Notesale: Turn your study into money

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Plant Oils
In a process called photosynthesis, plants use the suns energy to produce
glucose, a type of sugar, from carbon dioxide and water
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𝑐𝑎𝑟𝑏𝑜𝑛 𝑑𝑖𝑜𝑥𝑖𝑑𝑒 (6𝐶𝑂2 ) + 𝑤𝑎𝑡𝑒𝑟 (6𝐻2 𝑂)
→ 𝑔𝑙𝑢𝑐𝑜𝑠𝑒 ( 𝐶6 𝐻12 𝑂6 ) + 𝑜𝑥𝑦𝑔𝑒𝑛 (6𝑂2 )
Other chemicals can be made from the glucose, chemicals such as vegetable
oil
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Oils, such as those found in an oilseed rape plant, can be found in the seeds,
and using specific machinery can harvest those seeds
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Steam is another extracting method
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The oil and
water evaporate together before the water along with any other impurities,
are removed
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All vegetable oils have
molecules which contain chain of carbon and hydrogen atoms
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These make unsaturated oils, and with good
use of bromine water, can be detected
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Oils are great as a supplier of energy as well
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But despite this, only 20% of your diets
energy should come from fats including oil
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Therefore, we
use them in cooking
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Foods also absorb
some of the oil when cooking, making fried foods more energy rich than
boiled foods
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The
reaction replaces some or all the C=C (double carbon) bonds with C-C (single
carbon) bonds
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Oils subject to this process are often called hydrogenated oils, such as
margarine
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The droplets will then spread out throughout
the water to create a mixture called an emulsion
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To stop oil and water spreading out into layers, we use what’s called an
emulsifier
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Yolks come to effect in
the production of mayonnaise
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However, the
mayonnaise is not so because of the egg yolk
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The
hydrophobic part is a tail like hydrocarbon chain, meanwhile the ‘head’
carries a charge which makes it hydrophilic
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According to scientists, vegetable oils are better for you than animal fats
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However, unsaturated fats, like those in olive oil, are very
good for you
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This is why chips and other fast foods aren’t good for us,
because they are cooked in certain fats not good for us
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