Two-component signal transduction systems, composed of sensor kinase (SK) and response regulator (RR) proteins, allow bacterial cells to adapt to changes such as environmental flux or the presence of a host. RscS is an SK required for Vibrio fischeri to initiate a symbiotic partnership with the Hawaiian squid Euprymna scolopes, likely due to its role in controlling the symbiosis polysaccharide ...

Microbial symbioses are essential for the normal development and growth of animals. Often, symbionts must be acquired from the environment during each generation, and identification of the relevant symbiotic partner against a myriad of unwanted relationships is a formidable task. Although examples of this specificity are well-documented, the genetic mechanisms governing it are poorly characteri...

<p>This goal of this study was to evaluate the effectiveness a new coagulant extract from pumpkin seeds (PSC) for removing turbidity and organic compounds different natural surface waters. Two design experiment methods, namely central composite (CCD) response methodology (RSM) were used optimize PSC removal matter via chemical oxygen demand (COD) water. The CCD results indicated that more...

This study evaluates the impacts of 16 different leachates plastic-made packaging on marine species trophic levels (bacteria, algae, echinoderms). Standard ecotoxicological endpoints (inhibition bioluminescence, inhibition growth, embryo-toxicity) and alterations ecologically significant parameters (i.e., echinoderms’ body-size) were measured following exposure under pH water conditions: standa...

Most Vibrio fischeri strains isolated from the Euprymna scolopes light organ carry plasmids, often including both a large (>40kb) plasmid, and one or more small (<12kb) plasmids. The large plasmids share homology with pES100, which is the lone plasmid in V. fischeri type strain ES114. pES100 appears to encode a conjugative system similar to that on plasmid R721. The small plasmids lack extensiv...