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Machine-learning-assisted discovery of polymers with high thermal conductivity using a molecular design algorithm

npj Computational Materials 2019年第1期5卷 569-579页

作者： Stephen Wu yukiko kondo Masa-aki Kakimoto Bin Yang Hironao Yamada Isao Kuwajima Guillaume Lambard Kenta Hongo Yibin Xu Junichiro Shiomi Christoph Schick Junko Morikawa Ryo Yoshida The Institute of Statistical Mathematics Research Organization of Information and SystemsTachikawaTokyo 190-8562Japan The Graduate University for Advanced Studies TachikawaTokyo 190-8562Japan Center for Materials research by Information Integration(CMI2) Research and Services Division of Materials Data and Integrated System(MaDIS)National Institute for Materials Science(NIMS)TsukubaIbaraki 305-0047Japan Institute of Physics and Competence Centre CALOR University of Rostock18059 RostockGermany Japan Advanced Institute of Science and Technology NomiIshikawa 923-1292Japan PRESTO JSTKawaguchiSaitama 332-0012Japan The University of Tokyo Bunkyo-kuTokyo 113-8656Japan Tokyo Tech World Research Hub Initiative(WRHI) Tokyo Institute of TechnologyTokyo 226-8503Japan Tokyo Institute of Technology Meguro-kuTokyo 152-8550Japan

The use of machine learning in computational molecular design has great potential to accelerate the discovery of innovative ***,its practical benefits still remain unproven in real-world applications,particularly in polymer *** demonstrate the successful discovery of new polymers with high thermal conductivity,inspired by machine-learning-assisted polymer *** discovery was made by the interplay between machine intelligence trained on a substantially limited amount of polymeric properties data,expertise from laboratory synthesis and advanced technologies for thermophysical property *** a molecular design algorithm trained to recognize quantitative structure—property relationships with respect to thermal conductivity and other targeted polymeric properties,we identified thousands of promising hypothetical *** these candidates,three were selected for monomer synthesis and polymerization because of their synthetic accessibility and their potential for ease of processing in further *** synthesized polymers reached thermal conductivities of 0.18–0.41 W/mK,which are comparable to those of state-of-the-art polymers in non-composite thermo-plastics.

关键词： conductivity thermal property

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Pleomorphic Adenoma Consisting of Multiple Cysts with Squamous Epithelial Lining: Findings on MRI, FNAC, and Histopathological Examination

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Open Journal of Stomatology 2021年第6期11卷 221-230页

作者： Hiroshi Yamamoto Sakurako Yamaguchi Erika Iwai yukiko Iizuka Shu Fushimi Kunio Hayashi Takumi kondo Satoshi Tokunaga Masaaki Suemitsu Takashi Kaneda Kayo Kuyama Masamichi Komiya Department of Oral Surgery Nihon University School of Dentistry at Matsudo Chiba Japan Department of Radiology Nihon University School of Dentistry at Matsudo Chiba Japan Department of Pathology Nihon University School of Dentistry at Matsudo Chiba Japan

The incidence of pleomorphic adenoma (PA) of the minor salivary glands is reported to be 10%, and while the histological findings in PA can be diverse, keratin-filled cysts lined by squamous epithelium are rarely reported. The condition can, however, present with cyst formation in some cases. We review a rare case of pleomorphic adenoma in the buccal mucosa that involved the formation of multiple squamous epithelium-lined cysts in a 69-year-old woman. Magnetic resonance imaging (MRI), fine needle aspiration cytology, and histopathological examination were performed. Physical examination revealed a painless, mobile, elastic hard mass in the right buccal mucosa, measuring 2.5 × 1.0 cm. The MRI revealed a well-defined lesion with different signal intensities in the medial and distal regions of the right cheek. The medial side of the lesion showed a low signal intensity on T1-weighted imaging (T1WI) and T2-weighted imaging (T2WI), while the distal side showed a low signal intensity on T1WI, and a high signal intensity on T2WI and short tau inversion recovery (STIR) imaging. Fine needle aspiration of the lesion was performed under local anesthesia and a cytological diagnosis of an epidermoid or dermoid cyst was made. The tumor was completely resected under local anesthesia combined with intravenous sedation. The histopathological examination demonstrated the proliferation of atypical tumor cells with poor atypia and the formation of glandular, alveolar, large, and small cysts. The cysts were lined by keratinized squamous epithelial cells, their cavities were filled with keratinous material, and foreign body reaction was observed after rupture. Histopathological evaluation led to the diagnosis of pleomorphic adenoma. The patient had no evidence of recurrence, 2 years and 3 months after the surgery. In conclusion, the presence of multiple cysts lined by squamous epithelium can pose a significant diagnostic challenge in patients with PA. It is important to make the correct

关键词： Salivary Gland Tumor Pleomorphic Adenoma Cystic Formation

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