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White Tea
White tea may refer to one of several styles of tea which generally feature young or minimally processed leaves of the ''Camellia sinensis'' plant. Currently there is no generally accepted definition of white tea and very little international agreement; some sources use the term to refer to tea that is merely dried with no additional processing, some to tea made from the buds and immature tea leaves picked shortly before the buds have fully opened and allowed to wither and dry in natural sun, while others include tea buds and very young leaves which have been steamed or fired before drying. Most definitions agree, however, that white tea is not rolled or oxidized, resulting in a flavor characterized as "lighter" than most green or traditional black teas. In spite of its name, sweet, brewed white tea is pale yellow. Its name derives from the fine silvery-white hairs on the unopened buds of the tea plant, which give the plant a whitish appearance. The unopened buds are used for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bai Hao Yinzhen Tea
BAI or Bai may refer to: BAI Organizations *BAI Communications, telecommunications infrastructure company *BAI (organization), professional organization for financial services in the United States *Badminton Association of India, India's governing body for badminton *Banco Angolano de Investimentos, a bank in Angola *Board of Audit and Inspection, supreme audit institution of South Korea *Brittany Ferries, a French shipping company *Broadcasting Authority of Ireland, regulator of broadcasting in Ireland *Bureau of Animal Industry, formerly an agency of the United States Department of Agriculture *WBAI, a listener-supported radio station in New York City Science *Beck Anxiety Inventory, a psychological assessment tool *Body adiposity index, a method of measuring body fat in humans *Brain-specific angiogenesis inhibitor 1 Other uses * BAI (file format), file format for performing electronic cash management balance reporting * BA-I, a Soviet armoured car * Battlefield air ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tea Leaf Grading
In the tea industry, tea leaf grading is the process of evaluating products based on the quality and condition of the tea leaves themselves. The highest grades for Western and South Asian teas are referred to as "orange pekoe", and the lowest as "fannings" or "dust". Pekoe tea grades are classified into various qualities, each determined by how many of the adjacent young leaves (two, one, or none) were picked along with the leaf buds. Top-quality pekoe grades consist of only the leaf buds, which are picked using the balls of the fingertips. Fingernails and mechanical tools are not used, to avoid bruising. Certain grades of leaf are better suited to certain varieties of tea. For example, most white tea is processed from the buds or shoots of the tea plant. When crushed to make bagged teas, the tea is referred to as "broken", as in "broken orange pekoe" ("BOP"). These lower grades include fannings and dust, which are tiny remnants created in the sorting and crushing processes. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CRC Press
The CRC Press, LLC is an American publishing group that specializes in producing technical books. Many of their books relate to engineering, science and mathematics. Their scope also includes books on business, forensics and information technology. CRC Press is now a division of Taylor & Francis, itself a subsidiary of Informa. History The CRC Press was founded as the Chemical Rubber Company (CRC) in 1903 by brothers Arthur, Leo and Emanuel Friedman in Cleveland, Ohio, based on an earlier enterprise by Arthur, who had begun selling rubber laboratory aprons in 1900. The company gradually expanded to include sales of laboratory equipment to chemists. In 1913 the CRC offered a short (116-page) manual called the ''Rubber Handbook'' as an incentive for any purchase of a dozen aprons. Since then the ''Rubber Handbook'' has evolved into the CRC's flagship book, the '' CRC Handbook of Chemistry and Physics''. In 1964, Chemical Rubber decided to focus on its publishing ventures ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silver Needle Tea
