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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
931

Multi-marker Metabarcoding Assessment of Biodiversity within Stream Biofilm Communities along an Acid Mine Drainage Recovery Gradient

Wolf, Daniel I., Wolf 01 October 2018 (has links)
No description available.
932

Stratified Arrays of Needle-Type Oxidation Reduction Potential Sensors

Radhakrishnan, Praveen Kumar 22 December 2009 (has links)
No description available.
933

The role of zinc-dependent intercellular adhesion in biofilm formation in <i>Staphylococcus epidermidis</i>

Conrady, Deborah 26 July 2010 (has links)
No description available.
934

Retention and Removal of Bacterial Endospores from Common Drinking Water Distribution System Pipe Materials

Packard, Benjamin H. 05 August 2010 (has links)
No description available.
935

Needle-Type Sensor For In Situ 3-D Multi-Analyte Mapping

Choi, Woo-Hyuck January 2011 (has links)
No description available.
936

Chlorine Transport and Decay Studies of a Pilot-Scale Drinking Water Distribution Dead End Pipe System

Li, Sylvana Y. January 2000 (has links)
No description available.
937

AmrZ Is a Central Regulator of Biofilm Formation in Pseudomonas aeruginosa

Jones, Christopher Joseph January 2013 (has links)
No description available.
938

Design and Study of Novel Antimicrobial Peptides with Proline Substitution

He, Jing January 2009 (has links)
No description available.
939

Molecular Microbiological Analysis of Dental Caries in the Primary and Permanent Dentitions

Gross, Erin Leigh 08 September 2009 (has links)
No description available.
940

Effect of Stevia on oral biofilms - a pilot study in vitro

Romi, Fadi, Holmkvist, André January 2016 (has links)
SyfteSyftet med denna laborativa pilotstudie in vitro var att undersöka hur den mikrobiella sammansättningen och pH i den orala biofilmen påverkades vid upprepad exponering för Stevia (steviosid och rebaudiosid A), sackaros eller en kombination av reb A och sackaros. Ett ytterligare syfte var att studera om isolat av orala bakterier kunde metabolisera reb A i buljongkultur. Material och metodBiofilmer från tre personer blev exponerade för 0,025 % steviosid, 0,025 % reb A eller 10 % Todd Hewitt (TH) under 15 minuter tre gånger dagligen i fyra dagar. Artbestämning gjordes i början och slutet av försöken. Biofilmerna exponerades för 0,025 % reb A och 10 % sackaros eller en kombination av dessa varefter pH-värdet mättes. Vidare studerades 23 bakteriestammar avseende förmåga att metabolisera 0,025% respektive 0,5% reb A. ResultatStreptokocker dominerade i samtliga biofilmer vid försökets slut oavsett om de exponerats för steviosid, reb A eller enbart TH. En pH-sänkning kunde ses hos biofilmerna som enbart blivit exponerade för sackaros eller för en kombination av sackaros och reb A. Däremot kunde endast en marginell pH-sänkning observeras efter exponering för enbart reb A. Ingen av de enskilda bakteriestammar som studerades kunde metabolisera reb A.SlutsatsIngen större skillnad i biofilmens bakteriesammansättning kunde ses efter upprepad exponering för steviosid eller reb A i förhållande till TH.Upprepade exponeringar av reb A i kombination med sackaros gav en liknande pH-sänkning som enbart sackaros, dock sågs ingen pH-sänkning efter exponering för enbart reb A. Enskilda bakteriestammar kunde inte metabolisera reb A. / AimsIn this in vitro laboratory pilot study, the effect on the microbial composition and pH of the oral biofilms after repeated exposure to Stevia (stevioside and rebaudioside A), saccarose or a combination, was investigated. Another aim was to study whether isolate of oral bacteria were able to metabolise reb A in broth bacteria culture.Material and MethodBiofilms from three adult individuals were repeatedly exposed to 0,025% stevioside, 0,025% reb A or 10% Todd Hewitt (TH). Samples were taken at the beginning and at the end of the experiment for cultivation and bacterial identification.Biofilms were exposed to 0,025% reb A and 10% saccharose, either separately or combined, followed by a pH-measurement. Furthermore, 23 bacterial species were studied in regards to ability to metabolize reb A. ResultsAll biofilms were dominated by Streptococcus regardless of whether they were exposed to stevioside, reb A, or TH. A pH-decrease was seen in biofilms exposed to saccharose or a combination of saccharose and reb A. However, only minor changes were noted after exposure to reb A.None of the species studied were able to metabolize reb A.ConclusionNo major differences in the bacterial composition of the biofilms were seen after repeated exposure to stevioside or reb A compared to TH.No pH-decrease after repeated exposure to reb A was noted. Exposure to reb A combined with saccharose resulted in a pH-decrease similar to exposure to saccharose. The bacterial species tested in this study were not able to metabolise reb A.

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