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.

Communal tensions arose again in the late 1970s, fueled by Sikh claims of discrimination and marginalisation by the Hindu dominated Indian National Congress ruling party and the " dictatorial " tactics adopted by the then Indian Prime Minister, Indira Gandhi.

In 1999, the USDA settled a class action lawsuit ( Pigford v. Glickman ) alleging discrimination against African-American farmers in the late twentieth century.

The Learning Tree is a 1969 drama film which tells the story of a young African American growing up in rural Kansas during the late 1920s and early 1930s, when racial discrimination was a social norm and legally sanctioned in parts of the United States.

In Portuguese-speaking Latin America ( i. e., Brazil ), a milder form of caste system existed, although it also provided for legal and social discrimination among individuals belonging to different races, since slavery for blacks existed until the late 19th century.

Such research has been ongoing since the late 1970s, and includes the specific topics of: acoustic mimicry, behavioral mimicry ( inter-and intra-specific ), comprehension of novel sequences in an artificial language ( including non-finite state grammars as well as novel anomalous sequences ), memory, monitoring of self-behaviors ( including reporting on these, as well as avoiding or repeating them ), reporting on the presence and absence of objects, object categorization, discrimination and matching ( identity matching to sample, delayed matching to sample, arbitrary matching to sample, matching across echolocation and vision, reporting that no identity match exists, etc.

Charter 77 protested discrimination in educational admissions based on parents ' political activity ; there was some indication by the late 1970s that, if parental sins could still be visited on the children, at least questions concerning their parents ' past and present political affiliations would be less blatant.

Employment discrimination against women began to be taken more seriously in the late 1960s.

Bozcaada remained majority Greek till the late 1960s and early 1970s, when many Greeks emigrated because of systemic discrimination and better opportunities elsewhere.

Moree was one of the destinations of the famous 1965 Freedom Bus ride, an historic trip through northern NSW led by the late Charles Perkins to bring media attention to discrimination against Indigenous Australians.

From the late 1950s he regularly proposed legislation in Parliament to end racial discrimination, only to be defeated each time.

There is a theory among some academic groups that due to the discrimination and suppression by the Norwegian authorities the term Kven became derogatory in the late 19th century.

As in North America, the Chinese faced massive institutionalized discrimination, and Asian immigration was restricted by the White Australia Policy in the late 1880s.

In the late 1930s, Polish students were subject to discrimination by German teachers, many of whom had joined the NSDAP Nazi Party.

South Africa became independent after its racial discrimination that appeared throughout Africa in the late 1950s.

Later, although skin colour ceased to be an official discrimination, in practice the system changed little-although from the late 1960s onward blacks were admitted as ensigns ( alferes ), the lowest rank in the hierchy of commissioned officers.

Workers sued the union for race and sex discrimination numerous times in the late 1960s and early 1970s.

During his lifetime, he led a nationwide campaign in attempt to end caste discrimination in India during the late 19th and early 20th Centuries.

In the late 1960s, he became a Romani rights activist after reading reports about anti-Romani discrimination in Britain.