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Effect of sencha (green tea) and silver needle (white tea) addition on the antioxidant activity of probiotic yogurt

In this study, antioxidants were extracted from two different types of tea, green tea (Sencha) and white tea (Silver Needle) by using infusion extraction method. The extracted antioxidants were tested with self-made yogurt. The main objectives of this study were to analyze the total phenolic content...

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Main Authors: Razali, Nor Faizah, Sou, Pui Chia
Other Authors: Mohd. Fauzi, Noor Akhmazillah
Format: Book Section
Language:English
Published: Penerbit UTHM 2017
Subjects:
TP248.13-248.65 Biotechnology
Online Access:http://eprints.uthm.edu.my/4486/1/Chapter%203_BFPP_S1.pdf
http://eprints.uthm.edu.my/4486/
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spelling my.uthm.eprints.44862022-01-16T06:32:28Z http://eprints.uthm.edu.my/4486/ Effect of sencha (green tea) and silver needle (white tea) addition on the antioxidant activity of probiotic yogurt Razali, Nor Faizah Sou, Pui Chia TP248.13-248.65 Biotechnology In this study, antioxidants were extracted from two different types of tea, green tea (Sencha) and white tea (Silver Needle) by using infusion extraction method. The extracted antioxidants were tested with self-made yogurt. The main objectives of this study were to analyze the total phenolic content of the extracted antioxidants from two different types of teas and to observe the shelf life of the self-made yogurt mix when added with the extracted antioxidant. The extracted antioxidants (natural antioxidant) were also compared with the synthetic antioxidant, butylated hydroxyanisole (BHA). In TPC test, the synthetic antioxidant, BHA extract (10103 μg GAE/g ± 0.006403) has the highest content of polyphenol followed by Sencha (8636 μg GAE/g ± 0.03607) and Silver Needle (5787 μg GAE/g ± 0.02759) teas extracts. In DPPH test, the scavenging activity of BHA extract (97.37 % ± 0.001414) was shown the highest values compare to the Sencha (94.03 % ± 0.001414) and Silver Needle (89.78 % ± 0.0389) tea extracts. After the characterization, the extracted antioxidants from Sencha, Silver Needle teas and synthetic antioxidant were incorporated in yogurt as preservatives. The yogurt samples with extracted and synthetic antioxidants were undergone another chemical analysis of yogurt’s lipid which were PV and AOA test. Based on AOA method, the overall of the BHA applied in self-made yogurt shown the highest antioxidant activity value followed by Sencha tea and Silver Needle tea extracts. By using PV method, BHA antioxidant shown the lowest peroxide value followed by Sencha tea and Silver Needle tea extracts. In conclusion, Sencha, Silver Needle teas and BHA were successfully employed to enhance the antioxidant properties of yogurt and provide sustained antioxidants during 28 days of storage. Penerbit UTHM Mohd. Fauzi, Noor Akhmazillah Mohd. Kassim, Angzzas Sari Razali, Nor Faizah Mansur, Sity Aishah 2017 Book Section PeerReviewed text en http://eprints.uthm.edu.my/4486/1/Chapter%203_BFPP_S1.pdf Razali, Nor Faizah and Sou, Pui Chia (2017) Effect of sencha (green tea) and silver needle (white tea) addition on the antioxidant activity of probiotic yogurt. In: Biotechnology in Food Properties and Processing. Series1. Penerbit UTHM, Batu Pahat, Johor, pp. 19-26. ISBN 9789670764931
institution Universiti Tun Hussein Onn Malaysia
building UTHM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tun Hussein Onn Malaysia
content_source UTHM Institutional Repository
url_provider http://eprints.uthm.edu.my/
language English
topic TP248.13-248.65 Biotechnology
spellingShingle TP248.13-248.65 Biotechnology
Razali, Nor Faizah
Sou, Pui Chia
Effect of sencha (green tea) and silver needle (white tea) addition on the antioxidant activity of probiotic yogurt
description In this study, antioxidants were extracted from two different types of tea, green tea (Sencha) and white tea (Silver Needle) by using infusion extraction method. The extracted antioxidants were tested with self-made yogurt. The main objectives of this study were to analyze the total phenolic content of the extracted antioxidants from two different types of teas and to observe the shelf life of the self-made yogurt mix when added with the extracted antioxidant. The extracted antioxidants (natural antioxidant) were also compared with the synthetic antioxidant, butylated hydroxyanisole (BHA). In TPC test, the synthetic antioxidant, BHA extract (10103 μg GAE/g ± 0.006403) has the highest content of polyphenol followed by Sencha (8636 μg GAE/g ± 0.03607) and Silver Needle (5787 μg GAE/g ± 0.02759) teas extracts. In DPPH test, the scavenging activity of BHA extract (97.37 % ± 0.001414) was shown the highest values compare to the Sencha (94.03 % ± 0.001414) and Silver Needle (89.78 % ± 0.0389) tea extracts. After the characterization, the extracted antioxidants from Sencha, Silver Needle teas and synthetic antioxidant were incorporated in yogurt as preservatives. The yogurt samples with extracted and synthetic antioxidants were undergone another chemical analysis of yogurt’s lipid which were PV and AOA test. Based on AOA method, the overall of the BHA applied in self-made yogurt shown the highest antioxidant activity value followed by Sencha tea and Silver Needle tea extracts. By using PV method, BHA antioxidant shown the lowest peroxide value followed by Sencha tea and Silver Needle tea extracts. In conclusion, Sencha, Silver Needle teas and BHA were successfully employed to enhance the antioxidant properties of yogurt and provide sustained antioxidants during 28 days of storage.
author2 Mohd. Fauzi, Noor Akhmazillah
author_facet Mohd. Fauzi, Noor Akhmazillah
Razali, Nor Faizah
Sou, Pui Chia
format Book Section
author Razali, Nor Faizah
Sou, Pui Chia
author_sort Razali, Nor Faizah
title Effect of sencha (green tea) and silver needle (white tea) addition on the antioxidant activity of probiotic yogurt
title_short Effect of sencha (green tea) and silver needle (white tea) addition on the antioxidant activity of probiotic yogurt
title_full Effect of sencha (green tea) and silver needle (white tea) addition on the antioxidant activity of probiotic yogurt
title_fullStr Effect of sencha (green tea) and silver needle (white tea) addition on the antioxidant activity of probiotic yogurt
title_full_unstemmed Effect of sencha (green tea) and silver needle (white tea) addition on the antioxidant activity of probiotic yogurt
title_sort effect of sencha (green tea) and silver needle (white tea) addition on the antioxidant activity of probiotic yogurt
publisher Penerbit UTHM
publishDate 2017
url http://eprints.uthm.edu.my/4486/1/Chapter%203_BFPP_S1.pdf
http://eprints.uthm.edu.my/4486/
_version_ 1738581256582463488
score 13.211869

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