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Density Functional Theory is a quantum mechanics method that studies electronic structure in many-electron system.
Xiaolei Zhang[9] has used quantum chemistry density functional theory to study the reaction between CO and oxygen carrier Fe2O3.
Table 1 listed the crystal cell parameters for optimized structure shown in fig 1.
The structure of reactants, transition state, products and reaction path chart were shown as in Fig 8.
Crystal Structures[M].

However, the problem of erosion destroyed the structure of concrete and reduced the quality of the works.
Besides if the rate of Si/Al is over than 3, the links of geopolymeric structures will be named poly sialate-multisiloxo [1, 2, 7-10, 16].
The geopolymeric structures are strong and durable bonds to create strength for concrete based geopolymer.
The sodium alumino-silicate networks are commonly characteristic of the structure found in geopolymer-based materials.
Davidovits, Geopolymer chemistry and application, 3rd editon, Institute Geopolymer, France, 2011

X-ray diffraction patterns shows that the deposited films are found to be hexagonal structure with preferential orientation along (100) plane.
Cd-Fe-Se semiconducting thin films are usually crystallized in the hexagonal (FeSe) and hexagonal (CdSe) structures.
The electrodeposition of II-VI ternary compounds is more complex because they involve several deposition parameters which control the film properties such as film composition and structure.
The surface is observed to be uniform with compact structure.
R.S.Mane and C.D.Lokhande: Materials Chemistry and Physics Vol. 65 (2000) p.1. [4].

This type of processing permitted to obtain a more uniform structure for the composites with ultrafine layers of the binding compounds separating dispersed cBN grains.
o) Characterizing of the cBN structure by scanning electron microscopy (SEM).
This cycling procedure for applying pressure and temperature was based on the supposition that it could form a martensitic structure in the binder and so resulting in a closer position of the cBN particles, one with respect to the other.
The structure of the compact composites was analyzed by SEM in diametrically ruptured samples.
Wentorf: Journal of Chemistry Physics, Vol. 26 (1957), p. 956. 8.

Welding of IN792 DS Superalloy by High Energy Density Techniques Giuliano Angella1,a, Giuseppe Barbieri2,b*, Riccardo Donnini1,c, Roberto Montanari3,d and Alessandra Varone3,e 1 Institute of Condensed Matter Chemistry and Energy Technologies (ICMATE), National Research Council of Italy (CNR), 20125 Milan, Italy 2 ENEA, Department for Sustainability of Production and Territorial Systems - Research Centre of Casaccia, 00123, Santa Maria di Galeria - Rome, Italy 3 Department of Industrial Engineering, University of Rome “Tor Vergata”, 00133 Rome, Italy agiuliano.angella@cnr.it, b giuseppe.barbieri@enea.it, criccardo.donnini@cnr.it, droberto.montanari@uniroma2.it, e alessandra.varone@uniroma2.it Keywords: superalloys, welding, laser, electron beam, microstructure Abstract.
The material exhibits a good microstructural stability up to 900°C even if some limited re-arrangement of dislocation structures may take place [25].
a b c d Fig. 1 - Sample welded without PHT: cracks and pores are observed in the seam (a); fracture surfaces clearly show the dendritic structure (b-c).
Sammy in “Nickel-Based Superalloys for Advanced Turbine Engines: Chemistry, Microstructure, and Properties”, University of Michigan, Ann Arbor, Michigan 48109, University of Cambridge, Cambridge, England CB2 3QZ, United Kingdom, 2006

Among state-of-the-art techniques available at present, 3DAP looks most promising and suitable for the study of grain boundary chemistry [9].
It allows the quantitative measurement of the chemistry and position of solute at near atomic-level, even for light elements such as C and N.
Therefore, in order to avoid the possible influence of Ga ions on grain boundary segregation and the structure, it is important to remove a top surface layer of at least 50 nm depth by field evaporation before the analysis.
When the crystal structure of the materials is known, Miller indices can be assigned to the planes in FIM images, leading to a determination of the crystallographic orientation of the grain.

