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Academic literature on the topic 'Gomme d'Acacia'
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Journal articles on the topic "Gomme d'Acacia"
Palou Madi, Oumarou, Régis Peltier, Oumarou Balarabe, Mama Ntoupka, and Nicole Sibelet. "Abandon ou extension des plantations d'acacias au Nord-Cameroun : tout dépendra du fonctionnement des filières gomme arabique." BOIS & FORETS DES TROPIQUES 306, no. 306(4) (December 1, 2010): 57. http://dx.doi.org/10.19182/bft2010.306.a20432.
Full textHarmand, Jean-Michel, Mama Ntoupka, Bertrand Mathieu, Clément Forkong Njiti, Jean-Marie Tapsou, Jean-Christophe Bois, Philippe Thaler, and Régis Peltier. "Production de gomme arabique en plantations d'acacia senegal en zone soudanienne du Cameroun : Effet du climat, du sol, de la date d'incision et de la provenance des arbres." BOIS & FORETS DES TROPIQUES 311, no. 311 (March 1, 2012): 21. http://dx.doi.org/10.19182/bft2012.311.a20507.
Full textJacques, Dominique, Guibien Cléophas Zerbo, Pierre Soloviev, and Djingdia Lompo. "Acacia senegal au Burkina Faso : stratégie d'amélioration génétique." BOIS & FORETS DES TROPIQUES 304, no. 304 (June 1, 2010): 35. http://dx.doi.org/10.19182/bft2010.304.a20445.
Full textZerbo, Guibien Cléophas, Pierre Soloviev, Dominique Jacques, Djingdia Lompo, and Adeline Gillet. "Aptitude au greffage du gommier Acacia senegal au Burkina Faso." BOIS & FORETS DES TROPIQUES 312, no. 312 (June 1, 2012): 53. http://dx.doi.org/10.19182/bft2012.312.a20503.
Full textTHEVENET, Francis. "Gomme d'acacia, hydrocolloïde multifonctionnel et nutritionnel." Agroalimentaire, February 2009. http://dx.doi.org/10.51257/a-v1-f4350.
Full textDissertations / Theses on the topic "Gomme d'Acacia"
Adam, Aurélie. "Auto-assemblage de la gomme d'acacia modifiée par voie enzymatique." Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0306.
Full textThe appearance of order from disorder has always fascinated us, especially self-assemblies. Indeed, they allow the spontaneous formation of particles in suspension (colloidal particles) without any energy input. Most studies to induce self-assembly are based on chemical techniques, often using organic solvents or toxic compounds.The originality of the Biomolecular Engineering Laboratory (LIBio) lies in the formulation of innovative vectors whose constituents are derived from renewable agro-resources. One of the research axes of the laboratory is thus focused on the modification of natural polysaccharides in order to bring them new functional properties. Here, in order to move towards a greener chemistry, the original approach of functionalization by enzymatic way of polysaccharides developed at LIBio is implemented to modify the Acacia gum in order to confer self-assembly properties. This modification is based on the use of an enzyme allowing the oxidation of phenolic compounds. The oxidation products then formed ester bonds with Acacia gum to modify the arabinogalactan peptide and arabinogalactan protein fractions. The oxidation products being hydrophobic modified the behavior of the gum by making it less hydrophilic and less hygroscopic. Thus in aqueous medium, at concentrations where the native Acacia gum is soluble, the modified Acacia gum forms monodisperse spherical particles. It is then necessary to determine which method is the most suitable to define the critical aggregation concentration of these assemblies. In particular, a new technique has been used: micro-scale thermophoresis. In the last part of this work it is a question of studying the influence of physicochemical parameters on the assembly. Indeed, the assemblies are formed thanks to the weak links between the sub-units of modified Acacia gum. These interactions depend on parameters such as ionic strength, pH or temperature
Akil, Suzanna. "Etude du mécanisme de coacervation complexe entre les fractions principales de la gomme d'Acacia et la [beta]-lactoglobuline - Comparaison avec la gomme d'Acacia non fractionnée." Thesis, Vandoeuvre-les-Nancy, INPL, 2007. http://www.theses.fr/2007INPL020N/document.
Full textThe complex coacervation mechanism, an associative phase separation mainly induced by electrostatic interactions, between ?-lactoglobulin (BLG, animal protein) and Acacia gum (AG, vegetal polysaccharide) was studied in this work. The most significant difficulty to understand complex coacervation between BLG and AG at the molecular level is the molecular weight polydispersity of AG. From there, the main motivation of this research was to better understand and control the interactions between BLG and the major molecular fractions of AG, FI (~88% of AG) and FII (~10% of AG) using isothermal titration calorimetry, static and dynamic light scattering, electrophoretic mobility, Granulo-Polarimetry and optical microscopy. Higher energy of interaction, lower stoichiometry of association and then favorable complexation were shown between BLG and FII in relation with higher accessibility and density of charges for FII. The major results of this study reveal then different roles of AG fractions in complex coacervation with BLG
Vandevelde, Margez Marie-Colette. "Contribution à l'étude physicochimique d'un polyélectrolyte naturel : la gomme arabique exsudat d'acacia Sénégal." Rouen, 1986. http://www.theses.fr/1986ROUES007.
