نتایج جستجو برای: uvvis spectrophotometer

تعداد نتایج: 5703  

Journal: :Analytical biochemistry 2009
Roman Aranda Shauna M Dineen Rhonda L Craig Richard A Guerrieri James M Robertson

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), ...

2008
Ilza Dalmázio

A oxidação do paracetamol (1) promovida pelo sistema TiO 2 /UV em meio aquoso foi investigada. O contínuo monitoramento feito por várias técnicas, tais como espectroscopia UVVis, HPLC (cromatografia líquida de alta eficiência), TOC (carbono orgânico total) e ESI-MS (espectrometria de massas com ionização electrospray), mostrou que a remoção do paracetamol foi altamente eficiente, mas com um gra...

Journal: :Revista Tecnología y Ciencia 2021

Se desarrollaron sólidos nanoestructurados impregnados con diferentes contenidos de hierro (1; 2,5; 5 y 10% p/p) como catalizadores eficaces para degradar soluciones acuosas glifosato en condiciones reacción extremadamente suaves: presión atmosférica temperatura ambiente. Estos materiales se caracterizaron por XRD, fisisorción N2, UVvis-DR XPS. obtuvieron estructuras mesoporosas regulares típic...

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 ...

Journal: :The Journal of Automatic Chemistry 1983
Josephina A. Alcocer David J. Livingston Gerald F. Russell Charles F. Shoemaker W. Duane Brown

Journal: :The Journal of Automatic Chemistry 1986
D. Migneault R. Mattera R. K. Forcé

Journal: :Monthly Notices of the Royal Astronomical Society 1957

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