the relationship between qt dispersion and myocardial ischemia is still controversial. therefore, we aimed to investigate the relationship between qtd and the severity and extent of myocardial ischemia. in this cross-sectional study, 141 patients having symptoms of cad who referred to our medical center during 2009-2010, and were examined with myocardial isotope scan and ecg, were enrolled. bas...

background and aims. the aim of this study was to determine the stress patterns within an implant and the effect of different types of connections on load transfer. materials and methods. three different types of implant-abutment connections were selected for this study. sample a: 1.5-mm deep internal hex corresponding to a lead-in bevel; sample b: a tri-channel internal connection; and sample ...

background managing and coping with occupational stress as a recognized problem in the modern era, is vital and important. nursing is by nature a stressful occupation. continuous and long-term stress can result in physical, psychological, and behavioral problems in nurses. we aimed to assess occupational stress in nurses working in surgical, internal and psychiatric wards in teaching hospitals ...

introduction: job stress can result from an imbalance between job demands and the abilities to cope them. stress can affect individuals and lead to job dissatisfaction. this study was conducted to assess the influence of different job stress dimensions on job satisfaction in workers of a refinery control room located at the south of iran. materials & methods: in this cross sectional study all 1...

the aim of this study was to investigate the relationship between job stress with personality characteristics and organizational commitment. this study is descriptive and correlational. the study population comprised all nurses in 13-aban hospital of ghods city. the sample group consisted of 120 nurses who were selected through convenience sampling. research instruments were hse job stress ques...

rails fracture by the growth of fatigue crack or critical crack is one of the prevalent defects in railway. the rail fracture, failure and stress analysis should be studied in order to prevention of rail fracture. in this paper, new formulation of contact stress for two rolling bodies is presented, where the results are closed to the hertz stress formulation. moreover, stress analysis is done b...

background: occupational stress takes place in relationship between person and environment. it’s created by three major factors including characteristics personal, working conditions, relationships between them. stress is caused by psychological imbalances and has different outcomes on health. this study examined the relationship between job stress and job satisfaction in health care staff. met...

nowadays, occupational accidents are one of the most important problems in developing countries. job stress and unsafe acts have been also recognized as effective factors in increasing the risk of occupational accidents. the main goal of this research was to evaluate the relationship between job stress and unsafe acts with occupational accidents. this study was performed on 195 employees in par...

objective: the present study aimed to determine whether castration altered osmotically stimulated vasopressin (vp) release and urinary volume and what is the role of endocrine-stress axis in this process. materials and methods: totally 108 mice were studied in two main groups of castrated (n=78) and control (n=30). each group was extracted by acute cold stress (4◦c for 2h/day), restraint stress...

introduction safflower is native to iran, and is cultivated for high adaptability, low water requirement, resistance to drought and useful unsaturated fatty acid (ashri et al., 1977). identification of effective agronomic traits and relationship between them are important aims under water stress conditions. among these characters, grain yield is the most important trait that is genetically poly...