Publications by authors named "T Usuki"

Ganglions are pseudocysts that develop from part of the joint capsule or tendon sheath and are filled with synovial fluid. In this report, we describe a case of external auditory canal obstruction caused by a temporomandibular joint (TMJ) ganglion that was thought to be related to osteoarthritis. A 62-year-old man with the chief complaint of swelling of the anterior wall of the left external auditory canal underwent cystectomy at the Department of Otorhinolaryngology.

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Article Synopsis
  • The study investigates the short-range and intermediate-range order in GeO2 glass using molecular dynamics and machine-learning interatomic potential alongside reverse Monte Carlo fitting of neutron diffraction data.
  • The analysis includes various methods such as structure factors, coordination number, and persistent homology to compare the models' structural differences.
  • Findings indicate that while both approaches provide similar two-body correlations, they differ significantly in structural ordering, particularly in ring size distributions, with RMC showing broader distributions compared to the narrower distributions from neural network potential molecular dynamics.
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For both dielectric spectroscopy and light scattering spectra, the relaxation modes in the microwave region have been characterized by the Debye relaxation model, which is determined by the peak frequency, or by an empirically extended model (e.g., Cole-Davidson and Kohlrausch-Williams-Watts), which has the appropriate line shape.

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Jamaicamide B was isolated from the cyanobacterium in Jamaica and shows neurotoxicity. This unique mixed peptide-polyketide structure contains a pyrrolinone ring, a β-methoxy enone, an ()-olefin, an undetermined stereocenter at C9, an ()-chloroolefin, and a terminal alkyne. We report herein the first total synthesis and structural confirmation of the marine natural product (9)-jamaicamide B.

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The leaves of Odontonema strictum, a tropical plant used for its antihypertensive properties, are rich in nutrients and biologically active phytochemicals, such as β-sitosterol, stigmasterol, umuravumbolide, deacetylumuravumbolide, dideacetylboronolide, deacetylboronolide, verbascoside, and isoverbascoside. In addition, its roots are rich in β-sitosterol, stigmasterol, and the iridoid glycoside β-O-methyl-unedoside. Ingestion of the roots was reported to have a sedative effect in a dog was previously reported on a dog eating the roots of this plant.

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