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Chitin Based Fuel Cell and Its Proton Conductivity

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Materials Sciences and Applications 2018年第10期9卷 779-789页

作者： takashi Kawabata Yasumitsu matsuo Department of Life Science Faculty of Science & Engineering Setsunan University Neyagawa Osaka Japan

We have fabricated a fuel cell based on the tissue-derived biomaterial “chitin”, and investigated its proton conductivity. It was found that chitin becomes the electrolyte of the fuel cell in the humidified condition, and power density of the fuel cell using chitin electrolyte becomes typically 1.35 mW/cm2 at the 100% relative humidity. This result is the first result showing that the polysaccharide obtained from nature becomes the fuel cell electrolyte. Moreover, this result indicates that chitin is proton conductor in the humidified condition. In the chitin sheet plane, proton conductivity in chitin is observed approximately 0.1 S/m. Further, it was also found that chitin has the anisotropic proton conductivity. The proton conductivity along the chitin fiber direction is higher than that perpendicular to the chitin fiber direction. From these results, it is deduced that the formation of water bridges accompanied by hydration plays an important role in the appearance of proton conductivity in chitin.

关键词： Fuel Cell Proton Conductor Electrolyte Biomaterials

Review to better understand the macroscopic subtypes and histogenesis of intrahepatic cholangiocarcinoma

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World Journal of Gastrointestinal Pathophysiology 2014年第3期5卷 188-199页

作者： Yuichi Sanada Yujo Kawashita Satomi Okada takashi Azuma Shigetoshi matsuo Department of Surgery Nagasaki Prefecture Shimabara Hospital

Intrahepatic cholangiocarcinoma is macroscopically classified into three subtypes, mass-forming-type, periductal infiltrating-type, and intraductal growth-type. Each subtype should be preoperatively differentiated to perform the valid surgical resection. Recent researches have revealed the clinical, radiologic, pathobiological characteristics of each subtype. We reviewed recently published studies covering various aspects of intrahepatic cholangiocarcinoma(ICC), focusing especially on the macroscopic subtypes and stem cell features to better understand the pathophysiology of ICC and to establish the valid therapeutic strategy.

关键词： Intrahepatic cholangiocarcinoma Combined hepatocellular-cholangiocarcinoma Hepatic progenitor cells Macroscopic subtype

Small bowel anisakiosis: A report of two cases

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World Journal of Gastroenterology 2006年第25期12卷 4106-4108页

作者： Shigetoshi matsuo takashi Azuma Seiya Susumu Satoshi Yamaguchi Shirou Obata Tomayoshi Hayashi Department of Surgery Nagasaki Prefectural Shimabara Hospital Japan Department of Radiology Nagasaki Prefectural Shimabara Hospital Japan Department of Pathology Nagasaki Prefectural Shimabara Hospital Japan

小肠狭窄是肠的 anisakiosis 的严肃的复杂并发症。这份报告的目的是调查小肠的严重狭窄是否能保存地被管理。我们与 anisakiosis 引起的小肠的严重狭窄对待二个病人。外科的干预最后被执行在上第 23 和第 35 在医院里分别地。 resected... 详细信息

小肠狭窄是肠的 anisakiosis 的严肃的复杂并发症。这份报告的目的是调查小肠的严重狭窄是否能保存地被管理。我们与 anisakiosis 引起的小肠的严重狭窄对待二个病人。外科的干预最后被执行在上第 23 和第 35 在医院里分别地。 resected 标本的组织病理学说的检查表明肠的墙被 anisakiosis 的炎性反应完全损坏了，并且损坏是不可逆的，从而建议那剖腹术在严重的小肠狭窄的情况下被需要由肠的 anisakiosis 引起了，就算为肠的 anisakiosis 的保守疗法的一个长时期允许病人通过尖锐阶段成功地过去。

关键词：小肠疾病肠狭窄治疗病理机制

Immunological milieu in the peritoneal cavity at laparotomy for gastric cancer

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World Journal of Gastroenterology 2012年第13期18卷 1470-1478页

作者： Akira Yoneda Shinichiro Ito Seiya Susumu Mitsutoshi matsuo Ken Taniguchi Yoshitsugu Tajima Susumu Eguchi takashi Kanematsu Yasuhiro Nagata Department of Surgery Nagasaki University Graduate School of Biomedical SciencesNagasaki 852-8051Japan Department of Surgery Yamaguchi Prefectural Medical CenterYamaguchi 747-8511Japan Department of Surgery National Hospital Organization Nagasaki Medical CenterNagasaki 856-8562Japan

