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Tetramethylammonium Iodide Additive for Enhancing the Charge Carrier Mobilities of Diketopyrrolopyrrole-Based Conju-gated Polymer in Ambipolar Organic Field-Effect Transistors

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Chinese Journal of Chemistry 2023年第9期41卷 1028-1036页

作者： Waner He Qian Liu Sultan Otep hidetoshi matsumoto Sergei Manzhos Prashant Sonar Aung Ko Ko Kyaw Tsuyoshi Michinobu Department of Materials Science and Engineering Tokyo Institute of TechnologyTokyo 152-8552Japan Guangdong University Key Laboratory for Advanced Quantum Dot Displays Department of Electrical and Electronic EngineeringSouthern University of Science and TechnologyShenzhenGuangdong 518055China Center for Materials Science School of Chemistry and PhysicsFaculty of ScienceQueensland University of TechnologyBrisbaneQLD 4000Australia School of Materials and Chemical Technology Tokyo Institute of TechnologyTokyo 152-8552Japan

Diketopyrrolopyrrole(DPP)is one of the most promising building blocks for constructing polymer semiconductors with high charge-carrier mobilities in organic field-effect transistors(OFETs).In this study,a novel DPP-based conjugated polymer,PDPPy-BDD,was designed and *** ambipolar field-effect transistor characteristics were realized with the average hole and electron mobilities of 3.5×10^(-3)and 3.07×10^(-2)cm^(2)V^(-1)s^(-1),*** the hole and electron mobilities could be successfully en-hanced by using a tetramethylammonium iodide(NMe4l)*** an enhancement was attributed to the formation of stronger interchainπ-πstackings,the weakening of the face-on packing orientation in the thin film state,and the higher channel conductivi-ties in the OFETs.

关键词： Diketopyrrolopyrrole Pyridine Charge transport Conjugated polymers Organic field-effect transistors Semiconductors Tetramethylammonium iodide Thin films

Laparoscopic repair of diaphragmatic hernia associating with radiofrequency ablation for hepatocellular carcinoma:A case report

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World Journal of Clinical Cases 2022年第20期10卷 7020-7028页

作者： Junya Tsunoda Tomohiko Nishi Takafumi Ito Gaku Inaguma Tomohiko Matsuzaki Hiroaki Seki Nobutaka Yasui Michio Sakata Akihiko Shimada hidetoshi matsumoto Department of Surgery Keiyu HospitalYokohama 220-8521Japan Department of Internal Medicine Keiyu HospitalYokohama 220-8521Japan

BACKGROUND Radiofrequency ablation(RFA)is an effective treatment for early-stage hepatocellular carcinoma(HCC).Although RFA is a relatively safe technique compared with surgery,several complications have been reported to be following/accompanying this *** diaphragmatic hernia caused by RFA is rare;however,the best surgical approach for its treatment is *** present a case of laparoscopic repair of diaphragmatic hernia due to *** SUMMARY An 80-year-old woman with segment VIII HCC was treated twice in 5 years with RFA;28 mo after the second RFA,the patient complained of right hypochondriac *** tomography revealed that the small intestine was incarcerated in the right *** patient was diagnosed with diaphragmatic hernia and underwent laparoscopic repair by non-absorbable running *** patient’s postoperative course was favorable,and the patient was discharged on postoperative day *** diaphragmatic hernia has not recurred 24 mo after *** Laparoscopic treatment of iatrogenic diaphragmatic hernia is effective and minimally invasive.

关键词： Diaphragmatic hernia Radiofrequency ablation Hepatocellular carcinoma Complication Laparoscopic surgery Case report

Utility of plasma D-dimer for diagnosis of venous thromboembolism after hepatectomy

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World Journal of Clinical Cases 2024年第2期12卷 276-284页

作者： Taiichiro Miyake Hiroaki Yanagimoto Daisuke Tsugawa Masayuki Akita Riki Asakura Keisuke Arai Toshihiko Yoshida Shinichi So Jun Ishida Takeshi Urade Yoshihide Nanno Kenji Fukushima hidetoshi Gon Shohei Komatsu Sadaki Asari Hirochika Toyama Masahiro Kido Tetsuo Ajiki Takumi Fukumoto Division of Hepato-Biliary-Pancreatic Surgery Department of SurgeryKobe University Graduate School of MedicineKobe 650-0017HyogoJapan

