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Polysulfide polymers are also prepared by the addition of polysulfanes to alkenes. An idealized equation is: 2 RCH=CH 2 + H 2 S n → (RCH 2 CH 2) 2 S n. In reality, homogeneous samples of H 2 S n are difficult to prepare. [2] Polysulfide polymers are insoluble in water, oils, and many other organic solvents.
Shower gel (also called body wash) is a specialized liquid product used for cleaning the body during showers. Not to be confused with liquid soaps, shower gels, in fact, do not contain saponified oil. Instead, it uses synthetic detergents derived from either petroleum or plant sources.
The body wash is very creamy and easily lathers up on my body. My skin felt clean and moisturized after use, plus the fantastic scent lingered as well. Definitely a plus that it uses natural ...
Exfoliation methods used in Canada, 2011. Shown: top right, a bath sponge made of plastic mesh; lower right, a brush with a pumice stone on one side and a natural bristle brush on the other side, for foot exfoliation; lower left, a mud mask package for facial exfoliation; top left, a jar of perfumed body scrub to be used while bathing.
In the human body, water constantly evaporates from the deeper layers of the skin through an effect known as transepidermal water loss.By regulating its water content, human skin naturally maintains a dry, easily shed surface as a barrier against pathogens, dirt, or damage, while protecting itself from drying out and becoming brittle and rigid.
Three categories of barrier creams are used: water repellent creams, water-soluble creams, and creams designed for special applications. [4] Moisturizing barrier cream acts as a lubricating film on the skin to prevent depletion of water (transepidermal water loss) in the skin's outermost layer, the stratum corneum. [5]
Kojic acid has been found to be an effective lightener in some studies and is also allowed to be used in cosmetics. [6] Side effects include redness and eczema. [6] Glutathione is the most common agent taken by mouth to whiten the skin. [10] It can be used as a cream. [10] It is an antioxidant normally made by the body. [10]
The human body produces perspiration (sweat) via two types of sweat gland: eccrine sweat glands which cover much of the skin and produce watery odourless sweat, and apocrine sweat glands in the armpits and groin, which produce a more oily "heavy" sweat containing a proportion of waste proteins, fatty acids and carbohydrates, that can be metabolized by bacteria to produce compounds that cause ...