Dissertations / Theses on the topic 'Rice aging'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 30 dissertations / theses for your research on the topic 'Rice aging.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Xu, Jinyong. "Development of metal oxide-based gas sensors for the detection of biomarkers in rice aging." Electronic Thesis or Diss., Bourgogne Franche-Comté, 2024. http://www.theses.fr/2024UBFCA007.
This study aims to develop high-performance metal oxide-based gas sensors for room-temperature detection of biomarkers in rice aging by incorporating oxygen vacancies. Three metal oxides, namely W18O49, CeO2-x, and ZnO/ZnSnO3 are successfully fabricated through strategies that combined a simple hydrothermal method with different surface modifications including noble metal loading, and structural regulation. The morphologies and phase compositions of the obtained metal oxides are investigated using a field emission-scanning electron microscope (FE-SEM), X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), and X-ray photoelectron spectroscope (XPS). The room-temperature gas-sensing performance, including sensitivity, response/recovery time, selectivity, and stability, of these metal oxides in detecting biomarkers in rice aging, is comprehensively investigated to explore the influence of Ru loading, post-treatment, and hydrogen flow on the enhanced gas-sensing properties, represented by the reduction of working temperature and the improvement of sensitivity. The room-temperature gas-sensing mechanism in the analysis of the characteristic biomarker is proposed. Furthermore, the practicability of the developed gas sensors is verified by two varieties of rice (Japonica rice and Indica rice).Material characterizations reveal that metal oxides with different morphologies and structures are successfully prepared by the hydrothermal and solution precursor plasma spray (SPPS) methods. Their microstructure evolutions are precisely manipulated by Ru incorporation, annealing under different atmospheres, and adjusting the flow of hydrogen, respectively. The gas-sensing performance investigations exhibit that the obtained metal oxides displayed excellent room-temperature gas-sensing properties, including high sensitivity, rapid response/recovery time, and low detection limit, towards the characteristic biomarkers such as nonanal, linalool, and 2-Undecanone. The enhanced room-temperature gas-sensing performance is chiefly due to the synergistic effects of their unique structures, and the incorporation of oxygen vacancies. In addition, the experimental results show that Ru-loaded W18O49 and CeO2-x annealed under the atmosphere (5%H2+95%Ar) may be able to distinguish Indica rice from Japonica rice. Conversely reversal conducting behaviors can be observed when ZnO/ZnSnO3 fabricated with the hydrogen flow of 3 L/min is exposed to two varieties of rice. Most importantly, SPPS stands out in solving the limitations, such as slow particle growth and insufficient oxygen vacancies in crystals, which exists in the above-stated methods (noble metal loading and post-treatment). Because of its intrinsic characteristics, SPPS can effectively incorporate highly concentrated oxygen vacancies into metal oxides, and also construct heterostructures due to the different volatilization rates of metal sources, especially in the fabrication of ternary metal oxides, collectively enhancing the gas-sensing properties of metal oxides
Sanchez, Christine. "Aging with Identity: Integrating Culture into Senior Housing." [Tampa, Fla] : University of South Florida, 2008. http://purl.fcla.edu/usf/dc/et/SFE0002669.
Noboa, Carlamarie Ramos. "Factors Influencing Alzheimer's Disease Healthcare Utilization Patterns in Puerto Rico." Thesis, Walden University, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10973675.
Alzheimer’s disease (AD) is associated with substantial healthcare utilization costs, resulting in a public health priority. In this study, the relationship between the demographic characteristics of age, gender, and type of health insurance; the presence of comorbidities of older Puerto Rican residents diagnosed with AD; and their healthcare utilization patterns (i.e., medical office and emergency room visits and hospital admissions) was examined using Andersen’s behavioral model. Data from the 2013 Puerto Rico Health Study was used in this retrospective cohort design study. All AD cases aged ≥ 60 years were extracted using systematic random sampling. One-way ANOVA-WELCH, Mann-Whitney U test, and negative binomial regressions determined if there was a relationship between independent and dependent variables. Results indicated a statistically significant relationship between age, gender, health insurance type, and presence of comorbidities factors and healthcare utilization patterns among older Puerto Ricans with AD. From the results, opportunities were identified for further research and changes in professional practices in order to initiate discussions and action plans to improve services coordination for older Puerto Ricans with AD. Findings might impact social change by inspiring modifications to the public health infrastructure. These modifications may lead to enhanced disease management support, promoted social justice, and increased resources to improve healthcare access and quality of care, and overall enhancement of health outcomes, for Puerto Ricans living with AD.
Hosseini, Ramin. "Single strand-preferring nuclease (SSPN) activity and ultrastructural changes in ageing rice cells." Thesis, University of Nottingham, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285570.
Lau, Ka-chi. "Assessing the problems of implementing major improvement works in aging private residential buildings in Hong Kong." Click to view the E-thesis via HKUTO, 2003. http://sunzi.lib.hku.hk/hkuto/record/B31969148.
Li, Wan-kam. "The threats of aging private buildings in Hong Kong : assessing social, environmental and physical externalities /." View the Table of Contents & Abstract, 2008. http://sunzi.lib.hku.hk/hkuto/record/B4098848X.
Li, Wan-kam, and 李韻琴. "The threats of aging private buildings in Hong Kong: assessing social, environmental and physicalexternalities." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B45009351.
Lau, Ka-chi, and 劉家池. "Assessing the problems of implementing major improvement works in aging private residential buildings in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B31969148.
