Thèses sur le sujet « Aging resistant »
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Parthasarathy, Krupa. « Aging Analysis and Aging-Resistant Design for Low-Power Circuits ». University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1415615574.
Texte intégralFox, Bronwyn Louise. « The manufacture, characterization and aging of novel high temperature carbon fibre composites ». View thesis entry in Australian Digital Theses Program, 2001. http://thesis.anu.edu.au/public/adt-ANU20011207.114246/index.html.
Texte intégralNakamura, Yusuke, Hiroshi Inano, Satoshi Hiroshima, Tatsuya Hirose, Masahiro Hamaguchi et Hitoshi Okubo. « Partial Discharge Resistant Aging Mechanism of Nanocomposite Enamel Wires under Repetitive Surge Voltage Condition ». IEEE, 2008. http://hdl.handle.net/2237/12130.
Texte intégralLundberg, Daniel, Filip Wilson, Hjalmar Gunnarsson, Leo Sjörén, Robin Xu et Erik Djurberg. « Long term aging and creep exposure for advanced heat resistant alloys : A phase analysis ». Thesis, Uppsala universitet, Institutionen för materialvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-446407.
Texte intégralBaxter, Christopher David Price. « An Experimental Study on the Aging of Sands ». Diss., Virginia Tech, 1999. http://hdl.handle.net/10919/28450.
Texte intégralPh. D.
Harris, Nicholas Lionel. « Stress resistance and ageing in Saccharomyces cerevisiae ». Thesis, University College London (University of London), 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.400596.
Texte intégralMacedo, Tânia Sofia Oliveira. « Improvement of the ageing resistance of 2YSZ ceramic ». Master's thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/21896.
Texte intégralZirconia is a widely studied ceramic and it is applied in several areas such as engineering (solid oxide fuel cells, thermal barrier coatings) and biomedicine, in areas such as orthopedic and odontology. This material can be applied with the purpose to restore a body function that was compromised by a degenerative disease (orthopedic implants), in dental area and sensors due to its excellent mechanical properties, aesthetic characteristics and biocompatibility. However, this ceramic is sensitive to ageing and has a low hardness. To overcome these limitations, samples of Yttria Stabilized Zirconia doped with different oxides were developed and the goal was to improve the ageing resistance and mechanical properties of un-doped 2 mol% Yttria Stabilized Zirconia (2YSZ). A careful selection of the dopants and respective concentrations was performed. According to the literature, ceria (CeO2), silica (SiO2), alumina (Al2O3), lanthana (La2O3), ytterbia (Yb2O3) and manganese oxide (MnO2) improve the ageing resistance and/or the mechanical properties of Yttria Stabilized Zirconia (YSZ). In this study, thirteen different doped 2YSZ compositions were developed. For each selected dopant, three to four compositions were performed with different dopant concentrations. After a wet milling stage, the doped stabilized zirconia powders were obtained by spray-drying, from stabilized suspensions with a controlled nanometric particle size distribution. The obtained doped sprayed powders were characterized through several techniques, such as scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray fluorescence (XRF), density and specific surface area (SSA). Green bodies of all doped compositions were obtained by uniaxial pressing (70 MPa). High density ceramics (with relative density between 90% and approximately 99%) were achieved at low sintering temperatures (1350 °C and 1400 °C). The grain size of the sintered samples was measured by SEM images, and a dispersed microstructure with a nanometric grain size was observed for all 2YSZ doped samples. The crystallographic phases present in the doped samples were identified by XRD. In order to assess their thermal ageing resistance, the samples were subjected to a thermal treatment at low temperatures (200 °C) during a period of 36 hours. After this treatment, the fracture toughness of the aged samples was evaluated. From all the starting samples, those with better resistance to thermal ageing and fracture toughness were afterwards selected: samples of 2YSZ doped with CeO2 (0.50 wt%) and with SiO2 (0.25 wt%) and La2O3 (1.07 wt%). Cylindrical bodies of the selected doped 2YSZ compositions were obtained by two pressing stages - uniaxial and cold isostatic pressing - and sintered at 1350 ºC for 3 hours. The behaviour of the sintered samples was investigated in terms of hydrothermal ageing resistance, according to the specifications mentioned in ISO 13356:2008 (134 ± 2 ºC and 0.2 MPa), and mechanical properties: Vickers’ hardness along with fracture toughness and flexural strength. The amount of monoclinic zirconia, indicative of degradation, was determined by XRD after 5 hours of ageing test. Afterwards the mechanical behaviour (Vickers hardness, fracture toughness and flexural strength) of the aged samples was assessed. The results obtained in the present study demonstrate that adequate doped 2YSZ samples, with improved hydrothermal degradation resistance (9.87 % of monoclinic zirconia for SiO2 with La2O3 doped 2YSZ sample while un-doped 2YSZ presented a monoclinic phase higher than 15 %) can be obtained. The mechanical properties of the sample of 2YSZ doped with both oxides (SiO2 and La2O3), before and after the hydrothermal ageing, were practically maintained (1159 vs 1141 HV (hardness), 9.68 vs 9.15 MPa.m1/2 (fracture toughness) and 700 vs 698 MPa (flexural strength)). Nevertheless, a decrease of the mechanical properties was observed for both selected doped 2YSZ samples in relation to un-doped sample.
