Lausane, Aurelia Clara (2018) Aktivitas inhibisi α-glukosidase pada minuman jeli kulit melinjo (gnetum gnemon l.) = Activity of α-glucosidase inhibition on jelly drink of melinjo peels (gnetum gnemon l.). Bachelor thesis, Universitas Pelita Harapan.
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Abstract
Melinjo peels (Gnetum gnemon L.) has stilbenoid (resveratrol and
piceatannol) compounds that can act as α-glucosidase inhibitors. The main
objective of this study was to utilize melinjo peels in the preparation of jelly drinks
that are expected to have the ability to inhibit α-glucosidase. In preliminary stage,
α-glucosidase inhibition, antioxidant activity, total phenolic, and total flavonoids in
red, yellow, and green melinjo peels juice was analyzed. IC50 of α-glucosidase
inhibition activity in red, yellow, and green melinjo peels juice is 24.264 ppm,
22.393 ppm, and 63.966 ppm. Jelly drink are made using ratio of melinjo peels juice
to water consisting of five levels (30:70, 40:60, 50:50, 60:40, and 70:30) and
hydrocoloid concentration consisting of three levels (0.15 %, 0.20%, and 0.25%).
Organoleptic (scoring and hedonic), color, texture, pH, total soluble solid, and
syneresis tests were done to all samples of jelly drink. The selected jelly drink is
the one with 50:50 ratio of yellow melinjo peels juice to water and concentration of
hydrocoloid of 0.20%. With this treatment, the jelly drink has IC50 α-glucosidase
inhibition of 30.974 ppm, antioxidant activity of 12.4054 mg VCE/100mL,
phenolic total of 0.4037 mg GAE/g, flavonoid total of 0.0173 mg QE/g, moisture
content of 98.14%, ash content of 0.08%, protein content of 0.39%, fat content of
0.10%, and carbohydrate of 1.30%. / Kulit melinjo (Gnetum gnemon L.) memiliki senyawa stilbenoid, yaitu
resveratrol dan piceatanol yang dapat berperan sebagai penghambat α-glukosidase.
Tujuan utama dalam penelitian ini adalah untuk memanfaatkan kulit melinjo pada
pembuatan minuman jeli yang diharapkan memiliki kemampuan untuk
menghambat α-glukosidase. Dilakukan pengujian terhadap inhibisi α-glukosidase,
aktivitas antioksidan, total fenolik, dan total flavonoid pada sari kulit melinjo
merah, kuning, dan hijau. Nilai IC50 inhibisi α-glukosidase pada sari kulit melinjo
merah, kuning, dan hijau adalah sebesar 24.264 ppm, 22.393 ppm, dan 63.966 ppm.
Minuman jeli dibuat dengan menggunakan rasio sari kulit melinjo:air yang terdiri
dari lima level (30:70, 40:60, 50:50, 60:40, dan 70:30) dan konsentrasi hidrokoloid
yang terdiri dari tiga level (0,15%, 0,20%, dan 0,25%). Semua sampel minuman jeli
dilakukan uji organoleptik (skoring dan hedonik), warna, tekstur, pH, total padatan
terlarut, dan sineresis. Minuman jeli terpilih menggunakan rasio sari kulit melinjo
kuning:air 50:50 dan konsentrasi hidrokoloid sebesar 0,20%. Dengan perlakuan ini,
minuman jeli memiliki nilai IC50 inhibisi α-glukosidase sebesar 30.974 ppm,
aktivitas antioksidan sebesar 12,4054 mg VCE/100mL, total fenolik sebesar 0,4037
mg GAE/g, total flavonoid sebesar 0,0173 mg QE/g, kadar air sebesar 98,14%,
kadar abu sebesar 0,08%, kadar protein sebesar 0,39%, kadar lemak sebesar 0,10%, dan karbohidrat sebesar 1,30%.
Item Type: | Thesis (Bachelor) |
---|---|
Creators: | Creators NIM Email ORCID Lausane, Aurelia Clara NIM00000008078 CLARA.ACLARALA@GMAIL.COM UNSPECIFIED |
Contributors: | Contribution Contributors NIDN/NIDK Email Thesis advisor Siregar, Tagor M NIDN0304016902 UNSPECIFIED |
Additional Information: | SK 34-14 LAU a |
Uncontrolled Keywords: | α-glucosidase; antioxidant activity; flavonoids; jelly drink; melinjo peels (Gnetum gnemon L.); phenolic |
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: | 23 Jun 2020 17:46 |
Last Modified: | 21 Sep 2021 07:42 |
URI: | http://repository.uph.edu/id/eprint/8919 |