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posted by
martyb
on Tuesday February 28 2017, @10:23AM
from the results-are-not-as-foul-as-expected dept.
from the results-are-not-as-foul-as-expected dept.
According to the CBC [Canadian Broadcasting Corporation], researchers at Trent University sampled both the oven roasted chicken filets and the chicken strips that Subway uses on its sandwiches in Canada. After testing six small samples of the filets and three small samples of the strips, the researchers ran a DNA test.
The results showed that the filets contained just 53.6 percent chicken DNA. The strips were found to contain just 42.8 percent chicken DNA.
CBC reports that the rest of the DNA found in the chicken was soy — used either for either seasoning or filler.
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University Study Says Subway Chicken Strips Could Contain Less Than 50 Percent Chicken DNA
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(Score: 1, Interesting) by Anonymous Coward on Tuesday February 28 2017, @10:36AM (5 children)
What I want to know is how are such tests done and what are they actually measuring? Even 100% chicken meat isn't 100% chicken DNA by weight.
I have the impression that DNA tests are more useful for checking to see if there's too much rat or roach DNA in the samples...
BTW seems like those making kosher stuff might not cut corners as much: http://www.independent.co.uk/news/science/hot-dog-sausages-contain-human-dna-study-says-and-many-vegetarian-ones-contain-meat-a6710341.html [independent.co.uk]
(Score: 3, Funny) by c0lo on Tuesday February 28 2017, @11:40AM (1 child)
Those brits!
I wonder why do they make hot dogs with corners in the first place?
Is it perhaps to better fit the sausages in Cornish pasties?
https://www.youtube.com/watch?v=aoFiw2jMy-0 https://soylentnews.org/~MichaelDavidCrawford
(Score: 2) by MostCynical on Tuesday February 28 2017, @12:52PM
Turnip.
Not you, the filling in the corners. (Also potato, but that isn't as funny)
"I guess once you start doubting, there's no end to it." -Batou, Ghost in the Shell: Stand Alone Complex
(Score: 1, Informative) by Anonymous Coward on Tuesday February 28 2017, @11:49AM (1 child)
Molecular markers, probably through an (q)RT-PCR reaction. You can generate them to be specific for species. You test your material for the species it should be, then you get results that it is the species.... but also others. Then you go on with using markers for a variety of species and get results that match them or not.
This test is about 2-3 days work in a normal molecular genetics lab for one researcher.
(Score: 1, Informative) by Anonymous Coward on Wednesday March 01 2017, @11:00AM
Why is the above even modded informative? That's for testing for the existence of stuff, not the _proportion_ which is what this story is about.
https://en.wikipedia.org/wiki/Polymerase_chain_reaction [wikipedia.org]
Polymerase chain reaction (PCR) is a technique used in molecular biology to amplify a single copy or a few copies of a piece of DNA across several orders of magnitude, generating thousands to millions of copies of a particular DNA sequence.
e.g. it amplifies the tiny bit of DNA you have.
So that's useful for knowing if you have soybean or rat in something when you shouldn't. But how is that going to help with _accurately_ figuring out the proportion of soybean vs chicken by mass?
(Score: 1, Interesting) by Anonymous Coward on Tuesday February 28 2017, @06:01PM
I have known this for a long time, this is why I prefer to buy Kosher Products. You can say a lot about religion, but in this one instance they have a huge net positive on accountability. The kosher inspectors take their jobs... religiously.