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 1401 for “"acidic"”.
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Rates of acidic hydrolysis of triptych boroxazolidines
Upon looking at the results of calculation of the rate constants given in Table 2, there are revealed some general trends as to the influence of the substituent groups on the values of the rate constants. If the rate constants of the reaction are considered at a fixed temperature, the rates of …
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A Lewis Acidic Stroll Through the p-Block
… Fluorosulfoxonium cations containing a Lewis acidic sulfur(VI) center were prepared from sulfoxides in an analogous fashion to previously reported fluorophosphonium cations. These cations were shown to enact Lewis acid catalysis via a S-F σ*-orbital and are among the first sulfur-based Lewis …
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An Investigation into Cerium Oxidation Under Acidic Conditions
… suitable for these processes. Oxidation in acidic solutions would allow for savings on reagents as well as lower water use, increasing the financial viability and environmental profile of rare earth purification processes. This study probes the efficacy of four oxidants; hydrogen peroxide, …
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Factors Affecting the Acidic Constituents of the Tomato
Made available in DSpace on 2015-05-12T17:00:52Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0025189.PDF: 2477203 bytes, checksum: bb1742a06b083951036d3f7614d2152e (MD5) Previous issue date: 1957
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Characterisation of acidic/basic properties of alumina supports
Previous experience with the preparation and testing of Co/alumina catalysts for Fischer-Tropsch synthesis has revealed that, while commercial available aluminas result in materials of significantly different catalytic performance, no correlation between the physical properties of the aluminas and …
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Functional Characterization of the HIV-1 NEF Acidic Cluster
… of CD4 downregulation, rely in part upon Nef's acidic cluster which has been reported to affect Nef's redirection of cell surface MHC-I to the trans-Golgi network by binding to the cytosolic adapter phosphofurin acidic cluster sorting-1 (PACS-1) (19, 147). Because Nef is potentially significant …
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Proline-rich acidic protein 1 in Life and Death
The Proline-rich acidic protein (PRAP1) was initially identified as a gene that was differentially expressed in pregnant mouse uterus. The rat and human homologues were subsequently identified and found to be expressed abundantly in the gastrointestinal tract. This thesis describes the …
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The anodic dissolution of covellite in acidic, chloride solutions
… synthetically produced, covellite electrode in acidic, chloride solutions at ambient conditions to investigate the dissolution behaviour of the mineral over a surface potential range from the open circuit potential (OCP) to about 0.62 V (vs. SHE). The electrode was mounted in an apparatus, which …
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Purification of an acidic recombinant protein from transgenic tobacco
… to develop a process for the purification of the acidic model protein, recombinant β-glucuronidase (rGUS), from transgenic tobacco leaf tissue to high yield and purity. Polyelectrolyte precipitation with polyethyleneimine (PEI) was identified as an initial purification step for purifying acidic …
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Nitrophosphate as an alternative phosphate fertiliser for acidic sandy soils
… MAP(33) when used as pre-plant fertilisers in acidic sandy soils commonly found in commercial agriculture. To meet this aim, two greenhouse experiments were conducted at the research facilities of Omnia (Pty) Ltd in Sasolburg, South Africa in 2013. The biomass, residual soil nutrient status and …
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Two-stage acidic-alkaline pretreatment of Miscanthus for bioethanol production
… alteration and ethanol yield. A two-stage acidic-alkaline pretreatment was proposed to obtain most intact monosaccharides from cellulose and hemicellulose. Dilute sulfuric acid pretreatment was performed in the first stage mainly for hemicellulose removal while the second stage carried out …
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pH Stability of Calcium Hydroxide Preparations in a Simulated Acidic Environment
… However, its efficacy is challenged by the acidic pH of purulent exudates in infected root canals. This study aimed to evaluate the pH stability of three calcium hydroxide preparations—BC Temp (bioceramic-based), UltraCal XSTM, and mixed Ca(OH)₂ powder with saline—in simulated acidic and …
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A Bioelectrochemical Sensing System for Measuring Acidic Bioprocess Fermentation End Products
Monitoring is an important tool in the management of bioprocesses such as anaerobic digesters, wastewater treatment plants and bioelectrochemical systems. There are several important parameters which are considered for regular monitoring, including pH, temperature, conductivity, gas composition and …
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Crop response to irrigation with acidic and neutralized, saline mine water
… The aim of this study was to ascertain if acidic and neutralized, saline Goldfield mine water can be used successfully for crop irrigation, using the waters from the Witwatersrand Goldfields, as water quality references. The study also aimed to investigate the role played by crop tolerance …
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A Study of the Intermediate-Range Transport of Secondary Acidic Species
… was undertaken to study the transport of acidic species formed from the transformation of gaseous emissions over an intermediate-range (100-200 km) by: (1) Selection, design and calibration of an instrument to separate submicron atmospheric particles, (2) Field sampling and chemical …
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Studies on the biosynthesis and structure of the acidic brain protein.
Thesis: M.S., Massachusetts Institute of Technology, Department of Biology, 1972
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Design of active, stable, and earth-abundant acidic oxygen evolution catalysts
… alkaline pH. These same systems corrode under acidic conditions, which is a regime important for electrolyzers and photoelectrochemical devices as well as for fundamental mechanistic studies. In this thesis, we iteratively design an active, stable, and earth-abundant acidic oxygen evolution …
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