Takahiro Irie

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Among the possible causes of pancreatitis, an autoimmune mechanism was introduced by Sarles et al (1, 2), who designated it “primary inflammatory sclerosis of the pancreas” or “primary inflammatory pancreatitis”. However, this is thought to explain only a small proportion of pancreatitis cases. Since their reports, similar types of pancreatitis have been(More)
Mollusks show a diversity of shell growth patterns. We develop a model for the dynamic resource allocation to defense organs and analyze it with the Pontryagin maximum principle. A typical optimal growth schedule is composed of the initial phase of soft-body growth without shell followed by a simultaneous growth of shell and soft body and finally the(More)
Ocean acidification is potentially one of the greatest threats to marine ecosystems and global carbon cycling. Amongst calcifying organisms, coccolithophores have received special attention because their calcite precipitation plays a significant role in alkalinity flux to the deep ocean (i.e., inorganic carbon pump). Currently, empirical effort is devoted(More)
Periodicities in siphon extension behavior, which is considered an index of feeding behavior, of the Manila clam Ruditapes philippinarum were investigated by sequential visual observations in water tanks under laboratory conditions. Most clams actively extended their siphons in the dark period and closed their shells in the light period under the 12L:12D(More)
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