PENGARUH FREKUENSI DAN LAMA ULTRASONIKASI TERHADAP KARAKTERISTIK FISIK DAN KIMIA NATA DE COCO HASIL PEWARNAAN DAUN SUJI (Dracaena angustifolia)

DELSIA, GHEA and Pratama, Filli (2022) PENGARUH FREKUENSI DAN LAMA ULTRASONIKASI TERHADAP KARAKTERISTIK FISIK DAN KIMIA NATA DE COCO HASIL PEWARNAAN DAUN SUJI (Dracaena angustifolia). Undergraduate thesis, Sriwijaya University.

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Abstract

This study aimed to determine the effect of frequency and duration of ultrasonication on the physical and chemical characteristics of nata de coco colored with suji (Dracaena angustifolia) leaves extract. The experiment was designed as a Factorial Completely Randomized Design with two treatment factors and each treatment was repeated three times. The first factor was frequency (20 kHz and 40 kHz) and the second factor was duration of ultrasonication (15, 30, 45, and 60 minutes). The observed parameters on nata de coco colored with suji leaves extract were texture, color (lightness (L*), greenness (-a*), yellowness (b*), total color difference (∆E*) and total color difference after boiling), pH and antioxidant. The result showed that the frequency and duration of ultrasonication had a significant effect on texture, lightness (L*), total color difference (∆E*) and total color difference after boiling of nata de coco colored with suji leaves extract; the duration of ultrasonication had a significant effect on pH of nata de coco colored with suji leaves extract; the interaction between two treatment factors had a significant effect on greenness (-a*), yellowness (b*), and antioxidant of nata de coco colored with suji leaves extract. The A2B3 treatment (40 kHz, 45 minutes) was the best treatment based on the value of total color difference (∆E* = 2.11) with characteristics of texture 25.2 gf, lightness 43.23%, greenness 5.67, yellowness 3.77, total color difference after boiling 21.21, pH 3.87 and IC50 value of an antioxidant 1536.33 ppm.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	daun suji, nata de coco, ultrasonikasi.
Subjects:	S Agriculture > S Agriculture (General) > S1-(972) Agriculture (General)
Divisions:	05-Faculty of Agriculture > 41231-Agricultural Product Technology (S1)
Depositing User:	Ghea Delsia
Date Deposited:	19 Jul 2022 02:49
Last Modified:	19 Jul 2022 02:49
URI:	http://repository.unsri.ac.id/id/eprint/74082

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