302 research outputs found

    Study on Liquid Management Technology in Water Tank for Propulsion System Utilizing Aluminum and Water Reaction (Improvement of Liquid Acquisition Performance by Hydrophilic Coating in Metallic Tank)

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    In order to use hydrogen as a fuel for spacecraft propulsion system, utilization of aluminum and water reaction system is considered. Liquid-gas separation is necessary for water tank in this propulsion system. The purpose of this study is to confirm the applicability of water to the surface tension liquid acquisition mechanism in tank by improving wettability using a silica coating. It was demonstrated that silica coating could improve the wettability of water against metallic material applied to practical tanks. By the microgravity experiment using drop tower facility, it was confirmed that water in tank could be acquired on the liquid outlet by vane device with silica coating

    Strong Coupling Superconductivity in the Vicinity of the Structural Quantum Critical Point in (CaxSr1-x)3Rh4Sn13

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    The family of the superconducting quasiskutterudites (CaxSr1?x)3Rh4Sn13 features a structural quantum critical point at xc=0.9, around which a dome-shaped variation of the superconducting transition temperature Tc is found. Using specific heat, we probe the normal and the superconducting states of the entire series straddling the quantum critical point. Our analysis indicates a significant lowering of the effective Debye temperature on approaching xc, which we interpret as a result of phonon softening accompanying the structural instability. Furthermore, a remarkably large enhancement of 2?/kBTc and ?C/?Tc beyond the Bardeen-Cooper-Schrieffer values is found in the vicinity of the structural quantum critical point. The phase diagram of (CaxSr1?x)3Rh4Sn13 thus provides a model system to study the interplay between structural quantum criticality and strong electron-phonon coupling superconductivity

    New evidence on the Early Cretaceous Fossil Avifauna in the eastern margin of Asia from the Kitadani Formation of the Tetori Group

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    13301甲第4951号博士(理学)金沢大学博士論文要旨Abstract 要約Outline 以下に掲載:CHAPTER 3: Memoir of the Fukui Prefectural Dinosaur Museum 17(1) pp.1-8 2018. Fukui Prefectural Dinosar Museum. 共著者:Imai, T., Y. Tsukiji, Y. Azuma CHAPTER 4: Historical Biology 27(8) pp.1090-1097 2014. Taylor & Francis. 共著者:Imai, T., Y. Azum

    Idiopathic Pneumonia Syndrome Refractory to Ruxolitinib after Post-Transplant Cyclophosphamide-based Haploidentical Hematopoietic Stem Cell Transplantation: Lung Pathological Findings from an Autopsy Case

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    A 69-year-old Japanese man with acute leukemia received post-transplant cyclophosphamide-based haploidentical stem cell transplantation (PTCY-haplo-SCT) but was readmitted with dyspnea and ground-glass-opacities of the lungs. Bronchoscopy showed inflammatory changes with no signs of infection. He received steroids but required intubation as his condition deteriorated. In addition to antithymocyte globulin and cyclophosphamide, we administered ruxolitinib but failed to save him. Autopsy findings revealed fibrotic nonspecific interstitial pneumonia (NSIP) without evidence of organizing pneumonia or infection. Thus, we diagnosed idiopathic pneumonia syndrome (IPS). As far as our knowledge, this is the first case of IPS with NSIP histology after PTCY-haplo-SCT

    Unexpected outcome after sclerotherapy of simple renal cyst

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    BACKGROUND: Simple renal cysts usually have benign clinical features. We report a rare case of papillary renal cell carcinoma (RCC) associated with a large recurrent simple cyst following sclerotherapy. CASE PRESENTATION: A 47-year-old Japanese woman received minocycline sclerotherapy for a large (9 cm in diameter) simple left renal cyst in May 2005. The cyst regrew, and second-line sclerotherapy with ethanol was performed in November 2005. Three years later, she developed papillary RCC on the wall of the recurrent renal cyst. Radical nephrectomy was performed, but the patient died of metastatic disease 15 months after surgery. CONCLUSION: Malignant transformation from recurrent simple renal cyst to RCC may occur in the years following sclerotherapy, underscoring the need for long-term follow-up

    A Disseminated Fusarium fujikuroi Species Complex Infection Prior to Allogeneic Hematopoietic Stem Cell Transplantation

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    A 53-year-old man was diagnosed with acute myeloid leukemia, which was refractory to chemotherapies. Systemic papules appeared afterward. The skin biopsies revealed filamentous fungal infection including fusariosis. Despite antifungal therapy, the infection did not resolve, because neutropenia persisted with the leukemia. He underwent hematopoietic stem cell transplantation (HSCT) to overcome the leukemia and restore normal hematopoiesis but died from fusariosis just before engraftment. Fusarium fujikuroi species complex was detected in blood cultures with poor antifungal susceptibility. Because restoring normal hematopoiesis is important in the treatment of fusariosis, HSCT might be considered for patients with persistent pancytopenia

    A mouse model of autoimmune inner ear disease without endolymphatic hydrops

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    Harada S., Koyama Y., Imai T., et al. A mouse model of autoimmune inner ear disease without endolymphatic hydrops. Biochimica et Biophysica Acta - Molecular Basis of Disease 1870, 167198 (2024); https://doi.org/10.1016/j.bbadis.2024.167198.Autoimmune inner ear disease (AIED) is an organ-specific disease characterized by irreversible, prolonged, and progressive hearing and equilibrium dysfunctions. The primary symptoms of AIED include asymmetric sensorineural hearing loss accompanied by vertigo, aural fullness, and tinnitus. AIED is divided into primary and secondary types. Research has been conducted using animal models of rheumatoid arthritis (RA), a cause of secondary AIED. However, current models are insufficient to accurately analyze vestibular function, and the mechanism underlying the onset of AIED has not yet been fully elucidated. Elucidation of the mechanism of AIED onset is urgently needed to develop effective treatments. In the present study, we analyzed the pathogenesis of vertigo in autoimmune diseases using a mouse model of type II collagen-induced RA. Auditory brain stem response analysis demonstrated that the RA mouse models exhibited hearing loss, which is the primary symptom of AIED. In addition, our vestibulo-oculomotor reflex analysis, which is an excellent vestibular function test, accurately captured vertigo symptoms in the RA mouse models. Moreover, our results revealed that the cause of hearing loss and vestibular dysfunction was not endolymphatic hydrops, but rather structural destruction of the organ of Corti and the lateral semicircular canal ampulla due to an autoimmune reaction against type II collagen. Overall, we were able to establish a mouse model of AIED without endolymphatic hydrops. Our findings will help elucidate the mechanisms of hearing loss and vertigo associated with AIED and facilitate the development of new therapeutic methods
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