background noise exposure is known as a risk factor for hearing loss and one of its effects is noise-induced stress. cortisol as a stress hormone is used in noise-induced stress assessments. objectives the aim of this study was to measure and compare saliva cortisol concentrations in the morning and evening in normal work day and rest day in both case and control groups and to assess the associ...

background: ototoxic chemicals can impair the sense of hearing and balance. in the past decades, the ototoxicity of solvents and their interaction with noise have become evident. this study has been carried out in the shoe manufacturing factory in tehran (iran) with the aim of evaluating the combined effects of noise and toluene on the workers' hearing. materials and methods: this cross-se...

the main objective in this paper is creating a method for one-dimensional modeling of multi stage axial flow turbine. the calculation used in this technique is based on common thermodynamics and aerodynamics principles in a mean stream line analyses. in this approach, loss models have to be used to determine the entropy increase across each section in the turbine stage. finally, the analysis an...

this randomized clinical trial aimed to assess the efficacy of phlebotomy on improvement of hearing loss. 71 patients with sudden sensorineural hearing loss were enrolled in this randomized clinical trial study. they were divided into two groups: group a received steroid and hydration therapy plus phlebotomy, while group b received the same regimen without phlebotomy. they were matched accordin...

extensive blood loss in total hip surgery is well known and is associated with a high transfusion rate of allogeneic blood. the aim of this study is to assess the effects of intraoperative tranexamic acid on post-operative bleeding and need for allogeneic transfusion during hip fracture surgery. we investigated 67 patients undergoing hip fracture surgery in a prospective, randomized, double-bli...

kawasaki disease is a multi system disorder with varying clinical expressions. this disease is an acute systemic vasculitis of unknown etiology that has recently recognized as a leading cause of acquired heart disease in children of many developed countries. we describe an unusual instance of hair loss in a patient with kawasaki disease. a 26 months old boy developed prolonged high fever, bilat...

gross rainfall (gr) partitioning into throughfall (tf), stemflow (sf) and interception loss (i) was studied in a pure oriental beech (fagus orientalis lipsky) forest located in the central caspian region of northern iran. measurements were performed on a rainfall event basis in a 5625 m2 plot of the kheyrud forest research station of tehran university during 2008 and 2009 growing seasons. gr wa...

obesity is one of the health threatening problems and the second preventable mortality factor, the prevalence of which is increasing. the economic burden of obesity is estimated at 2-7% of the total healthcare costs and it is predicted to be top health problem of the world in 2025. therefore, following up obesity and developing effective clinical interventions is a significant measure taken in ...

conclusions the pregnancy adaptation training package increased the adaptation and maternal-fetal attachment scores in pregnant women with a history of baby loss. results before the intervention, there were no statistically significant differences between the study and control groups in terms of maternal-fetal attachment (p = 0.280) and adaptation to pregnancy (p = 0.883). however, following th...

background noise most frequently affects hearing system, as it may typically cause a bilateral, progressive sensorineural hearing loss at high frequencies. objectives this study was designed to compare three different methods to evaluate noise-induced hearing loss (conventional audiometry, high-frequency audiometry, and distortion product otoacoustic emission). material and methods this was a c...