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Facile Synthesis Silica Nanoparticles from Indonesia Silica Sand and their Physico-Chemical Properties Agus Ismail1,a, Ariffinisa Lintang Widyaningtyas2,b, Bambang Heru Susanto1,c and Mohammad Nasikin1,d* 1Department of Chemical Engineering, Universitas Indonesia, Depok 16424, Indonesia 2Department of Chemistry, Universitas Indonesia, Depok 16424, Indonesia aagus.ismail@ui.ac.id, bariffinisa.lintang@sci.ui.ac.id, cbambanghs@che.ui.ac.id, d*mnasikin@che.ui.ac.id Keywords: Silica nanoparticles, Silica sand, Sodium silicate solution, Sol-gel method, Alcohol Abstract.
The dry white silica was characterized using X-Ray Diffraction (D8 Advance) to confirm the crystal structure of silica particles.
The crystal structure of silica nanoparticles should be on the features of amorphous siliceous products that are confirmed with the previous study was reported on amorphous silica [16].
However, the dominant results appeared is the crystal structure of a side product that was formed during the synthesis of silica nanoparticles.
The presence of these peaks indicates the structure of sodium nitrate (NaNO3) was formed during the reaction between sodium silicate solution and HNO3 which is based on JCPDS reference (01-079-2056) as shown below. 2NaSiO3 + 2HNO3 à 2NaNO3 + 3SiO2 Fig. 2 XRD pattern of silica nanoparticles.

Introduction AZ31magnesium alloy has few activated slip systems and poor plastic deform property owing to its hcp (close packed hexagonal) crystal structure in the room temperature[1-3].
Especially, the twinning became an important deform model when the structure of AZ31 magnesium alloy was non-uniform, for example, there were some large gains in the structure and that would make a large effect on the deform models and mechanical properties.
So, in the present work, the impact materials was AZ31 magnesium alloy after hot extruded and its structure included large grains which elongated along extrusion direction and small equiaxed grains after re-crystallization.
Huang, Materials Chemistry and Physics 81 (2003) p.11 [4] E.

The molecular structure of its constituents has high degree of polymerization, so in normal conditions these constituents do not substantially form chemical bonds with other materials.
Some of these radicals interact with each other, forming a three-dimensional molecular structure of the bitumen, which leads to a reduction of its ability to deformation.
Others components interacting between each other, create three-dimensional structures therein, which makes the bitumen layer is less deformable.
Change of the supramolecular structure of bitumen leads to change in the mechanical and thermal properties of the compound.
Colloid chemistry of polymers.

SAXS technique from synchrotron radiation source was used to evaluate the PVA and PVA/GA hydrogel structure at the nano-order level and investigate the BSA immobilization.
Such trend can be explained by assuming a semi-crystalline structure of PVA polymer, where hydrogen bonds are very important on stabilizing polymer structures.
Therefore, we may assume that the slope changes verified to be caused by breaking the nano-ordered spherical semi-crystalline structure previously found in the pure PVA with the immobilization of globular BSA protein into the hydrogel matrix.
[5] John Coates, In Encyclopaedia of Analytical Chemistry, R.A.

The $tomic )orce 0icroscopy (AFM) Characterization of Ni(phen) 2+ 3 Fixing Effects on DNA molecules Hao Wang 1 2 * , Yangzhe Wu 3, Zhijun Song 4, Gucheng Zeng 3 Xueyi Le 4 and Jiye Cai 3 1 School for Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510631, China 2 Institute of %iomedical (ngineering, Jinan University, Guangzhou 510632, China 3 Department of Chemistry, Jinan University, Guangzhou 510632, China 4 College of Science, South China Agricultural University, Guangzhou 510642, China Abstract: In this paper, the fixing and stretching effect of Ni (phen) 2+3 with different methods on DNA had been studied by Atomic Force Microscope (AFM ).
Atomic force microscopy (AFM) is extensively employed as a versatile tool for the visualization of the structure of biomacromolecules and the interaction of biomacromolecular complexes[1-3].
DNA molecules intended to elongated structure compared with sample 1 because of flow-induced effect.
Result of sample 3 was shown as Fig 3, which shows DNA molecules conjugated as net structure with the present of complex.
With the lack of a proper sample treatment method, it is difficult to investigate the structure of large DNA molecules, for example, the complications are unavoidable when one investigates physical properties of large DNA molecules, due to the fact that the longer are the DNA strands, the stronger is the tendency to form entanglements and supercoils under normal conditions[12].Recently, many physical and chemical approaches have been used to stretch or extend DNA molecules to obtain detailed structural information on DNA molecules or its complexes.

