Tadashi Ishimitsu

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In a study of in vitro and in vivo metabolism of L-3,4-dihydroxyphenylalanine (L-Dopa), two methods of high-performance liquid chromatography (HPLC) were used to separate the m- and p-O-methylated products. A reversed-phase column and an aqueous mobile phase by gradient elution were used; the elute was analyzed electrochemically with a single amperometric(More)
To promote cancer chemotherapy among outpatients, a special room for cancer chemotherapy (outpatient drip infusion room) was established in Yamaguchi University Hospital in April 2002. Since then, pharmacists have played a central role in all aspects, including decisions on the flow rate for prescriptions/injections, protocol checking, preparation of(More)
The arid-base chemistry of tyrosine-containing peptides such as enkephalin, tyrosylglycylglycine, tyrosylglycine and analogous peptides is described. For each peptide and tyrosine derivative, microscopic and macroscopic acid dissociation constants and the thermodynamic parameters for proton dissociations were determined from pH-titrations and ultraviolet(More)
For a group of catechol amino-acids varying widely in acid strength and hydrophobicity, the effects of mobile phase composition, pH and ionic strength on their reversed-phase chromatographic separation have been determined, with phosphate buffer as mobile phase. Retention data were measured for 18 catecholamine derivatives. The retardation factors and(More)