The dissipation behavior of octachlorodipropyl ether (OCDPE) residues in fresh tea shoots and in tea prepared under field conditions was investigated, and the transfer of residues from brewed tea to tea infusion was determined. OCDPE levels in tea shoots, prepared tea, tea infusion, and spent tea leaves were determined using a sensitive and simple method. The dissipation of OCDPE is fairly slow...

This paper reports on the application of total luminescence spectroscopy to discriminate between seven different types of tea. Bottled liquid teas; Oolong tea, Green tea, Houji tea, Japanese black tea and tea leaves (Kenya tea, Assam tea and Ceylon tea). Total luminescence spectra were recorded by measuring the emission spectra in the range 300nm to 700 nm at excitation wavelengths from 250 nm ...

The objectives of this study were to determine the major components in tea leaves and tea extracts and to study the relationship between chemical content and antimutagenic activity of various tea extracts. The amount of catechins in various tea extracts was in the order: green tea (26.7%) > oolong tea (23.2%) > pouchong tea (15.8%) > black tea (4.3%). The amounts of caffeine and phenolic compou...

OBJECTIVES The objective of this study is to determine and compare antibacterial efficacy of aqueous extracts of black, green, and lemon tea of a commercially available brand. MATERIALS AND METHODS The well-diffusion method was used to evaluate the antibacterial efficacy of commercially available black tea, green tea, and lemon tea at three different concentrations (1.5 g, 5 g, and 7.5 g) aga...

Although China and India are the two largest tea-producing countries, the domestication origin and breeding history of the tea plant in these two countries remain unclear. Our previous study suggested that the tea plant includes three distinct lineages (China type tea, Chinese Assam type tea and Indian Assam type tea), which were independently domesticated in China and India, respectively. To d...

Abstract Background Continuous and non-judicial application of synthetic insecticides to control the tea thrips, Scirtothrips bispinosus (Bagnall), one major pests in South India has led certain undesirable issues ecosystem besides presence pesticide residues manufactured tea. Biological agents are immense importance cultivation. The present study was designed isolate Lecanicillium lecanii (Zim...

Tea (Camellia sinensis (L.) Kuntze) is a highly valued plant known for its refreshing taste, medicinal properties, and health benefits. It an evergreen shrub or small tree belonging to the Theaceae family. The productivity quality of tea leaves liquor are strongly influenced by edaphic environmental factors. However, cultivation faces significant challenges due increasing occurrence drought ass...

After water, tea is the world’s most widely consumed beverage. Tea is enjoyed by many people for its cooling and slightly bitter flavor and is known to have many particular health benefits [1-3]. There are several types of tea according to its fermentation processes such as black tea, oolong tea, white tea, yellow tea and green tea [4,5]. Green tea is, like many another type in general and gree...

The Upper Tana River Basin is strategically one of the most critical resource areas of Kenya. The Masinga Reservoir, at the outlet of the basin, provides water and hydroelectric power for 65% of the Nation. Unregulated deforestation and expansion of cultivation practices onto marginal soils in this critical river basin has resulted in significant reservoir siltation, reduced ecosystem function ...

Tea is the most popularly consumed beverage worldwide, also was popular in Indonesia. There are three main types of tea: black tea, green tea and Oolong tea. Oolong tea is produced by a partial oxidation of the leaf, intermediate between the process for green and black tea. Most of people in the world consume Black tea. The possible beneficial health effects of tea are being investigated and ha...