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Masayuki Kawano,Yuma Morimitsu,Yukari Oda,Daisuke Kawaguchi,Keiji Tanaka 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
A better understanding of the hierarchical dynamics of polymers on a solid surface is of importance for improving the material designs of polymer nanocomposites as well as thin film devices. We directly observed the thermal motion of isolated poly(tert-butyl methacrylate) (PtBMA) chains on hydrophobic and hydrophilic silicon substrates using atomic force microscopy. While the center-of-mass diffusion of chains was not observed on the hydrophobic hydrogen-passivated silicon substrate, such was on the hydrophilic hydroxy-terminated silicon substrate. The diffusion coefficient for chains on the hydrophilic substrate was (1.35 ± 0.08) x 10<SUP>-14</SUP> cm²·s<SUP>-1</SUP>. The mobility difference of PtBMA chains on the two substrates could be explained in terms of the difference of the interfacial free energy via the existence of the adsorbed water layer.
Radiotherapy for locally recurrent rectal cancer treated with surgery alone as the initial treatment
Tanaka, Hidekazu,Yamaguchi, Takahiro,Hachiya, Kae,Okada, Sunaho,Kitahara, Masashi,Matsuyama, Katsuya,Matsuo, Masayuki The Korean Society for Radiation Oncology 2017 Radiation Oncology Journal Vol.35 No.1
Purpose: Although the technical developments of radiotherapy have been remarkable, there are currently few reports on the treatment results of radiotherapy for local recurrence of rectal cancer treated with surgery alone as initial treatment in this three-dimensional conformal radiotherapy era. Thus, we retrospectively evaluated the treatment results of radiotherapy for local recurrence of rectal cancer treated with surgery alone as the initial treatment. Materials and Methods: Thirty-two patients who underwent radiotherapy were enrolled in this study. The dose per fraction was 2.0-3.5 Gy. Because the treatment schedule was variable, the biological effective dose (BED) was calculated. Results: Local control (LC) and overall survival (OS) rates from the completion of radiotherapy were calculated. The 1-, 2-, 3-, 4-, and 5-year LC rates were 51.5%, 24.5%, 19.6%, 19.6%, and 13.1%, respectively. LC rates were significantly higher for the high BED group (${\geq}75Gy_{10}$) than for the lower BED group (<$75Gy_{10}$). All patients who reported pain achieved pain relief. The duration of pain relief was significantly higher for the high BED group than for the lower BED group. The 1-, 2-, 3-, 4-, and 5-year OS rates were 82.6%, 56.5%, 45.2%, 38.7%, and 23.2%, respectively. There was a trend toward higher OS rates in with higher BED group compared to lower BED group. Conclusion: For patients with unresectable locally recurrent rectal cancer treated with surgery alone, radiotherapy is effective treatment. The prescribed BED should be more than $75Gy_{10}$, if the dose to the organ at risk is within acceptable levels.
Control Strategies of Active Power Line Conditioners in Single-Phase Circuits
Toshihiko Tanaka,Masayuki Okamoto,Eiji Hiraki 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
This paper deals with two control strategies for the active power line conditioners in single-phase circuits. The first one is a constant dc capacitor voltage control based strategy, which is commonly used in the active power line conditioners. Any detection blocks of the fundamental active, reactive, and harmonic components are not necessary in this method. Thus we offer the simplest way to compensate the fundamental reactive and harmonic currents on the source-side. The other is a reactive power control based strategy, which is with the correlation and cross-correlation coefficients between the feeder voltage and load current. Controlling the detected fundamental reactive component with the cross-correlation coefficient on the source-side reduces the capacity of the PWM inverter, which performs the active power line conditioners. The basic principles of the proposed control strategies are discussed in detail, and then applied to the single-phase active power line conditioners in single-phase based distribution systems. These sigle-phase distributin systems are used in the single-phase three-wire systems and electrified railways. The validity and excellent practicability of the proposed control strategies are confirmed by experimental results.
Yuki Tanaka,Hideo Dohra,Tomohiro Suzuki,Takeshi Kurokura,Masayuki Iigo,Fubito Toyama,Naoto Habu,Naotake Konno 한국유전학회 2017 Genes & Genomics Vol.39 No.12
The complete mitochondrial genome sequence of the wood-decaying fungus Fomitopsis palustris (Basidiomycete, Agaricomycotina) was determined by next-generation sequencing technology. The complete sequence of the circular mitochondrial DNA of F. palustris was 63,479 bp in length with a 75.98% AT content. The mitochondrial genome encoded 14 conserved proteins, 2 ribosomal RNAs, 26 transfer RNAs, and 19 additional open reading frames. The coxI and cob genes contained six and one group I introns, respectively, and encoded eight open reading frames, including seven intron-encoded endonucleases. The complete mitochondrial genome of F. palustris presented herein represents the first such report for brown rot basidiomycetes. In addition, the BLAST score ratio and phylogenetic analysis may open new avenues to understanding the evolutionary status of this fungus.