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Aplikace ligninolytických hub na pevných substrátech pro degradace endokrinních disruptorů / Application of ligninolytic fungi on solid substrates for degradation of endocrine disruptersSlavíková - Amemori, Anna January 2012 (has links)
Today a lot of attention is focused on compounds called endocrine disrupters (EDs) among substances released to environment by humans. They are a group of substances which can disturb function of hormonal system of organisms including humans. Their poor removal at wastewater treatment plants (WwTP) were shown at various studies, thus they can reach the environment in water. A prospective way for the degradation of EDs at WwTP can be their removal by ligninolytic fungi. They are able to degrade lots of lignin-like aromatic substances because of their highly nonspecific enzymes. In this work growth and enzyme production capability of four ligninolytic fungal strains were monitored on three solid substrates (straw pellets, poplar sawdust mixed with straw pellets, oak sawdust with straw pellets), which may be suitable substrates for fungal growth in bioreactors for wastewater treatment. Ability of these enzymes to degrade EDs were tested in in-vitro degradation experiment. Trametes versicolor was found as best degrading strain with 20 μg/ml of bisphenol A, 17 α- ethynylestradiol and nonylphenol degraded below a quantification limit within 24 hours. Fungal strains degraded EDs well on all of the three substrates but wood sawdust seemed to be a better substrate for fungal growth because straw pellets...
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Molecularly imprinted polymers for detection of volatile organics associated with fuel combustionNgwanya, Olwethu January 2018 (has links)
Magister Scientiae - MSc (Chemistry) / Pollutants such as polycyclic aromatic hydrocarbons (PAHs) are known for their toxic effects
which may lead to the cause of degenerative diseases in both humans and animals. PAHs are
widespread in the environment, and may be found in water, food, automotive industry and
petrochemical industries to name but a few sources. Literature reports have highlighted industrial
workplace exposure to PAHs as a leading cause for development of cancer in workers.
Particularly, workers in the petrochemical industry are adversely affected and the incidence of
skin and lung cancer in this population group is high.
The United States of America in its guidelines developed by environmental protection agency
(EPA) has identified 18 PAHs as priority pollutants. Among these are anthracene,
benzo[a]pyrene and pyrene which have been selected as the focal point of this study due to their
significance in the petrochemical industry.
Due to the carcinogenic and mutagenic properties reported in literature for certain PAHs, there
have been monitoring procedures taken in most countries around the world. The commonly used
analytical methods for the detection of PAHs from industrial samples are high performance
liquid chromatography (HPLC) coupled to fluorescence detection, membrane filtration,
ozonation and reverse osmosis. Analysis of PAHs from the petrochemical industry is typically
performed by HPLC method as well as sono-degredation in the presence of oxygen and
hydrogen peroxide.
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The mechanisms of BPA exposure and in the developing mammary glandHindman, Andrea R. January 2017 (has links)
No description available.
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