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Improvement in corrosion resistance of magnesium coating with cerium treatment

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rare metals 2009年第3期28卷 277-283页

作者： Samia Ben Hassen Latifa Bousselmi Patrice berot El mustafa rezrazi Ezzeddine Triki Unité de recherche corrosion & Protection des métalliques ENITBP 37Tunis-BelvédèreTunisia Institut UTINAm CNRS UMR 6213Université de Franche-Comté16 route de Gray 25030 Besanon CedexFrance Laboratoire Traitement et recyclage des Eaux CERTEBorj CedriaTunisia

corrosion protection afforded by a magnesium coating treated in cerium salt solution on steel substrate was investigated using open circuit potential, polarization curves, and electrochemical impedance spectroscopy （EIS） in 0.005 m sodium chloride solution （Nacl）. The morphology of the surface was characterized by scanning electron microscopy （SEm）, energy dispersive spectroscopy （EDS）, and X-ray diffraction （XrD）. The cerium treated coating was obtained by immersion in cecl3 solution. The results showed that the corrosion resistance of the treated magnesium coating was improved. The corrosion potential of the treated coating was found to be nobler than that of the untreated magnesium coating and the corrosion current decreased significantly. Impedance results showed that the cerium treatment increased corrosion protection. The improvement of anti-corrosion properties was attributed to the formation of cerium oxides and hydroxides that gave rise to a physical barrier effect.

关键词： magnesium coating cerium corrosion protection impedance spectroscopy

XPS characterization and corrosion resistance of cerium-treated magnesium coatings

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rare metals 2011年第4期30卷 368-373页

作者： Samia Ben Hassen Latifa Bousselmi Patrice berot El mustafa rezrazi Ezzeddine Triki Unité de recherche corrosion & Protection des métalliques ENITBP 37Tunis-BelvédèreTunisie Institut UTINAm CNRS UMR 6213Université de Franche-Comté16 route de Gray 25030 Besanon CedexFrance Laboratoire Traitement et recyclage des Eaux CERTEBorj CedriaTunisie

cerium conversion treatment was applied on magnesium coatings in a solution containing cec13. The composition ot the cenum conversion layer on magnesium was investigated using X-ray photoelectron spectroscopy （XPS）, It was revealed that the composition predominately consisted of a three-valent state cerium compound with a relative abundance around 90%. Some of ce^3＋ was oxidized to ce^4＋. Electrochemical impedance spectroscopy results revealed that the total impedance of cerium-treated samples increased for a short immersion time in Nac1 solution before coating deteriorating. This deterioration was due to the coating porosity increasing and the breakdown of the conversion layer

关键词： cerium compounds magnesium coatings X-ray photoelectron spectroscopy corrosion resistance

correlation of IL-8 with induction, progression and metastatic potential of colorectal cancer

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World Journal of Gastroenterology 2007年第37期13卷 4996-5002页

作者： claudia rubie Vilma Oliveira Frick Sandra Pfeil mathias Wagner Otto Kollmar.ber.t Kopp Stefan Gr.ber.Bettina m rau martin K Schilling Department of General Visceral Vascular and Paediatric Surgery University of the Saarland Homburg 66421 Germany Institute of Pathology University of the Saarland Homburg 66421 Germany Institute of medical Biometrics Epidemiology and Medical Informatics University of the Saarland Homburg 66421 Germany

AIm： To investigate the expression profile of IL-8 in inflammatory and malignant colorectal diseases to evaluate its potential role in the regulation of colorectal cancer （crc） and the development of colorectal liver metastases （crLm）.mETHODS： IL-8 expression was assessed by quantitative real-time Pcr （Q-rT-Pcr） and the enzyme-linked immunosorbent assay （ELISA） in resected specimens from patients with ulcerative colitis （Uc, n = 6） colorectal adenomas （crA, n = 8）, different stages of colorectal cancer （n = 48） as well as synchronous and metachronous crLm along with their corresponding primary colorectal tumors （n = 16）.rESULTS： IL-8 mrNA and protein expression was significantly up-regulated in all pathological colorectal entities investigated compared with the corresponding neighboring tissues. However, in the crc specimens IL-8 revealed a significantly more pronounced overexpression in relation to the crA and Uc tissues with an average 30-fold IL-8 protein up-regulation in the crc specimens in comparison to the crA tissues. moreover, [L-8 expression revealed a close correlation with tumor grading. most interestingly, IL-8 up-regulation was most enhanced in synchronous and metachronous crLm, if compared with the corresponding primary crc tissues. Herein, an up to 80-fold IL-8 overexpression in individual metachronous metastases compared to normal tumor neighbor tissues was found.cONcLUSION： Our results strongly suggest an association between IL-8 expression, induction and progression of colorectal carcinoma and the development of colorectal liver metastases.

关键词： Interleukin-8 Gene expression profiling rNA and protein expressioni colorec cal cancer colorectalliver metastases

can small-scale altitudinal gradients predict spatial and temporal patterns in tropical forests?