A zircónia é um cerâmico amplamente estudado e aplicado em diversas áreas da engenharia (células de combustível, revestimentos de barreiras térmicas) e biomedicina, em áreas como a ortopedia e a odontologia. Este material tem sido aplicado com o propósito de restaurar funções corporais que foram comprometidas por uma doença degenerativa (implantes ortopédicos), na área dentária e em sensores, devido às suas excelentes propriedades mecânicas, características estéticas e biocompatibilidade. Atualmente, existe a necessidade de desenvolver novos dispositivos com elevadas taxas de sucesso para as aplicações médicas mencionadas. O aumento da longevidade dos dispositivos protéticos para uma população jovem, mais ativa, com maior esperança de vida, requer o desenvolvimento de novos produtos, com desempenhos e designs fiáveis. O uso de Yttria Tetragonal Zirconia Polycrystal (Y-TZP) abriu possibilidades para desenvolver novos e promissores implantes, com novas e mais complexas geometrias, que não eram possíveis com outros cerâmicos, como por exemplo a alumina (mais frágil). Contudo, a zircónia cerâmica apresenta algumas limitações de trabalho: é sensível ao envelhecimento e apresenta baixa dureza. Devido a estas limitações, foram desenvolvidas várias amostras de zircónia estabilizada com 2 mol% de ítria (2YSZ), dopadas com diferentes óxidos, com o objetivo de avaliar e melhorar a resistência ao envelhecimento e propriedades mecânicas, quando comparadas com as amostras não dopadas. Para este efeito, foi realizada uma seleção criteriosa dos dopantes e respetivas concentrações. De acordo com a literatura, a céria (CeO2), sílica (SiO2), alumina (Al2O3), lantana (La2O3), íterbia (Yb2O3) e óxido de manganês (MnO2) melhoram a resistência ao envelhecimento e/ou as propriedades mecânicas da zircónia estabilizada com ítria (YSZ).Neste estudo, foram desenvolvidas treze diferentes composições dopadas, de zircónia estabilizada com 2 mol% de ítria (2YSZ). Por cada dopante selecionado foram preparadas três a quatro composições. Após uma etapa de moagem, os pós dopados de zircónia foram obtidos por atomização, a partir de suspensões estabilizadas, com uma distribuição de tamanho de partícula nanométrico controlado. Os pós atomizados foram caracterizados recorrendo a várias técnicas tais como microscopia eletrónica de varrimento (SEM), difração de raios-X (DRX), fluorescência de raios-X (FRX), densidade real, e área superficial específica (SSA). Os corpos em verde de todas as composições foram obtidos por prensagem uniaxial (70 MPa). Foram obtidos corpos cerâmicos com densidade elevada (com densidade relativa entre 90% e aproximadamente 99%) a uma temperatura de sinterização relativamente baixa (1350 ºC e 1400 ºC). O tamanho de grão das amostras sinterizadas foi medido através de imagens SEM, sendo verificado em todas as amostras de 2YSZ dopadas, uma microestrutura dispersa, com um tamanho de grão nanométrico. As fases cristalográficas presentes nas amostras dopadas foram identificadas por DRX. A fim de avaliar a resistência ao envelhecimento, as amostras sinterizadas foram submetidas a um tratamento térmico a baixas temperaturas (200 ºC) durante um período de 36 horas. Após este tratamento foi avaliada a tenacidade à fratura das amostras envelhecidas. Com base nestes resultados selecionaram-se as amostras que apresentavam melhor resistência ao envelhecimento térmico e tenacidade à fratura: 2YSZ dopada com CeO2 (0.50 wt%) e SiO2 (0.25 wt%) com La2O3 (1.07 wt%). Os pós das composições selecionadas foram sujeitos a prensagem uniaxial seguida de prensagem isostática a frio e sinterizadas a 1350 ºC durante 3 horas. Após sinterização, o comportamento destas amostras foi investigado em termos de resistência ao envelhecimento hidrotérmico e propriedades mecânicas: dureza de Vickers, tenacidade à fratura e resistência à flexão. Os testes de envelhecimento hidrotérmico foram realizados de acordo com as especificações mencionadas na norma ISO 13356:2008 (134 ± 2 ºC e 0.2 MPa). A percentagem de zircónia monoclínica, indicador de degradação, foi determinada por difração de raios-X após 5 horas de teste de envelhecimento hidrotérmico. Posteriormente, avaliou-se o comportamento mecânico (dureza de Vickers, a tenacidade à fratura e resistência à flexão) das amostras envelhecidas. O presente estudo demonstra que podem ser obtidas amostras cerâmicas de 2YSZ dopadas adequadas, com resistência à degradação hidrotérmico melhoradas (9.87 % de zircónia monoclínica para a amostra de 2YSZ dopada com SiO2 e La2O3, enquanto que a amostra de zircónia não dopada apresenta uma percentagem de fase monoclínica superior a 15 %). As propriedades mecânicas da amostra dopada com ambos os óxidos (SiO2 e La2O3), antes e após o envelhecimento hidrotérmico, foram praticamente mantidas (1159 vs 1141 HV (dureza), 9.68 vs 9.15 MPa.m1/2 (tenacidade à fratura) e 700 vs 698 MPa (resistência à flexão)). Porém, uma diminuição das propriedades mecânicas foi observada para ambas as amostras dopadas de 2YSZ selecionadas em relação à amostra de zircónia não dopada.
