Decay spores

Decay spores are almost universally present. Given the presence of wood, suflScient moisture and air, a tolerable temperature, enough time, and the absence of substances toxic to the decay organism, decay will surely begin and proceed to the total destruction of the wood available. Therefore, there are few truly ancient or archaeological wooden artifacts, and the problems involved in gluing them may often be as much academic as real. 

Warscheid, B. Fenselau, C. Characterization of Bacillus spores species and their mixtures using possource decay with a curved-field reflectron. Anal. Chem. 2003, 75, 5618-5627. 

A range of troublesome soil-dwelling fungal diseases. Some survive on decaying plant debris, others exist as spores in the soil. They multiply rapidly in cool, wet, poorly ventilated situations. 

Spores of this fungal disease are released into the soil from the decaying roots of infected plants. 

The pathogens (103 to 104 spores mL 1) caused significant shoot growth inhibition within 25 to 30 h and seedling death within 40 to 50 h. Stem collapse time, as a function of various spore concentrations, was also a useful bioassay parameter. Nonlinear regression analysis86 was used to model stem collapse time as a function of spore concentration (Fig. 16.2, solid lines). The trend used for this model was an exponential decay model of the form ... 

Effects of different C. truncatum and A. cassiae spore concentrations on seedling stem collapse bioassay of hemp sesbania and sicklepod, respectively. Solid lines for each data set = predicted trends for C. truncatum/hemp sesbania and for A. cass/ ae/sicklepod interactions, respectively, based on the exponential decay model described in the text. Triangles = recorded values and closed circles = recorded values for A. cass/ ae/sicklepod and C. truncatum/hemp sesbania, respectively. (From Hoagland, R. E. 1995, Biocontrol Sci. Techno ., 5, 251-259. With permission.)... 

In contrast to sterilization, the aim of disinfection techniques is to reduce the number of pathogenic bacteria, viruses, protozoa and spores by inactivation, so that the infectivity of the material is reduced drastically. During disinfection processes, the inactivation of microorganisms follows an exponential decay according to Eq. 9-1. 

Newell, S. Y. (2001b). Spore-expulsion rates and extents of blade occupation by ascomycetes of the smooth cordgrass standing decay system. Botanica Marina, 44, 277—85. 

Avoid cutting grass in late summer when mould spores are present in decaying vegetation... 

A layer of spore-bearing structures typically found in polypores such as the bracket fungi growing on decaying wood. 

Marquez et al. (1997) showed that a given treatment time was more effective when the time between pulses was extended. They treated Bacillus cereus spores with 50 exponential decay pulses lasting 2 j,s, at an EF intensity of 35kV cm . Reductions of 1.2 and 2.1 log cycles were obtained when 2-3 or 5-6 s were used between pnlses, respectively. The results obtained were in part attribntable to the pulse polarity. 

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