Junio, Ivan (2015) Characterization of column-fractionated rambutan (nephelium lappaceum l.) fruit peel extracts as a potential fermentation inhibitor in the preparation of apple cider. Bachelor thesis, Universitas Pelita Harapan.
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Abstract
The rambutan (Nephelium lappaceum L.) peel extract has been reported to
contain bioactive compounds that promote beneficial effects such as antioxidant
and antimicrobial activities. This research was aimed to investigate the rambutan
peel extract as a potential fermentation inhibitor in the preparation of cider.
Rambutan peels were extracted with ethyl acetate with the ratio of 1 peel : 3 ethyl
acetate, and it was followed by column chromatography preparation by three
types of eluent having different polarities, which were ethyl-acetate, ethanol, and
methanol. The vacuum-concentrated rambutan peel extracts from 675 ml of
fractions were then applied in cider and fermented for 21 days. Physicochemical
properties of the cider including alcohol content, pH, total titratable acidity (TTA),
total dissolved solids (TDS), and total reducing sugar (TRS) were observed every
three days. The addition of methanolic extract produced low alcohol content of
cider, with results of 3.21±0.04% alcohol after 21 d of fermentation. On the other
hand, cider with ethanolic and ethyl acetate extracts contributed no inhibitory
effect towards cider fermentation, producing alcohol content of 9.21±1.30% and
8.82±1.59%, respectively, comparable to the alcohol content of the control cider
which was 8.48±0.71% after 21 d of fermentation. Methanolic fractionated
concentrated extract might be utilized as a natural fermentation inhibitor applied
to the process of controlling alcohol production in certain alcoholic fermentation.
Item Type: | Thesis (Bachelor) |
---|---|
Creators: | Creators NIM Email ORCID Junio, Ivan NIM03420100069 IVANJUNIO2906@HOTMAIL.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 34-10 JUN c |
Uncontrolled Keywords: | alcoholic fermentation ; cider ; fermentation inhibitor ; column chromatography ; physicochemical properties ; rambutan peel |
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 08:00 |
Last Modified: | 16 Sep 2021 08:08 |
URI: | http://repository.uph.edu/id/eprint/1759 |