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Substances with a pH level of below 7 are said to be acidic and substances above the pH level of 7 are alkaline. An example of a substance with the pH of about 3 is orange juice.
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scaffolding protein
fatty acids and glycerol
These substances are called antiperspirants or deodorants; they contain compounds of aluminium and zirconium. See also the link below.
2. carbon, glucose, oxygen, enzymes
Through a process known as Sublimation
it evaporates
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At the bottom of the rib-cage along the midline of the body, you will feel the ribs from the right and left sides of the body come together at a triangular corner. Just below this sits the cartilaginous Xiphoid Process.
Acids always have a pH below 7.0.
There are too many radioactive substances to list here. For more information, please the the Related Link below.
Any substance that is has a low pH value(specially 1-6, any value under 7) would help promote demineralization of the teeth. Substances such as lemon juice, white vinegar and carbonated drinks are highly acidic, having pH value's of 3 or below, meaning that these types of substances will promote the process of deminerlization becasue acidic substances break down tooth enamel, making the teeth weaker and more prone to demineralization.
all acidic substances with a PH below 7< turn the Universal indicator red due to their acidity.
liver
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It's called Cryogenics This refers to study of substances below 123K (−150 °C, −238 °F)