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5 lis 2019 · Answer: Petroleum jelly is made by the waxy petroleum material that formed on oil rigs and distilling it. The lighter and thinner oil-based products make up petroleum jelly, also known as white petrolatum or simply as petrolatum. Robert Chesebrough is the chemist who devised and patented this process (U.S. Patent 127,568) in 1872.
Petroleum jelly, petrolatum, white petrolatum, soft paraffin, or multi-hydrocarbon, CAS number 8009-03-8, is a semi-solid mixture of hydrocarbons (with carbon numbers mainly higher than 25), [1] originally promoted as a topical ointment for its healing properties. [2]
This lab is super easy. All you have to do is have students smear a thin layer of petroleum jelly across the center of a glass microscope slide with a clean cotton swab. If you want your students to have quantitative data at the end of the experiment, gridded slides are ideal (See image).
In this classroom experiment, you will use graph paper and petroleum jelly to "catch" particulate air pollutants for classroom observation. Each student group will be responsible for creating 3 Sample cards and placing them at various locations.
Petroleum Jelly. In subject area: Medicine and Dentistry. It is a compound consisting of an organic matrix, made of wax, petrolatum, oil and lubrication solvents, with fillers that consist of calcite, barite, kaolinite, fluorite, illite, potato starch. From: Reference Module in Earth Systems and Environmental Sciences, 2018.
petroleum jelly, translucent, yellowish to amber or white, unctuous substance having almost no odour or taste, derived from petroleum and used principally in medicine and pharmacy as a protective dressing and as a substitute for fats in ointments and cosmetics.
METHOD: Step one. Using the marker and tape, label the two clear plastic containers. Label one “inside air” and the other “outside air.”. Step two: Wearing rubber gloves, spread a layer of petroleum jelly on the bottom of each of the containers. Try to make an even layer.
