Mariusz Kujawski
Encyclopedia
Mariusz Kujawski is a Polish
Poland
Poland , officially the Republic of Poland , is a country in Central Europe bordered by Germany to the west; the Czech Republic and Slovakia to the south; Ukraine, Belarus and Lithuania to the east; and the Baltic Sea and Kaliningrad Oblast, a Russian exclave, to the north...

 sprint canoer
Canoe racing
This article discusses canoe sprint and canoe marathon, competitive forms of canoeing and kayaking on more or less flat water. Both sports are governed by the International Canoe Federation ....

 who has competed since the late 2000s. He won a silver medal in the K-2 1000 m event at the 2007 ICF Canoe Sprint World Championships in Duisburg
Duisburg
- History :A legend recorded by Johannes Aventinus holds that Duisburg, was built by the eponymous Tuisto, mythical progenitor of Germans, ca. 2395 BC...

.

Kujawski finished fourth in the K-2 1000 m event at the 2008 Summer Olympics
2008 Summer Olympics
The 2008 Summer Olympics, officially known as the Games of the XXIX Olympiad, was a major international multi-sport event that took place in Beijing, China, from August 8 to August 24, 2008. A total of 11,028 athletes from 204 National Olympic Committees competed in 28 sports and 302 events...

 in Beijing
Beijing
Beijing , also known as Peking , is the capital of the People's Republic of China and one of the most populous cities in the world, with a population of 19,612,368 as of 2010. The city is the country's political, cultural, and educational center, and home to the headquarters for most of China's...

, but was changed to disqualified upon Adam Seroczyński
Adam Seroczynski
Adam Dariusz Seroczyński is a Polish sprint canoer who competed from 1997 to 2008. Competing in three Summer Olympics, he won a bronze medal in the K-4 1000 m event at Sydney in 2000....

's testing for positive for clenbuterol
Clenbuterol
Clenbuterol is a sympathomimetic amine used by sufferers of breathing disorders as a decongestant and bronchodilator. People with chronic breathing disorders such as asthma use this as a bronchodilator to make breathing easier...

 in a doping
Doping (sport)
The use of performance-enhancing drugs in sport is commonly referred to by the term "doping", particularly by those organizations that regulate competitions. The use of performance enhancing drugs is mostly done to improve athletic performance. This is why many sports ban the use of performance...

test.
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