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689 results for “Stress”
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Research ArticleOpen accessEvery word in the titleThree Dimensional Investigation of Mode I Stress Intensity Factor Variations in Crack Front Using Finite Element MethodM. M. MirsayarOverall failure may occur in many engineering structures due to the initiation and growth of cracks. Stress intensity factors are extensively used to investigate crack growth in Linear Elastic Fracture Mechanics (LEFM). In many cracked specimens, the stress singularity varies through the thickness and therefore, investigation of stress intensity factor variation in crack front and determination of its maximum value … …American Journal of Engineering and Applied Sciences, Vol. 8, Issue 1 · 26 Jan 2015 · 7,331 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleCrosstalk between Oxidative Stress Signaling and HER2 Pathway in Breast CancerVanessa Jacob Victorino, Adriano Martin Felis Aranome, Fernanda Carolina de Campos et al.About 20% of breast cancer patients overexpress the Human Epidermal growth factor Receptor-2 (HER2), also known as ErbB2. HER2-overexpression is associated with enhanced tumor malignancy and its overexpression is related to specific target therapy against breast tumors and other cancers. HER2-mediated pathways in tumor cells act on behalf of the tumor conferring aggressive characteristics. Several reports demonstrated the occurrence of … …American Journal of Immunology, Vol. 10, Issue 4 · 17 Jan 2015 · 8,038 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleThe Participation of Oxidative Stress in Breast Cancer Cells Progression and Treatment ResistancePoliana Camila Marinello, Kaliana Larissa Machado, Rubens Cecchini, Alessandra Lourenço CecchiniThis article presents a general discussion about the participation of oxidative stress in relevant points related to breast cancer progression in vitro. All of the evidences presented here are based on published papers that used breast cancer cells with different phenotype characteristics in their research. We observed that oxidative stress could modulate by several manners the tumor progression and these … …American Journal of Immunology, Vol. 10, Issue 4 · 17 Jan 2015 · 7,511 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEvaluation of the Tunnel Face Stability through a Ground Stress Analysis with a Hemispherical Geometry ApproximationPierpaolo OresteThe evaluation of the stability of the excavation face is an important aspect in the design of a tunnel. When it is not possible to ensure excavation face stability in natural conditions, it is in fact necessary to intervene with remarkably costly reinforcement operations. The analysis of the stability conditions of an excavation face can be conducted, with a certain … …American Journal of Applied Sciences, Vol. 11, Issue 12 · 8 Jan 2015 · 6,724 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleThe Role of Nf-Kappa and HDCA and Implication of Oxidative Stress in Airway Inflammation of Chronic Obstructive Pulmonary DiseaseGhada A. Abdallah, Nevine M. Abd-Elfattah, Hala M. Ghanem et al.Oxidative stress has been implicated in the pathogenesis of Chronic Obstructive Pulmonary Disease (COPD), due to its effect on proinflammatory gene transcription. Oxidants/antioxidants imbalance is responsible for disease development. The study was designed to assess oxidative stress and inflammation in COPD patients. The level of TNF-α and IL-8 in sputum and BAL were compared. NF-κB and HDAC were measured in … …American Journal of Biochemistry and Biotechnology, Vol. 10, Issue 4 · 4 Dec 2014 · 6,836 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleCOPPER STRESS ON CELLULAR CONTENTS AND FATTY ACID PROFILES IN CHLORELLA SPECIESG. Sibi, T.S. Anuraag, Geeta BafilaHigher photosynthetic efficiency and biomass production with rapid growth makes microalgae as potential candidates over other energy crops in many applications. Heavy metals influence the production of secondary metabolites and lipd content of microalgae in particular. A study was conducted using six Chlorella species under heavy metal exposure to evaluate the copper stress on biomass, cellular and lipid contents. Preliminary … …OnLine Journal of Biological Sciences, Vol. 14, Issue 3 · 20 Aug 2014 · 7,785 accessesView PDFCite
Research ArticleOpen accessEvery word in the titlePSYCHOLOGICAL INTERVENTION INCLUDING EMOTIONAL FREEDOM TECHNIQUES FOR AN ADULT WITH MOTOR VEHICLE ACCIDENT RELATED POSTTRAUMATIC STRESS DISORDER: A CASE STUDYTerri SheldonPosttraumatic Stress Disorder (PTSD) is a significant public health concern and can have long-term emotional, social and financial consequences for individuals and society. Lifetime prevalence in the general population is estimated at 8% and rates of exposure to Post-Traumatic Events (PTE) indicate approximately 50 to 65% have been exposed to at least one PTE in their lives. This indicates that … …Current Research in Psychology, Vol. 5, Issue 1 · 18 Jul 2014 · 11,329 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEFFECTS STUDY OF NIGELLA SATIVA, ITS OIL AND THEIR COMBINATION WITH VITAMIN E ON OXIDATIVE STRESS IN RATSAmr A. RezqAntioxidants or free radical scavengers are very important in protecting the living cells against any damage induced by free radicals. The effects of Nigella Sativa Extract (NSE), Nigella Sativa Oil (NSO) and Vitamin E (Vit. E) and the combination of NSE or NSO with Vit. E on potassium bromate (KBrO3)-induced oxidative stress in male rats were investigated. Forty nine Sprague … …American Journal of Applied Sciences, Vol. 11, Issue 7 · 23 Apr 2014 · 7,005 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleSTRESS; THE VULNERABILITY AND ASSOCIATION WITH DRIVING PERFORMANCEB. M.T. Shamsul, S. Khairunnisa, Y. G. Ng, M. Y. Irwan SyahSeveral factors may contribute to occurrence of road accidents which are human factors, vehicle factor, road factor and environmental factor. There has been recent evidence of a relationship between road accidents and emotional distress as well as fatigue. Monotonous and complex road environments are the road factor that relates to the internal factor within driver. The overall aim of this … …American Journal of Applied Sciences, Vol. 11, Issue 3 · 11 Jan 2014 · 7,717 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEffect of Virgin Olive Oil (Olea europea. L) on Kidney Function Impairment and Oxidative Stress Induced by Mercuric Chloride in RatsYoucef Necib, Ahlem Bahi, Sakina Zerizer et al.The study was designed to investigate the possible protective role of virgin olive oil in mercuric chloride induced renal stress, by using biochemical approaches. The effects of virgin olive oil on mercuric chloride induced oxidative and renal stress were evaluated by serum creatinine, urea and uric acid levels, kidney tissue lipid peroxidation, GSH levels, GSH-Px and GST activities. Administration of … …American Journal of Biochemistry and Biotechnology, Vol. 9, Issue 4 · 20 Dec 2013 · 16,786 accessesView PDFCite