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Okamoto, IEEE Journal of Photovoltaics 4 (2014) p. 1433-1435
Stegemann, Applied Surface Science 301 (2014) p. 56-62
Angermann, Applied Surface Science 312 (2014) p. 3-16
Bessais, Applied Surface Science 258 (2012) p. 8889-8894
Albella, Solar Energy Materials & Solar Cells 87 (2005) p. 583-593

Materials and methods Sludge.
Liu, Factors of effecting hydrogen production from anaerobic fermentation of excess sewage sludge, Environmental Science, 26 (2005)98-101.
Liu, Effects of pH on biohydrogen production from sewage sludge with alkaline pretreatment, Chinese Science Bulletine, 50(2005) 2734-2738.
Liu, Influential factors of fermentative hydrogen production from thermally treated sewage sludge, The Chinese Journal of Process Engineering, 9(2009) 47-52.
Zhao, Effects of initial pH on hydrogen production from acid pretreated municipal sludge, Environmental Science, 29(2008) 2628-2632.

Martensitic steels are candidate materials for high pressure applications although their H.E. sensibility has been evidenced for many years and shown strongly dependence on the microstructure.
Material.
A fully martensitic structure is obtained in all treatments; iron carbides (Fe3C) enriched with chromium, molybdenum and manganese are found in the materials tempered at 540ºC and 680ºC.
Chan, Journal-chinese institute of engineers, vol. 22 (1999) p. 43-57
Pyun and R.A Oriani, Corrosion Science, vol. 29, No. 5, (1989), p. 485-496

On of the most widely used electrode materials in electrocoagulation process is iron .When iron is used as anodes, upon oxidation in an electrolytic system, it produces iron hydroxide, Fe(OH)n where n = 2 or 3.
Therefore the appropriate selection of its materials is very important.
The most common electrode materials for electrocoagulation are iron and aluminum.
Mitchell, Mathematical analysis of a batch electrcoagulation reactor, Water Science and Technology: Water Supply Vol 2 No.5-6 pp65-71, (2002). 9.
Kobya, Elif Senturk , Treatment of poultry slaughterhouse wastewaters by electrocoagulation,Journal of Hazardous Materials (2005). 12.

Considering the requirements of the economical use of materials, simple manufacture and installation, and easy transportation, the shaft section length is taken as L = 7.5 m.
It can be found that the proposal 1 using steel pipe material is more economical after a comparative analysis.
Besides, the materials used for the foundation are less as the main structure is lighter in proposal 1.
[2] Donatas Jatulis, Zenonas Kamaitis, Algirdas Juozapaitis: Journal of Civil Engineering and Management ,Vol.
Science Press, 2001 (In Chinese)

Introduction Most raw materials, mineral fuels, and fossil fuels are limited and become scarce.
Materials that cannot be integrated must be completely recycled in the production processes.
Process industries are one of the largest producers of waste materials which are mostly released into the environment after partial treatment where toxic materials are usually transferred in a less harmful form.
Eliminate waste materials at their source wherever possible. 2.
Journal of Pharmaceutical Innovation,23-35

The materials of the up and down inclined blades in the five-segment arch system were relatively small and also different in length.
The materials used in the plain wood of tri-segment arch and five-segment arch were great, and also the head and tail of wood materials were overlapped.
Sichuan Building Science, 2011, 37 (4): 104~107
Journal of Fuzhou University (Natural Science Edition), 2011. 39 (6): 917~921
Building Science, 2012. 28 (1): 108~110

Age-hardening of rheo-high pressure die cast Al-alloy 6066 TAUTE Carlien1,a *, MÖLLER Heinrich2, b 1Department of Materials Science and Metallurgical Engineering, University of Pretoria, Pretoria, 0001, South Africa 2Council for Scientific and Industrial Research (CSIR), Pretoria, 0001, South Africa aaurora247@hotmail.com, bhmoller@csir.co.za Keywords: rheo-high pressure die casting (R-HPDC), alloy 6066, age-hardening, solution heat treatment, Vickers Hardness.
Acknowledgements The Department of Science and Technology (DST) in South Africa is acknowledged for funding under the Advanced Metals Initiative Program.
Turkish Journal of Engineering and Environmental Sciences 31 (2006) 53-60
Materials Science Forum 794-796 (2014) 137-142
Materials and Manufacturing-Casting.

Experimental Program and Methods Material: The material selected for this investigation is an aluminium alloy AA7075-T7351 plate of 6.35 mm (0.25 inch) thickness, used extensively in the manufacture of typical airframe structures.
Grandt, Jr., Fracture mechanics consideration of residual stresses introduced by cold working fastener holes, Journal of Engineering Materials and Technology, 102 (1980) pp. 85-91
Reid, Aging aircraft repair strategies utilizing cold expansion technologies – Part 1, The science of cold expansion, PowerPoint presentation, Ageing Aircraft User’s Forum, 23-25 May, 2007, Brisbane, Australia
Schijve, Fatigue of Structures and Materials, Second Edition with CD-ROM, Springer Science + Business Media, B.
Clark, Modelling residual stresses and fatigue crack growth at cold expanded fastener holes, Fatigue and Fracture of Engineering Materials and Structures, 14. 5 (1991), pp. 575-581

Applying advanced research methods based on metallurgical sciences allowed us to conclude on a raw materials used for production of the investigated objects.
The work has been implemented within the framework of statutory research of AGH University of Science and Technology, contract No 11.11.170.318 - 11 AGH.
Aschenbrenner, The Occurence of Metallic Iron in Ancient Copper, Journal of Field Archaeology 2/3 (1975) 251-266
Kacprzak (Eds.), Binary Alloy Phase Diagrams, ASM International, Materials Park, Ohio, 1990
Kruszyński (Eds.), Ancient Caucasian and Related Material in The British Museum, The British Museum Press, London, 2002, pp. 87-98