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Your search keyword '"Kawakami, Takashi"' showing total 610 results
Start Over Author "Kawakami, Takashi" Publication Type Academic Journals
610 results on '"Kawakami, Takashi"'

2. Abstract 13407: Long-Term Outcomes of Chronic Thromboembolic Pulmonary Hypertension Treated With Pulmonary Endarterectomy and Balloon Pulmonary Angioplasty: Results From the Japanese Prospective CTEPH Registry (CTEPH AC Registry)

Author

Masaki, Kohei, Hosokawa, Kazuya, Funakoshi, Kouta, TANIGUCHI, Yu, Adachi, Shiro, inami, takumi, Yamashita, Jun, Ogino, Hitoshi, Tsujino, Ichizo, Hatano, Masaru, Yaoita, Nobuhiro, Ikeda, Nobutaka, Shimokawahara, Hiroto, Tanabe, Nobuhiro, Kubota, Kayoko, Shigeta, Ayako, Ogihara, Yoshito, Horimoto, Koshin, Dohi, Yoshihiro, Kawakami, Takashi, Tamura, Yuichi, Tatsumi, Koichiro, and Abe, Kohtaro

Published
2023
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3. Long-term outcome of chronic thromboembolic pulmonary hypertension using direct oral anticoagulants and warfarin: a Japanese prospective cohort study

Author

Hosokawa, Kazuya, Abe, Kohtaro, Funakoshi, Kouta, Tamura, Yuichi, Nakashima, Naoki, Todaka, Koji, Taniguchi, Yu, Inami, Takumi, Adachi, Shiro, Tsujino, Ichizo, Yamashita, Jun, Minatsuki, Shun, Ikeda, Nobutaka, Shimokawahara, Hiroto, Kawakami, Takashi, Ogo, Takeshi, Hatano, Masaru, Ogino, Hitoshi, Fukumoto, Yoshihiro, Tanabe, Nobuhiro, Matsubara, Hiromi, Fukuda, Keiichi, Tatsumi, Koichiro, and Tsutsui, Hiroyuki

Published
2023
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6. The complement C3-complement factor D-C3a receptor signalling axis regulates cardiac remodelling in right ventricular failure

Author

Ito, Shogo, Hashimoto, Hisayuki, Yamakawa, Hiroyuki, Kusumoto, Dai, Akiba, Yohei, Nakamura, Takahiro, Momoi, Mizuki, Komuro, Jin, Katsuki, Toshiomi, Kimura, Mai, Kishino, Yoshikazu, Kashimura, Shin, Kunitomi, Akira, Lachmann, Mark, Shimojima, Masaya, Yozu, Gakuto, Motoda, Chikaaki, Seki, Tomohisa, Yamamoto, Tsunehisa, Shinya, Yoshiki, Hiraide, Takahiro, Kataoka, Masaharu, Kawakami, Takashi, Suzuki, Kunimichi, Ito, Kei, Yada, Hirotaka, Abe, Manabu, Osaka, Mizuko, Tsuru, Hiromi, Yoshida, Masayuki, Sakimura, Kenji, Fukumoto, Yoshihiro, Yuzaki, Michisuke, Fukuda, Keiichi, and Yuasa, Shinsuke

Published
2022
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7. Balloon pulmonary angioplasty versus riociguat in inoperable chronic thromboembolic pulmonary hypertension (MR BPA): an open-label, randomised controlled trial

Author

Kawakami, Takashi, Matsubara, Hiromi, Shinke, Toshiro, Abe, Kohtaro, Kohsaka, Shun, Hosokawa, Kazuya, Taniguchi, Yu, Shimokawahara, Hiroto, Yamada, Yoshitake, Kataoka, Masaharu, Ogawa, Aiko, Murata, Mitsushige, Jinzaki, Masahiro, Hirata, Kenichi, Tsutsui, Hiroyuki, Sato, Yasunori, and Fukuda, Keiichi

Published
2022
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25. Model calculations for the prediction of the diradical character of physisorbed molecules: p-benzyne/MgO and p-benzyne/SrO.

Author

Tada, Kohei, Kawakami, Takashi, and Hinuma, Yoyo

Abstract

The analysis of the diradical state of functional open-shell molecules is important for understanding their physical properties and chemical reactivity. The diradical character is an important factor in the functional elucidation and design of open-shell molecules. In recent years, attempts have been made to immobilise functional open-shell molecules on surfaces to form devices. However, the influence of surface interactions on the diradical state remains unclear. In this study, the physisorption structures of p-benzyne, which is a typical diradical molecule, on MgO(001) and SrO(001) surfaces are used as models to investigate how the diradical character is affected by physisorption. This is done using approximate spin-projected density functional theory calculations with dispersion correction and plane-wave basis (AP-DFT-D3/plane-wave calculations). The diradical character change (Δy) due to adsorption can be categorised into three factors, namely the change due to the distortion of the diradical molecule (Δydis), the interaction between neighbouring diradical molecules (Δycoh), and molecule-surface interactions (Δysurf). In all the calculated models, physisorption reduced the diradical character (Δy < 0), and the contribution of Δysurf was the largest among the three factors. The calculated results show that adsorption induces electron delocalisation to π-conjugated orbitals and intramolecular charge polarisation, both of which contribute to reducing the occupancy of singly occupied molecular orbitals. This indicates that the diradical character of p-benzyne is reduced by the stabilisation of the resonance structures. Furthermore, geometry optimisation of the surfaces shows that the chemical-soft surface (SrO) varies the diradical character more significantly than the chemical-hard surface (MgO). This study shows that the open-shell electronic state and stack structure of diradical molecules can be controlled through the analysis of the surface diradical state. [ABSTRACT FROM AUTHOR]

