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Introduction Hydrogels are three-dimensional macromolecular networks that contain a large fraction of water within their structure, do not dissolve, and are soft, solid-like materials.
PNIPAm having a lower critical solution temperature (LCST) around 32℃[10, 11] in aqueous solution can be utilized for their specific swelling and drug release properties in response to temperature, its network structure demonstrates unique thermal volume transitions (hydrogel shrinking) near its LCST.
Besides, their small dimensions in micrometer order or less simultaneously offer considerable advantages over macrogel type structure, especially in terms of a wide variety of potential applications [9].
The morphology of the pure crosslinked PVA (Fig.2(H0)) exhibit a very smooth surface, because this sample is composed only one component, so a single continuous phase structure was observed.
From them, a microsphere-sized dispersed phase structure in a continuous phase of PVA matrix was observed, and this size is larger than the initial size of Ultra-fine CaCO3, this is attributed to the congregating of Ultra-fine CaCO3 in PVA solution.

Polycyclic high density fuel has a larger density and a higher volumetric calorific value, and can modulate their physical properties by changing substituent species and space structures.
It has a highly dense molecular structure, high volume energy value, good low temperature performance, is a potential candidate material of high-density fuel.
Adamantane molecule structure is special.
At the same time, because by tensioning C-H bond angle to 90 degrees or 60 degrees in the synthesis process, so that the compound has a cube or a tetrahedral structure.
[3] Zhongqiang Xiong, Zhentao Mi, Xiangwen Zhang: Development of Synthesized High-Density Hydrocarbon Fuels, Progress in Chemistry, 2005, 3, p. 359, In Chinese

When the SBS in asphalt reaches a certain amount, the three-dimensional net structure between SBS and asphalt will be formed, and the technical performances of SBS modified asphalt can be greatly improved.
The infrared spectrum in matter is the reaction of its molecular structure and it is very important to find out the feature radical of asphalt.
During the ageing process of asphalt, its own structure and property also change.
Table 4 CI indexes after different aging times Aging time/min 0 85 180 540 Host asphalt 0.0588 0.0632 0.0842 0.0889 SBS modifier 1.6857 1.8704 1.5077 SBS modified asphalt 0.0750 0.0800 0.0882 0.0909 Table 5 SI indexes after different aging times Aging time/min 0 85 180 540 Host asphalt 0.0588 0.1053 0.0947 0.0889 SBS modifier 1.1429 1.7143 1.8832 SBS modified asphalt 0.6000 0.5760 0.5074 0.4682 The macro index of asphalt is actually the outside manifestations of its micro structure changes, and the macro assessment index for asphalt ageing can show its micro structure changes.
[3] Mohammad FarhatAli MohammadNahid Siddiqui.Changes in asphalt chemistry and durability during oxidation and polymermodification[J]..

Fast Pyrolysis of Rapeseed Oil in Presence of CuO Supported SBA-15 Catalysts Valdis Kamparsa*, Sintija Zīriņab, Agija Stankec, Modris Rozed Riga Technical University, Institute of Applied Chemistry, P.
Hence, the structure of latter is more complicated and subjected to region, season and climate.
This is especially important for the development of the catalysts with defined structure, specific geometric shape and defined size of pores, which could ensure selectivity.
Amongst these materials the SBA-15 catalysts have been intensively investigated to find new relationships between its textural characteristics and structure of reactants and products [8-11].
SXRD pattern of SK-3 and WXRD pattern of SK-9 This provides evidence that an introduction of precursor and CuO nanoparticles did not damage the mesoscopic structure of silica SBA-15.

