The phrase "a pattern has been observed" is correct and usable in written English.
It can be used when discussing findings or results in research, analysis, or observations in various fields.
Example: "In our study, a pattern has been observed indicating a correlation between sleep quality and productivity levels."
Alternatives: "a trend has been noted" or "a pattern has emerged."
Such a pattern has been observed in other reports.
Such a pattern has been observed in a network of New York IDUs (28).
In the present study we wanted to examine whether selective forces would leave a base compositional pattern in the core genomes of bacterial strains undergoing genome expansion, mediated through HGT, since such a pattern has been observed for microbial species undergoing genome reduction [ 3, 13].
In orthostatic blood pressure dysregulation a similar pattern has been observed: a sympathetic hyperactivity associated with reduced variability of the parasympathetic nervous system [ 32].
A similar pattern has been observed in a polymorphic isopod.
In Citrus, in addition to containing low densities of genes, the centromeric and pericentromeric areas are characterised by a high frequency of retrotransposon DNA [ 32]; a similar pattern has been observed in wheat [ 83].
A similar pattern has been observed elsewhere; woodrats feeding on a novel diet (i.e., animals naïve to the diet) expressed relatively few biotransformation transcripts and more transcripts related to cellular function compared to feeding on their native diet [ 33].
A similar pattern has been observed in trace amine-associated receptor (TAAR) genes, a second class of chemosensory receptors that are expressed in the olfactory epithelium [ 57- 59].
A different pattern has been observed in Zn-polluted soils: no changes in soil biodiversity, an increase in biological activity and a significant decrease of Zn toxicity on C. elegans growth were observed after aged nZVI exposure.
A similar pattern has been observed in other developing regions such as Latin America.
No single cause has yet been found, but various mechanisms have been proposed, and a seasonal pattern has been observed.
