idw – Informationsdienst Wissenschaft

Nachrichten, Termine, Experten

Grafik: idw-Logo
Science Video Project
idw-Abo

idw-News App:

AppStore

Google Play Store



Instanz:
Teilen: 
13.10.2015 15:37

Sous-vide cooking of muscle meat: how to perpare tender & juicy (pork) filets

Natacha Bouvier Presse- und Öffentlichkeitsarbeit
Max-Planck-Institut für Polymerforschung

    Mainz. Professor Thomas Vilgis, Project Leader at the Max Planck Institute for Polymer Research in Mainz, and his team look into protein denaturation of meat using a sous-vide technique. Their results have now been published in Food Biophysics and should help you prepare delicious pork filets.

    Mainz. Professor Thomas Vilgis, Project Leader at the Max Planck Institute for Polymer Research in Mainz, and his team look into protein denaturation of meat using a sous-vide technique. Their results have now been published in Food Biophysics and should help you prepare delicious pork filets.

    This study systematically investigates the impact of time (10 minutes – 48 hours) at different cooking temperatures (45 – 74°C) on the state of protein denaturation and water content of a cooked piece of meat. The scientists used the so-called DSC (Differential Scanning Calorimetry) method in order to perform the measurements. This is the first study to address such a broad range of times and such well-defined temperatures. This is particularly important since every muscle protein denatures at a precisely defined temperature.

    “This study has important gastronomical implications: it discredits a common belief. Cooked meat had long been held warm until serving. It was thought that maintaining meat at a constant temperature was better than reheat it. This study now shows that the ongoing protein denaturation over a long period of time might lead to undesired properties such as a lack of tenderness or juiciness”, explains Thomas Vilgis.

    Upon heating muscle and connective tissue lose their native molecular shape or conformation. It causes a change in the texture. Above 60°C, muscle meat loses the bigger part of its water. It gets hard, tough and fibrous. Between 48°C and 71°C, different proteins gradually change shape. They shrink, form close meshed networks or coagulate. Factors such as juiciness or tenderness change to the same extend. Sous-vide cooking enables to best control the exact temperature and thus the associated properties.

    The sous-vide technique is a common cooking method used in the gastronomy. Food is sealed in an airtight plastic bag then placed in a water bath at a well-defined temperature. The aim is to cook the item evenly, ensuring that the inside is properly cooked without overcooking the outside, and to retain moisture. Fresh meat contains about 75% of water. Yet cooking meat is a complex process. The water holding capacity of meat as well as the water loss changes at high cooking temperature. By controlling the denaturation state of meat proteins using sous-vide cooking, the meat will remain tender and juicy. Selective denaturation of meat proteins is essential to reach the desired textures. Please remember: the loss of meat juices increases with time and temperature. The main water loss, for its part, occurs during the first 20 minutes and at temperatures above 60°C. In the end, to obtain the best pork filet (average sized), cook it sous-vide for 20 minutes at 55°C.


    Weitere Informationen:

    http://www.mpip-mainz.mpg.de/Sous_vide_cooking - Press release and original publication
    http://www.mpip-mainz.mpg.de/Thomas_Vilgis - Information about Prof. Dr. Vilgis and his research
    http://www.mpip-mainz.mpg.de/home/en - Max Planck Institute for Polymer Research


    Bilder

    Differential scanning calorimentry defines different regions of protein denaturation with different water loss. At temperatures below 60 °C the meat remains tender and juicy.
    Differential scanning calorimentry defines different regions of protein denaturation with different ...
    © Thomas Vilgis / MPI-P
    None


    Merkmale dieser Pressemitteilung:
    Journalisten, Wissenschaftler
    Biologie, Chemie, Ernährung / Gesundheit / Pflege
    überregional
    Forschungsergebnisse, Wissenschaftliche Publikationen
    Englisch


     

    Differential scanning calorimentry defines different regions of protein denaturation with different water loss. At temperatures below 60 °C the meat remains tender and juicy.


    Zum Download

    x

    Hilfe

    Die Suche / Erweiterte Suche im idw-Archiv
    Verknüpfungen

    Sie können Suchbegriffe mit und, oder und / oder nicht verknüpfen, z. B. Philo nicht logie.

    Klammern

    Verknüpfungen können Sie mit Klammern voneinander trennen, z. B. (Philo nicht logie) oder (Psycho und logie).

    Wortgruppen

    Zusammenhängende Worte werden als Wortgruppe gesucht, wenn Sie sie in Anführungsstriche setzen, z. B. „Bundesrepublik Deutschland“.

    Auswahlkriterien

    Die Erweiterte Suche können Sie auch nutzen, ohne Suchbegriffe einzugeben. Sie orientiert sich dann an den Kriterien, die Sie ausgewählt haben (z. B. nach dem Land oder dem Sachgebiet).

    Haben Sie in einer Kategorie kein Kriterium ausgewählt, wird die gesamte Kategorie durchsucht (z.B. alle Sachgebiete oder alle Länder).