Attempts to increase measurement sensitivity and shorten incubation times by reducing the headspace thickness to 1 2 cm generally cause denitrification to be underestimated by 3 13% for gas headspaces, and up to 80% for water headspaces.
By contrast, cortical tissue treated with ascorbic acid or hypotaurine, or aged for several hours prior to exposure to 1-MCP, showed reduced consumption of headspace 1-MCP and high accumulation of internal gaseous 1-MCP.
After training for 10-20 minutes a day for 10-30 days, Headspace users reduced their mind-wandering, boosted their positive emotions, reduced their symptoms of depression, and became kinder and less aggressive compared to other app users.
When the length of the measurement period was increased, the underestimation increased due to the rising concentration within the chamber headspace, which reduced the diffusion gradient within the soil.
To minimise the chances of this happening, samples were diluted prior to analysis, thereby reducing the analyte headspace concentrations.
For the analysis of ethanol, the headspace sampling flow rate was also reduced.
Alternatively, floral volatiles may also interfere with attractive HIPVs in the headspace and reduce their attractiveness to parasitoids.
This would imply that H2 accumulation within bioreactors increases H2 partial pressure in the headspace, while reducing H2 biosynthetic rates to eventually cease any net hydrogenase bioproduction activity.
Many foods are dispersed systems containing both aqueous and lipid phases, and the effect of lipids content on flavor release will reduce the concentration of headspace volatiles, but removal of lipids in low-fat foods may also result in increased release.
Pure and mixed cultures were grown in 60 mL serum bottles containing 40 mL reduced, defined mineral salts medium with 5 mM acetate serving as both carbon source and electron donor with an N2-CO2 (80:20, vol/vol) headspace [ 16].
Therefore, it is necessary to reduce the oxygen content in the headspace of the package.
