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Your search keyword '"Yanagida, Masatoshi"' showing total 145 results
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145 results on '"Yanagida, Masatoshi"'

3. Activation of NOTCH signaling impedes cell proliferation and survival in acute megakaryoblastic leukemia

Author

Ong, Kelly Ooi Kee, Mok, Michelle Meng Huang, Niibori-Nambu, Akiko, Du, Linsen, Yanagida, Masatoshi, Wang, Chelsia Qiuxia, Bahirvani, Avinash Govind, Chin, Desmond Wai Loon, Koh, Cai Ping, Ng, King Pan, Yamashita, Namiko, Jacob, Bindya, Yokomizo, Tomomasa, Takizawa, Hitoshi, Matsumura, Takayoshi, Suda, Toshio, Lau, Jie-ying Amelia, Tan, Tuan Zea, Mori, Seiichi, Yang, Henry, Iwasaki, Masayuki, Minami, Takashi, Asou, Norio, Sun, Qiao-Yang, Ding, Ling-Wen, Koeffler, H. Phillip, Tenen, Daniel G., Shimizu, Ritsuko, Yamamoto, Masayuki, Ito, Yoshiaki, Kham, Shirley Kow Yin, Yeoh, Allen Eng-Juh, Chng, Wee Joo, and Osato, Motomi

Published
2024
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4. Automated immunoassay of serum NY-ESO-1 and XAGE1 antibodies for predicting clinical benefit with immune checkpoint inhibitor (ICI) in advanced non-small cell lung cancer

Author

Sakaeda, Kanako, Kurose, Koji, Matsumura, Yuki, Muto, Satoshi, Fukuda, Minoru, Sugasaki, Nanae, Fukuda, Masaaki, Takemoto, Shinnosuke, Taniguchi, Hirokazu, Masuda, Takeshi, Shimizu, Katsuhiko, Kataoka, Yuki, Irino, Yasuhiro, Sakai, Yumiko, Atarashi, Yusuke, Yanagida, Masatoshi, Hattori, Noboru, Mukae, Hiroshi, Nakata, Masao, Kanda, Eiichiro, Oga, Toru, Suzuki, Hiroyuki, and Oka, Mikio

Published
2024
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13. Advancing Efficiency and Stability of Lead, Tin, and Lead/Tin Perovskite Solar Cells: Strategies and Perspectives.

Author

Khadka, Dhruba B., Shirai, Yasuhiro, Yanagida, Masatoshi, Ryan, James W., Song, Zhaoning, Barker, Bobby G., Dhakal, Tara P., and Miyano, Kenjiro

Subjects
SOLAR cells, PEROVSKITE, PHOTOVOLTAIC power systems, TIN, METAL halides, CRYSTAL structure
Abstract

Halide‐perovskite‐based solar cells (HPSCs) have established themselves as a promising photovoltaic (PV) technology in a remarkably short time. The rapid improvement in HPSCs can be attributed to the unique material and optoelectronic properties of metal halide perovskite semiconductors coupled with a very knowledgeable and experienced PV community. This review briefly summarizes the chemistry of halide perovskites, delving into the fundamental aspects of crystal structure and optical bandgap, followed by a more in‐depth report on the advancements in HPSCs efficiencies, thanks to structural regulation, interfacial modulation, and thin‐film engineering. It is mainly focused on three metal halide perovskites topics: 1) high‐performance Pb‐based perovskites, 2) Sn‐based perovskites and their associated challenges, and 3) emerging work on mixed composition Pb–Sn perovskites. For each of these domains, the effects stemming from the tuning of the monovalent A‐site and the halide site are examined. Additionally, various approaches aimed at passivating defects in the bulk film and at the interface, along with carrier transport engineering, are discussed. The discussions also encompass the broader implications for device performance, stability, and material toxicity. Finally, perspectives on the future directions and the commercial feasibility of perovskite photovoltaic technologies are provided. [ABSTRACT FROM AUTHOR]

Published
2023
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22. Hybrid double-spiral microfluidic chip for RBC-lysis-free enrichment of rare cells from whole blood.

