نتایج جستجو برای: particle filtration efficiency

تعداد نتایج: 587853  

2015
Dan Zhao Parham Azimi Brent Stephens Gary Adamkiewicz Patricia Fabian

Much of human exposure to fine particulate matter (PM2.5) of outdoor origin occurs in residences. High-efficiency particle air filtration in central heating, ventilating, and air-conditioning (HVAC) systems is increasingly being used to reduce concentrations of particulate matter inside homes. However, questions remain about the effectiveness of filtration for reducing exposures to PM2.5 of out...

Journal: :AANA journal 2013
Mike Reed Oliver Kimberger Paul D McGovern Mark C Albrecht

Forced-air warming devices are effective for the prevention of surgical hypothermia. However, these devices intake nonsterile floor-level air, and it is unknown whether they have adequate filtration measures to prevent the internal buildup or emission of microbial contaminants. We rated the intake filtration efficiency of a popular current-generation forced-air warming device (Bair Hugger model...

Journal: :Aerosol Science and Technology 2021

The COVID-19 pandemic has resulted in a severe shortage of personal protective equipment. World Health Organization (WHO) and the US Centers for Disease Control Prevention (CDC) recommend t...

Journal: :Water research 2014
Anat Lakretz Hila Elifantz Igor Kviatkovski Gonen Eshel Hadas Mamane

In the current study we examined the impact of thread filtration using an automatic microfiber filter on Lake Kinneret water quality and as a new application to control biofouling over time. We found that automatic microfiber filtration (AMF) reduced total iron and aluminum in water by over 80%. Particle analysis (>2 μm) revealed a total particle removal efficiency of ≈ 90%, with AMF removal ef...

2011
Yasuhito Mukai Aya Nishio

Downward and upward ultrafiltration (UF) was performed using the suspensions of nanosized colloidal silica with different particle diameters and their filtration rates were compared. In downward UF, the filtration rate decreases as the particle diameter decreases because the specific filtration resistance of the filter cake becomes significantly higher. In contrast, the filtration rate in upwar...

2013
Dorina Gabriela Karottki Michal Spilak Marie Frederiksen Lars Gunnarsen Elvira Vaclavik Brauner Barbara Kolarik Zorana Jovanovic Andersen Torben Sigsgaard Lars Barregard Bo Strandberg Gerd Sallsten Peter Møller Steffen Loft

BACKGROUND Exposure to particulate air pollution increases respiratory and cardiovascular morbidity and mortality, especially in elderly, possibly through inflammation and vascular dysfunction. METHODS We examined potential beneficial effects of indoor air filtration in the homes of elderly, including people taking vasoactive drugs.Forty-eight nonsmoking subjects (51 to 81 years) in 27 homes ...

2006
Joon Sik Yoon John T. Germaine Patricia J. Culligan

[1] A technique for visualizing particle transport in the interior of a porous medium is presented. The technique, which includes the construction of a translucent medium and the use of laser-induced fluorescence for particle tracking, was used to examine the behavior of a dilute suspension of negatively charged, micron-sized particles in the interior of uniform glass bead packs during one-dime...

2009
Mark Albrecht Robert Gauthier David Leaper

Forced-air-warming (FAW) is an effective and widely used means for maintaining surgical normothermia, but FAW also has the potential to generate and mobilize airborne contamination in the operating room.We measured the emission of viable and non-viable forms of airborne contamination from an arbitrary selection of FAW blowers (n=25) in the operating room. A laser particle counter measured parti...

2016
Min Tang Yun Liang Jian Hu

Air quality control has become increasingly important in many industrial areas. Glass fiber filter paper is widely used for the collection of airborne particulate matter. Since glass fiber is fragile, fiber dispersion is believed to be important for controlling filter paper properties. In this paper, the impact of fiber dispersion on filtration performance and tensile properties was studied. Tw...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید