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Gyokuro
is a type of green tea from Japan. It differs from the standard ''sencha'' (a classic green tea grown in the sun) in being grown under the shade rather than the full sun. The name "gyokuro" translates as "jewel dew" (or "jade dew"). According to the Japan Tea Central Association, gyokuro is defined as "a tea manufactured in the same manner as sencha from tea leaves picked from covered tea gardens that are almost completely shaded from sunlight for about 20 days using covering materials such as reed screens, straw, or shading nets, from the time when the new shoots of the first flush start to grow." While most sencha is from the cultivar of ''Camellia sinensis'', gyokuro is often made from a specialized variety such as Asahi, Okumidori, Yamakai, and Saemidori. Most gyokuro is grown in the Fukuoka Prefecture, Fukuoka, Kyoto Prefecture, Kyoto, and Mie Prefecture, Mie prefectures. Gyokuro tea production dates back to the 1830s, when the merchant Yamamoto Kahei discovered some Japan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
L-theanine
Theanine , also known as L-theanine, L-gamma-glutamylethylamide, or ''N''5-ethyl-L-glutamine, is a non-proteinogenic amino acid similar to the proteinogenic amino acids L-glutamate and L-glutamine. It is produced by certain plants such as the tea plant ('' Camellia sinensis''), and by some fungi. Theanine was discovered in 1949 as a constituent of green tea and was isolated in 1950 from ''gyokuro'' tea leaves. It constitutes about 1–2% of the dry weight of green tea leaves. The name ''theanine'' usually refers to the enantiomer ''L-theanine'', which is the form found in tea leaves from which it is extracted as a powder. The right-handed enantiomer, ''D-theanine'', is less-studied. Theanine is sold as a dietary supplement. It is packaged in gelatin capsules, tablets, and as a powder, and may be an ingredient in branded supplements with caffeine. It is also used as an ingredient in food and beverages. In 1964 Japan approved its unlimited use in all foods (includ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Green Tea
Green tea is a type of tea made from the leaves and buds of the '' Camellia sinensis'' that have not undergone the withering and oxidation process that creates oolong teas and black teas. Green tea originated in China in the late 1st millennium BC, and since then its production and manufacture has spread to other countries in East Asia. Several varieties of green tea exist, which differ substantially based on the variety of ''C. sinensis'' used, growing conditions, horticultural methods, production processing, and time of harvest. While it may slightly lower blood pressure and improve alertness, current scientific evidence does not support most health benefit claims, and excessive intake of green tea extracts can cause liver damage and other side effects. History Tea consumption has its legendary origins in China during the reign of mythological Emperor Shennong. A book written by Lu Yu in 618–907 AD, '' The Classic of Tea'' ( zh, t= 茶 經, s=, p=chájīng), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sencha
is a type of Japanese green tea (, ) which is prepared by infusing the processed whole tea leaves in hot water. This is as opposed to matcha (), powdered Japanese green tea, where the green tea powder is mixed with hot water and therefore the leaf itself is included in the beverage. Sencha is the most popular tea in Japan. Overview Among the types of Japanese green tea prepared by infusion, sencha is distinguished from such specific types as gyokuro in that it is shaded for a shorter time or not at all, or bancha which is the same tea but harvested later in the season. It is the most popular tea in Japan, representing about 80 percent of the tea produced in the country. The flavour depends upon the season and place where it is produced, but #Shincha, shincha, or 'new tea' from the first flush of the year, is considered the most delicious. Tea-picking in Japan begins in the south, gradually moving north with the spring warmth. During the winter, tea plants store nutrients, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Green Tea
Green tea is a type of tea made from the leaves and buds of the '' Camellia sinensis'' that have not undergone the withering and oxidation process that creates oolong teas and black teas. Green tea originated in China in the late 1st millennium BC, and since then its production and manufacture has spread to other countries in East Asia. Several varieties of green tea exist, which differ substantially based on the variety of ''C. sinensis'' used, growing conditions, horticultural methods, production processing, and time of harvest. While it may slightly lower blood pressure and improve alertness, current scientific evidence does not support most health benefit claims, and excessive intake of green tea extracts can cause liver damage and other side effects. History Tea consumption has its legendary origins in China during the reign of mythological Emperor Shennong. A book written by Lu Yu in 618–907 AD, '' The Classic of Tea'' ( zh, t= 茶 經, s=, p=chájīng), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kukicha
