نتایج جستجو برای: damage zone

تعداد نتایج: 334120  

Journal: :Folia morphologica 2016
D Solomon J Sharp D Boydstun C Persaud J Pfeiffer A Olinger

BACKGROUND Thoracentesis and video-assisted thoracic surgery procedures can result in haemorrhage as a consequence of severing the collateral branches of the posterior intercostal artery. These branches have been shown to be most common in the 5th intercostal space (ICS). Tortuosity has been shown to be especially prevalent nearer to midline. A group of investigators have recommended the 4th an...

Journal: :Cerebral cortex 2005
Roopashree Narasimhaiah Alexander Tuchman Stanley L Lin Janice R Naegele

DNA repair plays a critical, but imprecisely defined role in neuronal survival during cortical neurogenesis. We examined cortical development in mice deficient for the DNA end-joining protein, Ku70. At gestational day 14.5, corresponding to the peak of neurogenesis, the Ku70(-/-) embryonic cerebral cortex displayed 25- to 30-fold more cell death than heterozygous littermates, as judged by DNA b...

2002
R. S. Piascik J. A. Newman

Fatigue crack growth (FCG) research conducted in the near threshold regime has identified a room temperature creep crack growth damage mechanism for a fine grain powder metallurgy (PM) aluminum alloy (8009). At very low ∆K, an abrupt acceleration in room temperature FCG rate occurs at high stress ratio (R = Kmin/Kmax). The near threshold accelerated FCG rates are exacerbated by increased levels...

2015
Ananth Kidambi Manish Motwani Akhlaque Uddin David P Ripley Adam K McDiarmid Peter P Swoboda David A Broadbent Tarique A Musa Bara Erhayiem Josh Leader John P Greenwood Sven Plein

Background The transmural extent of myocardial infarction (MI) as assessed by late gadolinium enhancement (LGE) CMR predicts functional recovery. In acute MI (AMI), myocardial edema and effects of reperfusion therapy reduce the predictive accuracy of LGE. LGE assesses tissue dichotomously as “viable” or “non-viable”, but does not consider the severity of tissue damage within the hyperenhanced i...

Journal: :International Journal for Numerical and Analytical Methods in Geomechanics 2021

In rock engineering, damage evolution upon loading imposes significant impacts on the stiffness of mass and its deformation characteristics. order to investigate influence both plasticity cavity expansion, a plastic solution is derived for undrained spherical expansion in medium. For consideration plasticity-damage, Modified Cam-Clay (MCC) model selected as driver, criterion adopted coupled wit...

2012
Kimberly J. Christie Ann M. Turnley

Neural stem/precursor cells in the adult brain reside in the subventricular zone (SVZ) of the lateral ventricles and the subgranular zone (SGZ) of the dentate gyrus in the hippocampus. These cells primarily generate neuroblasts that normally migrate to the olfactory bulb (OB) and the dentate granule cell layer respectively. Following brain damage, such as traumatic brain injury, ischemic stroke...

2012
Emily Elizabeth Coates John P. Fisher Ian White Silvia Muro Elizabeth Coates Doris Walsh

Title of Document: ENGINEERING ZONAL CARTILAGE THROUGH UTILIZATION OF A MESENCHYMAL STEM CELL POPULATION Emily Elizabeth Coates, Doctor of Philosophy, 2012 Directed By: Associate Professor John P. Fisher Fischell Department of Bioengineering Articular cartilage has a limited ability to repair itself after damage due to injury or disease. Regenerative therapies using chondrocytes, the primary ca...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند - دانشکده علوم 1392

سازند آسماری مهم ترین سنگ مخزن نفتی مخازن زاگرس، بویژه در فرو افتادگی دزفول می باشد. این سازند در میدان کوپال عمدتاً از رخساره های سنگ آهکی دانه غالب بایوکلستی (فرامینیفری- جلبکی) تشکیل شده است. لیتولوژی های موجود شامل سنگ آهک، سنگ آهک دولومیتی، سنگ آهک حاوی تبخیری ها، دولومیت و تبخیری ها (مثل انیدریت و ژیپس) هستند. تحلیل های رخساره ای در چاه های شماره 6 ،40 و 4 این میدان، نشان می دهد که سازند آ...

2016
Chenhui Wei Wancheng Zhu Shikuo Chen Pathegama Gamage Ranjith

This paper proposes a coupled thermal-hydrological-mechanical damage (THMD) model for the failure process of rock, in which coupling effects such as thermally induced rock deformation, water flow-induced thermal convection, and rock deformation-induced water flow are considered. The damage is considered to be the key factor that controls the THM coupling process and the heterogeneity of rock is...

2018
Bing Zhao Qiao-Juan Shi Zhen-Zhong Zhang Shu-Yan Wang Xi Wang Hao Wang

Ischemic stroke is a highly complex pathological process that is divided into acute, subacute and chronic phases. Paeonol is a biologically active natural product with a variety of pharmacological effects, including those on neuronal activity. However, the effects of paeonol on subacute/chronic ischemic stroke have remained to be elucidated. The present study was designed to investigate the eff...

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