Natural Inhibitors to Increase the Antioxidant Activity of Yacon Tubers Syrup

Abstract

Yacon tubers contain various bioactive including flavonoids and phenolic compounds, having antioksidant properties. The aim of the study was to obtain the effect of using natural inhibitors on the antioxidant activity of yacon tubers syrup. Phytochemical tests are used in the determination of flavonoids, phenolic content and antioxidant activity. Total content of phenol and flavonoid were measured by spectrophotometry, while the antioxidant activity was measured by DPPH method. The results showed that the use of natural inhibitors affects the antioxidant activity of yacon tuber syrup. The content of flavonoids and phenolic compounds in yacon syrup using natural inhibitors were 148.093±3.973 and 1244.595±67.672 ppm, significantly different from yacon syrup without inhibitors 100.923±9.277 and 978.912±54.223ppm. Antioxidant activity of syrup with natural inhibitors were 52.888% and IC50: 6.383, while yacon syrup without inhibitors were 24.388% and IC50: 11.180.

In Vitro Determination of Fe Levels and Fe Bioavaailabilities Prediction from Dahlia Tuber Syrup (Pinnata Cav.)

“…Followed by filtering, then the sample is evaporated. Then filtered again and continued with a freeze dryer for ± 6 hours until the syrup thickens [14]. Determination of Fe content in syrup, Dahlia syrup is heated using a frying pan with a low flame and stirred until it becomes a powder, then the powder is tested using XRF instruments and the results obtained are Fe levels in the form of percent which are then converted into ppm.…”

“…Followed by filtering, then the sample is evaporated. Then filtered again and continued with a freeze dryer for ± 6 hours until the syrup thickens [14].…”

PENGARUH PEMBERIAN SIRUP UMBI YAKON TERHADAP KADAR KALSIUM TULANG FEMUR TIKUS PUTIH (Rattus Norvegicus)

“…Lobo [14] membahas tentang efek yakon dalam bentuk tepung terhadap proses pembentukan tulang. Menurut [15], senyawa bioaktif umbi yakon seperti FOS dan asam klorogenat dapat dikonsumsi secara efektif dan masa simpan lebih panjang dalam bentuk ekstraknya yaitu sirup yakon. Berdasarkan latar belakang diatas maka penulis merasa perlu untuk melakukan penelitian tentang pengaruh pemberian sirup umbi yakon terhadap kadar kalsium (Ca) pada tulang femur hewan coba.…”

Pengaruh Sirup Umbi Yakon Terhadap Bioavailabilitas Fe (Zat Besi) Rattus Norvegicus

“…Hal ini membuat sirup yakon menghasilkan efek kesehatan yang salah satunya bermanfaat pada wanita menopause obesitas dengan resistensi inulin [13]. Berdasarkan penelitian Yuanita [14] sirup yakon juga dapat meningkatkan sistem imun seluler dan humoral pada R. norvegicus.…”

“…Dilanjutkan dengan penyaringan, lalu sampel dievaporasi. Kemudian disaring kembali dan dilanjutkan dengan freeze dryer selama ±6 jam hingga sirup mengental [14]. Persiapan hewan coba Tikus putih R. norvegicus jantan dengan berat badan 150-200 gram sebanyak 43 ekor dibagi menjadi 3 kelompok sampel.…”