Author

Shirai, Kentaro, Guan, Guofeng, Meihui, Tan, Xiaoling, Peng, Oka, Yuma, Takahashi, Yusuke, Bhagat, Ali Asgar S., Yanagida, Masatoshi, Iwanaga, Shigeki, Matsubara, Nobuaki, Mukohara, Toru, and Yoshida, Tomokazu

Subjects
LEUCOCYTES, METASTATIC breast cancer, BLOOD cells, CANCER cells, PROSTATE cancer patients, CELL separation, ERYTHROCYTES
Abstract

Drug selection and treatment monitoring via minimally invasive liquid biopsy using circulating tumor cells (CTCs) are expected to be realized in the near future. For clinical applications of CTCs, simple, high-throughput, single-step CTC isolation from whole blood without red blood cell (RBC) lysis and centrifugation remains a crucial challenge. In this study, we developed a novel cancer cell separation chip, "hybrid double-spiral chip", that involves the serial combination of two different Dean flow fractionation (DFF) separation modes of half and full Dean cycles, which is the hybrid DFF separation mode for ultra-high-throughput blood processing at high precision and size-resolution separation. The chip allows fast processing of 5 mL whole blood within 30 min without RBC lysis and centrifugation. RBC and white blood cell (WBC) depletion rates of over 99.9% and 99%, respectively, were achieved. The average recovery rate of spiked A549 cancer cells was 87% with as low as 200 cells in 5 mL blood. The device can achieve serial reduction in the number of cells from approximately 1010 cells of whole blood to 108 cells, and subsequently to an order of 106 cells. The developed method can be combined with measurements of all recovered cells using imaging flow cytometry. As proof of concept, CTCs were successfully enriched and enumerated from the blood of metastatic breast cancer patients (N = 10, 1–69 CTCs per 5 mL) and metastatic prostate cancer patients (N = 10, 1–39 CTCs per 5 mL). We believe that the developed method will be beneficial for automated clinical analysis of rare CTCs from whole blood. [ABSTRACT FROM AUTHOR]

Published
2022
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23. Interfacial Embedding for High‐Efficiency and Stable Methylammonium‐Free Perovskite Solar Cells with Fluoroarene Hydrazine.

Author

Khadka, Dhruba B., Shirai, Yasuhiro, Yanagida, Masatoshi, Tadano, Terumasa, and Miyano, Kenjiro

Subjects
SOLAR cells, SURFACE passivation, PEROVSKITE, SURFACE chemistry, SURFACE preparation
Abstract

Perovskite solar cells (PSCs) with state‐of‐the‐art efficiencies contain thermally unstable methylammonium (MA). Here, interfacial passivation with pentafluorophenylhydrazine (5F‐PHZ) to fabricate efficient and stable MA/Br‐free PSCs is introduced. The 5F‐PHZ surface treatment quenches the PbI2 and δ‐perovskite phase formed in the pristine film. The surface passivation ameliorates the film chemistries at the surface with modulation of interface band alignment as a consequence of halogen bonding with fluoroarene moieties or NH–NH2 terminals. This results in a much longer carrier lifetime with the passivation at the surface and grain boundaries trap centers. As a result, it boosts the power conversion efficiency (PCE) (area ≈ 1 cm2) from 18.10% to 22.29% (VOC ≈ 1.096–1.178 V) with superior operational thermal stability. A certified PCE of 21.01% with a large area of ≈1.026 cm2 is also achieved. It is found that the surface passivation forms an interfacial embedded layer subsequent to attenuation of defect densities and suppression of ion migration, which is supported by density‐function‐theory calculation. Importantly, this approach is effective in enhancing the PCE of narrow and wide bandgap perovskite systems. Thus, this work opens up a new technique for interface modulation with fluoroarene functional derivatives to achieve superior device performance and stability. [ABSTRACT FROM AUTHOR]

Published
2022
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35. Dye sensitization of nanocrystalline titanium dioxide with square planar platinum(II) diimine dithiolate complexes

Author

Islam, Ashraful, Sugihara, Hideki, Hara, Kohjiro, Singh, Lok Pratap, Katoh, Ryuzi, Yanagida, Masatoshi, Takahashi, Yoshiaki, Murata, Shigeo, Arakawa, Hinori, and Fujihashi, Gaku

Subjects
Chemistry, Inorganic -- Research, Dyes and dyeing -- Chemistry, Platinum -- Physiological aspects, Titanium -- Physiological aspects, Oxides -- Physiological aspects, Chemistry
Abstract

Research has been conducted on the platinum-based sensitizers. The synthesis of these sensitizers with different ground-state oxidation potentials has been carried out and anchored to the nanocrystalline titanium dioxide electrodes for the light-to-electricity conversion.

