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Prof. Dr. Stefan Johannes Wittke

  • Functions: Leiter des Labors für (marine) Biotechnologie
  • Tasks: Hochschule Bremerhaven: Mitglied im Fachbereichsrat FB 1 Stellv. Leiter der Schwerbeschädigtenvertretung der HS Bremerhaven Stellv. Mitglied im Personalrat Leiter des Prüfungsausschusses BMR / BioT Extern: Mitglied im Ausschuss „massenspektrometrische Proteinanalytik“ nach §64 LFGB am Bundesamt für Verbraucherschutz und Lebensmittelsicherheit (BVL)
Termin vereinbaren

List of Publications: https://www.researchgate.net/profile/Stefan_Wittke https://scholar.google.de/citations?user=SEt0Z6QAAAAJ&hl=de

SFWF

The substitution of high priced ingredients by low priced ingredients is a problem that can be observed in the food industry ("horse meat"). This issue is gaining importance because retail standards (e.g. IFS, BRC) have formulated high requirements for authenticity control. In Germany, around 70,000 t of mechanically separated meat are processed annually. The use of mechanically separated meat from chicken and pigs is subject to declaration, but in contrast to mechanically separated meat from beef, sheep and goat, it is generally permitted. Translated with www.DeepL.com/Translator (free version)

Flavor

An addition of e.g. blood plasma < 2% must be labeled as an ingredient in the list of ingredients under food law. A proportion > 2% must be named as a meat substitute, stating the product name. The present project idea is therefore intended to provide a new and specific analysis method for foreign protein additives in meat and sausage products, whereby the mass spectrometric detection of foreign protein-specific marker peptides is to be carried out using LC-MS/MS

ProInsect

Novel foods require authorization, which is regulated by the Novel Food Regulation (Regulation EU No. 2015/2283). However, IBPs are not unproblematic from a consumer perspective as they have allergenic potential and are also prohibited for vegans/vegetarians and members of various religious communities (e.g. kosher, halal). The basic idea of the new detection method for insect raw materials is to investigate the proteome of insects approved for the production of IBPs, but also of typical insect contaminants (Drosphila sp., sunflower moth, etc.) in order to define species-specific or general insect markers on a protein basis.