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Journal of Iron and Steel Research(International) 2013年第12期20卷 124-132页

作者： Zappa sebastián Surian Estela Svoboda Hernán Research Secretariat Faculty of EngineeringNational University of Lomas de Zamora DEYTEMA-Development and Technology of Materials Centre Regional Faculty San NicolásNational Technological University Materials and Structures Laboratory INTECINFaculty of EngineeringNational University of Buenos Aires CONICET-National Scientific and Technical Research Council

The effects of shielding gas and post weld heat treatment on the pitting resistance, stress corrosion crack- ing and hydrogen embrittlement of supermartensitic stainless steel deposits were studied. Two all-weld-metal test coupons were prepared using a metal-cored wire under Ar＋ 5% He and Ar＋18%CO2 gas shielding mixtures. Solubi- lizing and solubilizing plus double tempering heat treatments were done with the objective of achieving different mi crostructural results, The samples welded under Ar＋5% He showed higher pitting corrosion resistance, for all post weld heat treatments, than those welded under Ar＋18% CO2. The different post weld heat treatments generated higher susceptibility to this corrosion mechanism. None of the samples presented signs of stress corrosion cracking, but in those subjected to the heat treatment, grain boundary selective attack was observed, on the surfaces of all the samples studied. The samples with highest hardness were more susceptible to hydrogen damage, thereby leading to reduced tensile strength on this condition.

关键词： supermartensitic stainless steel shielding gas post weld heat treatment corrosion hydrogen embrittle ment

Contemporaneous assembly of Western Gondwana and final Rodinia break-up:Implications for the supercontinent cycle

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Geoscience Frontiers 2017年第6期8卷 1431-1445页

作者： sebastián Oriolo Pedro Oyhantcabal Klaus Wemmer Siegfried Siegesmund Geoscience Center Georg-August-Universitat GottingenGoldschmidtstrae 337077 GottingenGermany Departamento de Geología Facultad de CienciasUniversidad de la RepúblicaMontevideoUruguay

Geological,geochronological and isotopic data are integrated in order to present a revised model for the Neoproterozoic evolution of Western *** the classical geodynamic scenario assumed for the period 800-700 Ma is related to Rodinia break-up and the consequent opening of major oceanic basins,a significantly different tectonic evolution can be inferred for most Western Gondwana *** cratons occupied a marginal position in the southern hemisphere with respect to Rodinia and recorded subduction with back-arc extension,island arc development and limited formation of oceanic crust in internal *** period was thus characterized by increased crustal growth in Western Gondwana,resulting from addition of juvenile continental crust along convergent *** contrast,crustal reworking and metacratonization were dominant during the subsequent assembly of *** Rio de la Plata,Congo-Sao Francisco,West African and Amazonian cratons collided at ca.630-600 Ma along the West Gondwana *** events overlap in time with the onset of the opening of the Iapetus Ocean at ca.610-600 Ma,which gave rise to the separation of Baltica,Laurentia and Amazonia and resulted from the final Rodinia *** East African/Antarctic Orogen recorded the subsequent amalgamation of Western and Eastern Gondwana after ca.580 Ma,contemporaneously with the beginning of subduction in the Terra Australis Orogen along the southern Gondwana ***,the Kalahari Craton was lately incorporated during the Late Ediacaran-Early *** proposed Gondwana evolution rules out the existence of Pannotia,as the final Gondwana amalgamation postdates latest connections between Laurentia and ***,a combination of introversion and extroversion is proposed for the assembly of *** contemporaneous record of final Rodinia break-up and Gondwana assembly has major implications for the supercontinent cycle,as supercontinent amalgamation and break-

关键词： BrasilianoePan-African Orogeny Neoproterozoic Collisional tectonics Pannotia Metacratonization Introversion-extroversion

The importance of grain and cut-off size in shaping tree beta diversity along an elevational gradient in the northwest of Colombia

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Forest Ecosystems 2020年第1期7卷 14-25页

作者： Johanna Andrea Martínez-Villa sebastián González-Caro álvaro Duque Departamento de Ciencias Forestales Universidad Nacional de Colombia sede MedellínCra.65#59a-110MedellínColombia Département des Sciences Biologiques Universitédu QuébecàMontréal141Avenue du Président-KennedyMontrealCanada

