Publications by authors named "Kazuaki Masuda"

The optimal conditions for the production of γ-aminobutyric acid (GABA) by the marine yeast isolate Pichia anomala MR-1 strain appeared to be completely different from those required for growth and biomass production of the yeast strain. By proper reaction temperatures and pH levels, the efficiency of GABA production was improved dramatically. Supplying enough energy for the reaction was another important technical element to improve the production efficiency of GABA.

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The external muscle layer of the mammalian esophagus consists of striated muscles. We investigated the contractile properties of esophageal striated muscle by comparison with those of skeletal and cardiac muscles. Electrical field stimulation with single pulses evoked twitch-like contractile responses in esophageal muscle, similar to those in skeletal muscle in duration and similar to those in cardiac muscle in amplitude.

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Marine yeasts were collected from coastal and deep sea areas in the Pacific Ocean and the Sea of Japan around central and northern Japan to prepare a novel type of natural seasoning. It was found that one of the marine yeasts collected from the Pacific Ocean off Hachinohe showed a high concentration of gamma-aminobutyric acid (GABA) in its extract, about 7-10 times higher than those of commercially available bread yeast and other marine yeasts. The marine yeast isolated and named Hachinohe No.

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Introduction: Factors influencing clinical outcomes of osteosynthesis for elderly patients with Garden stage I and II femoral neck fractures are not well understood.

Materials And Methods: To determine the factors influencing the clinical outcomes of in situ osteosynthesis in non-displaced femoral neck fractures in the elderly, radiographs and clinical data of patients were retrospectively analyzed. The subjects were 49 patients with femoral neck fractures (Garden stages I and II), who underwent osteosynthesis, with correctly inserted screws and with more than 2 years of follow up.

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We report a displaced femoral shaft fracture that occurred with no sign of contact-induced, stress, fatigue, or previous abnormal bone pathology in a 19-y-old man who kicked the ground instead of the ball when playing soccer. After examination to rule out abnormal bone pathology, intramedullary nailing was performed. Bone union was achieved and he could return to recreational soccer.

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Study Design: This study focused on the effects that abdominal belts have on the sagittal section of the abdominal and pelvic cavity during contraction of the trunk muscles. Fast magnetic resonance imaging was used during the Valsalva maneuver by 11 healthy men.

Objective: To evaluate the effect of an abdominal belt on the geometric changes in the sagittal section during Valsalva maneuvers.

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