Bacteria viability

Ferrer, M.L., Garcia-Carvajal, Z.Y., Yuste, L., Rojo, F. and Del Monte, F. (2006) Bacteria viability in sol-gel materials revisited Cryo-SEM as... 

L. FojL L. StraSak, V. Vetterl. Extremely-low frequency magnetic field effects on sulphate reducing bacteria viability. Electromagnetic Biology and Medicine, Vol. 29, pp. 1-9, 2010. 

Rault, A. Beal, C. Ghorbal, S. Ogier, J. Bouix, M. Multiparametric flow cytometry allows rapid assessment and comparison of lactic acid bacteria viability after freezing and during frozen storage. Cryobiology 2007,55, 35-43. 

C. E. Zobell and F. H. Johnson. The influence of hydrostatic pressure on the growth and viability of terestrial and marine bacteria. JBacterial Bioeng, (57) 1979, 1949. 

Nassif, N., Coiffier, A., Coradin, T., Roux, C., Livage, J. and Bouvet, O. (2003) Viability of bacteria in hybrid aqueous silica gels. Journal of Sol-Gel Science and Technology, 26, 1141—1144. 

There is a consequence for space travel and planetary exploration associated with the viability of bacteria in space. Survival times of a few years would enable spacecraft to take bacteria from Earth to a target planet such as Mars. The two... 

Lipid A having Kdo attached at 0-6 comprises a domain of LPS that exhibits a remarkable structural conservatism, as far as the principal architecture is concerned (Fig. 15). This type of structure is found in most Gramnegative bacteria. It is not present in other biomolecules and is thus unique to Gram-negative bacteria and their LPS. It contains those structures that are required for (/) bacterial viability and (//) for optimal expression of endotoxic activity. 

Experiments by Peter Elsbach and colleagues in the 1970s showed that although E. coli lost viability very quickly after incubation with neutrophils, these non-viable organisms still retained several important biochemical functions, such as membrane transport and macromolecular biosynthesis. As these functions are associated with the inner plasma membrane of the bacteria, these observations suggested that the lethal hit on E. coli by neutrophils occurred on the outer membrane. Because disrupted neutrophils also affected the bacteria in this way, it was concluded that the process was independent of the respiratory burst hence these workers investigated the granule proteins for the source of this activity (reviewed in Elsbach Weiss, 1983). 

The phyllosphere (or aerial) parts of plants represent a challenge for the survival of microbes. The exposure to high doses of UV, fluctuations in temperature, and relative humidity all compromise viability (Heaton and Jones, 2008 Whipps et ah, 2008). Bacteria (epiphytes) that exist within the phyllosphere have evolved specialized mechanisms to improve stress tolerance and nutrient acquisition. Pseudomonas spp. form the predominant bacterial population recovered on the leaves of plants (Brandi and Amundson, 2008 Lindow and Brandi, 2003). Epiphytic pseudomonad s produce fluorescent or pigmented compounds that afford protection to UV. 

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