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Showing 1 to 20 of 21 for “"oxygen sensors"”.
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Solid Electrolyte Oxygen Sensors
… and the emergence of the solid electrolyte oxygen sensor, are traced from the last century to the present time when a number of commercial devices are marketed. General rules are set out for the choice of an electrolytic system for a solid electrolyte oxygen sensor. The major markets and …
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Use of oxygen sensors for the non destructive measurement of oxygen in packaged food and beverage products and its impact on product quality and shelf life
… investigate the ability of reversible optical O2 sensors to be incorporated into food/beverage packaging systems to continuously monitor O2 levels in a non-destructive manner immediately postpackaging and over time. Residual levels of O2 present in packs can negatively affect product quality and …
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The Development Of Mems-Based Implantable Oxygen Sensing Systems
Oxygen-based cues are direct assessments for a wide range of in vivo biological effects, ranging from mitochondrial disease to tissue engineering/regenerative medicine. Existing electrochemical oxygen sensors are permanent systems applicable to short-term intraoperative use; devices are extracted …
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Calibration of YSZ sensor for the measurement of oxygen concentration in Lbe
… essential to accurately measure and control the oxygen concentration dissolved in LBE. An automobile style voltametric oxygen sensors, with YSZ (Yttria Stabilized Zirconia) as electrolyte and molten bismuth saturated with oxygen as reference was selected. An instrumentation system was designed …
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Design, fabrication, and testing of a multichannel microfluidic device to dynamically control oxygen concentration conditions in-vitro
… and fabricated such that an array of different oxygen concentrations could be applied to a testing area in any desired sequence and with unconstraint application times. The principle of flow resistance dictates that a large channel length will impose a larger resistance and therefore a larger …
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Solid state amperometric sensor for the in-situ monitoring of slag composition and transport properties
Conventional oxygen sensors have been used for several decades for better process control in metals industries. Such devices can accurately determine the oxidation state of the molten metal phase. Investigators understand the importance of the slag phase on the quality of the final product and …
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Crystallographic origins of fast-ion conduction in pyrochlore
… for use in electrochemical devices such as oxygen sensors and solid-oxide fuel-cells. The pathway for ion conduction proposed by several authors has been a jump between equivalent nearest-neighbor oxygen sites through the tetrahedral edges of the relatively-immobile cation array. …
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Study of biomass combustion characteristics for the development of a catalytic combustor/gasifier
… from an inexpensive automobile exhaust gas oxygen sensor. The control strategies and catalytic combustion were implemented on prototype combustor/gasifier and the device was tested with good results. Power turn down ratios of 4 to 1 and 3 to 1 were achieved. The zitconia-type automobile …
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Anoxia-Mediated Electrical Suppression in the Cerebral Cortex of the Western Painted Turtle (Chrysemys picta bellii): Role of the Mitochondrion
The vertebrate brain is one of the most oxygen-demanding organs of the body. In animals that are intolerant to severe hypoxia or anoxia, the brain undergoes irreparable harm within minutes of insufficient oxygen supply. The western painted turtle (Chrysemys picta bellii) has evolved the ability to …
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Supramolecular quantum dot-porphyrin assemblies for biological oxygen sensing
… characterized by hypoxia, the concentration of oxygen is an important indicator of tumor health. Understanding how this parameter changes as a function of disease progression is critical to develop novel targeted therapeutics. New non-invasive sensors must be developed that are small enough to …
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Phosphorescent semiconductor nanocrystals and proteins for biological oxygen sensing
Oxygen is required for cellular respiration by all complex life making it a key metabolic profiling factor in biological systems. Tumors are defined by hypoxia (low pO2), which has been shown to influence response to radiation therapy and chemotheraphy. However, very little is known about …
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Integration of real time oxygen measurements with a 3D perfused tissue culture system
… with blood, which delivers nutrients, oxygen, and macromolecular regulatory molecules. In vitro culture models that incorporate local micro-perfusion in a format that allows accesses to cells and their microenvironment are desirable to a broad research community. This thesis describes a …
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The role of the chromatin remodeller ISWI in the cellular response to hypoxia
… Its levels and activity are controlled by dioxygenases called Prolyl-Hydroxylases and Factor Inhibiting HIF (FIH). In order to activate genes, HIF has to access sequences in DNA that are integrated in chromatin. It is known that the chromatin remodelling complex SWI/SNF (Switch/Sucrose …
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The role of ABHD11 in the regulation of the hypoxia inducible transcription factors
… (HIFs) mediate a highly conserved cellular oxygen sensing system, driving a diverse set of transcriptional changes that allow adaptation to hypoxic conditions. However, HIFs can also be activated independently of oxygen by changes in levels of mitochondrial metabolites, a mechanism which is …
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Development of new photoluminescent sensing materials, systems and applications for cell analysis
Cell analysis using optochemical sensors represents large and important niche in life and biomedical science. Sensor calibration and detection platforms are critical during sensor fabrication, characterization and application. However, existing calibration setups, platforms, and systems have …
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New water-soluble porphyrins for oxygen sensing in protein-based materials
Oxygen is a vital molecule for life and its precise quantification is pivotal to ensure correct functioning of cells. Instruments able to quantify accurately the oxygen levels are extremely important to understand cells behaviour especially in a three-dimension (3D) environment, where uneven …
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Multi-Physics Sensing and Real-time Quality Control in Metal Additive Manufacturing
… constructed. This platform integrates numerous sensors, including but not limited to co-axial cameras, IR cameras, oxygen sensors, photodiodes, etc. The platform allows in-process parameter adjusting, which opens the boundary to test various control theories based on multi-sensing and data …
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Development of a sensor-based rapid microbial testing platform for the Irish meat industry
… food company (Dawn Meats), several new optical oxygen sensor based systems were devised to increase efficiency and accuracy of testing. Chapter 1 (Literature review) describes the state of the art in the area, the range of existing approaches and analytical systems, and their capabilities. …
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Control of the Oxygen Content of the Cover Gas in a Molten Lead-Bismuth Eutectic System
Made available in DSpace on 2017-07-06T18:42:28Z (GMT). No. of bitstreams: 3 Bolind_Alan_M_MS.pdf: 686402 bytes, checksum: dee721ff9ec976d50dc4139bca13cf8b (MD5) Bolind_Alan_M_MS_ABS.pdf: 58527 bytes, checksum: e7e13dc0255f7e28fe3d6ab321d476e2 (MD5) license.txt: 4813 bytes, checksum: …
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