Baihao Yinzhen (; pronounced ), also known as White Hair Silver Needle, is a white tea produced in Fujian Province in China. Silver Needle or Bai Hao Yin Zhen or usually just Yin Zhen is the Chinese type of white tea. Amongst white teas, this is the most expensive variety and the most prized, as only top buds ( leaf shoot) of the camellia sinensis plant are used to produce the tea.陳宗懋，中國茶經，pp 236，上海文化出版社，1992 Genuine Silver Needles are made from cultivars of the ''Da Bai'' (Large White) tea tree family. There are other productions that look similar with downy leaf shoots but most are green teas, and as green teas, they taste differently and have a different biochemical potency than the genuine white tea Silver Needle.袁弟順，中國白茶，廈門大學出版社，2006 It is commonly included among China's famous teas. Possible origins In the early years of Jiaqing in the Qing Dynasty (AD 1796), Baihao Yinzhen was successfully cultivated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shou Mei Tea
Shoumei (; Standard Chinese pronunciation ) is a white tea that is produced from naturally withered upper leaf and tips, with a stronger flavor reminiscent of lighter oolong teas. It is mostly grown in Fujian Province and Guangxi Province in China. Because it is plucked later than Bai Mudan, the tea may be darker in color, but it should still have a proportionate green color. Some lower grades of Shou Mei may be golden in color with many black and red leaves, making a darker brew with more depth. Technically this tea, being a fourth-grade tea, is a by-product of Baihao Yinzhen tea production and uses ''Da Bai'' or Large White leaves. __TOC__ Tasting and brewing The tea can be brewed very differently and there are many combinations that yield interesting results, but it is important to use good mineral water to bring out the sweetness and aroma of the tea and not to over brew or make a bitter and very strong brew. Typically, white teas are brewed at a lower temperature than b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baimudan Tea
Bai Mudan () is a type of white tea made from plucks each with one leaf shoot and two immediate young leaves (one bud two leaf ratio) of the ''Camellia sinensis'' plant.陳宗懋, 中國茶經, pp 236 上海文化出版社 Bai Mudan is sometimes preferred by white tea drinkers for its fuller flavor and greater potency than the other major type of white tea, Bai Hao Yinzhen. The latter is made purely with leaf shoots, and so it is comparatively softer and more subtle. The typical taste of Bai Mudan is a result of both the processing and the tea plant cultivars employed in the production. __TOC__ Production and processing The family of tea cultivars used in producing Bai Mudan are the "Dai Bai" varieties. In eastern Fujian, the cultivar Fuding Dai Bai is used. In northern Fujian, the Zhenghe Dai Bai cultivar is used. The differences in the plant yield two distinct styles of Bai Mudan: the Fuding variety and the Zhenghe variety. Genuine Bai Mudan is a white tea; therefore, it is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pekoe
In the tea industry, tea leaf grading is the process of evaluating products based on the quality and condition of the tea leaves themselves. The highest grades for Western and South Asian teas are referred to as "orange pekoe", and the lowest as "fannings" or "dust". Pekoe tea grades are classified into various qualities, each determined by how many of the adjacent young leaves (two, one, or none) were picked along with the leaf buds. Top-quality pekoe grades consist of only the leaf buds, which are picked using the balls of the fingertips. Fingernails and mechanical tools are not used, to avoid bruising. Certain grades of leaf are better suited to certain varieties of tea. For example, most white tea is processed from the buds or shoots of the tea plant. When crushed to make bagged teas, the tea is referred to as "broken", as in "broken orange pekoe" ("BOP"). These lower grades include fannings and dust, which are tiny remnants created in the sorting and crushing processes. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catechin
Catechin is a flavan-3-ol, a type of secondary metabolite providing antioxidant roles in plants. It belongs to the subgroup of polyphenols called flavonoids. The name of the catechin chemical family derives from ''catechu'', which is the tannic juice or boiled extract of ''Mimosa catechu'' (''Acacia catechu'' L.f). Chemistry Catechin possesses two benzene ring Benzene is an organic chemical compound with the molecular formula C6H6. The benzene molecule is composed of six carbon atoms joined in a planar ring with one hydrogen atom attached to each. Because it contains only carbon and hydrogen atom ...s (called the A- and B-rings) and a dihydropyran heterocycle (the C-ring) with a hydroxyl group on carbon 3. The A-ring is similar to a resorcinol moiety while the B-ring is similar to a catechol moiety. There are two chirality (chemistry), chiral centers on the molecule on carbons 2 and 3. Therefore, it has four diastereoisomers. Two of the isomers are in trans configura ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Health Effects Of Tea
