Publications by authors named "Ohba M"

Ever since de Saussure [Course in General Lingustics (Columbia University Press, 1916)], theorists of language have assumed that the relation between form and meaning of words is arbitrary. However, recently, a body of empirical research has established that language is embodied and contains iconicity. Sound symbolism, an intrinsic link language users perceive between word sound and properties of referents, is a representative example of iconicity in language and has offered profound insights into theories of language pertaining to language processing, language acquisition, and evolution.

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A highly convergent and scalable second-generation synthesis of the fully functionalized HIJKLMN-ring segment of Caribbean ciguatoxin C-CTX-1, the primary toxin responsible for ciguatera fish poisoning in the Caribbean Sea and the Northeast Atlantic regions, has been accomplished. Key aspects of the synthetic approach include the efficient syntheses of the HI- and KLM-ring fragments on gram scales, a convergent fragment coupling toward the HIJKLM-ring skeleton based on the Suzuki-Miyaura coupling strategy, and optimized iron hydride-catalyzed hydrogen atom transfer-mediated olefin coupling conditions for constructing the N-ring.

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Learning verbs is an important part of learning one's native language. Prior studies have shown that children younger than 5 years can have difficulty in learning and extending new verbs. The current study extended these studies by showing children multiple events that can be compared during learning, including Japanese- and English-speaking children.

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Background: Nasal alar deformity after cosmetic surgery, including nostril sill notching, alar flattening, and a shallow and indistinct alar-facial crease, commonly results from overresection. We developed revision methods for postoperative alar deformity, and applied them from 2016 to 2022 to the revision of 16 cases, consisting of 1 male and 15 female patients, with a median age of 28.5 years.

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Two-dimensional (2D) materials are known for their potential to exhibit anisotropic transport properties due to their layered structures. However, the anisotropic ion conduction of 2D metal-organic frameworks (MOFs) has been rarely explored. In this study, we investigated the anisotropic proton conduction along the in-plane and stacking directions of two analogs of undulating 2D MOFs: [Mn(salen)][Pt(CN)]·HO () and [Mn(salen)][PtI(CN)]·HO ().

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Article Synopsis
  • * A case study discusses a young Japanese woman with preexisting IgAV who developed glomerulonephritis after contracting COVID-19, experiencing symptoms like hematuria and proteinuria following her illness.
  • * After a renal biopsy confirmed her condition, she was treated with corticosteroids and showed significant improvement, indicating that COVID-19 may provoke kidney issues in IgAV patients without prior renal symptoms.
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Protein immobilization using water-soluble ionic metal-organic polyhedra (MOPs) acting as porous spacers has recently been demonstrated as a potent strategy for the preparation of biocatalysts. In this article, we describe a mixed-protein approach to achieve biocomposites with adjustable enzyme contents and excellent immobilization efficiencies, in a systematic and well-controlled manner. Self-assembly of either cationic or anionic MOPs with bovine serum albumin or egg white lysozyme combined with enzymes (alkaline phosphatase, laccase or cytochrome c) led to solid-state catalysts with a high retention of enzyme activity.

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Flat layers are usually considered as structurally rigid motifs in two-dimensional (2D) materials. In this work, we demonstrate that a flat honeycomb-layer composed of distorted tri-coordinate copper ions bridged with cyanidos in (tetraethylammonium)Cu(CN) exhibits high in-plane flexibility. This resulted in an extremely large anisotropic 2D-thermal expansion.

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An easy, growth approach led to the formation of several composites of metal-organic framewoks and NbCT MXenes mixed intimately at the submicron scale. The high affinity of MXene surface for dopamine, enhanced by a nanostructuration induced by MOFs, resulted in superior sensing performances. The system exhibited good linearity over the 1-100 nM range, with an excellent limit of detection of 0.

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A woman with a single coronary artery underwent aortic valve replacement due to aortic stenosis. Two years later, she developed an aortic annular abscess around the right coronary cusp and non-coronary cusp. Significant adhesions to the right coronary artery (RCA) resulted from the abscess, making artery separation challenging, and raising concerns about potential future RCA stenosis.

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Article Synopsis
  • - A new 2D Hofmann-type framework was created using a bidentate co-ligand, 5,5'-dimethyl-2,2'-bipyridyl (dmbpy), which influences the curvature of the material's layers.
  • - X-ray diffraction revealed that this framework consists of coordination polymers (Mn(dmbpy)[MN(CN)]) that have a highly corrugated structure and specific coordination geometries for manganese (Mn) and chromium (Cr).
  • - The second compound (Cr) exhibits metamagnetic-like behavior at low temperatures due to interactions between the two metal ions, showcasing both antiferromagnetic and ferromagnetic characteristics.
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Ion conductors comprising noncentrosymmetric frameworks have emerged as new functional materials. However, strongly correlated polarity functionality and ion transport have not been achieved. Herein, we report a ferroelectric proton conductor, KMnN(CN)·HO (), exhibiting the strong correlation between its polar skeleton and conductive ions that generate anomalous ferroelectricity via the proton-bias phenomenon.

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The synthesis of Janus-type layers, which possess front and back sides that consist of different structures, remains a major challenge in the field of two-dimensional materials. In this study, two Janus-type layered coordination polymers, namely, Cu(NEtH)(NMeH·HO)Cu(CN) () and Cu(NMeH)(NMeH·HO)Cu(CN) (), were synthesized via a simple one-pot procedure using copper(II) nitrate and sodium cyanido in mixed solutions of dimethylamine and ethylamine. Uniquely, and were composed of cyanido-bridged neutral layers and exhibited a CuCu mixed-valent state.

