Sunardi, Jennifer and Santoso, Filiana and Puteri, Maria Dewi P. T. Gunawan (2018) Development Of A Ready-To-Drink Functional Beverage With A-Glucosidase Inhibitory Activity From Black Tea, Lemongrass (Cymbopogon Citratus) And Ginger (Zingiber Officinale Roscoe). Bachelor thesis, Swiss German University.

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Abstract

Ready-to-drink beverage from black tea (BT), Cymbopogon citratus (CC) and Zingiber officinale Roscoe (ZO) were developed based on their α-glucosidase inhibitory (AGI) activities and sensory acceptance. AGI was evaluated using in vitro enzymatic assay while sensory acceptance were evaluated using affective sensory tests. Evaluation of their aqueous extracts showed that dried CC and ZO have higher yield (3.4%, 2.7%, respectively), though not necessarily have better AGI activity (IC50 24.50 mg/ml, IC50 16.61 mg/ml) compared to the fresh CC and ZO (2.1%, 1.8%, IC50 17.93 mg/ml, IC50 >47.00 mg/ml, respectively). Evaluation of combined extract showed additive and synergistic effect. Formula of the combination were selected based on sensory acceptance resulting in beverage containing 66% BT, 25% CC and 9% ZO. The selected formula showed stability of AGI activity, pH, °Brix value at 4°C in coherent to the lower growth of microbial count compared to those stored at 25°C. The selected formula was able to meet the Indonesian National Standard except for the microbial (total plate count, Coliform bacteria and E. Coli) and heavy metal (Pb) contaminants.

Item Type:	Thesis (Bachelor)
Uncontrolled Keywords:	Lemongrass; Ginger; Black Tea; Cymbopogon citratus; Zingiber Officinale Roscoe
Subjects:	Q Science > QK Botany > QK495 Lemongrass R Medicine > RM Therapeutics. Pharmacology > RM666 Herbs--Therapeutic use T Technology > TP Chemical technology > TP500 Fermentation industries. Beverages. Alcohol
Divisions:	Faculty of Life Sciences and Technology > Department of Food Technology
Depositing User:	Astuti Kusumaningrum
Date Deposited:	30 May 2020 09:25
Last Modified:	30 May 2020 09:25
URI:	http://repository.sgu.ac.id/id/eprint/658

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