The phrase "this is speculated to be" is grammatically correct and can be used in written English.
It is typically used to express uncertainty or speculation about a particular statement or situation. Example: This painting is speculated to be worth millions of dollars, but without proper authentication, its true value remains unknown.
This was speculated to be due to the fact that many HNC members were old, and did not appreciate the generals' negativity towards seniors.
This was speculated to be due to a cis-acting element in A1 ensuring lifelong activation by the SOX trio.
This was speculated to be of advantage in the hybridization of unmapped sequences spotted on arrays and to enable higher temperature cDNA synthesis that would enhance sequence specificity.
There is also evidence that mouse models expressing both mutant amyloid precursor protein or Presenilin 1 have some tau present along the vasculature [ 13, 75], but this was speculated to be a consequence of Aß deposition rather than a pathophysiological function of tau.
This phenomenon is speculated to be caused by too long deposition time which results in excess Ag2S nanoparticles generated on TiO2 NRs, consequently decreases effective electron injection and increases recombination rate.
This gene is speculated to be the human analog to the mouse MRF, a protein which has been shown to be critical for oligodendrocyte maturation and myelin production [33].
This discovery is speculated to be attributable to the change in relative helicase activities under the two conditions.
This shortcoming is speculated to be the reason why children with disabilites are often detected late when dysfunctions or inefficient movement behaviour have already emerged [ 13].
In this way, MST is speculated to be suitable for seismo-turbidite analysis; however, the sedimentological information in previous studies is limited.
