Chandra, Mega and Puteri, Maria Dewi P. T. Gunawan and Rahmawati, Della (2016) Application of Citrus Essential Oil in Edible Coating to Delay Fresh Tofu Degradation. Bachelor thesis, Swiss German University.

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Abstract

The purpose of this research was to delay the degradation of tofu by utilizing citrus essential oil as natural antimicrobial agent, with edible coating as intermediate media. The commercial essential oil of Citrus limon, Citrus sinensis and Citrus aurantifolia from Semarang, West Java Indonesia extracted by steam distillation was used. Two kinds polymers which were starch based and alginate based were analysed. Alginate based coating solution was chosen due to its better gelation and retention of tofu characteristics. A set of solution of Sodium Alginate 1.29%(w/v), glycerol 1.16% (w/v), 0.025%(w/v) sunflower oil and 0.6% (v/v) citrus limon essential oil and 2%(w/v) Calcium Chloride was used as coating system for fresh tofu. The minimum inhibition concentration (MIC) of Citrus limon essential oil was 0.2% and 0.6%, and minimum bactericidal concentration (MB) was determined 0.6% and >2% against Bacillus sp., and Escherichia coli, respectively. Single-layer coating was chosen for coating application. A batch of control negative, control positive and sample underwent degradation test of 12-hour interval for 48 hours. They were analysed chemically and microbiologically. It was observed that C. limon essential oil can act as a good antimicrobial activity against bacteria, and alginate can act as a good based edible coating solution for bacteria-prone food such as tofu.

Item Type:	Thesis (Bachelor)
Uncontrolled Keywords:	Tofu; Degradation; Citrus; Essential Oil; Edible Coating
Subjects:	T Technology > TP Chemical technology > TP368 Food processing and manufacture T Technology > TP Chemical technology > TP959 Citrus oils T Technology > TX Home economics > TX558 Tempeh
Divisions:	Faculty of Life Sciences and Technology > Department of Food Technology
Depositing User:	Astuti Kusumaningrum
Date Deposited:	02 Oct 2020 14:36
Last Modified:	02 Oct 2020 14:36
URI:	http://repository.sgu.ac.id/id/eprint/901

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