Vittorio Elia

artykuł

DNA and the chiral water superstructure

Vittorio Elia, Tamar A. Yinnon, Rosario Oliva, Elena Napoli, więcej

Journal of Molecular Liquids > 2017 > 248 > C > 1028-1029

A few months after the publication of our paper Chiral micron-sized H₂O aggregates in water: Circular dichroism of supramolecular H₂O architectures created by perturbing pure water, WATER, 8, 1–29 (2017) submitted on June 6, 2016 and published on March 2, 2017, the paper DNA's Chiral Spine of Hydration by M. L. McDermott, H. Vanselous, S. A. Corcelli, and P. B. Petersen, was published in ACS Central...

artykuł

Experimental evidence of stable water nanostructures in extremely dilute solutions, at standard pressure and temperature

Vittorio Elia, Giovanni Ausanio, Francesco Gentile, Roberto Germano, więcej

Homeopathy > 2014 > 103 > 1 > 44-50

This paper presents the results of several experimental methods (FT-IR spectroscopy, UV–vis spectroscopy, fluorescence microscopy (FM), Atomic Force Microscopy (AFM)) evidencing structural changes induced in extremely diluted solutions (EDS), which are prepared by an iterated process of centesimal (1:100) dilution and succussion (shaking). The iteration is repeated until an extremely high dilution...

artykuł

Calorimetric, conductometric and density measurements of iteratively filtered water using 450, 200, 100 and 25 nm Millipore filters

Vittorio Elia, Nadia Marchettini, Elena Napoli, Marcella Niccoli

Journal of Thermal Analysis and Calorimetry > 2013 > 114 > 2 > 927-936

This study presents some experimental results on the variation of the physico-chemical properties of pure MilliQ water, when subjected to a procedure of iterated filtration through Millipore filters with porosity ranging from 450 to 25 nm. The parameters measured were: calorimetry, electrical conductivity, density, and pH. Release of chemical impurities can be ruled out due to the nature of the materials...

artykuł

Study of the Effects of Cosolvents on the Complexation of β-Cyclodextrin with Alkanols by Calorimetry at 298 K

Giuseppina Castronuovo, Vittorio Elia, Marcella Niccoli, Filomena Velleca

Journal of Inclusion Phenomena and Macrocyclic Chemistry > 2003 > 45 > 1-2 > 89-95

The formation of complexes between β-cyclodextrin and 1-alkanols hasbeen studied calorimetrically at 298 K in water and in concentrated aqueoussolutions of ethanol or urea. When a complex is formed, calorimetry enables thecalculation of both the enthalpy and the association constant, from which thefree energy and the entropy of the process can be obtained. The effects ofethanol and urea on the hydration...

artykuł

Calorimetric studies of hydrophobic interactions of alkanols in concentrated aqueous solutions of glucose - Implications for the mechanism of protein stabilization by sugars

Giuseppina Castronuovo, Vittorio Elia, Marcella Niccoli, Filomena Velleca

Thermochimica Acta > 2002 > 389 > 1-2 > 1-9

Calorimetric measurements were carried out at 298K on concentrated aqueous solutions of glucose, ranging from 0 to 5molkg ^- ¹ , containing alkan-1-ols, alkane-1,2-diols and alkane-α,ω-diols from C ₂ to C ₇ . The purpose of this study is to obtain more information about the influence of glucose on hydrophobic hydration and interactions. The pair-wise interaction coefficients...

artykuł

The Effects of Cosolvents on the Complexation of α-Cyclodextrin with Alkylated Substances. Calorimetric Studies at 25 °C

Giuseppina Castronuovo, Vittorio Elia, Marcella Niccoli, Filomena Velleca

Journal of Inclusion Phenomena and Macrocyclic Chemistry > 2002 > 44 > 1-4 > 229-234

The formation of complexes of α-cyclodextrin with 1,2-alkanediols, α,ω-alkanediols and some cycloalkanols has been studied calorimetrically at 25 °C in water, in 7 mol kg^-1 aqueous urea and in 3 mol kg^-1 aqueous glucose. When a complex is formed, calorimetry enables the calculation of both the enthalpy and the association constant, from which the free energy and the entropy of the process can be obtained...

artykuł

Efficiency of hydroxyl groups in promoting hydrophobic interactions. A calorimetric study of ternary aqueous solutions of alkan-1-ols and alkane-m,n-diols

Giuseppina Castronuovo, Vittorio Elia, Silvia Perez-Casas, Filomena Velleca

Journal of Molecular Liquids > 2000 > 88 > 2-3 > 163-173

Heats of dilution of ternary aqueous solutions containing alkan-1-ols and alkane-1,2-diols or alkane-α,ω-diols have been determined at 298.15 K by flow microcalorimetry. The pairwise interaction coefficients of the virial expansion of the excess enthalpies were evaluated and compared to those formerly obtained for binary aqueous solutions of alkan-m-ols or alkane-m,n-diols. The results were interpreted...

artykuł

Factors determining the formation of complexes between α-cyclodextrin and alkylated substances in aqueous solutions: a calorimetric study at 25 ^o C

Giuseppina Castronuovo, Vittorio Elia, Assunta Iannone, Marcella Niccoli, więcej

Carbohydrate Research > 2000 > 325 > 4 > 278 - 286

The formation of complexes of α-cyclodextrin with cycloalkanediols, monoalkylamines and 1-alkanols has been studied calorimetrically at 25 ^o C in water, in phosphoric acid, pH 1.3, and in phosphate buffer, pH 5.5, respectively. When a complex is formed, calorimetry enables the calculation of both the enthalpy and the association constant, from which the free energy and the entropy of the process...

