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    Acetic Acid

    March 8, 2018, Categories  Chemistry/Nanotechnology

    ACETIC ACID

    Ball and stick model of acetic acid
     

    ~ also known as Ethanoic acid; 64-19-7; Ethylic acid; Acetic acid, glacial; Methanecarboxylic acid etc. is the second simplest carboxylic acid (after methanoic acid) and is a weak monoprotic acid. Global demand for acetic acid is about 6.5 million metric tons per year (Mt/a), of which ~1.5 Mt/a is met by recycling; the rest made from methanol.

    Chemical structure:  CH3COOH (CH3CO2H, C2H4O2). It has a methyl group attached to a carboxyl group.

    Properties: hygroscopic, corrosive liquid with a vinegar-like odor. At physiological pHs, acetic acid is usually fully ionised to acetate.

    Production: 

    Acetic acid is produced industrially both synthetically and by bacterial fermentation

    a) Methanol carbonylation (approximately 75% of acetic acid in the chemical industry): Metha...

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    New Insights could pave the way for Self-Powered Low Energy devices

    March 8, 2018, Categories  Physics, Technology/Electronics

    Georgia Tech professor Zhong Lin Wang poses with an array of 1,000 LED lights that can be illuminated by power produced by the force of a shoe striking a triboelectric generator placed on the floor. Credit: Rob Felt

    Georgia Tech professor Zhong Lin Wang poses with an array of 1,000 LED lights that can be illuminated by power produced by the force of a shoe striking a triboelectric generator placed on the floor. Credit: Rob Felt

    Researchers have discovered more details about the way certain materials hold a static charge even after two surfaces separate, information that could help improve devices that leverage such energy as a power source. While the effects of static electricity have been fascinating casual observers and scientists for millennia, certain aspects of how the electricity is generated and stored on surfaces have remained a mystery.

    Now, researchers have discovered more details about the way certain materials hold a charge even after two surfaces separate, information that could help impr...

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    NASA Juno finds Jupiter’s Jet-streams are unearthly

    March 8, 2018, Categories  Astronomy/Space

    Composite image, derived from data collected by the Jovian Infrared Auroral Mapper (JIRAM) instrument

    This composite image, derived from data collected by the Jovian Infrared Auroral Mapper (JIRAM) instrument aboard NASA’s Juno mission to Jupiter, shows the central cyclone at the planet’s north pole and the eight cyclones that encircle it. Image credit: NASA/JPL-Caltech/SwRI/ASI/INAF/JIRAM

    Data collected by NASA’s Juno mission to Jupiter indicate that the atmospheric winds of the gas-giant planet run deep into its atmosphere and last longer than similar atmospheric processes found here on Earth. The findings will improve understanding of Jupiter’s interior structure, core mass and, eventually, its origin...

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    ALMA reveals Inner Web of Stellar Nursery

    March 8, 2018, Categories  Astronomy/Space

    This spectacular and unusual image shows part of the famous Orion Nebula, a star formation region lying about 1350 light-years from Earth. It combines a mosaic of millimetre wavelength images from the Atacama Large Millimeter/submillimeter Array (ALMA) and the IRAM 30-metre telescope, shown in red, with a more familiar infrared view from the HAWK-I instrument on ESO's Very Large Telescope, shown in blue. The group of bright blue-white stars at the left is the Trapezium Cluster -- made up of hot young stars that are only a few million years old. Credit: ESO/H. Drass/ALMA (ESO/NAOJ/NRAO)/A. Hacar

    This spectacular and unusual image shows part of the famous Orion Nebula, a star formation region lying about 1350 light-years from Earth. It combines a mosaic of millimetre wavelength images from the Atacama Large Millimeter/submillimeter Array (ALMA) and the IRAM 30-metre telescope, shown in red, with a more familiar infrared view from the HAWK-I instrument on ESO’s Very Large Telescope, shown in blue. The group of bright blue-white stars at the left is the Trapezium Cluster — made up of hot young stars that are only a few million years old. Credit: ESO/H. Drass/ALMA (ESO/NAOJ/NRAO)/A. Hacar

    New data from the ALMA and other telescopes have been used to create this stunning image showing a web of filaments in the Orion Nebula...

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