Drake, Derek. « REST and the regulation of stress resistance, brain aging, and Alzheimer’s disease ». Thesis, Harvard University, 2016. http://nrs.harvard.edu/urn-3:HUL.InstRepos:33493396.
Texte intégralMedical Sciences
Platt, Thomas. « LEPTIN RESISTANCE INDUCED OBESITY AND DIABETES PROMOTE NEUROPATHOLOGICAL CHANGES IN THE AGING BRAIN ». UKnowledge, 2014. http://uknowledge.uky.edu/biochem_etds/18.
Texte intégralLi, Zhuo. « Modulation of IGFBP2 upon aging, obesity and insulin resistance in mice and humans ». Thesis, Université Laval, 2011. http://www.theses.ulaval.ca/2011/28371/28371.pdf.
Texte intégralFlack, Kyle. « Effects of Resistance Training on aged Skeletal Muscle and Mitochondrial Function ». Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/25143.
Texte intégralPh. D.
Kanemaru, Yoshinori. « Absence of GIP secretion alleviates age-related obesity and insulin resistance ». Kyoto University, 2020. http://hdl.handle.net/2433/258993.
Texte intégralWilliam, DuPont. « The Effects of Resistance Exercise Training on Cognition and Brain Function in Healthy Older Adult Women ». The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1532087071781131.
Texte intégralSchultz, Thomas. « ReRAM based platform for monitoring IC integrity and aging ». University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1573576246158436.
Texte intégralLaw, Ka-man, et 羅嘉敏. « Characterization of lipocalin-2, the pro-inflammatory adipokine, in the development of insulin resistance associated with aging and obesity ». Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hdl.handle.net/10722/192777.
Texte intégralYamada, Chizumi. « Genetic inactivation of GIP signaling reverses aging-associated insulin resistance through body composition changes ». Kyoto University, 2008. http://hdl.handle.net/2433/135794.
Texte intégralDietrich, Olaf. « Understanding the ageing consumer : exploring strategies for overcoming innovation resistance ». Thesis, University of Gloucestershire, 2016. http://eprints.glos.ac.uk/3838/.
Texte intégralO'Neill, Elaine. « The effect of insulin resistance on ageing of skeletal muscle ». Thesis, University of Liverpool, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.539510.
Texte intégralWilliamson, Kirstin. « Evolutionary trade-offs with innate immune resistance : implications for ageing, oxidative stress resistance and motor function ». Thesis, University of Southampton, 2014. https://eprints.soton.ac.uk/363662/.
Texte intégralMartins, Luiz Claudio 1964. « Estudo comparativo das alterçaões cardiovasculares na hipertensão arterial resistente controlada e não controlada ». [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/309567.
Texte intégralTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Ciencias Medicas
Made available in DSpace on 2018-08-15T16:28:07Z (GMT). No. of bitstreams: 1 Martins_LuizClaudio_D.pdf: 1037559 bytes, checksum: 4d9767531662913714e7c20456c8e484 (MD5) Previous issue date: 2010
Resumo: Introdução Hipertensão resistente é definida como a pressão arterial que permanece acima da meta pressórica, apesar do uso de 3 classes de antihipertensivos sendo um deles um diurético. Recentes diretrizes da American Heart Association (AHA-2008) consideraram também hipertensos resistentes os pacientes que usam 4 ou mais classes e possuem suas pressões controladas. No entanto, é desconhecido se as repercussões cardíacas e vasculares nos pacientes hipertensos resistentes não controlados (HARNC) e controlados (HARC) são semelhantes e qual a influência do envelhecimento sobre esses subgrupos de hipertensos resistentes (HAR). Objetivo Comparar as repercussões cardíacas e vasculares nos HARNC e HARC e avaliar a influência do envelhecimento nesses subgrupos. Métodos Após a triagem e adesão rigorosa, noventa pacientes foram separados em HARNC (n=47) e HARC (n=43). Pressão arterial sistólica (PAS), pressão arterial diastólica (PAD), pressão de pulso (PP), velocidade de onda de pulso (VOP), índice de massa do ventrículo esquerdo (IMVE), índice de massa corpórea (IMC), concentração plasmática de aldosterona (CPA) e atividade renina plasmática (ARP) foram avaliados. Realizaram-se testes estatísticos paramétricos e não paramétricos e regressão linear multivariada (RLM) e univariada (RLU). Resultados A PAS, PAD, PP, VOP, IMVE, IMC e CPA foram maiores nos HARNC (PAS=170/150/204 mmHg; PAD=100/88/130 mmHg; PP=69/40/91 mmHg; VOP=10.9/8/15.3 m/s; IMVE=179±49.2 g/m2; IMC=32±2.1 Kg/m2 e CPA=24.4±3.2 ng/dL), comparados com os HARC (PAS=143/130/163 mmHg; PAD=90/70/116 mmHg; PP=54.5/30/75 mmHg; VOP=9.5/6.8/11.3 m/s; IMVE=140.3±30.1 g/m2; IMC=28.3±1.5 Kg/m2 e CPA=19.7±2.6 ng/dL)(p<0.001). A ARP foi maior nos HARC (ARP=4.3±1.2 ng/mL/h) comparado com os HARNC (ARP=1.08±0.32 ng/mL/h)(p<0.001). A RLM mostrou que a VOP foi significativamente dependente da idade em ambos os grupos, porém a influência do envelhecimento foi mais importante nos HARNC. A RLU mostrou que a CPA se correlaciona com a VOP somente nos HAR com mais de 60 anos. Conclusões Duas características estruturais cardiovasculares não foram semelhantes nos dois grupos estudados: a hipertrofia do ventrículo esquerdo e a rigidez arterial foram maiores nos HARNC. A influência do envelhecimento foi mais significativa neste último grupo. Além disso, a CPA e o IMC foram também maiores nos HARNC. Em seu conjunto, estes dados destacam a importância da aldosterona, envelhecimento e obesidade na patogênese da hipertensão arterial resistente controlada e não controlada.
