The phrase "a decrease in psi" is correct and usable in written English.
It can be used in contexts related to measurements, pressure, or scientific discussions where psi (pounds per square inch) is relevant.
Example: "The experiment showed a significant decrease in psi, indicating a drop in pressure within the system."
Alternatives: "a reduction in psi" or "a drop in psi".
By comparison with low light-grown pdx1 plants, the profile obtained with high-light treated pdx1 at this detergent concentration confirmed that the effects of high light were drastic in the mutant, with a strong decrease in PSI-LHCI and PSII antenna size and an increase in the level of free pigments (Fig. 10B).
Furthermore, the PCM's ability to classify folds was found to be heavily dependent on the target-template pairwise sequence identity (PSI), with an exponential decrease in classification accuracy with decrease in PSI (Figure 4B).
However, when the fixed RNase A was incubated at 65°C and 5,000 to 40,000 psi, there was a decrease in the rate of cross-link reversal, with only 36 40% of the total protein migrating as the monomeric species (Figure 4).
In Populus euphratica, heat stress causes a decrease in PSII abundance and an increase of Photosystem I (PSI); it also induces photosynthetic linear electron flow [ 4].
As a result, the estimated accuracies of PSI frames are different from those of SI frames and lead to a decrease in compression performance.
Hence, the decrease in the FFT amplitude could be explained by a decrease in the refractive index contrast at the pSi/polyNIPAM interface, which is based on the different refractive indices of the swollen (RI ~ 1.33) and collapsed polyNIPAM spheres (RI ~ 1.40) [26].
Although we have no direct evidence for such a decrease in π in our standard GdnHCl curing experiments, in an earlier study we showed that applying α-factor to [PSI+] cells resulted in an apparent reduction in π [20].
