Amadea, Gracia (2021) Pengaruh jenis daun dan konsentrasi etanol terhadap aktivitas inhibisi α-glukosidase dan antioksidan ekstrak daun belimbing = Effect of leaves species and ethanol concentration on α-glucosidase and antioxidant activities of star fruit leaves extract. Bachelor thesis, Universitas Pelita Harapan.
Text (Title)
Title.pdf Restricted to Repository staff only Available under License Creative Commons Attribution Non-commercial Share Alike. Download (821kB) |
||
|
Text (Abstract)
Abstract.pdf Available under License Creative Commons Attribution Non-commercial Share Alike. Download (91kB) | Preview |
|
|
Text (ToC)
ToC.pdf Available under License Creative Commons Attribution Non-commercial Share Alike. Download (113kB) | Preview |
|
|
Text (Chapter1)
Chapter1.pdf Available under License Creative Commons Attribution Non-commercial Share Alike. Download (103kB) | Preview |
|
Text (Chapter2)
Chapter2.pdf Restricted to Registered users only Available under License Creative Commons Attribution Non-commercial Share Alike. Download (230kB) |
||
Text (Chapter3)
Chapter3.pdf Restricted to Registered users only Available under License Creative Commons Attribution Non-commercial Share Alike. Download (145kB) |
||
Text (Chapter4)
Chapter4.pdf Restricted to Registered users only Available under License Creative Commons Attribution Non-commercial Share Alike. Download (151kB) |
||
Text (Chapter5)
Chapter5.pdf Restricted to Registered users only Available under License Creative Commons Attribution Non-commercial Share Alike. Download (78kB) |
||
|
Text (Bibliography)
Bibliography.pdf Available under License Creative Commons Attribution Non-commercial Share Alike. Download (105kB) | Preview |
|
Text (Appendices)
Appendices.pdf Restricted to Repository staff only Available under License Creative Commons Attribution Non-commercial Share Alike. Download (632kB) |
Abstract
Daun belimbing memiliki kandungan senyawa bioaktif seperti alkaloid, fenolik, dan flavonoid yang memiliki fungsi sebagai antioksidan dan inhibitor α-glukosidase. Tujuan dari penelitian ini adalah untuk memanfaatkan ekstrak daun belimbing sebagai antioksidan dan inhibitor α-glukosidase. Penelitian pendahuluan dilakukan untuk mengetahui karakteristik daun belimbing dengan uji kadar air. Pada penelitian utama dilakukan ekstraksi dengan metode maserasi pada 2 jenis daun belimbing (A. carambola L. dan A. bilimbi L.) menggunakan pelarut etanol dengan konsentrasi berbeda (50%, 70%, 96%). Pada seluruh ekstrak yang dihasilkan dilakukan analisis rendemen, total fenolik, total flavonoid, aktivitas antioksidan, dan aktivitas inhibisi α-glukosidase. Ekstrak daun belimbing manis (A. carambola L.) dengan pelarut etanol 96% memiliki nilai rendemen tertinggi, yaitu sebesar 11,38±0,90%. Ekstrak etanol 96% daun belimbing manis (A. carambola L.) dan daun belimbing wuluh (A. bilimbi L.), serta ekstrak etanol 70% daun belimbing manis (A. carambola L,) memiliki nilai total fenolik tertinggi, yaitu sebesar 142,07±4,50 mg GAE/g, 134,81±4,08 mg GAE/g ekstrak, dan 139,52±6,38 mg GAE/g ekstrak secara berurutan. Ekstrak daun belimbing wuluh (A. bilimbi L.) dengan pelarut etanol 96% memiliki nilai total flavonoid tertinggi sebesar 48,22±0,95 mg QE/g ekstrak. Daun belimbing manis (A. carambola L.) dan daun belimbing wuluh (A. bilimbi L.) yang diekstraksi dengan etanol 96% menghasilkan ekstrak daun belimbing dengan aktivitas antioksidan dan inhibisi α-glukosidase terbaik. Ekstrak etanol 96% daun belimbing manis (A. carambola L.) dan daun belimbing wuluh (A. bilimbi L.) memiliki aktivitas antioksidan dengan nilai IC50 sebesar 111,07±5,98 ppm dan 123,49±4,52 ppm secara berurutan, serta memiliki aktivitas inhibisi α-glukosidase dengan nilai IC50 sebesar 180,72±8,43 ppm dan 205,45±10,42 ppm secara berurutan. / Star fruit leaves contain bioactive compounds such as alkaloid, phenolic, and flavonoid which can act as antioxidant and α-glucosidase inhibitor. The aim of this study was to utilize star fruit leaves extract as antioxidant and α-glucosidase inhibitor. The preliminary stage was done to characterize the star fruit leaves through moisture content analysis. The main research was done by extraction using maceration method on 2 species of star fruit leaves (A. carambola L. and A. bilimbi L.) with different concentrations of ethanol solvent (50%, 70%, 96%). All extracts obtained were analyzed for their yield, total phenolic, total flavonoid, antioxidant activity, and α-glucosidase inhibitory activity properties. Sweet star fruit leaves (A. carambola L.) extracted using 96% ethanol resulted the highest yield at 11,38±0,90%. Sweet star fruit leaves (A. carambola L.) and wuluh star fruit leaves (A. bilimbi L.) extracted using 96% ethanol, also sweet star fruit leaves (A. carambola L.) extracted using 70% ethanol resulted in the highest total phenolic content at 142,07±4,50 mg GAE/g extract, 134,81±4,08 mg GAE/g extract, and 139,52±6,38 mg GAE/g extract respectively. Wuluh star fruit leaves (A. bilimbi L.) extracted using 96% ethanol resulted the highest total flavonoid at 48,22±0,95 mg QE/g extract. Sweet star fruit leaves (A. carambola L.) and wuluh star fruit leaves (A. bilimbi L.) extracted using 96% ethanol resulted in the highest antioxidant and α-glucosidase inhibitory activities. Sweet star fruit leaves (A. carambola L.) and wuluh star fruit leaves (A. bilimbi L.) 96% ethanol extracts have antioxidant activities with IC50 values of 111,07±5,98 ppm and 123,49±4,52 ppm respectively, and α-glucosidase inhibitory activities with IC50 values of 180,72±8,43 ppm and 205,45±10,42 ppm respectively.
Item Type: | Thesis (Bachelor) | ||||||||
---|---|---|---|---|---|---|---|---|---|
Creators: |
|
||||||||
Contributors: |
|
||||||||
Uncontrolled Keywords: | ekstrak daun belimbing; konsentrasi etanol; fenolik; flavonoid; antioksidan; inhibisi α-glukosidase | ||||||||
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: | Gracia Amadea | ||||||||
Date Deposited: | 10 Feb 2021 06:04 | ||||||||
Last Modified: | 10 Feb 2021 06:04 | ||||||||
URI: | http://repository.uph.edu/id/eprint/16856 |
Actions (login required)
View Item |