Background:Species turnover(β-diversity)along elevational gradients is one of the most important concepts in plant ***,there is a lack of consensus about the main driving mechanisms of treeβ-diversity at local scales in very diverse ecosystems(e.g.,Andean mountains),as well as how the sampling effect can alterβ-diversity ***,it has been hypothesized that patterns of change inβ-diversity at local scales along elevational gradients are driven by sampling effects stemming from differences in the size of the species pool rather than by underlying community assembly ***,we aim to evaluate the relative extent to which sampling effects,such as species pool size,grain size,and tree size cut-off,determine species sorting,and thus,the variability ofβ-diversity at local scales along elevational gradients in the northwest of ***:Using 151-ha permanent plots spread out along a 3000m elevational gradient,we used standardizedβ-deviation to assess the extent to which either sampling effects or the community assembly mechanisms determine the changes in species composition at local ***β-deviation was measured as the difference between the observed and nullβ-diversity divided by the standard deviation of the nullβ-*** found that the magnitude of change in localβ-deviation along the elevational gradient was significant and dependent on the employed spatial grain size and tree size ***,β-deviation increased with elevation in all sampling designs,which suggests that underlying community assembly mechanisms play a key role in shaping localβ-diversity along the elevational ***:Our findings suggest that grain size enlargement and the inclusion of trees with small diameters will improve our ability to quantify the extent to which the community assembly mechanisms shape patterns ofβ-diversity along elevational ***,we emphasize the scale-dependent nature of the assessment o

关键词： Andean forests Null models Species pool Species sorting Sampling effect

Storage time and condensed tannin content of high-moisture sorghum grains:Effects on in vitro fermentation and mold populations

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Animal Nutrition 2020年第1期6卷 92-97页

作者： Carmen García y Santos Lina Bettucci sebastián Brambillasca Cecilia Cajarville Laboratorio de Toxicología Facultad de VeterinariaUniversidad de la RepúblicaLasplaces 1550PC 11.600MontevideoUruguay Laboratorio de Micología Facultad de Ciencias-Facultad de IngenieríaUniversidad de la RepúblicaJulio Herrera y Reissig 565PC 11.300MontevideoUruguay Instituto de Producción Animal Facultad de VeterinariaUniversidad de la RepúblicaRuta 1km 42.200PC 80.100San JoseUruguay

Silage of high moisture sorghum grains is a highly relevant source of energy in cattle production systems in South *** is little information related to the chemical characteristics,the kinetics of fermentation and the toxic fungal populations of these *** aim of this study was to evaluate the effect of storage time and condensed tannins content of the grain on chemical composition,in vitro fermentation parameters,and toxicogenic fungal populations of moist sorghum grain stored in *** of 2 varieties of sorghum grains(high-tannin[HT]and low-tannin[LT]),were obtained during the grain harvest before silage making and after 30,90,and 180 d of storage(n=16).High-tannin grains had higher acid detergent fiber,tannins,gas production(P<0.05)and lower starch and rate of gas production(P<0.01).Interaction variety x storage time were observed for all chemical parameters(P<0.01),except for neutral detergent fiber assayed with a heat stable amylase and expressed inclusive of residual ash(aNDF)and *** and protein content increased in both varieties,tannins decreased in HT and LT,and organic matter(OM)increased in HT and declined in LT(P<0.05).The rate of gas production increased with the storage time for HT and LT(P<0.01).A linear reduction in the Aspergillus number of colonies in the HT varieties was observed(P<0.01),whereas a linear increase in Penicillium isolation was detected in the LT sorghums(P<0.01).The storage time was beneficial in terms of decreasing the condensed tannins,increasing fractional rate of gas production and minimizing fungal contamination,particularly on HT grains.

