An enzyme hydrolyzing L-theanine in tea leaves.
نویسندگان
چکیده
منابع مشابه
Seasonal Variation of L-Theanine Content in Tea: A Study on Darjeeling Black Tea
To date quality and selling price of a tea mainly depends on its flavour, taste and texture but not on its medicinal properties though a Chinese scientist in 780 AD suggested and acclaimed tea as a divine remedy and supreme gift of God for preserving mental tranquillity. Different studies have been showed that L-theanine is the key component of tea which can make us mentally calm, cool and rela...
متن کاملProperties of an immobilized pesticide-hydrolyzing enzyme.
A bacterial enzyme(s) capable of hydrolyzing nine organophosphate insecticides was covalently bound to glass. The efficiency of this binding reaction ranged from 4 to 17%. Under continuous column operation, the immobilized enzyme(s) had an extrapolated half-life of 280 days. The specific activity of this glass-covalently bound hydrolase activity for parathion varied from 0.035 to 0.15 mumol/min...
متن کاملL-theanine, a natural constituent in tea, and its effect on mental state.
Tea is the most widely consumed beverage in the world after water. Tea is known to be a rich source of flavonoid antioxidants. However tea also contains a unique amino acid, L-theanine that may modulate aspects of brain function in humans. Evidence from human electroencephalograph (EEG) studies show that it has a direct effect on the brain (Juneja et al. Trends in Food Science & Tech 1999;10;19...
متن کاملEffects of theanine, a unique amino acid in tea leaves, on memory in a rat behavioral test.
We identified an effect of theanine on memory functions in a novel object test. Rats were fed theanine for 3 weeks ad libitum, and then they performed the object test. The theanine-fed group performed search behavior for the novel object in the test session. The results suggest that theanine-fed rats showed improved recognition, and that theanine affected learning and memory.
متن کاملL-Theanine Content and Related Gene Expression: Novel Insights into Theanine Biosynthesis and Hydrolysis among Different Tea Plant (Camellia sinensis L.) Tissues and Cultivars
L-Theanine content has tissues and cultivars specificity in tea plant (Camellia sinensis L.), the correlations of theanine metabolic related genes expression profiles with theanine contents were explored in this study. L-theanine contents in the bud and 1st leaf, 2nd leaf, 3rd leaf, old leaf, stem, and lateral root were determined by HPLC from three C. sinensis cultivars, namely 'Huangjinya', '...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Agricultural and Biological Chemistry
سال: 1985
ISSN: 0002-1369,1881-1280
DOI: 10.1271/bbb1961.49.2913