After tests in two different detectors, it was confirmed that the particle possessed those properties.
The firm stopped production after tests found 75% horse DNA in an ingredient imported from Poland.
MacLeod was banned after tests revealed high levels of testosterone, which was later attributed to alcohol intake.
Labelled as Tesco Simply Roast Meatloaf, the product was withdrawn after tests revealed it contained between 2% and 5% horsemeat.
Redux, its appetite-suppressant, was pulled from the pharmacy shelves last year after tests suggested that it might cause fatal heart defects.
The Orlando Pirates' midfielder was sent to the United States to see experts after tests discovered he has a heart condition.
The Burger Manufacturing Company based near Builth Wells withdrew its products in February after tests suggested they contained more than 1% horsemeat.
The beef has been withdrawn from menus after tests showed the beef contained less than 1% of horse DNA, the authority said.
It was found after tests in the Republic by food safety officials.
Last year, the FDA slapped a countrywide alert on all Chinese eel after tests showed residues of an antimicrobial agent, she said.
After tests, Switzerland-based Novartis dropped the idea of using the medicine for transplant patients because it was no more effective than existing agents.
Burgers have been put back on menus at Sheffield schools after tests showed they were clear of horse DNA, the city council said.
In 2004, three Senate office buildings were shut after tests found ricin in letters that had been sent to the Senate majority leader's office.
Cumbria Wildlife Trust and a group of volunteers restored a hay meadow at Row Foot, Ravenstonedale, after tests showed the soil had low fertility.
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He was released the following day after tests revealed nothing serious.
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No horsemeat or pig DNA has been found in food samples taken from schools and care homes in Cardiff after tests were ordered by the council.
BBC: Horsemeat scandal: Cardiff schools and care homes clear
They said he had been transferred to a different hospital after tests suggested he had reacted poorly to medication prescribed as part of his mental health treatment.
The re-use of animals will be allowed after tests involving "moderate" pain - though the Commission had proposed re-use only after tests classed as "up to mild" pain.
His remarks comes as it emerged Tesco had withdrawn a line of frozen meatloaf made in Northern Ireland after tests revealed it contained between 2% and 5% horsemeat.
Doctors initially feared the illness, which caused severe inflammation of vital organs, was anthrax but ruled that possibility out after tests at the government's chemical weapons research centre.
Burgers on sale at several supermarkets were taken off the shelves after tests in Ireland found horsemeat accounted for nearly 30% of the meat content in one sample.
After tests, doctors decided to scan his brain and discovered he had a large tumour in the middle of his brain, he was then referred to the Children's Hospital.
BBC: Sheffield & South Yorkshire - Children's hospital: Your stories
On Monday, Swedish company Ikea withdrew meatballs from sale in 14 European countries after tests in the Czech Republic found traces of horsemeat in a batch made in Sweden.
And last week the British unit of frozen foods giant Findus started to recall its beef lasagne on advice from its French supplier, Comigel, after tests showed concentrations of horsemeat.
The Burger Manufacturing Company, based in Powys, withdrew its products in February after tests suggested they contained more than 1% horsemeat, but further tests showed that the level was below 1%.
That trip usually takes about two days, but after tests with three previous cargo vessels, the trip was made for the first time with a manned flight and set a new record.
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Shark floor-cleaning devices, owned by Euro-Pro Operating LLC, overhauled the design of its electronic Sonic Duo floor cleaner, set to launch in April, after tests revealed how strenuously some people used it.
WSJ: Cleaning Products Get Stronger Even Though Scrubbers Insist On Using Elbow Grease
Members of Stevens' family have been taken off antibiotics after tests showed no trace of anthrax in the family's home, said Dr. Jean Malecki, director of the Palm Beach County Health Department.
Ikea has withdrawn a batch of frozen meatballs from sale in the food section of stores in the UK, and other European countries, after tests in the Czech Republic found traces of horsemeat.
Last week Ikea withdrew a batch of frozen meatballs from sale in the food section of stores in the UK, and other European countries, after tests in the Czech Republic found traces of horsemeat in those products.
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