Pomales, Tony Orlando. "“Estamos de pie y en lucha”/“We are standing and fighting”: aging, inequality, and activism among sex workers in neoliberal Costa Rica." Diss., University of Iowa, 2015. https://ir.uiowa.edu/etd/1728.
Howard, Claire Louise. "SPARC (secreted protein, acidic and rich in cysteine) in the retinal pigment epithelium and ocular basement membranes of the ageing eye." Thesis, University of Liverpool, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.540052.
Tran, Thi Phuong Thao. "Développement de biocomposites à base de Poly(Acide Lactique) et de balles céréalières : vieillissement des biocomposites et traitement de surface des balles." Thesis, Montpellier 2, 2013. http://www.theses.fr/2013MON20203/document.
The cereal husks, namely the envelope around the grain, have recently attracted the attention of scientists for biocomposites development, because they are low-cost, renewable, biodegradable, and available in abundant volume throughout the world. Their chemical composition and their thermal and mechanical properties are similar to the natural fibers.In this work, two types of rice husk and two types of Einkorn wheat husk were studied through their microstructure, chemical composition, mechanical and thermal properties. The husks have been incorporated into a bio-sourced and biodegradable matrix, namely poly (lactic acid) (PLA) to produce biocomposite which functional properties were studied. It appears that the husks can be good candidates for strengthening the PLA through improved adhesion at the interface between the husks and the PLA.To improve the husks/PLA interface, the husks were treated with an alkaline solution (NaOH) and organosilane coupling agents, such as 3-aminopropyltriethoxysilane and 3 - glycidoxypropyltrimethoxysilane. The alkaline treatment has removed much of hemicelluloses, lignin, wax and silica present in the husks. The dissolution of these components resulted in a higher hygroscopicity of husks and lower mechanical properties of biocomposites. The coupling between an alkaline treatment and a silane treatment seems to provide better properties than the silane treatment alone. This surface treatment has a greater impact on the Einkorn wheat husks than on rice husksThe variations of the functional properties of rice husks based biocomposites during different ageings (thermal ageing, hydro-thermal ageing, hygro-thermal cycled ageing, UV ageing) was studied. The results show that the microstructural changes induced by ageing significantly influence the properties of biocomposites. Biocomposites degradation results in a decrease of the average molecular weight of PLA. The reorganization of these macromolecules significantly increases the degree of crystallinity of the material. This causes a change in color, dimensional stability of devices and mechanical properties of PLA and biocomposites which essentially depends on the ageing temperature regards to the glass transition temperature of PLA. It appears that the addition of husks accelerates the degradation of PLA. In the case of a hydro-thermal ageing performed above the glass transition temperature of the PLA, a reduction of this degradation was demonstrated by the use of specific surface treatments of husks
Lambert, Delphine. "Influence d’un régime riche en graisses sur un modèle de vieillissement « accéléré » : étude de la fonction et de la morphologie cardiaque, la fonction artérielle, le métabolisme et l’inflammation." Thesis, Université de Lorraine, 2016. http://www.theses.fr/2016LORR0266/document.
Obesity and being overweight have been described as a global pandemic. Both obesity and aging will lead to cardiovascular complications. In addition, it has been highlighted that obesity promotes premature cardiac aging in young adults. The hypothesis of this work is that a high fat diet begun before adulthood, pursued over a long period of time, could lead to “accelerated” cardiovascular and metabolic aging. We have demonstrated, in an aging mouse model, that an early high fat diet leads to metabolic disorders and to an increase in fat mass and a deterioration in metabolism of white adipose tissue. These disorders are associated with alterations in cardiac morphology and function, despite an absence of changes in blood pressure and heart rate. Ageing, in obese mice, leads to ventricular remodeling accompanied by systolic dysfunction. In cardiac tissue, aging and early diet lead to an increased expression of fibrosis genes confirming the hypertrophic phenotype. Aging associated with an early high fat diet led also to an up-regulation of GDF11. GDF11 may then be considered as a marker of accelerated cardiac aging. These results may suggest therapeutic or preventive pathways, where inhibition of GDF11 improves prognosis and survival in obese subjects with cardiovascular disease. The study of this model has allowed us to demonstrate that a high fat diet leads to accelerated aging at the level of the heart
Gatineau, Eva. "Impact d'un régime riche en saccharose sur la sarcopénie chez le rat âgé ; Conséqences métaboliques au niveau hépatique et cérébral. Effets préventifs d'un mélange de micronutriments. Spécialité." Thesis, Clermont-Ferrand 1, 2015. http://www.theses.fr/2015CLF1MM14/document.
