Publications by Nguyen Cong-Hau

Publications by authors named "Nguyen Cong-Hau"

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Characteristics and Relationships between Total Polyphenol and Flavonoid Contents, Antioxidant Capacities, and the Content of Caffeine, Gallic Acid, and Major Catechins in Wild/Ancient and Cultivated Teas in Vietnam.

Tran-Thi Nhu-Trang Quoc-Duy Nguyen Nguyen Cong-Hau Le-Thi Anh-Dao Philippe Behra

Molecules

April 2023

Article Synopsis

Vietnam has a rich history of tea cultivation, but there is still limited scientific data on the characteristics and qualities of Vietnamese teas.
Chemical analyses of 28 Vietnamese teas revealed that green and raw Pu'erh teas from North Vietnam had higher levels of total polyphenols and flavonoids than oolong and black teas from South Vietnam.
Strong correlations were found between chemical properties and antioxidant activities, with significant distinctions noted in flavors and compositions based on tea processing methods and geographic origins.

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Smartphone-based digital images as a low-cost and simple colorimetric approach for the assessment of total phenolic contents in several specific Vietnamese dried tea products and their liquors.

Do Minh-Huy Le-Thi Anh-Dao Nguyen Thanh-Nho Le Nhon-Duc Nguyen Cong-Hau

Food Chem

February 2023

The total phenolic contents (TPCs) represent the bioactive substances and antioxidant capacities of flora products. The present study employed digital images from a smartphone to determine the TPCs in tea products and their liquors. Various parameters related to the portable home-made colorimetric analysis box design were optimized to achieve the most favorable capturing condition.

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