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Browsing Journal Articles by Author "Wanyoko, J. K."

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Antibacterial and Synergistic Activity of Different Tea Crude Extracts against Antibiotic Resistant S. Aureus, E. Coli and a Clinical Isolate of S. Typhi

Koech, K. R.; Wachira, Francis N.; Ngure, R. M.; Wanyoko, J. K.; Bii, C.; Karori, S. M. (Science Journal Publication, 2013)

The antibacterial and synergistic effects of black, green, white tea and other specialty teas such as purple tea extracts processed from Kenyan tea germplasm were evaluated and compared with extracts from processed teas ...
Antifungal activity of crude tea extracts

Koech, K. R.; Wachira, Francis N.; Ngure, R. M.; Orina, I. A.; Wanyoko, J. K.; Bii, C.; Karori, S. M. (Academic Journals, 2013-05-23)

The tea polyphenols have been shown to possess many medicinal properties including antifungal activity, but there have been few studies regarding antifungal activity. The antifungal activity of ...
Antioxidant capacity of different types of tea products

Wachira, Francis N.; Karori, S. M.; Wanyoko, J. K.; Ngure, R. M. (Academic Journals, 2007-10-04)

In the present study, twelve different types of commercial tea samples were assayed to determine their phenolic composition and antioxidant activity. Reverse phase high performance liquid chromatography using a binary ...
Attenuation of t-Butylhydroperoxide induced oxidative stress in HEK 293 WT cells by tea catechins and anthocyanins

Wachira, Francis N.; Kerio, L. C.; Bend, J. R.; Wanyoko, J. K.; Rotich, M. K. (Academic Journals, 2011-12-31)

The health promoting properties of catechins and anthocyanins have been of great interest to researchers in the recent past due to their significant in vitro and in vivo antioxidant activities. Most research on anthocyanins ...
Characterization of anthocyanins in Kenyan teas: Extraction and identification

Wachira, Francis N.; Kerio, L. C.; Wanyoko, J. K.; Rotich, M. K. (Elsevier, 2012-03)

Characterization and quantification of anthocyanins in selected tea cultivars processed into black (aerated) and green (unaerated) tea products was carried out in this study. The anthocyanins were extracted from tea products ...
Clonal tea response to varying nursery rooting media

Wachira, Francis N.; Kamunya, S. M.; Rotich, S.; Wanyoko, J. K. (2003)
Different types of tea products attenuate inflammation induced in Trypanosoma brucei infected mice

Wachira, Francis N.; Karori, S. M.; Ngure, R. M.; Wanyoko, J. K.; Mwangi, J. N. (Elsevier, 2008-09)

An in vivo study was carried out to determine the effect of different types of Kenyan tea extracts on male Swiss albino mice infected with Trypanosoma brucei brucei isolate KETRI 2710. The isolate produced a similar clinical ...
Extractability of Fluoride into Black Tea Liquors, Kenya

Moseti, K. O.; Wanyoko, J. K.; Kinyanjui, T.; Wachira, Francis N. (2013-05)

Fluoride in food is currently a subject of immense interest globally as it is directly related to health and disease. Tea leaves are rich in fluoride, part of which is released into the tea liquor during the tea making ...
Fatty Acids Residues Composition in the De - Oiled Tea Seed Oil Cakes

Njuguna, D. G.; Wanyoko, J. K.; Kinyanjui, T.; Wachira, Francis N. (Science Journal Publication, 2014)

Studies were conducted on the fatty acids residues levels in the de-oiled tea seed oil cakes of six selected tea cultivars of Kenya. Fatty acids methyl esters were analysed by the use of gas liquid chromatography. De-oiled ...
Fortification of alcoholic beverages (12% v/v) with tea (Camellia sinensis) reduces harmful effects of alcohol ingestion and metabolism in mouse model.

