WorldCat Identities

Bertrand, Dominique (1948-....).

Overview
Works: 2 works in 4 publications in 1 language and 4 library holdings
Roles: Author, Opponent
Publication Timeline
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Most widely held works by Dominique Bertrand
Utilisation des analyses multidimensionnelles en spectroscopie de réflexion dans le proche infrarouge : application à la caractérisation de la qualité technologique du blé et de ses produits de mouture by Dominique Bertrand( Book )

3 editions published in 1988 in French and held by 3 WorldCat member libraries worldwide

Dans cette étude, de nouvelles procédures mathématiques sont étudiées, avec pour objectif de simplifier et de rendre plus cohérentes l'exploitation des données spectrales. Les essais ont porté principalement sur le blé et sur ses produits de mouture. Une expérience, effectuée sur des mélanges modèles de matières premières, montre que l'analyse en composantes principales est applicable aux données spectrales et donne des résultats interprétables. Deux essais portent sur la discrimination des variétés de blés à partir des spectres proche infrarouges des échantillons. Enfin, à partir d'une étude de produits dérivés du blé dur, il a été possible de montrer que les analyses multidimensionnelles créent implicitement un "modèle spectral" interprétable en terme de spectroscopie. L'application des méthodes mathématiques étudiées est un moyen de rendre plus fiable et plus riche d'informations la SPIR
Etude de la caractérisation de matières collagéniques pour spectroscopie Infrarouge. : Mise au point et développement d'un système d'analyse en mode dynamique par l'industrie de la Gélatine. by Simon Duthen( )

1 edition published in 2018 in French and held by 1 WorldCat member library worldwide

Gelatin is a natural biopolymer obtained after denaturation and partial hydrolysis of collagen fibers, a fibrillar protein present in the connective tissues of all species of the animal kingdom. It is used in various industries, including the agri-food, pharmaceutical, photographic and cosmetic industries. Its functional properties depend on the manufacturing process, but also on the origin of the collagenous materials. The objective of this thesis is to characterize the raw material (pig rind), but also the gelatin obtained during the process, by a fast and non-destructive tool. The use of near-infrared spectroscopy coupled with chemometric methods allowed us to work on the scale of the laboratory but also on the industrial chain. The first study examines the heterogeneity of pig rinds, under laboratory conditions, in terms of protein, fat, moisture and collagen contents. Several models have been developed to predict these levels, from near infrared spectra collected on moving rinds. The best models have good performances. In the second industrial scale trial, an approach to gelatin yield from 75 tons batches was proposed. The predictive approach has not been conclusive; however, classification approaches have shown interesting results. The next two tests were on gelatin. The third test allowed the development of models for predicting the physicochemical properties of gelatin samples from near-infrared spectra, demonstrating very good predictive capabilities of these parameters (r²> 0.9). Finally, a final test allowed to link the molecular characteristics of the gelatin to its physicochemical properties, by the technique of Asymmetrical Field-Flow Fractionation coupled with a Multiangular Light Scattering Detector (MALS). The characterization parameters of AFlFFF-MALS make it possible to partially discriminate gelatin samples with different bloom and viscosity parameters
 
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Audience level: 0.93 (from 0.93 for Etude de l ... to 0.94 for Etude de l ...)

Languages
French (4)