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Concrete with Bio-Based Aggregates
Vrzáň, Jakub
This article focuses primarily on concrete made from plant-based aggregates (rapeseed and hemp straw) coupled with a binder (lime-based and water glass). These materials may represent a way to ensure the sustainable production of building structures with high insulation properties. It is necessary to have thorough knowledge of the behaviour of such materials in order to improve their applicability in diverse construction projects around the world. The main finding of this paper is that a composite material composed of locally available secondary agricultural raw material and lime binder exhibits excellent thermal properties.
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Cosmetics preparations against acne
Měšťánková, Zuzana ; Skoumalová, Petra (referee) ; Němcová, Andrea (advisor)
Hemp is a plant containing a number of active substances that can be used in cosmetics and pharmacy. The subject of this bachelor thesis is the multiplication of active substances by mixing cannabis with herbs that have anti-inflammatory effects. The theoretical part contains a description of the determined antioxidants and cannabinoids. The experimental part focuses on measuring the content of these substances in extracts created from the dry parts of herbs and hemp variety Ferimon. The work is also focused on the preparation of a cream containing cannabis and herbal extracts, which are aimed at inhibiting the formation of acne. The antimicrobial effect of creams and extracts was investigated on bacteria Propionibacterium acnes and Micrococcus luteus. The analysis of the extracts shows that the largest amount of active substances contained a mixture of mountain arnica and hemp, which also showed a good antimicrobial effect against both types of bacteria. The creams showed a low inhibitory effect due to the low content of active substances.
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Use of technical hemp in acne preparations
Žáčková, Kristýna ; Kovalčík, Adriána (referee) ; Němcová, Andrea (advisor)
Hemp belongs among important plants with a long industrial tradition. However, its first use was originally for healing. In medicine, it is mainly applied thanks to the content of many biologically active substances, such as cannabinoids. This thesis is concerned with the use of hemp in acne preparations. The theory focuses mainly on the characterization of hemp and its active substances. The other chapters deals with cosmetic preparations and acne itself, and Propionibacterium acnes as well, which is involved. Within the experimental part, the extracts of two hemp varieties (Finola and Bialobrzeskie) were characterized in terms of antioxidant and cannabinoid presence. The cosmetic preparations with hemp extract content were prepared including a complete cleansing set for acne skin, concurrently commercial products of this sort were purchased. In cosmetic preparations and the extracts their inhibitory effect against Propionibacterium acnes was studied as well. Also Micrococcus luteus, Escherichia coli and Candida glabrata were tested. The results show that dried hemp flower extracts contain the greatest amount of active substances, so they have a higher antioxidant and antimicrobial effect. The presence of individual cannabinoids differed mainly depending on the variety. All hemp extracts had effect against gram-positive bacteria, in cosmetic preparations it was lower. Nevertheless hemp antibacterial effect has been proven.
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Using of cannabis extracts for the acne preparation of cosmetic products
Pelánová, Lenka ; Langová, Denisa (referee) ; Němcová, Andrea (advisor)
Hemp belongs among important plants with therapeutic effects thanks to its high content of substances. This bachelor thesis brings information about the use of hemp in acne preparations. The theoretical part of this thesis focuses on the characterization of hemp and its active substances. The next chapters deal with acne and Propionibacterium acnes, which is involved in the course. For the experimental part, the extracts of two hemp varieties (Ferimon and Carmagnola) were characterized in terms of antioxidant and cannabinoid presence. The cosmetic preparations with hemp extract content were prepared and commercial products were purchased too. In both the extracts and the cosmetic preparations, their inhibitory effect against Propionibacterium acnes was observed. Micrococcus luteus, Candida glabrata and Escherichia coli were also tested. The results show that dried hemp flower extracts contain the largest amount of active substances. All hemp extracts had effect against gram-positive bacteria, in cosmetic preparations it was minimal effect or no effect.
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Complex processing of technical hemp and application of isolated fractions
Kohútová, Darina ; Němcová, Andrea (referee) ; Márová, Ivana (advisor)
Hemp is a plant containing many active substances and it is widely used in industry. The most common applications are the food, pharmaceutical, textile and cosmetics industries. This diploma thesis dealt with the characterization of hemp fractions, which are created during hemp processing and their potential applications. The theoretical part was focused on the description of the plant, its chemical composition and the research of the active substances in hemp. Also, its industrial use, the technique of hemp processing and the current applications of individual fractions were summarized. In the experimental part, hemp fractions were analysed in terms of nutrient content. Hemp extracts were prepared using three solvents - hexane, 70% ethanol and distilled water, which were compared based on the extraction yield of polyphenols, flavonoids, antioxidants, chlorophylls and cannabinoids. Antimicrobial effects were analysed in hexane and ethanol extracts. By-products of hemp processing were used in some screening application in biotechnology, cosmetics and nutrition. The results show that the extract with 70% ethanol had the highest content of active substances. From the hemp fractions, hemp trichomes and Fedora flowers had the highest content of active substances. Cannabis by-products have the potential to become valuable substrates for yeast cultivation. Face scrub containing hemp flour as an abrasive component had favourable results and was acceptable to consumers, as was the prepared hemp flour raw bar, which was evaluated to be comparable to commercially available hemp protein raw bars.
