Quality assessment and scavenging activity of Siamese neem flower extracty
Young leaves and flowers of Siamese neem tree (Azadirachta indica A. Juss. var. siamensis Valeton) are commonly consumed as a bitter tonic vegetable. Active antioxidant components in the flowers are rutin and quercetin flavonoids. The aqueous extracts of young flowers collected from 14 different loc...
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th-mahidol.310502018-10-19T11:48:53Z Quality assessment and scavenging activity of Siamese neem flower extracty Worarat Chaisawangwong Wandee Gritsanapan Mahidol University Agricultural and Biological Sciences Biochemistry, Genetics and Molecular Biology Chemistry Young leaves and flowers of Siamese neem tree (Azadirachta indica A. Juss. var. siamensis Valeton) are commonly consumed as a bitter tonic vegetable. Active antioxidant components in the flowers are rutin and quercetin flavonoids. The aqueous extracts of young flowers collected from 14 different locations in Thailand were quantitatively analysed using high-performance liquid chromatography for the contents of rutin and quercetin, and were determined for the loss on drying, heavy metals and pesticide residues, microbial contamination, solubility, chromatographic fingerprints and acute toxicity. The extracts contained rutin and quercetin in the ranges from 388 to 1178mg% dry weight (average 772 mg%), and 1 to 10mg% dry weight (average 5 mg%), respectively. EC50 of the scavenging activity of all extracts was found in the range of 27-133 mgmL-1. Loss on drying of the extracts was less than 7% w/w and no sign of toxicity (LD5045 g kg-1) was found. © 2013 Taylor and Francis. 2018-10-19T04:31:15Z 2018-10-19T04:31:15Z 2013-03-25 Article Natural Product Research. Vol.27, No.4-5 (2013), 394-401 10.1080/14786419.2012.706295 14786427 14786419 2-s2.0-84875130137 https://repository.li.mahidol.ac.th/handle/123456789/31050 Mahidol University SCOPUS https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84875130137&origin=inward |
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Agricultural and Biological Sciences Biochemistry, Genetics and Molecular Biology Chemistry Worarat Chaisawangwong Wandee Gritsanapan Quality assessment and scavenging activity of Siamese neem flower extracty |
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Young leaves and flowers of Siamese neem tree (Azadirachta indica A. Juss. var. siamensis Valeton) are commonly consumed as a bitter tonic vegetable. Active antioxidant components in the flowers are rutin and quercetin flavonoids. The aqueous extracts of young flowers collected from 14 different locations in Thailand were quantitatively analysed using high-performance liquid chromatography for the contents of rutin and quercetin, and were determined for the loss on drying, heavy metals and pesticide residues, microbial contamination, solubility, chromatographic fingerprints and acute toxicity. The extracts contained rutin and quercetin in the ranges from 388 to 1178mg% dry weight (average 772 mg%), and 1 to 10mg% dry weight (average 5 mg%), respectively. EC50 of the scavenging activity of all extracts was found in the range of 27-133 mgmL-1. Loss on drying of the extracts was less than 7% w/w and no sign of toxicity (LD5045 g kg-1) was found. © 2013 Taylor and Francis. |
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Mahidol University |
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Mahidol University Worarat Chaisawangwong Wandee Gritsanapan |
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Article |
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Worarat Chaisawangwong Wandee Gritsanapan |
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Worarat Chaisawangwong |
title |
Quality assessment and scavenging activity of Siamese neem flower extracty |
title_short |
Quality assessment and scavenging activity of Siamese neem flower extracty |
title_full |
Quality assessment and scavenging activity of Siamese neem flower extracty |
title_fullStr |
Quality assessment and scavenging activity of Siamese neem flower extracty |
title_full_unstemmed |
Quality assessment and scavenging activity of Siamese neem flower extracty |
title_sort |
quality assessment and scavenging activity of siamese neem flower extracty |
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2018 |
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https://repository.li.mahidol.ac.th/handle/123456789/31050 |
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1763491608608636928 |