Publications by authors named "Yu Saitoh"
Article Synopsis
- Long-term monitoring of nutrient fluxes from atmospheric wet and dry depositions along the Japanese coast aimed to understand their effects on phytoplankton blooms and ocean conditions, using isotope analyses to trace air mass origins.
- Nutrient inputs from dry deposition were higher in colder months due to continental air masses carrying dust, but their overall contribution was limited and did not promote permanent phytoplankton blooms throughout the year.
- In contrast, wet deposition during summer from oceanic air masses delivered greater nutrient levels, resulting in increased phytoplankton biomass and significantly altering the chemical composition of sinking particles, which could lead to hypoxic conditions in the ocean.
A screlosed hemangioma of the liver is rare among hepatic tumors. A 75 years old male was referred to our hospital for gastric cancer and a hepatic tumor. The histological finding of gastric cancer was revealed to be well differentiated adenocarcinoma.
View Article and Find Full Text PDFPurpose: To assess the safety and feasibility of pancreatoduodenectomy (PD) in elderly patients, we investigated the clinical characteristics of patients aged ≥75 years, who underwent this procedure at our hospital.
Methods: Between November 2005 and December 2010, 84 patients underwent PD at Tokushima University Hospital. We analyzed the clinicopathological data and outcomes after PD in patients aged ≥75 years compared with those in patients <75 years.
We observed that Faraday waves are parametrically generated on a free surface of superfluid 4He when a sample cell is vibrated vertically. Standing-wave patterns appear on the surface, and their frequencies are one-half the driving frequency. We observed clear threshold amplitudes of the vibration for the instability.
View Article and Find Full Text PDFWe investigated the effects of natural environments and human activity on Lake Biwa, central Japan. We determined the concentrations of 19 elements and the compositions of stable S and Sr isotopes in the main tributaries of the lake and compared them with the corresponding values obtained from the lake water during the circulation period. Results of a principal component analysis indicated that the components dissolved in the lower reaches of the tributaries can be divided into group 1 (HCO(3), SO(4), NO(3), Ca, Mg, Sr) and group 2 components (Cl, Br, Na, K, Ba, Rb, Cs).
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