Hirotsugu Takayanagi

Determination of Amino Acids in Tea by High-Performance Liquid Chromatography

K. Ikegaya, Hirotsugu Takayanagi, T. Anan, 1989 .

Quantitative Analysis of Tea Constituents

K. Ikegaya, Hirotsugu Takayanagi, T. Anan, 1990 .

Near Infrared Spectrophotometric Analysis of Total Nitrogen Content in Green Tea

J. Uozumi, A. Hino, K. Ikegaya, 1985 .

Changes in Lipid Content during Storage of Green Tea

M. Nakagawa, K. Ikegaya, Hirotsugu Takayanagi, 1982 .

Chemical Composition of Mat-cha

K. Ikegaya, Hirotsugu Takayanagi, T. Anan, 1984 .