The phrase "a gap was observed" is correct and usable in written English.
It can be used in contexts where you are reporting findings or observations, particularly in research or analysis.
Example: "During the study, a gap was observed in the data that required further investigation."
Alternatives: "a gap was noted" or "a gap was detected".
In addition, a transport gap was observed in our graphene structures at the gate voltage close to the Dirac point.
A similar gap was observed between 07:20 and 08 15 UT, when frequencies decreased from 10 kHz to ~ 500 Hz.
Therefore, a large gap was observed between the compensation granted to kindergarten teachers and that offered to primary and secondary school teachers, which has further aggravated the phenomenon that kindergarten teachers in China tend to possess lower qualifications and salaries (Li 2014).
A clear gap was observed at the CL14-CL34 junctionsome some fibers, suggesting the presence of other sequences at the junction between the two repeat arrays.
Furthermore a significant gap was observed between the risk perception of the experts practising risk assessment on the one hand, and the public on the other hand [ 4].
In this analysis of the KAP of Chinese parents of children with asthma, a wide gap was observed between recommended and actual practices, and their overall asthma-related knowledge was insufficient.
Whereas many markers were assembled into a cluster, a 13.5 cM gap was observed between markers GBS08992 and GBS10863, which are located in the central region of the short arm of chromosome 1A.
A maximum gender gap was observed in 2007 at a level of 37%, while a minimum difference of 26% was found in 2013, as seen in Fig. 2. Fig. 2 Standardised mortality rate per 100,000 inhabitants for cerebrovascular diseases according to the sexes in the Slovak Republic from 1996 to 2013.
Although not significant, a small gender gap was observed, where higher point estimates for the background disability rates were observed among women.
