Direct Anionic Effect on Water Structure and Indirect Anionic Effect on Peptide Backbone Hydration State Revealed by Thin-Layer Infrared Spectroscopy

2017 ◽  
Vol 122 (1) ◽  
pp. 68-76 ◽  
Author(s):  
Juan Zhao ◽  
Jianping Wang
Keyword(s):  
Infrared Spectroscopy ◽  
Thin Layer ◽  
Water Structure ◽  
Peptide Backbone ◽  
Hydration State ◽  
Anionic Effect

Infrared spectroscopy of highk thin layer by multiple internal reflection and attenuated total reflection

2003 ◽  
Vol 0 (8) ◽  
pp. 2961-2965 ◽  
Author(s):  
N. Rochat ◽  
K. Dabertrand ◽  
V. Cosnier ◽  
S. Zoll ◽  
P. Besson ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Thin Layer ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Internal Reflection

The Use of Thin-Layer Chromatography With Infrared Spectroscopy

1964 ◽  
pp. 119-141 ◽  
Author(s):  
Marcia K. Snavely ◽  
Jeanette G. Grasselli
Keyword(s):  
Infrared Spectroscopy ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Layer Chromatography

Identification of the Photoalteration Products Formed from Parathion by Ultraviolet Light

1974 ◽  
Vol 57 (2) ◽  
pp. 408-415
Author(s):  
Ronald L Joiner ◽  
Karl P Baetcke
Keyword(s):  
Gas Chromatography ◽  
Infrared Spectroscopy ◽  
Thin Layer ◽  
Ultraviolet Light ◽  
High Intensity ◽  
Percentage Composition ◽  
Photometric Detection ◽  
Flame Photometric Detection ◽  
Time Periods ◽  
Layer Chromatography

Abstract A comparison of the effects of various time periods of ultraviolet light on the formation of rearrangement products of parathion is presented. Twelve products were separated and identified by thin layer chromatography in 4 systems, and were confirmed by infrared spectroscopy, when possible. The effect of 2 solvents, methanol and acetone, on the formation and percentage composition of photoalteration products of parathion from high-intensity ultraviolet light is also discussed. Retention times are given for each component from gas chromatography by electron capture and flame photometric detection.

DDT-Type Compounds: Separation and Identification by a System Combining Thin Layer Chromatography, Gas Chromatography, and Infrared Spectroscopy

1968 ◽  
Vol 51 (6) ◽  
pp. 1247-1260
Author(s):  
M B Abou-Donia ◽  
D B Menzel
Keyword(s):  
Gas Chromatography ◽  
Infrared Spectroscopy ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Electron Capture ◽  
Structural Changes ◽  
Effective Technique ◽  
Rf Values ◽  
Solvent Systems ◽  
Layer Chromatography

Abstract Infrared spectroscopy, in combination with TLC and GLC, offers an effective technique for isolation, separation, and identification of DDT-type compounds. Rf values for DDT and 13 other compounds, most of which have been reported as DDT breakdown products, have been determined in 27 solvent systems, using TLC techniques. Three columns, in combination with the electron capture detector, have been experimentally studied to analyze the 13 DDT-like compounds. The positions and intensities of the infrared bands of the 14 compounds have been measured in KBr. The variations of these measurements have been discussed in relation to the structural changes of DDT-type compounds.

Assessment of Embryonic Bioactivity through Changes in the Water Structure Using Near-Infrared Spectroscopy and Imaging

2020 ◽  
Vol 92 (12) ◽  
pp. 8133-8141
Author(s):  
Mika Ishigaki ◽  
Yui Yasui ◽  
Misato Kajita ◽  
Yukihiro Ozaki
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Water Structure

The production of α-hydroxyglutaric acid from glutamic acid by cell-free preparations of Peptococcus aerogenes

1969 ◽  
Vol 47 (12) ◽  
pp. 1103-1107 ◽  
Author(s):  
W. M. Johnson ◽  
D. W. S. Westlake
Keyword(s):  
Mass Spectrometry ◽  
Infrared Spectroscopy ◽  
Thin Layer ◽  
Glutamic Acid ◽  
Anion Exchange Chromatography ◽  
Exchange Chromatography ◽  
Factors Affecting ◽  
The One ◽  
Layer Chromatography ◽  
Hydroxyglutaric Acid

Active cell-free extracts of Peptococcus aerogenes were prepared which metabolized glutamic acid to α-hydroxyglutaric acid. Factors affecting the formation of this intermediate were studied by following the conversion of glutamic acid labelled with 14C in the one or five positions. The results of these experiments revealed that the production of α-hydroxyglutaric acid from glutamic acid by cell-free extracts was NAD-dependent. The labelled α-hydroxyglutaric acid produced by NAD-supplemented extracts was purified by anion exchange chromatography and identified by several methods including paper and thin-layer chromatography, mass spectrometry, and infrared spectroscopy. A pathway has been proposed for the conversion of glutamic acid to α-hydroxyglutaric acid by cell-free extracts of P. aerogenes.

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