Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 46 for “"Toxic substances"”.
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Development of a test system for screening toxic substances: a comparison using organic substances
… was to develop a test system for screening toxic substances by predicting their aquatic ecosystem effects. The system studied was a static, one liter microcosm with a diverse species assemblage. Teh microcosm was composed of biotic inoculum, chemically defined medium and sediment. The biotic …
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The development and harmonisation of risk assessment procedures to evaluate the environmental impact of toxic substances
The environmental risk assessment of substances is introduced and the various controls used to protect the environment are outlined. The European notification system and the risk assessments required as part of the system are detailed. Through an examination of the existing European Union System …
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Uncertainty in synthetic biology for release and possibilities for regulation under the Toxic Substances Control Act
… are regulated by the EPA under the Toxic Substances Control Act (TSCA), which was not written to be adaptive. EPA regulators appear to be using TSCA adaptively even though it was not written this way. An examination of characteristics of planned adaptation using the EPA program for …
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ΠΟΙΝΙΚΗ ΑΝΤΙΜΕΤΩΠΙΣΗ ΤΗΣ ΚΟΙΝΩΣ ΕΠΙΚΙΝΔΥΝΗΣ ΧΡΗΣΗΣ ΤΟΞΙΚΩΝ ΟΥΣΙΩΝ (ΚΑΤΑ ΤΟ ΕΛΛΗΝΙΚΟ ΚΑΙ ΙΡΑΚΙΝΟ ΔΙΚΑΙΟ)
USAGE OF TOXIC SUBSTANCES IN MODERN CHEMICAL INDUSTRY QUITE OFTEN CONSTITUTES COMMONLY DANGEROUS ACT FOR HUMAN LIFE AND BODILY INTEGRITY. IN PARTICULAR, IN THIS FIELD OF CHEMICAL INDUSTRY DISASTROUS DANGER MAY RESULT FOR AN INDEFINITENUMBER OF PERSONS FROM THE USAGE OF CHEMICAL SUBSTANCES, MORE …
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The Role of Flagellates in Coke-Plant Activated Sludge.
… is used by the coal-coking industry to treat toxic substances from the wastewater generated by the coking process. High levels of ammonia, phenol, cyanide, and thiocyanate are removed from the wastewater by the activity of a mixed microbial community. Though the microbes efficiently remove the …
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DNA based biosensors for environmental and medical applications
… realized was applied to the rapid screening of toxic substances. The biosensor was constructed immobilizing a double helix DNA (Calf Thymus DNA) onto screen-printed electrodes. Subsequently, the biosensor was used for the determination of the toxicity of different kinds of common surfactants. …
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The development of appropriate methods for drug analysis at the Forensic Chemistry Laboratory, Cape Town
… positive for the presence of drugs and other toxic substances. Because of resource constraints, pathologists submit samples at their discretion and not on a routine basis. In this study, forensic and chemical aspects were combined and used as the motivation for the development of an improved …
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ANALYSIS OF PROTEASE ACTIVITY USING MEMBRANE- COATED BIOMIMETIC MICROSPHERES
… failure, and death. BoNTs are the most acutely toxic substances on the planet, so detection at physiologically relevant concentrations is difficult. Because current treatments for botulism cannot reverse existing paralysis, rapid detection is key, and current diagnostic techniques are not …
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Applicazione del processo a fanghi aerobici granulari per il trattamento di reflui petrolchimici
… concentrations of organic matter, ammonium and toxic substances like cyanides and phenols (IGCC wastewater); the other PW, collected from the equalization tank of the refinery wastewater treatment plant, was a poorly biodegradable mixture of all the refinery discharges which contained, among the …
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Do actors or observers make better eyewitnesses?
… against product manufacturers (including toxic substances like asbestos), an understanding of the factors involved in memories of products is important. This study attempted to further the research on eyewitness memory in product identification by examining differences between witnesses …
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Evaluation of the potential environmental toxic effects of a nylon fibers additive
New chemical substances being considered for use today are required by law to be evaluated for potential toxic effects upon disposal to the environment. A thorough evaluation, however, is complex, time-consuming, expensive, and impossible to perform on each new substance. In this study the …
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Effects of light and temperature on the formation of sexual structures in the family Saprolegniaceae
… was shown that light caused production of toxic substances in the medium which caused inhibition of growth and sporulation. The blue peroxychromic test for hydrogen peroxide in the medium was negative but apparent catalase activity was demonstrated. Using a simple medium consisting of …
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A study of succinic dehydrogenase, indole acetic acid oxidase, nitrate reductase and cytochrome c reductase in Hygrophorus Conicus
… was found to be stimulated by nitrate. Two substances were tested as electron acceptors in the measurement of succinic dehydrogenase activity. Of the two substances tried, phenazine methosulfate and brilliant cresyl blue, the former was found to be the best. Nicotinamide adenine dinucleotide …
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Analysis of multispecies microcosm experiments
Traditionally, single species toxicity tests have been the primary tool for assessment of hazard of toxic substances in aquatic ecosystems. These tests are inadequate for accurately reflecting the impact of toxicants on the community structure inherent in ecosystems. Multispecies microcosm …
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PCR-DDGE Comparison of Fecal Bacteria From Captive and Wild Populations of the Endangered San Esteban Island Chuckwalla (Sauromalus varius)
… varius, which has a native diet that consists of toxic substances and scarcely available food.
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Estudio de prefactibilidad para la instalación de un centro de hemodiálisis
… treatment that artificially removes harmful or toxic substances from the blood using a hemodialysis machine. For this, patients have previously placed a fistula or catheter through which they are connected to the machine. This treatment is performed three times a week in patients in stage 5 …
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Selection criteria and psychological adaptations to the ongoing dialysis and renal transplant programme
… programme; (3) due to the possible absence of toxic substances after transplantation, the transplant sample showed a higher level of intellectual functioning. Other possible explanations for the findings were provided.
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Integrated electronic waste management in Mexico : law, technology and public policy
… but because of the hazardous materials and toxic metals, including lead, nickel, cadmium, mercury and chromium to mention some of the most important health wise and the gold, copper, aluminum, nickel, silver and palladium they contain. These contents also offer incentives for their …
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Unique applications of cultured neuronal networks in pharmacology, toxicology, and basic neuroscience
… and drug development, biosensors and neurotoxicology, and the study of burst and synaptic mechanisms. Chapter 1 details the testing of seven novel AChE inhibitors, demonstrating that neuronal networks rapidly detect small molecular differences in closely related compounds, and reveal …
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A geographic information system analysis of submarine groundwater discharge on the eastern shore of Virginia
… can be contaminated with nutrients and toxic substances. Although discharge has been measured directly on a local level, a convenient method for determining the spatial distribution of SGWD on a large scale has not yet been devised. Although current watershed mass balance approaches have …
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