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| Registros recuperados: 83 | |
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| Kim,Hee-Kwon; Jeong,Byung-Hoon. |
| Abstract The functional variant of the Klotho "KL-VS" stretch, which includes six polymorphisms in linkage disequilibrium, is reportedly associated with healthy aging and longevity in European and American populations. Among Asian populations, this variant has been observed in the Indian population but not in the Iranian population. An association between KL-VS polymorphism and aging has not been reported in Koreans. To investigate whether the KL-VS polymorphism could be associated with healthy aging and longevity in a Korean population, we analyzed genotype and allele frequencies of the KL-VS variant in a large Korean population sample. The KL-VS variant was not found in 874 Korean individuals. Thus, it is not possible to test its association to aging in... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Aging; KLOTHO gene; KL-VS polymorphism; Population genetics. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572016000300370 |
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| Humeau, Corentin; Davies, Peter; Le Gac, Pierre Yves; Jacquemin, Frédéric. |
| Polyamide fibres are known to be sensitive to water, and this has limited their marine applications. However, their low stiffness and high strength could be attractive for shallow water mooring line ropes, particularly for floating wind turbines. Such applications require the influence of water on mechanical behaviour to be fully understood, and this paper presents results describing how water affects static and creep response of polyamide 6 fibre yarns. First, the effect of water on fibre Tg is quantified, then tensile behaviour is examined. Finally, a model based on Schapery’s non-linear creep analysis is identified for different humidity conditions. The results show that while moisture has a small effect on short-term tensile behaviour, long term... |
| Tipo: Text |
Palavras-chave: Aging; Moisture; Fibre; Creep; Viscoelastic model. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00460/57190/59251.pdf |
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| Derombise, Guillaume; Van Schoors, Laetitia Vouyovitch; Messou, Marie-fleur; Davies, Peter. |
| Aramid fibers are high-performance materials which have been used in ropes and protective clothing for many years. They are also now being proposed in geo-textiles for ground reinforcement. The influence of the surface finish composition and content has been studied in the field of cables and textiles, but there is no published data concerning the effect of a finish treatment on the hydrolytic degradation. Aramid fibers with different finish contents have been aged in an alkaline environment. The degradation has been identified by FTIR, viscosimetry, TGA, SEM, and tensile tests. For Technora fibers, the presence of finish appears to limit the tensile strength loss of aramid fibers at pH 11 by limiting abrasion, as well as bulk and surface degradation. For... |
| Tipo: Text |
Palavras-chave: Aramids; Fibers; Aging; Finish; Hydrolysis. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00006/11702/8987.pdf |
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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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| Davies, Peter; Riou, Luc; Mazeas, Florence; Warnier, Philippe. |
| A study of thermoplastic matrix composites has been performed to investigate their use in underwater applications such as oceanography, submarine, and sub-sea offshore structures. This article first presents six candidate materials. Results from simple mechanical and seawater aging screening tests on flat specimens are then described. Glass/epoxy and carbon/epoxy composites are used as reference materials. Two materials emerged from this process, glass/PEI and carbon/PEEK. Cylinders of both were manufactured and subjected to hydrostatic pressure tests, and results are compared to those for glass/epoxy and carbon/epoxy cylinders of similar geometry. The carbon/PEEK material appeared most promising. It resisted pressures in excess of 90 MPa and was retained... |
| Tipo: Text |
Palavras-chave: Damage tolerance; Glass/PEI; Carbon/PEEK; Aging; Hydrostatic pressure; Cylinder. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-1037.pdf |
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| Davies, Peter; Verbouwe, W.. |
| Basalt fibres offer potential for use in marine structures, but few data exist to evaluate the influence of seawater immersion on their mechanical behaviour. This paper provides the results from a study in which basalt fibre reinforced epoxy composites were aged in natural seawater at different temperatures. Tests were performed under quasi-static and cyclic loading, first in the as-received state then after saturation in natural seawater. Results are compared to those for an E-glass reinforced composite with the same epoxy matrix. They indicate similar mechanical performance for both materials after seawater saturation. |
| Tipo: Text |
Palavras-chave: Seawater; Aging; Fatigue; Basalt fibre; Epoxy; Unidirectional; Flexure. |
| Ano: 2018 |
URL: http://archimer.ifremer.fr/doc/00392/50385/51111.pdf |
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| Suazo Galdames,Iván; Zavando,Daniela. |
