نتایج جستجو برای: term exposure
تعداد نتایج: 862601 فیلتر نتایج به سال:
Background: Exposure to noise can induce hearing loss. Thus noise induced hearing loss is one of the main concerns in interventional study on health effect of noise exposure. We analyzed pre and post exposure audiometeries of volunteers in a clinical trial study that we conducted for effect of noise exposure on cardiovascular system. Methods: In a clinical trial study, 100 healthy, 20-40 aged, ...
background : substantial evidence indicates that exposure to electromagnetic fields (emf) above certain levels can affect human health through triggering some biological responses. according to who, short-term exposure to emf at the levels present in the home/environment do not cause any apparent detrimental effects in healthy individuals. however, now, there is a debate on whether long-term ex...
one very decisive factor in students’ academic destiny is the result they get at final term examinations. because of its importance, both students and teachers are curiously anxious about them. as normally it is the case, these final term tests are prepared hurriedly in short time by teachers which result in students’ dissatisfaction, complaining on how the test was different from their expecta...
background: exposure to organic solvents is common among workers. objective: to assess neurobehavioral effects of long-term exposure to organic solvents among rubber workers in tehran, iran. methods: across-sectional study was conducted on 223 employees of a rubber industry. the participants completed a data collection sheet on their occupational and medical history, and demographic characteris...
introduction: the effects of electromagnetic fields on biological organisms have been a controversial and also interesting debate over the past few decades, despite the wide range of investigations, many aspects of extremely low frequency electromagnetic fields (elf/emfs) effects including mechanism of their interaction with live organisms and also their possible biological applications still r...
Introduction: Exposure to organic solvents cause adverse effects on various systems such as the central nervous system, behavioral and cognitive changes, sleep disorders, as well as changes in mood. This study was aimed to evaluate the effect of long term exposure to mixed organic solvents on positive and negative aspects of the mood of the workers of a painting industry. Material and Method...
There exist several eLearning tools, with varying functionality and purpose. We think that in the coming years we will see many developments and possibilities in the eLearning tools research field. Relatively recent developments that will have a significant impact on eLearning tools are the development of standards for specifying educational material, and the development of methods for construc...
In this research, an improved psychrometer is developed to solve practical issues arising in the relative humidity measurement of challenging drying environments for meat manufacturing in agricultural and agri-food industries. The design in this research focused on the structure of the improved psychrometer, signal conversion, and calculation methods. The experimental results showed the effect ...
Die skrywer glo dat opnames onder hoërskoolleerlinge waardevoUe demografiese inligting kan voorsien. Die uitvoerbaarheid hiervan is in die veld getoets. In die bespreking van die bevindings stel die skrywer ’n stelsel vir die registrasie van geboortes en sterftes in nasionale state voor waarin die gemeenskapsverpleegkundige en piaaslikc kliniek gebruik word. Watter wyse van registrasie ook op b...
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