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Electrostatic collection of airborne...

Mainelis, Gediminas.

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Electrostatic collection of airborne microorganisms.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Electrostatic collection of airborne microorganisms./
Author:	Mainelis, Gediminas.
Description:	290 p.
Notes:	Chair: Klaus Willeke.
Contained By:	Dissertation Abstracts International61-09B.
Subject:	Biology, Microbiology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9989325
ISBN:	0599961007

Electrostatic collection of airborne microorganisms.
Mainelis, Gediminas.

Electrostatic collection of airborne microorganisms. - 290 p.

Chair: Klaus Willeke.

Thesis (Ph.D.)--University of Cincinnati, 2000.

The findings of this study have shown that collection of viable airborne microorganisms by electrostatic means has the potential for being an efficient and accurate collection method. Such a method may lead to more accurate exposure monitoring.

ISBN: 0599961007Subjects--Topical Terms:

1017734
Biology, Microbiology.

Electrostatic collection of airborne microorganisms.
LDR:03369nam 2200325 a 45 001 932643
005 20110505
008 110505s2000 eng d
020 $a 0599961007
035 $a (UnM)AAI9989325
035 $a AAI9989325
040 $a UnM $c UnM
100 1 $a Mainelis, Gediminas. $3 1256384
245 1 0 $a Electrostatic collection of airborne microorganisms.
300 $a 290 p.
500 $a Chair: Klaus Willeke.
500 $a Source: Dissertation Abstracts International, Volume: 61-09, Section: B, page: 4636.
502 $a Thesis (Ph.D.)--University of Cincinnati, 2000.
520 $a The findings of this study have shown that collection of viable airborne microorganisms by electrostatic means has the potential for being an efficient and accurate collection method. Such a method may lead to more accurate exposure monitoring.
520 $a Exposure to bioaerosols, especially to pathogenic or allergenic microorganisms, may cause a wide range of respiratory and other health disorders in occupational and general populations. Methods commonly used to monitor exposure to airborne microorganisms, such as impaction and impingement, are known to affect the viability of sensitive microorganisms, which, in turn, leads to underestimations of bioaerosol exposure levels. This research was undertaken to investigate the hypothesis that airborne biological particles can be efficiently collected by electrostatic means without being inactivated. In this method, the airborne particles are electrically charged and then deposited on a collection substrate by electrostatic forces.
520 $a This study has shown that collection of airborne microorganisms by electrostatic means is feasible, if electrical charging by corona discharge is avoided and the charge levels do not exceed certain positive or negative charge limits. The levels of electric charges on airborne microorganisms and their effect on microorganism viability and injury were studied using a newly designed and built experimental setup. In this setup, electric charges onto airborne microorganisms are imposed by means of induction charging. Microorganism fractions carrying electric charges of specific magnitude and polarity are extracted by an electrical mobility analyzer and collected by a microbial sampler.
520 $a It was found that electric charging by means of induction does not affect the bacterial viability. This study also found that microorganisms in the airborne state may carry more than 10,000 elementary electric charges, in which case their collection by electrostatics is possible without additional charging. It was determined, however, that very high positive electric charges inactivate sensitive bacteria, such as <italic>Pseudomonas fluorescens</italic>, while the viability of bacterial spores, such as <italic>Bacillus subtilis </italic> var. <italic>niger</italic>, carrying the same amount of electric charge, is not affected. It was also determined and that electric fields of up to 2,000 V/cm efficiently collect airborne microorganisms without affecting their viability.
590 $a School code: 0045.
650 4 $a Biology, Microbiology. $3 1017734
650 4 $a Environmental Sciences. $3 676987
650 4 $a Health Sciences, General. $3 1017817
690 $a 0410
690 $a 0566
690 $a 0768
710 2 0 $a University of Cincinnati. $3 960309
773 0 $t Dissertation Abstracts International $g 61-09B.
790 $a 0045
790 1 0 $a Willeke, Klaus, $e advisor
791 $a Ph.D.
792 $a 2000
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9989325