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PCC in calcite structure was extracted from limestone by calcination at 900 °C for 3 h, dissolved in 0.8 M nitric acid solution and followed with carbonation for 60 minutes.
The results showed that the PCC dominated calcite structure was obtained with 75.25% in yield and 99.42% in purity.
The structure of calcite phase namely a rhombohedral, cube crystal form is agreed with the previous result reported by Aziz [10].
The acid-catalyzed reaction produces a branched gel structure due to its fast hydrolysis, while the base-catalyzed reaction produces a dense material [12].
Coleman, The hydration chemistry of proroot MTA, Dent.

Oxygenates are the fuel additives that contain oxygen as a part of their chemical structure.
Industrial and Engineering Chemistry Research. 36, 1870-1881
Industrial and Engineering Chemistry Research. 41, 3784-3796
Industrial and Engineering Chemistry Research. 42, 3584-3591
Industrial and Engineering Chemistry Research, 44, 3134-3145

Synthesis and Electrochemical Performance of Amorphous Nickel Hydroxide Codoped with Fe3+ and PO43- Changjiu Liu1,2, a, Shijuan Chen1, b, Dan Ma1 and Yanwei Li1, c 1College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China 2Key laboratory of new processing technology for nonferrous metals and materials, ministry of education, Guilin University of Technology, Guilin 541004, China aliuchj_1229@163.com, bchenshijuan11@163.com, clywhit@126.com Keywords: Amorphous Nickel Hydroxide, Codoping, Structure, Electrochemical Performance Abstract.
Therefore, the exploration of Ni(OH)2 with novel structure has become the key to solve the above problems.
The crystal structure of the prepared nickel hydroxides were determined by X-ray diffraction (XRD) analysis using an X'Pert Pro diffractometer, with a Cu Kα radiation source.
The broad and diffuse peak, namely featureless appearance, is typical of amorphous structure [8].
To obtain further information on the structure of the prepared nickel hydroxide, Raman spectroscopy was performed as shown in Fig.3b.

Whereas SWCNTs are made of one tubular structure, MWCNTs consist of concentrically arranged carbon tubes with a typical spacing of ≈ 0.34 nm between the different layers [3].
The effects of material composition and porosity on the scaffold pore structure and mechanical properties were studied.
There was minimal infiltration of CNTs into the microscopic pores of the glass structure and CNTs formed a surface nanoscaled fibrous pattern.
As shown in the literature [86, 105, 106], the CNT mesh can be used to induce the ordered growth of a nano-HA surface layer to provide a nanostructured topography that resembles closely the surface of bone in its chemistry, crystallinity and morphology.
The analyses showed that protein adsorption is mediated by two independent contributions from surface chemistry (hydrophilicity, SFE) and surface roughness accounting to 70 % and 30 %, respectively.

The Fe/SiO2 powders showed an intricate long-stand structure attributed to their magnetic characteristics.
It showed intricate long stands structure because of intrinsic magnetic properties of Fe and agglomeration of the nanopowders itself.
In this figure, the shell showed random structure, i.e., amorphous phase.
The size of the Fe nanocomposite was about 50nm at 1100 o C, and it showed intricate long stands structure because of intrinsic magnetic properties of Fe.
Andreva, Chemical Properties of Inorganic Materials, Moscow Chemistry, Russia, 2000.��

Influence of sonomechnical treatment on the structure of cellulose micro/nano fibrils Wu Yan1a, Wu Zhi-hui1b, Zhang Xu-jun2c, Zhang Ji-lei3d, Yan Xiao-xing1e 1 College of Furniture and Industrial Design, Nanjing Forestry University, Nanjing, 210037 2 Zhejiang Sunon Furniture Manufacture Co.
Ltd, Hangzhou, 311200 3 University of Mississippi, MS, 39759-7875 ajudy_nanjing@hotmail.com, bwzh550@sina.com, czhangxujun@sunon-china.com, djzhang@missipi.edu, eyanxiaoxing@nuaa.edu.cn, Keywords: cellulose, micro/nano fibrils, structure, sound chemical processing, affecting Abstract: The fast-growing Eucalyptus (E.
Role of the alkali cellulose, cellulose chemistry occurs to generate new compounds - alkali cellulose; cellulose physical and chemical effects occur swelling of cellulose produced and partially dissolved (low molecular weight fraction); cellulose is a major glucose molecules change the position of each group to generate a variant of the structure, and these effects occur accompanied by an increase in cellulose reactive.

The endoprotheses fixation technique allows the direct contact between the metallic implant and the surrounding tissue and it is influenced by the surface chemistry, surface energy, topography and roughness of the implant [5]–[7].
Electron beam (EB) structuring represents a novel technique for controlled surface structuring for biomaterials.
An inward (wall structure) and outward structure (pin structure) were used for this study.
The structuring increased the true area of the surface with respect to the projected area, as compared for both type of structuring in Table 1.
Figure 2: EB structured Ti6Al4V; a): pin structure b): wall structure Table 1: Pin height / wall depth and area increase due to EB structuring beam travel direction pin height wall depth [µm] true area [µm2] projected area [µm2] area increase [%] pin-structure + 307 13 11 18 wall-structure - 452 12 11 9 n-TiO2/Chitosan composite coating.

Introductions It is pointed out that layered structure hybrids have quantum well structures and this is much attractive.
The SEM image of (C12H25NH3)2FeCl4 (Figure 1) shows its sheet-like structure, with several cloven, turndown and very thin sheets.
The layered structure is also confirmed by the XRD patterns (Figure 2) Fig.1 SEM image (×5000) of (C12H25NH3)2FeCl4, shows the sheet-like structure with several very thin sheets, cloven and turndown.
The series of (00l) diffractions in XRD patterns demonstrate that the compound takes typical layered structures either in phase�(<60o C) or in phase�(>60o C).
Matzi: Progress in Inorganic Chemistry, Vol.48, Edited by Kenneth D.

The bush is fabricated with a new structure that a relatively large straight groove is opened in its upper part.
The bush is with a new structure.
The new structure of the bush is shown in Fig. 2.
Schematic of new structure of the bush Fig. 3.
Russian Journal of Applied Chemistry.

The molecular structure of the filler and the silicone rubber were characterized by FTIR.
The molecular structure of the filler was characterized on a Nicolet AVATAR 360FT Spectrometer, with the scanning range between 4000～400cm-1.
The absorption between 11000 cm-1 and 1001 cm-1 belonged to the vibrations of Si-O bond in Si-O-Si structure.
The morphology and the structure were characterized.
Lauterbur: Industrial and Engineering Chemistry, Vol. 47 (1955) p. 486