Framed Prints
Framed Print of Johann Wolfgang Dobereiner, German Chemist
Johann Wolfgang Dobereiner, German Chemist Johann Wolfgang Dobereiner (December 13, 1780 - March 24, 1849) was a German chemist. He had little formal schooling, was apprenticed to an apothecary, but attended science lectures and read whatever he could get his hands on. He eventually became a professor at the University of Jena in 1810. In 1829 he discovered trends in certain properties of selected groups of elements. The average atomic mass of lithium and potassium was close to the atomic mass of sodium. A similar pattern was found with calcium, strontium, and barium, with sulfur, selenium, and tellurium, and also with chlorine, bromine, and iodine. The densities for some of these triads followed a similar pattern. These sets of elements became known as "Dobereiner's Triads", one of the forerunners of Mendeleev's periodic table. He is also remembered for his work on the use of platinum as a catalyst, and for a lighter, known as Dobereiner's lamp in which zinc metal reacted with sulfuric acid to produce hydrogen gas. When the valve was opened, a jet of hydrogen was released and bursts into flame. The ignition was catalyzed by platinum metal. He died in 1849 at the age of 68. © Researchers, Science History Images
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Media ID 49222652
Chemist Chemistry Enhance Enhancement Important Inventor Notable Personalities Personality Well Known
Modern Frame 14"x12" (36x31cm)
Ready to Hang Contemporary Framed Prints adds style, protection, and a polished touch to your space - effortlessly.
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Wood effect frame, card mounted, 10x8 fade resistant photo print. Overall outside dimensions 14x12 inches (36x31cm). Environmentally and ozone friendly, 40mm wide x 15mm Polycore® moulding has the look of real wood, is durable and light and easy to hang. Biodegradable and made with non-chlorinated gases (no toxic fumes) it is efficient; producing 100 tons of polystyrene can save 300 tons of trees! Prints are glazed with lightweight, shatterproof, optical clarity acrylic (providing the same general protection from the environment as glass). The back is stapled hardboard with a sawtooth hanger attached. Note: measurements provided are estimated outer dimensions, which include both the image and the frame. While we aim to keep sizing consistent, exact dimensions may vary slightly due to differences in print size or production requirements, which may result in a variation in the overall size (up to approximately 2.5cm (1"))
These are individually made so all sizes are approximate
Estimated Image Size (if not cropped) is 17.8cm x 24.4cm (7" x 9.6")
Estimated Product Size is 31cm x 36cm (12.2" x 14.2")