Qinghai Environmental Monitoring Centre, Xining,810007, China 1 email: linashi@nwipb.cas.cn, 2 email: xxmisssj@163.com,3 email: d.xy@163.com, 4 email: xu_dong_zhao@163.com *Lina Shi, female, doctor, is committed to the field of environmental chemistry research.
Local governments focus on the transformation of economic development mode, timely adjust indus trial structure and energy structure, and strengthen the governance of the source of emissions.
Analytical Chemistry,1979, 51:844-851

Tab.2 Sensory indexes of the skin care lotion index names index requirements test results colour and lustre conforming to stipulation creamy-white, conforming to stipulation structure exquisite exquisite and homogeneous aroma conforming to stipulation -- 2.2 Physical-chemical indexes of the skin care lotion The pH value of human skin is usually 4.50~4.60[12], and the pH of skincare products should be partial acidic to increase the effect of skincare products absorbed by skin.
The particles of skin care lotion are in uniform size and regular shape, which should make the emulsion possess exquisite structure, good stability and nice skin feeling and which is consistent with the results of sensory indexes and physical-chemical indexes test. 2.4 Skin irritation of the skin care lotion Safety is the most key element and foundation of cosmetics, so to confirm whether the prepared product may cause skin irritation is very important.
[3] Jianyin Miao, Ke Che, Xuexiang Chen, et al: Chemistry and Industry of Forest Products, Vol.32 (2012), p.67-71
[6] Liyi Ma, Youqiong Wang, Zhongquan Zhang, et al: Chemistry and Industry of Forest Products, Vol.29 (2009), p.6-10

Metallographic sampling location Fig.2 Tensile samples Tab.1 Chemistry composition of alloy (mass fraction: %) Alloy chemistry composition(mass fraction%) Zn Zr Y Mn Fe Si Ni Cu Mg ZYK530 4.8918 0.5187 2.8956 0.0063 0.0018 0.0029 0.0009 0.0026 Bal. 2.
It can be seen that there is an incomplete dynamic recrystallization structure which distributes along the extrusion direction.
Long-period ordered structure in a high-strength nanocrystalline Mg-1at%Zn-2at%Y alloy studied by atomic-resolution Z-contrast STEM[J].

PVA/Chitosan Composite Electrospun Nanofiber Membranes for Wound Dressing and Antibacterial Efficacy Ni Nyoman Rupiasih1,2,a*, Ria Yuliani1,b, Dewa Ayu Sukma Pranastia1,c, Made Sumadiyasa2,d, Wayan Supardi1,e, I Made Sukadana3,f and Maykel Manawan4,g 1Department of Physics, Faculty of Mathematics and Natural Sciences, Udayana University, Bali, Indonesia 2Group Research Material Sciences and Technology-Polymer and Biomaterial, Faculty of Mathematics and Natural Sciences, Udayana University, Bali, Indonesia 3Department of Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University, Bali, Indonesia 4Faculty of Defense Technology, Indonesia Defense University, Bogor 16810, Indonesia *arupiasih@unud.ac.id, briayuliani02@gmail.com, cPranastiasukma@gmail.com, dsumadiyasa@unud.ac.id, esupardi@unud.ac.id, fim_sukadana@unud.ac.id, gmaykeltem@gmail.com Keywords: PVA/Chitosan; electrospinning; nanofiber membranes; wound dressing; antibacterial.
The fundamental characteristics of the wound dressing consist of oxygen permeability (gas transfer), non-adhesion to healing tissue, absorbency, bacterial barrier, and bioactivity, all fulfilled by the electrospun nanofiber structure [6].
[12] Ni Nyoman Rupiasih, Made Sumadiyasa, I Ketut Putra, Ida Ayu Putu Inten Gayatri, Effect of Weak Magnetic Field on the Structure and Physical Properties of Chitosan Membranes, Materials Science Forum. 1044 (2021) 181-189
Meyers (Eds.), Encyclopedia of Analytical Chemistry, John Wiley & Sons Ltd., Chichester, 2000, pp. 10881-10882