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 283 for “"Paper-based"”.
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Paper-Based Watermark Extraction with Image Processing
… extraction and graphical representation of paper-based watermark designs embedded in paper texture. There is a growing need for this among librarians and antiquarians to aid with identification, wider accessibility, and providing a further level of document imaging for preservation. The …
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Technological advancements towards paper-based biomolecular diagnostics
… the environment necessary for biologically-based technologies to function independently of living cells. Our lab recently developed a paper-based system for cell-free gene expression, which utilizes cell-free extracts that are freeze-dried on to paper and other porous substrates to allow for …
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Characterization of fluid flow in paper-based microfluidic devices
Paper-based microfluidic devices are being leveraged for application of diagnostic and detection technology in low-resource settings. In order to design a highly accurate device, a mathematical model is required to predict flow behaviour in the paper-based microfluidic devices. A series of …
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Improved Detection of Gold Nanoparticle Labels for Paper-Based Analytics
… through this thesis, and (b) a conductance based approach with direct measurement of electrical impedance in the detection region using hardware and software that were developed. Analysis of camera images from mobile electronic devices enables simultaneous detection of many targets on a …
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Electrochemical Tape-and-Paper-Based Sensor for the Quantification of Potassium
… and easy to fabricate electrochemical tape-and-paper-based devices. Our sensor bypasses the inconveniences of ion-selective electrodes and could ultimately serve as a point-of-care device to allow for regular monitoring or even home-use. Our sensing method relies on Prussian blue immobilized on …
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Programming of wicking behavior of hydrogel and paper-based microfluidic device
Paper-based microfluidics (μPADs) have been a popular choice as lateral flow tests (LFTs) platform for diagnostic purpose because of its ease of use, speed, affordability, and spontaneous fluid transport based on an intrinsic property of material. Recent developments have rapidly increased the …
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The fine art of electronics : paper-based circuits for creative expression
… enabled by combining circuit building with paper craft to create paper electronics-a medium that adds the magical interactivity of electronics to the physical intuitiveness and expressive potential of paper. I designed this medium to take advantage of the skills and creative associations …
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Paper-based Molecular Technologies for Faster, More Accessible Infectious Disease Diagnostics
… this issue. Diagnostic tests made from cellulose paper that use colorimetric readouts—where a visible color appears if disease biomarkers are present—have shown promise in reducing device cost, equipment and training needs. However, their ability to support a variety of diagnostic methods has not …
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Paper-Based Sensors for Contaminant Detection Using Surface Enhanced Raman Spectroscopy
… formation on wax patterned chromatography paper. In situ reduction of hydrogen tetrachloroaurate (gold precursor) by trisodium citrate dihydrate (reducing agent) was used to produce gold nanoparticles within a paper matrix. These gold nanoparticle based SERS substrates were analyzed by …
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Paper-based computer-aided form sketching : a prescribed sketching language-based approach
… efficacy in rapidly externalizing form concepts, paper-based sketching is still extensively used by practising designers. It is a common practice that form concepts are sketched on paper prior to being translated into three-dimensional (3D) virtual models for further development. A critical …
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Development of a Field-Use Paper-Based PKU Test Using Colorimetric Readout
… settings. In this report, we demonstrate a paper-based PKU test, based on a well-known enzyme colorimetric assay (ECA), which is applicable to low-resource settings. Phenylalanine dehydrogenase (PheDH) catalyzes the reaction between phenylalane (Phe) and NAD+ to produce phenylpyruvate, NH4, …
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A Paper-Based Elisa Device for the Rapid Detection of Ischemic Stroke
… of this thesis was to further develop a paper-based microfluidic device for the rapid detection of ischemic stroke using biomarkers that can be detected in the blood. This device uses HRP-based enzyme linked immunosorbent assay (ELISA) technology on a cellulose paper surface to yield a …
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Development and Characterization of Reagent Pencils for Microfluidic Paper Based Analytical Devices
<p>Microfluidic paper based analytical devices (microPADs) are a novel platform for point of care (POC) diagnostics. Limitations of reagent shelf life have been overcome with the introduction of reagent pencils as a method for solid-based reagent deposition. While useful, little work has been …
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Development of thermostable affinity reagents for low-cost, paper-based medical diagnostics
The timely diagnosis and treatment of disease in resource-constrained settings requires the development of robust point-of-care (POC) diagnostics, which provide accurate results and can be employed by users with minimal medical training and limited access to basic infrastructure. One of the most …
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Real time, integrated, paper based temperature sensor for lab on a chip device
… of the temperature sensor using filter paper impregnated with p-type colloidal PbS quantum dots is demonstrated. This sensor is later integrated into line a PDMS microfluidic device with two parallel microfluidic channels. The integrated device is chiefly to sense the difference in …
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An Investigation of Poly(N-Isopropylacrylamide) for Applications with Microfluidic Paper-Based Analytical Devices
… fluid delivery system for use with microfluidic paper-based analytical devices (microPADs). MicroPADs are postage-stamp-sized devices made out of paper that can be used as platforms for low-cost, simple-to-use point-of-care diagnostic assays. P(NIPAM) is a thermally responsive polymer that …
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Towards paper-based micro bio-sensing of biomarker anti-mycolic acid antibodies for TB diagnosis
Accessible point of care diagnosis of Tuberculosis (TB) is an essential development to better manage the global epidemic that infects 10 million people annually. Current diagnostics are centralised, causing patient loss to follow up or delays in treatment. Although serological diagnosis using …
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A paper-based, smartphone assisted assay for detection and quantification of iron in fortified foods
… develop, and validate an ASSURED-designed, paper-based assay which interfaces with a smartphone to quantify iron in fortified foods. The dissertation will accomplish the aforementioned objective using mixed-methods chapters. The first study will identify the gap in low-resource sensor …
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