02.07.2013 Views

Analyse protéomique d'alterations de propriétés sensorielles et ...

Analyse protéomique d'alterations de propriétés sensorielles et ...

Analyse protéomique d'alterations de propriétés sensorielles et ...

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

V- CONCLUSIONS ............................................................................... 55<br />

TRAVAIL EXPERIMENTAL ................................................56<br />

MATERIEL ET METHODES................................................57<br />

I- LES ANIMAUX ET LES PRELEVEMENTS .................................................. 57<br />

I.1- SÈlection <strong>de</strong> din<strong>de</strong>s selon la couleur <strong>de</strong> leur muscle pectoral ‡ 24 h post mortem<br />

(expÈrience couleur)................................................................................................ 57<br />

I.2- SÈlection <strong>de</strong> din<strong>de</strong>s selon la valeur du pH ‡ 20 min post mortem........................ 59<br />

I.3- Simulation <strong>de</strong> conditions favorables ‡ líapparition <strong>de</strong> dÈfauts <strong>de</strong> type PSE chez<br />

<strong>de</strong>ux types gÈnÈtiques <strong>de</strong> din<strong>de</strong> (expÈrience Label)................................................... 60<br />

II- LES ANALYSES............................................................................... 61<br />

II.1- Les analyses ´ <strong>sensorielles</strong> ª <strong>et</strong> technologiques.................................................. 61<br />

II.1.1- Mesure du pH............................................................................................................61<br />

II.1.2- Mesure <strong>de</strong> la couleur .................................................................................................61<br />

II.1.3- Evaluation <strong>de</strong> la capacitÈ <strong>de</strong> rÈtention en eau ............................................................61<br />

II.1.3.a. Pertes au cours du ressuage................................................................................62<br />

II.1.3.b. Pertes ‡ la conservation, dÈcongÈlation <strong>et</strong> cuisson ...............................................62<br />

II.1.3.c. Mesure du ren<strong>de</strong>ment technologique NAPOLE (RTN) ............................................62<br />

II.1.3.d. Gel <strong>de</strong> vian<strong>de</strong>.......................................................................................................63<br />

II.1.4- Mesure <strong>de</strong> la tendr<strong>et</strong>È ................................................................................................63<br />

II.1.4.a. Test <strong>de</strong> cisaillement .............................................................................................63<br />

II.1.4.b. Test <strong>de</strong> compression ............................................................................................64<br />

II.2- Mesures histologiques........................................................................................................................ 65<br />

II.2.1- Coloration ‡ líazorubine ............................................................................................................................... 65<br />

II.2.2- Longueur <strong>de</strong>s sarcomËres ..........................................................................................65<br />

II.3- <strong>Analyse</strong>s <strong>de</strong>s protÈines musculaires................................................................. 66<br />

II.3.1- Mesure du pouvoir tampon <strong>de</strong> la vian<strong>de</strong> ....................................................................66<br />

II.3.2- ExtractabilitÈ <strong>et</strong> dosage <strong>de</strong>s protÈines musculaires ....................................................66<br />

II.3.3- Chromatographie avec Èchange díions .......................................................................67<br />

II.3.4- ElectrophorËse mono-dimensionnelle en conditions dÈnaturantes SDS-PAGE ............67<br />

II.3.5- ElectrophorËses bidimensionnelles ............................................................................68<br />

10

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!