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Açai pulp addition improves fatty acid profile and probiotic viability in yoghurt
Authors:Ana Paula do Espírito Santo  Roberta C Silva  Fabiana ASM Soares  Douglas Anjos  Luiz A Gioielli  Maricê N Oliveira
Affiliation:1. College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi’an, China;2. College of Animal Science and Technology, Northwest A&F University, Yangling, China;1. Centro de Biotecnologia e Química Fina – Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Rua Dr. António Bernardino Almeida, 4200-072 Porto, Portugal;2. Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal;3. Frulact. S.A., Rua do Outeiro, 589, 4475-150 Gemunde, Maia, Portugal;1. Department of Nutrition and Dietetics, Harokopio University, 70 El. Venizelou Av., 176 71 Kallithea, Athens, Greece;2. Quality Assurance & Quality Control Department, Sklavenitis S.A., Peristeri, Athens, Greece;3. Department of Food Technology, Technological Educational Institute of Athens, Athens, Greece;4. Department of Food Science & Nutrition, University of the Aegean, Myrina, Lemnos, Greece;1. Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;2. Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;3. Bioprocessing and Biomanufacturing Research Center, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;4. Institute for Bioengineering, School of Engineering, University of Edinburgh, Edinburgh EH9 3JL, United Kingdom;1. Departamento de Tecnologia Bioquímico-Farmacêutica, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Av. Prof. Lineu Prestes, 580, 05508-000 São Paulo, SP, Brazil;2. Departamento de Alimentos e Nutrição, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista, Rod. Araraquara-Jaú, km 1, 14801-902 Araraquara, SP, Brazil
Abstract:The effects of açai pulp addition and different probiotic bacteria on the fatty acid profile of stirred yoghurt were examined. Skim milk was divided into two groups: one containing açai pulp and another without the fruit. Batches were inoculated with yoghurt starter culture and divided into five groups according to probiotic addition. Counts of viable microorganisms were measured at days 1, 14 and 28 of cold storage. Fatty acid profile was determined by gas chromatography at day 1. Açai pulp favoured an increase in Lactobacillus acidophilus L10, Bifidobacterium animalis ssp. lactis Bl04 and Bifidobacterium longum Bl05 counts at the end of 4 weeks of cold storage. This study demonstrated that açai pulp addition increased monounsaturated and polyunsaturated fatty acid contents in probiotic yoghurt and enhanced the production of α-linolenic and conjugated linoleic acids during fermentation of skim milk prepared with B. animalis ssp. lactis Bl04 and B94 strains.
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