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Journal of Forestry research 2021年第5期32卷 1854-1865页

作者： mariana caroline moreira morelli cléber rodrigo de Souza Jean Daniel morel Vinícius Andrade maia Alisson Borges miranda Santos Kaline Fernandes miranda rubens manoel dos Santos Forest Sciences Department Federal University of LavrasCampus UniversitárioCx.P.3037LavrasMGCEP 37200-000Brazil Department of Biology Federal University of LavrasCampus UniversitárioLavrasMGCEP 37200-000Brazil

In tropical montane forests,compositional and structural changes are commonly driven by broad-scale altitudinal ***,given the lack of knowledge on small-scale vegetation changes and temporal dynamics,we address the effects of small-scale variations in soil and altitude on tree community structure,temporal dynamics and phylogenetic diversity in a semi-deciduous tropical forest of the Atlantic Forest Domain,southeastern *** 2010 and 2015 we sampled thirty plots of 400 m^(2),set up along an altitudinal gradient between 1000 and 1500 m a.s.I..In each plot,we collected soil samples for chemical and textural *** fitted linear models to test the effects of altitude and soil on community dynamics and phylogenetic *** and soil explained the spatial variation in number of individuals and phylogenetic diversity *** lower to higher altitudes,we found decreasing fertility,increasing tree density and decreasing phylogenetic *** significantly influenced the increases in total biomass(from 240.9 to 255.4 t ha^(-1))and individual biomass(from 0.15 to 0.17 t)recorded in the *** while community temporal dynamics had rates of 1.96%for mortality,1.02%for recruitment,1.61%for biomass loss and 2.81%for biomass gain,none of them were explained by altitude or *** species substitution averaged0.1 in the ***,these results suggest that the small-scale variations in altitude and soil likely determine the conditions and resources that drive community assembly and structure,which are expressed by spatial variations along the altitudinal *** the same time,temporal patterns were not influenced by altitude-related environmental variation,resulting in a similar dynamic behaviour across the gradient,suggesting that broad-scale factors may play a more important role than local ones.

关键词： Fine-scale Semideciduous forests montane forests Dynamic patterns

Giant hepatic extra-gastrointestinal stromal tumor treated with cytoreductive surgery and adjuvant systemic therapy:A case report and review of literature

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World Journal of Gastrointestinal Surgery 2021年第3期13卷 315-322页

作者： michel ribeiro Fernandes caroline Lorenzoni Almeida Ghezzi Tomaz J m Grezzana-Filho Flávia Heinz Feier Ian Leipnitz Aljamir Duarte chedid carlos Thadeu Schmidt cerski marcio Fernandes chedid cléber rositoPinto Kruel Department of Gastrointestinal Surgery and Transplantation Hospital de Clínicas de Porto AlegrePorto Alegre 90035-007RSBrazil Division of radiology Hospital de Clínicas de Porto AlegrePorto Alegre 90035-903RSBrazil Department of Pathology Hospital de Clínicas de Porto AlegrePorto Alegre 90035-007RSBrazil

BAcKGrOUND Primary extra-gastrointestinal stromal tumors(E-GIST)of the liver are *** clinical presentation may range from asymptomatic to bleeding or manifestations of mass *** surgery followed by adjuvant therapy with imatinib is the standard of ***,under specific circumstances,a cytoreductive approach may represent a therapeutic *** describe herein the case of an 84-year-old woman who presented with a tender,protruding epigastric *** computed tomography scan revealed a large,heterogeneous mass located across segments III,IV,V,and VIII of the *** initial approach was transarterial embolization of the tumor,which elicited no appreciable *** the large size and central location of the tumor and the advanced age of the patient,non-anatomic complete resection was *** to substantial intraoperative bleeding and hemodynamic instability,only a near-complete resection could be *** and immunohistochemical staining confirmed the diagnosis of primary E-GIST of the *** the risk/benefit ratio for therapeutic options,debulking surgery may represent a strategy to control pain and prolong *** SUmmArY Here,we present a case report of a patient diagnosed with E-GIST primary of the liver,which was indicated a cytoreductive surgery and adjuvant therapy with *** E-GIST primary of the liver is a rare conditional,the treatment is with systemic therapy and total resection ***,a cytoreductive surgery will be necessary when a complete resection is no possible.

关键词： Extra-gastrointestinal stromal tumor Primary gastrointestinal stromal tumor of the liver cytoreductive surgery Debulking surgery case report

联邦德国核电站地震设计原则——历史发展及评论

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核动力工程 1984年第6期 91-94页

作者： m.Hintergr.ber. ,r.Wittmann ,杨仁安

联邦德国核电站地震设计原则记载在联邦德国核安全标准KTA2201.1“核电站抗震设计,第一部份:基本原则”中,该标准是1971年和1972年制定。1975年颁发的。KTA2201.1法规以美国联邦法规10cFr100附录A“核电站选址的地震和地质准则”为依据... 详细信息

