Structure and state of water in reversed aerosol OT micelles: an infrared study

2007 ◽  
pp. 158-162
Author(s):  
G. Onori ◽  
M. D’Angelo ◽  
A. Santucci
Keyword(s):  
Infrared Study ◽  
Aerosol Ot ◽  
State Of Water

scholarly journals Water Properties of Soft Contact Lenses: A Comparative Near-Infrared Study of Two Hydrogel Materials

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Jelena Munćan ◽  
Ivana Mileusnić ◽  
Jovana Šakota Rosić ◽  
Aleksandra Vasić-Milovanović ◽  
Lidija Matija
Keyword(s):  
Water Content ◽  
Near Infrared ◽  
Contact Lenses ◽  
Polymer Network ◽  
The State ◽  
Vinyl Pyrrolidone ◽  
Soft Contact ◽  
Infrared Study ◽  
Soft Contact Lenses ◽  
State Of Water

The functionality of soft contact lenses depends strongly on the water content and their water-transport ability. This study was conducted in order to examine the state of water in two sets of soft contact lenses: VSO38, pHEMA Filcon I 1, and VSO50, copolymer of HEMA and VP Filcon II 1 (HEMA = 2-hydroxy-ethyl methacrylate; VP = vinyl pyrrolidone). Hydrogel lenses were studied using near-infrared spectroscopy and the novel Aquaphotomics approach in order to determine the state of water in materials based on their near-infrared spectra. Aquaphotomics approach investigates absorption at specific vibrational bands of water’s covalent and hydrogen bonds which can provide information on how the water structure changes with the structural change of the polymer network. Principal component analysis and specific star-chart “aquagram” were used to analyse water spectral pattern in hydrogel materials. The findings show that material VSO38 has water predominantly organized in bound state, while material with higher water content, VSO50, has more free and weakly hydrogen bonded water. Our findings define in detail exact water species existing and interacting with the polymer network. The results show qualitative and quantitative possibilities of Aquaphotomics for better modelling and understanding water behaviour in hydrogel materials.

State of water in inverse micelles of Aerosol OT, according to IR spectroscopic data

1992 ◽  
Vol 32 (4) ◽  
pp. 519-523
Author(s):  
A. P. Zhukovskii ◽  
L. N. Petrov ◽  
N. V. Rovnov
Keyword(s):  
Spectroscopic Data ◽  
Aerosol Ot ◽  
Inverse Micelles ◽  
State Of Water ◽  
Ir Spectroscopic

Calorimetnc studies on the state of water in aerosol ot reversed micelles

1990 ◽  
Vol 163 ◽  
pp. 139-146 ◽  
Author(s):  
A. Goto ◽  
H. Yoshioka ◽  
H. Kishimoto ◽  
T. Fujita
Keyword(s):  
Reversed Micelles ◽  
The State ◽  
Aerosol Ot ◽  
State Of Water

Fourier Transform Infrared Study on the State of Water Sorbed to Poly(ethylene glycol) Films†

Langmuir ◽  
2001 ◽  
Vol 17 (6) ◽  
pp. 1889-1895 ◽  
Author(s):  
Hiromi Kitano ◽  
Ken Ichikawa ◽  
Makoto Ide ◽  
Mitsuhiro Fukuda ◽  
Wataru Mizuno
Keyword(s):  
Fourier Transform ◽  
Ethylene Glycol ◽  
Fourier Transform Infrared ◽  
The State ◽  
Poly Ethylene Glycol ◽  
Infrared Study ◽  
State Of Water ◽  
Poly Ethylene

Infrared study of the state of water in the hydration shell of DNA

1970 ◽  
Vol 48 (10) ◽  
pp. 1536-1542 ◽  
Author(s):  
Michael Falk ◽  
A. G. Poole ◽  
C. G. Goymour
Keyword(s):  
Liquid Water ◽  
Low Temperatures ◽  
Hydration Shell ◽  
The State ◽  
Water Molecules ◽  
Surrounding Water ◽  
Infrared Study ◽  
Hydration Shells ◽  
State Of Water ◽  
Bond Strengths

The state of water in the hydration shell of DNA was studied by infrared spectroscopy. The stretching bands of isotopically dilute HDO adsorbed on DNA have nearly the same band profiles as those of HDO in liquid water. This indicates a distribution of hydrogen-bond strengths similar to that in liquid water. At low temperatures, the spectra show that an inner layer of about 10 water molecules per nucleotide is incapable of crystallization, even when the surrounding water crystallizes into ice I. The biopolymer hydration shells are not "ice-like" in the sense of crystalline ordering into an ice-like structure.

The state of water in acclimating vegetative buds from Malus and Amelanchier and its relationship to winter hardiness

1992 ◽  
Vol 86 (4) ◽  
pp. 503-511 ◽  
Author(s):  
Christina W. Vertucci ◽  
Cecil Stushnoff
Keyword(s):  
Winter Hardiness ◽  
The State ◽  
Vegetative Buds ◽  
State Of Water

Far infrared study of the giant star forming complex W 51

2002 ◽  
Vol 4 ◽  
pp. 333-333
Author(s):  
S. K. Ghosh ◽  
D. K. Ojha ◽  
R. P. Verma
Keyword(s):  
Far Infrared ◽  
Infrared Study ◽  
Giant Star ◽  
Star Forming
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