The use of Whatman-41 filters for high volume air sampling

1975 ◽  
Vol 9 (1) ◽  
pp. 101-109 ◽  
Author(s):  
H.E. Neustadter ◽  
S.M. Sidik ◽  
R.B. King ◽  
J.S. Fordyce ◽  
J.C. Burr
Keyword(s):  
Air Sampling ◽  
High Volume

scholarly journals 2.3.4 Extraterrestrial Particles in the Stratosphere

1976 ◽  
Vol 31 ◽  
pp. 279-283
Author(s):  
D.E. Brownlee ◽  
D.A. Tomandl ◽  
P.W. Hodge
Keyword(s):  
Silicone Oil ◽  
Thick Films ◽  
Air Sampling ◽  
High Volume ◽  
Ambient Air ◽  
Sampling Time ◽  
Sampling Techniques ◽  
The Past ◽  
Sampling Volume ◽  
Balloon Experiments

Over the past several years we have collected 2µm to 30µm particles from the stratosphere using high volume air sampling techniques. In 1970 and 1971 we flew balloon experiments to 34 km, sampling particles from 1.1 × 104 m3 of ambient air. Beginning in March 1974 we have flown 100 hours of sampling time on a NASA U-2 aircraft yielding a sampling volume of 9.3 × 104 m3. In both programs particles are collected by inertial deposition from a 200 ms−1 airstream on to clean surfaces coated with thick films of 500,000 centistokes silicone oil.

Personal and high-volume air-sampling correlation particulates

1974 ◽  
Vol 8 (8) ◽  
pp. 765-767 ◽  
Author(s):  
Phillip M. Duvall ◽  
Richard C. Bourke
Keyword(s):  
Air Sampling ◽  
High Volume

Comparison and evaluation of a high volume air sampling system for the collection of Clostridioides difficile endospore aerosol in health care environments

2020 ◽  
Vol 48 (11) ◽  
pp. 1354-1360
Author(s):  
Casey W. Cooper ◽  
Kathleen A.N. Aithinne ◽  
Bradley S. Stevenson ◽  
Jon E. Black ◽  
David L. Johnson
Keyword(s):  
Health Care ◽  
Air Sampling ◽  
High Volume ◽  
Sampling System ◽  
Clostridioides Difficile

scholarly journals Desorption of Herbicides from Atmospheric Particulates During High-Volume Air Sampling

Atmosphere ◽  
2011 ◽  
Vol 2 (4) ◽  
pp. 671-687 ◽  
Author(s):  
Allan J. Cessna ◽  
Don T. Waite ◽  
Jonathan Bailey ◽  
Lorne A. Kerr ◽  
Dwight V. Quiring
Keyword(s):  
Air Sampling ◽  
High Volume ◽  
Atmospheric Particulates

Morphology, Distribution and Identification of Micro-Constituents Along Grain Boundaries in Nickel-Base Alloys

1973 ◽  
Vol 31 ◽  
pp. 176-177
Author(s):  
D. E. Fornwalt ◽  
A. R. Geary ◽  
B. H. Kear
Keyword(s):  
Electron Microscope ◽  
Grain Boundaries ◽  
Volume Fraction ◽  
Rupture Life ◽  
Stress Rupture ◽  
High Volume ◽  
Precipitate Morphology ◽  
Stress Rupture Life ◽  
Nickel Base ◽  
Scanning Electron

A systematic study has been made of the effects of various heat treatments on the microstructures of several experimental high volume fraction γ’ precipitation hardened nickel-base alloys, after doping with ∼2 w/o Hf so as to improve the stress rupture life and ductility. The most significant microstructural chan§e brought about by prolonged aging at temperatures in the range 1600°-1900°F was the decoration of grain boundaries with precipitate particles.Precipitation along the grain boundaries was first detected by optical microscopy, but it was necessary to use the scanning electron microscope to reveal the details of the precipitate morphology. Figure 1(a) shows the grain boundary precipitates in relief, after partial dissolution of the surrounding γ + γ’ matrix.

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