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 16 of 16 for “"diatomaceous earth"”.
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Smallholder food security in sub-Saharan Africa: the case for diatomaceous earth grain protectants
Researchers decided to explore whether diatomaceous earths (DEs) might meet the grain protection demands of rural households. These inert dusts are non-toxic to mammals but deadly to insects absorbing the wax from the insect’s cuticle which leads to water loss and death. Following laboratory …
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Synthesis of Acid Leached Diatomaceous Earth/ Amine-Functionalized Activated Carbon Composite and its Potential Application in Oily Wastewater Treatment
… of this project is to synthesize acid-leached diatomaceous earth (DE) and amine-functionalized activated carbon composite adsorbent for the treatment of oily wastewater. Acid leached diatomaceous earth was synthesized by leaching the raw diatomaceous step-wisely in a 120 mL volume of 2.2 M …
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Fabrication of Macadamia Nutshell Powder-AI/Fe Metal Oxide Modified Diatomaceous Earth Composite Beads for Fluoride and Pathogen Removal Groundwater
… nutshell powder-Al/Fe metal oxide Modified diatomaceous earth composite beads for fluoride and pathogen removal and to further evaluate their properties and efficiency of fluoride and pathogens removal. The optimum ratio for fabricating the beads was found to be 1:3 (1 MNS: 3 Modified DE) …
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Qualitative and Quantitative Evaluation of Volatile Compounds of Deep Frying Oil and French Fries: Static and Dynamic Headspace-Gas Chromatography-Mass Spectrometric Analysis
… the following order: non filtered treatment $>$ diatomaceous earth filter aid $>$ magnesium silicate filter aid. Total polymer content was correlated with overall French fries odor quality. Overall odor quality increased in the following order magnesium silicate French fries/frying oil $>$ …
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Microfiltration of Corn Starch Hydrolysate Using Ceramic Membranes
… for rotary vacuum precoat filtration, which uses diatomaceous earth as a filter aid, would be $1.8 million per year.
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Organochlorine Pesticide Residue in Fish Fillets From Lake Springfield, Missouri
… and passed through a Chem Elut cartridge (65% Diatomaceous Earth and 35% crystalline silica). The solution was collected after it has passed through the cartridge and an additional 50 mL of hexane was passed through the cartridge. The collected solution was then transferred to a round bottom …
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Studies on growth and filtration of the antagonistic biocontrol yeast Cryptococcus albidus
… of Saccharomyces cerevisiae (Baker's yeast) and diatomaceous earth (DAE) as filter aids were investigated as a means of further improving filterability.
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Lactose Polymerization to Polylactose: Furthering Our Understanding for Commercialization
… resins composed of Amberlite and Ambersep and diatomaceous earth reduced the hydroxymethylfurfural (HMF) content to a level that was lower than the maximum level determined by the Joint FAO/WHO Expert Committee on Food Additives HMF limit in polydextrose, while increasing the fiber content and …
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Bed Bug Management in Low-Income, Multi-Unit Housing: An Evaluation of Resident Education and Cost-Effective, Minimally Toxic Suppression Methods
… to afford conventional treatment. In this study, diatomaceous earth (D.E.), an inexpensive desiccant dust labeled for bed bug control, was evaluated for its efficacy in killing bed bugs, and determined to be successful. A proactive bed bug suppression program that included D.E. was implemented in …
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Feeding of Naupliar and Adult Carnivorous Cyclopoids (Crustacea : Copepoda)
… One-day old nauplii fed on bacteria mixed with diatomaceous earth and dissolved organics, but not on "Ceriodaphnia", "Bosmina", "Asplanchna", "Paramecium", "Selenastrum", nor free bacteria. The prey difference method worked well for detecting predation of forms larger than 150 ~, while the …
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Assessment of groundwater quality and community’s experiences in relation to water quantity and quality challenges in Lephalale Municipality, Waterberg District, Limpopo Province in South Africa
… 1.68 L of groundwater with 30 g of Al/Fe oxide Diatomaceous Earth (DE) which shows a great potential. The study recommends continuous groundwater quality monitoring in Lephalale Municipality. Due to lack of knowledge amongst the participants concerning water quality, there is a need for public …
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Experimental improvement of flyash as a growth medium for plants through addition of selected solid wastes
… consisting of phosphoric acidimpregnated diatomaceous earth, also obtained from SASOL's Secunda operation.
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Transient heterologous protein expression in green microalgae
… into a packed-bed matrix mediated by diatomaceous earth was investigated as an approach to be exploited for the expression of various heterologous proteins, using transient gene insertion rather than stable, nuclear gene integration (GMO). Microalgae is ideally suited for this as they …
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Development of a sulfate reducing packed bed bioreactor for use in a sustainable hydrogen production process
… contributed to improved bioreactor performance. Diatomaceous earth (DE) pellets, porous glass beads, polyurethane foam, and bone char were evaluated as potential carrier materials for SRB immobilization. The DE pellets immobilized the most biomass, were well suited for use at the industrial …
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Biologically-templated metal oxide and metal nanostructures for photovoltaic applications
… materials. As starting materials, we obtained diatomaceous earth, a natural source of biotemplated silica, and we also mineralized M13 bacteriophages with silica to produce porous nanonetworks, and Spirulina major, a spiral-shaped algae, to produce micro-coils. We successfully reduced all …