Chitosan (CS) is well-known for its biological properties, especially its ability to induce tissue cicatrization. However, considerable research proved that CS presents a high inflammatory response and poor mechanical properties. For these reasons, we decided to use chitosan (CS) functionalized GO by a covalent bond (CS-GO).
View Article and Find Full Text PDFGraphene oxide (GO) has recently gained attention as a scaffold reinforcing agent for tissue engineering. Biomechanical and biological properties through a synergistic effect can be strengthened when combined with other materials such as chitosan (CS). For that reason, chitosan was used for Graphene Oxide (GO) functionalization through an amide group whose formation was evident by bands around 1600 cm in the FTIR analysis.
View Article and Find Full Text PDFIn the last few years, graphene oxide (GO) has gained considerable importance in scaffold preparation for tissue engineering due to the presence of functional groups that allow the interaction between the extracellular matrix and the components of the cellular membrane. The interaction between GO and chitosan (CS) can not only improve the biomechanical properties of the scaffold but also generate a synergistic effect, facilitating tissue recovery. studies on GO are scarce; therefore, biocompatibility tests on CS-GO scaffolds and bone regeneration experiments on critical size defects were carried out on rats.
View Article and Find Full Text PDFToday, tissue regeneration is one of the greatest challenges in the field of medicine, since it represents hope after accidents or illnesses. Tissue engineering is the science based on improving or restoring tissues and organs. In this work, five formulations of chitosan/poly(vinyl alcohol)/graphene oxide (CS/PVA/GO) nanocomposites were studied for the development of biodegradable films with potential biomedical applications.
View Article and Find Full Text PDFSeveral biomaterials, including natural polymers, are used to increase cellular interactions as an effective way to treat bone injuries. Chitosan (CS) is one of the most studied biocompatible natural polymers. Graphene oxide (GO) is a carbon-based nanomaterial capable of imparting desired properties to the scaffolds.
View Article and Find Full Text PDFIn this work, we synthesized chitosan grafted-polyacrylic acid (CS--PA) through surface-initiated atom transfer radical polymerization (SI-ATRP). We also studied the adsorption process of copper and lead ions onto the CS--PA surface. Adsorption equilibrium studies indicated that pH 4.
View Article and Find Full Text PDFIn the title compound, CHNO, the dihedral angle between the aromatic rings is 7.28 (7)° and the almost planar conformation of the mol-ecule is supported by an intra-molecular O-H⋯O hydrogen bond, which closes an (6) ring. In the crystal, weak C-H⋯O hydrogen bonds and aromatic π-π stacking link the mol-ecules into a three-dimensional network.
View Article and Find Full Text PDFActa Crystallogr Sect E Struct Rep Online
July 2012
The title compound, C(12)H(10)BrN(3), is essentially planar (r.m.s.
View Article and Find Full Text PDFActa Crystallogr Sect E Struct Rep Online
September 2011
In the title mol-ecule, C(11)H(14)BrNO(2), there is twist between the mean plane of the amide group and the benzene ring [the C-N-C-C torsion angle is -172.1 (2)°]. The amide H atom forms an intra-molecular hydrogen bond with the Br atom.
View Article and Find Full Text PDFActa Crystallogr Sect E Struct Rep Online
October 2011
In the title mol-ecule, C(10)H(11)BrClNO, there is a twist between the mean plane of the amide group and the benzene ring [C(=O)-N-C-C torsion angle = -27.1 (3)°]. In the crystal, inter-molecular N-H⋯O and weak C-H⋯O hydrogen bonds link the mol-ecules into chains along [010].
View Article and Find Full Text PDFIn the title mol-ecule, C(11)H(14)BrNO, there is twist between the mean plane of the amide group and the benzene ring [C(=O)-N-C C torsion angle = -31.2 (5)°]. In the crystal, inter-molecular N-H⋯O and weak C-H⋯O hydrogen bonds link mol-ecules into chains along [100].
View Article and Find Full Text PDFActa Crystallogr Sect E Struct Rep Online
February 2011
The title compound, C(10)H(11)BrN(2)O(3), exhibits a small twist between the amide residue and benzene ring [the C-N-C-C torsion angle = 12.7 (4)°]. The crystal structure is stabilized by weak N-H⋯O, C-H⋯Br and C-H⋯O inter-actions.
View Article and Find Full Text PDFThe molecules of the title compound, C(34)H(24)N(2)S(4), lie across centres of inversion in the space group P2(1)/n. The spacer unit linking the benzene rings and carbazole units is effectively planar, while the carbazole unit itself is slightly folded. Molecules are linked into sheets by a single C-H···π(arene) hydrogen bond and the hydrogen-bonded sheets are themselves linked into a three-dimensional framework structure by a single π-π stacking interaction.
View Article and Find Full Text PDFIn the title compound, C(17)H(32)O(2)S(3), the dodecyl chain and the trithiocarbonate unit adopt a nearly planar all-trans conformation, while the carboxyl group is synclinal to this chain direction. The molecules are linked by pairs of inversion-related O-H..
View Article and Find Full Text PDFActa Crystallogr Sect E Struct Rep Online
September 2010
The title compound, C(9)H(8)O(2)S(2), can be used as a chain transfer agent and may be used to control the behavior of polymerization reactions. O-H⋯O hydrogen bonds of moderate character link the mol-ecules into dimers. In the crystal, the dimers are linked into sheets by C-H⋯O inter-actions, forming R(4) (2)(12) and R(2) (2)(8) edge-fused rings running parallel to [101].
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