Abstract: Introduction Resistant hypertension (RH) is defined as blood pressure that remains above goal in spite of the concurrent use of three antihypertensive agents of different classes. Ideally, one of the three agents should be a diuretic and all agents should be prescribed at optimal dose amounts. Recent American Heart Association guidelines include patients who are well controlled but are also considered as having resistant hypertension if they require four or more medications. However, we do not know if both "uncontrolled" (UCRH) and "controlled" CRH) resistant hypertension patients have a similar impact on the cardiac and vascular structure and function, and how the aging influence these groups. Methods After confirming compliance to treatment, 90 patients were divided in two subgroups: UCRH (n=47) and CRH (n= 43) patients. Office blood pressure (BP), pulse wave velocity (PWV), left ventricular mass index (LVMI), body mass index (BMI), plasma aldosterone concentration (PAC) and plasma renin activity (PRA) were evaluated. Parametric and nonparametric statistical tests and multivariate and univariated linear regression analysis were performed. Objective The aim of this study was to identify patient characteristics that distinguish individuals with CRH from individuals with UCRH, We especially wanted to compare the effects of aging, RAAS activation, and vascular stiffness on lack of BP control. Results Office systolic blood pressure (SBP), diastolic blood pressure (DBP), Pulse Pressure (PP), PWV, LVMI, PAC and PRA were higher in UCRH (SBP=170/150/204mmHg; DBP=100/88/130mmHg; PP=69/40/91mmHg, PWV=10.9/8/15.3m/s; LVMI=179±49.2g/m2; BMI=32±2.1Kg/m2; PAC=24.4±3.2ng/dL) than in CRH group (SBP=143/130/163mmHg; DBP=90/70/116mmHg; PWV=9.5/6.8/11.3 m/s; LVMI=140.3±30.1g/m2; BMI=28.3±1.5Kg/m2 and PAC=19.7±2.6 ng/dL) (p<0.001). PRA was higher in CRH (PRA=4.3±1.2ng/mL/h) than in UCRH (PRA=1.08±0.32ng/mL/h)(p<0.001). Multivariate linear regression analysis of variables in function of age indicated that the PWV was significantly dependent of age in both UCRH and CRH patients; moreover, the influence of aging was more important in the former group. Univariate linear regression analysis showed that PAC correlates with PWV only in RH subjects over than 60 years old. Conclusions Clearly, at least two cardiovascular structural characteristics were not similar in the two studied groups: LV hypertrophy and arterial stiffness were more prominent in UCRH individuals and the influence of aging was more important in this group. Also, PAC and BMI were higher elevated in the UCRH group; taken together these results reinforce the concept that links obesity and RH through the hyperaldosteronism, and the important role of aldosterone in the pathogenesis of the metabolic syndrome and controlled and uncontrolled resistant hypertension.
Doutorado
Doutor em Farmacologia
SETHI, VARUN. « Effect of Aging on Abrasive Wear Resistance of Silicon Carbide Particulate Reinforced Aluminum Matrix Composite ». University of Cincinnati / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1191951786.
Texte intégralRamsey, Michael W., Bradley J. Behnke, Rhonda D. Prisby et Michael D. Delp. « Effects of Aging on Adipose Resistance Artery Vasoconstriction : Possible Implications for Orthostatic Blood Pressure Regulation ». Digital Commons @ East Tennessee State University, 2007. https://dc.etsu.edu/etsu-works/4135.
Texte intégralBehnke, Bradley J., Michael W. Ramsey, John N. Stabley, James M. Dominguez, Robert T. Davis, Danielle J. McCullough, Judy M. Muller-Delp et Michael D. Delp. « Effects of Aging and Exercise Training on Skeletal Muscle Blood Flow and Resistance Artery Morphology ». Digital Commons @ East Tennessee State University, 2012. https://dc.etsu.edu/etsu-works/4125.
Texte intégralBet, Da Rosa Orssatto Lucas. « Effects of ageing and resistance training on intrinsic motor neurone excitability ». Thesis, Queensland University of Technology, 2022. https://eprints.qut.edu.au/233612/1/Lucas_Bet%20Da%20Rosa%20Orssatto_Thesis.pdf.
Texte intégralBrown, Robert G. « The effect of progressive resistance strength training exercise on serum growth hormone and testosterone in young and elderly men ». Virtual Press, 1987. http://liblink.bsu.edu/uhtbin/catkey/494560.
