نتایج جستجو برای: contamination factor was calculated accordingly
تعداد نتایج: 4481843 فیلتر نتایج به سال:
Background and Objective: Today, soil and water pollution with heavy metals is one of the major challenges around the world. The aim of this study is to investigate the contamination of soils around a lead and zinc mine. Materials and Methods: In the summer of 2019, 100 soil samples were taken from the mine vicinity and the characteristics of texture, acidity, salinity, calcium carbonate, orga...
heavy metal contamination around the national iranian lead and zinc company (nilz) in zanjan province was evaluated in this paper. collected data were used to appraise the degree of soil contamination and also the source of pollution in the study area based on geoaccumulation index (igeo), and enrichment factor (ef). the levels of fe, zn, cd and pb in the samples exceed those reported in litera...
some new water-soluble schiff base complexes of na2[m(5-so3-1,2-salophen)].nh2o; (5-so3-1,2-salophen = n,n’-bis(5-sulphosalicyliden)-1,2-phenylendiamine); na2[m(5-so3-2,3-salpyr)(h2o)n].2h2o; (5-so3-2,3-salpyr = n,n’-bis(5-sulphosalicyliden)-2,3-diaminopyridine); and na2[m(5-so3-3,4-salbenz)(h2o)n].nh2o; (5-so3-3,4-salbenz = n,n’-bis(5-sulphosalicyliden)-3,4-diaminobenzophenon); where m = cu, n...
the primary goal of the current project was to examine the effect of three different treatments, namely, models with explicit instruction, models with implicit instruction, and models alone on differences between the three groups of subjects in the use of the elements of argument structures in terms of toulmins (2003) model (i.e., claim, data, counterargument claim, counterargument data, rebutt...
In this study, the measurement and decomposition of risk were examined risks national stock market indices BRICS-T countries (Brazil, Russia, India, China, South Africa Turkey) measured using monthly closing data for 2009-2018 period, based on US market. S&P 500 index was chosen as index. Accordingly, total are calculated separated into systematic non-systematic risks. addition, beta coeffi...
introduction: careful planning on health care may prevent the spread of disease and reduce the expense for treatment. regarding the importance of health care in the clinical centers including physiotherapy clinics, this study was designed to investigate the rate of bacterial contamination of electrotherapy’s pads which use in the physiotherapy clinics of semnan university of medical sciences (i...
Background: Monte Carlo method (MC) has played an important role in design and optimization of medical linacs head and beam modeling. The purpose of this study was to compare photon beam features of two commercial linacs, Varian 21EX and Elekta SL-25 using MCNP4C MC code. Materials and Methods: The 6MV photon beams of Varian 21EX and Elekta Sl-25 linacs were simulated based on manufacturers pro...
INTRODUCTION Limited data exist on patient factors related to environmental contamination with Clostridium difficile. METHODS We evaluated the association between the functional status of patients with C. difficile infection (CDI) and environmental contamination with C. difficile. RESULTS Contamination of patient rooms was frequent and higher functional status was associated with contaminat...
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