Hadamard transform spatial multiplexing techniques are applied to laser densitometry in order to prevent the photo-induced degradation of sensitive materials. Photochemical and thermal degradations can often occur in point focused scanning laser densitometry. In spatial multiplexing, the excitation source is defocused and efficiently distributed throughout the sample, reducing local power densi...

Electrophoregrams with bands of green chlorophyll-containing protein complexes separated by native polyacrylamide gel electrophoresis (PAGE) are usually photographed in white light or scanned by a narrow beam of monochromatic light using densitometers. Present CCD cameras allow taking densitograms of a whole gel surface with many samples. However, commercial CCD imaging systems use mostly white...

Analytical gel densitometry has become a mainstream technique for quantifying DNA. Unlike other methods such as spectrophotometry and the colorimetric diphenylamine assay, gel analysis provides both qualitative and quantitative assessments of a DNA preparation. A gel picture, for example, provides a wealth of information such as quality of the DNA, and, to a certain extent, the contamination by...

This study presents the outcome of osteoporosis treatment in a 29-year-old male patient with full-blown Touraine-Solente-Gole syndrome. His first DXA densitometry of the proximal femur demonstrated severe osteoporosis (BMD 0.628 g/cm(2); T-score -3.84 SD, Z-score -3.37 SD). Bisphosphonate treatment (alendronate 70 mg once weekly) produced considerable clinical improvement during a 36-month foll...

the use of panoramic radiography, due to its numerous advantages, is increasing. radiographic films used in this technique are of double emulsion (de) type which are used with intensifying screens. single emulsion (se) films can also be used. the purpose of this study was to determine the exposure parameters to achieve an appropriate optical density in these two types of films, and to estimate ...