Texte intégralSomogye, Ryan H. « An aging model of Ni-MH batteries for use in hybrid-electric vehicles ». Connect to resource, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1134658219.
Texte intégralAdvisor: Stephen Yurkovich, Dept. of Electrical Engineering. Includes bibliographical references (leaves 155-156). Available online via OhioLINK's ETD Center
Kastello, Gary M. « The effects of aging, exercise and food restriction on the development of insulin resistance in adipocytes of young rats ». Virtual Press, 1987. http://liblink.bsu.edu/uhtbin/catkey/495214.
Texte intégralJambassi, Filho José Claudio [UNESP]. « O efeito de diferentes intervalos de recuperação entre as séries do treinamento com pesos, nas respostas neuromusculares e do hormônio do crescimento, em idosas treinadas ». Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/87381.
Texte intégralConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Esta dissertação explorou por meio de dois estudos o efeito de diferentes intervalos de recuperação (IR) entre as séries do treinamento com pesos (TP) nas respostas: 1) neuromusculares agudas [número de repetições (NR) por séries, sustentabilidade das repetições entre as séries, volume total, contração voluntária máxima (CVM) e atividade eletromiográfica (atividade EMG)] e crônicas [da CVM, taxa de desenvolvimento de força pico (TDFP) e cargas absolutas de 15 repetições máximas (15 RM)]; 2) agudas das concentrações do hormônio do crescimento (GH). O primeiro estudo foi concluído com 21 participantes (66,4 +- 4,4 anos) e o segundo com 19 participantes (66,1+- 4,3 anos). Inicialmente todas as participantes realizaram duas sessões de familiarização aos procedimentos de avaliação da curva força-tempo isométrica (Cf-t isométrica) e três sessões para determinação das cargas referentes a 15 RM no exercício leg-press. Nas três visitas subseqüentes, foram realizadas duas sessões de teste adotando-se IR entre as séries de um (IR-1) e três (IR-3) minutos e uma sessão controle. Nas sessões de teste, as participantes realizaram três séries até a fadiga muscular com a carga de 15 RM e avaliações da curva força-tempo isométrica (Cf-t isométrica) e da atividade EMG pré e cinco minutos pós-sessões de teste. Na sessão controle, as participantes realizaram as mensurações da Cf-t isométrica e da atividade EMG pré e após permanecerem em repouso por 15 minutos. Após as coletas iniciais, as participantes foram separadas aleatoriamente em dois grupos: um treinou com IR de um minuto (G-1 min) entre todas as séries e o outro com três minutos (G-3 min). Ambos os grupos realizaram oito semanas de TP com as seguintes características: a) três sessões semanais; b) oito exercícios; c) intensidade relativa...
This dissertation explored through two studies the effect of different rest intervals (RI) between sets of resistance training (RT) in the responses: 1) acute neuromuscular [number of repetitions (NR) in sets, sustainability of repetitions between sets, total volume, maximal voluntary contraction (MVC) and electromyography activity (EMG activity)] and chronic [MVC, rate of force development peak (RFDP) and absolute loads of 15 repetitions maximum (15 RM)]; 2) acute concentrations of growth hormone (GH). The first study was completed with 21 participants (66.4 +- 4.4 years) and the second with 19 participants (66.1 +- 4.3 years). Initially, all participants performed two familiarization sessions to procedures of the isometric force-time curve (Cf-t isométrica) and three sessions to determine the load corresponding to 15 RM in the exercise leg-press. In three subsequent visits, there were performed two test sessions adopting IR between sets of one (RI-1) and three (RI-3) minutes and one control session. In test sessions, the participants performed three sets to muscular fatigue with the load of 15 RM and evaluations of Cf-t isometric and EMG activity pre and five minutes post-test session. In the control session, the participants performed measurements of Cf-t isometric and EMG activity before and after remaining at rest for 15 minutes. After the initial collection, participants were divided randomly into two groups: one trained with one minute (G-1 min) between all sets and the other with three minutes (G-3 min). Both groups performed eight weeks of RT with the following characteristics: a) three times a week b) eight exercises; c) relative intensity adjusted so that muscular fatigue occurred in 15 RM in the last set. At the end of eight weeks of RT, the participants were retest again... (Complete abstract click electronic access below)
Alipour, A. « Characterization of Elastomer Nanocomposite Blends Based on NR/EPDM/Organoclay ». Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35610.
Texte intégralLockyer, Scott Andrew. « The strength and fatigue resistance of a precipitate strengthened Cu-Ni-Si alloy ». Thesis, University of Liverpool, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240271.
Texte intégralSuttman, Alexander K. « Lithium Ion Battery Aging Experiments and Algorithm Development for Life Estimation ». The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1306937891.
Texte intégralHausman, Natasha L. « The influence of caveolin-1 and ageing on resistance artery structure and function ». Thesis, University of Manchester, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.514440.
Texte intégralGroshong, Jason S. « THE ROLE OF MACROPHAGES IN EXERCISE AND INSULIN RESISTANCE IN HUMAN SKELETAL MUSCLE ». UKnowledge, 2013. http://uknowledge.uky.edu/physiology_etds/13.
Texte intégralMartin, Richard Joseph. « Planning for Decisional Incapacity : Resistance to Cognitive Bias in Older Adults ». Case Western Reserve University School of Graduate Studies / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case1562347931852291.