| In this study we tested the hypothesis that diagnostic performance of the morphological indicators for sexual dimorphism are reduced as they are applied in skull and mandibles of older subjects. We used 275 adult human skulls, 250 of these with mandible, all subjects with sex and age registry. Sixteen classic morphological indicators of sexual dimorphism were evaluated, this information was compared with the registry and results noted in terms of precision. The best general performance of morphological indicators of sexual dimorphism were recorded in the 31 - 40 and 61 - 70 years, age range groups. Lowest precision ws recorded in the group corresponding to subjects between 21 30 years. Our results do not support the proposed hypothesis and suggest a... |
| Tipo: Journal article |
Palavras-chave: Sexual dimorphism; Sex determination; Aging; Age; Skull. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000100053 |
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| Tanasov,Valéria Simões; Neto,Walter Krause; Gonçalves,Leandro; Maifrino,Laura Beatriz Mesiano; de Sousa,Romeu Rodrigues; Gama,Eliane Florencio. |
| The aim of this research was to investigate the effect of testosterone propionate administration in the liver of rats. The rats were divided in the following groups: Initial control (SC), Aged control (SE) and Anabolic group (SA). Testosterone propionate was administered three times per week during 16 weeks. Using morphoquantitative techniques, we quantified the volume densities of lobular and non-lobular parenchyma, area and number of nuclei of hepatocytes. The data were analyzed statistically using mean and standard deviation, ANOVA one-way and level of significance about p0.05. Our results showed an increase in capillaries, perisinusoidal spaces and biliary ducts in SE group compared to SC. SA group showed a decrease in hepatic cells, non-lobular volume... |
| Tipo: Journal article |
Palavras-chave: Aging; Testosterone proprionate; Hepatic tissue; Animals. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000300002 |
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| Alves,Janice Chaim; Wafae,Gabriela Cavallini; Coelho,Daniela de Paula; Wafae,Nader; Coelho,Viviane de Assis; Pereira,Eduardo; Ruiz,Cristiane Regina. |
| The observation of the stage of ossification of the sagittal suture has been adopted as possible approach of age evaluation in anthropology and legal medicine, as area of cranial pathologies: craniosynostosis and scaphocephaly and as diagnosis resource in tomographies. Regarding it, we found many controversies in the specialized literature, thus we decided to accomplish this research with the following objectives: to examine the ossification of the external surface of the sagittal suture, observing eventual differences due to age, sex and ethnic group. Our material consists of 88 dry craniums of variable ages, both sexes belonging to the ethnic groups: white and black. In that material we observed that: with progression of age, the relation between age and... |
| Tipo: Journal article |
Palavras-chave: Sutures; Synostosis; Anthropology; Aging. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000200026 |
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| Age estimation of commercially exploited fish species in the Benguella region. Stocks of the two species of horse mackerel that occur in the Benguela region, namely Cape (Trachurus trachurus capensis) and Cunene horse mackerel (Trachurus trecae) are being exposed to increasing levels of commercial exploitation, highlighting the requirement for effective management measures to ensure their sustainable utilization. Such measures can only be implemented with confidence if they are based on reliable stock assessment procedures. Sizestructured stock assessment models have been found to be unsuitable for Southern African horse mackerel stocks, and the decision has recently been made to move to an age-structured VPA approach. A fundamental requirement for this... |
| Tipo: Report |
Palavras-chave: Aging; Aging; Http://aims.fao.org/aos/agrovoc/c_192. |
| Ano: 2001 |
URL: http://hdl.handle.net/1834/2758 |
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| Stallmann, Judith I.; Deller, Steven C.; Shields, Martin. |
| The literature on the economic and fiscal impacts of in-migrating retirees on rural communities concentrates on the young, newly-retired. An issue not systematically addressed are the impacts on the communities as these retirees age. The Wisconsin Economic Impact Modeling System, a county level conjoined input-output/econometrics simulation model, is used to assess the impact of an aging rural population. Using data from the US Bureau of Labor Statistics' Consumer Expenditure Survey, profiles of two household types are constructed and used to simulate the economic impact of an additional 500 elderly households into a small rural economy. Household types vary by age and, as a result, have different income levels and expenditure patterns. As... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Aging; Economic impacts; Development policy; Community/Rural/Urban Development. |
| Ano: 1998 |
URL: http://purl.umn.edu/23987 |
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| Schultz, T. Paul. |
