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In protein secondary structure researches use amide I band (1700 ~ 1600 cm-1) peaks to identify.
This is due to the changes of protein secondary structure in emulsion during freezing process, and part of the hydrogen bond is opened, and the transformation of α-Helix to random coil structure.
And the distribution of fat ball size is analyzed in the microcosmic The honeycomb structure of emulsion is observed by scanning electron microscopy cooling stage.
The FTIR analysis on the mechanism of demulsification shows the main reason of demulsification is due to the changes of protein secondary structure in emulsion during freezing process, and part of the hydrogen bond is opened and the transformation of α-Helix to random coil structure.
Food Chemistry. 93 (1), 253-263

The PdX2 phases (X=Se, S) [2, 3] exhibit a special layered structure.
Alternatively, the structure can be described as a layer structure, the layers consisting of Pd atoms forming four planar bonds to Se2 (S2) groups - the so-called PdS2 structure.
PdSe2 is still in PdS2 structure but pressure increasing makes it less and less stable.
What is very important: this effect is much stronger concerning pyrite structure type.
David: J. of Solid State Chemistry Vol. 89 (1990), p. 315 [3] S.

The two unit structures (C4O42– and C4H4O4) of the n = 1 molecule are shown in Fig. 2(a), and the dimeric structure of the n = 2 cluster ([C4H3O4–H–C4H3O4]3+) and the tetrameric structure of the n = 4 cluster ([(C4H3O4)4H4]4+) are shown in Fig. 2(b).
Unit structures are two types of C4O42– and C4H4O4.
The Fig. 3 The optimized geometries of unit structures.
We reproduced not only the difference between the two hydrogen bond structures along the a and c axes but also the unit structure of C4O42–.
By applying an adequate cluster model, such as the tetramer, we found that both local structures (for example, hydrogen bond structures) and entire systems (including unit structures) were reproducible.

However, the intrinsic disordered microporous texture, the difficulty in precise pore size control during activation process and the surface chemistry have imposed some limitations on their energy storage and high power application [5-8].
This indicates two kinds of carbon structure are presented in CB900.
Different microporous structures were observed for the two templated carbons as seen from Fig. 4a and b.
A homogeneous carbon framework was observed on sample CN900 (Fig. 4b) while a core-shell structure was seen on sample CB900.
As expected, the micropores in such a hierarchical porous structure are very efficient in EDL charging [9].

Bhattacharya, “Evaluation of compatibility and properties of biodegradable polyester blends,” Journal of Polymer Science Part A: Polymer Chemistry, vol. 40, no. 12, pp. 2003-2014, 2002
Müller, “Crystallization, morphology, and enzymatic degradation of polyhydroxybutyrate/polycaprolactone (PHB/PCL) blends,” Macromolecular Chemistry and Physics, vol. 208, no. 9, pp. 924-937, 2007
Eguiazábal, “Melt processed PLA/PCL blends: Effect of processing method on phase structure, morphology, and mechanical properties,” Journal of Applied Polymer Science, vol. 132, no. 41, 2015
Zhao, “Effects of cellulose nanocrystals and cellulose nanofibers on the structure and properties of polyhydroxybutyrate nanocomposites,” Polymers, vol. 11, no. 12, pp. 2063, 2019
Wang, “Biodegradation behavior of PHAs with different chemical structures under controlled composting conditions,” Polymer Testing, vol. 30, no. 4, pp. 372-380, 2011

Attempts to address the bandgap issue are usually done by modifying the structure of TiO2 using dopants.
The Ag-TiNTs were characterized for its surface morphology, surface chemistry, crystallographic properties, and elemental distribution.
Similarly, pristine TiNTs also showed a nanoporous structure with an average inner diameter of 52.30 ± 0.58 nm.
The most prominent peak of TiO2 for both pristine TiNTs and Ag-TiNTs is associated with the (101) plane of the tetragonal structure of anatase.
Again, Ag-doping introduces defects within the crystal structure of anatase; this explains the observed decrease in the degree of crystallinity.

According to [29], the research by the scientists and specialists in the near and far abroad is mainly aimed at creating new electrode materials for ESA, studying the structure and properties of the coatings [30-36], but there is a limited amount of information on the technologies directed to the solution of the problem of restoring the working surfaces of the parts which work under conditions of sliding friction with the wear of 0.2 mm and more.
Berezkin, Gas Chromatographic Analysis of Polluted Air, Chemistry, Moscow 1981
Zatulovsky et al., Structuring and Mass Transferring of Wear-Resistant Coatings During Electrospark Alloying of Al-Si Alloys with LaB6-ZrB2 Composite Ceramics, J.
Ri, The Formation of the Layer Structure on Metals and Alloys During Electrospark Processing, DVGUPS Publishing House, Khabarovsk, 2010
Handbook, Chemistry, Moscow 1988

Hence, the mechanism and kinetics of CaCO3 precipitation have been investigated by scientists in a variety of disciplines, including biology, geology, and chemistry [16].
Calcite is the most abundant and established, usually appearing in a white or colorless, crystalline form, with a hexagonal crystal structure.
Vaterite is the least stable type, which often has a grey or white color and a cubic crystal structure.
It is a white, brown or yellow mineral with a greater straightened crystal structure.
ACS Sustainable Chemistry & Engineering 5 (8):7449

A number of factors must be considered for the HA bioactive coat to achieve its proposed function as; implant surface properties, the coat film thickness, and the coat film criteria (its chemistry and crystal structure, in addition to its porosity and surface topography) [37-40].
Following that, the HA particles were mechanically grinded to the nano-scale size, specifically (100 nm) to allow their integration into the nano-pores of the etched zirconia surfaces through immersion procedure, hence zirconia surface engineering was completed by allowing it to act as a carrier for the bioactive HA nano-particles within its 3D nano-porous structure.
It is could be attributed to the bioactive HA potential to promote attachment and proliferation of matrix producing bone cells on its carbonated apatite surface, which has the same surface chemistry as bone [13,14,59].
A review of bioactive glasses: their structure, properties, fabrication, and apatite formation.

Meanwhile, numerous researches have demonstrated that the application of mechanical stress can affects the permeability of cement-base materials significantly and there is a threshold value for the effect of a simultaneous compressive stress on permeability according to the research results in the concrete structure under load [27, 42, 43].
Cement Chemistry.
Review: Role of chemistry, mechanics, and transport on well integrity in CO2 storage environments.
Experiment and research of prestressed concrete structure in carbonation environment.
Materials and Structures, 50(2017), 123