Jannah, Fathia and Zulkifli, Zulkifli and Handayani, T.T. and Lande, Martha L. (2018) Interaksi Antara Asam Benzoat dan Temperatur Terhadap Browning Jus Buah Belimbing Manis (Averrhoa carambola L.). Jurnal Penelitian Pertanian Terapan, 18 (3). ISSN 1410-5020 (In Press)

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Abstract

The purpose of this research was to find out whether the addition of benzoic acid could inhibit browning of sweet star fruit juice. The addition of benzoic acid was done after sweet star fruit juice was treated 0 ºC, 25 ºC and 50 ºC. The experiment was conducted in a 3 x 2 factorial experiment with 4 replications. Factor A was a temperature with 3 levels: 0 ºC, 25 ºC, 50 ºC and B factor was benzoic acid with 2 levels: 0% w/v and 10% w/v. Quantitative parameters are brown index and total dissolved carbohydrate content. Qualitative parameters are dehydrogenase enzyme activity and reducing sugar level. Levene test and variance analysis were performed at 5% significant level. If the interaction of factor A and B is not real then the main effect is determined by the Tukey test at 5% significant level. If the interaction is real then the simple effect of factor B on each factor A with the F test at 5% significant level. The results showed that the increase of benzoic acid increased the clarity of sweet star fruit juice. The browning index of sweet star fruit juice treated 0 ºC, 25 ºC has decreased by 88% and 89% after addition of benzoic acid but did not affect the total soluble carbohydrate content of sweet star fruit juice. Temperature treatment 25 ºC and 50 ºC decreased total dissolved carbohydrate content by 6% and 9% respectively compared to 0 ºC treatment. Dehydrogenase enzyme activity relative higher at temperature 25 ºC either without addition or with addition of benzoic acid compared to temperature 0 ºC and 50 ºC. The reducing sugar was detected in all treatments. From the study it concluded that the addition of benzoic acid can inhibit browning sweet star fruit juice.

Item Type: Article
Subjects: Q Science > QK Botany
Divisions: Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA) > Prodi Biologi
Depositing User: T. T. HANDAYANI
Date Deposited: 28 Jun 2018 01:55
Last Modified: 28 Jun 2018 01:55
URI: http://repository.lppm.unila.ac.id/id/eprint/7986

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