Japanese tea

Yano and N. Morita. Studies on CS121 hypoglycemic constituents of Japanese tea. Yakugaku Zasshi 1988 108(10) ... 

Figure 2. Gas Chromatograms of the Aroma Concentrates from Chinese Longjing Tea and Japanese Tea.

Astringency in green tea (Japanese tea) is due to catechins, which are a kind of condensed tannins. The largest source is various teas derived from the tea plant Camellia sinensis. Catechins have various biological activities,... 

Japanese quince extract. See Japanese quince (Chaenomeles japonica) extract Japanese tea extract. See Tea (Thea sinensis) extract... 

Synonyms Chinese tea extract Japanese tea extract Tea extract Thea sinensis Thea sinensis extract... 

Japanese tea seed oil, tsubaki, comes from Thea japonica. The oil is obtained by either pressing or a combination of expelling and solvent extraction. The fully refined oil is virtually colourless and is very similar to olive oil in composition. 

Tested phenolic-containing products Chinese tea, Indian tea, Japanese tea, instant coffee, decaffeinated coffee, betel nut extracts... 

Ascorbic acid (C) Athlete food, Japanese tea, orange juice, grated radish, grated carrot, vinegar, honey, soybean sauce RP-HPLC Amperometric (GCE) [99]... 

Pongsuwan et al. (44) describe a UHPLC method for the determination of catechins and their metabolites using BEH C18 (150 x 2.1 mm, 1.7 xm) column and a colunm temperature of 40°C. This method has been applied in metabolic profiling of fifty-six Japanese tea samples. BEH C18 chromatographic column (100 x 2.1 mm, 1.7 xm) at 40°C and a 20-min gradient elution program were used by Trautvetter et al. to idenfily thirty-seven phenolic acids and flavonoids in honey samples (45). 

Aoki, S. (1986). Interaction of light and low temperature in depression of photosynthesis in tea leaves. Japanese Journal of Crop Science, 55, 496-503. 

NAKACHi K, SUEMASU K, suGA K, TAKEO T, iMAi K and HIGASHI Y (1998) Influence of drinking green tea on breast cancer malignancy amony Japanese patients , Jpn J Cancer Res, 89, 254-61. 

OGUNI I, CHEN s J, LIN p z and KARA Y (1992) Protection against cancer risk by Japanese green tea , Prev Med, 21, 332-3. 

SAKANAKA s, KIM M, TANiGUCHi M and YAMAMOTO T (1989) Antibacterial substances in Japanese green tea extract against Streptococcus mutans, a cariogenic bacterium , Agric Biol Chem, 53, 2307-11. 

Vitamin C (ascorbic acid) is present in green tea but only traces are found in black tea.112 Five cups of Japanese green tea provide 25 to 30% of the RDA. 

Contrary to the structure similarity of the pheromones secreted by taxonomical related moths, some differences are necessary for their sexual communication systems to play an important role in their reproductive isolation. In addition to further modifications of the various structures, diversity of the lepidopteran sex pheromones is generated by blending multiple components. Innumerable pheromone blends are based not only on combinations of different components but also on variations in the mixing ratio. A pioneer study with Adoxophyes spp. (Tortricidae Tortricinae) had already proposed this concept in the early 1970s. While the smaller tea tortrix (A. honmai) and the Japanese summerfruit tortrix (A. oranafasciata) had been considered to be variant strains with different host preferences in the same species, Tamaki et al. found that females of the former pest insect in the tea garden secreted Z9-14 OAc and Zll-14 OAc in a ratio of 7 4 but females of the latter defoliator of apple trees secreted them in a ratio of 13 4 [127,128]. Furthermore, two other components (Ell-14 OAc and MelO-12 OAc) were subsequently identified from the former species [129]. 

Jo and others (2006) applied this assay to determine the antioxidant properties of methanolic extracts from Japanese apricot in chicken breast meat. Likewise, Pearson and others (1998) assessed two types of Japanese green tea from Japan and two of their active compounds, catechin and epicatechin, for their relative abilities to inhibit the oxidation of LDL. Also, Pearson and others (1999) assessed the ability of compounds in apple juices and extracts from fresh apple to protect LDL. Heinonen and others (1998b) observed that berry phenolics inhibited hexanal formation in oxidized human LDL. 

Kato, M., Gyoten, Y., Sakai-Kato, K., and Toyo oka, T. (2003). Rapid analysis of amino acids in Japanese green tea by microchip electrophoresis using plastic microchip and fluorescence detection.. Chromatogr. A 1013, 183 — 189. 

Occurs naturally in white sandlewood, sour cherries, peppermint leaves (1-10 ppb), tarragon, asparagus shoots, tea leaves, coffee beans, Japanese privet, tomatoes, licorice roots, and African palm oil (Duke, 1992). 

Segi, M. (1975). Tea-gruel as a possible factor for cancer for the esophagus. Gann (Japanese... 

CA149 Nagata, C., M. Kabuto, and H. Shimizu. CAl61 Association of coffee, green tea, and caffeine intakes with serum concentrations of estradiol and sex hormonebinding globulin in premenopausal Japanese women. Nutr Cancer 1998 CA162... 

In another cohort study of a Japanese population, researcher surveyed more than 8000 individuals over 40 years of age on their living habits, including daily consumption of green tea. Results found a negative association between green tea consumption and cancer incidence, especially among females drinking more than 10 cups per day [212]. 

In a epidemiological study of Japanese women, a history of stroke was less common among those who drank more green tea. There was no statistically significant reduction in blood pressure alone among those women who drank more tea [206]. 

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