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Betulin can be used to produce polymer materials [3], as a building block for biologically active compounds.
Materials and Methods Obtaining BOB Extract.
Sofić, Identification and Isolation of Pharmacologically Active Triterpenes in Betuale Cortex, Betula Pendula Roth., Betulaceae, Bosnian Journal of Basic Medical Sciences. 9 (1) (2009)
Falev, Determination of Triterpenoids From Birch Bark by Liquid Chromatography-Tandem Mass Spectrometry, Journal of Analytical Chemistry. 69 (13) (2014) 1264-1269
Moilanen, Betulin Derivatives Effectively Suppress Inflammation in Vitro and in Vivo, Journal of Natural Products. 79 (2) (2016) 274-280

Material resources sharing could fully use depletable resource and maximize effectiveness.
Strategic Management Journal, 2000,21(3):387-404
[4] Luo Y D.Contract, cooperation and performance in international joint ventures[J].Strategic Management Journal,2002,23(10): 903-919
Symbiosis Theory[M].Beijing: Economic Science Press,1998
Journal of Economic Behavior and Organization, 1992,18(1): 1-25.

Introduction Fatigue processes taking place in materials and structural elements are one of the most important issues in the area of knowledge on the maintenance of technical objects.
The monitoring of fatigue is facilitated by the application of experimental methods with the use of optoelectronic technologies that are applied both in fatigue diagnostics of materials and structures as well as local deformation analyses.
The optomechatronic systems for the monitoring of fatigue fracture in materials and structural elements developed jointly by the Institute for Sustainable Technologies – National Research Institute (ITeE-PIB) in Radom and the University of Technology and Life Sciences in Bydgoszcz [2,8] constitute good examples of such solutions.
The article presents a dual-camera vision system for the monitoring of fatigue wear in materials and structural elements developed at the Institute for Sustainable Technologies – National Research Institute in Radom.
[7] Yan J.H., Sutton M.A., Deng X., Wei Z., Mixed-mode crack growth in ductile thin-sheet materials under combined in-plane and out-of-plane loading, International Journal of Fracture, vol. 14 no 4 (2009) 297-321

Designer define initial conditions for generating of artificial planar systems: � planar systems geometry; � number of planar systems elements; � materials, substances used to make systems.
Example of colour codes for all these materials is presented in Fig. 2.
For example, in situation when we have planar systems with n elements and use m materials N = m n patterns is available.
Colour codes for m = 4 materials.
[6] Stephen Wolfram: A New Kind of Science (Wolfram Media, Inc., 2002), p. 1197

Especially， with the rapid development of the semiconductor industry, there's an urgent demand of the abrasive tools that the semiconductor materials could be lapped more high-efficient and high-precision.
The SAP is formed through drying abrasive materials which are bonded with the organic polymer materials.
Yuan, D.Q Yu: Advanced Materials Research,Vol.53(2008), pp. 161-166
Wang: Chinese Journal of mechanical engineering, Vol.43(2007), pp.35-48
Yang: Advanced Materials Research,Vol.53(2008), pp.173-178

Materials and methods High-purity raw materials were used to prepare the Ti-2Mg-22Si-11B and Ti-7Mg-22Si-11B (at.-%) powder mixtures weighing close to 23g, which were handled under Ar atmosphere into the glove box.
Rodrigues: Materials Research Vol. 17 (2013), p. 1
Ramos: Materials Science Forum.Vol. 727 (2012), p. 216
Ramos: Materials Science Forum Vol. 802 (2014), p. 9
Kraus, G.Nolze: Journal of Applied Crystallography Vol. 29 (1996), p. 301.

Introduction The more progress of the society and the development of science and technology, the more widely of electricity used, and then also produced many unsafe factors.
Causes the current increases rapidly in a short time with much heat and soaring temperature, when the temperature higher than the insulation materials fire point, it can burn in case of oxygen.
Material Evidence Extraction Extract Method.
Journal of Chinese People's Armed Police Force Academy,2009(6): 64-66.
[6] Quankun Liu:Material Molding Basic Principle(Mechanical Industry Press,Beijing 2005).

GJJ11589 and the assistance of the Nanchang Key laboratory of Materials Corrosion and Protective Technology.
Some mechanical of borided AISI H13 and 304 steels, Materials and Design, 28(2007) 1836-1843
Study of the thermal fatigue crack initial life of H13 and H21 steels, Materials Processing Technology, 74(1998)23-26
Thermal protection of H13 steel by growth of (Ti,Al)N films by PAPVD pulsed arc technique, Materials Characterization, 59(2008)1070-1077
Influence of Oxidation Temperature on Surface Morphology and Microstructure of Magnetron Sputtered CrTiAlN Gradient Coatings, Transactions of materials and heat treatment, 26(2005) 111-115

Preparation and Microstructure of Pressureless Sintered Si2ON2-SiC Ceramic Huihui Tan 1, a, Zhuxing Tang 1, b*, Xia Zhao 1, c, and He Zhang 1, d 1school of Material Science & Engineering, Shandong University of Technology, Zibo, Shandong, 255049, China atan497976788@163.com, btangzx@sdut.edu.cn, cxzhao126@126.com, dzhanghe1215@163.com * corresponding author: Zhuxing Tang, School of Material Science & Engineering, Shan Dong University of Technology, Zibo, Shandong, 255049, China, tangzx@sdut.edu.cn Keywords: Pressureless Sintering, Si2N2O-SiC Ceramic, Preparation, Microstructure Abstract: This paper introduces Si2ON2-SiC ceramic fabricated by pressureless sintering method and studies the effect of additives, nitriding temperatures on bulk density, porosity, phase composition and microstructure.
Fig. 3A is the profile of raw material after milling for 40 h.
Because amorphous SiO2 is used as raw material, no SiO2 peak can be seen in the figure.
A small amount of Si3N4 peak is appeared due to the nitrided Si in the raw material.
Ge: Journal of Inorganic Materials.

Materials and Characterization Techniques The chalk samples have been taken from a limestone monument, as detachable samples without the architectural value, Figure 1.
Results and Discussion Degradation by crystallization of salts ("salt decay") occurs in porous materials, like natural stone, bricks and mortar.
Sulphates of Na, K, Mg and Ca are the most aggresive because it causes a pronounced weakening of the cohesion of materials.
Rajendran, Growth Characterization Of Calcium Oxalate Monohydrate Crystals Influenced By Costus Igneus Aqueous Stem Extract, International Journal of Pharmacy and Pharmaceutical Sciences. 4 (1) (2012), 261-270
Chinese Science Bulletin, 48(17) (2003), 1844-1852