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Improvement of strength and ductility synergy in a room-temperature stretch-formable Mg-Al-Mn alloy sheet by twin-roll casting and low-temperature annealing

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Journal of Magnesium and Alloys 2022年第4期10卷 1066-1074页

作者： T.Nakata C.Xu k.kaibe Y.Yoshida k.Yoshida S.kamado Nagaoka University of Technology 1603-1KamitomiokaNagaoka 940-2188Japan School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001China Sumitomo Electric Industries Ltd.1-1-1 KoyakitaItami 664-0016Japan

Strength and ductility synergy in an Mg-3mass%Al-Mn(AM30)alloy sheet was successfully improved via twin-roll casting and annealing at low-temperature.An AM30 alloy sheet produced by twin-roll casting,homogenization,hot-rolling,and subsequent annealing at 170℃ for 64 h exhibits a good 0.2%proof stress of 170 MPa and a large elongation to failure of 33.1%along the rolling direction.The sheet also shows in-plane isotropic tensile properties,and the 0.2%proof stress and elongation to failure along the transverse direction are 176 MPa and 35.5%,respectively.Though the sheet produced by direct-chill casting also shows moderate strengths if the annealing condition is same,the direct-chill casting leads to the deteriorated elongation to failure of 23.9%and 30.0%for the rolling and transverse directions,respectively.As well as such excellent tensile properties,a high room-temperature stretch formability with an Index Erichsen value of 8.3 mm could be obtained in the twin-roll cast sheet annealed at 170℃ for 64 h.The annealing at a higher temperature further improves the stretch formability;however,this results in the decrease of the tensile properties.Microstructure characterization reveals that the excellent combination of strengths,ductility,and stretch formability in the twin-roll cast sheet annealed at the low-temperature annealing is mainly attributed to the uniform recrystallized microstructure,fine grain size,and circular distribution of(0001)poles away from the normal direction of the sheet.

关键词： Magnesium Rolling Tensile property Room temperature formability Twinning

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Operative Benefits of Artificial Pneumothorax in Thoracoscopic Esophagectomy in the Left Lateral Decubitus Position for Esophageal Cancer

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International Journal of Clinical Medicine 2015年第12期6卷 967-974页

作者： Masashi Takemura Nobuaki kaibe Mamiko Takii Mitsuru Sasako Department of Upper Gastrointestinal Surgery Hyogo Collage of Medicine Hyogo Japan

Objectives: This study aimed to evaluate operative benefits of artificial pnuemothorax in thoracoscopic esophagectomy in the left lateral decubitus position. Methods: We retrospectively analyzed short-term surgical outcomes including learning curve of 60 consecutive patients who underwent thoracoscopic esophagectomy with artificial pnuemothorax in the left lateral decubitus position between April 2010 and November 2012 in our department. Results: The median operation time and intraoperative blood loss were 443 min and 220 ml, respectively, and these values were 174 min and 95 ml, respectively, in the thoracic phase of surgery. The median number of harvested lymph node was 37. Only 1 patient required conversion to open esophagectomy. The postoperative 30-day mortality rate was 1.7%. The thoracic operation time significantly decreased after an experience of 10 cases and intraoperative blood loss during thoracic phasesignificantly decreased after an experience of 20 cases (p < 0.05), and operation time remained constant for the following cases. The number of harvested lymph nodes did not exhibit significant changes with an increase in the number of case experienced. Conclusions: Artificial pneumothorax provided the shorting of learning curve at the thoracoscopic esophagectomy in the left lateral decubitus position.

关键词： Thoracoscopic Esophagectomy Artificial Pneumothorax Left Lateral Position

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Short Term Operative Outcomes of Laparoscopic Gastric Mobilization in Esophagectomy for Esophageal Cancer: Comparison with Hand Assisted Technique

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Surgical Science 2016年第7期7卷 279-285页

作者： Masashi Takemura Mamiko Takii Nobuaki kaibe Tsutomu Oshima Mitsuru Sasako Department of Upper Gastrointestinal Surgery Hyogo College of Medicine Hyogo Japan

Objective: This study evaluated the safety and operative utilities of the laparoscopic gastric mobilization compared with hand-assisted laparoscopic gastric mobilization. Patients and Methods: From April 2010 to November 2015, 125 patients with esophageal cancer have been performed laparoscopic mobilization;33 under hand-assisted laparoscopic gastric mobilization (HLG group) and 92 under laparoscopic gastric mobilization without hand-assisted technique (LG group). Preoperative data and surgical outcomes of 2 groups were compared. Results: Preoperative data were not significantly different except for BMI. Operation time in abdominal procedure of LG group is significantly longer than HLG group (P < 0.0001). Otherwise, the blood loss and number of dissected nodes of abdominal procedure was not significantly different in two groups. The perioperative blood transfusions were needed in 7 cases (21.2%) in HLG group and 25 (27.1%) in LG group. The postoperative complications and mortality within 30 days after surgery were not significantly different in two groups. The length of hospital stay was 29 days in HLG group and 31 days in HG group, respectively. Conclusions: Our results suggested that laparoscopic gastric mobilization was safe technique and the short-term operative outcomes were comparable with that of hand-assisted laparoscopic mobilization.

关键词： Laparoscopic Gastric Mobilization Minimally Invasive Esophagectomy Esophageal Cancer

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Diffuse gastroduodenitis and pouchitis associated with ulcerative colitis

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World Journal of Gastroenterology 2006年第36期12卷 5913-5915页

作者： Hiroki Ikeuchi kazutoshi Hori Takashi Nishigami Hiroki Nakano Motoi Uchino Mitsuhiro Nakamura Nobuaki kaibe Masafumi Noda Hidenori Yanagi Takehira Yamamura Second Department of Surgery Hyogo College of Medicine Hyogo Japan Department of Gastroenterology Hyogo College of Medicine. Hyogo Japan Second Department of Pathology Hyogo College of Medicine. Hyogo Japan

We experienced a very rare case of ulcerative colitis (UC) accompanied with analogous lesions in the stomach, duodenum, and ileal J -pouch. Ileal J-pouch anal anastomosis was performed on a 29-year old woman in 1996. Six years later, she was admitted again to our hospital because of epigastralgia, nausea, watery diarrhea and low fever. Based on the results of endoscopic examination, we diagnosed it as pouchitis. Moreover, on hypotonic duodenography, expansion of the duodenal bulb and the descending portion were poor. kerckring folds disappeared with typical lead-pipe appearance. The pathogenesis of the gastric and duodenal lesion in this patient was similar to that of the colonic lesions of UC. For the gastroduodenal lesions in this patient, symptomatic remission was obtained following administration of crushed mesalazine tablets (1500 mg/d) for 14 d with continuous administration of omeprazole. Firstly we used ciprofloxacin to treat pouchitis. On the fifth day, she got a fever because of catheter infection. In the catheter culture, methicillin-resistant Staphylococcus aureus (MRSA) was detected. Therefore we changed ciprofloxacin to vancomycin hydrochloride (Vancomycin?). Vancomycin was very effective, and the stool frequency dramatically improved in three days. Now she continues to take mesalazine, but her condition is stable and there has been no recurrence of pouchitis.

关键词：胃十二直肠溃疡大肠炎病理机制治疗

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