With aging, several alterations occur, including a loss of muscle mass and function, called sarcopenia. Many factors are responsible for the development of sarcopenia, but some factors as inflammation, oxidative stress and insulin resistance, which have many deleterious effects during aging, can reduce meal-induced stimulation of muscle protein synthesis which was shown to partly explain age-related muscle mass loss. Those factors can be induced by a diet rich in added sugar, characteristic of current dietary habits. Although this kind of diet could accelerate aging features, little is known about combined effect of aging and high sugar diet, particularly on sarcopenia. Thus, the purpose of this work was to determine whether high chronic intake of added sugars could accelerate sarcopenia. We also interested in the combined effect of added sugars and aging on other exposed tissues: liver and brain. Finally, we assessed the preventive effects of a micronutrient supplementation both in vivo and in vitro.In order to do that, for 5 months, 16 month old rats were starch fed or sucrose fed (62% sucrose), with or without micronutrients supplementation (rutin, vitamin A, vitamin E, vitamin D, selenium and zinc). Additionally, an adult control group of 8 month old rats was included. Besides, anti-inflammatory effects of micronutrients were tested in vitro.We showed that high sucrose diet accelerated age-related muscle mass loss by impairing postprandial protein synthesis, likely through decreased insulin sensitivity since inflammation and oxidative stress were only slightly affected by high sucrose diet. This diet also resulted in fat mass gain and increased plasma and liver triglycerides, by modulating the activity of enzymes involved in liver lipid metabolism. In the brain, high sucrose consumption led to decreased protein concentration independently of protein synthesis alteration. Micronutrients supplementation only partially reversed high sucrose diet effects: it did not act on lean body mass but prevented fat mass gain, by inhibiting hepatic lipogenesis. It also restored brain protein synthesis, which was reduced by aging. In vitro, it reduced experimentally induced inflammation.Thus, this work showed that a high sucrose diet accelerates sarcopenia in old rats but also induces liver and brain alterations. Prevention by micronutrients remained limited
Felipe, Renata Carla Tavares Santos. "Envelhecimento ambiental acelerado em PRF a base de tecidos h?bridos kevlar/vidro: propriedades e instabilidade estrutural." Universidade Federal do Rio Grande do Norte, 2012. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15592.
There are a number of damaging mechanisms that various materials can suffer in service. However, when working with polymer composite materials, this is something that requires analysis, especially when exposed to adverse environmental conditions. Thus, the objective of the present thesis is the study of the direct influence of environmental aging and the form of hybridization of the reinforcement woven on the structural stability, surfacedegradation and fracture process of polymer composites laminates. For this, the development of two polymer composite laminates was necessary, where one of them was reinforced with a bi-directional woven with hybrid strandsofkevlar-49/glass-Efibers, and the other also with a bi-directionalwoven, however with weft and warpformed of alternating strandsof Kevlar-49 fibers and glass-E fiber The reinforcementwoven are industrially manufactured. Both laminates use a polyester resin as a matrixand are made up of four layers each. All laminates were industrially prepared by the hand lay-up method of manufacturing. To do this, test specimens were manufactured of the respective laminates and submitted to environmental aging accelerated through the aging chamber. They were exposed to alternating cycles of UV radiation and moisture (heated steam) for a standard defined period. At the end of the exposure period the specimens were subjected to mechanical tests of uniaxial tensile and bending in three points and to the characterizationsof the fracture and surface deterioration. In addition, they were submitted to a structural degradation assessment by the measurement of mass variation technique (MMVT) and the measurement of thickness variation technique (MTVT), this last technique being developed in this thesis. At the end of the analysis it was observed that the form of hybridization of the reinforcement woven and the aging process directly influence with losses or gain in mechanical properties, with losses in the structural degradation and in the formation and propagation of damage mechanism of the developedcomposite laminates
S?o v?rios os mecanismos de danos que os diversos materiais podem sofrer em servi?o. No entanto, ao se trabalhar com os materiais comp?sitos polim?ricos isso ? algo que necessita de an?lises principalmente quando expostos a condi??es ambientais adversas. Logo, a respectiva tese objetiva o estudo da influ?ncia direta do envelhecimento ambiental e da forma de hibridiza??o dos tecidos de refor?o no comportamento mec?nico, degrada??o estrutural (dimensional e de massa) de laminados comp?sitos polim?ricos. Para tanto se fez necess?rio o desenvolvimento de dois laminados comp?sitos polim?ricos, onde um deles ? refor?ado com um tecido bidirecional com mecha h?brida de fibras de kevlar-49/vidro-E e o outro com um tecido tamb?m bidirecional, por?m com trama e urdume formadas com mechas alternadas de fibras kevlar-49 e fibras de vidro-E. Os tecidos de refor?o s?o de fabrica??o industrial. Ambos os laminados utilizam como matriz a resina de poli?ster, sendo constitu?dos de quatro camadas cada. Todos os laminados foram confeccionados industrialmente pelo m?todo de fabrica??o handlay-up. Desta forma, foram fabricados corpos de provas (CP s) dos respectivos laminados e submetidos ao envelhecimento ambiental acelerado atrav?s da c?mara de envelhecimento. Os mesmos foram expostos aos ciclos alternados de radia??o UV e umidade (vapor aquecido) por um per?odo definido em norma. Ao t?rmino do per?odo de exposi??o os CP s foram submetidos aos ensaios mec?nicos de tra??o uniaxial e flex?o em tr?s pontos e ?s caracteriza??es da fratura e da deteriora??o superficial. Al?m disso, foram submetidos ? avalia??o da degrada??o estrutural mediante a t?cnica de media??o de varia??o de massa (TMVM) e a t?cnica de medi??o de varia??o de espessura (TMVE), sendo essa ?ltima desenvolvida nesta tese. Ao t?rmino das an?lises foi observado que a forma de hibridiza??o dos tecidos de refor?o e o processo de envelhecimento influenciam diretamente, seja com perdas ou ganho naspropriedades mec?nicas, com perdas na degrada??o estrutural e na forma??o e propaga??o do mecanismo de dano dos laminados comp?sitos desenvolvidos
Felipe, Raimundo Nonato Barbosa. "Efeitos da radia??o uv, temperatura e vapor aquecido nos comp?sitos polim?ricos: monitoramento, instabilidade estrutural e fratura." Universidade Federal do Rio Grande do Norte, 2012. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15594.
