Test # 12
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1500 questions in 150 tests. Each test contains 10 questions.
Idiom of the Day
chalk (something) up to (something)
to recognize something as the cause of something else
We were able to chalk our success up to our new boat.
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Precautions while using Shampoo
In addition to cleansing surfactants, other types of surfactants are added to shampoos to improve the foaming characteristics of the formulation. These materials, called alkanolamides, help increase the amount of foam and the size of the bubbles. Like primary detergents, they are also derived from fatty acids and have both water soluble and oil soluble characteristics. Typical materials include lauramide DEA or cocamide DEA.