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The usage of dentin replacement material was recommended in this case.
Root canals were obturated using single cone technique preceeded by the application of epoxy resin sealer (Topseal, Dentsply) The obturation material was cut 2 mm below the orifice then sealed with glass ionomer cement (Figure 6).
Journal of Advanced Medical and Dental Sciences Research.
[2] Rajendra Kumar Tewari, Surendra Kumar Mishra, Swati Sharma, Pankaj Kharad, 2012, Nonsurgical Endodontic Retreatment: A Case of Dental Quackery, International Journal of Experimental Dental Science, January-June 2012;1(1):34-36
[13] Sufyan Garoushi, Enas Mangoush, Pekka Vallittu and Lippo Lassila,, 2013, Short Fiber Reinforced Composite: a New Alternative for Direct Onlay Restorations, The Open Dentistry Journal, 7:181-185

Pretreatment of high strength ammonia removal from rare-earth wastewater by magnesium ammonium phosphate (MAP) precipitation Hao Wang1,2,a, Guanwen Cheng1,2,b, Xiaowei Song1,2, Zaihan Xu1,2, Jinjie Meng1,2, Chuanqiang Dong1,2 1Guangxi Key Laboratory of Environmental Engineering, Protected Assessment, Guilin, China 2College of Environmental Science and Engineering, Guilin University of Technology, Guilin, China a jasson1124@163.com, b chenggw@glite.edu.cn Keywords: Rare earth wastewater; MAP precipitation; high strength ammonia; pretreatment Abstract: Ammonia is one of the most important contaminants affecting the quality of water environment.
In this paper, applying magnesium ammonium phosphate precipitation for removing high ammonia nitrogen from rare-earth wastewater and investigating the pH, reaction time, and the molar ratio of magnesium and phosphate to effect on removing ammonia nitrogen and getting the best results to reduce the ammonia nitrogen concentration for follow-up treatment Materials and methods Characteristics of raw rare-earth wastewater The wastewater is collected from the effluent of extraction of rare earth elements factory.
Journal of hazardous materials, 156(1-3), 163-9
Journal of hazardous materials, 166(2-3), 911-5
Water science and technology : a journal of the International Association on Water Pollution Research, 59(6), 1093-9

Owing to the possession of transportation proteins of organic acids in methanogens [6] , therefore, it is rational to investigate the effect of supplies of these materials on biogas yield.
Material and Methods Experiment material .
As was introduced earlier, owing to the possessions of transportation proteins of organic acids [6] and a partial reductive tricarboxylic acid cycle [3,4] that is related to cell growth and biogas synthesis in M. soehngenii, therefore, regulatory factors addition acted as extra carbon and energy materials that may facilitate carbon flux in tricarboxylic acid cycle [5].
D20081401 and Grant No.Q20101401), Department of Housing and Urban-Rural Development of Hubei Province science project (Grant No.
Zhou, “Complete genome sequence of the genetically tractable hydrogenotrophic methanogen Methanococcus maripaludis”, Journal of bacteriology, vol. 186, no. 20, pp. 6956,2004 [3] K.S.

The results indicated that WD-50 (with the content of 2 wt%) and HDPE-g-MA (with the content of 10 wt%) effectively improved mechanical properties of the composite materials.
Experimental 2.1 Materials HDPE was supplied by China National Petroleum Corporation.
WD-50 was purchased from Hubei Wuhan University Silicone New Material Corporation Ltd.
Unnotched Izod impact strength tests were conducted with an impact tester XJJ-5, Hebei Changde Materials Laboratory Machines Plant according to ASTMD 256-97 at room temperature.
Journal of applied polymer science, Vol. 104 (2007), p.3161 [9] Zhao YS, Wang KJ, Zhu FH, et al.

Sintering is one of important links to provide blast furnace raw materials.
Sintering is one of vital links to provide blast furnace raw materials.
Raw materials and fuel for experiment were provided by Tangshan Iron & Steel Group.
In this zone, alkaline substance such as active lime and liquid water in sintering materials absorbed a large amount of SO2.
Journal of Chemical Engineering of Chinese Universities.

Materials and Methods Excess sludge.
Journal of chemical and environmental protection (Chinese).
Chinese science bulletin (Chinese), Vol.50 (2005), p2734
Journal of environmental science (Chinese), Vol.27 (2006), p319
Journal of environmental science (Chinese), Vol.29 (2008), p327.

Materials and methods 2.1 site description The study was conducted in the ecological experimental site in the Hailiutu watershed in central China (38.4°N，109.2°E ).
Geo-spatial Information Science 11 (2): 112-120 [3] Lamb, D., Erskine, P.D., Parrotta, J.A., 2005.
Science 310, 1628–1632
Science 310, 1944–1947
Chinese Journal of Applied ecology, 20(9): 2111-2117 (in Chinese)

With the continuous development of materials science, the application of ultra-thin railway wind-break wall and railway bridge wind-break wall will become a trend.
Tomasini: Journal of Wind Engineering and Industrial Aerodynamics Vol. 98 (2010), p.189
In Chinese [9] Cuixiang Jiang, Xifeng Liang: China Railway Science Vol.27 (2006), p.66.
Munday: Journal of Wind Engineering and Industrial Aerodynamics Vol.92 (2004), p.547.
In Chinese [12] Fenghua Liu: Journal of central South University: Science and Technology Vol.37 (2006), p.176.

Among the highway, the section of Wenchuan to Li County will face a lot of problems because of the limit of complicated terrain, geological condition, hydrological conditions and local building materials.
Gabion retaining wall has advantages such as adaptability, uniformity of bearing capacity and low demand from local materials, etc. it can be in widely used in mountain road slope protection and retaining engineering.
Journal of Chongqing Jiaotong University (Natural Science), 2010, 29(3): 433-436.
Chinese Journal of Rock Mechanics and Engineering, 2008, 27(12): 2585-2592.
Chinese Journal of Rock Mechanics and Engineering, 2008, 27(9): 1781-1791.

Although reinforced concrete material is belonged to hot inert materials, material performance will deteriorate seriously because of the high temperature effect, and severe stress redistribution in structure will occur, which weakens structure performance greatly, and endangers the safety of structure.
Thermal performance of reinforced concrete materials under fire The internal temperature reaction of structure and member under fire depends on not only the temperature condition of structure external but the thermal performance of structure external [4].
When the basic heat equation is established, it mainly involves three thermal performance of materials: coefficient of heat conductivity, heat capacity and mass density.
Another basic thermal parameter of material is expansion coefficient, which affects the temperature deformation and stress of materials and structure only, and has nothing to do with temperature field analysis
Fire Safety Journal 42 (2007) 139–149 [4] L.Z.