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Comparing the Behavior of Reinforced Concrete Columns Embedded in Walls and Subjected to Fire

Journal of Civil Engineering and Architecture 2022年第7期16卷 354-361页

作者： bruno carvalho lima de alencar matos Fernando Luis da Silva Ferreira João Paulo Correia Rodrigues Rodrigo Barreto Caldas department of Civil Engineering University of CoimbraCoimbra 3030-788Portugal department of Civil Engineering Federal University of Minas GeraisBelo Horizonte-MG 31270-901Brazil

Fire is an exceptional action that may occur during the life of a ***,it must be considered when designing a building *** standards provide several types of design methods for that propose,used for single elements,parts of structure or the structure as a *** fire design of columns is important both for new project as for remodel buildings and also for verification of the residual resistance of columns that have suffered a fire *** this way,the aim of this work is to analyze numerically different ways of fire exposure to check the compressive strength of the columns when subjected to fire and the influence of the adjacent walls to a column in case of *** thermal advanced analysis of the sections columns was performed using the finite element software,Abaqus CAE,where the standard fire curve,ISO 834(International Organization for Standardization 834),was used,with 4 h of fire *** was possible,with the two methods used in this work,to compare them to verify which model is more conservative and which is closer to the advanced numerical model,for calculating temperatures in the column *** was checked that the walls act as thermal insulators,protecting part of the columns from the convection and radiation of the ***,the effects of raising the temperature over the compressive resistance of the reinforced concrete column,were reduced.

关键词： Column reinforced concrete thermomechanical analysis fire

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Bioactive extracts of red seaweeds Pterocladiella capillacea and Osmundaria obtusiloba(Floridophyceae:Rhodophyta) with antioxidant and bacterial agglutination potential

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Asian Pacific Journal of Tropical Medicine 2016年第4期9卷 363-370页

作者： Daniel Barroso de alencar Fátima Cristiane Teles de carvalho Rosa Helena Rebouas Daniel Rodrigues dos Santos Kelma Maria dos Santos Pires-Cavalcante Rebeca Larangeira de lima Bárbara Mendes Baracho Rayssa Mendes Bezerra Francisco Arnaldo Viana Regine Helena Silva dos Fernandes Vieira Alexandre Holanda Sampaio Oscarina Viana de Sousa Silvana Saker-Sampaio Laboratrio de Produtos Naturais Marinhos.departamento de Engenharia de Pesca Universidade Federal do Ceará.Campus do Pici.Ar.Mister Hull.s/nCaixa Postal 6043 Laboratrio de Microbiologia Ambiental e do Pescado.Instituto de Ciências do Mar.Universidade Federal do Ceará.Av.da Abolicao 3207 Laboratrio de Microbiologia Ambiental e do Pescado.Instituto de Ciências do Mar.Universidade Federal do Ceará Laboratrio de Produtos Naturais Marinhos.departamento de Engenharia de Pesca Universidade Federal do Ceará Laboratrio de Cromatografia Departamento de QuimicaUniversidade do Estado do Rio Grande do NorteCampus Universitário Central

Objective:To evaluate the antioxidant,antibacterial and bacterial cell agglutination activities of the hexane(Hex) and 70%ethanol(70%EtOH) extracts of two species of red seaweeds Pterocladiella capillacea(***) and Osmundaria ***:In vitro antioxidant activity was determined by DPPH radical scavenging assay,ferric-reducing antioxidant power assay,ferrous ion chelating assay,β-carotene bleaching assay and total phenolic content *** activity was tested using the method of disc diffusion on Mueller-Hinton *** ability of algal extracts to agglutinate bacterial cells was also ***:The 70%EtOH extract of the two algae showed the highest values of total phenolic content compared to the Hex *** results of DPPH for both extracts(Hex,70%EtOH) of Osmundaria obtusiloba(43.46%and 99.47%) were higher than those of ***(33.04%and 40.81%) at a concentration of 1 000 μg/*** for the ferrous ion chelating,there was an opposite behavior,extracts of *** had a higher *** extracts showed a low ferric-reducing antioxidant power,with optical density ranging from0.054 to *** activities of all extracts evaluated for β-carotene bleaching were above 40%.There was no antibacterial activity against bacterial strains ***,the extracts of both species were able to agglutinate bacterial Gram positive cells of Staphylococcus aureus and Gram negative cells of Escherichia coli,multidrug-resistant Salmonella and Vibrio *** This is the first report of the interaction between these algal extracts,rich in natural compounds with antioxidant potential,and Gram positive and Gram negative bacterial cells.

关键词： Bioactive compounds Antioxidant Bacterial agglutination Rhodophyta

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Residual Feed Intake as a Measure to Select Genetically Productive Beef Cattle: A Review

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Journal of Agricultural Science and Technology(B) 2020年第2期10卷 118-123页

作者： Tiago Neves Pereira Valente Andréia Santos Cezário Wallacy Barbacena Rosa dos Santos Jeferson Corrêa Ribeiro Eliandra Maria Bianchini Oliveira Erico da Silva lima bruno Borges deminicis Thasia Martins Macedo Rogério de carvalho Veloso department of Animal Science Instituto Federal Goiano(IFGoiano)Campus PossePosse City73900-000Goiás StateBrasil department of Animal Science Instituto Federal Goiano(IFGoiano)Campus MorrinhosMorrinhos City75650-000Goiás StateBrasil department of Animal Science Faculdades Metropolitanas Unidas(FMU)São Paulo City05607-000São Paulo StateBrazil department of Animal Science Federal University of Southern Bahia(UFSB-BA)Teixeira de Freitas City45613-204Bahia StateBrazil

Measures such as residual feed intake(RFI)have been increasingly considered to select cattle with superior feed efficiency,as it is a characteristic of feed efficiency calculated as the difference between observed intake and estimated intake considering metabolic weight and the weight *** feed intake is obtained through the multiple regression equation of observed consumption on metabolic mean live weight and weight *** standard was shared among animals into one herd selected for low RFI(high efficiency)and compared to the one selected for high RFI(low efficiency).There was no correlated response in weight per year and in weight gain,and the effectiveness of low RFI selection in reducing feed costs was proven without affecting ***,selection of animals with negative RFI is not done by selecting animals directly according to the size of the viscera,rather it is done indirectly,that is,when selecting the most efficient animals and normally these animals already have the smallest viscera *** RFI is a trait that presents genetic variability,selectable to improve and has moderate heritability,between 0.30 and *** RFI is important because it reduces the direct economic impacts of reduced feed intake,as well as the effects of environmental impact on reducing methane emissions from enteric fermentation of ruminants.

关键词： Feed conversion feed efficiency enteric fermentation

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