Results 301 to 310 of about 549,446 (335)

A unified approach to the chromatography‐FTIR interface: GC‐FTIR, SFC‐FTIR, and HPLC‐FTIR with subnanogram detection limits

Journal of High Resolution Chromatography, 1991
AbstractThe results described in this paper demonstrate that Identifiable FTIR spectra of components separated by gas, supercritical fluid, and liquid chromatography can be measured in real time using a common approach. The sensitivity of each Interface is comparable with that obtained by interfacing the corresponding technique with a bench‐top mass ...
Andrew J. Lange, Peter R. Griffiths, Kelly L. Norton   +2 more
openaire   +2 more sources

Quantitative analysis of shales by KBr-FTIR and micro-FTIR

Fuel, 2014
Abstract Fine-grained texture, complex mineralogical composition, and diverse organic matter types cause large heterogeneity of shale, and the resulting analytical challenge can only be met with high-resolution techniques. Quantitative determination of clay minerals, quartz and carbonates, as well as organic matter in shale on a micrometer-scale is ...
Agnieszka Furmann, Arndt Schimmelmann, Maria Mastalerz, Maria Mastalerz, Yanyan Chen   +4 more
openaire   +2 more sources

FTIR And TGA/FTIR Characterization Of A Polyethylene Photodegradable Concentrate

SPIE Proceedings, 1989
An integrated thermogravimetric/Fourier transform infrared (TGA/FTIR) system is used to detect the presence of a fatty acid in a commercial, photodegradable, polyethylene concentrate. This technique is simple, rapid, convenient, and requires minimal sample manipulation. It can be very useful for monitoring the differences in resin concentrates. Results
T. Kumar, David A.C. Compton, David J. Johnson   +2 more
openaire   +2 more sources

FTIR Spectroscopy of Metalloproteins

2014
Absorption of infrared radiation by proteins gives important information about their structure and function. The most intense infrared bands correspond to the overlap of all the peptide bond absorption. Additionally, in many metalloproteins their prosthetic groups have intrinsic ligands or bind substrates/inhibitors that absorb intensively in the ...
Antonio L. De Lacey, Olaf Rüdiger, Óscar Gutiérrez-Sanz   +2 more
openaire   +3 more sources

FTIR Breast Cancer

2020
نوعان فرعيان من سرطان الثدي FTIR التصوير الطيفي A = LA سرطان الثدي B = HER2 سرطان ...
openaire   +2 more sources

FTIR rotational spectroscopy

Journal of Chemical Education, 1987
Representative examples of the spectra and the analyses for a linear molecule (HCl), a symmetric top molecule (NH3), and an assymetric top (H2O).
Ronald K. Woods, Giles Henderson
openaire   +2 more sources

Nano-FTIR of biominerals

2011 International Conference on Infrared, Millimeter, and Terahertz Waves, 2011
We apply mid-infrared near-field microscopy with broad-band spectroscopic operation to problems in biomineralization. Inspecting tooth material we find vibrational resonances of phosphate nanocrystals distinctly shifted from bulk phosphates. This is enabled by the extraordinary spectral narrowing promoted by the near-field interaction over far-field ...
Peter Fratzl, Sergiu Amarie, Fritz Keilmann, Paul Zaslansky   +3 more
openaire   +2 more sources

FTIR and the illusion of superluminality

Frontiers in Optics 2004/Laser Science XXII/Diffractive Optics and Micro-Optics/Optical Fabrication and Testing, 2004
The propagation of evanescent pulses under the conditions of frustrated internal reflection (FTIR) may appear as superluminal and non-causal, but only if it is treated as a 1D tunneling phenomenon. When its 3D nature is fully accounted for, it may be simply explained through a subluminal causal theory.
W. Luis Mochán, Vera L. Brudny
openaire   +2 more sources

Zeitaufgelöste FTIR‐Differenzspektroskopie

Nachrichten aus Chemie, Technik und Laboratorium, 1993
AbstractMit der Fourier‐Transform‐Infrarot (FTIR)‐Differenzspektroskopie lassen sich nicht nur Chromophorreaktionen von Proteinen, sondern darüber hinaus auch Reaktionen der Proteinseitengruppen und des Proteingerüsts molekular‐ und zeitaufgelöst erfassen.
Klaus Genvert, Georg Souvignier
openaire   +2 more sources