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 175 for “"near Infrared (NIR)"”.
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A battery powered near infrared (NIR) camera for the MIT HelioDome
… photosensors, that cover the visible and near infrared portions of the sunlight spectrum. Two cameras are used in this device: a charge couple device (CCD) camera using silicon detectors and a near infrared (NIR) camera using InGaAs sensors. Both cameras are mounted to a table which has …
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Near-Infrared (NIR) Spectroscopy-based Pharmaceutical Process Analytical Technology (PAT) Systems: Risk and Performance
… ensuring quality of final drug products.</p> <p>Near-Infrared (NIR) spectroscopy is a commonly used analytical part of the PAT toolbox. It offers advantages such as rapid/non-destructive analysis, limited sample preparation, and specificity to physical/chemical quality attributes. The …
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Next generation near infrared (NIR) and shortwave infrared (SWIR) wearables for breast cancer imaging
… This noninvasive and inexpensive technology uses near or shortwave infrared (NIR or SWIR) light to illuminate tissue, and detects multiply-scattered photons. However, bulky instrumentation and complicated imaging procedures have limited the clinical adoption of this technology. Furthermore, …
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Monitoring Bacteria Cultures Using Near Infrared (nir) Binary Spectronephelometry (bsn), Raman Spectra and Principal Component Analysis (pca)
… all growth media, the results confirmed the linear dependence of the two measured signals on the concentration of bacteria and medium dilutions, and agreement with OD600. Having thus confirmed basic assumptions and a calibrated algorithm, various bacteria cultures were monitored over time, …
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Super star cluster candidates in the star-forming regions of luminous infrared galaxies
… of a representative sample of local luminous infrared galaxies (LIRGs) using KS-band near-infrared (NIR) adaptive optics imaging with GEMINI/ALTAIR and VLT/NACO instruments. The evolution of the cosmic star formation rate (CSFR) indicates its rapid decline in the local Universe.
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Polymer Dynamic Organic Theranostic Spheres for Photothermal Therapy and Fluorescent Imaging of Cancer
… Specifically, nanoparticles that absorb in the near infrared (NIR) region of light, 700 - 900 nm, are optimal because these wavelengths are an absorption minimum for water, hemoglobin, and deoxygenated hemoglobin. As these wavelengths are where tissues are most transparent, NIR photothermal …
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Intrinsic Spectroscopic Tumor Markers Revealed by Double-Differential Analysis of Near-Infrared Absorption Spectra
"Near infrared (NIR) optical methods provide contrast based on quantitative functional changes in tissue. NIR techniques have shown to be sensitive to changes in breast physiology from disease by quantifying total hemoglobin (oxyhemoglobin and deoxyhemoglobin), oxygen saturation, fat content, and …
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Synthesis, Physical Properties and Applications of Bisanthene-based Near Infrared Dyes and Semiconductors
… aspects: (1) Synthesis of new soluble and stable near infrared (NIR) dyes based on bisanthene by substitution at its active meso-positions with aryl or alkyne group. (2) To construct more extended p-systems based on bisanthene via Diels-Alder reaction with dienophiles at the bay regions. (3) …
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Experimental evaluation of near infrared light penetration into neural tissue
Near infrared (NIR) lasers find applications in medicine both for diagnostic and treatment purposes. Penetration depth into the tissue is a critical parameter to be considered in these NIR laser applications. Published data on the optical properties of rodent neural tissue are rare, despite the …
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Multispectral Remote Sensing of the Earth and Environment Using KHawk Unmanned Aircraft Systems
… of multispectral aerial maps including red, near infrared (NIR) and colored infrared (CIR) maps. A robust Normalized Difference Vegetation index (NDVI) calibration procedure is proposed and validated by ground tests and KHawk flight test. Finally, the generated aerial maps and their …
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Detection of Biologically Relevant Anions by Fluorescence and NIR Molecular Probes
… leaves. The second part has demonstrated that a near infrared (NIR) active mixed-valence diruthenium complex can catalyze the air oxidation of HS- to generate hydrogen peroxide, disulfane, and elemental sulfur. The NIR probe provides a convenient way for the detection of the HS- generation rate …
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LS301 Fluorescence-guided Photodynamic Therapy of brain cancer using PpIX photosensitizer
… penetration depth. LS301 is a tumor-targeted near-infrared (NIR) contrast agent developed in our lab which allows deeper tumor imaging and avoids autofluorescence. My project aims to investigate whether LS301 can improve PpIX mediated PDT and tumor removal surgery. We have demonstrated …
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Nanoshells in vivo imaging using two-photon excitation microscopy
… the development and optical characterization of near infrared (NIR) gold nanoshells for the use as luminescent contrast agents for applications in small animal blood vessel imaging. Two types of gold-silica nanoshells excitable by NIR lasers are investigated: Type 1 nanoshells can be excited with …
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MULTIPHOTON ABSORPTION IN MONOLAYER TRANSITION METAL DICHALCOGENIDES
… are of paramount importance to next-generation, infrared photo-detection. In this thesis, degenerate two-photon absorption (2PA) and three-photon absorption (3PA) with two-dimensional (2D) excitonic effects are studied in single-layer molybdenum disulfide (1L-MoS2). Both 2PA and 3PA coefficients …
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Finite element modeling of temperature elevation due to NIR exposure in neural tissue
Near infrared (NIR) lasers have been used in various types of medical applications. Heating is one of the most important concerns in the neural tissue when illuminated with NIR light. Rodent models are frequently used to study laser-tissue interactions. As a part of ongoing research project in the …
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Developing transition metal dichalcogenide alloys for applications to integrated photonics
… integrated circuits (PIC). We measure the near-infrared (NIR) optical properties of bulk crystal telluride TMDs and sulfide TMDs. We find that telluride TMDs have large optical density and large optical contrast, but the loss is too high. The sulfide TMDs have lower loss, but the phase …
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Investigation and Characterization of Composite Silica Aerogel Nanostructures Obtained Via Magnetron Sputtering
… spectra revealed reduced transmission in the near-infrared (NIR) and mid-infrared (MIR) regions with increasing Cu thickness. Infrared imaging showed a photothermal effect. The temperatures of samples comprising 100 nm of Cu sputtered onto Silica aerogels reached 94.8°C under solar-simulated …
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Design, Synthesis, and Characterization of Glycodendrons Through Small Molecule and Linear Polymer Models
… long-term goal of increasing biocompatibility of near infrared (NIR) fluorophores for bioimaging applications. A design of experiments was used with small molecule model compounds to determine the parameters for successful thiol-ene click reactions that would lead to success of more complicated …
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The validity of percent body fat estimates by Jackson & Pollock skinfold equation, near infrared, bioelectrical impedance and body mass index
… equation (JPSF), bioeletrical impedance (BIA), near infrared (NIR) and body mass index (BMI) when compared to the criterion method of underwater weighing (UWW). Skinfolds were measured at four sites, the triceps, ilium, abdomen and thigh using the Harpenden skinfold caliper. The Jackson & …
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