Microalgae have already shown their potential as an alternative source of n-3 LC-PUFA. In this study, 5 different microalgal species (Isochrysis, Nannochloropsis, Phaeodactylum, Porphyridium and Schizochytrium) were added to an acidic model system and screened on their potential use in acidic food matrices. The impact of mechanical and thermal processing on the model systems was studied by analyzing the amount of n-3 LC-PUFA, free fatty acids, carotenoids, lipid polymers and the oxidative stability. A (limited) reduction of n-3 LC-PUFA was observed. Thermal alterations combined with the presence of free fatty acids seemed to be the causing factor for this decrease. Furthermore, the oxidative stability of model systems enriched with photoautotrophic microalgae was significantly higher than of those enriched with heterotrophic microalgae. It can therefore be concluded that photoautotrophic microalgae low in initial free fatty acid content are a promising source of n-3 LC-PUFA in thermally processed acidic food systems.

微藻已经显示出其作为n-3 LC-PUFA替代来源的潜力。在这项研究中，有5种不同的微藻物种（等鞭藻，拟南芥，噬菌体，紫菜和裂殖壶菌））添加到酸性模型系统中，并筛选了它们在酸性食品基质中的潜在用途。通过分析n-3 LC-PUFA，游离脂肪酸，类胡萝卜素，脂质聚合物的含量和氧化稳定性，研究了机械和热处理对模型系统的影响。观察到（有限的）n-3 LC-PUFA的减少。热变化加上游离脂肪酸的存在似乎是造成这种下降的原因。此外，富含光自养微藻的模型系统的氧化稳定性显着高于富含异养微藻的模型系统。因此可以得出结论，初始游离脂肪酸含量低的光合自养微藻类是热加工酸性食品系统中n-3 LC-PUFA的有希望来源。