Ryadi, Jansen and Widiputri, Diah Indriani and Rahmawati, Della (2018) Development of Combined Postharvest and Pre-Treatment Process to Optimize Antioxidant Activity of Kelakai (Stenochlaena Palustris) Extract. Bachelor thesis, Swiss German University.

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Abstract

Kelakai is a type of fern used as a traditional herb that could cure fever, skin diseases, and stomachache. It is found that kelakai possess antioxidant activities. In herbal industry, postharvest and pretreatment processes are needed to preserve the herbs quality. However, postharvest and pretreatment process of kelakai to optimize its antioxidant activity has not been found. In this research, different postharvest and pretreatment process was done in order to optimize the antioxidant activity. Based on the data obtained, drying method has a significant effect towards its antioxidant activity. Moreover, there are two variants of treatment that have the best value by using two antioxidant activity analysis methods, which are DPPH Assay and Total Flavonoid content. It turns out that the variant of 10 cm kelakai that was wrapped in plastic, washed; sun dried and milled has the lowest DPPH IC50 value, which is 33.9335 ppm. Also, for Total Flavonoid Content, it was found that the variant of 10 cm kelakai that was wrapped in banana leaves, unwashed, sun dried and blended has the highest TFC value, which is 39.0275 mg QE/g sample.

Item Type:	Thesis (Bachelor)
Uncontrolled Keywords:	Kelakai; Pretreatment; Postharvest; Antioxidant; Total Flavonoid Content
Subjects:	R Medicine > RS Pharmacy and materia medica > RS160 Plant extracts R Medicine > RV Botanic, Thomsonian, and eclectic medicine T Technology > TP Chemical technology > TP159 Chemical detectors
Divisions:	Faculty of Life Sciences and Technology > Department of Food Technology
Depositing User:	Astuti Kusumaningrum
Date Deposited:	09 Jul 2020 12:47
Last Modified:	09 Jul 2020 12:47
URI:	http://repository.sgu.ac.id/id/eprint/657

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