaria officinalis, Achillea millefolium.Those plant species are taxonomically varied, with differing habitat areas, biotope preferences and life forms. They are appropriate for hair care, solving problems regarding hair care and are ecologically sustainable.
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Determination of Mercury in Hair by Atomic Fluorescence Spectrometry
Šandlová, Petra ; Červený, Václav (advisor) ; Hraníček, Jakub (referee)
The functionality of PS Analytical's Millenium Merlin Satellite external module to the PSA Millenium Excalibur atomic fluorescence spectrometer has been demonstrated on real samples. Hair was selected as real samples. In the first part, several extraction procedures were tested to obtain the highest response. The best results were obtained by the extraction method with TMAH and HCl in FIA-UV-PVG- AFS mode. In the next part, an attempt was made to optimize the conditions for the separation of mercury speciation, namely Hg2+ and MetHg. The optimized parameters were: the percentage of organic component in the mobile phase, the pH of the mobile phase, the flow rate of the added mobile phase per column, and the flow rate of the added 0.050M HCl per column. After this stage, 3 more extraction procedures were tested: extraction using L-cysteine with HCl, extraction using PDTC and extraction using DEDTC. However, none of the extraction procedures was better than the extraction method with TMAH and HCl. Despite the optimization of the method, the speciation of Hg in the hair samples failed because the chromatograms obtained did not match (even in retention times) those obtained for the mixture of standards with the mobile phase extraction reagents. Subsequently, the conditions for the determination of total...
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Generování vlasů interpolací
Šik, Martin ; Křivánek, Jaroslav (advisor) ; Kolomazník, Jan (referee)
This thesis describes a procedural hair generator that is able to generate hair from just a few hairs, called hair guides, which are directly modeled by a 3d artist. The procedural hair generator is a part of Stubble project -- a tool for hair modeling in Autodesk Maya. The procedural hair generator can generate hair during rendering, thus avoiding storage of hair geometry in a scene file, which makes the rendering process very efficient. Furthermore, hair can be generated interactively and displayed by OpenGL during modeling in Maya. Generated hair geometry is mainly defined by interpolation from the mentioned hair guides; however it is also influenced by many hair properties. These properties can change hair geometry using noise functions, define hair color, width and more. To determine hair root positions on a given triangular mesh I use my own mesh sampling algorithm that generates random samples on a triangular mesh according to a density defined by a 2-dimensional texture. My sampling algorithm uses an innovative way of sampling from a discrete probability distribution, which can be used in other applications than mesh sampling.
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Realistic hair rendering in Autodesk Maya
Svoboda, Tomáš ; Křivánek, Jaroslav (advisor) ; Vorba, Jiří (referee)
This thesis describes a real-time hair rendering in 3D animation and modeling software Autodesk Maya. The renderer is part of the Stubble project a - Maya plug-in for hair modeling. The presented renderer provides a high-quality interactive preview that allows fast hair modeling without the need for rendering in slow off-line renderers. The goal of this work is to create a renderer that can generate images in real-time that are as close as possible to the output of the 3Delight renderer - a plug-in for Maya that is based on RenderMan standards.
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Human fur patterns and their evolution
Fischer, Jan ; Tureček, Petr (advisor) ; Hora, Martin (referee)
Human fur, although absent on the first sight, is one of human unique features. But the question is, what influences shaped it into its current state. First part ergo the loss of dense fur coat stands on two main hypothesis. The first one being increasing effectivity of sweating for active diurnal lifestyle and the second one being parasite avoidance. There are other hypothesis, although not as reputable. These are aquatic ape hypothesis and importance of fire use hypothesis. The second part are the remaining parts of human fur patterns, some of which even expanded, scalp hair, beards, eyebrows, pubic and axillary hair. Most of these are explained thru hypothesis regarding the importance of communication in expanding human societies but there are also some talking about typical mammalian hair function - environment protection. Scalp hair are mostly explained as health, beauty and individuality signal but it also probably had protective function. Beards as extremely sexually specific trade helped in competition between men although in more of a demonstrative way. They also played role in sexual selection. Eyebrows are irreplaceable in face recognition, emotion expression and they also protect an eye from sweat. Axillary hair preserves armpits and hosts an axillary organ useful in chemical communication....
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Generování vlasů interpolací
Šik, Martin
This thesis describes a procedural hair generator that is able to generate hair from just a few hairs, called hair guides, which are directly modeled by a 3d artist. The procedural hair generator is a part of Stubble project -- a tool for hair modeling in Autodesk Maya. The procedural hair generator can generate hair during rendering, thus avoiding storage of hair geometry in a scene file, which makes the rendering process very efficient. Furthermore, hair can be generated interactively and displayed by OpenGL during modeling in Maya. Generated hair geometry is mainly defined by interpolation from the mentioned hair guides; however it is also influenced by many hair properties. These properties can change hair geometry using noise functions, define hair color, width and more. To determine hair root positions on a given triangular mesh I use my own mesh sampling algorithm that generates random samples on a triangular mesh according to a density defined by a 2-dimensional texture. My sampling algorithm uses an innovative way of sampling from a discrete probability distribution, which can be used in other applications than mesh sampling.
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Hair as a bioindicator of contamination of risk metals
Zmijová, Marie ; Řezáčová, Veronika (referee) ; Zlámalová Gargošová, Helena (advisor)
The use of hair as a bioindicator of environmental contamination by risk elements is becoming more and more common. This bachelor thesis deals with the use of this matrix for analysis using the voltammetric method. It focuses on the optimization of the method for determining the concentration of cadmium, copper, lead and zinc in real hair samples and monitors the effects on the incorporation of these elements into the hair fiber. The presence of zinc and copper was confirmed in all samples analyzed. Cadmium could only be quantified in one sample. The effect of gender and age on the concentration of elements has not been demonstrated. Concentration of lead has been linked to smoking, with higher concentrations found in smoker’s hair than in non-smoker’s.
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