The application of composite materials and in particular the fiber-reinforced plastics (FRP) has gradually conquered space from the so called conventional materials. However, challenges have arisen when their application occurs in equipment and mechanical structures which will be exposed to harsh environmental conditions, especially when there is the influence of environmental degradation due to temperature, UV radiation and moisture in the mechanical performance of these structures, causing irreversible structural damage such as loss of dimensional stability, interfacial degradation, loss of mass, loss of structural properties and changes in the damage mechanism. In this context, the objective of this thesis is the development of a process for monitoring and modeling structural degradation, and the study of the physical and mechanical properties in FRP when in the presence of adverse environmental conditions (ageing). The mechanism of ageing is characterized by controlled environmental conditions of heated steam and ultraviolet radiation. For the research, it was necessary to develop three polymer composites. The first was a lamina of polyester resin reinforced with a short glass-E fiber mat (representing the layer exposed to ageing), and the other two were laminates, both of seven layers of reinforcement, one being made up only of short fibers of glass-E, and the other a hybrid type reinforced with fibers of glass-E/ fibers of curaua. It should be noted that the two laminates have the lamina of short glass-E fibers as a layer of the ageing process incidence. The specimens were removed from the composites mentioned and submitted to environmental ageing accelerated by an ageing chamber. To study the monitoring and modeling of degradation, the ageing cycles to which the lamina was exposed were: alternating cycles of UV radiation and heated steam, a cycle only of UV radiation and a cycle only of heated steam, for a period defined by norm. The laminates have already undergone only the alternating cycle of UV and heated steam. At the end of the exposure period the specimens were subjected to a structural stability assessment by means of the developed measurement of thickness variation technique (MTVT) and the measurement of mass variation technique (MMVT). Then they were subjected to the mechanical tests of uniaxial tension for the lamina and all the laminates, besides the bending test on three points for the laminates. This study was followed by characterization of the fracture and the surface degradation. Finally, a model was developed for the composites called Ageing Zone Diagram (AZD) for monitoring and predicting the tensile strength after the ageing processes. From the results it was observed that the process of degradation occurs Abstract Raimundo Nonato Barbosa Felipe xiv differently for each composite studied, although all were affected in certain way and that the most aggressive ageing process was that of UV radiation, and that the hybrid laminated fibers of glass-E/curaua composite was most affected in its mechanical properties
A aplica??o dos materiais comp?sitos e em particular os pl?sticos refor?ados por fibras (PRF) tem conquistado espa?o, gradativamente, dos materiais ditos convencionais, por?m desafios t?m sido colocados quando sua aplica??o ocorre em equipamentos e estruturas mec?nicas que ficar?o expostos a condi??es ambientais adversas, principalmente quando se tem a influ?ncia da degrada??o ambiental do tipo temperatura, radia??o UV e umidade, no desempenho mec?nico dessas estruturas, ocasionando danos estruturais irrevers?veis tais como: perda de estabilidade dimensional, degrada??o interfacial, perda de massa, perda das propriedades estruturais e altera??es no mecanismo de dano. Neste contexto a presente tese tem como objetivo o desenvolvimento de um processo de monitoramento e modelagem da degrada??o estrutural, e o estudo das propriedades f?sicas e mec?nicas, em PRF quando em presen?a de condi??es ambientais adversas (envelhecimento). O mecanismo de envelhecimento ? caracterizado por condi??es ambientais controladas de vapor aquecido e de radia??o ultravioleta. Para a pesquisa foi desenvolvido tr?s comp?sitos polim?ricos, o primeiro uma l?mina de resina poli?ster refor?ado com manta de fibras curtas de vidro-E (representando a camada exposta ao envelhecimento) e dois laminados, ambos de sete camadas de refor?o, sendo um constitu?do s? com manta de fibras curtas de vidro-E, e o outro do tipo h?brido refor?ado com fibras de vidro-E/fibras de curau?. Ressalta-se que os dois laminados t?m a l?mina de fibras curtas de vidro-E como camada de incid?ncia do processo de envelhecimento. Os corpos de provas (CP s) foram retirados dos comp?sitos citados e submetidos ao envelhecimento ambiental acelerado atrav?s da c?mara de envelhecimento. Para o estudo do monitoramento e modelagem da degrada??o, os ciclos de envelhecimento a que foram expostos ? l?mina foram: ciclos alternados de radia??o UV e vapor aquecido, ciclo somente de radia??o UV e o ciclo somente de vapor aquecido, por um per?odo definido em norma. J? os laminados foram submetidos a apenas ao ciclo alternado de UV e vapor aquecido. Ao t?rmino do per?odo de exposi??o os CP s foram submetidos ? avalia??o da estabilidade estrutural mediante a t?cnica desenvolvida de medi??o de varia??o de espessura (TMVE) e a t?cnica de media??o de varia??o de massa (TMVM). Em seguida os mesmos foram submetidos aos ensaios mec?nicos de tra??o uniaxial para a l?mina e todos os laminados, al?m do ensaio de flex?o em tr?s pontos para os laminados. Esse estudo foi seguido da caracteriza??o da fratura e da degrada??o superficial. Por fim, foi desenvolvido um modelo para os Resumo Raimundo Nonato Barbosa Felipe xii comp?sitos denominado de Diagrama da Zona de Envelhecimento (DZE) para o monitoramento e predi??o da resist?ncia mec?nica ? tra??o ap?s os processos de envelhecimento. Ao t?rmino das an?lises foi observado que o processo de degrada??o se d? de forma diferente para cada comp?sito pesquisado, no entanto todos foram afetados, o processo de envelhecimento mais agressivo foi o de radia??o UV, e que o comp?sito que foi mais afetado em suas propriedades mec?nicas foi o laminado h?brido de fibras de vidro-E/curau?
