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Europium(III) complexed by HPSEC size-fractions of a vertisol humic acid: small differences evidenced by time-resolved luminescence spectroscopy

, : Europium(III) complexed by HPSEC size-fractions of a vertisol humic acid: small differences evidenced by time-resolved luminescence spectroscopy. Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy 78(3): 1173-1179

The size fractionation of a humic acid (HA) by high performance size exclusion chromatography (HPSEC) was used as a proxy for the filtration effect during HA transport through a porous medium with minimum specific chemical interactions. The modification of the Eu(III)-HA complexes' formation with the different size-fractions, as compared to the bulk HA, was studied in time-resolved luminescence spectroscopy (TRLS). Clear modifications in Eu(III)-HA complexes' structures were shown and related to the molecular characteristics of the separated size-fractions. The properties of most of size-fractions did not induce a major alteration of the affinity towards Eu(III). Only the most hydrophilic fractions eluted in the tail of the chromatographic peak, representing about 11% of total fractions-weight, gave some significantly different parameters. Using a simplistic complexation model, it was found that the available complexation sites decreased with the size reduction of humic fractions.


PMID: 21242102

DOI: 10.1016/j.saa.2010.12.075

Other references

Borden, R.J., 1942: Juice quality affected by lodging. Based on pot expts., it was detd. that the juice quality of the prostrate portions of lodged plants of sugarcane was poorer than similar parts of erect plants. The effect of lodging were not modified by the application of N.

Vidal, J.; Salager, J., 1966: Apropos of diagnostic errors concerning bronchial cancer. Marseille Medical 103(11): 898-900

Gielkens, A.; Ellens, D., 1981: Application of purified 5-aminosalicyclic acid as substrate in enzyme-linked immunosorbent assay (ELISA). Current topics in veterinary medicine and animal science3(13): 33-39

Denny, F.W.; Glezen, W.P.; Karzon, D.T.; Katz, S.L.; Krugman, S.; McIntosh, K.; Parrott, R.H., 1976: Swine-like influenza vaccine: a commentary. Journal of Pediatrics 88(6): 1057-1057

Berteau P.E.; Deen W.A.; Dimmick R.L., 1977: Effect of particle size on the inhalation toxicity of naled aerosols. Toxicology & Applied Pharmacology 41(1): 183

Moore, M.W.; Durdik, J.; Persiani, D.M.; Selsing, E., 1985: Deletions of kappa chain constant region genes in mouse lambda chain-producing B cells involve intrachromosomal DNA recombinations similar to V-J joining. We isolated and characterized the germ-line counterpart of a DNA segment designated RS (for recombining sequence), that is frequently recombined in mouse lambda light chain-producing B lymphocytes. Using Southern blot analyses of myelomas and mous...

Colombo, A.; Valenti, G., 1982: Neuro-Behçet's disease. Case description and review of the literature. Rivista di Neurologia 52(2): 97-107

Heyne, E.G.; Finney, K.F., 1953: F2 progeny test for determination of bread baking quality in hard red winter wheat. Milling and baking tests substantiated the hypothesis that evaluation of flour quality in the F5 and F6 of the bulk increase of F2 plants is a satisfactory method of selection.

Liang, G.F.; Mao, H.Y.; Guo, Q.G.; Zhou, B.C.; Feng, Y.B.; Qian, S.L., 1985: Subacute toxicity of rhomotoxin in rabbits. Acta Academiae Medicinae Wuhan 5(4): 244-246

Born Axel, 1933: Zum Problem der Vertikalverschiebung grosser Schollen. Discusses vertical movements of the earth's crust following orogenic folding and illustrates by geological and gravimetrical studies in the Black Sea region.