Yoshitomo Ikai

A Nonempirical Method Using LC/MS for Determination of the Absolute Configuration of Constituent Amino Acids in a Peptide:  Combination of Marfey's Method with Mass Spectrometry and Its Practical Application

Kiyonaga Fujii, Yoshitomo Ikai, Hisao Oka et al. · Analytical Chemistry · 1997 · 468 citations

Pharmacy, Biochemistry, Analytical Chemistry +16

A Nonempirical Method Using LC/MS for Determination of the Absolute Configuration of Constituent Amino Acids in a Peptide:  Elucidation of Limitations of Marfey's Method and of Its Separation Mechanism

Kiyonaga Fujii, Yoshitomo Ikai, Tsuyoshi Mayumi et al. · Analytical Chemistry · 1997 · 343 citations

Pharmacy, Biochemistry, Chromatographic Analysis +16

Formation, characterization, and toxicity of the glutathione and cysteine conjugates of toxic heptapeptide microcystins

Fumio Kondo, Yoshitomo Ikai, Hisao Oka et al. · Chemical Research in Toxicology · 1992 · 205 citations

Pharmacy, Biochemistry, Toxicology +15

Application of d,l-FDLA derivatization to determination of absolute configuration of constituent amino acids in peptide by advanced Marfey's method

Ken‐ichi Harada, Kiyonaga Fujii, Kayo Hayashi et al. · Tetrahedron Letters · 1996 · 132 citations

Pharmacy, Biochemistry, Chromatographic Analysis +14

Photodecomposition products of tetracycline in aqueous solution

Hisao Oka, Yoshitomo Ikai, Norihisa Kawamura et al. · Journal of Agricultural and Food Chemistry · 1989 · 107 citations

Natural Sciences, Chemistry, Food Science +5