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Recently, the disadvantages of one reactive material have been eliminated by a combination of several materials.
Materials and Methods CCM is a reactive material characterized by lower crystallinity of MgO.
Physico-chemical properties of reactive materials are summarized in Table 1.
Physico-chemical properties of the reactive materials.
Anousis, Thorium and uranium uptake by natural zeolite materials, Science of Total Environment Journal 173/174 (1995) 237-246

The tensile tests of sheet metal of two different materials, 08 boiling steel and 1Cr18Ni9Ti, are taken under 3 directions.
Solids.49 (2001) 1727–1746 [4] Gilles Rousselier: Handbook of Materials Behavior Models. 2001, 436-445 [5] E.
Kushwaha: Materials Science and Engineering.
Michel-Ponnelle: Computational Materials Science. 45 (2009) 762–767 [9] M.K.
Roos: International Journal of Mechanical Sciences. 51 (2009) 619–630 [10] Mediavilla, J., Peerlings, R.H.J., Geers, M.D.G.: Comput.

Bandyopadhyay, "Additive manufacturing of biomaterials," Progress in Materials Science, vol. 93, pp. 45-111, 2018. https://doi.org/10.1016/j.pmatsci.2017.08.003 [41] X.
Lupoi, "Solid-state additive manufacturing and repairing by cold spraying: A review," Journal of materials science & technology, vol. 34, no. 3, pp. 440-457, 2018. https://doi.org/10.1016/j.jmst.2017.09.015 [46] T.
Hague, "3D printing of Aluminium alloys: Additive Manufacturing of Aluminium alloys using selective laser melting," Progress in Materials Science, vol. 106, 2019. https://doi.org/10.1016/j.pmatsci.2019.100578 [60] Y.
Fraser, "Direct laser deposition of in situ Ti–6Al–4V–TiB composites," Materials Science and Engineering: A, vol. 358, no. 1-2, pp. 343-349, 2003. https://doi.org/10.1016/S0921-5093(03)00299-5 [65] D.
Hague, "3D printing of Aluminium alloys: Additive Manufacturing of Aluminium alloys using selective laser melting," Progress in Materials Science, vol. 106, p. 100578, 2019. https://doi.org/10.1016/j.pmatsci.2019.100578 [72] M.

A measurement method for loss factor of viscoelastic material was researched.
Introduction Transverse wave and longitudinal wave is a kind of elastic acoustic wave in viscoelastic material and elastic material.
Elastic acoustic wave can be excited when acoustic wave incidents to the surface of viscoelastic material or elastic material at a certain angle [1-3].
Acknowledgements This work is supported by science and technology on underwater acoustic laboratory under grant 9140C200105120C2001.
References [1] Yexin Xing, Guowei Luo: International Journal of Digital Content Technology and its Applications.

The material development can provide all types of fossil fuels, metal ores, building materials and non-metallic mineral to meet the needs of region and outside region.
The natural environment system is the supply station of raw materials, and it is also the disposal sites of waste.
Classification of material stock: ①stock increase: construction and infrastructure (building materials, metals and others), machinery and durable materials (metal and other materials); ②stock reduction: the demolition of construction and infrastructure (building materials, metal and others); ③The net change of stock: the net change of construction and infrastructure inventory and others.
The physical economy of the European Union Cross～country comparison and determinants of material consumption [EB/OL]. http://www.Elsevier.com/locate/ecolecon, 3:12(2006) [4] Xiaoqiu Chen, Lijia Qiao: submitted to Journal of Natural Resources, 15 (1):17-23(2000).
(In Chinese) [5] Xiaoqiu Chen, Tingting Zhao: submitted to Peking University (Natural Science), 7 (4):538 -547(2003).

In this paper, ceramic balls, made of natural mineral materials, are chosen as activating material.
Materials and Methods 2.1 Materials and reagents Kunming mice were bought from Animal Science of Health Science Laboratory in Peking University.
Results and Discussion 3.1 Changes of parameters of water After flowing through the activating materials, the properties of water are changed by them.
Wang, et al.: Journal of Functional Materials, Vol. 40(2009), p. 556 [8] J.S.
Ding, et al.: Advanced Materials Research, Vol. 178 (2011), p. 86 [11] D.Y.

Biopolymers are the materials that are decomposed by microorganisms and obtained from renewable and non-renewable raw materials, as well as the materials that are not decomposed by microorganisms, but obtained from renewable resources.
Traditional polymers are made from petrochemical raw materials.
Galyavetdinov, Design of packaging materials based on polylactide and wood filler, International Journal of Engineering and Technology (UAE), pp. 1089–1091, 2018
Martin, Coextrusion of biodegradable starch-based materials.
Voronin, Analysis of physico-mechanical properties of composites based on polylactide and thermally modifie wood fibers, Materials Science Forum, pp. 202-206, 2016

Materials and methods 2.1.
The water absorption of the untreated coconut sheath fiber reinforced composite materials is high compare to the alkali treated coconut sheath fiber reinforced composite materials.
Hamdan, The effect of alkali treatment on tensile properties of sugar palm fibre reinforced epoxy composites, journal of Materials & Design, Volume 29, Issue 7, 2008, pages 1285-1290
Influence of alkali treatment and fibre length on mechanical properties of short agave fibre reinforced epoxy composites, Journal of materials & design, Volume 32, Issue 8-9, September 2011, page 2629-4640
Roatgi, Kalyani Vijayan, Structure property studies of fibres from various parts of the coconut tree, Journal of material science, August 1982, Volume 17, Issue 8, pp 2453-2462

Introduction Ceramic perovskite-type oxides with formula ABO3 (A is usually a rare earth element and B is transition metal) has been found to be outstanding candidates for intermediate temperature solid oxide fuel cell (IT-SOFC) cathode materials.
Experimental Procedure Powder of La0.6Sr0.4CoO3-α was prepared via a complexing method using metal nitrate salts as starting materials and CA-EDTA as a combined chelating agent.
Zhu: Progress in Materials Science 57 (2012), p. 804-874
Mia: Journal of Power Sources 173 (2007), p. 837-841
Wang: Journal of Power Sources 185 (2008), p. 609-614

Fiber Concrete on the Basis of Composite Binder and Technogenic Raw Materials S.V.
Lemm, Fiber-Reinforced Concrete: Principles, Properties, Developments and Applications (Building Materials Science), William Andrew; illustrated edition Feb. (1990) 194
Durachenko, High-Strength Fiber-Reinforced Concrete Containing Technogenic Raw Materials and Composite Binders with Use of Nano-dispersed Powder, Research Journal of Applied Sciences. 9 (2014) 1153 – 1157
Durachenko, Fine-Grain concrete reinforced by polypropylene fiber, Research Journal of Applied Sciences. 10 (10) (2015) 624 – 628
Durachenko, The Development of textile fine-grained fiber concrete using technogenic raw materials, Research Journal of Applied Sciences. 10 (10) (2015) 701 – 706