The phrase "activity has been described" is correct and usable in written English.
It can be used when referring to a previously mentioned or documented activity in a report, study, or discussion.
Example: "In the previous section, the activity has been described in detail, highlighting its significance and outcomes."
Alternatives: "the activity has been outlined" or "the activity has been detailed".
Stretch-activated ion channel activity has been described in patch-clamp analysis of C. albicans membranes, but the ion selectivity of these channels is not known [6].
Pro-MMP-2 may be converted to the active form during the infiltration process in malignancy; intense gelatinolytic activity has been described as necessary for malignant transformation [ 44].
Autofluorescence of PIC lesions in correlation with activity has been described [4].
The structuring of pedagogic activity has been described in Rose 2004, 2014, Martin 2006a, Martin and Rose 2007a, 2007b.
Recently, the occurrence of environmental contaminants with androgenic activity has been described from pulp and paper mill effluents and beef feedlot discharges.
A validation activity has been described, and a test case shows how to apply the proposed approach for the design of a new efficient product with an A-class Energy EffIndexcy Index.
This type of "mirror" activity has been described previously (ScienceNOW 23 February , 2005, and many researchers view it as a neural mechanism for interpreting the actions of other people by recreating them in one's own brain.
Although the ability of A. niger to produce high-level FFases with transfructosylation activity has been described (Hidaka et al. 1988; Wang and Zhou 2006; Yanai et al. 2001), the species A. tubingensis has not been reported to be a FFase producer.
Furthermore, epigenetically regulated expression of miRNA genes associated with oncogenic activity has been described for some miRNAs [18], [73], [74].
Constitutive activity has been described for many wildtype GPCRs coupled to Gs-, Gi and Gq-proteins (reviewed in [32]).
This procedure for finding repeats of intracellular activity has been described in Ikegaya et al. (2004) [7] as well as Mokeichev et al. (2007) [24].
