Incubation

About: Incubation is a research topic. Over the lifetime, 5748 publications have been published within this topic receiving 126541 citations.

Exposure to autoclaving or sodium hydroxide extends the dose-response curve of the 263K strain of scrapie agent in hamsters.

Abstract: An analysis was made of incubation period data from experiments in which samples of brain-tissue infected with the 263K strain of scrapie agent were injected intracerebrally into hamsters following exposure of the tissue to autoclaving or sodium hydroxide. Where there was survival of infectivity, this often produced extended mean incubation periods compared with the maximal incubation periods in controls injected with untreated agent. These results confirmed that, after chemical or physical treatment, infectivity titre should not be calculated by comparing the incubation period from a single dilution-group against a standard dose-response curve for untreated agent.

Some aspects of incubation in the manx shearwater procellaria puffinus, with particular reference to chilling resistance in the embryo

Abstract: Summary. 1. Large-scale excavations and observations during homing experiments provided incidental data on incubation. 2. The main period (median 90%) of egg-laying is from 25 April to 20 May, of hatching from 17 June to 12 July. The median dates for these processes are 6 May and 28 June. The average incubation period is 53 days. 3. Incubation shifts are long (average 5 days) and variable, 2 to 16 days if unrelieved. Temporarily deserted eggs were only found in about 1% of undisturbed nests. 4. Nevertheless many well-developed eggs hatched after being chilled in the burrow for up to 7 days. Others remained viable for up to 13 days in the laboratory. The length of the chilling period and the stage of development at which it occurs have little effect on the proportion surviving. 5. The ecological and evolutionary significance of the faculty is considered, with a brief survey of chilling resistance in the embryos of other birds.

Effects of temperature, plant age, inoculum concentration, and cultivar on the incubation period and severity of bacterial canker of tomato

Abstract: The incubation period and severity of bacterial canker of tomato caused by Clavibacter michiganensis subsp. michiganensis were influenced by temperature, plant age, inoculum concentration, and cultivar. The incubation period was longer and symptom development was less severe with cooler temperatures, older plants, lower concentrations of inocula, and moderately resistant cultivars. The time required before leaves wilted or cankers developed at the edge of inoculated petioles varied from 12 to 34 days, depending on conditions (.)

Mineralization of nitrogen in the presence of a nitrification inhibitor

Abstract: The influence of a nitrification inhibitor, dicyandiamide (DCD). on nitrogen processes was studied by incubation of soil with ammonium sulfate labelled with 15 N. During the early days of the incubation, the amount of nitrate-N was higher in the control than in the treatment with DCD, but after 6 months, there was no significant difference. The decrease in nitric-N attributable to dicyandiamide, resulted from selective inhibition of the nitrification process. Moreover, an increase in the immobilization of the N from the labelled ammonium was observed, while the mineralization of N from the soil organic compartments was of similar magnitude in both treatments.