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The chemistry, microstructure, hardness, tensile and impact toughness properties of the selected AISI 4335 grade steels from different batches of commercial productions were assessed by standard methods.
The fractured surfaces of a large number of broken samples were examined by SEM which exhibited primarily quasi-cleavage features mixed with microvoids and intergranular facets; these features are typical signatures as observed on fractured specimens of tempered martensitic structures.

The early-strength polyurethane concrete technology is the new outcomes of materials used in the structure engineering these years, which mixed polyurethane resin of fast concretion properties with certain combination materials to form stable organization, and it can be applied in the fast filling and surface repairing of the roads and concrete structure.
[5] Klein Symposium on Expansive Cement Concrete, ACI, SP-38(1973) [6] Cedric Wilson Symposium on Expansive Concrete, ACI, SP-64(1980) [7] 7th.International Congress on the Chemistry of Cement, Bulletin Vol.Ⅲ (1980) [8] A.M.
Symposium on Structure of Portland cement Portland Concrete.

Chou, Designing vortex finder structure for improving the particle separation efficiency of a hydrocyclone.
Industrial and Engineering Chemistry Research, 51(1) (2012) 443–453.
Final Project: School of Chemistry / Federal University of Rio de Janeiro, Rio de Janeiro, Brazil (2008) (In Portuguese) [35] L.C.
Final Project: School of Chemistry / Federal University of Rio de Janeiro, Rio de Janeiro, Brazil (2009).

FTIR, 1 H and 13 C NMR determined the structure of the synthesised PLA, while GPC was used to determine the molecular weight.
Each particle is seen as a hexagonal structure joining each other to skeletal framework structure.
Variations in the structures of the detected compounds are proposed to contribute to the overall microstructural differences in Figure 9a-b.
Ikese, Phytochemical screening, thin-layer chromatography and antimicrobial activity study of leaf extracts, Ovidius University Annals of Chemistry, 30 (2019) 88-94
Abhishek, High Molecular Weight Poly(Lactic Acid) