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.
Results
Showing 1 to 20 of 37 for “"water extraction"”.
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Pore-water extraction from unsaturated tuff by compression methods, Nevada Test Site
Includes bibliographical references.
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Impacts of Water, Extraction Procedure and Origin on Anthocyanins and Volatile Compositions of Hibiscus Extracts and Freeze-Dried Hibiscus
… of our study was first to assess the impacts of water, extraction procedure and origin on the anthocyanins of hibiscus extracts and secondly, to examine the impacts of freeze-drying on the anthocyanins and the volatiles compositions of hibiscus extracts. For the first experiment, a 2x3 factorial …
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Novel Liquid extraction method for detecting Native-wood Formaldehyde
… between formaldehyde and wood hydroxyl groups/water can hinder the complete formaldehyde extraction. In order to have a complete formaldehyde extraction, a stronger nucleophile than hydroxyl and water groups is needed. In this study cross-linked poly (allylamine) (PAA) beads were synthesized …
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Pressurized Hot Water and DTPA-Sorbitol, Viable Alternatives for Soil Boron Extraction
Pressurized hot water and DTPA-Sorbitol are two relatively new soil boron (B) extraction methods with potential to replace the cumbersome hot water extraction. The objective of this research is to produce data in support of acceptance or rejection of these two alternative B extractions. The three …
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On-line screening of bioactive compounds and application of comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry for the analysis of birch bark
… using an environmental friendly pressurized hot water extraction technique. It provided good extraction efficiencies for phenolic compounds compared to those achieved with Soxhlet extraction. With pressurized hot water extraction the amount of extractable phenolic compounds approached for up to …
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The utilization of Dambos in Chipata: A case of Mwami border area
… in dambos are cultivation, livestock grazing, water extraction, sand mining, black soil quarrying and grass threshing. Cultivation is mainly done during the dry season although wet season cultivation on dambos is also possible. Livestock grazing and water extraction are also dry season …
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UAB "Šiaulių vandenys" veiklos efektyvumo vertinimas ir perspektyvų numatymas /
… analysis of other major Lithuanian cities water extraction and sewerage companies is done in order to compare some financial (efficiency, asset turnover, profitability) indicators between the companies. Great attention is paid to long term material asset technical condition, utilization and …
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Wood extractives in hemicellulose stabilized emulsions
… pulping (TMP), by pressurized hot-water extraction (PHWE) or by mild alkali pressurized hot-water extraction (BLN). The isolates were either used as such (Con), after spray-drying (Spdr) or after ethanol precipitation (EtOH). The content and composition of phenolic residues and …
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Competition For Above And Below Ground Resources Among Annual Species From The Plant To The Field: Quantification Analysis And Modeling
… the understanding of the role of weeds in water use and crop water productivity, ii) to test, through field experiments and an individual based model, the effects of size inequality and plant spatial arrangements on the competitive relationships among plants, the success of individuals, the …
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Critical Material Recovery from Salt-Lakes and Spent Batteries with Membranes and Solvents
The sustainable extraction and recovery of critical metals such as lithium, cobalt, and rare earth elements are essential for advancing renewable energy technologies, electric vehicles, and modern electronics. This thesis addresses the significant environmental, economic, and logistical challenges …
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Tree-Inspired Water Harvesting
… we were motivated to develop novel devices for water harvesting inspired by natural trees, and to understand their collection efficiency and working principles. We accomplished that with scale-model and large-scale fog harps, floating leaves, and synthetic trees. Fluids mechanics, physics, and …
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Development of root observation method by image analysis system
… managing soil effectively, studying nutrient and water extraction, and creating a soil quality index. Plant root research is limited by the large amount of time and labor required to wash the roots from the soil and measure the viable roots. A root measurement method based on image analysis was …
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Design guidelines and synthesis of a low dielectric constant inorganic composite for high performance microelectronic packaging
… Finally, this thesis presents an emulsion/water extraction synthesis method for preparing hollow ceramic microspheres suitable for use in the composite. A phenomenological model was developed to correlate the size and aspect ratio of the hollow microspheres to the important process …
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Application of Fourier-transform Infrared (FTIR) for Quality Control of Swiss Cheese
… wave numbers formed, were used to monitor water extracts of Swiss-type cheese during manufacture, in defective cheeses and in different grades of cheese. Soft independent modeling of class analogy (SIMCA) was used to develop different classifications with infrared spectra. This study has …
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Aerial photography and environmental impact analysis : the potential contribution of comparative interpretation of multi-temporal aerial photographs to Environmental Impact Analysis
… for recreation began in 1972 and in 1976 for water extraction. Pre-development photographs, 1938, 1960, 1968 and 1971, were stereoscopically compared and the observations were interpreted using a systems approach. From the analysis of the photographs and information on past landuse, the …
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Investigations of water and tracer movement in covered and uncovered unsaturated waste rock
… collected for physical characterization and pore water extraction. The internal structure of the waste rock pile was more important than the texture and topography under the free-dumped and ripped/leveled surface, while the surface condition was found to be the dominant control on spatial and …
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Enzymatic modification of the extractability of protein from soybeans (Glycine Max)
… of making soy residue protein available for extraction, were pH 4.6 and 38°C. Treating one gram of soy residue, 40 ml (32 mg Nitrogen) enzyme preparation, at the optimum pH and temperature for 20 hours caused the most efficient extraction of protein. There was an increase in the amount of …
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Liquid swine manure as a phosphorus source for corn-soybean rotation
… P), and two environmental tests (Iron-oxide and Water extraction). The second study used a strip-trial methodology using precision agriculture technologies and its objective was to compare three statistical methods (classical, geostatistic, and Markov random field model) to study soil-test P …
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Isotope Systematics of Gypsum and its Hydration Water
… isotope analysis of the structurally-bound water in gypsum can provide a direct measure of past hydrologic variability. This thesis presents the development of the water extraction and isotopic measurement procedures, the calculation of the gypsum-water isotope fractionation factors, and the …
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High Performance Disulfonated Poly(arylene Sulfone) Co- and Terpolymers For Proton Exchange Membranes For Fuel Cell And Transducer Applications: Synthesis, Characterization And Fabrication Of Ion Conducting Membranes
… PATS membranes exhibited moderate PTA molecule water extraction after acidification treatments performed at either room or boiling temperatures. The membranes containing HPA showed improved conductivity at high temperatures (120 °C) and low relative humidities when compared to the pure …
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