artykuł

Thermodynamics of the interaction of α-cyclodextrin with α,ω-dicarboxylic acids in aqueous solutions. A calorimetric study at 25°C

Giuseppina Castronuovo, Vittorio Elia, Filomena Velleca, Giuseppe Viscardi

Thermochimica Acta > 1997 > 292 > 1-2 > 31-37

The interaction in water of α-cyclodextrin with α,ω-dicarboxylic acids from C ₅ to C ₁ ₁ has been studied calorimetrically at 25°C in phosphate buffer at pH 11.3 and 1.3. When a complex forms, calorimetry enables the calculation of both enthalpy and association constant, from which the free energy and the entropy of the process can be obtained.At pH 11.3, 1 : 1 complexes are formed,...

artykuł

Hydrophilic groups determine preferential configurations in aqueous solutions. A calorimetric study of monocarboxylic acids and monoalkylamines at 298.15 K

Giuseppina Castronuovo, Vittorio Elia, Filomena Velleca

Thermochimica Acta > 1997 > 291 > 1-2 > 21-26

Enthalpies of dilution of binary aqueous solutions containing monocarboxylic acids and monoalkylamines have been determined by microcalorimetry at 298.15 K. Pairwise self-interaction coefficients of the virial expansion of the excess enthalpies were evaluated and compared with those obtained for alkan-1-ols. The values of the coefficients are positive and increase differently with increasing number...

artykuł

Thermodynamics of the interaction of α-cyclodextrin with monocarboxylic acids in aqueous solutions: a calorimetric study at 25 °C

Giuseppina Castronuovo, Vittorio Elia, Dimitrios Fessas, Filomena Velleca, więcej

Carbohydrate Research > 1996 > 287 > 2 > 127-138

The interaction in water of cyclomaltohexaose (α-cyclodextrin) with monocarboxylic acids from C ₃ to C ₁ ₂ has been studied calorimetrically at 25 °C in phosphate buffer, pH 11.3. When a complex forms, calorimetry enables the calculation of both the enthalpy and the association constant, from which the free energy and the entropy of the process can be obtained. For these acids,...

artykuł

A model for the interaction between hydrophilic and hydrophobic solutes. A calorimetric study of the aqueous solutions containing alkylureas and urea at 298.15 K.

Giuseppina Castronuovo, Vittorio Elia, Filomena Velleca

Journal of Molecular Liquids > 1996 > 68 > 1 > 55-64

The heats of dilution of ternary aqueous solutions of urea and alkylureas and of ternary aqueous solution of mono, di and tetra alkylureas have been determined calorimetrically at 298.15 K. Pairwise cross interaction coefficients of the virial expansion of the excess enthalpies were determined. The behaviour of these systems was interpreted in terms of preferential interactions between hydrophilic...

artykuł

Thermodynamics of the interaction of cyclodextrins with aromatic and α, ω-amino acids in aqueous solutions: a calorimetric study at 25°C

Giuseppina Castronuovo, Vittorio Elia, Dimitrios Fessas, Antonio Giordano, więcej

Carbohydrate Research > 1995 > 272 > 1 > 31-39

The interaction in water of α- and β-cyclodextrins with l-phenylalanine, l-tyrosine, l-tryptophan, and l-histidine has been studied calorimetrically at 25°C in pure water and in a phosphate buffer (pH 11.3). The interaction in water of α-cyclodextrin with some α, ω-amino acids was also studied. When a complex forms, calorimetry allows the calculation of both the enthalpy and the association constant,...

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Wyniki wyszukiwania dla: Vittorio Elia

DNA and the chiral water superstructure

Experimental evidence of stable water nanostructures in extremely dilute solutions, at standard pressure and temperature

Calorimetric, conductometric and density measurements of iteratively filtered water using 450, 200, 100 and 25 nm Millipore filters

Study of the Effects of Cosolvents on the Complexation of β-Cyclodextrin with Alkanols by Calorimetry at 298 K

Calorimetric studies of hydrophobic interactions of alkanols in concentrated aqueous solutions of glucose - Implications for the mechanism of protein stabilization by sugars

The Effects of Cosolvents on the Complexation of α-Cyclodextrin with Alkylated Substances. Calorimetric Studies at 25 °C

Efficiency of hydroxyl groups in promoting hydrophobic interactions. A calorimetric study of ternary aqueous solutions of alkan-1-ols and alkane-m,n-diols

Factors determining the formation of complexes between α-cyclodextrin and alkylated substances in aqueous solutions: a calorimetric study at 25 ^o C

Thermodynamics of the interaction of α-cyclodextrin with α,ω-dicarboxylic acids in aqueous solutions. A calorimetric study at 25°C

Hydrophilic groups determine preferential configurations in aqueous solutions. A calorimetric study of monocarboxylic acids and monoalkylamines at 298.15 K

Thermodynamics of the interaction of α-cyclodextrin with monocarboxylic acids in aqueous solutions: a calorimetric study at 25 °C

A model for the interaction between hydrophilic and hydrophobic solutes. A calorimetric study of the aqueous solutions containing alkylureas and urea at 298.15 K.

Thermodynamics of the interaction of cyclodextrins with aromatic and α, ω-amino acids in aqueous solutions: a calorimetric study at 25°C

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