Although health benefits have been assumed throughout the history of using ''Camellia sinensis'' as a common beverage, there is no high-quality evidence that consuming tea confers significant benefits other than possibly increasing alertness, an effect caused by caffeine in the tea leaves. In clinical research conducted over the early 21st century, tea has been studied extensively for its potential to lower the risk of human diseases, but there is no good scientific evidence to indicate that consuming tea affects any disease or improves health. In regions without access to safe drinking water, boiling water to make tea is effective for reducing waterborne diseases by destroying pathogenic microorganisms. By constituents or substances Aluminum, iron and other metals Tea drinking accounts for a high proportion of aluminum in the human diet. The levels are safe, but there has been some concern that aluminum traces may be associated with Alzheimer's disease. A 2013 study addit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyphenols In Tea
The phenolic content in tea refers to the phenols and polyphenols, natural plant compounds which are found in tea. These chemical compounds affect the flavor and mouthfeel of tea. Polyphenols in tea include catechins, theaflavins, tannins, and flavonoids. Polyphenols found in green tea include, but are not limited to, epigallocatechin gallate (EGCG), epigallocatechin, epicatechin gallate, and epicatechin; flavanols such as kaempferol, quercetin, and myricitin are also found in green tea. Catechins Catechins include epigallocatechin-3-gallate (EGCG), epicatechin (EC), epicatechin-3-gallate (ECg), epigallocatechin (EGC), catechin, and gallocatechin (GC).The content of EGCG is higher in green tea. Catechins constitute about 25% of the dry mass of a fresh tea leaf, although total catechin content varies widely depending on species, clonal variation, growing location, season, light variation, and altitude. They are present in nearly all teas made from ''Camellia sinensis'', in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yunnan
Yunnan , () is a landlocked Provinces of China, province in Southwest China, the southwest of the People's Republic of China. The province spans approximately and has a population of 48.3 million (as of 2018). The capital of the province is Kunming. The province borders the Chinese provinces of Guizhou, Sichuan, autonomous regions of Guangxi, and Tibet Autonomous Region, Tibet as well as Southeast Asian countries: Vietnam, Laos, and Myanmar. Yunnan is China's fourth least developed province based on disposable income per capita in 2014. Yunnan is situated in a mountainous area, with high elevations in the northwest and low elevations in the southeast. Most of the population lives in the eastern part of the province. In the west, the altitude can vary from the mountain peaks to river valleys by as much as . Yunnan is rich in natural resources and has the largest diversity of plant life in China. Of the approximately 30,000 species of Vascular plant, higher plants in China, Yu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Camellia Taliensis
''Camellia taliensis'' (also known as Yunnan large leaf varietal tea, wild tea, Dali tea, Yunnan broad tea, and others; 大理茶) is a species of evergreen shrub or small tree whose leaves and leaf buds are used to produce tea. It is of the genus ''Camellia'' of flowering plants in the family Theaceae. ''C. taliensis'' is an important wild relative to the cultivated tea plant ''Camellia sinensis.'' It also belongs to the same section ''Thea'' as ''C. sinensis.'' It is an endangered species due to human caused fragmentation of the plant's natural habitat and from overpicking of the leaves for the tea market. Nomenclature and taxonomy Description ''Camellia talensis'' has five locules per ovary while in comparison ''C. sinensis'' has three locules per ovary. It grows primarily in the southwestern portion of Yunnan province in China and in neighboring areas in Thailand and northern Myanmar. ''C. taliensis'' has larger leaves than ''C. sinensis'' var. ''sinensis'' cl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
