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31 results on '"Nguyen, Hang N."'

3. Widespread bacterial diversity within the bacteriome of fungi

Author

Robinson, Aaron J., House, Geoffrey L., Morales, Demosthenes P., Kelliher, Julia M., Gallegos-Graves, La Verne, LeBrun, Erick S., Davenport, Karen W., Palmieri, Fabio, Lohberger, Andrea, Bregnard, Danaé, Estoppey, Aislinn, Buffi, Matteo, Paul, Christophe, Junier, Thomas, Hervé, Vincent, Cailleau, Guillaume, Lupini, Simone, Nguyen, Hang N., Zheng, Amy O., Gimenes, Luciana Jandelli, Bindschedller, Saskia, Rodrigues, Debora F., Werner, James H., Young, Jamey D., Junier, Pilar, and Chain, Patrick S. G.

Published
2021
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10. Real-Time Culture-Independent Microbial Profiling Onboard the International Space Station Using Nanopore Sequencing

Author

Stahl-Rommel, Sarah, primary, Jain, Miten, additional, Nguyen, Hang N., additional, Arnold, Richard R., additional, Aunon-Chancellor, Serena M., additional, Sharp, Gretta Marie, additional, Castro, Christian L., additional, John, Kristen K., additional, Juul, Sissel, additional, Turner, Daniel J., additional, Stoddart, David, additional, Paten, Benedict, additional, Akeson, Mark, additional, Burton, Aaron S., additional, and Castro-Wallace, Sarah L., additional

Published
2021
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11. Democratization of fungal highway columns as a tool to investigate bacteria associated with soil fungi

Author

Junier, Pilar, primary, Cailleau, Guillaume, additional, Palmieri, Ilona, additional, Vallotton, Celine, additional, Trautschold, Olivia C, additional, Junier, Thomas, additional, Paul, Christophe, additional, Bregnard, Danae, additional, Palmieri, Fabio, additional, Estoppey, Aislinn, additional, Buffi, Matteo, additional, Lohberger, Andrea, additional, Robinson, Aaron, additional, Kelliher, Julia M, additional, Davenport, Karen, additional, House, Geoffrey L, additional, Morales, Demosthenes, additional, Gallegos-Graves, La Verne, additional, Dichosa, Armand E K, additional, Lupini, Simone, additional, Nguyen, Hang N, additional, Young, Jamey D, additional, Rodrigues, Debora F, additional, Parra-Vasquez, A Nicholas G, additional, Bindschedler, Saskia, additional, and Chain, Patrick S G, additional

Published
2021
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24. Level of Fimbriation Alters the Adhesion of Escherichia coli Bacteria to Interfaces.

Author

McLay, Ryan B., Nguyen, Hang N., Jaimes-Lizcano, Yuly Andrea, Dewangan, Narendra K., Alexandrova, Simone, Rodrigues, Debora F., Cirino, Patrick C., and Conrad, Jacinta C.

Subjects
*ESCHERICHIA coli, *MICROBIAL adhesion, *BACTERIAL diseases, *BIOFILMS, *BIOREMEDIATION, *OIL spills
Abstract

Adhesion of bacteria to interfaces is the first step in pathogenic infection, in biofilm formation, and in bioremediation of oil spills and other pollutants. Bacteria use a variety of surface structures to promote interfacial adhesion, with the level of expression of these structures varying in response to local conditions and environmental signals. Here, we investigated how overexpression of type 1 fimbriae, one such appendage, modifies the ability of Escherichia coli to adhere to solid substrates, via biofilm formation and yeast agglomeration, and to oil/water interfaces, via a microbial adhesion to hydrocarbon assay. A plasmid that enables inducible expression of E. coli MG1655 type 1 fimbriae was transformed into fimbriae-deficient mutant strain MG1655ΔfimA. The level of fimH gene expression in the engineered strain, measured using quantitative real-time PCR, could be tuned by changing the concentration of inducer isopropyl β-D-1-thiogalactopyranoside (IPTG), and was higher than that in strain MG1655. Increasing the degree of fimbriation only slightly modified the surface energy and zeta potential of the bacteria, but enhanced their ability to agglomerate yeast cells and to adhere to solid substrates (as measured by biofilm formation) and to oil/water interfaces. We anticipate that the tunable extent of fimbriation accessible with this engineered strain can be used to investigate how adhesin expression modifies the ability of bacteria to adhere to interfaces and to actively self-assemble there. [ABSTRACT FROM AUTHOR]

Published
2018
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31. CO 2 sequestration by ureolytic microbial consortia through microbially-induced calcite precipitation.

Author

Okyay TO, Nguyen HN, Castro SL, and Rodrigues DF

Subjects
Biodiversity, Caves, Chemical Precipitation, Microbial Consortia genetics, Turkey, Calcium Carbonate chemistry, Carbon Dioxide metabolism, Carbon Sequestration, Microbial Consortia physiology
Abstract

Urea is an abundant nitrogen-containing compound found in urine of mammals and widely used in fertilizers. This compound is part of the nitrogen biogeochemical cycle and is easily biodegraded by ureolytic microorganisms that have the urease enzyme. Previous studies, with ureolytic isolates, have shown that some ureolytic microorganisms are able to sequester CO 2 through a process called microbially-induced calcium carbonate precipitation. The present study investigates 15 ureolytic consortia obtained from the "Pamukkale travertines" and the "Cave Without A Name" using different growth media to identify the possible bacterial genera responsible for CO 2 sequestration through the microbially-induced calcite precipitation (MICP). The community structure and diversity were determined by deep-sequencing. The results showed that all consortia presented varying CO 2 sequestration capabilities and MICP rates. The CO 2 sequestration varied between 0 and 86.4%, and it depended largely on the community structure, as well as on pH. Consortia with predominance of Comamonas, Plesiomonas and Oxalobacter presented reduced CO 2 sequestration. On the other hand, consortia dominated by Sporosarcina, Sphingobacterium, Stenotrophomonas, Acinetobacter, and Elizabethkingia showed higher rates of CO 2 uptake in the serum bottle headspace., (Copyright © 2016 Elsevier B.V. All rights reserved.)

Published
2016
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