Micro-tomographic and infrared spectral data mining for breast cancer diagnosis
Shanshan GuoJunshan XiuLingnan KongXin KongHanqiu WangZhiwei LüFamei XuJing LiTe JiFuli WangHuiqiang Liu
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Attenuated total reflection
The structure of leather material was analyzed by fourier transform attenuated total reflection infrared spectroscopy(ATR-FTIR),which can be used to distinguish real leather and artificial leather quickly according to different ATR spectrums without destroying samples.
Attenuated total reflection
Fourier transform spectroscopy
Reflection
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Ultrafast two-dimensional infrared (2D IR) spectroscopy and Fourier transform infrared (FTIR) spectroscopy are often performed in tandem, with FTIR typically used to interpret and provide hypotheses for 2D IR experiments. Comparisons between 2D IR and FTIR spectra can also be used to examine the structure and orientation in systems of coupled vibrational chromophores. The most common method for comparing 2D IR and FTIR lineshapes, the diagonal slice method, contains significant artifacts when applied to oscillators with low anharmonicities. Here, we introduce a new technique, the pump slice amplitude (PSA) method, for relating 2D IR lineshapes to FTIR lineshapes and compare PSAs against diagonal slices using theoretical and experimental spectra. We find that PSAs are significantly more similar to FTIR lineshapes than diagonal slices in systems with low anharmonicity.
Two-dimensional infrared spectroscopy
Fourier transform spectroscopy
Chromophore
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Attenuated total reflection
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Some polyisoprene samples of different microstructure contents were studied by Fourier transform infrared (FTIR) and 1 H Nuclear magnetic resonance ( 1 H NMR). On the basis of detailed analysis of FTIR spectra of polyisoprene, the shift of absorption peaks caused by microstructure content’s variation was discussed. The contents of the polyisoprene samples’ microstructure which was determined by the 1 H NMR was used as the standard. Through the choice, calculation, and comparison with the corresponding absorption peaks of FTIR, a method based on the results of the analysis has been developed for the determination of the microstructure contents of polyisoprene by FTIR.
Proton NMR
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A Fourier transform infrared (FTIR) microspectrometer combines use of a microscope that has been adapted to a conventional instrument. Since this spectrometer measures the interaction of infrared light with matter, we must first discuss basic principles of light and matter. This chapter presents step-by-step procedures to help the student develop a basic understanding of: general infrared spectrometry principles, general micro-FTIR principles, sample preparation for micro-FTIR analysis, use of the FTIR microspectrometer to identify paint characteristics, and use of the FTIR microspectrometer to identify fiber characteristics. The FTIR microspectrometer is composed of an interferometer that is an instrument that divides a beam of light into two beams and then recombines the light after introducing a phase difference in one of the beams. The chapter concludes with equipment and supplies, report questions, and report requirements.
Fourier transform spectroscopy
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Attenuated total reflection
Overlayer
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The speed and specificity of Fourier Transform Infrared Spectroscopy (FTIR) affords great advantages in the study of chemical reactions. Reactants, intermediates, and products can be monitored in-situ and in real time, under reaction conditions.
Fourier transform spectroscopy
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Infrared spectral analysis is a commonly used means to research the characteristics of mineral material. Attenuated total internal reflectance infrared spectroscopy (ATR -FTIR) is widely used dues to its advantages such as rapidness, non-destructiveness and micro region detection. This paper focuses on different areas of amber, copal resin, coated amber to further study its ATR-FTIR through the BRUKER LUMOS independent type infrared microscope. The result shows: the two infrared absorption spectrum which are 1 643 cm-1 due to stretching vibration of ν(CC) and 889 cm-1 due to deformation vibration of δ(arene C—H)are present in the amber originated in Dominica and Russia; the infrared absorption spectrum band lies at 1 300～925 cm-1 due to stretching vibration of ν(C—O) has a certain instruction significance for the origin of amber; the three absorption spectrum of 3 080 cm-1 which is due to dis-symmetry stretching vibration of νas(CH2), 1 643 and 887 cm-1 can be used as characteristic of copal resin and have identification significance; coated amber displays amber and artificial resin mixing infrared spectrum, which besides the characteristic infrared spectrum of amber, 760 and 702 cm-1 infrared spectrum are caused by out-plane bending vibration of γ(arene C—H) of resin. ATR-FTIR has important significance in the identification of cause, origin and enhancement varieties of amber.
Attenuated total reflection
Absorption band
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The analysis of fluorocarbon lubricant on magnetic storage disks by Fourier transform Infrared external reflectance spectroscopy is presented. Optimization of parameters for the analysis is discussed and methods of quantitative analysis are proposed. Results from a dedicated accessory for the task are shown.
Fourier transform spectroscopy
Attenuated total reflection
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