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Chitosan Functionalization: Covalent and Non-Covalent Interactions and Their Characterization

Polymers, 2021
Chitosan (CS) is a natural biopolymer that has gained great interest in many research fields due to its promising biocompatibility, biodegradability, and favorable mechanical properties. The versatility of this low-cost polymer allows for a variety of chemical modifications via covalent conjugation and non-covalent interactions, which are designed to ...
Sandrine Gerber-Lemaire, Laura Nicolle, Céline M A Journot   +2 more
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Non-covalent interactions in biomacromolecules

Physical Chemistry Chemical Physics, 2007
Non-covalent interactions play an important role in chemistry, physics and especially in biodisciplines. They determine the structure of biomacromolecules such as DNA and proteins and are responsible for the molecular recognition process. Theoretical evaluation of interaction energies is difficult; however, perturbation as well as variation ...
Jirí, Cerný, Pavel, Hobza
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Covalent interactions in oxides

Journal of Electron Spectroscopy and Related Phenomena, 2014
Abstract The covalent character of ionic metal compounds, in particular oxides, may lead to substantial departures from nominal oxidation states. Since this covalent character changes the effective charge of the cation, it contributes to the chemical and physical properties of these compounds.
Paul S. Bagus, Connie J. Nelin
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Non‐Covalent Interactions in Polysaccharide Systems

Macromolecular Bioscience, 2006
AbstractSummary:This paper describes the behavior of some polysaccharides with well‐known chemical structures and in which the influence of cooperative secondary interactions play an important role. The roles played by hydrophobic and ionic interactions (including ionic selectivity) on polysaccharide conformation and gelation are discussed ...
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Interatomic interactions in covalent and ionic solids

Physical Review B, 1990
The total energy in tight-binding theory is obtained to second order in the ratio of the width of the bonding band to the bonding-antibonding splitting. This is the reciprocal of the expansion parameter appropriate to metals. No other important approximation on the minimal-basis, nearest-neighbor, tight-binding Hamiltonian is required for the periodic ...
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Non Covalent Interactions In Protein Complexes

2007
While the electrostatic interactions between the complementary charged proteins increase their interaction, desolvation of the charged and polar amino acid residues destabilizes the protein - protein complex. We studied influence of the electrostatic interactions on formation of the protein complexes between Ras and Rap and their effectors Raf and ...
Tomić, Sanja, Bertoša, Branimir, Wade, Rebecca   +2 more
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Regulation by Non-Covalent Interactions

2009
The regulation of enzymatic activity through non-covalent interactions allows the cell to react quickly and in a reversible manner.
Jeannine Yon-Kahn, Guy Hervé
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Ionic-covalent collision interactions

International Journal of Quantum Chemistry, 2009
Several classes of collision problems are mediated by interactions between ionic and covalent potential energy curves. Two prominent cases are ion-ion recombination, A+ + B− A + B, and electron capture in multiply charged ion, atom collisions, Aq+ + B A(q – 1)+ + B+.
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