Texte intégralJambassi, Filho José Claudio. « O efeito de diferentes intervalos de recuperação entre as séries do treinamento com pesos, nas respostas neuromusculares e do hormônio do crescimento, em idosas treinadas / ». Rio Claro : [s.n.], 2011. http://hdl.handle.net/11449/87381.
Texte intégralBanca: Mara Patricia T. Chacon Mikahil
Banca: Vilmar Baldissera
Resumo: Esta dissertação explorou por meio de dois estudos o efeito de diferentes intervalos de recuperação (IR) entre as séries do treinamento com pesos (TP) nas respostas: 1) neuromusculares agudas [número de repetições (NR) por séries, sustentabilidade das repetições entre as séries, volume total, contração voluntária máxima (CVM) e atividade eletromiográfica (atividade EMG)] e crônicas [da CVM, taxa de desenvolvimento de força pico (TDFP) e cargas absolutas de 15 repetições máximas (15 RM)]; 2) agudas das concentrações do hormônio do crescimento (GH). O primeiro estudo foi concluído com 21 participantes (66,4 +- 4,4 anos) e o segundo com 19 participantes (66,1+- 4,3 anos). Inicialmente todas as participantes realizaram duas sessões de familiarização aos procedimentos de avaliação da curva força-tempo isométrica (Cf-t isométrica) e três sessões para determinação das cargas referentes a 15 RM no exercício leg-press. Nas três visitas subseqüentes, foram realizadas duas sessões de teste adotando-se IR entre as séries de um (IR-1) e três (IR-3) minutos e uma sessão controle. Nas sessões de teste, as participantes realizaram três séries até a fadiga muscular com a carga de 15 RM e avaliações da curva força-tempo isométrica (Cf-t isométrica) e da atividade EMG pré e cinco minutos pós-sessões de teste. Na sessão controle, as participantes realizaram as mensurações da Cf-t isométrica e da atividade EMG pré e após permanecerem em repouso por 15 minutos. Após as coletas iniciais, as participantes foram separadas aleatoriamente em dois grupos: um treinou com IR de um minuto (G-1 min) entre todas as séries e o outro com três minutos (G-3 min). Ambos os grupos realizaram oito semanas de TP com as seguintes características: a) três sessões semanais; b) oito exercícios; c) intensidade relativa... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: This dissertation explored through two studies the effect of different rest intervals (RI) between sets of resistance training (RT) in the responses: 1) acute neuromuscular [number of repetitions (NR) in sets, sustainability of repetitions between sets, total volume, maximal voluntary contraction (MVC) and electromyography activity (EMG activity)] and chronic [MVC, rate of force development peak (RFDP) and absolute loads of 15 repetitions maximum (15 RM)]; 2) acute concentrations of growth hormone (GH). The first study was completed with 21 participants (66.4 +- 4.4 years) and the second with 19 participants (66.1 +- 4.3 years). Initially, all participants performed two familiarization sessions to procedures of the isometric force-time curve (Cf-t isométrica) and three sessions to determine the load corresponding to 15 RM in the exercise leg-press. In three subsequent visits, there were performed two test sessions adopting IR between sets of one (RI-1) and three (RI-3) minutes and one control session. In test sessions, the participants performed three sets to muscular fatigue with the load of 15 RM and evaluations of Cf-t isometric and EMG activity pre and five minutes post-test session. In the control session, the participants performed measurements of Cf-t isometric and EMG activity before and after remaining at rest for 15 minutes. After the initial collection, participants were divided randomly into two groups: one trained with one minute (G-1 min) between all sets and the other with three minutes (G-3 min). Both groups performed eight weeks of RT with the following characteristics: a) three times a week b) eight exercises; c) relative intensity adjusted so that muscular fatigue occurred in 15 RM in the last set. At the end of eight weeks of RT, the participants were retest again... (Complete abstract click electronic access below)
Mestre
Ahmad, Syed Sajid. « Characterizing the Aging-Driven Degradation Rate of Electrical Contact Resistance and Mechanical Integrity of Plastic-Encapsulated Au/Al Wire Bonds ». Diss., North Dakota State University, 2015. http://hdl.handle.net/10365/24926.
Texte intégralClifford, Angela. « Physical activity and cognition in the elderly ». Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/12494.
Texte intégralTsaousidou, Eva [Verfasser], Jens Claus [Akademischer Betreuer] Brüning et Sigrun [Akademischer Betreuer] Korsching. « Hypothalamic Inflammation in Obesity, Insulin Resistance and Ageing / Eva Tsaousidou. Gutachter : Jens Claus Brüning ; Sigrun Korsching ». Köln : Universitäts- und Stadtbibliothek Köln, 2015. http://d-nb.info/1078997772/34.
Texte intégralPhillips, Bethan E. « Resistance-exercise training : the effects on muscle function, body composition and risk factors for chronic disease with ageing ». Thesis, University of Nottingham, 2012. http://eprints.nottingham.ac.uk/12796/.
Texte intégralMohamad, Mashani. « The Role of the Liver Sinusoidal Endothelial Cells in the Pathophysiology of Insulin Resistance ». Thesis, The University of Sydney, 2016. http://hdl.handle.net/2123/15716.
