Kazuya Ishiwata

Selenosugars are key and urinary metabolites for selenium excretion within the required to low-toxic range

Yayoi Kobayashi, Yasumitsu Ogra, Kazuya Ishiwata et al. · Proceedings of the National Academy of Sciences · 2002 · 294 citations

Life Sciences, Biochemistry, Toxicology +10

Identification of a novel selenium metabolite, Se-methyl-N-acetylselenohexosamine, in rat urine by high-performance liquid chromatography–inductively coupled plasma mass spectrometry and –electrospray ionization tandem mass spectrometry

Yasumitsu Ogra, Kazuya Ishiwata, Hiromitsu Takayama et al. · Journal of Chromatography B · 2002 · 132 citations

Natural Sciences, Biochemistry, Analytical Chemistry +13

Speciation of selenium in selenium-enriched shiitake mushroom, Lentinula edodes

Yasumitsu Ogra, Kazuya Ishiwata, Jorge Ruíz Encinar et al. · Analytical and Bioanalytical Chemistry · 2004 · 110 citations

Agriculture, Food Science, Toxicology +13

Identification of selenohomolanthionine in selenium-enriched Japanese pungent radish

Yasumitsu Ogra, Takashi Kitaguchi, Kazuya Ishiwata et al. · Journal of Analytical Atomic Spectrometry · 2007 · 77 citations

Life Sciences, Biochemistry, Chemistry +14

Simultaneous speciation of selenium and sulfur species in selenized odorless garlic (Allium sativum L. Shiro) and shallot (Allium ascalonicum) by HPLC–inductively coupled plasma-(octopole reaction system)-mass spectrometry and electrospray ionization-tandem mass spectrometry

Yasumitsu Ogra, Kazuya Ishiwata, Yuji Iwashita et al. · Journal of Chromatography A · 2005 · 73 citations

Agriculture, Chemistry, Food Science +17