BACKGROUND Venous thromboembolism(VTE)is a potentially fatal complication of *** use of postoperative prophylactic anticoagulation in patients who have undergone hepatectomy is controversial because of the risk of postoperative ***,we hypothesized that monitoring plasma D-dimer could be useful in the early diagnosis of VTE after *** To evaluate the utility of monitoring plasma D-dimer levels in the early diagnosis of VTE after *** The medical records of patients who underwent hepatectomy at our institution between January 2017 and December 2020 were retrospectively *** were divided into two groups according to whether or not they developed VTE after hepatectomy,as diagnosed by contrast-enhanced computed tomography and/or ultrasonography of the lower *** factors,including demographic data and perioperative D-dimer values,were compared between the two *** operating characteristic curve analysis was performed to determine the D-dimer cutoff *** and multivariate analyses were performed using logistic regression analysis to identify significant *** In total,234 patients who underwent hepatectomy were,of whom(5.6%)were diagnosed with VTE following hepatectomy.A comparison between the two groups showed significant differences in operative time(529 vs 403 min,P=0.0274)and blood loss(530 vs 138 mL,P=0.0067).The D-dimer levels on postoperative days(POD)1,3,5,7 were significantly higher in the VTE group than in the non-VTE *** the multivariate analysis,intraoperative blood loss of>275 mL[odds ratio(OR)=5.32,95%confidence interval(CI):1.05-27.0,P=0.044]and plasma D-dimer levels on POD 5≥21μg/mL(OR=10.1,95%CI:2.04-50.1,P=0.0046)were independent risk factors for VTE after *** Monitoring of plasma D-dimer levels after hepatectomy is useful for early diagnosis of VTE and may avoid routine prophylactic anticoagulation in the

关键词： Hepatectomy Malignant tumor Postoperative complication D-dimer Early diagnosis Venous thromboembolism

RANKL^(+) senescent cells under mechanical stress: a therapeutic target for orthodontic root resorption using senolytics

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International Journal of Oral Science 2023年第2期15卷 278-290页

作者： Yue Zhou Aki Nishiura hidetoshi Morikuni Wenqi Deng Toru Tsujibayashi Yoshihiro Momota Yuki Azetsu Masamichi Takami Yoshitomo Honda Naoyuki matsumoto Department of Orthodontics Osaka Dental UniversityHirakataOsakaJapan Department of Physics Osaka Dental UniversityHirakataOsakaJapan Department of Anesthesiology Osaka Dental UniversityHirakataOsakaJapan Department of Pharmacology Showa University School of Dentistry1-5-8HatanodaiShinagawakuTokyoJapan Department of Oral Anatomy Osaka Dental University8-1 KuzuhahanazonochoHirakataOsakaJapan

In dentistry,orthodontic root resorption is a long-lasting issue with no effective treatment strategy,and its mechanisms,especially those related to senescent cells,remain largely ***,we used an orthodontic intrusion tooth movement model with an L-loop in rats to demonstrate that mechanical stress-induced senescent cells aggravate apical root resorption,which was prevented by administering senolytics(a dasatinib and quercetin cocktail).

关键词： stress therapeutic ortho

Flat friction stir spot welding of low carbon steel by double side adjustable tools

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Journal of Materials Science & Technology 2021年第7期66卷 1-9页

作者： Xiaopei Wang Yoshiaki Morisada hidetoshi Fujii Joining and Welding Research Institute Osaka University11-1 MihogaokaIbarakiOsaka 567-0047Japan

2 mm low carbon steel plates were successfully welded by the flat friction stir spot welding(FSSW) using double side adjustable tools, by which the keyhole formed in the conventional FSSW was eliminated and a flat surface on both the top and bottom sides of the welded joints was obtained. In addition, the hook shape usually generated in the conventional FSSW was eliminated by this technique, and the unbonded interface was parallel to the surface of the sheets. Owing to the enlarged bonded interface width by eliminating the keyhole and the intermixed interface by the adjustable probe, the plug fracture occurred under all the welding conditions in the present study. Due to the suppression of the thickness thinning and elimination of the hook shape, the joint performance was improved in the plug fracture mode. The shear tensile performance was considered to strongly depend on the microstructure in the tip area of the unbonded interface and the maximum shear fracture load of 23.0 kN was achieved in this study.

关键词： Friction stir spot welding Interface structure Low carbon steel Mechanical properties Microstructure

Interface strengthening in dissimilar double-sided friction stir spot welding of AZ31/ZK60 magnesium alloys by adjustable probes

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Journal of Materials Science & Technology 2021年第26期85卷 158-168页

作者： Xiaopei Wang Yoshiaki Morisada hidetoshi Fujii Joining and Welding Research Institute Osaka University11-1 MihogaokaIbarakiOsaka 567-0047Japan

Dissimilar welding of AZ31/ZK60 magnesium alloys with a thickness of 2 mm was successfully carried out by the double-sided friction stir spot welding with adjustable probes.A dissimilar joint bearing flat surfaces on both sides without a keyhole was obtained and the shear failure load of 8.7±0.5 kN was *** role of the adjustable probes has been revealed in *** the center of the stir zone,the welding interface structure was heterogeneous around which some distinct oxides still remained,leading to a weak interface *** the contrary,the welding interface structure around the shoulder/probe interface was homogeneous with no oxides giving rise to a strong interface strength,which is attributed to the severe material flow introduced by the adjustable *** addition,the vicinity outside the shoulder/probe interface,where the fracture occurred during the shear tensile tests,was also strengthened owing to the shearing and torsion by the adju stable ***,a stable plug failure can be obtained and the joint properties can be improved.