| Life cycle savings is proposed as one explanation for much of the increase in savings and economic growth in Asia. The association between the age composition of a nations population and its savings rate, observed within 16 Asian countries from 1952 to 1992, is reestimated here to be less than a quarter the size reported in a seminal study, which assumed lagged savings is exogenous. Specification tests as well as common sense imply, moreover, that lagged savings is likely to be endogenous, and when estimated accordingly there remains no significant dependence of savings on the age composition, measured in several ways. Research should consider lifetime savings as a substitute for children, and model the causes for the decline in fertility which changes... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Life cycle savings; Aging; Asian growth; Demographic transition; Financial Economics; D91; J11; O11; O53. |
| Ano: 2004 |
URL: http://purl.umn.edu/28409 |
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| Augusto, Helder dos Anjos; Ribeiro, Eduardo Magalhaes. |
| This article analyzes the effect of the aging and the retirements in the Brazilian rural scene, which is a question of most importance for the current days, since the relative participation of the aging group in the total set of the Brazilian population is increasing. Thus, there exists a concern with the future of the Social Security sot that it must pass through reforms. Hence, the objective of this paper is to raise elements for the discussion on the importance of the social security in the agricultural sector, since it passes through significant demographic changes. With a sufficiently fragmented history, since the years of the Empire, the Social Security has been extending several segments of society, being one of the most important forms of inclusion... |
| Tipo: Journal Article |
Palavras-chave: Aging; Social Security; Rural retirements; Brazil.; Community/Rural/Urban Development; Labor and Human Capital. |
| Ano: 2005 |
URL: http://purl.umn.edu/43982 |
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| Oliveira,Bruno Luciano Carneiro Alves de; Silva,Alécia Maria da; Silva,Raimundo Antonio da; Thomaz,Erika Barbara Abreu Fonseca. |
| Aging with quality of life does not occur equally among the racial groups of Brazilian elderly, and few studies have analyzed this issue in the states of the Brazilian Legal Amazon. The objective of this study was to investigate racial inequalities in the socioeconomic, demographic and health conditions of elderly residents of Maranhão state, Brazil. The present work is a cross-sectional study of 450 elders aged 60 years or older included in the 2008 National Household Sample Survey. The prevalence of socioeconomic, demographic, health and habit indicators and of risk factors were estimated in white, brown and black racial categories that were self-reported by the survey participants. The chi-square test was used for comparisons (a=5%). The majority of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aging; Social inequity; Epidemiology; Indicators; Race or ethnic group distribution. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672014000300006 |
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| Sant’Helena, Bruna da Rosa Maggi; Brasileiro-Santos, Maria do Socorro; Falcão, Elis Pereira; Duarte, Denia Palmeira Fittipaldi; Pontes Filho, Nicodemos Telles de; Costa, Carlos Peres da. |
| Malnutrition is responsible for a number of alterations that occur in the organism, including alterations in the cardiovascular system. We hypothesize that long periods of malnutrition occurring after weaning may also be responsible for alterations in the cardiovascular system. Wistar rats were separated into the two following experimental groups: a labina® diet-fed control group (CG) and a malnourished group (MG), fed a multi-deficient diet. Results showed that the mg presented significantly lower body weight (p < 0.001) in rats of all ages, higher heart rate (HR) (p < 0.05) when rats were 3, 4 and 5 months old and lower HR in rats from 6 to 9 months of age, in relation to the CG. Spectral analysis showed a significant increase in the low... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 2.07.00.00-8; Aging; Multi-deficient diet; Eletrocardiography; Spectral analysis morphology of the ventricles Fisiologa. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/21482 |
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| Micic, Radoslav. |
| Due to nature of biodiesel fuel (B100) as well as biodiesel and fossil diesel oil blends these fuels demands specific conditions of storage, handling, transportation and distribution. Although it is necessary to pay attention to each of the elements in the distribution chain, the most critical operations are related to storing. Tanks for biodiesel storinghave a dominant influence on the maintenance of stable quality, as may occur, issues that directly affect the degradation in quality and problems during distribution, blending and use. In the designing process of the tank space and the installations must be taken into account all specificities of biodiesel also that materials are resistant to the influence of biodiesel and does not affect it contamination.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Transesterification of fatty acid methyl esters (FAME); Aging; Storing; Blending. |
| Ano: 2020 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5583 |
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| Registros recuperados: 83 | |
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