关键词： Sorghum grains silages Condensed tannins Toxicogenic fungal populations Storage time

Multipotent mesenchymal stromal cells:A promisingstrategy to manage alcoholic liver disease

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World Journal of Gastroenterology 2016年第1期22卷 24-36页

作者： Fernando Ezquer Flavia Bruna sebastián Calligaris Paulette Conget Marcelo Ezquer Centro de Medicina Regenerativa Facultad de MedicinaClínica Alemana-Universidad del DesarrolloSantiago 7710162Chile

Chronic alcohol consumption is a major cause of liver *** term alcoholic liver disease(ALD)refers to a spectrum of mild to severe disorders including steatosis,steatohepatitis,cirrhosis,and hepatocellular *** limited therapeutic options,stem cell therapy offers significant potential for these *** this article,we review the pathophysiologic features of ALD and the therapeutic mechanisms of multipotent mesenchymal stromal cells,also referred to as mesenchymal stem cells(MSCs),based on their potential to differentiate into hepatocytes,their immunomodulatory properties,their potential to promote residual hepatocyte regeneration,and their capacity to inhibit hepatic stellate *** perfect match between ALD pathogenesis and MSC therapeutic mechanisms,together with encouraging,available preclinical data,allow us to support the notion that MSC transplantation is a promising therapeutic strategy to manage ALD onset and progression.

关键词： Alcoholic liver disease Cellular therapy Alcoholic steatohepatitis Hepatic function recovery Mesenchymal stem cells

Circular RNAs in colorectal cancer:Possible roles in regulation of cancer cells

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World Journal of Gastrointestinal Oncology 2017年第2期9卷 62-69页

作者： María Isabel Taborda sebastián Ramírez Giuliano Bernal Laboratory of Molecular and Cell Biology of Cancer(Cancer Lab) Department of Biomedical SciencesFaculty of MedicineUniversidad Católica del NorteCoquimbo 1781421Chile

Colorectal cancer(CRC) is the third most commonly diagnosed cancer in the world and the fourth principal cause of cancer deaths worldwide. Currently, there is a lack of low cost and noninvasive screening tests for CRC, becoming a serious health problem. In this context, a potential biomarker for the early detection of CRC has recently gained attention. Circular RNAs(circ RNA), a re-discovered, abundant RNA specie, is a type of noncoding covalent closed RNAs formed from both exonic and intronic sequences. These circular molecules are widely expressed in cells, exceeding the abundance of the traditional linear m RNA transcript. They can regulate gene expression, acting as real sponges for mi RNAs and also regulate alternative splicing or act as transcriptional factors and inclusive encoding for proteins. However, little is known about circ RNA and its relationship with CRC. In this review, we focus on the biogenesis, function and role of these circ RNAs in relation to CRC, including their potential as a new biomarker.

关键词：圆形的 RNA Colorectal 癌症基因规定 CircRNA 非编码的 RNA 长非编码的 RNA Circularization

Epi- and endobiont faunal communities on an Egyptian Mediterranean rocky shore: species composition and their competition for space

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Journal of Oceanology and Limnology 2021年第1期39卷 198-207页

作者： Magdy EL HEDENY Mohamed RASHWAN sebastián RICHIANO Saleh AL FARRAJ Ghada AL BASHER Department of Geology Faculty of ScienceAlexandria UniversityAlexandria 21568Egypt Department of Biological and Geological Sciences Faculty of EducationAlexandria UniversityAlexandria 14037Egypt Instituto Patagónico de Geología y Paleontología(CONICET-CENPAT) Puerto Madryn 9120Argentina Department of Zoology College of SciencesKing Saud UniversityP.O.Box 2455Riyadh 11451Saudi Arabia

The exposed calcareous rocky area of the Abu Qir Headland,east of Alexandria,Egypt which range from coarse grains,through pebbles,cobbles,and boulders to rocky platforms,was signifi cantly colonized by sclerobionts(epibionts and endobionts).The epibiont species diversity was comparatively higher than that of *** communities included bryozoans(the anascan-grade cheilostome Bifl ustra savartii),serpulid(Hydroides elegans,Spirobranchus ***,Vermiliopsis striaticeps and Protula or Apomatus)and spirorbid(Spirorbis)wormtubes,and balanoid barnacles(Amphibalanus amphitrite,Balanus trigonus,and Perforatus perforatus).The cheilostome bryozoan colonies,which developed extensive sheets,proliferated on the study rocky shore either encrusting the bioeroded basement directly,or encrusting other epilithic taxa,particularly balanoid barnacles and serpulid *** displayed a remarkable marginal competitive interaction(overgrowth and stand-off)for space on the study rocky *** the other hand,endobionts were not well represented on the studied rocky shore *** was possible to identify three ichnotaxa:Gastrochaenolites,Maeandropolydora,and *** fi ndings documented represent a signifi cant contribution to our knowledge of sclerobionts composition,sequence of their colonization and/or bioerosion,and their mutual relationships on the intertidal rocky shore of the Abu Qir Headland.

