During the period from 1 July 1960 through 31 January 1961, additional research affiliations were effected with the U. S. Army Medical Research and Development Command to conduct research in procedures for quantitative electron microscopy, and for the study of biophysical and biological studies of the structure and function of ocular tissue.

During this study septic conditions developed in the oxidation pond in the spring when the ice melted.

During this time Thomas Aquinas began to study under Albertus.

During the civil war following the death of Eric III of Denmark in 1146, Absalon travelled abroad to study theology in Paris, while Esbern fought for Valdemar's ascension to the throne.

During the 19th century, the fields of science and art became increasingly intertwined as scientists such as Michael Faraday began to study the damaging effects of the environment to works of art.

During the past few centuries of detailed, scientific study of the Bronze Age, it has become clear that on the whole, the use of copper or bronze was only the most stable and therefore the most diagnostic part of a cluster of features marking the period.

During the 1993 policy debate, the National Defense Research Institute prepared a study for the Office of the Secretary of Defense published as Sexual Orientation and U. S. Military Personnel Policy: Options and Assessment.

During the middle of the century, the study of normative ethics declined as meta-ethics grew in prominence.

During these years, the study of electricity was largely considered to be a subfield of physics.

During the Great Depression the organization conducted an Eight Year study evaluating the effects of progressive programs.

During the period of Crick's study of X-ray diffraction, researchers in the Cambridge lab were attempting to determine the most stable helical conformation of amino acid chains in proteins ( the α helix ).

During the classical period in Greece ( 6th, 5th and 4th centuries BCE ) and in Hellenistic times, natural philosophy slowly developed into an exciting and contentious field of study.

During the 1970s and 1980s, second-wave feminists saw the study of history as a male-dominated intellectual enterprise and presented " herstory " as a means of compensation.

During this period, he seems to have found time for study and writing.

During this time, he continued to study the scholars of the Fabian Society including Beatrice Webb.

During medieval times, when learning came under the purview of the Church, these subjects ( called the Trivium ) were extended to include mathematics, geometry, music, and astronomy ( which included the study of astrology ).

During the 1990s, Gell-Mann's interest turned to the emerging study of complexity.

During the Middle Ages, the study of politics was widespread in the churches and courts.

During this period, Gosse made a special study of sea anemone ( Actiniae ) and in 1860 published Actinologia Britannica.

During this period he studied under, among others, Alexander Winkler, Anatoly Lyadov, Nikolai Tcherepnin and Nikolai Rimsky-Korsakov ( though when Rimsky-Korsakov died in 1908, Prokofiev noted that he had only studied orchestration with him ' after a fashion ' – that is, he was just one of many students in a heavily attended class — and regretted that he otherwise ' never had the opportunity to study with him ').

During the 15th and 16th centuries, a new intensive form of Talmud study arose.

During the occupation, Koreans who were able to study and receive rankings in Japan were exposed to Japanese martial arts.

During the High Middle Ages, theology was therefore the ultimate subject at universities, being named " The Queen of the Sciences " and serving as the capstone to the Trivium and Quadrivium that young men were expected to study.

During his 20s, Herbert Marcuse was a student in Freiburg, where he went to study under Martin Heidegger, one of Germany's most prominent philosophers.

During the War of the Spanish Succession Alberoni laid the foundation of his political success by the services he rendered to Louis-Joseph, duc de Vendôme, commander of the French forces in Italy, to whom the duke of Parma had sent him.

During the previous pontificate the Jesuits had been expelled from Portugal and from all the Bourbon courts: France, Spain, Naples, and Parma ; now the general suppression of the order was urged by the faction called the " court cardinals ", who were opposed by the diminished pro-Jesuit faction, the Zelanti (" zealous "), who were generally opposed to the encroaching secularism of the Enlightenment.

During the Middle Ages, Parma became an important stage of the Via Francigena, the main road connecting Rome to Northern Europe ; several castles, hospitals and inns were built in the following centuries to host the increasing number of pilgrims who passed by Parma and Fidenza, following the Apennines via Collecchio, Berceto and the Corchia ranges before descending the Passo della Cisa into Tuscany, heading finally south toward Rome.

During the Napoleonic Wars ( 1802 – 1814 ), Parma was part of the Taro Département.

During World War II, Parma was a strong centre of partisan resistance.

During the European sovereign-debt crisis, after incurring a € 900 million debt, the people of Parma voted in a direct democratic platform.

During the interregnum that followed, Ottavio again tried to induce the governor of Parma to give up the city to him, but met with no better success ; however, on the election of Giovanni Maria Giocchi to the papacy as Julius III, the duchy was conferred on him in 1551.

During the 16th century, Tournai was a bulwark of Calvinism, but eventually it was conquered by the Spanish governor of the Low Countries, the Duke of Parma, following a prolonged siege in 1581.

During the 1740s Jommelli wrote operas for many Italian cities: Bologna, Venice, Turin, Padua, Ferrara, Lucca, Parma, along with Naples and Rome.

During 1860 and 1861 " Sardinian " stamps supplanted those in use in each of the territories that joined Italy, with Modena, Parma, and Romagna changing over on 1 February 1860, and Naples not converting until 15 September 1862 ( although the local authorities had earlier printed stamps featuring the arms of Savoy ).

During the 1249 siege of Parma, the Imperial camp was assaulted and taken, and in the ensuing Battle of Parma the Imperial side was routed.

During a stay in Parma, where he studied with Giuseppe Corso detto Celano, he formed his sacred music style ; most of his psalm settings of the 1680s and 1690s show the influence of Corso.

During the Armada crisis, he was on a diplomatic mission to Alexander Farnese, Duke of Parma.

During his first spell a Parma, Asprilla scored 25 goals in 84 Serie A appearances.

During an 18-year career, he played professionally for six clubs, including Parma, Atlético Mineiro and Galatasaray.

During the recapture of Flanders and Brabant, Parma improved the logistics of the Spanish army in Flanders by further investing in what is dubbed the " Spanish Route.

During the Eighty Years ' War and especially after 1585, the sack of Antwerp, and the successes of the Duke of Parma in the 1580s between 100, 000 and 200, 000 of Brabantish and Flemish Calvinist ( and other ) refugees and emigrants settled in the cities of Holland proper, which had the result of creating a mixture of their Dutch with the Dutch of the residents before this immigration.

During an attack on Parma, Norreys received a pike wound in the breast, then managed to break through to relieve Grave, the last barrier to the Spanish advance into the north ; Leicester knighted him for this victory during a great feast at Utrecht on St George's Day, along with his brothers Edward and Henry.