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 34 for “"Biological monitoring"”.
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The effectiveness of using volunteers for biological monitoring of streams
… have led to a larger interest in volunteer biomonitoring programs. Government agencies are currently using volunteer data for official purposes with increasing frequency, but questions have been raised about the validity of the data collected by volunteers who have only limited training and …
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The development of continuous automatic biological monitoring systems for water quality control
… environment. Viable systems for continuously monitoring water quality are, therefore, of critical importance for the future management and use of our watersheds. The value of regional monitoring programs using physical and chemical measurements is already well established. The major difficulty …
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The importance of bluegill feeding behavior within an automated biological monitoring system for industrial wastes
Cairns et al. (1973) described a biological monitoring system designed to detect sublethal levels of industrial effluents. Measurements of fish (Lepomis macrochirus, Rafinesque) activity, as well as respiration, were employed as indicators of toxicity. Prior to this study, fish used within the …
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Biological Monitoring of Oxygen and Nitric Oxide: The Development and Characterisation of Real-Time Microelectrochemical Sensors.
… Chapter 1 introduces the background behind the monitoring of NO and O2 in the brain, the biosynthesis of NO in the brain, the biosynthesis of NO through the N-methyl-D-aspartate receptor (NMDA) and the potential role of NO in neurovascular coupling. Chapter 2 discusses the theory behind the …
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The development and assessment of an automated biological monitoring system using crayfish locomotor activity to detect toxic stress
In-plant biomonitors, controlled by dedicated microcomputers, may ultimately provide detection of developing toxicity and hazardous spills in industrial effluents rapidly enough to prevent serious damage to receiving waters. A computer automated system was developed to continuously monitor …
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Negative phototaxis of mosquito larvae as a potential tool in the rapid biological monitoring of aquatic wastes (Diptera: Culicidae)
A little-known approach to toxicity testing--based on negative phototaxis of larval <u>Aedes aegypti</u>--was investigated as a contribution to the search for rapid methods applicable to the field of water pollution control. Zinc and copper were the toxicants tested. All tests were conducted with a …
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Development of defined media for motility and for growth of Spirillum volutans, with special reference to biological monitoring of pollutants and to obligate microaerophilism of bacteria
… industrial effluent for the purpose of in-plant biological monitoring. The other was a nutritional study of the organism with emphasis on its obligate microaerophilism. In the pollution monitoring project, flagellar uncoordination in S. volutans was studied as a bioindicator of toxicity. …
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Analytical methods to investigate occupational exposure to toxic elements and their species
… considered hazardous to health, the use of biological monitoring to monitor and control exposure to chemicals may help to reduce the risk of ill health. However, this is not always possible for all elemental workplace exposures. The work in this PhD thesis outlines the improvement of …
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The utilization of aquatic organisms for continuous and automatic monitoring of the toxicity of industrial waste effluents
… effluents. The requirements for this type of biological monitoring system and the suitability of various types of organismal responses for use in this manner were reviewed. This was followed by an evaluation of a method which used the computer-monitored ventilatory patterns of 12 bluegills …
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Novel approaches in macroinvertebrate biomonitoring
… popularity of benthic macroinvertebrate use for biological monitoring and assessment of lotic systems calls for new applications for regions with a lesser known fauna and an overall better understanding of how community measures are influenced by seasonal variability. Two separate studies are …
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Biotic Integrity in the Northwestern Great Plains and Mechanisms Regulating Stream Condition in South Dakota
… Natural Resources (SD DENR) began implementing biological monitoring on wadeable streams by developing an IBI for the Northern Glaciated Plains ecoregion in eastern SD (Krause et al. 2013). Prior to this survey the condition of the majority of SD’s streams was unknown. As the SD DENR expands …
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Evaluation of Neurotoxic Effect for the Low-Dose Mixed Organic Solvents Exposed Workers by using Posturography
… of each participant's occupational history and biological monitoring. The methods used included static posturography and self-administrated questionnaires of neuropsychiatric symptoms (Scandinavian Questionnaire 16). The exposed group showed a largersway area and length with the …
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A Comparison of Water Quality Analyses and the Index of Biotic Integrity in Bull Creek, Southwest Missouri
… on assessing these systems through ambient biological monitoring via fish communities. Missouri is currently joining other states in their efforts to determine aquatic health through an alternative methodology such as the Index of Biotic Integrity (IBI) in hopes to find an accurate and …
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The revised European bathing water directive: a case for interdisciplinarity?
… Framework (BWMF). This led to the creation of biological monitoring and communication<br/>methods that could deliver the requirements of the revised Directive. <br/><br/>This research showed that the revised Bathing Water Directive will require Competent Authorities to work with others and look …
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A study of compounds having antibacterial activity isolated from Rubus pinfaensis Levl. et Vant.
… has been subjected to chromatography, guided by biological monitoring. Four known triterpenoids, gallic acid, beta-sitosterol and three novel triterpene glycosides have been isolated and characterised. One new compound after enzymatic hydrolysis yielded a new aglycone, which has been named …
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Benthic Community Responses to Hypoxic Conditions in the Lower Rappahannock River, Virginia
… upwards from the deepwater Virginia Benthic Biological Monitoring Station LE3.4 located in the deep basin just inside the mouth of the Rappahannock River. Infaunal species diversity, richness, biomass, and density were measured along with the vertical depth distribution of organisms within …
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Monitoring and assessment of macroinvertebrate communities in support of river management in northern Vietnam
The thesis aimed to develop a water quality biological monitoring and assessment based on macro-invertebrates to analyse the status of watercourses and to select sustainable restoration measures in order to support river. The research was carried in the Du river basin in northern Vietnam. Spatial …
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Mathematical solutions to problems in radiological protection involving air sampling and biokinetic modelling
… with the personal air sampler (PAS) and by biological monitoring techniques: in the case of plutonium, there are problems with both methods. The statistical variation in activity collected when sampling radioactive aerosols with low number concentrations was investigated. By treating man as …
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"Aplicación de un sistema multimétrico para evaluar la calidad del agua superficial en la microcuenca El Coyote del Rio Estelí, Nicaragua"
… acuática (macroinvertebrados) se usó el método Biological Monitoring Working Party (BMWP/Col ) . La microcuenca tiene 144 afluentes con una forma oval - oblonga - alargada, y su curva hipsométrica refleja un estado de equilibrio relativo de juvenil a madurez. El uso del suelo es inadecuado y su …
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Sviluppo di tecniche di analisi ifenate per la quantificazione di biomarcatori di esposizione a tossici ambientali: gli acidi mercapturici
Human biomonitoring (HBM) is an ideal tool for evaluating toxicant exposure in health risk assessment. Chemical substances or their metabolites related to environmental pollutants can be detected as biomarkers of exposure using a wide variety of biological fluids. Individual exposure to aromatic …
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