KARAKTERISTIK FISIK DAN KIMIA NATA DE COCO DENGAN KULIT BUAH NAGA MERAH (Hylocereus polyrhizus) SEBAGAI PEWARNA ALAMI MELALUI METODE ULTRASONIKASI 2022

PRAWIRA, MUHAMMAD ADITYA and Pratama, Filli (2022) KARAKTERISTIK FISIK DAN KIMIA NATA DE COCO DENGAN KULIT BUAH NAGA MERAH (Hylocereus polyrhizus) SEBAGAI PEWARNA ALAMI MELALUI METODE ULTRASONIKASI 2022. Undergraduate thesis, Sriwijaya University.

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Abstract

This study aimed to determine the effect of ultrasonic wave frequency and ultrasonication time on physical and chemical characteristics of nata de coco colored with red dragon fruit peel (Hylocereus polyrhizus). This experiment used a Factorial Completely Randomized Design (RALF) with two treatment factors and was repeated three times. The first factor was frequency (20 kHz and 40 kHz) and the second factor was ultrasonication time (15, 30, 45, and 60 minutes). The observed parameters were hardness, color (lightness (L*), redness (a*), yellowness (b*) and total color difference (ΔE*)), color stability, antioxidants, and pH. The results showed that the frequency and duration of ultrasonication significantly affected the antioxidant and pH; duration of ultrasonication had a significant effect on redness (b*) of sample; the interaction between the two treatments had a significant effect on the antioxidant value and pH of sample. A1B4 treatment (40, kHz, 60 minutes) was the best treatment based on the highest IC50 value of antioxidant activity which is 3663,80 ppm with a hardness value of 20.07 gf, lightness (L*) 39.40%, redness (a*) 18.47%, yellowness 9.07%, total color difference 26.55, ΔE* color after boiling 29.98, and pH 3.87.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Nata de coco, Kulit buah naga merah, Ultrasonikasi
Subjects:	S Agriculture > S Agriculture (General) > S1-(972) Agriculture (General)
Divisions:	05-Faculty of Agriculture > 41231-Agricultural Product Technology (S1)
Depositing User:	Muhammad Aditya Prawira
Date Deposited:	19 Jul 2022 06:53
Last Modified:	19 Jul 2022 06:53
URI:	http://repository.unsri.ac.id/id/eprint/74157

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