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Showing 1 to 14 of 14 for “"tellurite"”.
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Structural relaxations of glass-forming alkali-borate and alkali-tellurite in the GHz frequency range
… alkali-borate and fragile glass-forming alkali-tellurite systems. Lithium, sodium, and potassium, were added to the systems to determine their influence on the structure and degree of networking in these melts.
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Mechanisms of anaerobic nitric oxide detoxification by Salmonella enterica serovar Typhimurium
… function, some of which contain domains for tellurite resistance. Single and combination deletion strains have shown that these genes are important to decrease anaerobic NO sensitivity of S. Typhimurium and for intracellular survival in murine macrophages. Furthermore, we have shown for the …
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Adaptation and Protein Quality Control Under Metalloid Stress
… cell encounters arsenite. The mechanisms behind tellurite toxicity have eluded scientists for over a century. By using a genome-wide phenotypic screen, it was found that tellurite toxicity is linked to accumulation of elemental tellurium. Sulfate metabolism and mitochondrial respiration were …
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Genetic relatedness of the family Rhodospirillaceae: Genome plasticity, chromosome heterogeneity, and chalcogenic oxyanion reductase activity in Rhodobacter sphaeroides
"Intrinsic high-level resistance (HLR) to tellurite (TeO$\sb3\sp{2-}),$ selenite (SeO$\sb3\sp{2-}),$ and at least fifteen other chalcogenic oxides and oxyanions has been demonstrated in the facultative photoheterotrophic bacterium, Rhodobacter (Rba.) sphaeroides. Detailed analyses have shown that …
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Direct Nonlinear Optics Measurements Of Raman Gain In Bulk Glasses And Estimates Of Fiber Performance
… A number of glass families were investigated. Tellurites with added oxides of tungsten, niobium, and thallium produced the largest Raman gain coefficients of any oxide family reported to date, typically 30-50 times higher than that of fused silica. On the other hand, phosphate families were …
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Raman Spectroscopy Of Glasseswith High And Broad Raman Gain In The Boson Peak Region
… resolved Raman spectra of glasses based on tellurite and phosphate formers have been measured from 6 – 1500 cm-1 using an excitation wavelength of 514 nm. The Tellurite glasses exhibit Raman Spectra at least 10 times more intense, are more spectrally uniform and possess spectral bandwidths …
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One Health-One City; the extent of Shiga-toxin producing Escherichia coli in Cape Town
… and antimicrobial resistance properties of tellurite resistant diarrheic E. coli isolated on CHROMagar(TM)STEC (CHROMagar Microbiology, Paris, France). Deploying the One - Health surveillance approach to study selected diarrheic bacterial pathogens in an informal settlement setting, this …
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Exploring possibilities to enhance silicon solar cell efficiency by downconversion of sunlight.
… investigated solar downconverters consisting of tellurite glass. Their fabrication process is discussed followed by the experimental characterization. Optical measurements such as absorption spectra, fluorescence spectra and fluorescence quantum efficiency are undertaken. These optical …
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Optimization of automated immunomagnetic separation for the detection of escherichia coli 0157: H7 by quantitative polymerase chain reaction
… MacConkey medium containing cefixime and tellurite. The use of MyOneTh' Dynabeads® helped to increase the available surface area allowing enhanced capture of target organisms with the new AIMS protocol. This was flirthered by the CST® Nucleic acid extraction kit to provide superior …
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Role of Bacterial Lipocalin Proteins in Antimicrobial Resistance
… that stimulate peroxidative stress (e.g. Tellurite treatment, cold stress and salt stress). Peroxidation also affects the functionality of the bacterial outer membrane. Absence of BcnA compromises the permeability of the outer membrane, resulting in the release of extracellular DNA leading …
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A Study of the Identity, Distribution and Survival of Faecal Streptococci in Polluted Watercourses
… and minimum effort: growth in 0.04% potassium tellurite, growth at 50°C, triphenyltetrazolium chloride reduction in liquid medium at pH 6.0, acid production from citrate, glycerol and melezitose, and tyrosine decarboxylation. The efficiency of four different media used for the recovery of …
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New optical fibre based technologies and their application in highly nonlinear systems
… fibres in the mid-IR is also investigated. Tellurite holey fibres with different core sizes and hole arrangements are employed in a supercontinuum generation scheme.
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High Gain / Broadband Oxide Glasses For Next Generation Raman Amplifiers
… times the bandwidth of SiO2. On the other hand, tellurite-based glasses appear to be promising candidates for high gain discrete Raman applications, providing peak Raman gain coefficients of up to 50 times higher than SiO2, at 1064 nm. Although, visible spontaneous Raman scattering cross-section …
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Investigation of High-Nonlinearity Glass Fibers for Potential Applications in Ultrafast Nonlinear Fiber Devices
… materials of Litharge, Bismite, Tellurite, and Chalcogenide glasses have been considered. Although they have high nonlinearities, they also have high group-velocity dispersion and high losses deteriorating the performance of nonlinear fiber devices seriously. The aim of this work …