Development of stratospheric whole air sampling system using LHe as a cryogen and its operation results for 15 years

2004 ◽  
Vol 33 (10) ◽  
pp. 1797-1805 ◽  
Author(s):  
H Honda
Sensors ◽  
2021 ◽  
Vol 21 (12) ◽  
pp. 4019
Author(s):  
Andrzej Szczurek ◽  
Monika Maciejewska

The basis of effective beekeeping is the information about the state of the bee colony. A rich source of respective information is beehive air. This source may be explored by applying gas sensing. It allows for classifying bee colony states based on beehive air measurements. In this work, we discussed the essential aspects of beehive air sampling and sensing device operation in apicultural applications. They are the sampling method (diffusive vs. dynamic, temporal aspects), sampling system (sample probe, sampling point selection, sample conditioning unit and sample delivery system) and device operation mode (‘exposure-cleaning’ operation). It was demonstrated how factors associated with the beehive, bee colony and ambient environment define prerequisites for these elements of the measuring instrument. These requirements have to be respected in order to assure high accuracy of measurement and high-quality information. The presented results are primarily based on the field measurement study performed in summer 2020, in three apiaries, in various meteorological conditions. Two exemplars of a prototype gas sensing device were used. These sensor devices were constructed according to our original concept.


2015 ◽  
Vol 64 (2) ◽  
pp. 564-573 ◽  
Author(s):  
J. M. Pacheco ◽  
B. Brito ◽  
E. Hartwig ◽  
G. R. Smoliga ◽  
A. Perez ◽  
...  

2018 ◽  
Vol 18 (11) ◽  
pp. 2721-2727 ◽  
Author(s):  
Hyeong-U Kim ◽  
Junhong Min ◽  
Geunsang Park ◽  
Dongjoo Shin ◽  
Giwoon Sung ◽  
...  

2004 ◽  
Vol 60 (4) ◽  
pp. 263-272 ◽  
Author(s):  
Daisuke KOMORI ◽  
Masatoshi AOKI ◽  
Tomoyasu ISHIDA ◽  
Satoru SUZUKI ◽  
Takashi SATOU ◽  
...  
Keyword(s):  

1981 ◽  
Vol 8 (10) ◽  
pp. 1079-1082 ◽  
Author(s):  
R. Leifer ◽  
K. Sommers ◽  
S. F. Guggenheim

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

2020 ◽  
Author(s):  
Lauren Brown ◽  
Dilhani Premaratna ◽  
Yonatan Segal ◽  
Travis Beddoe

Abstract Objective Infectious laryngotracheitis (ILT) is an acute and highly contagious viral respiratory disease of poultry, caused by gallid herpesvirus 1 (ILTV), which causes significant economic losses. Due to recent outbreaks of ILT in Australia, it has been proposed that ILT could be transmitted between poultry sheds by airborne transmission; however, there has never been direct detection of gallid herpesvirus 1 from air samples. We aimed to optimize a sampling system for the detection of airborne gallid herpesvirus 1 in poultry sheds.Results Poultry farms with a known clinical outbreaks of ILT were used as a test case for detection of airborne ILTV. Infected chickens were verified by detection of ILTV nucleic acid in feather shafts with all farms being positive. Using a liquid cyclonic impinging device, it was found that recovery and detection of airborne ILTV was possible in alkaline PEG buffer. Additional sampling was performed at different heights to determine the presence of ILTV in the air. In farm 3, all three air samples at both heights were positive for ILVT while at farm 2 only one sample at 45cm was positive. We envisaged in the future air sampling will be able to detect and track potential transmission of gallid herpesvirus 1 both inside and outside of the poultry shed.


2001 ◽  
Author(s):  
John A Glissmeyer ◽  
A David Maughan
Keyword(s):  

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