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ลำดับตอนที่ #109 : Is-it-safe-to-reheat-takeaways
Reheating
a takeaway (or if you’re American, take-out) may seem like a good idea at the
end of a hard day – but many of us have learnt that there can be a heavy price
to pay. Around one million people in the UK suffer food poisoning each year,
and it’s often because we have failed to take a few simple steps.
In
the video below, Michael Mosley of the TV programme Trust Me I’m a Doctor uses
a thermal camera to
analyse whether reheated takeaway food is safe or not:
As
Mosley explains, the trick is to heat the food until it is 82C (176F)
throughout to be sure that you can kill any harmful bacteria.
That’s
easier said than done: while the outside may seem to be steaming, the inside
could have remained cooler – hosting a pocket of living bacteria. It’s for this
reason that it’s important to stir the dish so that all the food is heated
evenly.
Even
after having followed these steps, you shouldn’t reheat a meal more than once.
Each time it cools down, you offer more opportunities for the harmful
bacteria to multiply, making it harder to kill them all off
the next time you stick them in the oven or microwave.
This
is particularly true for one particular takeaway favourite – rice – which can
host spores of a nasty bug called Bacillus cereus. When left in food, the bacteria
produces toxins that trigger
diarrhea and vomiting. Unfortunately, these toxins are “heat stable” meaning
that even if you heat the rice to the point of killing all the bacteria, the
toxins will survive – and you’ll soon notice the effects of ingesting those poisons.
If
you do want to save your leftovers, you should cool the rice quickly – before
the bacteria can start churning
out those toxins – and refrigerate within an hour of
cooking. Otherwise you really are “playing Russian roulette with
your guts
thermal (adj,)
multiply
(v.) to increase very much in number, or (in mathematics) to add a number to itself a particular number of times:
trigger (v.) to cause something bad to start:
ingest (v.)
churning (n.)
the
illegal practice bystockbrokers of buying and selling a client's investments more often than necessary, in
order to make more money in commissions:
guts (n.)
bravery and determination:
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