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Electron paramagnetic resonance (EPR) or electron spin resonance (ESR) spectroscopy is a method for studying materials that have unpaired electrons.The basic concepts of EPR are analogous to those of nuclear magnetic resonance (NMR), but the spins excited are those of the electrons instead of the atomic nuclei.
Ethylene propylene rubber (EPR, sometimes called EPM referring to an ASTM standard) is a type of synthetic elastomer that is closely related to EPDM rubber. Since introduction in the 1960s, annual production has increased to 870,000 metric tons. [1] [2] The skeletal formula of ethylene propylene rubber.
In 2012–2013, the UNECE EPR Programme undertook a review of a non-UNECE country – Morocco. [7] The EPR of Morocco [8] was carried out in cooperation with UNECA to facilitate the transfer of the EPR methodology and know-how from UNECE to UNECA. [9] In 2017, the UNECE EPR Programme undertook a review of another non-UNECE country – Mongolia.
A magnetic field of 0.62 mT was used requiring a frequency of 17.4 MHz. The first microwave electron spin echoes were reported in the same year by Gordon and Bowers using 23 GHz excitation of dopants in silicon. [2] Much of the pioneering early pulsed EPR was conducted in the group of W. B. Mims at Bell Labs during the 1960s. In the first ...
Tires are an example of products subject to extended producer responsibility in many industrialized countries. Extended producer responsibility (EPR) is a strategy to add all of the estimated environmental costs associated with a product throughout the product life cycle to the market price of that product, contemporarily mainly applied in the field of waste management. [1]
Oil prices will fall to an average of $65 per barrel in 2025 amid an oversupply of crude and a backdrop of slowing demand as countries shift toward cleaner energies and forms of transportation ...
Refined used cooking oil is what is left after separation of solids and moisture from yellow grease. Refined used cooking oil is the base for producing biodiesel and renewable diesel. [9] Refined used cooking oil then goes through either to transesterification to produce biodiesel or hydrodeoxygenation to produce renewable diesel.
MEG Energy - Borderline large cap oil sands producer with 5 billion barrels (790,000,000 m 3) 6 billion barrels (950,000,000 m 3) of 2P reserves in Christina Lake and Surmont (the 2 projects are 50 km apart). Tourmaline Oil - Primarily a natural gas company with operations in Northern BC and central Alberta. In the first half of 2012 88% of ...