Wachira, Francis N.; Ochanda, S. O.; Rashid, K.; Wanyoko, J. K.; Ngotho, M.; Faraj, A. K.; Onyango, C. A.; Maranga, D. N. (BMJ Publishing Group, 2016-03-22)

Background An animal model was used to study the health benefits inherent in tea fortified alcoholic beverages fed to laboratory mice. Objectives An investigation of the effects of tea fortified alcoholic beverages ...
The fortification of tea with sweeteners and milk and its effect on in vitro antioxidant potential of tea product and glutathione levels in an animal model

Wachira, Francis N.; Korir, M. W.; Wanyoko, J. K.; Ngure, R. M.; Khalid, R. (Elsevier, 2014-02)

Several studies have demonstrated that tea flavonoids protect cells and tissues against free radicals which have been implicated in the etiology of oxidative stress-related disease disorders. However, black tea is commonly ...
Green tea from purple leaf coloured tea clones in Kenya- their quality characteristics

Wachira, Francis N.; Kilela, E. C.; Faraja, A. K.; Wanyoko, J. K.; Mwingirwa, V. (Elsevier, 2013-11)

The Kenyan tea industry wishes to diversify its tea products, and in line with this, anthocyanin – rich teas were developed at the Tea Research Foundation of Kenya. These teas have purple-coloured leaves and the green ...
Mineral Elements in the Kenyan Tea Seed Oil Cake

Njuguna, D. G.; Wanyoko, J. K.; Kinyanjui, T.; Wachira, Francis N. (2013-01)

Studies were conducted on essential and toxic elements in the de-oiled tea seed oil cake in the Kenyan tea clones. They were analyzed for calcium, zinc, magnesium, copper, lead, cadmium and manganese by use of Atomic ...
Neuroprotective Effects of Tea Against Cadmium Toxicity

Karori, S. M.; Areba, G. O.; Ngure, R. M.; Khalid, R.; Maloba, F.; Nyaga, N.; Moseti, K. O.; Ngotho, M.; Wanyoko, J. K.; Wachira, Francis N. (2019)

Background: Cadmium (Cd) is a common pollutant and potential neuro-toxicant to humans. The main treatment for heavy metal toxicity is chelation therapy which is however replete with grave side effects. This study was ...
Plain Black Tea Quality Parameters of Purple Leaf Coloured Tea C lones in Kenya

Kilel, E. C.; Wanyoko, J. K.; Faraj, A. K.; Wachira, Francis N. (2013-07)

A study was conducted at the Tea Research Foundation of Kenya (TRFK) to investigate the plain black tea quality parameters of 12 accessions of purple leaf coloured tea clones in Kenya. The clones were developed in line ...
Quantitative genetic parameters in tea ( Camellia sinensis (L.) O. Kuntze): I. combining abilities for yield, drought tolerance and quality traits

Wachira, Francis N.; Kamunya, S. M.; Pathak, R. S.; Muoki, R. C.; Wanyoko, J. K.; Ronno, W. K.; Sharma, R. K. (Academic Journals, 2009-05)

The combining abilities for yield, drought tolerance and quality related traits in Camellia sinensis were estimated using a 4 x 4 full diallel mating design. There was significant phenotypic variation for the nine ...
Some factors influencing the free fluoride content in black tea infusions

Moseti, K. O.; Kinyanjui, T.; Wanyoko, J. K.; Wachira, Francis N. (2014)

Fluoride is an essential micro-nutrient owing to its role in the prevention of dental caries. Chronic exposure to high levels of the ion (F<sup>-</sup>) results in both dental and skeletal fluorosis. A study was carried ...
Total polyphenols, catechin profiles and antioxidant activity of tea products from purple leaf coloured tea cultivars

Wachira, Francis N.; Kerio, L. C.; Wanyoko, J. K.; Rotich, M. K. (Elsevier, 2013-02)

Black (aerated) and green (unaerated) tea products, processed from 10 green and 18 purple leaf coloured cultivars of Kenyan origin, and two tea products, from the Japanese cultivars, Yabukita and Yutakamidori, were assayed ...

Browsing Journal Articles by Author "Wanyoko, J. K."

Browsing Journal Articles by Author "Wanyoko, J. K."

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