Rabassa, Bonet Montserrat. "Efecte de la ingesta de dietes riques en polifenols sobre l’envelliment. Associacions amb el deteriorament físic i cognitiu, fragilitat i mortalitat total en l'estudi InCHIANTI = Effect of polyphenol-rich diet intake on aging. Association with physical and cognitive decline, frailty and total mortality within the InCHIANTI cohort." Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/359655.
The aim of this PhD thesis is to investigate if the intake of rich diets in polyphenols may have a protective effect in the prevention of physical and cognitive decline, frailty and total mortality among the participants aged 65 years or more within the InCHIANTI study, an Italian cohort study with 12 years of follow-up. To achieve this goal, the dietary intake of total polyphenols and resveratrol was estimated using a validated food frequency questionnaire and an ad hoc database of food composition on polyphenols, created from the two only databases available in the literature: USDA and Phenol-Explorer databases. The intake of total polyphenols and resveratrol was 555.2 mg/d and 0.5 mg/d, respectively. Coffee, apples, red wine and oranges were the most important food sources of total polyphenols. In addition, red wine was the main dietary source of resveratrol. Also, we studied the presence of these bioactive compounds in urine as a reflection of their bioavailability in humans. In particular, the urinary concentration of total polyphenols and resveratrol was determined by Folin-Ciocalteu colorimetric and mass spectrometry methods, as biomarkers of the dietary of total polyphenols and resveratrol, respectively. Results showed that the total urinary polyphenols expressed by 24-h volume is a better biomarker of total dietary polyphenol than by urinary creatinine normalization. The highest tertile of total urinary polyphenols was inversely associated with the risk of cognitive and physical decline, frailty and total mortality, in comparison with the lowest tertile. However, no association with total dietary polyphenols was observed. Additionally, habitual dietary exposure of resveratrol was associated with a lower risk of developing frailty over a follow-up of three years by a combination of both measures (diet and biomarker), as well as, individually. In conclusion, the results of this PhD thesis suggest a protective effect of polyphenol-rich diet, using a biomarker of total dietary polyphenols (the total urinary polyphenols expressed by 24-h urine), against cognitive and physical decline, frailty and all-cause mortality in older persons. In addition, it demonstrates the importance of assessing dietary polyphenol exposure, whenever is possible using nutritional biomarkers and not only using self-reported questionnaires.
Baron, Stéphanie. "Insulino-résistance et vieillissement cardiovasculaire : un traitement chronique par le resvératrol peut-il les améliorer ?" Phd thesis, Université René Descartes - Paris V, 2013. http://tel.archives-ouvertes.fr/tel-01002731.
Chen, Sheng-Long, and 陳勝龍. "The relationship between protein oxidation and seed aging in rice." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/13771192704902485912.
國立中興大學
農藝學研究所
86
Several oxidative systems could generate reactive oxygen species and c atalyze protein oxidation in living organisms. After oxidative modification,ta rget proteins change their characters and become less active or highly sensiti veto proteolytic degradation. Levels of protein oxidation increase in size dur ing aging and in various pathological state. In order to test age-related prot einoxidation model is valid in plant, change of seed storage proteins status w as investigated during seed aging. The results are summarized as follows:1.Le vels of protein oxidative status could be detected by carbonyl reagents--- DN PH, FL-NHNH2, FLAD-NHNH2.2.BSA, G-6-PDH, and rice storage protein albumins, gl obulins, prolamins, and glutelins are oxidized by two metal-catalyzed oxidat ion systems ascorbate/ FeCl3 and FeSO4/FeCl3 in vitro. The accumulation of ox idized protein depends on the concentration of catalyzer and reaction time.Ca rbonyl contents in rice storage protein oxidized by MCO system in vitro are globulins(28 nmol/mg protein) >glutelins(22 nmol/mg protein)>albumins(14 nmol /mg protein)>prolamins(7~9 nmol/mg protein).3.Seed stored at ambient or 10℃ c ondition for more than six months resulted in a marked decline in germination and extarctable storage proteins. There was accompanied by an evident increa se in oxidized protein levels especially for albumin. Low temperature could r educe oxidized protein accumulation during storage.4.Intact seed, brown riec, milled rice, rice bran and milled rice flour stored at ambient or aging(45℃, 75% RH) condition for six months showed that storage proteins albumins,globu lins and glutelins were oxidized more rapidly in aging condition than ambien t. The speeds of protein oxidation were milled rice flour >rice bran>milled r ice>brown rice>intact seed.5.There are not any correlation between oxidized pr oteins and germination percentage in rice seeds druing storage.
Yen, Hsin Mu, and 顏信沐. "Physiological studies on seed aging of rice ( Oryza sativa L.)." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/87381643921290946280.
Lo, Yen-Yu, and 羅彦瑜. "Rice Spirits Brewing and Effects of Acceleration Aging on Its Quality." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/10788328145771395724.
