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Biomedical subjects

G Becerra

Publications and source records attributed to G Becerra.

3 recordsLinked to original sources

Supercritical fluid chromatography in drug analysis: a literature survey.

The applications of supercritical fluid chromatography to the analysis of drugs have been carefully revised from the literature compiled in the Analytical Abstracts until March 1994. Easy-to-read tables provide useful information about the state-of-the-art and possibilities offered by SFC in pharmaceutical analysis. The tables comprise extensive data about samples analyzed, pharmaceutical principles determined, solvents used and sample quantity injected, supercritical fluids and modifiers employed, injection system, instrumentation, experimental conditions for chromatographic separations (density, pressure, flow, temperature), characteristics of columns employed (type, support, length, diameter, particle film thickness, stationary phase), detectors, type of restrictors, and also some analytical features of the methods developed (such as retention time, resolution, sensitivity, limit of detection and relative standard deviation).

Journal Article↗

A classification of precision attachments.

This overview of attachments is intended to provide an explanation of the design characteristics of 13 different groups. The clinical situation for which an attachment is intended will place specific demands that can be met more closely if the forces acting on the prosthesis are considered. No universal or ideal design is available, so if attachments are used, they should be selected from the group with the most suitable characteristics for the task required. The stress-breaking effect of attachments is vague. They offer a potential for rotational and resilient movement between the prosthesis and the abutment teeth, but the amount of stress that must be broken to protect the periodontium of the teeth may exceed the capabilities of any particular attachment used. Nevertheless, attachments can provide an effective answer to prosthesis stability and retention in a way that is cosmetically pleasing.

Denture Design↗