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Food and cosmetic use of technical hemp
Puškárová, Radka ; Skoumalová, Petra (referee) ; Němcová, Andrea (advisor)
The thesis occupies with the use of hemp in cosmetics and in food processing. In the theoretical part hemp was characterized by the content of active substances. In the experimental part the thesis is concerned with characterization of two different hemp varieties Carmagnola and Ferimon in terms of presence of active substances. The next part focuses on preparation of cosmetic with hemp content. In cosmetic preparations and in the extracts the inhibitory effect against Propionibacterium acnes, Micrococcus luteus, Escherichia coli and Candida glabrata was tested. The content of fatty acids and vitamin E was determined in hemp seed. The results show that dried hemp flower extract contains the largest amount of active substances and has the greatest inhibitory effect against all tested bacteria except Candida there was no effect. Cosmetic preparations did not show almost any inhibitory effect because of low concentration of active substances. The hemp seed contained high amount of PUFA and essential fatty acids. Vitamin E was found out in all of three hemp oils.
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Use of hemp and its products in cosmetics and pharmacy
Žáčková, Kristýna ; Skoumalová, Petra (referee) ; Němcová, Andrea (advisor)
Hemp is a versatile usable plant which can be found in almost all branches of industry, but also in medicine. The subject of this thesis is the determination of selected active compounds of technical hemp and its products and their possible applications in cosmetics and pharmacy. In the theoretical part is worked out the summary of active compounds including their effects in cosmetics and within medical use. In the experimental part were determined certain metabolites of hemp products, while as samples were used hemp flower, leaf, seed, flour, protein and two different hemp oils. There were also prepared creams with the addition of hemp oil in which the effects on the skin were assessed. In the analyzed samples was according to the character of the material determined the content of antioxidants, saccharides, proteins, lipids including the profile of fatty acids, vitamins and chlorophylls. It was proved that hemp flower is a better antioxidant than the leaf and contains higher amounts of all of the determined active compounds with this effect. Flour and protein which are made from the seeds have different percentages of individual studied compounds, because there is a different process for their production. The highest amount of saccharides is in the flour, hemp protein preparative consists of a 50 % of protein and in the seed was the highest lipid content. In the prepared hemp creams the moisturizing effects and the ability to prevent transepidermal water loss were observed.
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Detached Family Residence
Mikuš, Martin ; Vávra, Petr (referee) ; Vajkay, František (advisor)
The subject of this work is the design of a detached family house in area Nove Domky near Jihlava in which natural construction materials were used. Instead of concrete or bricks, this building is designed with materials such as straw, rock, timber, clay, hemp or sheep's wool. Furthermore, the work deals with methods of plumbing, electrical installations and heating. The possible utilization of natural energy resources or ecological processing of waste were also taken into account. The conclusion contains the financial comparison with a building where traditional and industrially produced materials are used.
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Study of behavior of thermal insulation materials on natural base
Kostlánová, Jana ; Balíková, Jitka (referee) ; Zach, Jiří (advisor)
The aim of the thesis is focused on a research of behavior of thermal and acoustic insulating materials on natural base with major importance on fibrous insulating materials. Vital part of the thesis is aimed on monitoring of environmental aspects interrelated with retrieving of raw materials and insulating materials manufacturing. Other types of fibrous insulating materials employed in a civil engineering are presented in the text. The main objective of the thesis is an evaluation of an influence of input fibers quality to the final attributes of insulating materials. The fundamental element of material quality evaluation represents physical and mechanical attributes of examined subjects.
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Active components of technical cannabis and their application in cosmetics
Kubáčková, Eliška ; Bokrová, Jitka (referee) ; Němcová, Andrea (advisor)
Hemp is unique plant with many therapeutic effects thanks to its large content of substances. This bachelor thesis brings information about characterization of main biological active substances in cannabis sativa, which are described in theoretical part of this thesis and determined in experimental part of this thesis. As a main active substance were determined antioxidants and cannabinoids for which the liquid chromatography method was optimized. This bachelor thesis also describes the antimicrobial effect of active cannabis substances for which it is used in the cosmetic industry. This antimicrobial activity has been studied in terms of the effect against dandruff, which is primarily caused by the high incidence of Malassezia yeasts on the skin of human hair. For the experimental part, the extracts of the technical hemp and more specific varieties of Bialobrzeskie and Finola were tested, which were further used for the preparation of the anti-dandruff shampoo. By analyzing the active substances in hemp extracts, the uniform result was obtained - the highest content of antioxidants and cannabinoids was reached by preparing of extract from dried hemp flowers. In the last part of the thesis, the antimicrobial effect of hemp extracts and prepared hemp shampoos was determined on selected strains of microorganisms and it was observed antimicrobial activity in extracts and shampoos againts Malassezia furfur yeast.
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