國立中興大學
食品科學系
93
Rice-spirit plays a very important role in Chinese cooked food especially in Taiwan. Since the drinks market opens, the private breweries were established .The market competition were fierce. In this study, Taiwanese rice-spirit made by uncooked materials and effects of acceleration aging; Helps to shorten the making time and quality improvement are focused. The results obtained are as follow. 1. Starter A3 produced most reducing sugars just in two days. However, the result of reducing sugars production of other starters was far less then starter A3. 2. The ethanol concentration of starter A3 is 14% after 4 days. And the ethanol concentration of starter A1, A2, A5, A6 is getting increasing slowly. Starter A4 produced trace ethanol. This shows it is not suitable to be the starter of raw rice wine. 3. Ethanol concentration of rice-spirit decrease during treated by electrostatic field induced device and Ultrasonic machine. 4. Rice-spirit treated by electrostatic field induced device and Ultrasonic machine that major flavor components of are ethyl octanoate、ethyl nonanoate and ethyl caprate concentration higher than treated by nothing. 5. The sensory evaluation showed that rice-spirit treated by electrostatic field induced device and Ultrasonic machine having obvious improvement. Acceleration aging method of rice-spirit can shorten aging time and raise the quality.
Kuroyanagi, Toshiyuki. "Senescence of wheat and rice under three temperature regimes." 1985. http://hdl.handle.net/2097/27478.
Yang, Siao-Han, and 楊曉涵. "Effects of aging time and ultrasonic treatment on the quality of coffee liqueur made of different rice cultivar wines as base." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/kd4ezm.
國立宜蘭大學
園藝學系碩士班
103
The present study used distilled rice wine from japonica (‘GS-145’, ‘TN-71’ , ‘TY-3’, ‘TG-9’, ‘TG-16’), indica (‘TC-10’), Glutinou (‘TC-70’) and indica Glutinou (‘TC-1’ , ‘TC-2’) rice as alcoholic base for making coffee liqueur. Medium roast coffee powder was immersed in distilled rice wine for 5 weeks. Aging of coffee liqueur was conducted by normal aging (0,30,60,90,120,150,180 days at 25℃) and microwave aging (0,2,4,6 hrs). n-Propylalcohol,butyl alcohol, isoamyl alcohol, ethyl hexanoate, ethyl lactate and 2-phenylethanol are main volatile compounds in rice wine. We found that indica ‘TC-10’ has the highest content of volatile material which was chosen as alcoholic base for making coffee liqueur. Butyl alcohol, isoamyl alcohol, ethyl hexanoate, ethyl lactate and furfuryl alcohol content in the coffee liqueur increased with the time of aging increased but 2-phenylethanol content decreased with the time of aging increased. n-Propylalcohol content increased at the beginning of aging then descended. Indica ‘TC-10’ with normal aging 180 days and microwave aging 6 hours showed the most acceptable flavor among all samples. The coffee liqueur made of indica ‘TC-10’ rice wine as alcoholic base has the lowest caffeine content. The caffeine content of coffee liqueur increased with the time of aging increased. The results show that ‘TY-3’ and ‘TG-10’ have the highest sensory scores of aroma and tast. Sensory quality of coffee liqueur increased with the time of aging increased, while ‘TG-10’ has the highest score. Microwave aging for 6 hours and normal aging for 180 days has similar volatile contents and sensory results. Microwave aging can replace normal aging to shorten the aging time.
Lai, Cheng-Hung, and 賴政宏. "Acceleration of Aging by High Voltage Electrostatic Field and Detection of Molasses Alcohol Adulteration by SNIF-NMR for Taiwanese Rice Spirits." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/80897481266007058597.
大葉大學
生物產業科技學系
102
Taiwanese rice-spirits were treated by a designed adjustable parallel high-voltage electrostatic field (AP-HVEF) to investigate the acceleration effect on aging. On the other hand, the ratios of edible alcohol blended in rice spirits were detected by 2H nuclear magnetic resonance (SNIF-NMR) and isotope ratio mass spectrometer (IRMS). Experiments were divided into three parts and the results obtained were as follows. 1. Part I: Three model spirits were prepared by individually adding acetic acid, caproic acid, and lactic acid with a concentration of 20,000 ppm in 50% edible alcohol. The concentrations ethyl acetate, ethyl caproate, and ethyl lactate in the model spirits set at room temperature for 20 hr increased from initial 66, 12, and 19 ppm to 601, 243, and 328 ppm, respectively. While contrast to the control, the three esters increased 23.8%, 26.3%, 25.9% (600 kV/m) and 31.1%, 33.7%, 32.6% (900 kV/m) for that of treated by AP-HVEF. Unfortunately, extending treatment time to 20 days, the increase rate lowered to 17.1%, 7.8%, and 5.3%, respectively, for that of 900 kV/m. No obvious effect was shown for treatments of 300 kV/m and 600 kV/m. This indicated that time is probably primary factor on aging of spirit. 2. Part II: The aging effect of AP-HVEF on rice spirits blended with 1,000 ppm acetic acid and lactic acid was investigated. Ethyl acetate and ethyl lactate naturally increased to 57 and 23 ppm from initial 41 and 8 ppm for 40% rice spirits. Both esters increased due to AP-HVEF treatment with increasing field strength or extending time. Rice spirits treated at 900 kV/m for 7 days, showed 101 ppm ethyl acetate and 50 ppm ethyl lactate, while from initial 58 and 10 ppm to 163 and 132 ppm, respectively, for that of blended with acids. According to sensory test, the panel thought that AP-HVEF treatment at 900 kV/m obviously affected quality of rice spirits. 3. Part III: Five pure rice spirits labeled as TK-8, TK-9, TCS-10, TN-11 and TN 71 were made from rice varieties. Imitate rice spirits were made by adulterating molasses-spirit (MS) with various ratios to pure rice spirits. SNIF-NMR and IRMS were used to detect the added ratios. Significant difference in (D/H)I for SNIF-NMR index was observed. The (D/H)I linearly (R2 > 0.96) increased with addition of MS in TK-8, TK-9, TCS-10, TN-11 and TN-71. Test results demonstrated that TN-71 shows sensitive detectable limit which mixed molasses-spirit in rice-spirits is 3.62 %, and TK-8, TK-9, TCS-10 and TN-11 were shown the ranging from 8.20 to 11.73 %. Of the IRMS indices, TK-8, TK-9, TCS-10, TN-11 and TN-71.shown the 13C/12C ratio, δ13C = -27.4 to -28.9‰, and MS δ13C = -11.2‰. Though 13C/12C ratios increased with adding MS, it was not available as the index to distinguish how much MS is adulterated as SNIF-NMR analysis due to the low correlation of them.
