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This is because the rubber compound network structure is easy to be destroyed at low frequency and the internal friction and internal heat increase, which makes the elastic modulus lower and loss factor (tan δ) higher.
While in high frequency, the rubber compound network structure is not easy to be destroyed and the internal friction is small, which makes the elastic modulus higher and loss factor (tan δ) lower [7].
Gan: Journal of Macromolecular Science-pure and Applied Chemistry, Vol.33 (1996), p. 1939 [3] P.

Spectrophotometric Determination of 6-Mercaptopurine in Pharmaceutical Sample using Fe(III)-Potassium Ferricyanide System Changqing Tu1,a and Xinrong Wen1,b 1College of Chemistry and Environment,Jiaying University,Meizhou, Guangdong 514015,P.
The molecular structure of 6-MP 6-mercaptopurine(6-MP,the molecular structure of 6-MP is shown in Fig. 1) is a kind of purine anti-metabolite drugs,it has an inhibitory action on many kinds of tumor.It is widely used in the clinical treat- ment of acute leukemia, neoplasms of chorionic epithelium, malignant hydatidi-form mole,and so on.

References [1] Han Y P, Han Y, Li R H, Wang L M, Application of X-ray digital radiography to online automated inspection of interior assembly structures of complex products.
Transparent ceramics: Processing, materials and applications, Progress in Solid State Chemistry 41 (2013): 20-54
Luminescent Spectroscopy and Structure of Centers of the Impurity Eu3+ Ions in Lead Tungstate Crystals.

Mechanism and preparation methods of inorganic fire-retardant Tingting Tang1,a, Xingyong Liu1,band Shixiong Hao1,c 1College of Materials and Chemistry Engineering, Sichuan University of Science and Engineering, Zigong 643000, China aTingtingtang123@163.com,bliuxingyong@sina.com, cshxionghao@126.com Keywords: Flame retardants, Mineral filler, Modification Abstract.
The surface electronic structure and crystal structure of mineral filler flame retardant were significantly changed after ultrafine treatment and their special performance in magnetism, light absorption, catalysis, chemical activity, and electricity were showed.

Taufiqurrohmana, Karna Wijayab*, Asma Nadiac, Susi Efrina Purbad, and Akhmad Syoufiane Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia amuhammadtaufiq716@gmail.com, b*karnawijaya@ugm.ac.id, casmanadia@mail.ugm.ac.id, dsusipurba97@gmail.com, eakhmadsyoufian@ugm.ac.id Keywords: Nickel, natural zeolite, hydrocracking, LDPE.
This shift caused by dealumination which was related to the release of alumina from the zeolite framework structure becomes Al non-framework [9].
The impregnation process into ANZ did not damage the structure of natural zeolite and could increase the selectivity towards gasoline fraction for hydrocracking reaction.

Its composition and biological structure resemble natural bone [1].
Solid-state double nuclear magnetic resonance study of the local structure of calcium phosphate nanoparticles synthesized by a wet-mechanochemical reaction.
Journal of Physical Chemistry B, 106(20):5169-5176 [5] Kumar, G.

The obtained CA/TiO2/WO3 electrospun nanofibers were then calcined in carbolite oven at 400 ◦C for 3 hours under controlled Ar gas for the remove CA. 2.3 Characterization and photocatalytic activity testing The crystal structure of TiO2/WO3 powder (prepared by TiO2/WO3 solution was calcined in carbolite at 400 ◦C for 3 hours) in various ratio was evaluated by XRD (D8DISCOVER, Bruker axs).
The absence of the well defined crystal structure of TiO2/WO3 could be due to the interaction between TiO2 and WO3 crystal or TiO2/WO3 partially formed a solid solution.
Xiao, Jide Wang, “Synthesis of TiO2–WO3 nanocomposites as highly sensitive benzene sensors and high efficiency adsorbents”, Journal of Materials Chemistry 22 (2012) 123914-13917

The material usually has macroporous structure, pores with radius of 4 - 40 microns make about 15% of summary volume of pores.
Results of microscopic researches of particles of the initial diatomaceous earth "Celite 545 VO" which uses: 1 – shutters of diatoms; and 2 – arranged porous structure as the filtering material.
Chemistry and technology of water, 5 (1989) 407-421

There are spinel crystals in the inner of CA6 crystal, which appears network structure.
Besides, sintering of alumina-rich spinel is difficult, which may be related to its structure.
Materials Chemistry and Physics. 2003.78(8):30-37

A 2100F transmittance electron microscope (JEOL, Japan) was utilized to observe the morphology and crystal structure.
The lattice fringes observed in both images are approximately 0.29nm, which agree well with the (200) lattice plane of the cubic structure of PbS [23].
De Geyter, et al., Size-Tunable, Bright, and Stable PbS Quantum Dots: A Surface Chemistry Study, Acs.