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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.
BJ Services Company was a leading worldwide provider of pressure pumping and oilfield services for the petroleum industry.Pressure pumping services consist of cementing and stimulation services used in the completion of new oil and natural gas wells and in remedial work on existing wells, both onshore and offshore.
Drum pump, barrel pump, and transfer pump refer to pumps that are used to empty barrels, tanks, IBCs and drums. [1] Many liquids used on manufacturing and processing plants are delivered in 100 or 200 litre barrels and are too heavy to tip to empty the liquids inside. Drum pumps range from simple siphon based devices to sophisticated highly ...
EPR Properties Prices $275 Million of 5.250% Senior Notes Due 2023 KANSAS CITY, Mo.--(BUSINESS WIRE)-- EPR Properties (NYS: EPR) (the "Company") announced today that it has priced an underwritten ...
Mbod – thousand barrels of oil per day; Mboe – thousand barrels of oil equivalent; Mboed – thousand barrels of oil equivalent per day; MBP – mixed-bed polisher; Mbpd – thousand barrels of oil per day; MBR – minimum bend radius; MBRO – multi-bore restriction orifices; MBT – methylene blue test; MBWH – multi-bowl wellhead
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 ...