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Application of Plant-microbe Interactions in Contaminated Agro-ecosystem Management
Published in Vivek Kumar, Rhizomicrobiome Dynamics in Bioremediation, 2021
PCBs, forming a class of organic aromatic compound, are used worldwide for a variety of applications. PCBs accumulating in the soil can be harmful for human and environmental health. It was reported that the biphenyl dioxygenase enzyme, produced by Burkholderia cepaciastrain LB400, C. testosterone B-365, and Rhodococcus globerulus P6 (Barriault et al. 2002) is able to degrade PCBs in presence of oxygen (Ang et al. 2005). Genetically modified strains of Pseudomonas fluorescens F113rifbph and Pseudomonas fluorescens F113:1180 strains positively impacted the degradation capacity of PCBs compared with wildtype rhizospheric bacteria (Brazil et al. 1995, Villacieros et al. 2005). Furthermore, in situ applications using the genetically modified strain Pseudomonas fluorescens F113 : 1180 were successful (Villacieros et al. 2005).
Characterizing the Distribution System: Microbial Issues
Published in Edwin E. Geldreich, Microbial Quality of Water Supply in Distribution Systems, 2020
Sand used as an aggregate in the making of concrete for lining new ductile iron pipe can also be a contaminating source of bacteria. Such was the situation experienced by a midwestern utility after accepting a new pipeline from the contractor. Suddenly there was a large increase in the heterotrophic bacterial population in the water supply passing through the new pipe section. The laboratory reported the predominant organisms were Pseudomonas fluorescens, Ps. maltophilia and Ps. putida. Tracing back through the pipeline construction project provided circumstantial evidence that the contaminate was probably introduced in the sand (the same strains of Pseudomonas were recovered in the sand). The subcontractor supplying the sand resolved the problem by increasing the wash cycle for better removal of silt in the raw material and elevating the sand drying temperature to a range between 180 and 200°F.
Diseases of Tilapia
Published in Hillary S. Egna, Claude E. Boyd, Dynamics of POND Aquaculture, 2017
Kamonporn Tonguthai, Supranee Chinabut
Bacteria of the genus Pseudomonas are ubiquitous in natural freshwaters. Pseudomonad septicemia can occur in single fish or as epizootics. The etiological agents of pseudomonad septicemia are opportunist pathogens belonging to the genus Pseudomonas. Pseudomonas fluorescens, a nonspore-forming, Gram-negative, rod-shaped bacteria, is one example. Pseudomonad septicemia occurs primarily among cultured and aquarium fishes, but occasionally appears among wild fishes. Wu (1970) reported Pseudomonas sp. associated with disease in tilapia, causing a similar syndrome to aeromonad hemorrhagic septicemia.
Fouling Propensity of Modified Heat Transfer Surfaces
Published in Heat Transfer Engineering, 2020
Amir Hossein Nikoo, M. Reza Malayeri, Abdullah Al-Janabi
Similarly, Navabpour et al. [50] studied the biofouling of Pseudomonas fluorescens bacteria on various modified surfaces. In their investigation, H06, H22, H36, and H36-2 coatings had horizontal configuration, whereas V50, Hybrid1, Hybrid2, as well as Hybrid3 were vertically arrayed. To evaluate the biofouling behavior against the FPI criterion, Figure 11 shows the second-order polynomial fitted to the data points which demonstrates how the deposited bacteria would change versus FPI. As expected, the downtrend of fitted curve in Figure 11 confirms that larger FPI values correspond to lower propensity of biofouling.