That remained the state of affairs until the late 1960s when Harald Loe ( at the time a professor at the Royal Dental College in Aarhus, Denmark ) demonstrated that a chlorhexidine compound could prevent the build-up of dental plaque.

Farming of abalone began in the late 1950s and early 1960s in Japan and China.

Collins decided to record it in the late 1960s amid an atmosphere of counterculture introspection ; she was part of an encounter group that ended a contentious meeting by singing " Amazing Grace " as it was the only song to which all the members knew the words.

The last of the Ainu households disappeared in the late 1960s, when Yamanaka Kitaro committed suicide after the death of his wife.

His attitude towards conjectures was that one should not dignify a guess as a conjecture lightly, and in the Taniyama case, the evidence was only there after extensive computational work carried out from the late 1960s.

By the late 1960s he had started to become interested in scientific areas outside of mathematics.

From the late 1940s to the early 1960s, following the creation of the state of Israel, most of these Jews fled their countries of birth and are now mostly concentrated in Israel.

One story is that The Rolling Stones went to stay at Korner's house late one night, in the early 1960s, after a performance.

Although he himself was a blues purist, Korner criticised better-known British blues musicians during the blues boom of the late 1960s for their blind adherence to Chicago blues, as if the music came in no other form.

This practice was particularly popular in the late 1960s.

However, the late 1950s and early 1960s saw the onset of a lasting transformation of the city by the tourist industry.

The local economy is based upon tourism directed to the beaches of the Costa Blanca and particularly the second residence construction boom which started in the 1960s and reinvigorated again by the late 1990s.

From the late 1820s until the mid 1960s, Arapawa Island was a base for whaling in the Sounds.

The region was a major producer of raw opium ( hence the name Afyon ) until the late 1960s when under international pressure, from the USA in particular, the fields were burnt and production ceased.

Remains of the walls of this fort were discovered west of the castle when excavating the foundations for a new post office and telephone exchange building in the late 1960s.

By the late 1960s, the area of LAFTA had a population of 220 million and produced about $ 90 billion of goods and services annually.

Throughout the late 1950s and into the 1960s, the United States and the Soviet Union had been developing a series of missile systems with the ability to shoot down incoming ICBM warheads.

* About 50 people in Vernon, Florida collected insurance claims for loss-of-limb accidents in the late 1950s and early 1960s ; this was more than two-thirds of all such claims in the United States during that time.

He changed his surname from Einstein ( to avoid confusion with the famous physicist ) and began a comedy career that quickly made him a regular on variety and talk shows during the late 1960s and early 1970s.

A standardized form of the Basque language, called Euskara Batua, was developed by the Basque Language Academy in the late 1960s.

In the late 1960s and early 1970s, Thackeray built the party by forming temporary alliances with nearly all of Maharashtra's political parties.

However, in the late 1950s and early 1960s, base-stealing was brought back to prominence primarily by Luis Aparicio and Maury Wills, who broke Cobb's modern single-season record by stealing 104 bases in 1962.

During the late 1960s, the Baseball Players Union became much stronger and conflicts between owners and the players ' union led to major work stoppages in 1972, 1981, and 1994.

The BASIC language was also central to the HP Time-Shared BASIC system in the late 1960s and early 1970s, and the Pick operating system.

Following a brief modeling career in the late 1960s, Berenson became a freelance photographer.

In the late 19th century, hostilities broke out between the Shona inhabitants of Botswana and Ndebele tribes who were migrating into the territory from the Kalahari Desert.

Although they arrived too late to engage in hostilities, the action won Morocco goodwill among other Arab states.

While hostilities continued until another two years into 843, the Treaty of Verdun ending the war shaped and influences history in Europe even to this late modern date.

However, limited hostilities renewed in late 2005 and the conflict began to escalate until the government launched a number of major military offensives against the LTTE beginning in July 2006, driving the LTTE out of the entire Eastern province of the island.

The Mongols then resumed attacks on the Tatars to avenge the death of their late khan, opening a long period of active hostilities.

Peng had quietly opposed the operation since its beginning, and began to gradually end hostilities after the PLA encountered serious difficulties, announcing a series of intermittent ceasefires before eventually halting the campaign in late October.

In the late 1930s, in anticipation of the potential hostilities that would become the Second World War, the British government started a rearmament programme, and as part of this, " shadow factories " were built.

He and Randy Savage renewed hostilities when Savage arrived in WCW late in 1994, and their feud continued off and on for almost two years with each wrestler winning the WCW World Championship from each other at different times.

When hostilities ceased the ARRL successfully lobbied Congress to reauthorize Amateur Radio and in late 1945 the bands began to reopen.

Despite the opening of hostilities with the Battles of Lexington and Concord on April 19 ( after which numerous New Hampshire militia went south to join the Siege of Boston ), Wentworth convened the provincial assembly in late May.

The reason for this late date is that President Harry S. Truman did not declare an official end of hostilities until the last day of 1946.

It was also reported that the SNO in Beslan was used by Ossetian nationalist militia forces as an internment camp for ethnic Ingush civilians in late 1992 during the short but bloody Ingush – Ossetian East Prigorodny conflict, in which hundreds of Ingush residents of North Ossetia lost their lives or disappeared during the week-long hostilities, and thus the school was arguably chosen as the target of the attack by the mostly Ingush rebel group because of this connection.

In late 1978 Sino-Soviet split developed into armed hostilities in South-East Asia as war broke out between Vietnam and Kampuchea, two countries that supported CPT.

The Apache Wars were a series of armed conflicts between the United States and Apaches fought in the Southwest from 1849 to 1886, though other minor hostilities continued until as late as 1924.

In 1876 the new tunnel under Bergen Hill opened, after hostilities including a frog war in late 1870 and early 1871, caused by the M & E's attempts to modify the connection between their Boonton Branch, a newer freight bypass, and the Erie tunnel.

Mizoguchi is bitterly disappointed by the end of hostilities, and late at night he climbs the hill behind the temple, Okitayama-Fudosan, looks down on the lights of Kyoto, and pronounces a curse: " Let the darkness of my heart [...] equal the darkness of the night which encloses those countless lights!

Since the cessation of hostilities in late 2006, the numbers of " night commuters " has significantly reduced.

The end of expensive hostilities and the rebound in trade after Napoleon's fall led to an expansion in the bullion reserves held by the Bank of England, from a low of under 4 million pounds in 1821 to 14 million pounds by late 1824.