PMID- 30150839 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200929 IS - 0022-1155 (Print) IS - 0975-8402 (Electronic) IS - 0022-1155 (Linking) VI - 55 IP - 9 DP - 2018 Sep TI - Foaming properties of acid-soluble protein-rich ingredient obtained from industrial rapeseed meal. PG - 3792-3798 LID - 10.1007/s13197-018-3311-y [doi] AB - The use of the rapeseed meal as a source for preparation of protein-rich ingredients for the food industry is an alternative to the current limited application as a feed additive. The aim of this study was to evaluate foaming properties of an acid-soluble protein-rich ingredient (ASP) obtained from industrial rapeseed meal as a co-product of a protein isolate. Foam capacity and stability over a period of 60 min were evaluated by using volumetric and image analyzing methods. The influence of NaCl at two boundary concentrations (0.03 and 0.25 M) was studied over a pH range from 2 to 10. The ASP exhibited high foamability (> 90%), not influenced by pH or salt addition. In contrast, foam stability, measured over a 60 min period, was pH and NaCl dependent. By the end of the observation period, the addition of 0.25 M NaCl reduced the foam volume by more than 70% at all pH values. After 30 min at pH values 4, 6 and 8, which are the most common for food products, the foams without NaCl retained 51, 38 and 41% of the initial foam volume, respectively. The results were in agreement with image analysis observations where microstructure of the foams with NaCl was more heterogeneous than that of the foams without salt addition. The high foamability and relatively high foam stability at pH from 4 to 8 without NaCl addition shows that ASP could be a potential alternative to plant proteins currently used as foaming agents in the food industry. FAU - Ivanova, Petya AU - Ivanova P AD - 1Department of Biochemistry and Molecular Biology, University of Food Technologies, 26 Maritsa Blvd, 4002 Plovdiv, Bulgaria. GRID: grid.61777.30 FAU - Kalaydzhiev, Hristo AU - Kalaydzhiev H AD - 1Department of Biochemistry and Molecular Biology, University of Food Technologies, 26 Maritsa Blvd, 4002 Plovdiv, Bulgaria. GRID: grid.61777.30 FAU - Dessev, Tzvetelin T AU - Dessev TT AD - 2Department of Technology of Cereal and Bakery Products, University of Food Technologies, 26 Maritsa Blvd, 4002 Plovdiv, Bulgaria. GRID: grid.61777.30 FAU - Silva, Cristina L M AU - Silva CLM AD - 3Universidade Catolica Portuguesa, CBQF - Centro de Biotecnologia e Quimica Fina - Laboratorio Associado, Escola Superior de Biotecnologia, Rua Arquiteto Lobao Vital 172, 4200-374 Porto, Portugal. ISNI: 000000010410653X. GRID: grid.7831.d FAU - Rustad, Turid AU - Rustad T AD - 4Department of Biotechnology and Food Science, Norwegian University of Science and Technology, 7491 Trondheim, Norway. ISNI: 0000 0001 1516 2393. GRID: grid.5947.f FAU - Chalova, Vesela I AU - Chalova VI AUID- ORCID: 0000-0001-5139-5389 AD - 1Department of Biochemistry and Molecular Biology, University of Food Technologies, 26 Maritsa Blvd, 4002 Plovdiv, Bulgaria. GRID: grid.61777.30 LA - eng PT - Journal Article DEP - 20180809 PL - India TA - J Food Sci Technol JT - Journal of food science and technology JID - 0056471 PMC - PMC6098807 OTO - NOTNLM OT - Acid-soluble protein-rich ingredient co-production OT - Ethanol treated rapeseed meal OT - Foam capacity and stability OT - Foam microstructure OT - Image analysis EDAT- 2018/08/29 06:00 MHDA- 2018/08/29 06:01 PMCR- 2019/09/01 CRDT- 2018/08/29 06:00 PHST- 2018/06/20 00:00 [revised] PHST- 2018/06/21 00:00 [accepted] PHST- 2018/08/29 06:00 [entrez] PHST- 2018/08/29 06:00 [pubmed] PHST- 2018/08/29 06:01 [medline] PHST- 2019/09/01 00:00 [pmc-release] AID - 3311 [pii] AID - 10.1007/s13197-018-3311-y [doi] PST - ppublish SO - J Food Sci Technol. 2018 Sep;55(9):3792-3798. doi: 10.1007/s13197-018-3311-y. Epub 2018 Aug 9.