Food science at South Bank University

Chaplin, Martin F.; Coultate, Tom

doi:10.1108/00346659710179697

Cited by 12 publications

(18 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The g-CD structure was taken from Martin Chaplin web page from London South Bank University (Chaplin, 2008). The ionized structure of (þ)-UA according to Table 2 has been drawn and presented to the g-CD molecule.…”

Section: Molecular Modelingmentioning

confidence: 99%

Elucidation of the complexation mechanism between (+)‐usnic acid and cyclodextrins studied by isothermal titration calorimetry and phase‐solubility diagram experiments

Segura‐Sánchez¹,

Bouchemal²,

Lebas³

et al. 2009

J of Molecular Recognition

View full text Add to dashboard Cite

In the present work the complexation mechanism between (+)-usnic acid (UA) and cyclodextrins (CDs) has been investigated by isothermal titration calorimetry (ITC) and phase-solubility diagrams using pH as a tool for modifying the molecule ionization. ITC experiments have been employed to evaluate the stoichiometry of interaction (N), affinity constants (K), and thermodynamic parameter variation associated with complexation between (+)-UA and alpha-, beta-, HP-beta-, SBE-beta-, and gamma-CD. It was shown that (+)-UA did not interact with alpha-CD and tended to interact more favorably with gamma-CD (K = 1030 M(-1), DeltaG = -17.18 kJ x mol(-1)) than beta-CD (K = 153 M(-1), DeltaG = -12.46 kJ x mol(-1)) forming 1:1 complexes. It was also demonstrated using ITC and solubilization experiments that chemical modifications of the parent beta-CD resulted in stronger and more spontaneous interactions (K = 281 M(-1), DeltaG = -13.97 kJ x mol(-1) for SBE-beta-CD and K = 405 M(-1), DeltaG = -14.87 kJ x mol(-1) for HP-beta-CD). Analysis of the thermodynamic data suggested that van der Waals forces and hydrogen bonds were responsible for the formation of complexes with a predominance of van der Waals forces. Finally, pH induced modifications of (+)-UA ionization provided important informations relative to the topology of the interaction between (+)-UA molecule and the gamma-CD cavity, which were confirmed by molecular modeling.

show abstract

Section: Molecular Modelingmentioning

confidence: 99%

Elucidation of the complexation mechanism between (+)‐usnic acid and cyclodextrins studied by isothermal titration calorimetry and phase‐solubility diagram experiments

Segura‐Sánchez¹,

Bouchemal²,

Lebas³

et al. 2009

J of Molecular Recognition

View full text Add to dashboard Cite

show abstract

“…The role of water and its anomalous properties in the chemistry of life have intrigued generations of scientists and the behaviour of water constitutes an open task up to now [ 1 , 2 ]. Water is not just a solvent but it actively engages and interacts with biomolecules at nanoscale level in complex and essential ways for establishment and maintenance of life.…”

Section: Introductionmentioning

confidence: 99%

Exploring the behaviour of water in glycerol solutions by using delayed luminescence

et al. 2018

View full text Add to dashboard Cite

The crucial role of water in the engine of life have encouraged many researchers in studying, both theoretically and experimentally, the possible “structure” of water. Many properties of water have been related to the interplay between two distinct and interconverting structural species, namely the low-density water (LDW) and the high-density water (HDW). Supported by the results obtained with other aqueous solutions, this paper deals with the possibility of using the ultra-weak delayed luminescence (DL) to investigate water structuring in a mixture with glycerol, characterized only by hydrogen bonds between the various molecules. Spectral and temporal characteristics of DL decays give information on the two components of the mixture, by evidencing the contribution of water at glycerol concentrations close to the values used in cryopreservation. DL results have shown a correlation with LDW clusters size as determined by other researchers on the basis of neutron diffraction experiments and computational modelling, as reported in Literature.

show abstract

“…In microwave heating, the microwave's electric field polarises the dipole molecules contained in the material . Depending on the frequency, the dipole molecules may rotate in continuous alignment with the electric field.…”

Section: Introductionmentioning

confidence: 99%

“…Depending on the frequency, the dipole molecules may rotate in continuous alignment with the electric field. If the dipoles lag behind the electric field, then interactions between the dipole and the electric field lead to energy loss within the material as the material heats . The quantity of energy lost over time depends on the phase difference between the applied electric field and the dipole moment of the molecules as well as the mobility of the electron clouds within the molecules present in the material.…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling of microwave heating of frozen wood

et al. 2013

View full text Add to dashboard Cite

The heating process of frozen wood exposed to plane microwaves is numerically investigated. The nonlinear heat conduction problem involving phase change such as wood freezing is solved by a specific 3D volumetric enthalpy‐based finite element method. Dielectric and thermal properties are a function of temperature and moisture content. The numerical model is validated by experimental and analytical means. As an application, we studied the effect of moisture content and frequency on microwave heating of trembling aspen wood.

show abstract

Food science at South Bank University

Abstract: Focuses on teaching and research in the field of food science and technology at South Bank University, featuring the content of courses at both undergraduate and postgraduate level as well as the areas of food science research.

Cited by 12 publications

References 0 publications

Elucidation of the complexation mechanism between (+)‐usnic acid and cyclodextrins studied by isothermal titration calorimetry and phase‐solubility diagram experiments

Elucidation of the complexation mechanism between (+)‐usnic acid and cyclodextrins studied by isothermal titration calorimetry and phase‐solubility diagram experiments

Exploring the behaviour of water in glycerol solutions by using delayed luminescence

Numerical modelling of microwave heating of frozen wood

Contact Info

Product

Resources

About