The phrase "also shown that certain" is correct and usable in written English.
It can be used when discussing findings or evidence in research or analysis that indicate specific conditions or results.
Example: "The study has also shown that certain factors contribute significantly to the overall outcome."
Alternatives: "also demonstrated that specific" or "also indicated that particular".
Studies have also shown that certain so-called good bacteria are more common in patients who respond to both chemotherapy and new immunotherapy cancer treatments.
Recently, a few studies have also shown that certain characteristics of businesses that are bought in acquisitions or sold in divestitures also affect the performance of the companies that acquire or divest them.
It was also shown that certain equipment, such as sudden or gradual contractions or expansions, can induce a flow disturbance and thus affect spore removal from the surface of elements.
It has been also shown that certain blood factors can interact with adenovirus [17], [18].
However, it was also shown that certain tumor cells display remarkable plasticity when placed in appropriate environments (for review, [40], [41].
Recent studies with synthetic DNA fragments have also shown that certain oligonucleotide sequences containing TA steps function in conferring high nucleosome affinity and positioning activity in vitro and the two major experimentally identified core elements in this group are the tetranucleotides CTAG and the related sequence TTAA [36], [37].
They also show that certain non-acoustical factors have an impact on annoyance felt.
However, these studies also show that certain mapping methods are less effective for detecting AF sources than others.
The Webb report may also show that certain directors violated their duty of care, which requires them to make thoughtful and informed decisions.
The EIS analysis also showed that certain new cells displayed an unusually high electrode capacitance and resistance when compared to the other cell types.
The results also show that certain elements of the supplier integration process are more likely to be employed under conditions of technology uncertainty, leading to significant improvements in cost, quality, and cycle time objectives.