关键词： sclerobionts encrustation bioerosion Mediterranean Egypt

The Asian Lineage of Zika Virus: Transmission and Evolution in Asia and the Americas

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Virologica Sinica 2019年第1期34卷 1-8页

作者： Tao Hu Juan Li Michael J.Carr sebastián Duchêne Weifeng Shi Key Laboratory of Etiology and Epidemiology of Emerging Infectious Diseases in Universities of Shandong Taishan Medical College Global Station for Zoonosis Control Global Institution for Collaborative Research and Education (GI-CoRE)Hokkaido University National Virus Reference Laboratory School of MedicineUniversity College Dublin Department of Biochemistry and Molecular Biology Bio21 Molecular Science and Biotechnology InstituteUniversity of Melbourne

Since first isolation in 1947 from the Zika forest in Uganda, Zika virus(ZIKV) has been principally known as a benign agent associated with sporadic human infections in a restricted number of African countries. However, during 2015–2016,an Asian lineage of ZIKV caused an unprecedentedly large outbreak in the Americas and sizeable numbers of exported cases across the globe. In this review, we critically appraise the recent advances in molecular epidemiological studies of ZIKV performed to date, and we highlight the pivotal role played by genomic surveillance in elucidating the origins,dissemination and evolution of the Asian lineage of ZIKV in Asia and in the Americas.

关键词： Zika virus(ZIKV) Asian lineage Transmission Evolution Re

高放废物工程屏障的热–水–力耦合作用分析(英文)

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岩石力学与工程学报 2006年第4期25卷 670-680页

作者： Gens A. Antonio Olivella sebastià 加泰罗尼亚理工大学地质工程系

采用多相多类方法,提出热–水–力耦合作用分析的综合模型。分析考虑多孔介质的三相(固、液、气)和三类(矿物、水分、空气)模型,该模型是根据控制方程、本构关系和平衡条件来建立的;并提出用于模拟高放废物地下处置体系附近场地性状的... 详细信息

采用多相多类方法,提出热–水–力耦合作用分析的综合模型。分析考虑多孔介质的三相(固、液、气)和三类(矿物、水分、空气)模型,该模型是根据控制方程、本构关系和平衡条件来建立的;并提出用于模拟高放废物地下处置体系附近场地性状的热–水–力耦合分析通用程序。热–水–力耦合分析可将工程屏障中不同过程间发生的主要相互作用,以及附近岩石的散热和水化现象都考虑进去。通过试验结果的验证,得出一些关于热–水–力方面的重要结论。

关键词：高放废物热-水-力分析耦合分析工程屏障

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山脚下的慢时光萨拉戈萨EA住宅

室内设计与装修 2023年第8期 70-75页

作者： [西班牙]Sergio sebastián Franco 沙漏(编译) 不详

西班牙小镇利塔卡郊区的这栋住宅展现了建筑与周围环境的完美融合。它沿着一片纵向的地块延伸,向西望去,能够眺望壮丽的蒙卡约山。这条山脉不仅定义了该地区的美丽景观,还塑造了这片区域自然公园的特色。住宅在山脉和小镇之间建立了一... 详细信息

西班牙小镇利塔卡郊区的这栋住宅展现了建筑与周围环境的完美融合。它沿着一片纵向的地块延伸,向西望去,能够眺望壮丽的蒙卡约山。这条山脉不仅定义了该地区的美丽景观,还塑造了这片区域自然公园的特色。住宅在山脉和小镇之间建立了一种特殊的视觉关系,仿佛在进行一场富有诗意的对话。

关键词：周围环境萨拉戈萨住宅诗意的对话完美融合西班牙山脉