Ryoko Hirata

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N. Saigusa, K. Ichii, H. Murakami, R. Hirata, J. Asanuma, H. Den, S.-J. Han, R. Ide, S.-G. Li, T. Ohta, T. Sasai, S.-Q. Wang, and G.-R. Yu Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba 305-8506, Japan Faculty of Symbiotic Systems Science, Fukushima University, Fukushima 960-1296, Japan Earth Observation(More)
Terrestrial biosphere models show large uncertainties when simulating carbon and water cycles, and reducing these uncertainties is a priority for developing more accurate estimates of both terrestrial ecosystem statuses and future climate changes. To reduce uncertainties and improve the understanding of these carbon budgets, we inves5 tigated the ability of(More)
We investigated the effects of divalent alkaline earth and first-row transition metal and zinc ions on α-glucosidase activity in vitro and in vivo. CuSO₄ and ZnSO₄ exhibited a high α-glucosidase inhibitory effect in vitro. The IC(50) values of CuSO₄ were 0.77 ± 0.01 (substrate; maltose) and 0.78 ± 0.01 (substrate; sucrose), and those of ZnSO₄ were 5.49 ±(More)
We found alpha-glucosidase inhibitory (alpha-GI) effect of metal ions and their complexes which showed the high blood glucose lowering effect in diabetic model animals. The Cu(II) ion and its complexes showed strong alpha-GI activity greater than clinically used acarbose in in vitro studies. Furthermore, in in vivo experiments, alpha-GI action was newly(More)
Intrusions occur frequently in the primary dentition. It has been reported that conservative treatment of the intruded primary tooth is preferred if the apex is away from the permanent tooth germ. Conservative treatments include waiting for spontaneous re-eruption, and surgical re-positioning and fixation. Few papers have been published in Japan comparing(More)
Pasania edulis (Makino) Makino is one of the dominant Fagucea tree species in evergreen broad-leaved forests in southern Japan, and its regeneration success may have a major impact on the dynamics of evergreen broad-leaved forests. We conducted a field survey on the population process from acorn production to seedling establishment of P. edulis in an(More)
Simulating carbon and water cycles of larch forests in East Asia by the BIOME-BGC model with AsiaFlux data M. Ueyama, K. Ichii, R. Hirata, K. Takagi, J. Asanuma, T. Machimura, Y. Nakai, T. Ohta, N. Saigusa, Y. Takahashi, and T. Hirano Osaka Prefecture Univ., Graduate School of Life and Environmental Sciences, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, Japan(More)
The positive and negative effects of the residual stand edge at a strip-clearcut site were examined on the initial growth of hinoki (Chamaecyparis obtusa) planted in areas with diverse topography. On the south edge, the gap light index was lower than on the north edge and strip center; however, the vapor pressure deficit was also lower than on the north(More)
The effects of late weeding treatment on the growth of young hinoki (Chamaecyparis obtusa) during the sixth growing season after planting were examined. Furthermore, the contribution toward hinoki growth recovery of crown productivity (NAR) and biomass allocation to crown (CAR) were determined. In the late weeding plot, no decline in height growth was(More)
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