关键词： Friction stir spot welding Dissimilar welding Interface strengthening Microstructure Magnesium alloys

On the Live Coloration and Partial Mitochondrial DNA Sequences in the Topotypic Population of Goniurosaurus kuroiwae orientalis(Squamata: Eublepharidae), with Description of a New Subspecies from Tokashikijima Island, Ryukyu Archipelago, Japan

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Asian Herpetological Research 2017年第2期18卷 96-107页

作者： Masanao HONDA hidetoshi OTA Faculty of Life and Environmental Sciences University of Tsukuba Institute of Natural and Environmental Sciences University of Hyogo and Museum of Nature and Human Activities

Careful investigations of live coloration and other characters in the eublepharid gecko Goniurosaurus kuroiwae orientalis from Tonakijima Island, the type locality of the subspecies in the Central Ryukyus, Japan, revealed its slight but consistent external differences from the consubspecific Tokashikijima population, whose phylogenetically divergent status against the former had been strongly suggested in a previous molecular study. A new subspecies, Goniurosaurus kuroiwae sengokui subsp. nov., is thus described for the Tokashikijima population. In life, Goniurosaurus k. sengokui subsp. nov. can be discriminated from G. k. orientalis in showing tint of reddish or pinkish, instead of yellowish, coloration in dorsal body pattern, and also usually darker and more or less reddish, instead of yellowish or grayish, iris in both adults and juveniles. Recalculation of sequence data at hand with relevant Gen Bank data confirmed substantial sequence divergences of G. k. sengokui from all other congeneric taxa of the Ryukyus described so far.

关键词： Eublepharidae Goniurosaurus morphology taxonomy Ryukyu Archipelago

Weld Shape Variation and Electrode Oxidation Behavior under Ar-(Ar-CO_2) Double Shielded GTA Welding

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Journal of Materials Science & Technology 2010年第2期26卷 170-176页

作者： Shanping Lu hidetoshi Fujii Kiyoshi Nogi Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of ScienceShenyang 110016 China Joining and welding Research Institute Osaka University Osaka 567-0047 Japan

Double shielded gas tungsten arc welding （GTAW, also known as tungsten inert gas （TIG） welding） of an SUS304 stainless steel with pure inert argon as the inner layer shielding and the At-CO2 or CO2 active gas as the out layer shielding was proposed in this study to investigate its effect on the tungsten electrode protection and the weld shape variation. The experimental results showed that the inner inert argon gas can successfully prevent the outer layer active gas from contacting and oxidizing the tungsten electrode during the welding process. Active gas, carbon dioxide, in the outer layer shielding is decomposed in the arc and dissolves in the liquid pool, which effectively adjusts the active element, oxygen, content in the weld metal. When the weld metal oxygen content is over 70×10-6, the surface-tension induced Marangoni convection changes from outward into inward, and the weld shape varies from a wide shallow one to a narrow deep one. The effect of the inner layer gas flow rate on the weld bead morphology and the weld shape was investigated systematically. The results show that when the flow rate of the inner argon shielding gas is too low, the weld bead is easily oxidized and the weld shape is wide and shallow. A heavy continuous oxide layer on the liquid pool is a barrier to the liquid pool movement.

关键词： Double shielding Weld shape Marangoni convection Gas tungsten arc welding

Effect of Ca addition on the microstructure and the mechanical properties of asymmetric double-sided friction stir welded AZ61 magnesium alloy

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Journal of Magnesium and Alloys 2020年第1期8卷 91-102页

作者： Mengran Zhou Yoshiaki Morisada hidetoshi Fujii Joining and Welding Research Institute(JWRI) Osaka UniversityJapan

The effects of 2%Ca addition on the microstructure and the mechanical properties of the asymmetric double-sided friction stir welded magnesium alloy AZ61 were *** to the Ca-free AZ61magnesium alloy,the addition of 2%Ca significantly refines the grains in the stir zone after *** to the existence of thermally stable Al2Ca particles,there is no noticeable change in the grain size in the stir zone regardless of the welding heat *** electron backscattered diffraction analysis at the center of the stir zone confirmed the significant deterioration of the(0001)texture strength from the addition of 2%*** tensile test of the joint suggested that the addition of 2%Ca provides stable tensile properties to the joint regardless of the welding *** critical(0001)texture strength that determines the ultimate tensile strength decreased from 20 to 15 by the Ca *** addition of Ca enhanced the deterioration of the plastic elongation when the(0001)texture strength increased.

关键词： Mg alloy Friction stir welding Microstructure Mechanical properties Texture