The Effect of Washing of Green Leaves on the Tea Manufacture (Part 1):On the Relation between the Washing Method and the Radioactivity and Qualities of Tea
スポンサーリンク
概要
- 論文の詳細を見る
The influences of the washing methods of green-leaves on the decreasing degree of its radioactivity and on the qualities of tea were investigated. The results obtained were summarized as follows:<BR>1. Radioactivity of green-leaves in the first crop was the most intensive, but it was weakened by 1/3-1/6 gradually in the second and third crops. Although about 20% of theradioactivity was reduced during the manufacturing process of tea, the decreasing rate became greater if the green-leaves were washed.<BR>2. Concerning with the kinds of cleansers, acidic and neutral cleansers were more effective than the alkaline ones, but Dairy-BON (alkaline) was effective in the third crop. The qualities of tea washed by Lipon-F (neutral) were very good, but those washed by acidic cleansers were inferior because a part of greenleaves was changed reddish brown in color occasionally.<BR>3. As the influence of washing on the qualities of tea, it was recognized that significant differences existed on the style and aroma in the first crop, on the color, liquor, aroma and total evaluation in the second crop, and on the aroma, taste and total evaluation in the third crop, and the qualities of tea were improved by washing the green-leaves except with the acidic cleansers.<BR>4. There was not an obvious difference on the pH of infusion and hot water extract, so it seemed that the cleansers did not remained on the surface of tea-leaves and washing of green-leaves did not reduced the chemical components.<BR>5. It was recognized that the decreasing of the radioactivity was remarkable in the primary heating and rolling process or secondary drying process in the case of Sentya, and Tamaryokutya and Kamairitya showed much less radioactive than the Black tea which was made by the same green-leaves as the former two.
- 日本茶業技術協会の論文
著者
関連論文
- 磐田原茶園土壌調査報告
- Survey on the Properties of Black Teas of Five Tea Varieties
- On the Percolation Loss of Nitrogen Nutrients from the Tea Garden Soil
- Studies on the Specific Manufacturing Procedure of Tea Varieties for Sentya (Part 2):Steaming Effect on the Tea Leaves of Some Varieties
- Studies on the Improvement of Tamaryokutya for Export (Part 3):Survey on the Properties of Kamairitya and Tamaryokutya Made with Several Tea Varieties
- Absorption and Dissolution of Magnesium by the Tea Garden Soil
- The Humus Type of the "Kuroboku" Tea Garden Soil
- On the Phosphorus Contents of Various Forms and the Phosphorus Absorptive Power in the Tea Soils
- Manurial Effect of Magnesium on the Tea Plant (Part 1)
- Study on the Productivity of the Tea Soil (Part1):On the Soil Type of Makinohara Plateau, Shizuoka-Ken
- Soil Profile of High-and Low-Productive Tea Gardens (Preliminary Report):On the Tea Soil of Southern Haibara-gun Shizuoka-ken
- Relation Between the Soil Structure and the Growth of Tea Plant (Part 1):The Structure of Tea Soils
- The Effect of Washing of Green Leaves on the Tea Manufacture (Part 1):On the Relation between the Washing Method and the Radioactivity and Qualities of Tea
- On the Manufacturing method of Yonkontya (Part 1)
- On the Change of Forms of Phosphorus Added in the Tea Soils
- Relation between the Degree of Calcium, Potassium and Magnesium Saturation of Soil and the Growth of the Tea Plant (Part 1):On the Soil Derived from the Fuji Volcanic Ash Soil
- Soil Survey on the Tea Garden of Goka-mura, Haibara-gun, Shizuoka-prefecture
- On the Seasonal Change of Available Nutrition in the Tea Soil
- Manurial Effect of Magnesium on the Tea Plant (Part 2)
- Studies on the Behavior of Mineral Nutrients in the Tea Plant (Part 1):Behavior of Phosphorus (P32)
- Variation of Mineral Contents at Different Leaf Positions on the Stem of Tea Plant
- On the Fluctuation of Soil Moisture Content in the Tea Garden
- On the Tea Soil of Makinohara Plateau, Shizuoka Prefecture
- Experiments on the C.C.C. Single Action Tea Roller
- Studies on the Uniform Operation of Rough Rolling Process of Green Tea Manufacture
- Studies of the Color of Liquor of Black Tea (Part 2):On the Relation between the Estimation of Sensory Testing and the Color of Liquor by I.C.I.Method
- Studies on the Color of Liquor of Black Tea (Part 1):On the Color Grading of Liquor of Black Tea with Electric Photometer
- Studies on the Specific Manufacturing Procedure of Tea Varieties for Sentya (Part 1):Survey of the Propertiesof Stenya Made with the Leaves of Several Tea Varieties
- Studies on the Guri Tea for Export (Part 1)
- Effects of Saturation Degree of Calcium and Nitrogenous Fertilizers on the Behaviour of Phosphates in the Tea Soil
- Absorption of P32 by the Tea Plant (Preliminary Experiment)
- Soil Survey on the Tea Garden of Saigô-mura, Ogasa-gun, Shizuoka-prefecture
- Studies on Nutrient Deficiencies in Tea Plant (Part 2):Effect of Nutrient Deficiencies on Mineral Contents in Tea Leaf
- Studies on the Improvement of Guri Tea for Export (Part 1):Survey on the Properties of Pan-Parched Teas Made with Several Tea Varieties
- Soil Survey on the tea Garden of Yamakita-Chô, Ashigarakami-Gun, Kanagawa-Ken
- Relation between the Saturation Degree of Exchangeable Calcium, Potassium and Magnesium of Soil and the Growth of the Tea Plant (Part 4):Effect of Saturation Degree of Exchangeable Calcium of Soil on the Mineral Contents of New Leaf, Mature Leaf Old Leaf