H
Hiroshi Koyama
Researcher at Gunma University
Publications - 103
Citations - 2294
Hiroshi Koyama is an academic researcher from Gunma University. The author has contributed to research in topics: Selenium & Population. The author has an hindex of 23, co-authored 103 publications receiving 1907 citations.
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Cadmium, copper, and zinc levels in rice and soil of Japan, Indonesia, and China by soil type.
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Chemical forms of selenium for cancer prevention
TL;DR: Speciation investigations provide evidence that the Se compounds, which can generate monomethylated Se (e.g., Se-methylselenocysteine and methylseleninic acid), are more efficacious than other Se compounds because of their chemoprevention activity.
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Characteristics of a community-based distribution of home blood pressure in Ohasama in northern Japan
Yutaka Imai,Hiroshi Satoh,Kenichi Nagai,Mariko Sakuma,Hiromichi Sakuma,Naoyoshi Minami,Masanori Munakata,Junichiro Hashimoto,Toshio Yamagishi,Noriko Watanabe,Tamami Yabe,Akimitsu Nishiyama,Haruo Nakatsuka,Hiroshi Koyama,Keishi Abe +14 more
TL;DR: Home blood pressure increased gradually with increasing age in both men and women, although blood pressure was significantly higher in men until 50 years of age, and day-to-day variation of home systolic blood pressure also increased with age.
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Kaempferol-3-O-rhamnoside isolated from the leaves of Schima wallichii Korth. inhibits MCF-7 breast cancer cell proliferation through activation of the caspase cascade pathway
Ajeng Diantini,Anas Subarnas,Keri Lestari,Eli Halimah,Yasmiwar Susilawati,Supriyatna,Euis Julaeha,Tri Hanggono Achmad,Eka W. Suradji,Chiho Yamazaki,Kenji Kobayashi,Hiroshi Koyama,Rizky Abdulah +12 more
TL;DR: This study isolated kaempferol-3-O-rhamnoside as an active compound from the leaves of Schima wallichii Korth, a plant commonly consumed by non-human primates, and its anti-cancer activities, including its ability to induce apoptotic mechanisms, were investigated in MCF-7 breast cancer cells.
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Health status and lifestyle factors as predictors of depression in middle-aged and elderly Japanese adults: a seven-year follow-up of the Komo-Ise cohort study
TL;DR: These results suggest that lifestyle and health status are risk factors for depression in men and women, and that Preventive measures for depression must take gender into account.