Published
2001

43. Concerted Ion Migration and Diffusion‐Induced Degradation in Lead‐Free Ag3BiI6 Rudorffite Solar Cells under Ambient Conditions.

Author

Kulkarni, Ashish, Ünlü, Feray, Pant, Namrata, Kaur, Jagjit, Bohr, Christoph, Jena, Ajay Kumar, Öz, Senol, Yanagida, Masatoshi, Shirai, Yasuhiro, Ikegami, Masashi, Miyano, Kenjiro, Tachibana, Yasuhiro, Chakraborty, Sudip, Mathur, Sanjay, and Miyasaka, Tsutomu

Subjects
SOLAR cells, ION migration & velocity, SILVER iodide, PHOTOVOLTAIC power systems, THIN films, OPTOELECTRONICS
Abstract

Silver bismuth iodide (SBI) materials have recently gained attention as nontoxic alternatives to lead perovskites. Although most of the studies have been focusing on photovoltaic performance, the inherent ionic nature of SBI materials, their diffusive behavior, and influence on material/device stability is underexplored. Herein, AgBi2I7, Ag2BiI5, and Ag3BiI6 thin films are developed in controlled ambient humidity conditions with a decent efficiency up to 2.32%. While exploring the device stability, it is found that Ag3BiI6 exhibits a unique ion‐migration behavior where Ag+, Bi3+, and I− ions migrate and diffuse through the dopant‐free hole transport layer (HTL) leading to degradation. Interestingly, this ion‐migration behavior is relatively fast for the case of antisolvent‐processed Ag3BiI6 thin‐film‐based devices contrasting the case of without antisolvent and is not observed for other SBI material‐based devices. Theoretical calculations suggest that low decomposition enthalpy favors the decomposition of Ag3BiI6 to AgI and BiI3 causing migration of ions to the electrode which is protected by using a thick HTL. The new mechanism reported herein underlines the importance of SBI material composition and fundamental mechanism understanding on the stability of Ag3BiI6 material for better solar cell design and also in extending the applications of unique ion‐migration behavior in various optoelectronics. [ABSTRACT FROM AUTHOR]

Published
2021
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44. Electron transport in coumarin-dye-sensitized nanocrystalline TiO(sub 2) electrodes

Author

Hara, Kohjiro, Miyamoto, Koji, Abe, Yoshimoto, and Yanagida, Masatoshi

Subjects
Electron transport -- Analysis, Titanium dioxide -- Atomic properties, Coumarins -- Chemical properties, Chemicals, plastics and rubber industries
Abstract

The electron transport kinetics in terms of electron diffusion coefficient (D) and electron lifetime (tau) in coumarin-dye-sensitized nanocrystalline TiO(sub 2) electrodes by intensity-modulated photocurrent spectroscopy (IMPS) and intensity-modulated photovoltage spectroscopy (IMVS) was investigated. It suggests from the investigation that the molecular structure of the absorbed dyes also affects the kinetics of electron transport in the TiO(sub 2) electrodes.

Published
2005

45. In vitro analyses of known and novel RUNX1/AML1 mutations in dominant familial platelet disorder with predisposition to acute myelogenous leukemia: implications for mechanisms of pathogenesis

Author

Michaud, Joëlle, Wu, Feng, Osato, Motomi, Cottles, Gregory M., Yanagida, Masatoshi, Asou, Norio, Shigesada, Katsuya, Ito, Yoshiaki, Benson, Kathleen F., Raskind, Wendy H., Rossier, Colette, Antonarakis, Stylianos E., Israels, Sara, McNicol, Archie, Weiss, Harvey, Horwitz, Marshall, and Scott, Hamish S.

Published
2002
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