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Grain boundary engineering for intergranular corrosion resistant austenitic stainless steel

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材料与冶金学报 2005年第2期4卷 109-109页

作者：粉川博之 shimada Masayuki MICHIUCHI Masato SAkAI kenta SATO Yutaka S 日本东北大学 Department of Materials Processing Graduate School of EngineeringTohoku University 6-6-02 Aramaki-aza-Aob Sendai 980-8579 Japan Department of Materials Processing

Sensitization by chromium depletion due to chromium carbide precipitation at grain boundaries in austenitic stainless steels can not be prevented perfectly only by previous conventional techniques, such as reduction of carbon content, stabilization-treatment, local solution-heat-treatment, etc. Recent studies on grain boundary structure have revealed that the sensitization depends strongly on grain boundary character and atomic structure, and that low energy grain boundaries such as coincidence-site-lattice (CSL) boundaries have strong resistance to intergranular corrosion. The concept of ’grain boundary design and control’ has been developed as grain boundary engineering (GBE). GBEed materials are characterized by high frequencies of CSL boundaries which are resistant to intergranular deterioration of materials, such as intergranular corrosion. A thermomechanical treatment was tried to improve the resistance to the sensitization by GBE. A type 304 austenitic stainless steel was cold-rolled and solution-heat-treated, and then sensitization-heat-treated. The grain boundary character distribution was examined by orientation imaging microscopy (OIM). The intergranular corrosion resistance was evaluated by electrochemical potentiokinetic reactivation (EPR) and ferric sulfate-sulfuric acid tests. The sensitivity to intergranular corrosion was reduced by the thermomechanical treatment and indicated a minimum at a small roll-reduction. The frequency of CSL boundaries indicated a maximum at the small reduction. The ferric sulfate-sulfuric acid test showed much smaller corrosion rate in the thermomechanical-treated specimen than in the base material. A high density of annealing twins were observed in the thermomechanical-treated specimen. The results suggest that the therrmomechanical treatment can introduce low energy segments in the grain boundary network by annealing twins and can arrest the percolation of intergranular corrosion from the surface. The effects of carbon co

关键词：奥氏体不锈钢抗晶间腐蚀晶界工程 EPR

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Tibolone Reverses NAFLD in Ovariectomised Rats by Reducing Adiposity and Insulin Resistance

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Journal of Pharmacy and Pharmacology 2019年第4期7卷 148-164页

作者： Lilian Brites Campos-shimada Eduardo Hideo Gilglioni Danielle Aparecida Munhos Hermoso Ana Julia dos Reis Buzzo Rosangela Fernandes Garcia Elismari Rizato Martins-Maciel Emy Luiza Ishii-Iwamoto Clairce Luzia Salgueiro-Pagadigorria Laboratory of Experimental Steatosis Department of BiochemistryState University of MaringáMaringá87020900Brazil Department of Physiological Sciences State University of MaringáMaringá87020900Brazil Department of Biomedicine Centro Universitario IntegradoCampo Mourao 87300970Brazil

This study aimed to investigate the effects of tibolone,a synthetic steroid,on several metabolic dysfunctions induced by oestrogen deficiency,in ***(OVX)rats were used as animal model of postmenopausal metabolic *** OVX rats were treated with daily doses of tibolone(0.16 mg/kg)and the results were compared with control(sham-operated)and OVX untreated *** reduced the adiposity and the visceral adipocyte size in OVX *** insulin sensitivity was also improved,and a decrease in the activity of the adipose tissue hormone-sensitive lipase enzyme was *** lower lipolysis by visceral adipocytes,associated with the recovery of peroxisomalβ-oxidation by tibolone may have contributed to the reversion of NAFLD in treated OVX *** reduction of liver lipid contents resulted in a general improvement in the liver redox *** addition,tibolone reduced the mitochondrial ROS generation and restored the activity of glucose-6-phosphate *** also exerted antioxidant effects on inguinal adipose *** exerted several beneficial effects on cellular and metabolic dysfunctions induced by ovariectomy in *** important mode of action of tibolone was the reduction of the visceral adipocyte size,corroborating the relationship between this one and the development and progression of several comorbidities associated with metabolic syndrome.