Texte intégralEmerson, Nadia. « The Effects of 6-weeks of Resistance Training on the Neuromuscular Fatigue Threshold in Older Adults ». Master's thesis, University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5631.
Texte intégralM.S.
Masters
Child, Family, and Community Sciences
Education and Human Performance
Sport and Exercise Science; Applied Exercise Physiology
Olofsson, Magnus. « Microbiological Surveillance in Primary Health Care : New Aspects of Antimicrobial Resistance and Molecular Epidemiology in an Ageing Population ». Doctoral thesis, Linköpings universitet, Institutionen för medicin och hälsa, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-133246.
Texte intégralEmiliani, Marco. « Development of measurement procedures for the evaluation of energy performances and ageing resistance of innovative cool coloured materials ». Doctoral thesis, Università Politecnica delle Marche, 2014. http://hdl.handle.net/11566/242845.
Texte intégralThe objective of the present work is to define test procedures for the evaluation of energy and durability performances of innovative cool coloured products developed within COOL-Coverings project, co-funded by EU commission under FP7. These materials are spectrally selective (absorbing in the visible and reflecting in the NIR) thus combining aesthetics (colour) and cooling capabilities. Three products have been addressed: ceramic tiles and paints for façades and bituminous roof membranes. Radiative properties have been initially analysed with a spectrophotometer. To understand the impact of such technologies on buildings, a testing protocol has been defined in which cool and standard materials are applied to calibrated mock-ups and different thermal parameters are continuously monitored. Cooling energy savings have been finally estimated for different climates and applications using numerical building models validated by the experimental data collected in the demo campaign. Besides energy performances, an important issue for cool materials is represented by natural ageing that can determine a progressive reduction of radiative properties over the time. Current standards define a period of 3 years for the evaluation of ageing resistance. Such a duration is not compatible with industrial needs, while existing accelerated standards are not adequate, neglecting the soiling effect that has instead a large impact on cool performances. Part of the research was therefore dedicated to investigate ageing mechanisms identifying the main factors and quantifying the loss of reflectance on standard and cool materials. Finally, an accelerated ageing method recently proposed by the LBNL to simulate 3 year ageing in few days of lab test has been analysed. The applicability of this procedure, designed for roof and US climate, has been verified also for new products and Mediterranean climate demonstrating a correlation degree with natural testing higher than current predictive models.
Hurst, Christopher. « Combined exercise training in older adults : application of a hydraulic resistance machine for multicomponent fitness improvement ». Thesis, Teesside University, 2017. http://hdl.handle.net/10149/621728.
Texte intégralCristea, Alexander. « Effects of Ageing and Physical Activity on Regulation of Muscle Contraction ». Doctoral thesis, Uppsala University, Department of Neuroscience, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-9198.
Texte intégralThe aims of this study were to investigate the mechanisms underlying (1) the ageing-related motor handicap at the whole muscle, cellular, contractile protein and myonuclear levels; and (2) ageing-related differences in muscle adaptability.
In vivo muscles function was studied in the knee extensors. Decreases were observed in isokinetic and isometric torque outputs in old age in the sedentary men and women and elite master sprinters. A 20-week long specific sprint and resistance training successfully improved the maximal isometric force and rate of force development in a subgroup of master sprinters.
In vitro measurements were performed in muscle biopsies from the vastus lateralis muscle. Immunocytochemical and contractile measurements in single membrane permeabilized muscle fibres demonstrated ageing- and gender-related changes at the myofibrillar level. In sedentary subjects, data showed a preferential decrease in the size of muscle fibres expressing type IIa MyHC in men, lower force generating capacity in muscle fibres expressing the type I MyHC isoform in both men and women and lower maximum velocity of unloaded shortening (V0) in fibres expressing types I and IIa MyHC isoforms in both men and women. The master sprinters also experienced the typical ageing-related reduction in the size of fast-twitch fibres, a shift toward a slower MyHC isoform profile and a lower V0 of type I MyHC fibres, which played a role in the decline in explosive force production capacity. The fast-twitch fibre area increased after the resistance training period. A model combining single muscle fibre confocal microscopy with a novel algorithm for 3D imaging of myonuclei in single muscle fibre segments was introduced to study the spatial organisation of myonuclei and the size of individual myonuclear domains (MNDs). Significant changes in the MND size variability and myonuclear organization were observed in old age, irrespective gender and fibre type. Those changes may influence the local quantity of specific proteins per muscle fibre volume by decreased and/or local cooperativity of myonuclei in a gender and muscle fibre specific manner.
In conclusion, the ageing-related impairments in in vivo muscle function were related to significant changes in morphology, contractile protein expression and regulation at the muscle fibre level. It is suggested that the altered myonuclear organisation observed in old age impacts on muscle fibre protein synthesis and degradation with consequences for the ageing-related changes in skeletal muscle structure and function. However, the improved muscle function in response to a 20-week intense physical training regime in highly motivated physically active old subjects demonstrates that all ageing-related in muscle function are not immutable.
Siaugues, Caroline. « Du « rencard » au « rancart » ? Une expérience psychique de passage : la retraite professionnelle de la femme ». Thesis, Sorbonne Paris Cité, 2016. http://www.theses.fr/2016USPCB176.