''Kukicha'' ( 茎茶), or twig tea, also known as ''bōcha'' (棒茶), is a Japanese tea blend made of stems, stalks, and twigs of the tea plant. It is available as a green tea or in more oxidised processing. Kukicha has a unique flavour and aroma among teas, due to it being composed of parts of the plant that are excluded from most other teas. Regular kukicha material comes from production of ''sencha'' or ''matcha''. When coming from ''gyokuro's'' production, it takes the name ' (雁ヶ音 / かりがね) or ' (白折 / しらおれ). Karigane has historically been the name of kukicha made from leaves used for gyokuro green tea. However, these days the term karigane has become diverse, and is also used for any kukicha of high quality. Karigane that is specifically from Kyushu is called ''shiraore''. Kukicha has a mildly nutty and slightly creamy sweet flavour. It is made of four sorts of stems, stalks, and twigs of ''Camellia sinensis''. For best results, kukicha is stee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kabuse Tea
Kabuse tea, or is a class of Japanese tea leaf. literally means to cover or place on top, as a hat on a head, therefore kabuse tea is a tea leaf harvested from a tea plant that, for some period of time ranging from 2–25 days, has had a porous material draped over the plant while the young leaves are being produced. Kabuse tea is almost exclusively a first flush tea. Though kabuse tea is usually processed into a green tea after picking, kabuse tea denotes a pre-picking process and the freshly picked leaf can be used to produce any kind of tea, from green tea to oolong tea to black tea, or other types. Background Kabuse tea leaves are used to produce one of the three most expensive Japanese green teas (the others are gyokuro and matcha). These teas are made from leaves that are hand-plucked and grown in the shade. Shade grown leaves produce superior quality green tea - ''ooika'' is the Japanese term for the "covered aroma" of these teas, which are high in theanine and other amino ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caffeine
Caffeine is a central nervous system (CNS) stimulant of the methylxanthine chemical classification, class and is the most commonly consumed Psychoactive drug, psychoactive substance globally. It is mainly used for its eugeroic (wakefulness promoting), ergogenic (physical performance-enhancing), or nootropic (cognitive-enhancing) properties. Caffeine acts by blocking the binding of adenosine at a number of adenosine receptor types, inhibiting the centrally depressant effects of adenosine and enhancing the release of acetylcholine. Caffeine has a three-dimensional structure similar to that of adenosine, which allows it to bind and block its receptors. Caffeine also increases Cyclic adenosine monophosphate, cyclic AMP levels through nonselective Phosphodiesterase inhibitor, inhibition of phosphodiesterase, increases calcium release from intracellular stores, and Receptor antagonist, antagonizes GABA receptor, GABA receptors, although these mechanisms typically occur at concentrati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Senchadō
is a Japanese variant of ''chadō'' ("way of tea"). It involves the preparation and drinking of ''sencha'' green tea, especially the high grade ''gyokuro'' type. History Towards the end of the 17th century in the Edo period, Chinese merchants visiting Nagasaki showed how brewed tea should be drunk, as practised in the Ming dynasty court. This practise of the Chinese tea culture spread in the 18th century until the beginning of the Meiji era, particularly among Scholar-official, literati merchants, in the form of friends meeting in a less formal atmosphere than the ''chanoyu''. Appreciation of painting and literacy objects then took on particular importance. These meetings, often followed by genuine meals, were the opportunity to admire the host's collections, most often composed of objects imported from China or made in Japan in Chinese style called ''karamono''. In difference to the preparation of ''matcha'' tea, which is powdered, ''sencha'' is prepared using small leaf t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chlorophyll
Chlorophyll is any of several related green pigments found in cyanobacteria and in the chloroplasts of algae and plants. Its name is derived from the Greek words (, "pale green") and (, "leaf"). Chlorophyll allows plants to absorb energy from light. Those pigments are involved in oxygenic photosynthesis, as opposed to bacteriochlorophylls, related molecules found only in bacteria and involved in anoxygenic photosynthesis. Chlorophylls absorb light most strongly in the blue portion of the electromagnetic spectrum as well as the red portion. Conversely, it is a poor absorber of green and near-green portions of the spectrum. Hence chlorophyll-containing tissues appear green because green light, diffusively reflected by structures like cell walls, is less absorbed. Two types of chlorophyll exist in the photosystems of green plants: chlorophyll ''a'' and ''b''. History Chlorophyll was first isolated and named by Joseph Bienaimé Caventou and Pierre Joseph Pelletier in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neuroprotection
Neuroprotection refers to the relative preservation of neuronal structure and/or function. In the case of an ongoing insult (a neurodegenerative insult) the relative preservation of neuronal integrity implies a reduction in the rate of neuronal loss over time, which can be expressed as a differential equation. Mechanisms in neurodegeneration, and associated treatments It is a widely explored treatment option for many central nervous system disorders including neurodegenerative diseases, stroke, traumatic brain injury, spinal cord injury, and acute management of neurotoxin consumption (i.e. methamphetamine Methamphetamine (contracted from ) is a potent central nervous system (CNS) stimulant that is mainly used as a recreational drug use, recreational or Performance-enhancing substance, performance-enhancing drug and less commonly as a secon ... overdoses). Neuroprotection aims to prevent or slow disease progression and secondary injuries by halting or at least slowing th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
