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Dibromoneopentyl glycol was also prepared in 91.7% yield with pentaerythritol and hydrobromic acid as material and diethyl sulfate as catalyst under reflux for 10 hours.
The materials and catalyst involved the reactions are all expensive.
Illustration on Synthesis Route of Montelukast Sodium, Journal of China Medicine, 2009,40(1):64-66
[4] Sampson A,Holgate S, Leukotrience modifiers in the treatment of asthma, British Medical Journal,1998,316(5):1257—1258
Organic Preparations and Procedures International: The New Journal for Organic Synthesis, 1981, 13(1): 13-18

The materials loss the original structure and could not bear load any more.
Journal of Composite Materials, 2006. 40(14): 1287-1299
Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing, 2008. 472(1-2): 52-58
Journal of Materials Science, 2000. 35(24): 6151-6154
Journal of Composite Materials, 2013, doi: 10.1177/ 0021998312473859

[5] V.L.Mathe, R.B.Kamble, Anomalies in electrical and dielectric properties of Nanocrystalline Ni-Co spinel ferrite, Materials Research 43(2007) 8-9
John Berchmans, S.Angappan, K.Subramanian,C.O.Augustin, Combustion synthesis and characterization of Sn4+ substituted Nanocrystalline NiFe2O4, Material Science and Engineering B 119 (2005) 119-124
[14] I.H.Gul, A.Z.Abbasi, F.Amin, M.Anis-ur-Rehman, A.Maqsood, Structural, magnetic and electrical properties of Co1-xZnxFe2O4 synthesized by co-precipitation method, Journal of Magnetism and Magnetic materials 311 (2007) 494-499
[16] A.Mumtaz, K.Maaz, B.Janjua, S.K.Hasanain, M.F.Bertino, Exchange bias and vertical shift in CoFe2O4 nanoparticles Journal of magnetism and magnetic materials 313 (2007) 266-272
Murthy, Electrical properties of Mn added MgCuZn ferrites prepared by microwave sintering method, Journal of Magnetism and Magnetic Materials,    283 (2004) 109-116. [28] P.V.Reddy, T.S.Rao, Dielectric behaviour in Co-substituted NiSb ferrites, Journal of Materials Science Letters, 16 (1997) 1076-1079

As a new kind of materials, nanoscale zero-valent iron which had excellent adsorption ability and high chemical reactivity had been widely applied in advanced wastewater treatment.
This makes the nano-iron materials with excellent surface adsorption ability and high chemical reactivity [5],which can be more effective to remove pollutants from wastewater [6].
These methods tend to have high yield, simple operation, and can prepare a high melting point of elemental or alloy nano-materials which is difficult to be prepared by conventional methods.
Journal of Nanoparticle Research,2003,(5):323~332
Chemistry of Materials,2001,13,(2):479~486

The defects in crystalline materials significantly affect the fracture behaviors.
Wang, Computational Materials Science 12 (1998) 73
Miyazaki, Computational Materials Science 31 (2004) 269
Dahi, Mechanics of Materials 38 (2006) 243
Bulatov et al., Journal of Nuclear Materials 323 (2003) 281

The main conclusion is that when the thickness of micro-beam is close to the characteristics size of the materials, the natural frequency will show a significant scale effect phenomenon.
Then considering the characteristic length of the selected materials, it goes on to explore the relationship between the micro-beam thickness and natural frequency and analyze the remarkable scale effect of the natural frequency embodied in the micro-dimension.
In particular, the quantitative analysis model between the natural frequency and the intrinsic characteristic length of micro-beam materials is established.
A microbend test method for measuring the plasticity length scale :Acta Mater Vol.46(1998),p. 5109 Acknowledgement This work is supported by National Nature Science Foundation of China under Grant No. 10972056 and Natural Science Foundation of Fujian Province under Grant No. 2008J0141 Author Biographies Meiqin Chen(1984-),female, a master of machine design and theory.
The main study field is mechanics of MEMS and micromechanics of materials.

Materials and Methods Materials.
Acknowledgement This work was supported by National Natural Science Fund (20976061), Guangdong National Natural Science Fund (9151063201000066) and the Fundamental Research Funds for the Central Universities, SCUT (2009ZM0326).
Coulon: Journal of biotechnology Vol. 101 (2003) p. 29 [7] B.
Noor: Journal of Fundamental Sciences Vol. 6 (2010)
Kolisis: European Journal of Lipid Science and Technology Vol. 103(2001) p. 655

Fiber is one of the materials that produced a large amount yearly.
The findings of the study revealed that using biodegradable waste materials for development will transform virgin resources into sustainable materials while also lowering costs.
However, we may combine two materials to examine the efficacy and characteristics of concrete.
Building insulation materials based on agricultural wastes.
Deepak Singh Rathore, ‘International Journal of Engineering Sciences &Research Technology IJESRT Chief Editor’, Int.

Inorganic pillared montmorillonite attracted widespread attention in mineralogy, chemistry and materials science because of its large surface area, excellent thermal stability and adsorption.
Experimental Raw Materials.
The X-ray diffraction analysis result of raw materials is shown in Fig.1.
MICHAL: Microporous and Mesoporous Materials, Vol.37 (2000), p.187
,Chinese Academy of Sciences, China 2007), p.60

In the present paper, a new inversion method of optical constants of semitransparent materials was introduced based on transmittance spectrograms of double slabs of semitransparent materials, and validation of the new inversion method was investigated.
Conclusions (1) The new inversion method based on transmittances of double slabs in this paper combined with experiment can acquire the optical constants of solid materials
Siegel: International Journal of Engineering Science Vol. 36 (1998), p. 1701 [2] A.
TAO: Journal of engineering thermophysics Vol. 32 (2011), p. 1737 [4] M.
Ronald: Journal of Quantitative Spectroscopy & Radiative Transfer Vol. 18 (2009), p. 2135 [5] M.