AIM:To investigate the immunological repertoire in the peritoneal cavity of gastric cancer patients.METHODS:The peritoneal cavity is a compartment in which immunological host-tumor interactions can occur.However,the role of lymphocytes in the peritoneal cavity of gastric cancer patients is unclear.We observed 64 patients who underwent gastrectomy for gastric cancer and 11 patients who underwent laparoscopic cholecystectomy for gallstones and acted as controls.Lymphocytes isolated from both peripheral blood and peritoneal lavage were analyzed for surface markers of lymphocytes and their cytokine production by flow cytometry.CD4+CD25high T cells isolated from the patient's peripheral blood were co-cultivated for 4 d with the intra-peritoneal lymphocytes,and a cytokine assay was performed.RESULTS:At gastrectomy,CCR7 -CD45RA-CD8+ef-fector memory T cells were observed in the peritoneal cavity.The frequency of CD4+CD25 high T cells in both the peripheral blood and peritoneal cavity was elevated in patients at advanced stage[control vs stage Ⅳin the peripheral blood:6.89(3.39-10.4)vs 15.34(11.37-19.31),P<0.05,control vs stageⅣin the peritoneal cavity:8.65(5.28-12.0)vs 19.56(14.81-24.32),P<0.05].On the other hand,the suppression was restored with CD4+CD25high T cells from their own peripheral blood.This study is the first to analyze lymphocyte and cytokine production in the peritoneal cavity in patients with gastric cancer.Immune regulation at advanced stage is reversible at the point of gastrectomy.CONCLUSION:The immunological milieu in the peritoneal cavity of patients with advanced gastric cancer elicited a Th2 response even at gastrectomy,but this response was reversible.

关键词：免疫调节作用胃癌腹腔环境淋巴细胞探查剖腹细胞因子

Mucosa-associated lymphoid tissue lymphoma of the transverse colon: A case report

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World Journal of Gastroenterology 2006年第34期12卷 5573-5576页

作者： Shigetoshi matsuo Yohei Mizuta Tomayoshi Hayashi Seiya Susumu Ryuji Tsutsumi takashi Azuma Satoshi Yamaguchi Department of Surgery Nagasaki Prefectural Shimabara Hospital Shimabara Nagasaki Japan Second department of Internal medicine Nagasaki University School of Medicine Nagasaki Japan Department of Pathology Nagasaki Prefectural Shimabara Hospital Shimabara Nagasaki Japan

We herein present a case of a 75-year-old female with mucosa-associated lymphoid tissue (MALT) lymphoma of the transverse colon with the stage IE (Ann Arbor clas- sifi cation). Colonoscopy revealed the tumor’s appearance as a IIa plus ?Research Society for Cancer of Colon, Rectum and Anus, measuring less than 2 cm in diameter. Histologically, the tumor was diagnosed as MALT lymphoma because of the presence of lymphoepithelial lesions consisting of diffuse proliferation of atypical lymphocytes and glandular de- struction. The majority of these lymphocytes immunohis- tochemically stained for the B-lymphocyte marker. The patient fi rst underwent H pylori eradication therapy withLansap?. However, the tumor size gradually increased over the next 4 mo and the patient eventually underwent surgical resection. The operative procedure included a partial colectomy with dissection of the paracolic lymph nodes. The tumor measured 45 mm x 30 mm in diam- eter and histological examination showed that the lym- phoma cells had infi ltrated the muscle layer of the colon without nodal involvement. The patient has had no re- currence postoperatively without any chemotherapy.

关键词：淋巴组织黏膜结肠癌病理

Anomalous Proton Conductivity in Chitin-Chitosan Mixed Compounds

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Materials Sciences and Applications 2020年第1期11卷 1-11页

作者： takashi Kawabata Yusuke Takahashi Yasumitsu matsuo Department of Life Science Faculty of Science & Engineering Setsunan University Ikeda-Nakamachi Neyagawa Osaka Japan

In order to investigate a key factor for the appearance of proton conductivity in chitin-chitosan mixed compounds, the chitin-chitosan mixed compounds (chitin)x(chitosan)1-x were prepared and these proton conductivities have been investigated. DC proton conductivity σ is obtained from Nyquist plot of impedance measurement data, and the relationship between σ and mixing ratio x has been made clear. It was found that the x dependence of σ is non-monotonous. That is, σ shows the anomalous behavior, and has peaks around x = 0.4 and 0.75. This result indicates that there exist optimal conditions for the realization of high-proton conductivity in the chitin-chitosan mixed compound in which the number of acetyl groups is different. From the FT-IR measurement, we have found that the behavior of proton conductivity in (chitin)x(chitosan)1-x is determined by the amount of water content changed by x. Using these results, proton conductivity, which is important for the application of conducting polymers in chitin-chitosan mixed compounds, will be able to be easily controlled by adjusting the mixing ratio x.

关键词： Chitin Chitosan Mixed Compounds Proton Conductor Biomaterial

Smoking increases risk of tooth loss: A meta-analysis of the literature

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World Journal of Meta-Analysis 2013年第1期1卷 16-26页

作者： Fumihito Sato Masashi Sawamura Miki Ojima Keiko Tanaka takashi Hanioka Hideo Tanaka Keitaro matsuo Division of Epidemiology and Prevention Aichi Cancer Center Research Institute Nagoya Aichi 464-8618 Japan Department of Preventive Dentistry Graduate School of Dentistry Osaka University Suita Osaka 565-0871 Japan Department of Public Health Faculty of Medicine Fukuoka University Fukuoka 814-0180 Japan Department of Preventive and Public Health Dentistry Fukuoka Dental College Fukuoka 814-0193 Japan Department of Epidemiology Nagoya University Graduate School of Medicine Nagoya Aichi 464-8601 Japan

