نتایج جستجو برای: accelerated heat aging

تعداد نتایج: 361296  

2012
R. Farhadi M. R. Rahmani M. Sadeghi

The effect of accelerated aging (AA) was studied in Basil (Ociumum basilicm L.) seeds. The objective of this research was to evaluate Effect of seed ageing on germination of Basil Seeds in Roodan University in year 2012. experiment was CRD design with 3 replicate. The seeds were artificially aged at 45°C and 100% relative humidity for 24, 48, 72, and 96 hours. Results indicated germination perc...

Journal: :journal of computational and applied research in mechanial engineering - jcarme 0
m. jooybari school of mechanical engineering, college of engineering, university of tehran, tehran, iran j. shahbazi karami faculty of mechanical engineering, shahid rajaee teacher training university, tehran, iran m. sheikhi faculty of mechanical engineering, shahid rajaee teacher training university, tehran, iran

in the present study, mechanical properties and low cycle fatigue behavior of a solid-solutionized aa6061 aluminum alloy produced by equal channel angular pressing (ecap) process were investigated. the grain refinement after two passes of ecap significantly increased the yield stress and ultimate tensile stress and decreased the ductility of the alloy. however, the improvement of low cycle fati...

2015
Jiang Zhu Jie Zhang Hong Li Tian-Yang Wang Chuan-Xin Zhang Ming-Jiu Luo Jing-He Tan

Although previous studies have suggested that cumulus cells (CCs) accelerate oocyte aging by secreting soluble and heat-sensitive paracrine factors, the factors involved are not well characterized. Because Fas-mediated apoptosis represents a major pathway in induction of apoptosis in various cells, we proposed that CCs facilitate oocyte aging by releasing soluble Fas ligand (sFasL). In this stu...

2012
Marília Shibata Cileide Maria Medeiros Coelho Luciana Magda de Oliveira Cristhyane Garcia

This research was aimed at studying effects of storage and accelerated aging on germination and profile of storage proteins in Handroanthus albus seeds. These were stored into a cold chamber (± 8 oC; RH ± 40%) and after periods of 0, 3, 6, 9, and 12 months of storage, were subjected to accelerated aging for 0, 24, 48, 72, and 96 hours. Relationships between germination and proteins profile were...

Journal: :Energies 2021

In this article, both numerical and experimental investigations were carried out on the durability of hemp concrete. For this, an accelerated aging process was performed using cycles immersion, freezing drying. Then, campaign enabled to determine heat mass transfer properties, as well microstructure for aged reference materials. Observations a digital microscope showed appearance cracks at inte...

2011
Mikhail V. Blagosklonny

A recent discovery that rapamycin suppresses a pro-senescent phenotype in progeric cells not only suggests a non-toxic therapy for progeria but also implies its similarity with normal aging. For one, rapamycin is also known to suppress aging of regular human cells. Here I discuss four potential scenarios, comparing progeria with both normal and accelerated aging. This reveals further indication...

Journal: :مهندسی متالورژی و مواد 0
احمد رحیمی شمس الدین میردامادی سیدحسین رضوی سید مهدی عباسی

the purpose of this study was to investigate the effect of heat treatment including solution treatment and aging on the microstructure of cast nickel-based in100 superalloy including size, volume fraction and morphology of primary γ' and different kinds of carbides. for this purpose, different solution heat treatment cycles and a constant aging cycle were implemented on cast ingot samples and t...

The synthetic polymers are widely used as adhesives, consolidants and protective coatings in the conservation of historic relics. Although, compared to the natural polymers and adhesives, these materials present a better resistance against the microorganisms, most synthetic polymers remain appropriate sources of Carbon and energy for the growth of microorganism; in addition, the relics consolid...

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