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 9 of 9 for “"PVC Pipes"”.
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The effect of viscoelastic deformation in pipe cracks on leakage response to variations in pressure
… Polyethylene (HDPE) and Polyvinylchloride (PVC) pipes are investigated. HDPE and PVC are polymeric materials and therefore exhibit a viscoelastic response to applied stress and applied strain. Viscoelastic responses include creep, relaxation, hysteresis and time dependency. When these pipes …
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Comparison of Biological Aerated Filter (BAF) performance using two granular sunken media at low organic and hydraulic loadings
… bench scale, upflow BAFs were constructed using PVC pipes with an internal diameter of 0.11 m. The system was operated at the Peppers Ferry Wastewater Treatment facility for two months and was fed with effluent from the primary clarifier. Grab samples of influent and effluent from the BAFs were …
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Morphology, Mineralogy, and Hydrology of Soils in the Triassic Culpeper Basin of Maryland
… was monitored in both open boreholes and slotted PVC pipes at staggered depths. Bulk samples of each horizon were collected for mineralogical and chemical analyses. Results indicate that hematite is the only iron oxide in the underlying red shales and sandstones of this basin. The hematite in the …
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Effect Of Source Water Blending On Copper Release In Pipe Distribution System: Thermodynamic And Empirical Models
… made from unlined cast iron and galvanized steel pipes, and lined cement and PVC pipes taken from actual distribution systems. Totally seven different waters were studied, which consisted of three source waters: groundwater, surface, and simulated brackish water designated as G1, S1, and RO. With …
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SNP ANALYSIS FOR DROUGHT-RELATED CANDIDATE GENES IN A GERMPLASM COLLECTION AND A TILLING POPULATION OF ITALIAN RICE
… system (plastic cylindrical baskets coupled with PVC pipes) with an efficient imaging analysis (WinRHIZO image analysis software). The results of genome-wide association analyses performed on a first set of root phenotypic traits were very encouraging. All the detected significant associations …
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Nitrification Investigation And Modeling In The Chloraminated Drinking Water Distribution System
… pilot distribution systems (PDSs) that were made pipes taken from actual distribution systems. Unlined cast iron (UCI), galvanized steel (G), lined cast iron (LCI), and PVC pipes were used to build the PDSs. All finished waters were stabilized and chloraminated before entering the PDSs. This …
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Prenatal exposure to phthalates accelerates reproductive aging in multiple generations of female mice
… care products like perfume, building materials, PVC pipes, children’s toys, car seats, and medical bags and IV tubing. Because phthalates are non-covalently bound to products, they can leach out due to cleaning and heating. Therefore, due to the vast use of products containing phthalates and …
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Synthesis and kinetic processes in designed polymers
… from polyester shirts to polyvinyl chloride (PVC) pipes or even polytetrafluoroethane (Teflon) non-stick coatings. As the needs of our society grow and change, innovative solutions must be created to overcome the challenges that industry faces today. New polymers must be designed and …
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Development Of A Performance Analysis Framework For Water Pipeline Infrastructure Using Systems Understanding
The fundamental purpose of drinking water distribution systems is to provide safe drinking water at sufficient volumes and optimal pressure with the lowest lifecycle costs from the source (treatment plants, raw water source) to the customers (residences, industries). Most of the distribution …