"effect was indicated" is correct and usable in written English.
You can use it when you need to describe a certain phenomenon and the outcome of an experiment or situation. For example: "The study's results showed that the effect of the new drug was indicated after only one week of use."
The temperature effect was also investigated by many researchers in which a positive effect was indicated when increasing the solution temperature for the catalytic hydrolysis of NaBH4.
The effect of constant light was also explored in that study in the L53 line of mutant mice; a protective effect was indicated although to a much lesser extent than that of the G90D transgene.
Reversibility of effect was indicated by declining IPA values over the 24 h following the last dose (day 28).
The information of flowering time QTL such as physical coordinate, length, and additive effect was indicated by blue (Syn10) and red (Syn4) thick lines.
The effect of concentration (or exposure rate) was strong, and an inverse exposure-rate effect was indicated, that is, ERR/WLM increased with decreasing exposure-rate.
The size of this long-term priming effect was indicated by the posterior (difference bias- and other- effects: M=0.09, CI: [0.06,0.13]).
Forecast uncertainty increases with time, too; this effect is indicated by gradually widening prediction intervals.
Mean effect is indicated with black dot 95% confidence interval with horizontal black lines.
This effect is indicated by a bimodal size distribution in the suspension spray.
Such effect is indicated by the high concentration of ϵ-Fe2 − 3N phase observed in the compound zone.
The YORP effect is indicated to be less efficient in altering asteroid spin rates from our results when compared with the flat distribution found by Pravec et al.
