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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.
11

e influence of extrinsic stresses on the growth and endotoxin profiles of Escherichia coli and Pseudomonas aeruginosa

Smith, E.M. January 2013 (has links)
Published Article / The LPS, endotoxin of Gram-negative organisms in communal growth as compared to pure culture was the focus of this research. The experiment aimed to show pure and communal samples grown in the presence of the extrinsic stresses. The change in toxicity was measured using the Limulus Amoebocyte Lysate (LAL) test. The overall sensitivity of organisms was similar for the same sanitiser and the same detergent. Growth in community was found not to be the arithmetic sum of the individual growth patterns. The detergents had a marked effect on the growth of all samples throughout the growth cycle. This finding reveals that the acceptable refrigeration temperatures still allows for pathogen growth and thus for biofilm formation. The quantification by LAL showed that the enumeration of the food-borne pathogens isolated from households might not be indicative of acclimatisation obtained over short periods of time and the causal stress could turn these organisms into more or less toxic pathogens.
12

Characterisation of the lipopolysaccharide stimulated NF#kappa#B signal transduction pathway in rat aortic smooth muscle cell

Torrie, Lindsay J. January 2002 (has links)
No description available.
13

A molecular analysis of the potassium efflux system KefC

Wood, Claire M. January 1996 (has links)
KefB and KefC are glutathione-gated potassium channels that play a protective role during the detoxification of electrophiles in Gram negative bacteria. The KefC channel from Klebsiella aerogenes has been characterised and the gene cloned and sequenced. The KefC channel from K. aerogenes is analogous to KefC from Escherichia coli. The electrophile compounds NEM and CDNB are strong activators of potassium loss via the channel, whereas, methylglyoxal is a weak activator of potassium loss. At the amino acid level the putative protein shows a high degree of similarity with KefC from E. coli. While sequencing the kefC gene from K. aerogenes a difference in the genome organisation of K. aerogenes and E. coli was observed, highlighting the presence of an unassigned ORF, yabF, that overlaps the kefC by 8 bp. Clones of the K. aerogenes kefC gene that lack the first 129 bp of yabF exhibit reduced KefC activity. Analysis of the sequence surrounding the kefB gene from E. coli revealed an ORF, yhaH, that encodes a homologue of the putative YabF protein. The amino acid distribution of YabF and YhaH predict soluble proteins with significant similarity to the NAD(P)H dehydrogenase quinone oxidoreductase, DHQV. To investigate the function of YabF, a strain lacking the yabF-kefC region in E. coli was constructed. The strain was transduced into a kefB background and when transformed with a plasmid expressing only KefC channel activity was greatly reduced. The data suggest that the YabF protein is required in trans for the activity of KefC and preliminary evidence from in vitro-galactosidase fusion studies suggest that yabF and kefC genes may form an operon.
14

The enzymology of cell division in Pseudomonas aeruginosa.

Bhatti, Mohammad Abdul Rashid January 1976 (has links)
No description available.
15

Studies of structure-function relationship of components of multidrug efflux pumps and type I secretion systems

Polleichtner, Johann Georg. Unknown Date (has links) (PDF)
University, Diss., 2006--Würzburg.
16

Nachweis, Verbreitung und Bedeutung von N-Acyl-L-homoserinlactonen bei Gram-negativen Bakterien

Geisenberger, Otto. January 2000 (has links) (PDF)
München, Techn. Univ., Diss., 2000.
17

The enzymology of cell division in Pseudomonas aeruginosa.

Bhatti, Mohammad Abdul Rashid January 1976 (has links)
No description available.
18

Construction, expression, and purification of a histidine-tailed bacteriophage T4 lysozyme

Sloane, Rhona Patricia January 1996 (has links)
No description available.
19

Use of a random peptide library to identify novel core endotoxin binders

Black, J. M. January 2001 (has links)
No description available.
20

Studies of structure-function relationship of components of multidrug efflux pumps and type I secretion systems / Untersuchungen des Zusammenhangs zwischen Struktur und Funktion von Multidrug Efflux Pumpen und Typ I Sekretionssystemen

Polleichtner, Johann Georg January 2006 (has links) (PDF)
This work deals with channel-tunnel dependent multidrug efflux pumps and type I secretion systems, more concrete with the improved classification of the adaptor protein family, the characterization of the TolC-homologue protein HI1462 of Haemophilus influenzae, and the molecular characterization of the interaction between TolC and AcrA of Escherichia coli. / Diese Arbeit beschäftigt sich mit Channel-Tunnel-abhängigen Multidrug Efflux Pumpen und Typ I Sekretionssystemen, genauer gesagt mit der verbesserten Klassifikation der Familie der Adapter-Proteine, der Charakterisierung des TolC-homologen Proteins HI1462 aus Haemophilus influenzae, und der molekularen Charakterisierung der Interaktion zwischen TolC und AcrA aus Escherichia coli.

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