نتایج جستجو برای: aging of materials

تعداد نتایج: 21203454  

2017
M. Narayanan Nair S. Li C. Beach G. Rentfrow S. P. Suman

specific variations in sarcoplasmic proteome influence beef color. Post-mortem aging is a common practice employed by beef industry for improving beef tenderness and palatability. However, the color attributes and sarcoplasmic proteome of beef muscles undergo changes during aging. The objective of this study was to examine the changes in the sarcoplasmic proteome profile of three differentially...

Journal: :journal of dental research, dental clinics, dental prospects 0
mohammad esmaeel ebrahimi chaharom assistant professor of operative dentistry amir ahmad ajami assistant professor of operative dentistry medi abed kahnamouei associate professor of operative dentistry elmira jafari navimipour associate professor of operative dentistry pardis tehranchi post graduate student of operative dentistry vahid zand associate professor of endodontics

background and aims. the aim of this study was to evaluate the antibacterial activity of one-step self-etch adhesives on enterococcus faecalis on days 1, 7 and 14 with the use of modified direct contact test. materials and methods. the modified direct contact test was used to evaluate the antibacterial effect of adper easy one, bond force, clearfil s3 bond, futurabond m, g-bond, ibond and optib...

Journal: :Physical review letters 2006
Peter Mayer Sébastien Léonard Ludovic Berthier Juan P Garrahan Peter Sollich

In glassy materials, aging proceeds at large times via thermal activation. We show that this can lead to negative dynamical response functions and novel and well-defined violations of the fluctuation-dissipation theorem, in particular, negative fluctuation-dissipation ratios. Our analysis is based on detailed theoretical and numerical results for the activated aging regime of simple kinetically...

Journal: :Materiale Plastice 2021

Polypropylene (PP) has a wide range of applications in the automobile bumpers due to its many excellent properties. Mechanical properties PP for are investigated through an artificial accelerated aging test. The rules after different years normal use and test analyzed. correlation between natural artificially is also explored. It provides reference study polymers automotive applications. Result...

ژورنال: مواد پرانرژی 2014

In this study, the aging and deterioration mechanisms in the plastic bonded explosives (PBXs) and their components as well as standard methods for their evaluating are presented. Also, the techniques developed for the prediction of chemical lifetime and service life of PBXs will be reviewed and analyzed. These methods cite the lifetime prediction methods based on weight/energy loss by thermal a...

Journal: :علوم گیاهان زراعی ایران 0
اعظم زمانی سید احمد سادات نوری رضا توکل افشاری حمید ایران نژاد غلام علی اکبری افشین توکلی

an experiment was conducted to determine the aging mechanism in safflower seed using natural aging treatment (storing seed at room temperature for six years) and accelerated aging ( incubating the seed at 41?c and close to 100% relative humidity for 4 ,8 and 12 days). the results indicated that both natural and accelerated aging reduced germination percentage, seed vigor and activity of catalas...

Journal: :international journal of civil engineering 0
n. shariatmadari department of civil eng., iran university of science and technology a.h. sadeghpour department of civil eng., iran university of science and technology m. mokhtari department of civil eng., iran university of science and technology

the physical properties of the municipal solid waste (msw) in kahrizak landfill (tehran, iran) and its changes due to aging were investigated in this research. a study of the components of the fresh msw in this landfill showed that more than 60% of it was made from the wastes of foods, fruits, vegetables and organic materials. next to that, paper/cardboard and plastics, with contributions of 14...

Vascular aging plays an important role in the mortality of the elderly, but vascular aging can be dependent on other factors such as diseases. Various diseases such as Alzheimer, diabetes, thalassemia, and other diseases affect the mechanisms of vascular aging. It will harm the recovery process of these patients. There are methods for measuring vascular aging such as instrumental measurements a...

2003

Buildings are being erected with completely new materials and components. They have lighter, stronger and fatigue resistant materials that perform better and last longer. The buildings show few signs of ageing or deterioration and suffer less time out of service for repairs and maintenance. Because they are more efficient in terms of insulation, waste products and heating, buildings consume les...

2008
Michael Ambrose Dhammika DeSilva

Water authorities around the world are faced with the problem of ageing distribution networks and often only limited historical data on which to base a sound long term, cost efficient replacement policy. The LICAN approach to whole of life costing is introduced and a hypothetical case study is used to demonstrate the importance of such an approach. A selection of pipe networks utilizing differe...

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