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Spectra registered 90 days after irradiation show a hyperfine structure.
The EPR spectrum of the hyperfine structure in the examined GUR1020 and GUR1050 polyethylenes consists of seven characteristic lines.
EPR tests after 255 and 372 days show a changing nature of the UHMWPE spectrum, characterised by the decay of the hyperfine structure (Fig. 4).
Parr, A study of long-lived free radicals in gamma-irradiates medical grade polyethylene, Radiation Physics and Chemistry 62 (2001) 141-144
Czaja, Changes in UHMWPE morphology and structure after with an electron beam and thermal treatment, Solid State Phenomena 2012 (in print).

Structure formation and properties of chromium-vanadium cast irons are described in [4–9].
Element content of the sediment and its phase composition were determined by standard methods of analytical chemistry and X-ray structural analysis.
Structure and Wear Resistance of Tools, MGTU Publ., Magnitogorsk, 2002
Molochkov, Structure and wear resistance of chromium-vanadium cast irons, Izvestiya VUZ.
Yakovleva, Structure of Heat Treated Steel, Metallurgiya Publ., Moscow, 1994

As shown in Fig. 4(c), the ZnO nanoparticle is about 8 nm and the crystal structure can be observed clearly.
Directly assembling ligand-free ZnO nanocrystals into three-dimensional mesoporous structures by oriented attachment.
Inorganic Chemistry, 50 (2011) 5841-5847
Analytical Chemistry, 51 (1979) 466-482
ZnO nanoflowers with single crystal structure towards enhanced gas sensing and photocatalysis.

The crystal structure of the alloys was identified by X-ray diffraction equipment (XRD, Brookhaven, USA).
All alloys showed almost the same diffraction peaks, which indicated these alloys had the same structure.
As can in Fig.1(a), all alloys had the hexagonal CaCu5 type structure as the main crystal structure.
Generally, there is a single CaCu5 type structure in AB5 alloy, since Mg cannot be completely solid-soluted in CaCu5 type structure, part of Mg as a metastable form existed in CaCu5 type structure, and part of Mg combining with other elements (mainly Al, Mn) separated out.
Materials Chemistry and Physics, 2013,138:803 [4] Shuqin YANG, Shumin HAN, Jianzheng SONG, Yuan LI.

X-ray diffraction measurements confirmed that all nickel-iron alloy films formed have face-centered cubic structure.
Thin film nanocrystalline structures offer a new opportunity to improve current magnetic materials.
All the reflection patterns for these samples indicate that the films are having face-centered cubic (FCC) structure.
The crystal structures of the prepared Ni-Fe thin films were FCC.
Chemistry and Phys Vol. 107 (2008), p. 289 [9] S.

At the beginning of 2 minutes friction course, wear rate decrease soon that is related to ceramic coating structure.
After 2 minutes, friction object is compact layer which has a compact structure with hardness about 1500 HV.
Ceramic coatings treated by different kind of process have different roughness and island structure of deposit.
Compact layer contains amount of α-Al2O3 superhard phase so that compact structure can prevent the breaking off of ceramic micro particle.
Zhao, et al: Materials Chemistry and Physics, Vol. 97 (2006), p. 132

Research on the Long-Lasting and Remelting Properties of Nd Modification Effect on Cast Al-Mg2Si Metal Matrix Composite Yi Si1,a and Kevluzov D.S.2 1Department of Applied Chemistry, Liaoning Petrochemical Vocational and Technology College, Jinzhou, China 2Department of Materials Science, Urgench State University, Urgench City, Uzbekistan ayisi67218917@126.com Keywords: Nd modification, Al-Mg2Si, long-lasting and remelting properties.
After the composite is modified for 300 min and remelted by 6 times, its primary and eutectic Mg2Si structures are still in modification state of small block and slices, and the tensile properties of the composite are not significantly affected.
The effect of rare earth Nd on the structure and properties of the composite at different time of modification and different times of remelting was studied, and the long-term and remelting properties of Nd modification were explored.
After prolonging the modification time to 60min, the primary Mg2Si structure were unchanged, and was still in a small massive modification state; however, compared with the structure of holding for 10min, the eutectic Mg2Si grain became smaller, and the morphology mostly changed from flake to short fiber or particle, as shown in Figure1(c).
When the modification time was extended to 300min, some of the primary Mg2Si grow up slightly, but it was still distributed on the eutectic structure matrix evenly, and it was the refined state after modification, while most of the eutectic Mg2Si grains still kept fine fibrous and granular, as shown in Fig.1(d).

The body-centered cubic structure of silver orthophosphate with 1-10 μm in diameter was successfully synthesized.
However, the doping technique resulted in the defects in structure which suppresses the photocatalytic activities due to increase in the recombination rate of photo-induced electron-hole pair formation [5].
The crystal structure of Ag3PO4 was characterized using XRD (x-ray diffractometer).
The body-centered cubic structure of Ag3PO4 (JCPDS no. 06-0505) was successfully synthesized [6,7].
Summary The body-centered cubic structure of Ag3PO4 with 1-10 μm in diameter could be successfully synthesized.

Thick Film Processing Challenges in the Realisation of a Co-Fired Solid Oxide Fuel Cell Roll Mark Cassidy1, a *, Paul Connor 1, Marielle Etches1, Yann Kalecheff1, Marina MacHado1, Julie Nairn1 and John Irvine1 1University of St Andrews, School of Chemistry, St Andrews, UK amc91@st-andrews.ac.uk *corresponding author Keywords: Solid Oxide Fuel Cell, SOFC, SOFCRoll, Thick Film, Tape Casting, Screen Printing, Cofiring, Portable Power, CHP, Processing Abstract The Solid Oxide Fuel Cell Roll (SOFCRoll) is a novel design based on a double spiral.
To optimise layer thickness to function, thinner screen printed layers were combined into the tape cast structure in 2nd generation cells.
a b Figure 6; 2nd generation cross sections showing (a) a montage image of the overall SOFCRoll structure and (b) a close up of the active cell region with the electrolyte in the centre and the cathode layers to the top.
This burnt out to leave the channel structure shown in Figure 7b.
a b Figure 9 (a); Separation at zirconia electrolyte lamination interface (b) triple cast zirconia multi-layered structure.

A direct correlation between PRE and megasonic induced damage of device structures demonstrates that a considerable amount of damage is already formed at less efficiently cleaned areas of the wafer.
Xu, "Nano-sized particles: quantification and removal by brush scrubber cleaning", PhD thesis in Chemistry at KULeuven (2004)