PENGARUH ULTRASONIKASI TERHADAP KARAKTERISTIK FISIK DAN KIMIA BUAH NANAS(Ananas comosus (L.) Merr) SEGAR UTUH VARIETAS QUEEN

WIASTIAN, RANI and Pratama, Filli (2021) PENGARUH ULTRASONIKASI TERHADAP KARAKTERISTIK FISIK DAN KIMIA BUAH NANAS(Ananas comosus (L.) Merr) SEGAR UTUH VARIETAS QUEEN. Undergraduate thesis, Sriwijaya University.

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Abstract

Pineapple of queen variety contains high sugar content so it is not recommended for people with limited sugar consumption. One of the efforts that can be done was treating pineapple with ultrasonication. This study aimed to determine the effect of ultrasound frequency and duration on the physical and chemical characteristics of whole fresh pineapple of queen variety. The experiment was designed as a Factorial Completely Randomized Design (RALF) with two treatment factors and each treatment was repeated three times. The first factor was the ultrasound frequency (20 kHz and 40 kHz) and the second factor was duration of contact (10, 15, 20, 25, 30 and 40 minutes). The observed parameters on pineapple were color (lightness (L*), redness (a*), yellowness (b*) and total color difference (∆E*)), texture, total sugar content, pH and vitamin C content. The results showed that the ultrasound frequency had a significant effect on the lightness of whole fresh pineapple; duration of contact had a significant effect on yellowness and pH of whole fresh pineapple. The interaction of ultrasound frequency and duration of contact had a significant effect on the redness of whole fresh pineapple. The A1B5 treatment (20 kHz, 30 minutes) was the best treatment based on the lowest total sugar content 10.87%°brix with a characteristic of pH 3.63, vitamin C content 11.03 mg/100 g, lightness 46.10%, redness 5.77, yellowness 15.00, total color difference 3.76 and texture 30.18 gf.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Sifat Fisik, Kimia, Buah Nanas, Ultrasonikasi, Varietas Queen
Subjects:	S Agriculture > S Agriculture (General) > S1-(972) Agriculture (General)
Divisions:	05-Faculty of Agriculture > 41231-Agricultural Product Technology (S1)
Depositing User:	Users 9054 not found.
Date Deposited:	27 Jul 2021 06:46
Last Modified:	27 Jul 2021 06:46
URI:	http://repository.unsri.ac.id/id/eprint/50256

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