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| Registros recuperados: 13 | |
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| Almeida,Elka Fabiana Aparecida; Paiva,Patrícia Duarte de Oliveira; Lima,Luiz Carlos de Oliveira; Silva,Franklin Cordeiro; Fonseca,Juliana; Nogueira,Denismar Alves. |
| Calla lily is an appreciated specie used for flower arrangements. In spite of its commercial importance, there is little information on calla lily postharvest conservation. Thus, this study aimed to determine the best sucrose concentration for pulsing and cold storage conditions to extend calla lily postharvest durability. Flower stalks were submitted to a pulsing pre-treatment using 2, 4, 8, 12 and 16% sucrose in the solution, for one hour, plus a treatment with direct storage in cold chamber (4ºC), without a prior-treatment. Dry storage or storage in solution with the commercial product Flower® was also tested. A completely randomized design was used with four replicates and three inflorescences per plot. Spathe length and width were daily measured from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zantedeschia aethiopica; Durability; Floriculture. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000400003 |
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| Bordes, Melanie; Davies, Peter; Cognard, J. -y.; Sohier, L.; Sauvant-moynot, V.; Galy, J.. |
| This study is concerned with the development of a tool to predict the long term behaviour of adhesively bonded steel joints aged in sea water. First, diffusion kinetics and the mechanisms governing the degradation of mechanical properties of an epoxy adhesive are described. These two sets of data were used in a Coupled finite element (FE) analysis to determine the stress state in double lap shear (DLS) specimens before and after aging. However, subsequent tests on DLS specimens indicated an adhesive and not cohesive failure mode, so this approach could not be used to predict failure in the present case without introducing an interfacial damage parameter. A second approach was therefore employed, in which modified Arcan samples were designed in order to... |
| Tipo: Text |
Palavras-chave: Coupling; Finite element stress analysis; Aging; Durability. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6968.pdf |
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| Le Gac, Pierre-yves; Choqueuse, Dominique; Melot, D.; Melve, B.; Meniconi, L.. |
| Polymers are widely used for passive thermal insulation coatings on steel pipe in offshore oil and gas production. In this industry, structures used in deep sea have to be reliable as they are in service for more than 20 years in a very severe environment: sea water, hydrostatic pressure, temperature. One of the main questions is how to test and predict the lifetime of such structures in the laboratory. This study presents one approach that has been developed to characterize and predict the degradation of polyurethanes used as thermal insulation materials. Based on results obtained during accelerated ageing of the PU in sea water, a prediction of degradation through the thickness has been set up taking into account the temperature profile in the coating,... |
| Tipo: Text |
Palavras-chave: Polyurethane; Life time prediction; Hydrolysis; Offshore; Thermal insulation; Durability. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00174/28572/26957.pdf |
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| Davies, Peter. |
| This paper describes the influence of seawater ageing on composites used in a range of marine structures, from boats to tidal turbines. Accounting for environmental degradation is an essential element in the multi-scale modelling of composite materials but it requires reliable test data input. The traditional approach to account for ageing effects, based on testing samples after immersion for different periods, is evolving towards coupled studies involving strong interactions between water diffusion and mechanical loading. These can provide a more realistic estimation of long-term behaviour but still require some form of acceleration if useful data, for 20 year lifetimes or more, are to be obtained in a reasonable time. In order to validate extrapolations... |
| Tipo: Text |
Palavras-chave: Seawater; Immersion; Durability; Damage; Coupling. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00340/45167/44603.pdf |
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| Robison, Lindon J.; Schmid, A. Allan; Siles, Marcelo E.. |
| Social capital in the past two decades has emerged as a dominant paradigm in the various social science disciplines. However, its adoption by the different social science disciplines has led to multiple and often conflicting definitions of social capital. Some differences in the definition of social capital can be explained because scientists have included in the definition expressions of its possible uses, where it resides, and how its service capacity can be changed. This paper defends the social capital metaphor by pointing out that social capital has many important capital-like properties including service potential, durability, flexibility, substitutability, opportunities for decay (maintenance), reliability, ability to create other capital forms,... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Social capital; Cultural capital; Human capital; Physical/financial capital; Service potential; Durability; Flexibility; Substitutability; Decay (maintenance); Reliability; Investment (disinvestment); Institutional and Behavioral Economics. |
| Ano: 1999 |
URL: http://purl.umn.edu/11649 |
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| Tolêdo Filho,Romildo Dias; Joseph,Kuruvilla; Ghavami,Khosrow; England,George Leslie. |
| ABSTRACT The inclusion of fibre reinforcement in concrete, mortar and cement paste can enhance many of the engineering properties of the basic materials, such as fracture toughness, flexural strength and resistance to fatigue, impact, thermal shock and spalling. In recent years, a great deal of interest has been created worldwide on the potential applications of natural fibre reinforced, cement based composites. Investigations have been carried out in many countries on various mechanical properties, physical performance and durability of cement based matrices reinforced with naturally occurring fibres including sisal, coconut, jute, bamboo and wood fibres. These fibres have always been considered promising as reinforcement of cement based matrices because... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Composite material; Natural fibres; Concrete; Mortar; Strength; Stiffness; Durability. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43661999000200245 |
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| Registros recuperados: 13 | |
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