Putera, Denny Tjetjep (2013) Characterization of edible film from lesser yam (dioscorea esculenta lour. burkill) starch and its utilization as edible coating to strawberry (fragaria ananassa). Bachelor thesis, Universitas Pelita Harapan.
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Abstract
It was shown before that lesser yam (Dioscorea esculenta) polysaccharides
could be utilized as basic material to create starch-based edible film. This study
was aimed to determine highest lesser yam starch extraction yield and three best
concentrations of lesser yam starch and plasticizer in producing good mechanical
and physical characteristics of edible film, i.e. tensile strength, elongation,
thickness, and water vapor transmission rate (WVTR). The application of edible
coating was also done to determine the shelf life of strawberry at room
temperature storage (24-26 C, RH 52%) and cold storage (4-5 C). Lesser yam
starch was extracted using different concentrations of sodium metabisulfite (0,
0.02, 0.04, and 0.06%). Extraction using 0.02% sodium metabisulfite exhibited the
highest yield (65.33% db) and the purest (98.50%) starch powder. Combinations
of lesser yam starch (3.5, 4.5, 5.5, and 6.5%) and glycerol as plasticizer (1, 2, and
3%) was used to prepare edible film. Three best combinations were selected as the
best formulation representing each physical and mechanical characteristic. The
combination of 4.5%-2% was selected due to the low WVTR, 6.5%-2% due to the
high tensile strength and elongation, and 4.5%-3% due to the intermediate
physical and mechanical characteristics. These combinations were formulated and
applied to strawberry fruits which were then stored at room temperature (24-
26 C, RH 52%) and cold storage (4-5 C) alongside with uncoated strawberries
which served as control. Coated strawberry (all concentrations) stored in room
temperature had three days shelf life while control had less than 36 h shelf life.
Coated strawberries by combinations of 6.5% starch-2% plasticizer, 4.5%-3%,
and 4.5%-2% in cold storage exhibited shelf life of 20, 24, and 26 days,
respectively, whereas the control in cold storage had only 10-day shelf life.
Item Type: | Thesis (Bachelor) |
---|---|
Creators: | Creators NIM Email ORCID Putera, Denny Tjetjep NIM03420090007 DENNY.TJETJEP@GMAIL.COM UNSPECIFIED |
Contributors: | Contribution Contributors NIDN/NIDK Email Thesis advisor Pokatong, Wilbur Donald Raymond NIDN0002106402 UNSPECIFIED Thesis advisor Gultom, Sisi Patricia L. A. UNSPECIFIED UNSPECIFIED |
Additional Information: | SK 34-09 PUT c |
Uncontrolled Keywords: | lesser yam starch ; edible film ; edible coating ; strawberry |
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 |
Depositing User: | Users 17 not found. |
Date Deposited: | 16 Oct 2018 07:40 |
Last Modified: | 05 Oct 2021 07:15 |
URI: | http://repository.uph.edu/id/eprint/1350 |