Search results for "macromolecules"
showing 8 items of 18 documents
NOVEL PROCESSES FOR THE MODIFICATION AND THE STERILIZATION OF MACROMOLECULAR MATRICES
Fullerene-containing Polymers
2012
In the present chapter, the different C60-based polymers have been classified according to structural parameters and the different synthetic strategies to prepare them have been highlighted. Two new families have been added, namely fullerene–nanotubes hybrid and DNA–fullerene hybrid, due to the nondiscrete nature of the corresponding members. Finally, fullerene-containing polymers’ most promising applications have been discussed, mainly focusing on nonlinear optics, DNA-cleaving and photovoltaic properties.
Correction: Mechanical properties of provisional dental materials: A systematic review and meta-analysis.
2018
Provisional restorations represent an important phase during the rehabilitation process, knowledge of the mechanical properties of the available materials allows us to predict their clinical performance. At present, there is no systematic review, which supports the clinicians’ criteria, in the selection of a specific material over another for a particular clinical situation. The purpose of this systematic review and meta-analysis was to assess and compare the mechanical properties of dimethacrylates and monomethacrylates used in fabricating direct provisional restorations, in terms of flexural strength, fracture toughness and hardness. This review followed the PRISMA guidelines. The searche…
Medical biochemistry: cell signaling and bioenergetics.
2022
El document forma part dels materials docents programats mitjançant l'ajut del Servei de Política Lingüística de la Universitat de València El documento resume aspectos importantes de la las propiedades y la jerarquía de las macromoléculas. Por otro lado, incorpora aspectos importantes del temario de los bloques de bioenergética y señalización celular de la asignatura de Bioquímica para estudiantes de primero de Medicina. The document summarizes important aspects of the properties and hierarchy of macromolecules. It also contains important material regarding the bioenergetics and cellular signaling of the course of Biochemistry for the students of the first year of the Grade in Medicine.
Fullerene-Containing Polymers: An Overview
2009
The shell matrix of the freshwater mussel Unio pictorum (Paleoheterodonta, Unionoida). Involvement of acidic polysaccharides from glycoproteins in na…
2007
13 pages; International audience; Among molluscs, the shell biomineralization process is controlled by a set of extracellular macromolecular components secreted by the calcifying mantle. In spite of several studies, these components are mainly known in bivalves from only few members of pteriomorph groups. In the present case, we investigated the biochemical properties of the aragonitic shell of the freshwater bivalve Unio pictorum (Paleoheterodonta, Unionoida). Analysis of the amino acid composition reveals a high amount of glycine, aspartate and alanine in the acid-soluble extract, whereas the acid-insoluble one is rich in alanine and glycine. Monosaccharidic analysis indicates that the in…
Blends of Semiflexible Polymers: Interplay of Nematic Order and Phase Separation
2021
Mixtures of semiflexible polymers with a mismatch in either their persistence lengths or their contour lengths are studied by Density Functional Theory and Molecular Dynamics simulation. Considering lyotropic solutions under good solvent conditions, the mole fraction and pressure is systematically varied for several cases of bending stiffness κ (the normalized persistence length) and chain length N. For binary mixtures with different chain length (i.e., NA=16, NB=32 or 64) but the same stiffness, isotropic-nematic phase coexistence is studied. For mixtures with the same chain length (N=32) and large stiffness disparity (κB/κA=4.9 to 8), both isotropic-nematic and nematic-nematic unmixing oc…
Incidence de la clarification des moûts de raisin sur les fermentescibilltés alcoolique et malolactique
1993
<p style="text-align: justify;">Des essais de débourbage en vinification en blanc, réalisés de 1988 à 1992, mettent en évidence le rôle important joué par la teneur en macromolécules solubles dans le moût de raisin. Les moûts de faible turbidité conduisent en effet à des fermentations alcooliques lentes en relation avec de faibles populations levuriennes. Il est également confirmé que la libération de polysaccharides exocellulaires par les levures au cours de la fermentation alcoolique est d'autant plus élevée que le moût de départ a été fortement appauvri en colloïdes de raisin. Par contre, ce sont dans les lots les plus clarifiés que l'on observe la meilleure fermentescibilité malol…