Full textMejia, Tamayo Verónica. "Propriétés volumétriques des Arabinogalactan-protéines d'exsudats de gommes d'Acacia." Thesis, Montpellier, 2018. http://www.theses.fr/2018MONTG060/document.
Full textAcacia gum is the oldest and most widely known and used gum, it is a dried gummy exudate from the leaves and branches of the Acacia senegal and Acacia seyal trees. Acacia gums are weakly charged, amphiphilic hyperbranched arabinogalactan-proteins (AGPs). They are composed of about 90% polysaccharides and from 1-3% of proteins and minerals. In spite of the widely spread of industrial usage of A. gums, their volumetric properties (hydrostatic and hydrodynamic) have not been well studied. These properties have been linked to important properties such as flexibility and hydration of the molecule, which are related to important functional properties of A. gums (e. g. interfacial properties). The main objective of this PhD thesis was to study the volumetric properties of AGPs from Acacia gums exudates. For this effect, the main commercial species, A. senegal and A. seyal, and the macromolecular fractions of the former, obtained via hydrophobic interaction and ionic exchange chromatographies were studied. The main results showed that AGPs from Acacia gums have a semi-flexible structure. However, differences in their flexibility and hydration were seen among AGP fractions. These differences were explained based on their composition, polarity, molar mass, shape and conformation. Furthermore, an intermediate behavior between proteins and linear polysaccharides was evidenced. In addition, an effect of the presence of AGP based aggregates on the volumetric properties was seen
Vandevelde, Marie-Colette. "Contribution à l'étude physico-chimique d'un polyélectrolyte naturel la gomme arabique, exsudat d'acacia sénégal /." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37601710v.
Full textAphibanthammakit, Chutima. "Propriétés interfaciales et émulsifiantes de gomme d'Acacia senegal, Acacia seyal et de leurs fractions." Thesis, Montpellier, SupAgro, 2018. http://www.theses.fr/2018NSAM0029/document.
Full textAcacia gums (AG, E414 EC) are widely used for its stabilizing, emulsifying and film-forming properties. The aim of this project is to characterize the interfacial and emulsifying properties of Acacia gums. The main results from liquid-liquid interfacial properties study confirmed that A. senegal showed a faster decrease of interfacial tension and a more rapid interfacial film formation. These were in agreement to its greater content of high molar mass-protein AGPs content, the more accessibility of proteinaceous moieties, and the higher molecular flexibility compared to A. seyal. In the same vein, these biochemical and structural advantages of A. senegal were found to be involved in the emulsifying properties of gums. The results from an innovative approach aiming to control high molar mass protein-rich AGPs content in bulk and the total concentration of gum by mixing two well characterised fractions isolated from A. senegal confirmed the functional synergism between the amount of high molar mass protein-rich AGPs and the total gum concentration. Moreover, in the presence of high molar mass protein-rich AGPs in high amount, the emulsion became stable to flocculation/coalescence due to the great protein content allowing electrostatic repulsion between droplets and the high bulk apparent viscosity. These were in agreement when the emulsifying properties of A. senegal and A. seyal were compared. Indeed, A. senegal containing a greater amount of high molar mass protein rich AGPs and uronic acids and its dispersion having a higher apparent viscosity than A. seyal allowing the former to form emulsion with a more stability. Besides, when Acacia gums were used in the form of dried film, the great content of high molar mass protein-rich AGPs and the good accessibility of proteinaceous moieties of A. senegal allowed the smooth homogeneous surface with a hydrophobic characteristic properties of A. senegal dried films. In contrast, A. seyal films was irregular and composed of a repetitive organization as numerous large particle uniformly distributed on surface in the relation to the low degree of branching, high arabinose content favoring intra and inter molecular hydrogen bonding and high hydration ability causing aggregation of polysaccharide chains of A. seyal. According to the results, this thesis brings new knowledge of the relationship between biochemical composition, structural and physicochemical properties, for the first time, across both aspects of gum, i.e. in the form of liquid dispersion and dried films.Keywords: Acacia gums, interfacial and emulsifying properties, arabinogalactan proteins, aroma compounds
Schmitt, Christophe. "Étude de la coacervation complexe entre la bêta-lactoglobuline et la gomme d'acacia en solution aqueuse." Vandoeuvre-les-Nancy, INPL, 2000. http://docnum.univ-lorraine.fr/public/INPL_T_2000_SCHMITT_C.pdf.
Full textSchmitt, Christophe. "Etude de la coacervation complexe entre la beta-lactoglobuline et la gomme d'acacia en solution aqueuse." Phd thesis, Institut National Polytechnique de Lorraine - INPL, 2000. http://tel.archives-ouvertes.fr/tel-00007723.
Full textServant, Sylvie. "Variabilité des propriétés physico-chimiques d'exsudats d'Acacia senegal (gomme arabique) d'une plantation expérimentale au Ferlo (Sénégal). Modification des chaînes." Rouen, 1994. http://www.theses.fr/1994ROUES045.
Full textAkil, Suzanna. "Etude du mécanisme de coacervation complexeentre les fractions principales de la gommed'Acacia et la β-lactoglobuline - Comparaison avecla gomme d'Acacia non fractionnée." Phd thesis, Institut National Polytechnique de Lorraine - INPL, 2007. http://tel.archives-ouvertes.fr/tel-00190002.
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