AIM: To quantitatively evaluate the impact of smoking on tooth loss.METHODS: We performed a Pub Med search to identify published articles that investigated the risk of tooth loss by smoking, from which RRs and their variance with characteristics of each study were extracted. The random-effects models were used to derive a pooled effect across studies. Potential sources of heterogeneity on the characteristics of the study and their influence on the pooled effect size were investigated using metaregression models. RESULTS: We identified 24 studies containing a total of 95973 participants for analysis. The pooled RR of ever-smokers compared with never- smokers was 1.73(95%CI: 1.60-1.86, P < 0.001). In meta-regression analysis, only the mean age of participants alone was identified as a statistically significant source of heterogeneity. The effect of smoking on tooth loss was stronger when the mean age of study participants was higher, indicating possible enhancement of tooth loss due to aging by smoking. RR was significantly lower in former smokers(1.49, 95%CI: 1.32-1.69, P < 0.001) than in current smokers(2.10, 95%CI: 1.87-2.35, P < 0.001), indicating the substantial benefit of smoking cessation for reducing the risk of tooth loss.CONCLUSION: Smoking is an independent risk factor for tooth loss regardless of many other confounders. Smoking cessation may attenuate this effect.

关键词： Meta-analysis Oral health Relative risk Smoking Tooth loss

Enhancement of Visual Attention by Color Revealed Using Electroencephalography

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Open Journal of Therapy and Rehabilitation 2024年第1期12卷 1-9页

作者： Moemi matsuo takashi Higuchi Takuya Ishibashi Ayano Egashira Toranosuke Abe Hiroya Miyabara Faculty of Rehabilitation Sciences Nishikyushu University Kanzaki Japan Department of Physical Therapy Osaka University of Human Sciences Settsu Japan

Attention constitutes a fundamental psychological feature guiding our mental effort toward specific objects, concurrent with processes such as memory, reasoning, and imagination. Visual attention, crucial for selecting surrounding information, often decreases in older adults and patients with cerebrovascular disorders. Effective methods to enhance attention are scarce. Here, we investigated whether color information influences visual attention and brain activity during task performance, utilizing EEG. We examined 13 healthy young adults (seven women and six men;mean age: 21.2 ± 0.58 years) using 19-electrode electroencephalograms to assess the impact of color information on visual attention. The Clinical Assessment for Attention cancellation test was conducted under the black, red, and blue color conditions. Wilcoxon’s signed-rank test was used to assess differences in task performance (task time and error) between conditions. Spearman’s rank correlation was utilized to examine the correlation in power levels between task performance and color conditions. Significant variations in total task errors were observed among color conditions. The black condition exhibited the highest error frequency (0.7 ± 0.9 times), followed by the red condition (0.5 ± 0.8 times), with the lowest error frequency occurring in the blue (0.2 ± 0.4 times) condition (black vs. red: P = 0.03;black vs. blue: P = 0.00;red vs. blue: P = 0.032). No time difference was observed. The black condition showed negative delta and high-gamma correlations in the central electrodes. The red condition revealed positive alpha and low-gamma correlations in the frontal and occipital areas. Although no correlations were observed in the blue condition, it enhanced attentional performance. Positive alpha and low-gamma waves might be crucial for spotting attentional errors in key areas. Our findings provide insights into the effects of color information on visual attention and potential neural correlates associated with attentional processes. In conclusion, our

关键词： Attention Higher Brain Function Electroencephalography Neuroimaging Rehabilitation

Electroencephalogram Signal Correlations between Default Mode Network and Attentional Functioning

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Journal of Behavioral and Brain Science 2024年第4期14卷 119-134页

作者： Moemi matsuo takashi Higuchi Toranosuke Abe Takuya Ishibashi Ayano Egashira Rio Kamashita Faculty of Rehabilitation Sciences Nishi Kyushu University Kanzaki Japan Department of Physical Therapy Osaka University of Human Sciences Settsu Japan Research Center for Child Mental Development Chiba University Chiba Japan

Attentional issues may affect acquiring new information, task performance, and learning. Cortical network activities change during different functional brain states, including the default mode network (DMN) and attention network. We investigated the neural mechanisms underlying attentional functions and correlations between DMN connectivity and attentional function using the Trail-Making Test (TMT)-A and -B. Electroencephalography recordings were performed by placing 19 scalp electrodes per the 10 - 20 system. The mean power level was calculated for each rest and task condition. Non-parametric Spearman’s rank correlation was used to examine the correlation in power levels between the rest and TMT conditions. The most significant correlations during TMT-A were observed in the high gamma wave, followed by theta and beta waves, indicating that most correlations were in the parietal lobe, followed by the frontal, central, and temporal lobes. The most significant correlations during TMT-B were observed in the beta wave, followed by the high and low gamma waves, indicating that most correlations were in the temporal lobe, followed by the parietal, frontal, and central lobes. Frontoparietal beta and gamma waves in the DMN may represent attentional functions.

关键词： Cortical Network Activities Electroencephalography Attention Default Mode Network