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 24 for “"colloidal gold"”.
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Assembly of Conductive Colloidal Gold Electrodes on Flexible Polymeric Substrates using Solution-Based Methods
This work describes the techniques of assembling colloidal gold on flexible polymeric substrates from solution. The process takes advantage of the strong affinity of gold to thiol and amino groups. Polymeric substrates were modified with silanes having these functional groups prior to Au attachment …
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Colloidal Gold as Molecular Capture Devices in Hybrid Nano/microfluidic Systems for Mass-Limited Sample Analysis
Analyte capture by the colloidal gold was demonstrated in a hybrid nano/microfluidic device designed for sequential fluid manipulations in three dimensions. A nanocapillary array membrane (NCAM) was utilized to enable efficient mixing of the gold colloid and the adsorbate in-device. Fluorescence …
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Synthesis, surface modifications and biomedical applications of colloidal gold nanoparticles, towards controlled regulation of angiogenesis in conjunction with photo-thermal therapy
The unique optical properties of colloidal gold nanoparticles: high extinction coefficient and adjustable plasmon band, as well as their excellent biocompatibility (low toxicity and a natural affinity towards thiols and amines) make them very attractive materials for biomedical research. In this …
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Receptor-mediated endocytosis of low density lipoproteins in aortic endothelial cells
… investigated at the ultrastructural level using colloidal gold-conjugated LDL as a probe, and similarly labelled antibodies as probes. Whole-mounted cells with receptor probes bound to them were examined directly in the transmission electron microscope. The topographical distribution of LDL …
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Synthesis and Cytotoxicity Studies of Gold Nanoparticle Systems
… thioalkylated polyethelene glycol (PEG)-capped gold monolayer protected clusters (MPCs) has been successfully conducted. This followed a series of aqueous and nonaqueous synthetic protocols carried out to synthesize gold nanoparticles and MPCs of sizes ranging between 4 – 200 nm. …
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Optical diffraction-based silicon sensors for the detection of DNA sequences
… detection of complementary DNA sequences using colloidal gold labels. In-depth analysis of variations of DNA sequence within the human genome and association with diseases is expected to lead to personalised medical treatment. There is a great need for DNA analysis technologies and for …
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Dual-modality thermoacoustic and photoacoustic imaging
… photoacoustic imaging using unique "soft-type" colloidal gold nanobeacons: GNBs) in the near-infrared region. GNBs represent a novel class of stable, colloidal gold nanoparticles, incorporating small metallic gold nanoparticles that can clear from the body when the particles are metabolically …
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Preparation and evaluation of polymer microspheres for enhanced lateral flow immunoassay: the case study for malaria
… explored and compared against the current ‘gold' standard detection agent for lateral flow, colloidal gold. Malaria was selected as a suitable target for evaluation of the microsphere technology since it is considered to be a global epidemic that can benefit greatly from improved …
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Applying secondary ion mass spectrometry to cellular and model membranes to image component distribution and quantify composition
… the synthesis of fluorine-functionalized colloidal gold immunolabels that facilitate the imaging of specific proteins in parallel with stable isotope labeled lipids in the cellular membrane using high-resolution SIMS performed with a NanoSIMS. Further, the spatial statistical analysis …
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The Synthesis and Host-Guest Applications of Synthetic Receptor Molecules
… interactions to create optical sensors with colloidal gold and Dip-Pen nanolithography technologies. Gold nanoparticles, have been functionalized with DNA, and have been developed as a selective colorimetric detection system, that upon binding turns the solution from a red to blue in …
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The Liver as a Target Organ for the Non-Genomic Actions of Estrogen
… proteins from the P3 fraction. I then use a colloidal gold-labeled, estrogen-containing ligand and electron microscopy of Hep G2 cells to directly visualize the uptake and translocation of the ligand. I confirm the receptor-mediated endocytosis of the ligand and identify the mitochondria as …
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Polianilino ir pilipirolo, aukso nanodalelių bei įvairių elektronų pernašos tarpininkų taikymas gliukozės biologiniuose jutikliuose /
… surface and synthesis of glucose oxidase and gold nanoparticles embedded in a layer of polyaniline nanocomposite structures. Key analytical characteristics of glucose biosensor modified by nanocomposite structures were analyzed and compared. In further studies it was shown that the polymeric …
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Polianilino ir polipirolo, aukso nanodalelių bei įvairių elektronų pernašos tarpininkų taikymas gliukozės biologiniuose jutikliuose /
… surface and synthesis of glucose oxidase and gold nanoparticles embedded in a layer of polyaniline nanocomposite structures. Key analytical characteristics of glucose biosensor modified by nanocomposite structures were analyzed and compared. In further studies it was shown that the polymeric …
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Effects of Metallic Nanoalloys on Dye Fluorescence
… focused on the optical characterization of colloidal gold-silver alloy NPs containing different ratios of gold and silver (Au<sub>1.00</sub>-Ag<sub>0.00</sub>, Au<sub>0.75</sub>-Ag<sub>0.25</sub>, Au<sub>0.50</sub>-Ag<sub>0.50</sub>, and Au<sub>0.25</sub>-Ag<sub>0.75</sub>), as well as their …
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Syntheses and Bioactivities of Targeted and Conformationally Restrained Taxol Analogs
… estrogen receptor (ER) directed targeting and colloidal gold (cAu)directed targeting, were used in our research. In this dissertation, a series of estradiol-taxol conjugates (ETCs) were synthesized. They were active in four cytotoxicity assays and tubulin polymerization assay, but less active …
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Fingermark Enhancement on Metallic Surfaces
… study has shown that it is possible to prepare gold nanoparticles by laser ablation and incorporate them in a technique that uses colloidal gold solutions (SMD-II) and show potential as a novel source of gold nanoparticles for latent fingermark enhancement. <br/><br/>The survival of fingerprints …
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Role of the colonic lymphoglandular complex in mucosal immunity in swine
… cationized ferritin, and a bovine serum albumin-colloidal gold conjugate into ligated colonic loops of four anesthetized juvenile pigs. By light microscopy, beads, ink, and virulent bacteria were in and beneath the epithelial layer. Bacteria were seen in and beneath epithelial cells by electron …
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