Department of Food Science, Stellenbosch University, Matieland, South Africa.
Plant Bioactives Group, Post-Harvest and Agro-Processing Technologies, Agricultural Research Council (ARC), Infruitec-Nietvoorbij, Stellenbosch, South Africa.
J Sci Food Agric. 2019 Feb;99(3):1029-1037. doi: 10.1002/jsfa.9267. Epub 2018 Sep 10.
There is epidemiological evidence that fruits and vegetables promote general health due to their phenolic composition. The phenolic composition of three commercially important citrus varieties ('Mandarin', 'Navel' orange and 'Valencia' orange), used for frozen concentrated orange juice (FCOJ) production in South Africa, were evaluated based on variety, production season and geographical region (Western Cape (WC) and Eastern Cape (EC)).
FCOJ from the WC had significantly (P < 0.05) lower titratable acidity (TA) and higher total soluble solids (TSS):TA ratio compared to FCOJ produced in the EC. The 'Navel' FCOJ, irrespective of season and region, had the highest (P < 0.05) phenolic content (sum of quantified compounds, TP). Regional effects were clear for the 'Mandarin' variety, the EC 'Mandarin' FCOJ had the highest TP and WC 'Mandarin' had the lowest. Seasonal differences were less evident. Variation that could be ascribed to regional differences were also found for individual phenolic compounds.
Robust data regarding the phenolic profile of FCOJ produced in South Africa, suitable for inclusion in food composition databases, were collected. © 2018 Society of Chemical Industry.
有流行病学证据表明，水果和蔬菜因其酚类成分而促进整体健康。基于品种、生产季节和地理位置（西开普省（WC）和东开普省（EC）），评估了用于南非冷冻浓缩橙汁（FCOJ）生产的三种商业上重要的柑橘品种（“橘”、“脐橙”和“瓦伦西亚橙”）的酚类成分。
与 EC 生产的 FCOJ 相比，WC 的 FCOJ 的可滴定酸度（TA）显著降低（P < 0.05），总可溶固形物（TSS）：TA 比值较高。无论季节和地区如何，“脐橙”FCOJ 的酚类含量（定量化合物之和，TP）最高（P < 0.05）。“橘”品种的地区影响明显，EC 的“橘”FCOJ 的 TP 最高，WC 的“橘”最低。季节性差异不太明显。对于个别酚类化合物，也发现了归因于地区差异的变异。
收集了有关南非生产的 FCOJ 的酚类成分的可靠数据，这些数据适合纳入食品成分数据库。 © 2018 英国化学学会。
