limestone, exploited near bielawy, a town located in the kujawsko-pomorskie province ofpoland, is the main raw material in the production process in a cement plant. the dust emitted by the factory is of alkaline ph and contains such heavy metals as: cadmium (cd), lead (pb), chromium (cr) and nickel (ni). the research aims at assessing the influence of cement dust on the total content and bioava...

background: the virulence of a pathogenic vibrio cholerae is dependent on a discrete set of genetic determinants. in this study, we determined the distribution of virulence determinants among the clinical and environmental isolates of v. cholerae. methods: the antibiotic resistance profiles of the isolates were determined using standard disk diffusion assay. pcr assay was performed to analyze t...

background: considering the controversial information regarding the effects of perchlorate on thyroid function of high risk population as neonates, and given the high prevalence rate of thyroid disorders specially congenital hypothyroidism in our region, this study aims to investigate for the frst time in iran, the relationship between drinking groundwater perchlorate and cord blood thyroid hor...

background and purpose: the medical educational environment is increasingly becoming the focus of research globally. it is commonly understood that educational environments are an important factor for efficient learning. the present study was done with the aim to evaluation of clinical phase students' perception of learning environment of our teaching hospital and comparing it with the previous...

Virtual geographic environment (VGE) aims to express the real-world naturally, and support the complex geographic analysis. The data environment, fundamental of VGE, is expected to support the data management, analysis, sharing and application requirements of the massive complex geographic spatio-temporal data. In this paper, we summarized the key problems in the construction of the data enviro...

admiration for environment in general needs to be profoundly rooted in an understanding of history. urban history is unique not only in the fact that it reflects climate but also in that it cuts across many different fields. in most schools of urban studies many aspects of science and technology are taught with relation to design in order to attain skills for practice. during a student’s later ...

background: this study presents a framework for development of integrated health, safety and ergonomic (hse) in complex critical systems. total ergonomics model considers conventional ergonomics factors as well as management and organizational factors. methods : control room operation and maintenance department of a thermal power plant was chosen as the case of our study. to achieve the above o...

background: conventional health, safety and environment (hse) are a widely used approach to enhance availability and efficiency of complex systems. the integrated hsee system is defined however as integration of conventional hse with ergonomics approach. the presented hsee system introduces a unique, effective and systemic mechanism, which integrates the structure of the human and organizationa...