Fourier transform infrared studies membranes

Seto, G. W., Marwaha, S., Kobewka, D. M., et al. (2007) Interactions of the Australian tree frog antimicrobial peptides aurein 1.2, citropin 1.1 and maculatin 1.1 with lipid model membranes Differential scanning calorimetric and Fourier transform infrared spectroscopic studies. Biochimica et Biophysica Acta, 1768, 2787-2800. 

The state of water in a membrane can become important for RO membranes as it is often related to rejection. Murphy and dePinho (1995) studied the state of water in RO and UF membrane active layers using attenuated total reflection fourier transform infrared spectroscopy (ATR-FTIR). Water content increased with porosity, and the strucmre of the water was dependent on average pore size. Large clusters of water were linked to low salt rejection, whereas low association of water in clusters indicated a low permeability to salt. 

Umezawa, K. Lin, X.M. Nishizawa. S. Sugawara, M. Umezawa, Y. Cation permselectivity in the phase boundary of ionophore-incorporated solvent polymeric membranes as studied by fourier transform infrared attenuated total reflection spectrometry. Anal. Chim. Acta 1993. 282. 247-257. 

Fourier-transform infrared (FTIR) spectroscopy is particularly useful for probing the structures of membrane proteins [3, 23]. This technique can be used to study the secondary structures of proteins, both in their native environment as well as after reconstitution into model membranes. Myelin basic protein (MBP) is a major protein of the nervous system and has been studied by using FTIR spectroscopy in both aqueous solution and after reconstitution in myelin lipids [24]. The amide I band of MBP in D2O solution (deconvolved and curve-fitted) is... 

Mantsch H H, Cameron D G, Umemura J, Casal H L 1980 Fourier transform infrared spectroscopy of aqueous systems applications to the study of biological membranes. J Mol Struc 60 263-268... 

Lewis, R.N., McElhaney, R.N. Membrane lipid phase transitions and phase organization studied by Fourier transform infrared spectroscopy. Biochim. Biophys. Acta 1828, 2347-2358 (2013)... 

Taddei and co-workers [42] investigated the kinetics and mechanism of in vitro and in vivo degradation of Vicryl (lactide-glycolide copolymer) periodontal mesh, using Fourier-Transform Raman, attenuated total reflectance/Fourier-Transform-infrared (FT-IR) spectroscopy and DSC. A saline phosphate buffer and a sodium hydroxide solution were used as the aqueous media to study the hydrolytic in vitro degradation and the membrane implanted in vivo for four weeks. 

The results from this study were compared with the results reported in the hterature (Quinn and Laciak, 1997 Quinn et al., 1997) and our previous results (Tee et al., 2006) in Table 28.2. As we can see from the comparison, the results from this work are gratifying. The improvement in the working temperature over our previous work could be mostly attributed to better cross-linking of PVA as the polymer matrix, which was confirmed by Fourier transform infrared spectroscopy (FTIR). The high permeability and selectivity were presumably attributable to better carriers since the membranes contained both AIBA-K and KHCO3-K2CO3 as the mobile carriers and poly(allylamine) as the fixed carrier. 

Spectral studies such as Fourier transform infrared/attenuated total reflectance (FTIR/ATR) analysis, solid-state or pulse field gradient (PFG) nuclear magnetic resonance (NMR), x-ray diffraction (XRD) or small angle x-ray scattering (SAXS) analysis, and Raman study are basically the characterization methods for hybrid/ composite membranes. Sometimes, the multiple spectral analyses are necessary to better understand the structure-property relationship for a kind of composite polyelectrolytes. 

THE APPLICATION OF FOURIER TRANSFORM INFRARED SPECTROSCOPY TO THE STUDY OF MEMBRANES. 

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