The shear viscosity is a reflection of its inherent structure.
The polymer fluid can be regarded as a network structure with transient nature.
Fan, Effect of flocculated structure on rheology of poly(butylene terephthalate)/clay Nanocomposites, CN.
Scarfato, L.Scatteia, G.Costa, Effect of the organoclay structure on morphology and rheological response of PBT nanocomposites, Italy.
Pourcelle, Surface functionalization of a poly(butylene terephthalate) (PBT) melt-blown filtration membrane by wet chemistry and photo-grafting.

In vitro bioactivity of Atomic Layer Deposited titanium dioxide on titanium and silicon substrates Jannica Heinrichs1, a, Tobias Jarmar1,2,b , Mårten Rooth 3,c and Håkan Enqvist1,2,d 1 Engineering Sciences, Uppsala University, Box 534, SE-75121, Uppsala, Sweden 2 Doxa AB, Axel Johanssons gata 4-6, SE-75451, Uppsala, Sweden 3Materials Chemistry, Uppsala University, Box 534, SE-75121, Uppsala, Sweden a jannica.heinrichs@angstrom.uu.se, btobias.jarmar@doxa.se,c marten.rooth@mkem.uu.se, d hakan.engqvist@angstrom.uu.se Keywords: Bioactivity, Atomic layer deposition (ALD), coating, TiO2, anatase, rutile Abstract.
The crystal-structure of anatase TiO2 has a better agreement with the HA crystal-structure than the rutile has [4].
The HA formation on the surfaces was characterised with GI-XRD analysis and scanning electron microscopy (SEM). 2 4 1 3 Results X-ray diffraction was used to analyse the crystal structure of the surface film before soaking in PBS.
HA with water in the structure could be more fragile or less stable than dried HA.

Its hardware structure is given in Figure 1, and its product photo is given inFigure 2.
Figure 1 Hardware structure of the upper computer Figure 2 Product photo of the upper computer The lower computer is used to detectenvironment parameters and control executing agency in fish pond.
Its hardware structure is given inFigure 3, and its product photo is given inFigure 4.
The MCU not only can receive the commands from the upper computer through PTR2000, but also accept the instruction from thekeyboard outside the shell to control the executing agency.While it usually Figure 3 Hardware structure of the lower computer Figure 4 Product photo of the lower computer display one upper computer at the operation home, the lower computer may be several arranged in the pond.
Kelderman: Physics and Chemistry of the EarthVol.33(2008), p.655 [4] L.

These materials have a great potential to contribute to desired chemistry in the contact zone to tissue.
Bone ingrowth towards the apatite allows the new bone structure to come in integrated contact with the biomaterial.
Bone ingrowth towards the CA-based material allows the bone structure to come in integrated contact with the apatite-containing biomaterial.
Fig. 3 The integrated structure of CA-based material to bone tissue (rabbit, tibia, [10]) Mechanism 6.
The latter varies from a cellular-free high content apatite tissue in the case of a dental enamel, via dentine to a bone structure with cellular and body liquid contact.

XRD analysis of Reis Marble tailing indicated that; the tailing was calcium carbonate with a crystal structure.
Diatomite belonging to Afyon İsçehisar Seydiler area has a amorphous structure, protected it's structure up to 1000 °C, above this temperature, this structure transformed into cristobalite.
West, Solid State Chemistry and Its Applications; pp. 41-42.