Published
2023
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33. Diagnostic accuracy of lung subtraction iodine mapping CT for the evaluation of pulmonary perfusion in patients with chronic thromboembolic pulmonary hypertension: Correlation with perfusion SPECT/CT

Author

Tamura, Masashi, Yamada, Yoshitake, Kawakami, Takashi, Kataoka, Masaharu, Iwabuchi, Yu, Sugiura, Hiroaki, Hashimoto, Masahiro, Nakahara, Tadaki, Okuda, Shigeo, Nakatsuka, Seishi, Sano, Fumiya, Abe, Takayuki, Maekawa, Yuichiro, Fukuda, Keiichi, and Jinzaki, Masahiro

Published
2017
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36. Impact of Subclinical Vascular Complications Detected by Systematic Postprocedural Multidetector Computed Tomography After Transcatheter Aortic Valve Implantation Using Balloon-Expandable Edwards SAPIEN XT Heart Valve

Author

Kakefuda, Yuki, Hayashida, Kentaro, Yamada, Yoshitake, Yashima, Fumiaki, Inohara, Taku, Yanagisawa, Ryo, Tanaka, Makoto, Arai, Takahide, Kawakami, Takashi, Maekawa, Yuichiro, Tsuruta, Hikaru, Itabashi, Yuji, Murata, Mitsushige, Sano, Motoaki, Okamoto, Kazuma, Yoshitake, Akihiro, Shimizu, Hideyuki, Jinzaki, Masahiro, and Fukuda, Keiichi

Published
2017
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41. The Nature of the Chemical Bonds of High-Valent Transition–Metal Oxo (M=O) and Peroxo (MOO) Compounds: A Historical Perspective of the Metal Oxyl–Radical Character by the Classical to Quantum Computations.

Author

Yamaguchi, Kizashi, Isobe, Hiroshi, Shoji, Mitsuo, Kawakami, Takashi, and Miyagawa, Koichi

Subjects
QUANTUM computing, CHEMICAL bonds, MOLECULAR orbitals, OXYGEN, NATURAL orbitals, TRANSITION metals
Abstract

This review article describes a historical perspective of elucidation of the nature of the chemical bonds of the high-valent transition metal oxo (M=O) and peroxo (M-O-O) compounds in chemistry and biology. The basic concepts and theoretical backgrounds of the broken-symmetry (BS) method are revisited to explain orbital symmetry conservation and orbital symmetry breaking for the theoretical characterization of four different mechanisms of chemical reactions. Beyond BS methods using the natural orbitals (UNO) of the BS solutions, such as UNO CI (CC), are also revisited for the elucidation of the scope and applicability of the BS methods. Several chemical indices have been derived as the conceptual bridges between the BS and beyond BS methods. The BS molecular orbital models have been employed to explain the metal oxyl-radical character of the M=O and M-O-O bonds, which respond to their radical reactivity. The isolobal and isospin analogy between carbonyl oxide R2C-O-O and metal peroxide LFe-O-O has been applied to understand and explain the chameleonic chemical reactivity of these compounds. The isolobal and isospin analogy among Fe=O, O=O, and O have also provided the triplet atomic oxygen (3O) model for non-heme Fe(IV)=O species with strong radical reactivity. The chameleonic reactivity of the compounds I (Cpd I) and II (Cpd II) is also explained by this analogy. The early proposals obtained by these theoretical models have been examined based on recent computational results by hybrid DFT (UHDFT), DLPNO CCSD(T0), CASPT2, and UNO CI (CC) methods and quantum computing (QC). [ABSTRACT FROM AUTHOR]

Published
2023
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45. Environmental impacts on expansion of concrete due to alkali–silica reaction.

Author

Kawabata, Yuichiro, Yamada, Kazuo, Kawakami, Takashi, and Sagawa, Yasutaka

Subjects
EXPANSION & contraction of concrete, MATERIALS testing, CONCRETE testing, RAINFALL, HUMIDITY
Abstract

Environmental conditions critically affect the expansion behaviour of concrete due to alkali–silica reaction (ASR) and, therefore, must be modelled to predict ASR-induced expansion behaviour. In addition, laboratory tests are important for the provision of useful data for numerical models, since these models often require the calibration of some unknown parameters according to the materials tested. To address this, the authors have developed a testing method for concrete expansion, called the alkali-wrapped concrete prism test (AW-CPT). Predictions using the results of the AW-CPT would be beneficial for the assessment of potential expansion of concrete when exposed to the outdoor environment. In this study, the effects of environmental conditions on ASR-induced expansion behaviours are determined through exposure and laboratory tests. The environmental conditions are modelled and implemented in numerical simulations. The results indicate that solar insolation and rainfall are critical parameters for modelling the environmental conditions as well as ambient temperature and relative humidity. [ABSTRACT FROM AUTHOR]

Published
2023
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50. Response by Fujisawa et al to Letter Regarding Article, “Pulmonary Artery Denervation by Determining Targeted Ablation Sites for Treatment of Pulmonary Arterial Hypertension”

Author

Fujisawa, Taishi, Kataoka, Masaharu, Kawakami, Takashi, Isobe, Sarasa, Nakajima, Kazuaki, Kunitomi, Akira, Kashimura, Shin, Katsumata, Yoshinori, Nishiyama, Takahiko, Kimura, Takehiro, Nishiyama, Nobuhiro, Aizawa, Yoshiyasu, Murata, Mitsushige, Fukuda, Keiichi, and Takatsuki, Seiji

Published
2018
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