نتایج جستجو برای: protection efficiency

تعداد نتایج: 561202  

Journal: :Research Bulletin of the National Technical University of Ukraine "Kyiv Politechnic Institute" 2016

Journal: :Applied and environmental microbiology 2013
Eric M Kettleson Jill M Schriewer R Mark L Buller Pratim Biswas

Protection of the human lung from infectious agents, allergens, and ultrafine particles is difficult with current technologies. High-efficiency particulate air (HEPA) filters remove airborne particles of >0.3 μm with 99.97% efficiency, but they are expensive to maintain. Electrostatic precipitation has been used as an inexpensive approach to remove large particles from airflows, but it has a co...

ژورنال: سلامت کار ایران 2012
جهانگیری, مهدی , رحیمی فروشانی, عباس , رشیدی, علیمراد, شاه طاهری, سید جمال الدین , عدل, جواد , کاکویی, حسین, کی پور, جواد,

  Background and aims: For ensuring about proper performance of air-purifying respirators in providing protection against workplace contaminants, it is necessary to change the respirator cartridges before the end of their service life. The aim of this study was determination of service life of organic vapor cartridges using a simple and practical method in a spray painting booth of a car manufa...

High oxidative capacity of polyunsaturated fatty acid rich oils is the main problem with their dietary application. The main objectives of this study were to determine the effects of different encapsulants and oil loading levels on nutritive value, fatty acid profile, and oxidative stability of microencapsulated fish oil powders. Four types of wall materials [glucose syrup and maltodextrin base...

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