نتایج جستجو برای: aging time

تعداد نتایج: 1980703  

Background and Objective: Aging is a natural phenomenon which can cause changes in most organs and cells. Numerous mechanisms including oxidative stress and free radical generation is involved in the progression of the aging process. Pomegranate seed oil (PSO), has different therapeutic properties including anti-oxidant and anti-inflammatory effects. In this research, the effect of PSO against ...

Elham Moslemee-Jalalvand, Jahanfard Kazemi, Nuredin Bakhtiari,

We and other studies have elucidated single molecules that can attenuate aging and extend longevity. Indeed, these molecules could prevent age-associated diseases simultaneously and probably extending healthy-life spans. In this review, we discuss recent advances, controversies, opportunities and challenges surrounding ursolic acid (UA) in relationship with aging. In this regard, UA also known ...

Journal: :International Journal of Civil Engineering 2021

Abstract The binder in hot-mix asphalt (HMA) is aged (oxidized) a short-time period during haul-and-queue the field. Since oxidative aging of complex chemical process, it difficult to define as function limited variables. When comparing same types mixes, however, mix temperature ( T ) and time t kept at will be primary source variation affecting levels mix. level not easy estimate without measu...

Journal: :علوم و تکنولوژی پلیمر 0
مجید پاکیزه محمدرضا امیدخواه رامین کریم زاده عبدالصمد زرین قلم

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Several samples of mesoporous silica were prepared via sol-gel chemistry in the presence of CTAB as template with variation of stirring intensity and aging time, ratios of CTAB/SiO2 and NH4OH/H2O in synthesis mixture. Effects of aging temperature, hydrothermal treatment and ter-Butanol addition to the synthesis mixture on the textural properties of obtained samples were also studied. Results of...

1999
J. D. Davidson J. F. Wager

A study of the aging characteristics of evaporated ZnS:Mn alternating-current thin-film electroluminescent (ACTFEL) devices is undertaken by monitoring the capacitance-voltage (C-v) characteristics at various temperatures as a function of aging time. Short-term ACTFEL aging is characterized by a rigid shift in the C-V curve to higher turn-on voltage with aging time. Additionally, the insulator ...

Groundnut seed priming was performed with an aqueous solution of gibberellic acid (GA3) (0, 50, 100, and 150 ppm for 18h) and accelerated aging (96 h) was done prior to drought stress (-0.4, -0.6, and -0.8 MPa), then recovered. Investigated traits were germination percentage, mean germination time, germination rate, vigor index, plumule length, radicle length, seedling length, malondialdehyde c...

K. Tabari, M. Amiri Siavashani, S. Eskandarion, Z. Jaberi Ansari,

  Objective: Despite the high strength of zirconia restorations, aging in the oral environment and masticatory loading may result in transformation of tetragonal to monoclinic phase and decrease their strength. Statements in this regard are controversial. This study sought to compare the flexural strength (FS) of Zirkonzahn (ZirkonZahn, Cercon, Ceramill) and Mamut (Dubai Medical Equipment LLC, ...

2014
Elizabeth Grossman

A growing body of evidence suggests that neurological function in the elderly can be affected by exposures from years earlier. In some cases, contaminants stored in the body are released over time as a function of processes such as pregnancy and aging. In others, damage may occur with no evidence of effects until old age. Clockwise from top left:

Background and purpose: Bracket debonding is a major problem during orthodontic treatment. This research aimed at studying shear bond strength (SBS) and adhesive remnant index (ARI) in two bonding systems (Assure Plus (adhesion booster) and control). Materials and methods: In this vitro trial, premolars (n=90) were divided into two groups. The brackets were bonded either with Transbond XT or A...

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