background  & aim: case-crossover  studies are the case-control  version of crossover studies. in these studies, cases and controls are the same subjects. the term crossover is applied for designs that all subjects pass through both treatment (exposure) and placebo (non-exposure) phases. in fact they are  crossover  of  subjects  between  periods  of  exposure  and  non-exposure.  this  design ...

the effect of hydraulic retention time in a range from 1.0-5.5 days was evaluated in a laboratoryscaleanaerobic fixed bed reactor packed with a hybrid material composed of tire rubber and zeolite. underthese conditions, cod removal efficiencies varied from 28.3% to 82.1%, respectively. over the more than 6months of operation, no clogging was observed. the results obtained demonstrated that this...

Cystic Hygroma is a well-recognized lesion in paediatric patients but it is very rare in adults. We report here a case of Cervical Cystic Hygroma in a 45 yr old male. The reasons to present this case are 1) Its rarity in adults 2) Unusual age of presentation 3) Simulates various benign and malignant lesions at this site 4) Is a diagnostic challenge and 5) Role of histology for definitive postop...

abstract objectives: this study aimed to determine the effectiveness of schema therapy in the treatment of social anxiety disorder.method: the research method was a single-case experimental design with multiple baselines. five patients were selected by purposive sampling method. they were treated in 20 individual sessions according to young's schema therapy model. the data were collected by tes...

the available experiments and reports of executed projects in iranian research centers and universities show that the ability of know-how development of chemical and petrochemical synthesis as well as their required catalyst is existed in laboratory scale. although, know-how development in larger scale is possible, too but no certain scientific and classified method has been explained which is ...

study of different islamic agreements efficiency in free of interest banking system through modern scientific approaches is of outmost importance. in this paper attempt has been made to study and compare the efficiency of charity loan agreement and cooperative agreements by dea approach in branches of mellat bank in kermanshah province as case study. in this direction, the data related to five ...

Climate change has become a challenge with adverse impacts on the Earth. Reducing the use of fossil fuel is a primary step to solve environmental problems. As the population continues to rise, to meet the growing demand for construction with a large share in energy Consumption, Efforts to make the built environment more energy efficient is crucial. The main objective of this research is to eval...

normal 0 false false false en-us x-none ar-sa microsoftinternetexplorer4 background : traumatic brain injury (tbi) is known as one of the most important causes of mortality in middle-aged population. the aim of this study was to evaluate the effects of gabapentin in improvement of consciousness level in these patients. methods : this randomized clinical trial was performed in march 2008 to sept...