Introduction GTAW is a common method used for producing structures made of aluminium and its alloys [1].
Scheme of connection between the sectioned structure and the welding circuit (mi = 17.8 A/div; mt = 0.1 s/div) Figure 3.
Thus, the results of the experiment using the sectioned structure were consistent with the data captured by a high-speed video camera.
This conclusion is verified by the results of an additional experiment using the sectioned structure.
Martinson, On some regularities in flows of arc plasma flows, Physics and Chemistry of Materials Processing 2 (1972) 9-14

Comparing the diffractograms of Figure 4 and Figure 5 with the sample in Figure 3, the positioning of the main peaks of SiO2 cristobalite can be considered a marker indicating significant transformations in the clay structure [11].
X-ray phase analysis studies have confirmed the absence of significant structural changes in the adsorbent due to the regeneration process, indicating similarity in the structure of native and regenerated sorbents.
This is attributed to their high efficiency, cost-effectiveness, and the potential utilization of spent mixed sorbents for various purposes such as fertilizers, soil structure improvement, components of substrates for the regeneration of disturbed lands, and feed mixtures.
Chemistry & Chemical Technology. 11(1) (2017) 117–124
Koliada, Effect of Acid Modification on Porous Structure and Adsorption Properties of Different Type Ukrainian Claysfor Water Purification Technologies.

During the carbonization and activation, the heating rate is of a great importance, because too high heating rate results in distorting, even destroying the structure.
These graphite flakes formed a structure of “V” called the second open pores.
The activated carbon could keep the structure of expanded graphite, and only a little activated carbon was found in the large spaces among second open pores.
Yuan, Effect of activated carbon fiber anode structure and electrolysis conditions on electrochemical degradation of dye wastewater, J.
Cheng, et al, Preparation and structure analysis of expanded graphite-based composites made by phosphoric acid activation, J.

Mitrofanov 2,d 1 Institute of Solid State Chemistry, Ural Department of Russian Academy of Science, Pervomaiskaya St. 91, Ekaterinburg, Russia 2 Institute of Metallurgy, Ural Department of Russian Academy of Science, Amundsen St.,101, Ekaterinburg, Russia a bannikov@ihim.uran.ru, bfishman@uran.ru, cleo@presidium.ras.ru, dvyam@mail.ru Keywords: Oxide, diffusion, vacancy, Jahn-Teller, pair interionic potential, double exchange.
We shall consider, that the area I can be chosen enough large, such those atoms in the area II occupy the positions corresponding to the structure of an ideal crystal.
For oxides family with 3d-ions we can adopt the simplest form of dependence of transfer integral t versus the structure parameters, the Cu-O spacing r and Cu-O-Cu bonding angle θ [2], )cos( θbaArt m += −
The character of the corresponding contribution depends on the electron configuration of 3d-ions, geometry of anion migration and, as a result, on structure parameters r and θ.
In this way the considered vacancy model of oxygen ion diffusion in oxides with NaCl structure containing MV complexes of 3d-ions can adequately describe the oxygen diffusion in these compounds.

The nanoparticles obtained was approximately 600-800 nm and exhibit a high crystalline structure with hexagonal morphology.
In another work, Habte et al. have converted the solid structure of eggshells into nanosized calcium oxide (CaO) powder of 198 nm with spherical morphology using sol-gel method [18].
The influence of HCl concentration on the crystalline structure, morphology and size of the particles is reported.
On the other hand, the crystal structure of the synthesized calcium hydroxide was primarily composed of portlandite.
Baglioni, Nanoparticles for cultural heritage conservation: calcium and barium hydroxide nanoparticles for wall painting consolidation, Chemistry–A European Journal, 16(31) (2010) pp.9374-9382

At present, the widely accepted model of sputtering thin films is the SZ model (The structure Zone Model) proposed by J.A.Therton.
Structure zone model.
Under normal temperature and pressure for six quartzite structure stability ZnO, the electronic film has low growth temperature and high mobility.
Crystal structure.
Physical Chemistry Chemical Physics 3 2503-2513 [2] Bi D, Boschloo G and Schwarzmüller S 2013 Efficient and stable CH 3 NH 3 PbI 3-sensitized ZnO nanorod array solid-state solar cells J.