Alloy nanoparticles (NPs) can offer a wide range of opportunities for various applications due to their composition and structure dependent properties such as multifunctionality, electronic heterogeneity, site-specific response, and multiple plasmon resonance bands. In this work, the fabrication of self-assembled PdxAg1-x NPs alloy nanostructures with distinct size, density, shape, and composit...

PURPOSE To examine the extent to which neurovascular coupling contributes to stimulus-evoked intrinsic signals in the retina. METHODS The retinas of five adult cats were examined in vivo. Animals were anesthetized and paralyzed for imaging stability. The retinas were imaged through a modified fundus camera capable of presenting patterned visual stimuli simultaneous with a diffuse near infrare...

The present study aims to determine spectral bands that are best suited for characterizing rice agronomic variables. The data for this study came from ground-level hyperspectral reflectance measurements of rice at different stage. Reflectance was measured in discrete narrow bands between 350 and 2500 nm. Observed rice agronomic variables included leaf area index (LAI), wet biomass (WBM includin...

Algorithms based on red and near infra-red (NIR) reflectances measured using field spectrometers have been previously shown to yield accurate estimates of chlorophyll-a concentration in turbid productive waters, irrespective of variations in the bio-optical characteristics of water. The objective of this study was to investigate the performance of NIR-red models when applied to multi-temporal a...

There has been a significant and growing interest in chemical imaging of pharmaceutical tablets in recent years. Technology improvements and increased use has established chemical imaging as a means of providing information on certain critical quality parameters that is not readily addressable using other techniques. In addition to major pharmaceutical manufacturers, generic manufacturers and e...

The display of a vector of data values at a set of spatiallydistributed sample points presents some interesting visualisation problems. Typical display devices provide only two spatial di mensions plus colour, making it necessary to design new methods for representing the data. This paper describes a tool under development that allows users to visualise the spatial ripening characteristics of f...

Dampening during processing or storage can largely influence the quality of white lotus seeds (WLS). This paper investigated the feasibility of using near-infrared (NIR) spectroscopy and chemometrics for rapid and nondestructive discrimination of the dampened WLS. Regular (n = 167) and dampened (n = 118) WLS objects were collected from five main producing areas and NIR reflectance spectra (4000...

PURPOSE To report a case of rare and unusual choroidal abnormalities in a 42-year-old woman with systemic lupus erythematosus (SLE). METHODS Images were obtained using fundus photography, fluorescein angiography, near-infrared reflectance (NIR) imaging, and optical coherence tomography (OCT). RESULTS The patient had a history of SLE and central retinal artery occlusion in her right eye. Fun...

Among the existing image fusion algorithms, Intensity used one. When the IHS method is used for IKONOS imagery, there is a significant color distortion, due mainly to the range of wavelengths in an IKONOS Pan ima regions are far larger than the grey values of intensity (I) and that vegetation appears of relatively high reflectance in Near Infrared (NIR) and Pan bands we propose a new technique ...

Spectroscopy is a rapid, non-destructive, and low-cost analytical technique that has the potential to complement more resource-intensive methods. We explored use of spectral methods differentiate maize genotypes assess aflatoxin (AF) contamination in kernels. compared performance two instruments: research-grade ultraviolet-visible-near infrared (UV-Vis-NIR) spectrometer measures reflectance fro...