a study was made of the coking of a commercial fresh sulfide ni-mo/al2o3 catalyst in a fixed-bed reactor. the catalyst was coked using different coke precursors in the gas oil under accelerated conditions at temperatures of 400 to 450°c to yield different deactivated catalysts containing 2-20 wt% c. two cases were studied; crushed catalyst without diffusional resistance and extruded pellets wit...

background: despite wide application of chromium in electroplating industry, the pulmonary effects of chronic exposure to this chemical have not been extensively studied and are subject of debate and controversy. this study was, therefore, undertaken to further address this issue.   methods: the study population consisted of a group of 15 workers with a history of past and present occupational ...

background: the rapidity of progression of amyotrophic lateral sclerosis (als) to death or respiratory failure impacts patients, clinicians, and clinical investigators. the aim of this study is to evaluate of the pulmonary function tests (pfts) in patients with als and the association between these pfts and survival methods: a total of 36 als patients who pfts, including vital capacity (vc), ma...

background: cognitive impairment in patients with parkinson’s disease (pd) mainly involves executive function (ef). the frontal assessment battery (fab) is an efficient tool for the assessment of efs. the aims of this study were to determine the validity and reliability of the psychometric properties of the persian version of fab and assess its correlation with formal measures of efs to provide...

sociability of educational spaces is crucial to the quality of education because a major part of learning takes place through attending public spaces, acting in spaces, social interaction with peers, and collective life in public spaces. sociability provides for the users’ social needs. the present study seeks to explore the development of sociability in educational spaces through increasing op...

background & aim: one of the most important events in human life is marriage. sexual satisfaction is one of the effective factors in a successful marriage. accordingly, sexual health education is necessary. sex education should be in line with the cultural, religious, and social infrastructures of the society. the aim of this study was to compare the effect of sex education with and without rel...

in this paper, the main results are:a study of the finitely generated mv-algebras of continuous functions from the n-th power of the unit real interval i to i;a study of hopfian mv-algebras; anda category-theoretic study of the map sending an mv-algebra as above to the range of its generators (up to a suitable form of homeomorphism).

background: spasticity is one of the problems after a stroke. due to this increase in muscle tone, patients are confronted with problems in motor control and difficulties in activities of daily living and complications such as shortness and contracture. the aim of this study was to examine the effects of the simultaneous use of both splint and botulinum toxin-a (btx-a) injection on spasticity, ...

the rapid pace of changing technology is leading to high rate of import and export between different countries. in outsourcing governmental organizations duties to private sectors, it is a need to control sectors and they should be under assessment policy. this research has been developed to show how the accredited laboratories of iranian standard (isiri) can be assessed for their technical ser...

background: there is conflicting reports on the respiratory health effects of indoor risk factor exposure. the aim of this study was to assess the association of indoor environmental factors to pulmonary function in an adult population in zunyi city of southwest china. methods: between july and sep 2012, we conducted a cross-sectional survey of people aged ≥18 yr in 11 inner-city areas of zunyi...