The tactic worked, but margarine producers found a way around this obstacle, Dr Petrick recalls.
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In fact, the reduced-trans-fat cake actually edged out the margarine cake as the winner.
The margarine, being a light oil, works as a solvent on a heavier oil.
BBC: Birds to be released in Dorset four weeks after oil rescue
Once policy makers realized how absurd this was, the ban on yellow margarine was repealed in 1950.
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They're easy to fix with just a bit of olive oil, margarine or butter, salt and pepper.
Mrs Dalton's family started the week stacking up their six pint plastic milk bottles and tubs of margarine.
The other comes from western Canada, home to the farmers who grow the oilseeds that go into margarine.
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He ventured far beyond mainstays, selling talcum powder in India, margarine in South Korea and fashion eyewear in Italy.
"I don't think a margarine should be considered a health food, " he says.
The RSPCA said washing up liquid was initially used to clean the birds, but margarine proved to be far more effective.
Last summer, a trade tribunal backed a complaint by Alberta's government that the margarine law amounted to an unfair restraint of trade.
ECONOMIST: The battle to kill off an antiquated protectionist law
In one study, researchers made three types of cakes: margarine only, extra-virgin olive oil only, and a combination of olive oil and margarine.
This is thought to explain a rise in butter sales in recent years over those of margarine, seen by many as a "chemical" product.
At present the tops, however, and the brittle plastic that makes up things like margarine tubs, have so little that they're not worth recycling.
It has come up with a "ladies' loaf" made from soy flour instead of wheat and linseed oil (another phyto-estrogen-rich product) instead of margarine.
Staff used washing up liquid and margarine to clean the animals.
Sometimes that was just a piece of bread with margarine, a small portion that caused the starving prisoners to attack each other for extra shares, Avital said.
As the system gathered momentum, the ordinary ration came to encompass meat, cheese, butter, margarine, bacon and ham, tea, preserves, sugar and cooking fats such as lard.
Until Wednesday they were mainly being cared for at the RSPCA's West Hatch wildlife centre in Taunton, Somerset, where they were cleaned with washing up liquid and margarine.
Her aunt would tell her about how she kneaded yellow dye that was sold in small capsules alongside packs of opaque, colorless margarine into the spread before serving it.
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Remember when butter was evil and margarine was king?
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Staff used washing-up liquid and margarine to clean them.
BBC: Birds to be released in Dorset four weeks after oil rescue
But this research linked other oils -- like those found in margarine, fried and baked goods and salty snacks that contain so-called trans-fatty acids -- to a higher incidence of breast cancer.
Ok, so RFID tags - tiny, cheap computer chips - will change the world when they are attached to everything from a tub or margarine to a packet of fags (if, you can still buy those in 10 years' time).
It was always the same: a great wedge of papaya with limes, a crisp thin omelette with green chilis mixed in, two slices of inch-thick white-bread toast, a dollop of red jelly and of margarine, and a pot of coffee with milk.
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