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Browsing Journal Articles by Author "Karori, Stephen"

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Determination of Residual Catechins, Polyphenolic Contents and Antioxidant Activities of Developed Theaflavin-3,3’-Digallate Rich Black Teas

Wachira, Francis N.; Kimutai, Samuel; Wanyoko, John; Kinyanjui, Thomas; Karori, Stephen; Muthiani, Augustine (Scientific Research Publishing, 2016-03)

This study was carried out to characterize total residual catechins and their fractions, polyphenolic contents and antioxidant activities of black teas enriched with high levels of theaflavin-3,3’-digallate. The made teas ...
Influence of Geographical Regions on Catechin and Caffeine Levels in Tea (Camellia sinensis)

Wachira, Francis N.; Mutuku, Augustine; Wanyoko, John; Kamunya, Samson; Chalo, Richard; Kimutai, Samuel; Moseti, Kelvin; Karori, Stephen (Scientific Research Publishing, 2016)

This study aimed at investigating the influence of different growing conditions in two regions, Timbilil and Kangaita, on the levels of catechins and caffeine. Fresh leaf samples of 60 clones cultivated in both sites were ...
Optimization of Aeration Time in the Development Theaflavin-3,3’-Digallate Rich Black Teas

Wachira, Francis N.; Wanyoko, John K.; Kinyanjui, Thomas; Karori, Stephen; Muthiani, Augustine (Scientific Research Publishing, 2015-12)

This study involved the selection of 11 cultivars out of 201 screened cultivars of fresh green and purple coloured tea leaves for use in the manufacture of black teas with optimized antioxidant activities. Individual ...
Potential Use of Kenya Tea Cultivars in Development of High Value Diversified Products

Wachira, Francis N.; Muthiani, Mutuku A.; Wanyoko, John K.; Kamunya, Samson M.; Chalo, Richard M.; Kimutai, Samuel; Khalid, Rashid; Karori, Stephen (2016)

Tea industry in Kenya contributes to the economy by being the largest agribusiness and a major foreign exchange earner. However, significant revenue is lost when tea is sold in undiversified form. This has created a need ...

Browsing Journal Articles by Author "Karori, Stephen"

Browsing Journal Articles by Author "Karori, Stephen"

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