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 65 for “"FREE WATER"”.
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Evaporation from free water surfaces
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Civil and Sanitary Engineering, 1958.
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Spatio-Temporal Analysis of Flows Close to Free Water Surfaces
In order to examine the air-water gas exchange, a detailed knowledge is needed about the flow field within and beneath the water-side viscous boundary layer. Therefore a novel measurement technique is developed for the spatio-temporal analysis of flows close to free water surfaces. A fluid volume …
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Using Free Water Surface Constructed Wetland for the Mitigation of High PH Secondary Effluent From Municipal Wastewater Treatment Plant
Wastewater stabilization ponds (WSPs) are considered to be the most sustainable technology for small, rural and remote communities in North America. However, due to the configuration of WSPs and limited control over these systems, performance concerns during certain parts of the year may arise, as …
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The acute toxicity of molybdenum to the bluegill
… was determined as 1320 ppm molybdenum in ion-free water.
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Effectiveness of Wastewater Treatment for Selected Contaminants Using Constructed Wetlands in Mediterranean Climates
<p>Constructed wetlands for wastewater treatment (CWWT) are engineered wetland systems created to emulate the processes that occur in natural wetlands. This research focused on looking at the effectiveness of selected contaminant removal based on pilot-scale and full-scale case studies conducted in …
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ΔΙΗΛΕΚΤΡΙΚΗ ΜΕΛΕΤΗ ΤΗΣ ΚΑΤΑΣΤΑΣΗΣ ΤΟΥ ΝΕΡΟΥ ΣΕ ΥΔΑΤΙΚΑ ΔΙΑΛΥΜΑΤΑ ΚΑΙ ΥΔΑΤΩΜΕΝΑ ΣΤΕΡΕΑ ΔΕΙΓΜΑΤΑ ΜΟΝΟ-ΚΑΙ ΔΙ-ΣΑΚΧΑΡΙΤΩΝ
… THE DIM WAS TO GAIN INFORMATION ON THE STATE OF WATER, ON THE HYDRATION MECHANISM AND THE NATURE OF THE HYDRATION POSITIONS. A SYSTEMATIC STUDY OF THE L.T REGION (100- 160K) SHOWED THAT SUGAR SOLUTIONS CAN BE DIVIDED INTO TWO CATEGORIES. SOLUTIONS OF GLUCOSE, GALACTOSE AND MANNOSE HAVE SIMILAR …
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Advanced Methods for Diffusion MRI Data Analysis and their Application to the Healthy Ageing Brain
Diffusion of water molecules in biological tissues depends on several microstructural properties. Therefore, diffusion Magnetic Resonance Imaging (dMRI) is a useful tool to infer and study microstructural brain changes in the context of human development, ageing and neuropathology. In this thesis, …
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Studies on hydration water dynamics and microstructure of synthetic cement
… In a wet paste, the porosity links to the free water volume after hydration. Structural water which presents in the solid phase, constrained water absorbed on the surface of the pores and free water in the center of the pores have different dynamical behavior. Hence, it should be possible …
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The effect of vibratory loading on vertical model piles in clay
… soil consistency, dynamic force amplitude, and free water surrounding the pile were investigated. The effect of confining walls on such tests received special attention. Tests were also performed on two model pile groups. The possibility of representing a pile subjected to vibratory excitation …
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Motility and Chemotaxis of Erwinia Amylovora
… but become motile when placed in contact with free water at temperatures optimal for flagella synthesis.
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A model for the evolution of gas pressure and composition during sealed storage of metallic uranium fuel
… Corrosion in which oxygen is consumed, or water is consumed and hydrogen is produced, -- Uranium Hydriding in which hydrogen is consumed, and -- Radiolysis in which water is consumed and hydrogen and oxygen are produced. The model characterizes the evolution of gases inside the MCO for the …
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Development and Structural Performance Assessment of Low-Carbon Concrete Using Recycled Concrete Aggregates and Secondary Materials
… bulk specific gravity (BSG) and over 200% higher water absorption values relative to natural aggregate sources. The effect of RCA within experimental within mixtures was governed by the aggregate and mortar strength properties and relied significantly on the strength class of the resultant mixture …
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Hybrid organic-inorganic pervaporation membranes for desalination
… leading candidate technology for supplying fresh water in recent years. However, there is a strong motivation for improving the established membrane process and/or developing alternative membrane technologies to overcome the limitations of high energy cost and brine discharge problems of RO …
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Breakdown characteristic of palm oil and coconut oil under AC and DC voltage with different moisture rate
… insulation performance in the transformer, the free water content inherent in the oil must be at a low level. Therefore, breakdown voltage tests using direct current and alternating current with the addition of different water content were performed to identify the potential of palm oil and …
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Evaluation of storage conditions on DNA used for forensic STR analysis
… concentration and the effects of repeated freeze-thaw cycles. DNA quantity was assessed using real-time polymerase chain reaction and DNA quality was evaluated using STR genotyping. Overall, the Tris-EDTA (TE) buffer outperformed nuclease free water as a long-term storage buffer for DNA …
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Numerical Models for Scour and Liquefaction Around Object Under Currents and Waves
… numerical model for the sea bed response under free surface water waves is constructed. Free water surface is modeled by volume of fluid (VOF) method and water waves are generated by numerical wave-maker boundary condition. An iterative numerical scheme is proposed to solve the Biot …
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Predicting adsorption isotherms in natural water using polyparameter linear free energy relationships
Activated carbon is widely used in drinking water treatment to remove both natural organic matter (NOM) and trace organic contaminants. Adsorption isotherms for trace contaminants in the presence of NOM are needed to predict the performance of activated carbon for removing these compounds, but such …
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Effect of Admixtures, Chlorides, and Moisture on Dielectric Properties of Portland Cement Concrete in the Low Microwave Frequency Range
… study the effect of moisture, type of aggregate, water/cement ratio, curing period, admixture type (microsilica, superplasticizer, and shrinkage admixture), and chloride content on the dielectric properties of PCC. Measurements were conducted in the time domain and converted to the frequency …
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Single nephron structure and function, and renal effects of catecholamines in the dogfish, Scyliorhinus canicula
… relative clearance of osrnolytes and relative free water clearance were unchanged by adrenaline. 9. Anaesthesia significantly reduced urinary output. 10. Micropuncture techniques were used to determine single nephron glomerular filtration rates (SNGFR). Infusion of adrenaline increased mean …
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Radio Echo Studies of Glaciers
… These scattering centres nay be impurities, free water, or solid ice within less dense firn. A v.h. f. radar system has been designed specifically to produce continuous profiles of ice thickness when used either on the surface of a glacier, or in an aircraft flying over it. The frequency …
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