联邦德国核电站地震设计原则记载在联邦德国核安全标准KTA2201.1“核电站抗震设计,第一部份:基本原则”中,该标准是1971年和1972年制定。1975年颁发的。KTA2201.1法规以美国联邦法规10cFr100附录A“核电站选址的地震和地质准则”为依据。所以,美国和联邦德国核电站地震设计原则基本相同。这个设计原则至少在联邦德国会导致对地震危险性的过高估计。该原则所规定的设计方法是不切实际的,据此制定的方案和设计的设备都是不经济的,其主要原因之一是它要求进行双重地震设计,即要求同时对SSE和OBE进行设计。至少对于我们所知的大多数电站的厂址来说,频繁的小地震(OBE)所引起的疲劳是不成问题的,以上两种地震所产生的实际结果是一致的,所以,没有理由提出OBE设计要求。因此,现行法规的观点应予修正。基于这种认识,联邦德国专家组对于KTA2201.1已起草了一个新建议,它包括下列主要修改意见: ——删去有关“设计地震”的计算。 ——只对单一的最大地震“安全地震”进行设计。 ——规定了一个较小的地震。当这种地震发生时,要求对电站进行检查,且在必要时停止电站运行。 ——可采用厂址特定的地震输入数据代替标准反应谱进行分析。 ——在厂址烈度I≤6的情况下,不需要做任何抗震计算。

关键词：核电站厂址核电厂发电厂地震美国核管会联邦德国

Small-scale edaphic heterogeneity as a floristic-structural complexity driver in Seasonally Dry Tropical Forests tree communities

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Journal of Forestry research 2020年第6期31卷 2347-2357页

作者： cle´ber rodrigo de Souza Jean Daniel morel Alisson Borges miranda Santos Wilder Bento da Silva Vinı´cius Andrade maia Polyanne Aparecida coelho Vanessa Leite rezende rubens manoel dos Santos Forest Sciences Departament Federal University of LavrasCx.P.3037Lavras 37200-000Brazil Biology Department Federal University of LavrasCx.P.3037Lavras 37200-000Brazil

Our work aimed to test the hypothesis that soil microscale heterogeneity act as a community ecological driver,increasing diversity and promoting structural shifts on the Seasonally Dry Tropical Forest(SDTF)tree *** evaluated the relationship between microscale edaphic variations and floristic–structural patterns of tree communities in a SDTF fragment located in the southern end of the Brazilian caatinga *** and soil data were obtained through 27 sample units of 400 m2(20 m 920 m),within each one we measured and identified at species level all arboreal individuals with circumference at the Breast Height greater or equal to 10 cm,and also collected the soil *** the data we evaluated soil variation influence on the tree community structural and floristic patterns trough generalized linear *** explained the small-scale structural and floristic variations,contributing significantly to biomass,sprouting and to floristic relationships between sample *** was also observed a possible relation of the result with the caatinga domain biogeographic history,due the presence of Sedimentary caatinga species,which are not expected for the study *** plays an important role in driving small-scale complexity and diversity of SDTF,but we also suggest that caatinga biogeographic events have influence on the high heterogeneity patterns.

关键词： caatinga domain Edaphic variables Sprouting Sedimentary caatinga

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面神经痛和第2版头痛疾病国际分类

世界核心医学期刊文摘（神经病学分册） 2006年第9期2卷 50-51页

作者： Zebenholzer. Wber c. Vigl m. 樊慧婷 Univ. Klinik für Neurologie Wühringer Gürtel 18-20 A1090 Wien Austria Dr.

Background. -recurrent or chronic facial pain may be a diagnostic challenge. Applying the diagnostic criteria of the second edition of the International classification of Headache Disorders (IcHD-II) leaves a considerable number of patients unclassifiable. Objective. -The aim of this study was to establish and evaluate revised criteria of trigeminal neuralgia and persistent idiopathic facial pain. methods. -Based on the diagnostic value of 12 clinical features of trigeminal neuralgia and 15 features of persistent idiopathic facial in 97 patients referred for facial pain to a neurological tertiary care centre we established revised criteria for persistent idiopathic facial pain and additional criteria for probable trigeminal neuralgia and probable idiopathic facial pain. results. -Applying the newly proposed criteria reduced the number of patients with facial pain not classifiable by more than 50%. The new criteria improved the sensitivity, particularly in idiopathic facial pain and did not cause a relevant decrease in specificity compared to IcHD-II. conclusion. -This study suggests that amendments to the IcHD-II criteria improve the diagnostic classification of facial pain.

关键词：面神经痛国际分类头痛疾病三叉神经痛神经系统疾病临床特征反复发作性原发性

冠状动脉紫杉醇洗脱支架置入后局部血管功能异常

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世界核心医学期刊文摘（心脏病学分册） 2007年第11期3卷 47-48页

作者： Togni m. r.ber.L. cocchia r. O.m. Hess 韩瑞娟 Swiss cardiovascular center University Hospital CH-3010 Bern Switzerland

背景:已有研究表明,与裸金属支架相比,紫杉醇洗脱支架(PES)可降低再狭窄发生率和再次血运重建的需要。然而,紫杉醇对血管功能的远期作用仍不明确。本研究旨在评价PES置入后冠状动脉对运动的血管舒缩反应。

关键词：紫杉醇洗脱支架远端血管近端血管功能冠状动脉置入