Comparison of the Effect of Process Temperature on Some Biochemical Properties of Nectars from Fresh and Dried Rosehip
Öz
Rosehip is a widespread wild plant that has been used in food products such as tea, jams, marmalades, nectar. It plays crucial role in traditional medicine because of valuable bioactive compounds including mainly phenolic compounds and ascorbic acid. The present study deals with biochemical and sensory properties of rosehip nectar produced from fresh and sun-dried fruits. The studied rosehips were collected from Gumushane and its neighboring vicinities. The fresh and dried rosehips were pulped at different temperature conditions as 65, 90, 100 ºC and then nectared. Total acidity, total soluble solid contents, pH, total phenolic, ascorbic acid content (vitamin C) and sensory properties of produced nectars were examined. Process temperatures showed statistically significant effect (p< 0.05) on ascorbic acid and total phenolic content. No differences were found in the acidity and pH between nectar samples. All nectar samples treated at 65 ºC exhibited the highest ascorbic acid (56-90 g/100 mL) and total phenolic contents (654.2-894.4 mg GAE/100 mL). Colour and appearance scores of samples obtained at 65 ºC were found higher according to sensory analysis.
Anahtar Kelimeler
Rosehip,nectar,biochemical properties,sensory properties,ascorbic acid,phenolic compounds
Kaynakça
- Adamczak, A., Buchwald, W., Zieliński, J., & Mielcarek, S. (2012). Flavonoid and organic acid content in rose hips (Rosa L., sect. Caninae DC. EM. Christ.). Acta biologica cracoviensia series botánica, 54(1), 105-112. (https://doi.org/10.2478/v10182-012-0012-0).
- Akinci, I., Ozdemir, F., Topuz, A., Kabas, O., & Canakci, M. (2004). Some physical and nutritional properties of Juniperus drupacea fruits. Journal of Food Engineering, 65(3), 325-331.( https://doi.org/10.1016/j.jfoodeng.2004.01.029).
- Al-Yafeai, A., Malarski, A., & Böhm, V. (2018). Characterization of carotenoids and vitamin E in R. rugosa and R. canina: Comparative analysis. Food Chemistry, 242, 435-442.
- Anonymous, (2012). The Standard of Sour cherry juice, No: TS 3631. Turkish Standards Institution, Ankara, Turkey.
- Anonymous, 2014. The Standard of Rose hip nectar. Turkish Standards Institution, Ankara, Turkey.
- AOAC, (2000). Official methods of analyses, Official methods of analysis of AOAC International. CD-ROM. 17th edition, Arlington, VA: AOAC International.
- Aramwit, P., Bang, N., & Srichana, T. (2010). The properties and stability of anthocyanins in mulberry fruits. Food Research International, 43(4), 1093-1097.( https://doi.org/10.1016/j.foodres.2010.01.022).
- Bake, K. (1984). Flüss. Obst. 51:597.
- Bhave, A., Schulzova, V., Chmelarova, H., Mrnka, L., & Hajslova, J. (2017). Assessment of rosehips based on the content of their biologically active compounds. Journal of Food and Drug Analysis, 25, 681-690. ( https://doi.org/10.1016/j.jfda.2016.12.019).
- Cemeroglu, B. & Acar, J. (1986). Meyve ve sebze işleme teknolojisi, Ankara, Turkey: Güven Yayıncılık.