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 “"SRB"”.
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Effects of Sulfide and pH on Microbial Sulfate Reducing Efficiency
… bioreactors using sulfate reducing bacteria (SRB) have been increasingly utilized in acid mine drainage (AMD) affected sites. When designed appropriately, these systems are sustainable, cost effective, and have relatively low labor requirements. This study examined the effects of sulfide …
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Toward an Understanding of Interindividual Variation in Hydrogenotrophic Microbes in the Human Colon
Chapter 4 describes the diversity of colonic SRB and methanogens in native African (NA), African American (AA) and Caucasian American (CA) healthy subjects. In this study, stool samples from NA, who were consuming a diet low in animal protein, versus AA and CA, with both cohorts consuming a typical …
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Evaluation of silver nanoparticle-fortified biochar as a reactive filter media for irrigation water disinfection
… media, silver-amended soil reef biochar (Ag/SRB). Biochar is produced from pyrolyzed organic waste and has been used in water treatment applications for chemical removal and transformation. Through addition of silver, Ag/SRB can significantly reduce microbial concentrations in water, unlike …
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Sulfate -Reducing Bacteria and Their Contribution to Intestinal Epithelial Disorders
… produced by commensal sulfate-reducing bacteria (SRB), may represent such an environmental insult, as this compound is highly toxic for aerobic organisms. Little is known about the intestinal ecology of SRB or the contributions of exogenous sulfate from diet or drinking water to H2S production. We …
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Community, structure, activity and ecophysiology of sulfate-reducing bacteria in deep tidal flat sediments
… In this thesis sulfate-reducing bacteria (SRB) were shown to be highly abundant and metabolically active in down to 5 meters depth of a tidal sand flat (German Wadden Sea). The majority of the isolated and quantified SRB were members of two widely distributed phylogenetic groups within the …
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Role of cavitation, surfactants, and their synergism in transdermal sonophoresis
… commonly used fluorescent dye sulforhodamine B (SRB). SRB is often considered to be a purely hydrophilic molecule, having no impact on bulk or interfacial properties of aqueous solutions. However, it was demonstrated that SRB is in fact an amphiphile, with the ability to adsorb at an air/water …
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Using a Dual-Factor Model to Understand the Mental Health of Students with School Refusal Behavior
<p>Students with school refusal behavior (SRB) often present complex cases that include variations of internalizing (anxiety and depression) and externalizing (opposition and defiance) mental health struggles. Historically, incongruent classification methods and terminology have hindered the …
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Linking microbial community dynamics and performance of a biological sulphate reducing system using a mixed volatile fatty acid stream as electron donor
… mediated by sulphate reducing bacteria (SRB), have attracted attention as a sulphate remediation strategy as they offer a cheap alternative to other sulphate removal technologies such as chemical approaches. In addition, the concomitant generation of alkalinity and soluble sulphide assist …
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Microbial Ecology of Acanthamoeba polyphaga and Sulfate-Reducing Bacteria in Premise Plumbing
… against trophozoites. Sulfate-reducing bacteria (SRB) are suspected to be causative agents in copper pitting corrosion. SRB have been found in tubercles covering pits in many homes experiencing pinhole leaks, but the mechanisms of the survival of these organisms in potable water systems are poorly …
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Theoretical Analysis and Design for the Series-Resonator Buck Converter
… current density. A Series-Resonator Buck (SRB) converter is realized by adding a resonant tank in series with the series capacitor Cs. All switches turn on at zero-voltage (ZVOn), and the low-side switches turn off at zero-current (ZCOff). The design of the SRB converter includes …
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SCHOOLING AT THE INTERSECTION OF REFUGEE IDENTITY AND (DIS)ABILITY: IMPLICATIONS FROM NORTH KOREAN STUDENTS WITH REFUGEE BACKGROUNDS
… North Korean students with refugee backgrounds (SRB) who relocated to South Korea. I utilized participant observations, document analysis, and interviews with students, teachers, and school leaders at an alternative school in South Korea, exclusively serving North Korean SRB.</p> <p>The findings …
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Bioremediation of Effluent Water in a Coal Ash Disposal Area: Optimizing Microbial Sulfate Reduction
… to investigate sulfate reducing bacteria (SRB) mechanisms within flask wetland microcosms, simulating conditions comparable to the final pond at the disposal area. The effectiveness of acetic acid, lactic acid, mushroom compost, and cow manure were analyzed through a series of laboratory …
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An examination of novel archaeal stress response genes
… from four distinct families, which were named srb, src, srd and sre. The srb family represents an essentially undescribed group of genes (COGI433), that occurs primarily amongst members of the Euryarchaeota. Due to the sporadic distribution of srb genes amongst extant life, the srb genes are …
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Réttur barna til að hafa áhrif
… Sameinuðu þjóðanna um réttindi barnsins (SRB) hafa öll börn sem myndað geta eigin skoðanir rétt til að tjá sig frjálslega í öllum málum sem þau varða og hafa áhrif í samræmi við aldur og þroska. Þá er í 1. mgr. 43. gr. barnalaga nr. 76/2003, tekið fram að veita skuli barni sem náð hefur …
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The effect of carbon addition, pH and Fe concentration of microbial sulfate reduction and the subsequent precipitation of Fe and Mn from acid mine drainage in wetland mesocosms
… improvement and sulfate-reducing bacterial (SRB) populations revealed that the wetland was effectively treating the AMD. Iron and Mn both met compliance standards set by the EPA requiring an instream Fe concentration of 3 mg/L and an instream Mn concentration of 2 mg/L. SRB averaged 8.7 x 10⁴ …
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Spatial Relationship between the Trichloroethylene Degrading Bacteria Dehalococcoides Sp., Sulfate Reducers and Archaea during Reductive Dechlorination
… the domain Archaea), sulfate reducing bacteria (SRB) and Dehalococcoides sp. (DHC) are of particular interest in this study. Three different types of bench scale reactors were constructed to model different aquifer types such as sandy, silty and fractured bedrock aquifers (hereafter type 1, 2 or …
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A Comparative Analysis of the Performance and the Microbial Ecology of Biological Sulphate Reducing Reactor Systems
… innate metabolism of sulphate-reducing bacteria (SRB) which coexist within complex microbial communities. SRB themselves are a highly diverse group of anaerobic microorganisms which use sulphate as a terminal electron acceptor. The sulphide and bicarbonate produced during BSR can be used to …
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Rethinking the design and implementation of financial services for poverty reduction: A case of Northern Ghana
… Credit Union (CCU) and Sonzele Rural Bank (SRB) in Jirapa, a municipality in Northern Ghana. The study deployed a mixed-methods approach to collect data from six rural and urban communities. Data was sought from secondary sources, 20 interviews, 10 focus group discussions and 120 …
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Determining clinically relevant neuropsychological change in an epilepsy sample
… utilised standardised regression-based change (SRB) and reliable change index (RCI) methodologies to determine change on retest across cognitive domains. Both the local and North American RCIs and SRB change norms were then applied to an Australian post-operative sample to evaluate cognitive …
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Biogeochemical Transformations of Trace Element Pollutants During Coal Combustion Product Disposal
… particularly sulfate reducing bacteria (SRB). MeHg is a potent neurotoxin that biomagnifies up the aquatic food chain, presenting a human health risk-- especially to children and pregnant women. The results of the sediment-ash microcosm experiments indicated negligible net production of …
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