关键词： Tibolone ovariectomy hepatic steatosis obesity oxidativestress

Prophylactic lateral pelvic lymph node dissection in stage Ⅳ low rectal cancer

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World Journal of Clinical Oncology 2017年第5期8卷 412-419页

作者： Hiroshi Tamura Yoshifumi shimada Hitoshi kameyama Ryoma Yagi Yosuke Tajima Takuma Okamura Mae Nakano Masato Nakano Masayuki Nagahashi Jun Sakata Takashi kobayashi Shin-ichi kosugi Hitoshi Nogami Satoshi Maruyama Yasumasa Takii Toshifumi Wakai Division of Digestive and General Surgery Niigata University Graduate School of Medical and Dental Sciences Department of Digestive and General Surgery Uonuma Institute of Community MedicineNiigata University Medical and Dental Hospital Department of Surgery Niigata Cancer Center Hospital

AIM To assess the clinical significance of prophylactic lateral pelvic lymph node dissection (LPLND) in stage Ⅳ low rectal *** We selected 71 consecutive stage Ⅳ low rectal cancer patients who underwent primary tumor resection,and enrolled 50 of these 71 patients without clinical LPLN *** patients had distant metastasis such as liver,lung,peritoneum,and paraaortic *** LPLN metastasis was defined as LN with a maximum diameter of 10 mm or more on preoperative pelvic computed tomography *** patients underwent primary tumor resection,27 patients underwent total mesorectal excision(TME) with LPLND(LPLND group),and 23 patients underwent only TME(TME group).Bilateral LPLND was performed simultaneously with primary tumor resection in LPLND group.R0 resection of both primary and metastatic sites was achieved in 20 of 50 *** evaluated possible prognostic factors for 5-year overall survival (OS),and compared 5-year cumulative local recurrence between the LPLND and TME *** For OS,univariate analyses revealed no significant benefit in the LPLND compared with the TME group (28.7% vs 17.0%,P = 0.523); multivariate analysis revealed that R0 resection was an independent prognostic *** cumulative local recurrence,the LPLND group showed no significant benefit compared with TME group (21.4% vs 14.8%,P = 0.833).CONCLUSION Prophylactic LPLND shows no oncological benefits in patients with Stage Ⅳ low rectal cancer without clinical LPLN metastasis.

关键词： Prophylactic lateral pelvic lymph node dissection StageⅣ Low rectal cancer

脾循环的影响:利用微泡对比剂无创性评估门静脉血流动力学

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国际医学放射学杂志 2015年第3期 293-293页

作者： T.shimada H.Maruyama T.kondo T.Sekimoto M.Takahashi O.Yokosuka 战锟 Department of Gastroenterology and Nephrology Chiba University Graduate School of Medicine1-8-1 Inohana Chuou-kuChiba 260-8670Japan

目的利用微泡对比剂监测脾循环,进而评估门静脉高压的严重程度。方法前瞻性研究91例病人[年龄30～86岁,平均(63.0±12.6)岁;男60例,女31例],其中肝硬化62

关键词：无创性微泡肝硬化组对比剂

经皮冠状动脉成形术中的冠状动脉破裂原因分析

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中国临床医学 2010年第4期17卷 480-483页

作者：邱朝晖 kataoka Toru 郭新贵 kobayashi Yoshiki Nishioka Hiroki 张煜 Sakamoto kazuo Yoshi mura Takayoshi Shi mada kenei Yoshikawa Junichi 复旦大学附属华东医院心内科上海200040 日本大阪市立大学附属医院循环器内科日本大阪5450051 日本大阪市泉尾医院内科日本大阪5500024 日本大阪市育和会纪念医院心内科日本大阪5440004 日本大阪掖济会医院心内科日本大阪5500022

目的：探讨冠状动脉成形术中冠状动脉破裂的可能原因。方法：对所有介入治疗前的靶病变行定性和定量造影分析,并选择在发生冠状动脉破裂前最近一次的血管内超声（IVUS）图像进行分析。结果：在5个心脏介入中心总共1 506例经皮冠状动脉... 详细信息

目的：探讨冠状动脉成形术中冠状动脉破裂的可能原因。方法：对所有介入治疗前的靶病变行定性和定量造影分析,并选择在发生冠状动脉破裂前最近一次的血管内超声（IVUS）图像进行分析。结果：在5个心脏介入中心总共1 506例经皮冠状动脉成形术（PCI）患者中,发生冠状动脉破裂15例（1.0%）,其中6例与操作导丝相关,1例与单纯球囊扩张相关,8例与支架植入相关。6例与导丝相关的破裂均由亲水涂层或中等硬度导丝所致,靶病变包括3例闭塞、4例偏心和3例分叉病变。与球囊或支架相关冠状动脉破裂包括6例偏心、6例中等至严重钙化病变。有血管内超声分析的5例,其病变偏心率均小于0.4,钙化弓在42~109度。除了单纯球囊破裂病例,在所有支架植入导致的破裂,球囊/管腔比值均超过1.3。所有与导丝相关冠状动脉破裂属于EllisⅡ级,与球囊或支架相关的2例属Ⅱ级,7例属Ⅲ级。结论：导丝相关的冠状动脉破裂常发生在采用亲水涂层或中等硬度导丝对偏心、分叉或闭塞病变进行操作;球囊或支架相关冠状动脉破裂经常与球囊尺寸过大或压力过大有关,常发生在偏心和伴钙化的病变处。

关键词：经皮冠状动脉成形术冠状动脉破裂冠状动脉造影定量分析血管内超声

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