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Introduction: Atrial fibrillation (AF) is a risk factor for reduced cerebral blood flow (CBF) and cognitive dysfunction, even in stroke-free patients. We aimed to test the hypothesis that CBF and hippocampal blood flow (HBF), measured with arterial spin labeling magnetic resonance imaging (MRI), improve after catheter ablation of AF to achieve sinus rhythm (SR).

Methods: A total of 84 stroke-free patients (63.

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An efficient water-based purification strategy for metal-organic polyhedra (MOPs) using commercially available centrifugal ultrafiltration membranes was developed. Having a diameter above 3 nm, MOPs were almost fully retained by the filters, while free ligands and other impurities were washed away. MOP retention also enabled efficient counter-ion exchange.

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Article Synopsis
  • The study describes a new hybrid material made from 1-propylpyridinium and [ReN(CN)] that undergoes significant structural transformations when exposed to water vapor.
  • When water vapor is introduced, the material changes from dehydrated nitrido-bridged chains to hydrated cyanido-bridged tetranuclear clusters, altering the arrangement of the molecules in the crystals.
  • These two forms of the material have different light-emitting properties due to metal-centered transitions, with the nitrido-bridged chain emitting near-infrared light at 749 nm and the cyanido-bridged clusters emitting at 561 nm, showcasing a color shift related to temperature changes.
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Background: Cerebrospinal fluid (CSF) area mask correction reduces the influence of low [I]-N-fluoropropyl-2b-carbomethoxy-3b-(4-iodophenyl) nortropane (I-FP-CIT) accumulation in the volume of interest (VOI) by CSF area dilatation on the specific binding ratio (SBR) calculated using the Southampton method. We assessed the effect of CSF area mask correction on the SBR for idiopathic normal pressure hydrocephalus (iNPH) characterized by CSF area dilatation.

Methods: We enrolled 25 patients with iNPH who were assessed using I-FP-CIT single-photon emission computed tomography (SPECT) before shunt surgery or the tap test.

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Metal-organic polyhedra (MOPs) can act as elementary structural units for the design of modular porous materials; however, their association with biological systems remains greatly restricted by their typically low stabilities and solubilities in water. Herein, we describe the preparation of novel MOPs bearing either anionic or cationic groups and exhibiting a high affinity for proteins. Simple mixing of the protein bovine serum albumin () and ionic MOP aqueous solutions resulted in the spontaneous formation of MOP-protein assemblies, in a colloidal state or as solid precipitates depending on the initial mixing ratio.

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Cerebellar injuries can cause syntax impairments. Cortical dysfunction due to cerebello-cerebral diaschisis is assumed to play a role in this phenomenon. Functional magnetic resonance imaging studies have repeatedly shown the activation of Broca's area in response to syntactic tasks.

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Inclusion structures incorporating more than one guest molecule are elusive because confinement alters their molecular properties. We report the solid-state characterization of an inclusion complex comprising two γ-cyclodextrins and two [Cu(2-pyridinemethanolate)(2-pyridinemethanol)]PF units. Quantum calculation reveals that occurs.

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Article Synopsis
  • A study investigates how to use machine learning to predict prescription errors in dosing oral prednisolone, a high-risk drug, due to the common issue of wrong doses causing harm to patients.
  • Data was collected from electronic medical records, analyzed using cluster analysis to group similar prescribing patterns, and different machine learning models were tested to improve accuracy.
  • Results showed that preprocessing the data with the SMOTE method enhanced model performance, with the best results coming from the BRF model (ROC-AUC: 0.917) and SVM after preprocessing (ROC-AUC: 0.820).
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Purpose: Myocardial blood flow (MBF) and myocardial flow reserve (MFR) are measurable by N-NH positron emission tomography (PET). MFR, which is the ratio of MBF under adenosine stress to MBF at rest, is prognostically valuable. The ASNC imaging guidelines/SNMMI procedure standards recommend using 2-3 mm pixels, and pixel size does differ between institutions.

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The negative thermal expansion (NTE) of solid-state materials is of significance in various fields, but a very rare phenomenon. In this study, we carried out a meta-analysis for the anisotropic thermal expansion behavior of fifteen two-dimensional coordination polymers [M(salen)][M'(CN)(solvent)] (M = Mn, Fe; M' = MnN, ReN, Pt, Pt(I); = 0.18, 0.

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Previous reports suggest that a headrest made of carbon significantly influences cerebral blood flow in the anterior and posterior regions by image reconstruction and attenuation correction (AC). The present study aimed to develop a headrest that reduces the influence of the AC process on human brain SPECT. To validate the performance of a headrest made of extruded polystyrene (XPS), 10 healthy controls and 43 patients with cerebrovascular disease underwent Tc-ethyl cysteinate dimer SPECT using a carbon headrest and an XPS headrest.

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Chemical responsivity in materials is essential to build systems with switchable functionalities. However, polarity-switchable materials are still rare because inducing a symmetry breaking of the crystal structure by adsorbing chemical species is difficult. In this study, we demonstrate that a molecular organic-inorganic hybrid crystal of (NEt)[MnN(CN)] () undergoes polarity switching induced by water vapor and transforms into a rare example of proton-conducting second-harmonic-generation-active material.

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