The phrase "decline upon" is not correct and is not commonly used in written English.
It seems to be a misinterpretation of "decline to" or "decline on."
Example: "I must decline upon your invitation to the event."
Alternatives: "decline to accept" or "refuse to".
Fungus – the word suggests poisonous, morbid growths on the decaying vegetation of summer: pallid, unhealthy-looking organisms flourishing in the season of decline upon the death of others.
Were the shares publicly traded, their trading value would almost certainly decline upon issuance, since every dollar invested buys, at most, 88 cents of assets.
However, the duration of each deposition stage went into decline upon the increase of the Ag+ ions number.
During osteogenesis, a dynamic change was revealed by qRT-PCR, with an initial decline upon induction, followed by a subsequent increase (Chen et al., 2008a).
Additionally, the in vitro digestibility of proteins in tree locust has been shown to decline upon toasting and boiling, as the tannin and phytate content increased as a result of these treatments.
As such, the mass activity of the Pd@Pt2−3L/C catalyst kept increasing up to 10,000 cycles of repeated sweeping and then started to decline upon further cycling.
Remember, these are declines upon declines.
Prednisolone release initially followed Higuchi's equation and declined upon reducing total monomer PG concentration.
To put it another way, the baby boomers experienced larger earnings declines upon their mandatory retirement and reemployment.
The stiffness of all samples declined upon prolonged incubation in medium, especially for samples prepared by diffusion.
Previous studies have suggested that anti-RR titer increases throughout the duration of therapy, but declines upon cessation of treatment [11, 12, 15, 31].
