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Petrochemical. Petrochemicals (sometimes abbreviated as petchems [1]) are the chemical products obtained from petroleum by refining. Some chemical compounds made from petroleum are also obtained from other fossil fuels, such as coal or natural gas, or renewable sources such as maize, palm fruit or sugar cane .
Eyelash perm. Eyelashes before (left) and after (right) a perm. Eyelash permanent wave, or more commonly called an eyelash perm, and may also refer to permanent relaxer that straightens the hair is a cosmetics procedure performed only by licensed cosmetologists to flip up eyelashes using hair perming technology.
Phenylmercuric acetate has been used as a preservative in eyedrops and paint, disinfectant, former fungicide in agriculture, and a potential fungicide in leather processing. [1] [2] [3] It kills crabgrass, the seedlings of which are especially vulnerable, but leaves most lawn grasses intact. [4]
113, 6734. Anatomical terminology. [ edit on Wikidata] An eye is a sensory organ that allows an organism to perceive visual information. It detects light and converts it into electro-chemical impulses in neurons (neurones). It is part of an organism's visual system . In higher organisms, the eye is a complex optical system that collects light ...
Although this is a major limitation, the synthetic utility of this process remains significant, due to the frequent appearance of methyl-substituted alkenes in natural products. Zr-walk [ edit ] Zirconocene dichloride together with a reducing reagent can form the zirconocene hydride catalyst in situ, which allows a positional isomerization (so ...
A safety shower is a unit designed to wash an individual's head and body which has come into contact with hazardous chemicals. Large volumes of water are used and a user may need to take off any clothing that has been contaminated with hazardous chemicals. Safety showers cannot be used for flushing an individual's eyes, due to the high pressure ...
Chemical & Engineering News publishes an annual list of the world's largest chemical producers by sales, excluding formulated products such as pharmaceutical drugs and coatings. In 2018, sales of the top fifty companies amounted to US$ 951,000,000,000, an increase of 11.8% compared to the top fifty producers of 2017. [2]
Ivermectin is an antiparasitic drug. After its discovery in 1975, its first uses were in veterinary medicine to prevent and treat heartworm and acariasis. Approved for human use in 1987, it is used to treat infestations including head lice, scabies, river blindness (onchocerciasis), strongyloidiasis, trichuriasis, ascariasis and lymphatic filariasis.
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