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Deposition of motile and non-motile ...

de Kerchove, Alexis J.

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Deposition of motile and non-motile bacteria onto conditioning films: Measurements and mechanisms.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Deposition of motile and non-motile bacteria onto conditioning films: Measurements and mechanisms./
作者:	de Kerchove, Alexis J.
面頁冊數:	234 p.
附註:	Adviser: Manachem Elimelech.
Contained By:	Dissertation Abstracts International68-12B.
標題:	Biology, Microbiology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3293312
ISBN:	9780549372370

Deposition of motile and non-motile bacteria onto conditioning films: Measurements and mechanisms.
de Kerchove, Alexis J.

Deposition of motile and non-motile bacteria onto conditioning films: Measurements and mechanisms. - 234 p.

Adviser: Manachem Elimelech.

Thesis (Ph.D.)--Yale University, 2007.

Understanding of the transport and deposition of microorganisms in engineered and natural aquatic environments remains an important challenge due to the complexity of these systems. In contrast with model colloidal systems, microorganisms, as well as environmentally-impacted solid interfaces (or substrates), are characterized by dynamic and heterogeneous polymeric structures on their surface that can significantly affect the deposition process.

ISBN: 9780549372370Subjects--Topical Terms:

1017734
Biology, Microbiology.

Deposition of motile and non-motile bacteria onto conditioning films: Measurements and mechanisms.
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100 1 $a de Kerchove, Alexis J. $3 1278941
245 1 0 $a Deposition of motile and non-motile bacteria onto conditioning films: Measurements and mechanisms.
300 $a 234 p.
500 $a Adviser: Manachem Elimelech.
500 $a Source: Dissertation Abstracts International, Volume: 68-12, Section: B, page: 8297.
502 $a Thesis (Ph.D.)--Yale University, 2007.
520 $a Understanding of the transport and deposition of microorganisms in engineered and natural aquatic environments remains an important challenge due to the complexity of these systems. In contrast with model colloidal systems, microorganisms, as well as environmentally-impacted solid interfaces (or substrates), are characterized by dynamic and heterogeneous polymeric structures on their surface that can significantly affect the deposition process.
520 $a The objectives of this research were (i) to investigate the importance of bacterial flagella and substrate conditioning films on cell deposition and (ii) to unravel the mechanisms governing the bacterial deposition process. A model alginate conditioning film and model flagellated (motile) and non-flagellated (non-motile) Pseudomonas aeruginosa strains were rigorously characterized for this research. Deposition kinetics experiments were conducted in a well-defined radial stagnation point flow chamber under controlled flow conditions and over a broad range of physicochemical conditions.
520 $a Deposition kinetics of non-motile bacteria indicated that in monovalent salts the attachment efficiency of the cell to bare and conditioned quartz substrates was governed by electrostatic interactions. Observed bacterial deposition rates were much greater than those predicted by DLVO theory. The marked underpredictions of the attachment efficiencies onto conditioned substrates by the DLVO theory were attributed, in part, to irreversible deposition of cells trapped in the secondary energy minimum. In the presence of divalent cations, deposition of non-motile bacteria was enhanced by specific biological interactions.
520 $a Deposition kinetics of motile bacteria demonstrated the importance of swimming motility on the transport and attachment of cells. Activation of the mechanisms involved in motility under optimal electrolyte conditions favored the transport of the cells and affected deposition dynamics. Low surface blocking and high maximum surface coverage were attributed to the ability of the cell to swim upstream and subsequently approach surface regions that are otherwise inaccessible to non-motile cells. Attachment of motile cells was demonstrated to depend on the activation of motility as well as on the conditioning film structure. Steric interactions between the flagella and the polymeric film were proposed to influence cell attachment.
520 $a Because the designed system provides a more realistic approach of the complexity of natural and engineered aquatic systems, these findings have important implications for the control and prevention of bacterial deposition. Novel contributions of this work impact a wide range of processes, including: membrane processes for water and wastewater treatment, in situ bioremediation, and microbial contamination of biomedical implants and devices.
590 $a School code: 0265.
650 4 $a Biology, Microbiology. $3 1017734
650 4 $a Engineering, Environmental. $3 783782
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710 2 $a Yale University. $3 515640
773 0 $t Dissertation Abstracts International $g 68-12B.
790 $a 0265
790 1 0 $a Elimelech, Manachem, $e advisor
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3293312