The phrase "also demonstrated to have" is correct and usable in written English.
It can be used when discussing evidence or findings that support a claim or assertion about something having a particular quality or characteristic.
Example: "The study found that the new drug is effective in treating the disease, and it has also demonstrated to have fewer side effects than the previous treatment."
Alternatives: "also shown to possess" or "also proven to have".
The morphology of the electrospun PES membrane, controlled by different electrospinning flow rates, was also demonstrated to have a substantial impact on adhesion, where a 5-fold increase of the adhesive strength was observed when the flow rate increased from 20 μL/min to 60 μL/min.
Signals from a MoS2@CuNPs SERS substrate were also demonstrated to have interesting advantages over pure CuNPs SERS, in terms of the excellent linear relationship between Raman intensity and analyte concentration, strongly background fluorescence quenching and being more stable against photo-induced damage and oxidation.
Different types of questions are also demonstrated to have an effect on response latency in Bassil and Fletcher (1991) investigation.
In support of this approach, we filmed one of the live performances of That's Just Crazy Talk and produced a DVD version of the show, which was also demonstrated to have a positive impact on stigmatizing attitudes in healthcare providers (Hawke et al. 2013).
The new factors were also demonstrated to have improved homogeneities, satisfactory reliabilities, discriminant and convergent validities, and to differentiate well among the three drug groups.
Moreover, resveratrol was also demonstrated to have effects that may contribute to the protection of β-cells in diabetes.
Hydroxymethylglutaryl-coenzyme A inhibitors (statins), although clinically used as lipid-lowering agents, have also been demonstrated to have anti-inflammatory effects.
In addition, metformin has also been demonstrated to have multiple pleiotropic actions including anti-inflammatory8, immunomodulatory9, anti-cancerous10, cardio-protective and vasculo-protective actions11 and limits the growth of micro-organisms12,13,14.
Surgeon experience has also been demonstrated to have an important role in the outcome of the procedure.
Sex-specific responses to stress have also been demonstrated to have an effect on the hippocampus.
MART-1 has also been demonstrated to have a higher diagnostic accuracy than S-100 and HMB-45 staining [4], [9].
