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12) often form as inclusions in the material. [13] Grain boundaries in extruded plate 6061 aluminium alloy. Grain sizes in aluminium alloys are heavily dependent upon the processing techniques and heat treatment. Different cross-sections of material which has been stressed can cause order of magnitude differences in grain size. [14]
Sexagesimal, also known as base 60, [1] is a numeral system with sixty as its base.It originated with the ancient Sumerians in the 3rd millennium BC, was passed down to the ancient Babylonians, and is still used—in a modified form—for measuring time, angles, and geographic coordinates.
PCBM ([6,6]-phenyl-C 61-butyric acid methyl ester) is a fullerene derivative being investigated for its potential use in organic solar cells. [ 3 ] PCBM is a fullerene derivative of the C 60 buckyball that was first synthesized in the 1990s. [ 4 ]
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Commission Directive 2008-61-EC of 17 June 2008 establishing the conditions under which certain harmful organisms, plants, plant products and other objects listed in Annexes I to V to Council Directive 2000-29-EC may be introduced into or moved within the Community or certain protected zones thereof, for trial or scientific purposes and for work on varietal selections (Codified version)
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In 1874, the U.S. government created the United States Reports, and retroactively numbered older privately published case reports as part of the new series. As a result, cases appearing in volumes 1–90 of U.S. Reports have dual citation forms; one for the volume number of U.S. Reports, and one for the volume number of the reports named for the relevant reporter of decisions (these are called ...
61 is the fourth cuban prime of the form = where = +, [4] and the fourth Pillai prime since ! + is divisible by 61, but 61 is not one more than a multiple of 8. [5] It is also a Keith number , as it recurs in a Fibonacci-like sequence started from its base 10 digits: 6, 1, 7, 8, 15, 23, 38, 61, ...