Search Results - "Quina, F H"

Effect of a Variety of Organic Additives on Retention and Efficiency in Micellar Liquid Chromatography by López-Grío, S, García-Alvarez-Coque, M. C, Hinze, W. L, Quina, F. H, Berthod, A

“…The effect of 21 organic additives (alkanols, alkane diols, dipolar aprotic solvents, alkanes) on the chromatographic behavior (retention, elution strength,…”
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Effect of cholesterol content on the structural and dynamic membrane properties of DMPC/DSPC large unilamellar bilayers by Soto-Arriaza, M.A., Olivares-Ortega, C., Quina, F.H., Aguilar, L.F., Sotomayor, C.P.

“…In this study, we report the effect of cholesterol content on the dynamic and structural properties of a dimyristoyl-phosphatidylcholine and…”
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Surfactant-Mediated Cloud Point Extractions:  An Environmentally Benign Alternative Separation Approach by Quina, Frank H, Hinze, Willie L

“…Aqueous solutions of certain surfactant micelles exhibit phase separation behavior upon temperature alteration. This phenomenon can be exploited in separation…”
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Covalently Bound Ionene Polyelectrolyte-Silica Gel Stationary Phases for HPLC by Suzuki, Yasuzo, Quina, Frank H, Berthod, Alain, Williams, Ronald W, Culha, Mustafa, Mohammadzai, Imdad Ullah, Hinze, Willie L

“…Micelle-mimetic ionene-based stationary phases for high-performance liquid chromatography (HPLC) are prepared by attaching [3,16]- and [3,22]-ionenes to…”
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Treatment of Saline Wastewater Contaminated with Hydrocarbons by the Photo-Fenton Process by Moraes, José Ermírio F, Quina, Frank H, Nascimento, Cláudio Augusto O, Silva, Douglas N, Chiavone-Filho, Osvaldo

“…The application of the photo-Fenton process to the treatment of saline wastewater contaminated with hydrocarbons is investigated. Aqueous saline solutions…”
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Utilization of Solar Energy in the Photodegradation of Gasoline in Water and of Oil-Field-Produced Water by Moraes, José Ermírio F, Silva, Douglas N, Quina, Frank H, Chiavone-Filho, Osvaldo, Nascimento, Cláudio Augusto O

“…The photo-Fenton process utilizes ferrous ions (Fe2+), hydrogen peroxide (H2O2), and ultraviolet (UV) irradiation as a source of hydroxyl radicals for the…”
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Ruthenium(II) tris(bipyridyl) ion as a luminescent probe for oxygen uptake by Sasso, M G, Quina, F H, Bechara, E J

“…The present work describes an alternative technique for following the rate of oxygen uptake by chemical and enzymatic systems. This method is based on…”
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Ion exchange in micellar solutions. 2. Binding of hydroxide ion to positive micelles by Chaimovich, H, Bonilha, J. B. S, Politi, M. J, Quina, F. H

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Dynamics of Counterion Exchange in Aqueous Micellar Solution: Salt Effects on the Counterion Exit Rate by Alonso, Elena O, Quina, Frank H

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Characterization of crude petroleum by NIR by Falla, F.S., Larini, C., Le Roux, G.A.C., Quina, F.H., Moro, L.F.L., Nascimento, C.A.O.

“…Petroleum is a product whose composition (quality) varies due to its natural origin and to transport and storage conditions. In Brazil in particular, crude…”
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Does the Photochemical Conversion of Colchicine into Lumicolchicines Involve Triplet Transients? A Solvent Dependence Study by Nery, Ana L. P., Quina, Frank H., Moreira, Jr, Paulo F., Medeiros, Carlos E. R., Baader, Wilhelm J., Shimizu, Karina, Catalani, Luiz H., Bechara, Etelvino J. H.

“…β- and γ-lumicolchicines are photoproducts formed by the cycloisomerization of the tropolone ring of colchicine (COL) alkaloids. The mechanism of the…”
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Photophysics of ambident organic anions I by Berci-Filho, Pedro, Quina, F.H., Gehlen, M.H., Politi, M.J., Neumann, M.G., Barros, T.C.

“…The absorption and emission properties of saccharin, phthalimide, isatin and their anions were determined and analyzed. The conjugate bases of phthalimide and…”
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Analytical Applications and Implications of Intramolecular Micelle-Mimetic Ionene Aggregates by Hinze, Willie L, Moreno, Bernardo, Quina, Frank H, Suzuki, Yasuzo, Wang, Hong

“…The synthesis and relevant properties of some cationic polyelectrolytes of the [x,y]-ionene type (i.e., molecules consisting of dimethylammonium charge centers…”
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Time-Resolved Techniques in Photochemistry, Photophysics and Photobiology Introduction by Quina, Frank H., Weiss, Richard G.

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Photochemistry of organic chromophores incorporated into fatty acid monolayers by Whitten, D. G., Hopf, F. R., Quina, F. H., Sprintschnik, G., Sprintschnik, H. W.

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Investigation of the retention mechanism in nonionic micellar liquid chromatography using an alkylbenzene homologous series by Borgerding, Michael F, Quina, Frank H, Hinze, Willie L, Bowermaster, Jeff, McNair, Harold M

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Counterion Exchange Selectivity in Detergent–Polymer Aggregates by Nassar, Patricia M., Naal, Rose M.Z.Georgetto, de Pauli, Silvia H., Bonilha, João B.S., Okano, Laura T., Quina, Frank H.

“…In aqueous solution, the interaction between sodium dodecyl sulfate (SDS) and poly(ethylene glycol) (PEG) results in the formation of small aggregates or…”
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Stöber Synthesis of Monodispersed Luminescent Silica Nanoparticles for Bioanalytical Assays by Rossi, Liane M, Shi, Lifang, Quina, Frank H, Rosenzweig, Zeev

“…We have developed a simple method to prepare bright and photostable luminescent silica nanoparticles of different sizes and narrow size distribution in high…”
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Photophysical and electrochemical properties of π-extended molecular 2,1,3-benzothiadiazoles by DaSilveira Neto, Brenno A., Lopes, Aline Sant'Ana, Ebeling, Gunter, Gonçalves, Reinaldo S., Costa, Valentim E.U., Quina, Frank H., Dupont, Jairton

“…The reaction of 4,7-dibromo-2,1,3-benzothiadiazole with arylboronic acids (phenyl, 1-naphthyl, 4-methoxyphenyl, 4-chlorophenyl and 4-trifluoromethylphenyl) in…”
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Carcinogenic and non-carcinogenic aromatic hydrocarbons in lipid membranes. A fluorescence study of pyrene and benzo[a]pyrene by Sanioto, D L, Quina, F H, Schreier, S

“…1. The fluorescence behavior of a non-carcinogenic (pyrene) and a carcinogenic (benzo[a]pyrene) aromatic hydrocarbon was examined in the presence of a…”
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