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Výzkum pro hospodaření s odpady v rámci ochrany životního prostředí a udržitelného rozvoje (prevence a minimalizace vzniku odpadů a jejich hodnocení): Sledování toků odpadů ve vazbě na nebezpečné vlastnosti
Výzkumný ústav vodohospodářský T.G. Masaryka, v.v.i., Praha ; Vejnar, Pavel
Nakládání s vybranými druhy nebezpečných odpadů od jejich vzniku u původce pro jejich konečné využití nebo odstranění. Bylo ověřeno nakládání s devíti vybranými čísly odpadů v ČR. Zdrojem dat byl Informační systém odpadového hospodářství (ISOH). Jedná se o hydroxid vápenatý, alkalické mořící roztoky, jiné motorové, převodové a mazací oleje, směsi betonu, cihel, tašek a keramických odpadů, odpady, na jejichž sběr a odstraňování jsou kladeny zvláštní požadavky s ohledem na prevenci infekce, kaly z fyzikálně chemického zpracování obsahující nebezpečné látky, prach ze spalin obsahující nebezpečné látky, zemina a kamení obsahující nebezpečné látky, izolační materiál s obsahem azbestu.
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Hodnocení stavu životního prostředí: Monitoring cizorodých látek v potravních řetězcích: Zajištění systému kontroly jakosti (správné laboratorní praxe). Monitoring vybraných cizorodých látek ve vybraných složkách
Česká zemědělská a potravinářská inspekce, Praha ; Český ekologický ústav, Praha ; Vysoká škola chemicko-technologická v Praze, Praha ; Suchánek, Miloslav ; Volka, Karel
V první zprávě je navržen systém auditu a validace správné laboratorní praxe v síti monitorovacích laboratoří. Je připraven návrh na vznik Národní referenční laboratoře pro metody monitorování životního prostředí a pro systém správné laboratorní praxe. Druhá zpráva přináší výsledky monitorování kontaminace těžkými kovy (kadmium, olovo, rtuť, zinek, měď, nikl, arsen), polychlorovanými bifenyly, organochlorovými pesticidy a polyaromatickými uhlovodíky ve 22 vybraných lokalitách a jejich interpretaci.
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Analysis of the production process of the company Abydos s. r. o.
Sciranka, Peter ; Kislingerová, Eva (advisor) ; Kupec, Olga (referee)
The rapid evolution of a turbulent world economy in recent years has caused problems to a large number of enterprises, especially those that operate in cyclical sectors of the economy. The aim of this thesis is the financial and economic analysis of the company Abydos s. r. o., which operates in the engineering industry and its main business is supplying components for the automotive industry. Another objective is to analyze selected parts of the manufacturing process and design optimization and measures that would help the company improve the process and thus improve economic results of the company.
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Seasonal dynamics of selected blood parametres of selected flesh breeds of sheep bred in foothills conditions
ŽÁČKOVÁ, Klára
Sheep breeding is nowadays a developing branch of agriculture again. There is a lot of different breed and they react distinctly on the same conditions of the enviroment. Sheep of breeds charollais, suffolk, šumavská ovce and valaška bred in similar conditions were observed in spring and autumn of years 2007 and 2008. In these seasons were taking blood samples (from {$\pm$}7{--}24) ewes and lambs and were analyzed in hematology laboratory. There were determined haemoglobin level, haematocrit indicator, erytrocytes and leucocytes levels, glucose, cholesterol, triglycerides levels, urea and plasmatic proteins, activity of ALP and GMT enzymes, phosphor, calcium, magnesium, zinc and copper levels. The main objective of this project was determine seasonal changes in observed parametres. Next objectives were determine different changes in blood parametres in different breeds and different aimes of breeds. There were recognized that all the observed breeds don`t react the same way on similar conditions. There were not provably determined seasonal changes in observed parametres, but average Hb level was higher in autumn than in spring. Urea level was conversely higher in spring season than in autumn. The demostrable fact is, that the similar conditions induce different answers not only in different breeds but also in different aimes of breeds.
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The ecological aspect emanation of zinc and copper in the cattle
JURKOVÁ, Petra
The objective of my diploma thesis was to determine the ecological impact of zinc and copper on the dairy and beef cattle breeding in the South-West Bohemia region at the farms located in the Šumava Protected Landscape Area, at the elevation from 750 m to 1070 m. The research included 4 cattle breeding farms, Posobice and Nemilkov {--} dairy cattle, and Hartmanice, Keple {--} beef cattle. In my thesis, I first evaluate the importance of zinc and copper as important mineral matters and their overall influence of the cattle organism. Furthermore, I evaluate their manifestations when these matters are lacking or in surplus in the organism. The final part of the thesis comprises two areas of findings. The first part focuses on the total intake in feed and mineral additives, the level of their content in blood plasma and their quantity excreted by cattle in the individual dairy and beef cattle breeding farms specified above. The second part researches the release of zinc and copper to the environment.
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Optimalizace vnášení prášku při plazmovém stříkání wolframu a mědi
Matějíček, Jiří ; Mušálek, Radek
Coatings of tungsten, copper and their composites can be used in various thermal management applications. For plasma spraying, injection of the feedstock powder is critical to achieve proper melting in the plasma jet and to produce coatings of desired properties. In this study, powder injection parameters were optimized while varying the injection location and carrier gas flow. Behavior of the particles in the plasma jet was observed using in-flight particle diagnostics; deposition efficiency as well as several coating properties were measured. Based on the results, the optimal injection conditions were selected, and composites and graded layers produced.
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Vliv podávání prášku na mechanické vlastnosti plazmových nástřiků mědi a wolframu
Mušálek, Radek ; Matějíček, Jiří
Nuclear fusion is considered to be a promising energy source for the future. One of the biggest problems which has to be solved is the development of inner wall material of the fusion reactor. For the inner parts which will be exposed to high levels of heat and particle flux, a combination of tungsten layer on copper parts was proposed. Tungsten is refractory material resistant to high heat and particle flux, while copper can efficiently remove heat due to its high thermal conductivity. But high stress concentration on the materials interface can occur due to the thermal expansion coefficient (CTE) mismatch of both materials when exposed to high temperatures. Therefore plasma spraying is promising technology for this application. One of the critical plasma spraying parameters is the carrier gas flow which has to be optimized to ensure proper particle trajectory along the centerline of the plasma flame. Obtained results are currently being used for the development of FGM coatings.
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Voltametrie vysoce dispergovaných měděných prášků na rtuťových elektrodách
Heyrovský, Michael ; Korshunov, A. ; Bakardjieva, Snejana
Average size of majority of the tested powder particles was between 100 and 300 nm, which are kept in relatively stable dispersed form in electrolytic solutions by Brownian motion. Electrolytic activity of the particles was due to 10-30 nm thick surface layer of copper oxides, the outer side consisting of CuO, the inner side of Cu.sub.2./sub.O. The current due to electroreduction of surface copper oxides followed particulate mechanism: on fortuitous contact of particle with electrode surface an immediate transfer of a number of electrons takes place, determined by time of the contact and by several dynamic and steric factors. No diffusion flux of particles to electrode surface is established. The potential of particulate electroreduction is determined by electronic structure of the actual form of the solid state particle.
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Behavior of Various Separators in Spouted Bed Electrowinning of Cooper
Jiřičný, Vladimír
The electrowinning cell of laboratory scale has been tested with various separators. Lifetime and conditions of dendrite formation have been determined for various separators in extended experimental study where effect of operation conditions as current density, temperature, electrolyte composition and impurities have been investigated. The copper deposition was used as a model system.
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