HSU, SHIH-PEI, and 徐詩佩. "The Relationship between Senior Citizens’ Demographic Variables and Successful Aging: a Case Study of the Old Farmers Planting Rice in Chishang Township." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/ebku7h.
弘光科技大學
老人福利與長期照顧事業研究所
107
ABSTRACT Rice is the main grain Taiwanese eat, and Chishang Rice is nationally well-known. Chishang is a place of warm hospitality and suitable for retirement life. Growing old is the path everyone must go through, and the aged society has dawned on us in Taiwan. How to achieve in a successful aging stage is the issue we all must pay attention to. In past literature there were no records of relations of elder farmers participating in growing Chishang Rice and successful aging. The researcher is a Chishang local, and that is the reason for the initial interest of this research. This research aims to: 1. explore the current situation of elder farmers participating in rice planting and farming activities of Chishang Rice; 2. analyzing the degree of successful aging of elder farmers who participated in the rice planting; 3. exploring the key factors affecting the successful ageing in terms of the participation of Chishang Rice planting. This study takes elder farmers over 65 years old planting Chishang Rice in Chishang Township as research subjects. The research utilized survey research method and received 117 valid questionnaires. It then chose the purposive sampling method to study the correlation between different population variables and the participation of farming in successful aging. The statistical methods include narrative statistics, independent sample t-test, and single-factor variance analysis. The research results are: 1. the old farmers are mainly male, and participate in farming activities every day in order to increase the source of family income. 2. Living and working in the town of rice allows the elder farmers to find self-esteem and achieve the current status of successful aging. 3. There is a negative correlation between the "residence status" and the successful aging in the population change of the old farmers growing Chishang Rice. Key Words: agriculture, successful aging, older farmers
Tsai, Tsung-Jung, and 蔡宗容. "Aging Effect on Multi-step Transformation Behavior in Ni-rich TiNi shape memory alloys." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/02604647652182029594.
國立臺灣大學
材料科學與工程學研究所
95
Ti49.2Ni50.8 and Ti48.7Ni51.3 shape memory alloys (SMAs) melt, homogenized and aged without any hot/cold rolling have grain size >50μm. The distribution of Ti3Ni4 precipitates directly affects the transformation behavior of these alloys. After 350℃ and 400℃ aging, Ti49.2Ni50.8 shows a normal three-step transformation. At 450℃×6hr, the nucleation rate of Ti3Ni4 is so high that the supersaturated Ni atoms in the grain center can not diffuse such long distance to grain boundaries and thus, there are three distinct regions resulted in the grain, i.e., regions I, II and III. Four-step transformation of B2Ⅰ,Ⅱ,Ⅲ→RⅠ,Ⅱ,Ⅲ, RⅠ,Ⅲ→B19’Ⅰ,Ⅲ, B2→B19’(no ppt) and RⅡ→B19’Ⅱ is induced from these regions. Experiment results show that the aging temperature decides the diffusion rate of Ni atoms, the growth rate and the distribution of Ti3Ni4 precipitates in the grain. The Ti3Ni4 precipitation rate has its maximum at around 450℃ aging, but can hardly be observed at 350℃ and 650℃ aging. According to SEM observations, after longer aging time, the precipitates distribute more homogeneously in the grain and the multi-step transformation no longer exists. For Ti48.7Ni51.3 alloys, its higher Ni supersaturation causes the Ti3Ni4 nucleation having higher driving force and causes the precipitation rates being almost the same at grain boundaries and grain interior. This feature results in a simple B2→R→B19’ two-step transformation in aged Ti48.7Ni51.3 SMA. The multi-step transformation behavior of Ti49Ni41Cu10 SMA is also investigated in this study.
"4D Microstructural Characterization of Electromigration and Thermal Aging Damage in Tin-Rich Solder Joints." Doctoral diss., 2019. http://hdl.handle.net/2286/R.I.54978.
Dissertation/Thesis
Doctoral Dissertation Materials Science and Engineering 2019
Wu, Yi-Zhen, and 吳翊禎. "The Changes of the Rich-Club Organization in Brain White Matter Networks in Normal Aging." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/22906319230071598592.
