Glycine adsorption

FIGURE 5.14 Supercells used for the study of glycine adsorption on AlOOH boehmite at the interface with water in the outer-sphere adsorption mode G ft), and inner sphere adsorption mode (right). With permission ftom Motta et al. [78]. 

Garrain, P. A., D. Costa, and P. Marcus, Biomaterial-biomolecule interaction DFT-D study of glycine adsorption on Cr203. Journal of Physical Chemistry C, 2011. 115(3) p. 719-727. 

Ahmed, M.H., Byrne, J.A., Mclaughlin, J., 2012. Evaluation of glycine adsorption on diamond like carbon (DLC) and fluorinated DLC deposited by plasma-enhanced chemical vapour deposition (PECVD). Surf. Coat. Technol. 209, 8—14. http //dx.doi.org/10.1016/ j. surfcoat2012.07.011. 

S g of ethyl glycinate hydrochloride were dissolved in 400 cc of ethanol and 33.5 g of salicylic aldehyde were added. It is refluxed for half an hour and cooled. 38 cc of triethylamlne and 25 g of Raney nickel are then added whereafter hydrogenation is carried out at room temperature and under atmospheric pressure. After hydrogen adsorption was complete, the mixture was filtered and the alcohol evaporated off. The residue was taken up with acidified water, extracted with ether to eliminate part of the by-products, consisting mainly of o-cresol, then made alkaline with ammonia and extracted with ethyl acetate. The solvent was removed in vacuo and the residue crystallized from ether/petroleum ether. 36.7 g of o-hydroxybenzyl-aminoacetlc acid ethyl ester melting at 47°C are obtained. 

The chromatographic resolution of bi-naphthol enantiomers was considered for simulation purposes [18]. The chiral stationary phase is 3,5-dinitrobenzoyl phenyl-glycine bonded to silica gel and a mixture of 72 28 (v/v) heptane/isopropanol was used as eluent. The adsorption equilibrium isotherms, measured at 25 °C, are of bi-Langmuir type and were proposed by the Separex group ... 

In Section 1.2.1, we discussed the phenomenon of adsorbate-induced chirality whereby the adsorption of achiral species (e.g., glycine) results in the formation of two mirror equivalent domains on the surface. It has recently been shown that the presence of relatively small mole fractions of chiral dopants can result in the exclusive... 

McBride, M.C. (1985) Influence of glycine on Cu adsorption by micro crystalline gibbsite and goethite. Clays Clay Min. 33 397-402 McCafferty, E. Zettlemoyer, A.C. (1970) Entropy of adsorption and the mobility of water vapor on a- Fe20. J. Colloid Interface Sci. 34 452-460... 

Figure 1.10. The local adsorption geometries of glycinate on Cu(100) and Cu(110) showing the near atop bonding of the amino N atom (top left in each diagram), and the near-atop or off-atop bonding of the two carboxylate atoms at the bottom. The complete geometries shown here are as obtained from one particular set of DFT calculations [111], but are consistent with earlier experimental PhD studies of the N and local adsorption sites and with earlier DFT calculations (e.g., [116] and earlier work by this group).

The results of model compound recovery experiments, in part, support these selection criteria. For example, the anionic resin (MP-1) yielded the best recoveries of the anionic organics (little or no adsorption was observed on subsequent resins) glycine was equally distributed (but poorly recovered) on MP-1 and MP-50 (no adsorption was observed on the nonionic resins). Although some selective adsorption occurred on the lower surface area ionic resins, the nonpolar macro-porous XAD-2 showed its retentive power for low-polarity compounds as none were seen to break through to the more polar methacrylate polymer, XAD-7. XAD-7 was included in the system for use with reclaimed and surface waters (21) because literature reports indicated that the methacrylate XAD resins had significantly better retention of humics, fulvics, and smaller phenolics (9, 29, 30). However, in the... 

IAA Glycine max partition Gossypium hirsutum Sephadex-GlO Phaseolus vulgaris others anion exchange reverse phase-C adsorption fluorescence electro- chemical (61)... 

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