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All Journal Bioscientist : Jurnal Ilmiah Biologi Journal of Agri-Food Science and Technology (JAFoST)
Qalbi, Rainatul
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Education Immunology & microbiology Social Sciences

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Effect of Drying Time on Physicochemical Characteristics of Dragon Fruit Peels Powder (Hylocereus polyrhizus) Qalbi, Rainatul; Giovani, Sarah; Guo, Qiyong; Adelina, Nadya Mara
Journal of Agri-Food Science and Technology Vol. 4 No. 2 (2023): November
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/jafost.v4i2.9294

Abstract

The increasing production and demand of dragon fruit (Hylocereus polyrhizus) in Indonesia produces a high amount of dragon fruit peel waste that can pollute the environment. As an alternative, dragon fruit peel could be applied as a functional food ingredient due to its high fiber content and antioxidant capacity. This study contributed to analyzing the effect of drying time on the physical and chemical characteristics of dragon fruit peel powder. To optimize the functional properties, dragon fruit peel was developed into a powder that was prepared by using a food dehydrator at 60 °C with drying times of 4, 5, and 6 h. The results showed that the longer drying time led to lower moisture and protein content, which reached the lowest at 9.73% and 13.07% with a drying time of 6 h, respectively. Meanwhile, drying time (4-6 h) did not significantly affect the ash (13.74-14.57%), fat (22.46-23.46%), and crude fiber content (29.13-31.75%) of dragon fruit peel powder. The drying time can affect antioxidant activity significantly, while the highest antioxidant activity was found in 6 h drying time (IC50 0.03 gram/mL). The L* value was measured between 29.68-30.23, a* value 9.61-10.34, and b* value 15.20-16.53. The drying time of 4 h could maintain the color of dragon fruit peel and produce the highest yield product at 4.52%. In general, drying dragon fruit peel powder for 4 hours gave the best results for high fiber content and high yield. Drying it for 6 hours was suggested to increase its antioxidant activity.
Karakteristik Mutu Pikel Jahe dengan Penambahan Ekstrak Bawang Dayak Anggarkasih, Made Gayatri; Fatimah, Ai Imas Faidoh; Hapsari, Rianti Dyah; Nurwitri, CC; Qalbi, Rainatul
Bioscientist : Jurnal Ilmiah Biologi Vol 12, No 2 (2024): December
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v12i2.13242

Abstract

Processing ginger into pickles can provide added economic value and potentially become an export commodity. Ginger pickles are made by soaking ginger slices in a salt solution. Improving the quality of elephant ginger pickles can be done by adding natural dyes to have a pink color like Gari. Dayak onion extract can be used as a natural dye. This research aimed to determine the quality characteristics of ginger pickle with the addition of Dayak onion extract to the soaking medium at 7 dan 14 fermentation days and compare it with a salt solution soaking medium of various concentrations. This study is experimental research that used a Completely Randomized Design consisting of 6 treatments, namely a water-based and a Dayak onion extract-based soaking solution, each made with 5%, 7%, and 9% (w/v) salt concentration. The results showed (1) Adding Dayak Onion extract and variations of salt concentration in elephant ginger pickles had a significant effect on pH, and TPT and had no significant effect on the color and number of lactic acid bacteria); (2) Ginger pickles with a water-based 7% concentration salt solution (P2) most preferred treatment by the panelists.
Karakteristik Mutu Pikel Jahe dengan Penambahan Ekstrak Bawang Dayak Anggarkasih, Made Gayatri; Fatimah, Ai Imas Faidoh; Hapsari, Rianti Dyah; Nurwitri, CC; Qalbi, Rainatul
Bioscientist : Jurnal Ilmiah Biologi Vol. 12 No. 2 (2024): December
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v12i2.13242

Abstract

Processing ginger into pickles can provide added economic value and potentially become an export commodity. Ginger pickles are made by soaking ginger slices in a salt solution. Improving the quality of elephant ginger pickles can be done by adding natural dyes to have a pink color like Gari. Dayak onion extract can be used as a natural dye. This research aimed to determine the quality characteristics of ginger pickle with the addition of Dayak onion extract to the soaking medium at 7 dan 14 fermentation days and compare it with a salt solution soaking medium of various concentrations. This study is experimental research that used a Completely Randomized Design consisting of 6 treatments, namely a water-based and a Dayak onion extract-based soaking solution, each made with 5%, 7%, and 9% (w/v) salt concentration. The results showed (1) Adding Dayak Onion extract and variations of salt concentration in elephant ginger pickles had a significant effect on pH, and TPT and had no significant effect on the color and number of lactic acid bacteria); (2) Ginger pickles with a water-based 7% concentration salt solution (P2) most preferred treatment by the panelists.
Co-Authors Fatimah, Ai Imas Faidoh Giovani, Sarah Guo, Qiyong Hapsari, Rianti Dyah Made Gayatri Anggarkasih Nadya Mara Adelina Nurwitri, CC