國立陽明大學
腦科學研究所
104
Population aging is growing worldwide, and the related studies become more and more important. The physiological and cognitive functions usually decline with normal aging. The white matter (WM) degeneration with aging may affect the functional integration of brain connectivity and lead to cognitive alteration. Studies using diffusion magnetic resonance (MR) imaging and network analysis have demonstrated the rich-club organization as a core-subnetwork for communication in brain WM network, characterized by densely connecting hubs. However, the topological properties of rich-club organization may depend on the choice of parcellation for gray matter including the resolution and different method (volume-base or surface-base) of parcellation. Moreover, the connectivity changes in the rich-club organization of WM network during aging remains largely unknown. In this thesis, we proposed a random parcellation to build a high resolution brain network which provide more detail information of fiber connections and cortical structure. We further applied this parcellation to study the alteration of rich-club organization in elderly. The studies in this thesis is twofold. In the first part, we proposed a surface-based random parcellation for anatomical network re-construction to examine the rich-club structures and tested the robustness of the rich-club organization. The MR data were acquired from ten healthy adults (age: 25 ± 4 years) who underwent MR scan twice within two weeks. The cortical parcellation was performed by a region growing-based algorithm for the cortical surface 100 times randomly to subdivide a predefined atlas to 480~500 regions once a time. To assess the topology of the brain network, we re-constructed the whole brain WM network with the constrained spherical deconvolution (CSD) tractography and calculated the rich-club coefficient for individual subject to define the rich-club organization. We overlapped the rich-club regions for 100 networks to evaluate the regions involved in the rich-club organization across random-parcellations. For quantification, the averaged intraclass correlation coefficient (ICC) between two session was calculated to access the reproducibility. The second part is to explore the rich-club organization changes in elderly by using the random parcellation to reconstruct brain network. Diffusion and T1-weighted imaging data from five hundred sixty-seven healthy elderly (aged from 51 to 88) were recruited. We re-constructed the whole brain WM network with the constrained spherical deconvolution (CSD) tractography, and calculated individual rich-club coefficient and its area under curve (AUC) as a presentation of connectivity of rich-club organization. Moreover, to study the intra-/inter- connectivity of rich-club organization, we classified connections to three different categories including rich-club (RC), feeder (FC) and local (LC) connections. We calculated the mean strength in each type of connections for each threshold k and the area under curve of resulting strength curve as a quantification of connectivity strength. We performed the Pearson’s correlation to analyze the relationship between the connectivity and the strength of WM network with age and physiological scores. The results of first part showed that the ICC between two session is 0.75, indicating mid to excellent reproducibility. The regions involved in rich-club organization are consistent between two session, including transverse temporal cortex, insula and precuneus. The results of second part showed that global metrics of strength and density of whole brain connections were decreased with age. The area under curve of the strength curve in three types of connection were significantly negative correlated with age, especially the local connection (LC). However, the AUC of rich-club coefficient correlated positively with age, indicating that the connectivity in rich-club organization stay stable during aging. The AUC of both normalized rich-club coefficient and strength curve showed no significant correlation with cognitive scores except Taiwan Geriatric Depression Scale (TGDS). There were significantly positive correlations between TGDS score and both the AUC of strength curve of rich-club connection and feeder connection. In addition, the AUC of both normalized rich-club coefficient and strength curve exhibited significantly negative correlation with physical indices including weight, height and muscle strength indices. These results suggest that the alteration of rich-club connection due to white matter loss may indirectly affect the body states in elderly. In summary, the rich-club organization showed relatively high reproducibility using surface-base random parcellation. During normal aging, the rich-club organization may stay robust and unchanged, but the strength of connections declined at the local connections, indicating the structural degeneration may occur disproportionally in different location of brain. Moreover, the changes of connections in rich-club were not associated with cognition but body-related indices. The cognition of the elderly may not be affected due to the preserved architecture of the core regions, but the decreasing of connections may indirectly affect the physical states. However, the different factors and mechanism involving in the alteration of the body states in aging needs to be addressed. The mechanism of how strength between the rich-club regions affect body and behavioral states needs to be further studied. These results provide the alteration of the connections between important regions during aging as a reference to study the changes of structural network during late life-span or in the aged-related diseases.
Barrie, Fatmata Haja. "Effects of Constrained Aging on the Shape Memory Response of Nickel Rich Niti Shape Memory Alloys." 2009. http://hdl.handle.net/1969.1/ETD-TAMU-2009-12-7308.
CHEN, WEI-ZHONG, and 陳威中. "Case Study of Aging/Deteriorating Effects on Structural Integrity of Mid-rise RC Building in Central Taiwan." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/bvj4jt.
朝陽科技大學
營建工程系
107
Due to Taiwan is situated along the seismic belt and reports frequent seismic activities, and there are also lots of old buildings constructed before the regulation of Earthquake resistance has been amended, it caused many doubts about the use of old or aging of buildings. Whether the seismic performance of these buildings is up to the standard of current regulation and whether there are appropriate earthquake-resistant reinforcement for buildings have become a big issue. In order to help quickly understand the future seismic performance evaluation, an eight-storied building has been chose for this study, then the deterioration parameters are simulated by ETABS Pushover Analysis. The main parameter are the percentage of aging column and the number of aging layers. To understand the impact on the seismic performance of the building, the researcher use computing and graphical analysis. The research shows that the impact on the seismic performance of the structure is not obvious when the percentage of aging column is less than 25%. However, buildings would not be able to resist when the percentage is higher than 25%. Furthermore, for the case of eight-storied building, it has little impact on seismic performance of building if the aging layers are less than two. When the deterioration is slight (〖f'〗_c180), the decrease of the seismic performance of the multi-story structure is not directly proportional to the increase of the number of aging floors. Instead, when the deterioration is severe (〖f'〗_c140), the seismic resistance decreases obviously as the number of floors increases.
Iannotta, Lucia. "Brain-Derived Neurotrophic Factor influences cholesterol trafficking between astrocytes and neurons - Effects of Aging or a Fructose-rich diet on neurotrophin levels and markers of brain functioning." Tesi di dottorato, 2018. http://www.fedoa.unina.it/12568/1/PhD_THESIS_LUCIA_IANNOTTA.pdf.