Texte intégralExperiencing transition to retirement seems likely to induce disorder on many women's psychic scenes. As often happens, retiring from one's job is the focus of cherished expectations associated to merit and deliverance. Yet, it also portends getting on in years: it cannot therefore be envisaged without dealing with the problems incurred by coping with age. In support of 28 research interviews conducted with 60 to 66-year old retired women, this thesis aims to understand both the complexity and singularity of the psychic work required by such transitioning experience. This research shows that the mental processing of reaching retirement-age depends on the person's emotional organization. In addition, some effects associated with the hierarchical status enjoyed by women during a busy professional career also make it possible to approach the specific modalities of disinvesting the "work-object" and the "professional scene". Lastly -- since it is likely to upset both their grounding and the spheres conquered by women -- reaching retirement seems to fully reconvene some psychological problems inherent in adolescence work, sometimes providing the opportunity of deepening it. This thesis seeks to promote a reflection on working at cultural level and "setting up ways of sharing" its objects
Siebold, Alexander Paul King. « Investigation into the role of Polycomb Repressive Complex 2 in the modulation of life span and stress resistance in Drosophila melanogaster ». Case Western Reserve University School of Graduate Studies / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=case1274371273.
Texte intégralGirÃo, Daniel de Castro. « Influence of sigma phase in the corrosion resistance of super duplex stainless steel ASTM A890 grade 1C after isothermal treatment ». Universidade Federal do CearÃ, 2015. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=15245.
Texte intégralOs aÃos inoxidÃveis super duplex sÃo frequentemente utilizados em aplicaÃÃes onde à necessÃria uma grande resistÃncia mecÃnica, combinada a resistÃncia à corrosÃo, especialmente em ambientes de elevada agressividade. Entretanto, ao sofrer determinados processos de fabricaÃÃo (conformaÃÃo a quente ou soldagem, por exemplo), pode ocorrer à precipitaÃÃo de fases indesejÃveis, que causam tanto reduÃÃo de propriedades mecÃnicas quanto afetam a resistÃncia à corrosÃo. Particularmente entre 700 ÂC e 900 ÂC pode ocorrer à formaÃÃo de fase sigma. Esta fase à responsÃvel pela reduÃÃo da resistÃncia à corrosÃo e mecÃnica dos aÃos inoxidÃveis super duplex. Por meio de simulaÃÃo computacional no programa Thermo-CalCÂ, o diagrama de fases do aÃo inoxidÃvel super duplex ASTM A890 GRAU 1C apresentou maior fraÃÃo precipitada desta fase na temperatura de 830 ÂC. Assim, o presente trabalho tem por objetivo avaliar a influÃncia do tempo de tratamento isotÃrmico de envelhecimento deste material, na resistÃncia à corrosÃo devido à formaÃÃo da fase sigma. A avaliaÃÃo da resistÃncia à corrosÃo foi realizada por meio do monitoramento do potencial de circuito aberto, impedÃncia eletroquÃmica e de ensaios de polarizaÃÃo potenciodinÃmica (ramo anÃdico) em soluÃÃo de H2SO4 0,5 M, H2SO4 0,5 M + HCl 0,5 M e HCl 0,5 M, nas temperaturas de 25, 35 e 45 ÂC. Adicionalmente, foi realizada a caracterizaÃÃo microestrutural desse material atravÃs de quantificaÃÃo de fases por microscopia Ãtica, anÃlise morfolÃgica por Microscopia EletrÃnica de Varredura e TransmissÃo, acoplados as tÃcnicas de DifraÃÃo de ElÃtrons Retroespalhados e Espectroscopia de DispersÃo de Energia de ElÃtrons, alÃm de medidas de microdureza vickers. A caracterizaÃÃo microestrutural e morfolÃgica confirmou a presenÃa de fase sigma no aÃo inoxidÃvel super duplex 1C e que a quantidade desta fase aumenta com o tempo de tratamento tÃrmico de envelhecimento. Esta fase apresentou microdureza maior que as fases ferrita e austenita. O tratamento tÃrmico de envelhecimento influenciou de maneira negativa na resistÃncia a corrosÃo desse aÃo quando exposto a soluÃÃes Ãcidas de H2SO4 e HCl a 25 C, principalmente quando este estÃo presentes na mesma soluÃÃo, devido provavelmente ao seu baixo pH. Nesta soluÃÃo (H2SO4 + HCl), tanto o aumento do tempo de tratamento tÃrmico de envelhecimento quanto o aumento da temperatura (35 e 45 ÂC), afetam negativamente na resistÃncia à corrosÃo do material estudado, diminuindo à medida que se tem um maior conteÃdo de fase sigma.
森脇, 隆仁. « 線虫 Caenorhabditis elegans を用いたストレス応答機構に関する研究 ». 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/188521.
Texte intégralGrünz, Gregor [Verfasser], Hannelore [Akademischer Betreuer] Daniel, Johann J. [Akademischer Betreuer] Hauner et Martin [Akademischer Betreuer] Klingenspor. « Structure-activity relationship of selected flavonoids on aging and stress-resistance in Caenorhabditis elegans / Gregor Grünz. Gutachter : Hannelore Daniel ; Johann J. Hauner ; Martin Klingenspor. Betreuer : Hannelore Daniel ». München : Universitätsbibliothek der TU München, 2012. http://d-nb.info/1024964000/34.
Texte intégral