"had marginal effect" is correct and usable in written English.
You can use it to describe an action which had minimal, or minimalistic, results. For example: "The new policies introduced by the government had marginal effect on poverty levels."
However, the binder materials type, age, aggregate size and test specimen shape had marginal effect on the strength porosity relationship.
Thus, it becomes evident that curing had marginal effect on the properties of the concrete rather it is dependent mainly on the properties of the aggregate.
They also found that the type of cement had marginal effect on the strength of pervious concrete having the same void content.
Knockdown of DR6 by shRNA-1 or shRNA-2 significantly reduced IFN-α production in response to CpG-ODN (Figs. 2B, 2D, S2A and S2B), while it had marginal effect on IL-6 production (Fig. 2C and 2E).
While excluding patients having second-line treatment from RFS and DSS analysis had marginal effect on the results (data not shown), patients in need for second-line treatment are in general, expected to have a particular poor prognosis; thus, the possibility exist that these patients may have contributed to a different outcome in case they had not receive salvage therapy.
Treatment with heparin or HS-degrading enzyme resulted in a substantial decrease in plaque formation by YN87448, XJ-160/E2, and XJ-160/E1E2, but had marginal effect on XJ-160 and XJ-160/E1 XJ-160/E1ng that E2 glycoprotein from YN87448 playsuggestingmporthat rolE2than does E1 in mediatinglycoproteinS-related cell infromion.
Furthermore, salinity had marginal effects (P = 0.078) on soil beta diversity.
Non-tilting oscillations had marginal effects on the packed bed hydrodynamics which remained practically similar to the one prevailing in stationary vertical trickle beds.
Among the variables, in general, the effect of pineapple juice > glucono-δ-lactone (GDL) > sodium alginate > temperature while other variables had marginal effects.
Seeding increased total native species richness as expected, but had marginal effects on forb cover and no effect on graminoid cover.
These additional steps had marginal effects on amplification efficiency across a range of input concentrations (Figure S5).
