spectrophotometer

Quantification of RNA is essential for various molecular biology studies. In this work, three quantification methods were evaluated: ultraviolet (UV) absorbance, microcapillary electrophoresis (MCE), and fluorescence-based quantification. Viral, bacterial, and eukaryotic RNA were measured in the 500 to 0.05-ng microl(-1) range via an ND-1000 spectrophotometer (UV), Agilent RNA 6000 kits (MCE), ...

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Color stability of modern composites subjected to different periods of accelerated artificial aging.

Journal: :Brazilian dental journal 2012

Brahim Drubi-Filho Lucas da Fonseca Roberti Garcia Diogo Rodrigues Cruvinel Ana Beatriz Silva Sousa Fernanda de Carvalho Panzeri Pires-de-Souza

The aim of this study was to evaluate the color stability of composites subjected to different periods of accelerated artificial aging (AAA). A polytetrafluorethylene matrix (10 x 2 mm) was used to fabricate 24 test specimens of three different composites (n=8): Tetric Ceram (Ivoclar/Vivadent); Filtek P90 and Z250 (3M ESPE), shade A3. After light activation for 20 s (FlashLite 1401), polishing ...

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A microcomputer-based high-speed data-acquisition system for a stopped-flow spectrophotometer: PDP-11 architecture interfaced to a commercial instrument

Journal: :The Journal of Automatic Chemistry 1983

Josephina A. Alcocer David J. Livingston Gerald F. Russell Charles F. Shoemaker W. Duane Brown

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