) During the initial collapse, this pre-main-sequence star generates energy through gravitational contraction.

During a contraction, these muscles contract causing shortening of the upper segment and drawing upwards of the lower segment, in a gradual expulsive motion.

During contraction of the ventricular myocardium ( systole ), the subendocardial coronary vessels ( the vessels that enter the myocardium ) are compressed due to the high intraventricular pressures.

During Margaret Thatcher's contraction of the coal industry, six pits within a two mile ( 3 km ) radius of the city centre were closed between 1979 and 1983.

During vomiting the propulsion of food up the esophagus and out the mouth comes from contraction of the abdominal muscles ; peristalsis does not reverse in the esophagus.

During the 1930s, the U. S. and the rest of the world experienced a severe economic contraction that is now called the Great Depression.

* During accommodation, the parasympathetic nervous system causes constriction of the pupil and contraction of the ciliary muscle to the lens, allowing for closer vision.

During the 1980s, migratory Japanese sardine was one of the most abundant fish in the summer and the main commercial species, but the fishery collapsed and by 1993 no sardines were reported caught leading to significant economic contraction in the few settlements on the islands.

During the nineties, countries like Mexico, Argentina, Malaysia, Turkey, Colombia, Indonesia, Korea and Peru all experienced boom – bust cycles with the consequent collapse in GDP, consumption, non-tradable output sector contraction, capital flow reversals, limited or costly access to capital markets and sharp real exchange rate fluctuations.

During intense muscle contraction the ion pumps that maintain homeostasis of these ions are inactivated and this ( with other ion related disruption ) causes ionic disturbances.

During the ventricular contraction portion of the cardiac cycle, the Purkinje fibers carry the contraction impulse from both the left and right bundle branch to the myocardium of the ventricles.

During the era of route contraction from 1940 to about 1975 the Franklin Avenue Shuttle, as it is now known, seemed a prime candidate for abandonment ; its physical structure had been allowed to deteriorate and its service steadily curtailed.

During the contraction the core becomes hotter and hotter until it causes the outer layers to begin fusing hydrogen and expand outwards initiating the red giant stage.

During ventricular contraction, the wave of depolarization moves from endocardial to epicardial surface.

During this phase, the male urethral sphincter contracts ( so as to prevent urine from mixing with semen, and guard against retrograde ejaculation ) and muscles at the base of the penis begin a steady rhythmic contraction.

During ventricular contraction, or systole, some of the blood from the left ventricle leaks into the right ventricle, passes through the lungs and reenters the left ventricle via the pulmonary veins and left atrium.

During contraction of muscle, rapidly cycling crossbridges form between activated actin and phosphorylated myosin, generating force.

During a concentric contraction, a muscle is stimulated to contract according to the sliding filament mechanism.

During an eccentric contraction, the muscle elongates while under tension due to an opposing force being greater than the force generated by the muscle.

During an eccentric contraction of the biceps muscle, the elbow starts the movement while bent and then straightens as the hand moves away from the shoulder.

During an eccentric contraction of the triceps muscle, the elbow starts the movement straight and then bends as the hand moves towards the shoulder.

During a concentric contraction, muscle fibers slide across each other, pulling the Z-lines together.

During an eccentric contraction, the filaments slide past each other the opposite way, though the actual movement of the myosin heads during an eccentric contraction is not known.

During the hottest part of the day, of course, the sun comes straight down and there isn't any shade ''.

During the decade that followed, the common man, as that piece put it, grew uncomfortable as the Voice of God and fled from behind Saint Woodrow ( Wilson ) only to learn from Science, to his shocked relief that after all there was no God he had to speak for and that he was just an animal anyhow -- that there was a chemical formula for him, and that too much couldn't be expected of him.

During one recent day of driving about Los Angeles there were actually a dozen occasions when oncoming drivers stopped an entire lane of traffic to permit me to pull out of an impossible side street.

During fiscal years 1959 and 1960, there were 139 military and civilian students who came to the Institute for varying periods of special instruction.

During fiscal years 1959 and 1960, there were 795,586 visitors to the Museum.

During much of the year the general level of business activity has moved along on a record-high plateau, but there have been persistent signs of slack in the economy.

During the month of November hardly a day passed when there was not some mention of John Brown in the Rhode Island newspapers.

During the 1950s there were as many as 25,000 schools in the Congo.

During about three and a half months of the year, in the summer, there are three boats that run from the mainland to the Island carrying passengers, food, and cars ; ;

During the 1970s and 1990s, there was an epistemological shift away from the positivist traditions that had largely informed the discipline.

During Christie and Mallowan's time in the Middle East, along with their time spent among the many tombs, temples, and museums, there was also a large amount of time spent traveling to and from Mallowan's sites.

During Darnley ’ s lifetime there was little public knowledge of the urn, and no record of a published photograph exists before 1921.

During each winter there is usually one fall of snow in the south and two in the north ; but the snow quickly disappears, and sometimes, during an entire winter, the ground is not covered with snow.

During the 3rd millennium BC, there developed a very intimate cultural symbiosis between the Sumerians and the Akkadians, which included widespread bilingualism.

During the 3rd millennium BC, there developed a very intimate cultural symbiosis between the Sumerians and the Akkadians, which included widespread bilingualism.

During the 4th century BC, there may well have been some 250, 000 – 300, 000 people in Attica.

During the third millennium BC, there developed a very intimate cultural symbiosis between the Sumerians and the Akkadians, which included widespread bilingualism.

During the Neolithic Revolution, which occurred during the early Holocene, there were at least two aurochs domestication events: one related to the Indian subspecies, leading to Zebu cattle ; the other one related to the Eurasian subspecies, leading to taurine cattle.

During apartheid there was violence between the ANC and the Inkatha Freedom Party.

During the monsoon there are frequent heavy rains and thunderstorms but flooding is not a common occurrence.

During his time at al-Farooq, there is a curious mention under Mushabib al-Hamlan's details that Nami had recently had laser eye surgery, an uncited fact that does not reappear.

During the 18th century there were many innovations in the design of timber bridges by Hans Ulrich, Johannes Grubenmann, and others.

During the time of the Judges when there was a famine, an Israelite family from Bethlehem — Elimelech, his wife Naomi, and their sons Mahlon and Chilion — emigrate to the nearby country of Moab.

During the Exile many Jews were taken to Babylon, where the prophets told them to make their homes (), suggesting they would spend a long period of time there.