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Your search keyword '"Matsushita, Mariko"' showing total 30 results
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30 results on '"Matsushita, Mariko"'

5. Holocene landscape evolution of Osumi Peninsula, southwest Japan, and its relation to volcanic events

Author

Nagasako, Toshiro, Okuno, Mitsuru, Arai, Fusao, Matsushita, Mariko, Matsushima, Yoshiaki, Matsubara, Akiko, Moriwaki, Hiroshi, and Nakamura, Toshio

Abstract

This study discusses the Holocene landscape evolution of the Kimotsuki River basin, Osumi Peninsula, Southern Kyushu Volcanic Field, Japan, with reference to volcanic events. The type stratigraphy of alluvial deposits in lower reaches is constructed by synthetic analyses about the Kushira-yoshimotobashi core. While most hillslopes were stabilized by 6.5 ^C ka and sediment supply from upstream areas was reduced, leading to the widespread deposition of peat layers in the late Holocene, the Holocene transgression resulted in coastal erosion along the cliffs of the non-welded A-Ito ignimbrite and so sediment production in coastal zones increased during 7-5 ^C ka. In addition, K-Ah and Ik-P tephras which fell in the mid-Holocene were re-transported to the lowland. These deposits contributed to infilling of the inner bay and lagoons. The past major volcanic eruptions affected land surface environments discontinuously and episodically, lasting for relatively short periods, although they played important roles in sediment supply. They are thus an abrupt and brief driving force for landscape evolution., タンデトロン加速器質量分析計業績報告 Summaries of Researches Using AMS 2001 (平成13)年度

Published
2002

29. Wave propagation in the photosensitive Belousov-Zhabotinsky reaction across an asymmetric gap.

Author

Ichino T, Fujio K, Matsushita M, and Nakata S

Subjects
Computer Graphics, Software, Models, Theoretical, Photochemical Processes, Radiation
Abstract

The photosensitive Belousov-Zhabotinsky (BZ) reaction was investigated at an asymmetrically illuminated gap, which was drawn using computer software and then projected on a filter paper soaked with BZ solution using a liquid-crystal projector. The probability of the chemical wave passing through the gap with asymmetric illumination was different from that through its mirror image. The location at which the wave disappeared and the time delay of the chemical wave passing through the gap changed depending on the velocity of chemical wave propagation. The experimental results were qualitatively reproduced by a theoretical calculation based on the three-variable Oregonator model that included photosensitivity. These results suggest that the photosensitive BZ reaction may be useful for studying spatiotemporal development that depends on the geometry of excitable fields.

Published
2009
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30. Role of cytokines and proteases in murine scleroderma.

Author

Matsushita M, Yamamoto T, and Yokozeki H

Subjects
Animals, Bleomycin adverse effects, Connective Tissue Cells metabolism, Disease Models, Animal, Extracellular Matrix Proteins biosynthesis, Fibroblasts metabolism, Interleukin-13 immunology, Mice, Scleroderma, Localized enzymology, Scleroderma, Localized immunology, Serine Proteinase Inhibitors physiology, Serpin E2, Serpins physiology, Cytokines immunology, Peptide Hydrolases physiology, Scleroderma, Localized etiology
Abstract

Scleroderma is a fibrotic condition characterized by immunological abnormalities, vascular injury and increased accumulation of extracellular matrix proteins in the skin. Although the etiology of scleroderma has not been fully elucidated, a growing body of evidence suggests that the overproduction of extracellular matrix proteins by activated fibroblasts results from an imbalance between synthesis and degradation of connective tissues. A number of mediators, cytokines, chemokines and growth factors secreted by inflammatory cells and mesenchymal cells (fibroblasts and myofibroblasts) play an important role in the fibrotic process of scleroderma. In this article, we describe recent advances concerning immunological aspects in the pathogenesis of bleomycin-induced murine scleroderma, laying stress on the involvement of interleukin-13 (IL-13) and plasminogen activator inhibitor-1 (PAI-1).

Published
2008

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