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A proton nuclear magnetic resonance instrument with a 7-tesla field was used for nuclear magnetic resonance imaging (NMRI) to study bovine, porcine, and human lenses. The NMRI images show detailed changes in the water for normal and diseased tissues. The alterations in the nucleus and the cortex in relation to the health of the tissue are clearly(More)
The diffusion of nicotine in ethanol/water mixtures into an ethylene-vinyl acetate (EVA) copolymer membrane was studied by FTIR imaging. The spatial and temporal distribution of each component in the EVA membrane was demonstrated in the FTIR images. The concentration profiles extracted from these images showed that segregation occurs during diffusion.(More)
Polymer dissolution in solvents is an important area of interest in polymer science and engineering because of its many applications in industry such as microlithography, membrane science, plastics recycling, and drug delivery. Unlike nonpolymeric materials, polymers do not dissolve instantaneously, and the dissolution is controlled by either the(More)
Polarized infrared spectra have been recorded for oriented, crystalline specimens of hyaluronates, chondroitin 4-sulfate and 6-sulfate, dermatan sulfate, and a cartilage proteoglycan, having different known chain conformations as determined by X-ray diffraction. The dichroism data for the vibrational modes of the amide and carboxyl groups have been(More)
The present study used magnetic resonance imaging (MRI) to study bovine eyes using proton magnetic resonance at a 7-tesla field. The MRI images provide detailed structural information on various sections of the ocular tissues. Detailed images of the lens show several well-defined areas of water content. Relative rankings of various structures of the eye are(More)
Laser Raman spectra of ox tibia and of reconstituted rat tail tendon have been obtained and have been compared with the infrared spectra of calcified tissue and collagen. The most intense Raman bands in the calcified tissue originate from the symmetric phosphate modes; however, several of the backbone and side chain modes of collagen are also apparent.(More)