"during his study" is a valid and usable phrase in written English.
It is typically used when talking about a period of time that someone spent on a task or activity. For example, "John worked hard during his study at the university."
Choose a scientist that performed an important role in this field and write a series of fictionalized diary entries from his perspective during his study of regeneration.
While visiting friends in Baltimore during his study year, he watched television coverage of Iraqi Scud missiles falling on Tel Aviv.
CHARLIE'S KITCHEN It turns out Mr. Clinton wasn't the only recent president to search out a good burger and cheap beer during his study breaks.
At one point during his study, on July 19, he noticed that every affiliate had simultaneously shifted to a new logo with the same stylized Arabic script.
Chowdhury et al. (2012a) reported the presence of diazinon at the concentration of 0.9 μg/L in Savar but was not detected in Dhamrai during his study.
Inequality (1.4) is called Ou-Iang's inequality, which was established by Ou-Iang during his study of the boundedness of certain kinds of second-order differential equations.
Gay-Lussac proved to be an exemplary student during his studies there from 1797 to 1800.
He had already worked in the city, during his studies, with the design collective threeASFOUR.
He discovered this during his studies of the ommatidia of the horseshoe crab Limulus.
Doufish graduated as an electrical engineer from Birzeit University, near Ramallah, but during his studies decided to teach himself how to program in order to broaden his employment options.
His style was also influenced by Francesco Imperiali and Francesco Solimena during his studies in Italy in 1736 38.
