Sentence examples for occurred periodically from inspiring English sources
Cyclically changing apnea periods occurred periodically and increased the inter-animal variability in phosgene-exposed rats, but not in normally breathing control rats (Fig. 2).
Seismic exploration has occurred periodically since the 1960's.
Outbreaks occurred periodically in these regions until major immunization programs were instituted after World War II.
Sexual assaults have occurred periodically at public pools in the city, which serve more than a million swimmers a year.
The doctor also looked nervously at the huge cracks in the walls, and thought of the strong tremors that had occurred periodically since the earthquake.
Puritanical revivalist movements calling for a return to the pristine Islam of the Prophet Muhammad have occurred periodically throughout Islamic history.
In this paper, it is of key for us to find that the lengths of positive and negative semi-cycles of nontrivial solutions of (1.1) occur periodically with prime period 15 with the rule,,,,,,, and in a period.
Mainly, the lengths of positive and negative semicycles of its nontrivial solutions are found to occur periodically with prime period 15.
Assuming that, as neutralizing antibodies, IgG antibodies persist several years after infection, this result (and the WNV history in the studied area since 1962) suggest that the Camargue is an epidemic area, with outbreaks that occur periodically and are separated by long silent periods.
Outbreaks of encephalitis occur periodically.
Ebola outbreaks occur periodically in Africa, where the pathogen was first discovered in 1976.
