نتایج جستجو برای: mechanical activated

تعداد نتایج: 454071  

2016
Melissa Checky Kevin Frankel Denise Goddard Erik Johnson J. Christopher Thomas Maria Zelinsky Cassidy Javner

A passive visual end of service life indicator (ESLI) for certain organic vapors has been attached to the inside wall of an organic vapor respirator cartridge. The opposite side of the ESLI touches activated carbon inside the cartridge. During use, organic vapors moving through the cartridge adsorb into both the carbon and the ESLI. The cartridge body is clear so that when vapor concentrations ...

Journal: :AIHAJ : a journal for the science of occupational and environmental health and safety 2001
E S Moyer S J Smith G O Wood

This article reviews efforts by researchers and organizations around the world to identify chemicals as substitutes for carbon tetrachloride in measuring activated carbon activity (adsorption capacity) or organic vapor air-purifying respirator cartridge (or other packed carbon bed) breakthrough times. Such measurements usually are done to determine if a minimum performance standard is met. Diff...

Journal: :Arteriosclerosis, thrombosis, and vascular biology 2007
Jizhong Cheng Jie Du

OBJECTIVE Activation and proliferation of vascular smooth muscle cells (VSMCs) occur in the venous neointima of vein grafts. VSMCs in a grafted vein are subjected to mechanical stretch; our goal is to understand the essential mechanical stretch-regulated signals that influence VSMCs during neointimal formation in vein grafts. METHODS AND RESULTS In cultured vein VSMCs, mechanical stretch indu...

2016
Soo-Kyung Jun Hae-Hyoung Lee Jung-Hwan Lee

The purpose of this study was to determine mechanical properties using a compressive test with cylinder specimen (h = 6 mm and ϕ = 4 mm) as well as cytotoxicity using elutes from disk specimen (ϕ = 10 mm and h = 2 mm) against human gingival fibroblasts and oral keratinocytes with light-activated provisional resin materials (Revotek LC and Luxatemp Solar) compared to chemically activated counter...

Journal: :polyolefins journal 2015
helmut g. alt

eethylene polymerization catalysts became available in an enormous variety. the challenge in this research is to find catalysts that are able to connect ethylene molecules in such a way that not only linear chains are produced but variations like branched materials that possess very interesting mechanical properties like linear low density polyethylene (lldpe). in this contribution, three diffe...

Journal: :international journal of environmental research 0

semi-aerobic leachate is characterized by organic matter (cod, bod) which is relatively low in concentration and difficult to biodegrade. in conventional treatment systems, the low biodegradability is attributed to partial stabilization of leachate at the landfill. biological treatment of leachate in malaysia is not well established and any important data for the treatment process is not availa...

2007
P. Krejci J. Sainte-Marie M. Sorine J. M. Urquiza

We present a mathematical model describing the electro-mechanical coupling and the mechanical activity of the myofibres of the cardiac muscle and we perform the simulations for the partial differential equations describing the dynamical displacement of a onedimensional body with the resulting constitutive law. Prescribed boundary conditions describing the cardiac valves mechanisms and the arter...

2016
BING-SHU LI WEN-JUN GUO LI HONG YAO-DAN LIU CHENG LIU SHA-SHA HONG DE-BIN WU JIE MIN

Mechanical loading on pelvic supports contributes to pelvic organ prolapse (POP). However, the underlying mechanisms remain to be elucidated. Our previous study identified that mechanical strain induced oxidative stress (OS) and promoted apoptosis and senescence in pelvic support fibroblasts. The aim of the present study is to investigate the molecular signaling pathway linking mechanical force...

2013
Dechao Kong Tiansheng Zheng Ming Zhang Daode Wang Shihao Du Xiang Li Jiahu Fang Xiaojian Cao

Mechanical stress has detrimental effects on cartilaginous endplate chondrocytes due to apoptosis in vivo and in vitro. In this study, we investigated the possible apoptosis signaling pathways induced by mechanical stress in cultured rat cervical endplate chondrocytes. Static mechanical load significantly reduced cell viability in a time- and load-dependent manner, as demonstrated by the Cell C...

Journal: :Journal of The Korean Society of Agricultural Engineers 2009

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