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 34 for “"mass change"”.
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MEMS MULTI-DOF WEAKLY COUPLED RESONATOR BASED ON MODE LOCALIZATION FOR MASS CHANGE SENSING APPLICATIONS
… the usage of nanoparticles as well quantified mass changes is described. The mass sensitivity of the coupled resonator can be characterized accordingly. It has been demonstrated that a) the resonance amplitude ratio yields a sensitivity to mass changes around two times larger than amplitude …
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Langasite bulk acoustic wave resonant sensor for high temperature applications
… partial ionic and electronic conductivities and mass change as functions of temperature, dopant level and pO₂. Given that the magnitudes of conductivity and mass change directly affect the resolution and sensitivity limits of langasite resonators, their predictions allowed for the definition of …
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Real time nanogravimetric monitoring of corrosion in radioactive environments
… in the conversion of the QCN measured frequency change to a mass change-based corrosion rate compared to the conversion of the iCORR measured by LSV with Tafel extrapolation to mass change; (iii) the provision of mechanistic insights into the action of oxalic acid on Fe-rich steels. QCN has been …
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Novel Approaches for the Measurement of Unusual Post-Translational Modifications in Neuropeptides
… D-configuration, do not result in a measurable mass change. Capillary electrophoresis combined with mass spectrometry is used to identify cells containing a D-amino acid-containing peptide found in Aplysia. These cells are then utilized in the development of a method combining the specificity of …
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Verifying the Calcium Oxychloride Threshold in Cementitious Pastes
… was evaluated using compressive strength and mass change over time in paste specimens exposed to CaCl2. Fly ash is used to replace cement (up to a 50% mass replacement) in order to limit CAOXY deterioration. While compressive strength reduction was observed in all specimens despite fly ash …
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Surface Coverage and Structure of Catalytic Monolayers on Au(111) Electrodes
… SPM. Quartz crystal microbalance studies found a mass change smaller than that expected for a full monolayer of $\alpha$-dodecatungstosilicate anions, indicating that there is only a monolayer present on the surface and that it remains in the solution layer near the electrode surface after …
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Common plastics degradation in coastal environments
… exposures at 4, 8, and 43 weeks and analyzed for change in mass, algal biofilm growth, and imaged by petrographic and electron microscopy (SEM-EDS). Significant surface erosion was evident on both polymers and was more rapid and more extensive with PS. Degradation of PS was responsive to intensity …
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Detection of Antibody-Antigen Reactions using Surface Acoustic Wave and Electrochemical Immunosensors
… Besides their extremely high sensitivity to mass loading they can be utilized for microbalances. The mass change during an antibody-antigen binding can be therefore observed by SAW sensors. In this work, ultrasonic waves were generated on the surface of lithium tantalate by inductively …
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Modelling and performance evaluation of coupled micro resonator array for artificial nose
… readout. The CMRA working principle is based on mass loading frequency response effect; the frequency response of the coupled resonators is a signature for the multiple sensors. The key research outputs are balanced effective mass of the coupled resonators for measurable response and broke the …
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Comparison of Microwave Drying and Conventional Drying of Coal
… power, initial moisture content and the sample mass. Microwave drying tests were performed under various conditions and the mass change was monitored continuously. The percentage mass loss, moisture fraction and drying rate were obtained for each experimental condition. The final temperature was …
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Investigating Mechanisms of Co-Occurrence Between Two Similar Specis of Predaceous Diving Beetles (<i>Coleoptera: Dytiscidae</i>) in Temporary Aquatic Habitats
… regardless of intra- or interspecific densities. Mass change due to prey consumption was also not affected by intra- or interspecific densities. In the field, L. proximus exhibited a higher dispersal rate compared to L. f rufus, but was not affected by either intra- or interspecific densities. …
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Simultaneous nanothermal analysis using heated microcantilevers
… Heated microcantilevers have low thermal mass, resulting in high heating rates with quick response times, and are relative isolated to major heat losses, making them well suited for nanothermal analysis. This work discusses the first reported implementation of a microsensor to perform …
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An investigation into the synthesis and characterisation of metal borohydrides for hydrogen storage
… Thermal decomposition occurred at 80°C with a mass change of 12 wt.%, associated with the evolution of hydrogen and diborane. A composite mixture with magnesium hydride a reaction between diborane and magnesium hydride was observed form magnesium borohydride. Mechanical milling of calcium …
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The development and operating characteristics of an improved plasma torch for supersonic combustion applications
… with a microscope, and by measuring the mass change of the electrodes. The electrode erosion of the improved torch was reduced significantly. Anode lifetimes of greater than 20 hours have been demonstrated with operation on mixtures of nitrogen and argon.
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The effect of dairy consumption with exercise and healthy eating on the metabolic profile in overweight/obese adolescent girls
… eucaloric weight management diet. There were no changes in the metabolic profile following the intervention, and no differences were seen between groups. Waist circumference (p=0.003) and fat mass (p<0.001) decreased and lean mass (p=0.01) increased after 12 weeks, with no differences between …
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Ultrasonic and electroplating approach for washcoat of γ-alumina and nickel oxide (nio) catalyst on fecral substrate for catalytic converter
… 12 μm. The thermal analysis shows the smallest mass change located at UB+EL 30 minutes sample for 2.85 mg. Therefore, UB+EL 30 min was selected to be a method for FeCrAl CATCO development. Coated FeCrAl CATCO more effective to reduce fuel consumption up to 1.693 L/h and increase torque of 95 Nm, …
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Cavity ring down: Construction, validation and experiments measuring the optical extinction of pure clays and their mixtures with salts and carboxylic acids under a range of atmospherically relevant conditions
… are a large fraction of the total aerosol mass and thus contribute extensively to the climate balance. Assessing this impact is complicated by the irregular shape and sheet-like structures of these species making them difficult to variability in measurements of optical properties can result …
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Mass Spectrometric Characterization and Fluorophore-Assisted Light Inactivation of Human Excitatory Amino Acid Transporter
… goal of this study was to use pharmacological, mass spectrometric (MS) and photochemical approaches to probe EAAT2. For MS characterization, a hexahis epitope was incorporated into the N-terminus of human EAAT2. The recombinant protein was functionally expressed in HEK 293T cells and purified …
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Mass Spectrometric Characterization and Fluorophore-Assisted Light Inactivation of Human Excitatory Amino Acid Transporter
… goal of this study was to use pharmacological, mass spectrometric (MS) and photochemical approaches to probe EAAT2. For MS characterization, a hexahis epitope was incorporated into the N-terminus of human EAAT2. The recombinant protein was functionally expressed in HEK 293T cells and purified …
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