Anugerah, Sarah (2012) Characteristics and antioxidant activity of low calorie soursop (annona muricata l.) jam = Karakteristik dan aktivitas antioksidan selai sirsak (annona muricata l.) rendah kalori. Bachelor thesis, Universitas Pelita Harapan.
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Abstract
Soursop (Annona muricata L.) is commonly found in Indonesia and has high antioxidant and nutrient content. Utilization of soursop is still limited, therefore low calorie jam can increase the diversivication of processed products from soursop. Soursop has the appropriate characteristics to be made into jam, because it has pectin, organic acids, and sugar content. Fresh Soursop fruit has 5,38 mg/ml IC50 concentration, 90,76 mgGAE/100 g phenolic concentration, 1,12 mgQE/100 g flavonoid concentration, and 20,42 g/100 g vitamin C concentration. In this research, different types of sweeteners and different concentration of pectin are used. Sweetener used in this research are acesulfame-K, aspartame, and combination of both sweeteners. Low methoxyl pectin concentration used are 0,75%, 1%, and 1,25%. Different cooking temperatures and time are also applied in jam making, in order to find jam with the highest antioxidant content. Temperature used are 85oC, 90oC, and 95oC and will be maintained for 1, 2, and 3 minutes for each treatment. Parameters used to find soursop jam with the best formulation are organoleptic parameter (5-scale hedonic test), physical and chemical parameters (total dissolved solid, sucrose content, pH, degree of whiteness, viscosity, syneresis, and consistency), and antioxidant parameters (IC50, phenolic, flavonoid, and vitamin C concentrations). Based on this research, jam with the best formulation is jam with aspartame sweetener and 1% low methoxyl pectin. The best cooking temperature and time used to maintain the highest antioxidant concentration is 85oC for 1 minute.
Item Type: | Thesis (Bachelor) | ||||||||||||
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Additional Information: | SK 34-08 ANU k | ||||||||||||
Uncontrolled Keywords: | Soursop; Annona muricata L.; low calorie jam; antioxidant | ||||||||||||
Subjects: | T Technology > TP Chemical technology > TP368-456 Food processing and manufacture | ||||||||||||
Divisions: | University Subject > Current > Faculty/School - UPH Karawaci > Faculty of Science and Technology > Food Technology Current > Faculty/School - UPH Karawaci > Faculty of Science and Technology > Food Technology |
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Depositing User: | Users 3 not found. | ||||||||||||
Date Deposited: | 16 Oct 2018 08:06 | ||||||||||||
Last Modified: | 13 Aug 2021 04:50 | ||||||||||||
URI: | http://repository.uph.edu/id/eprint/1921 |
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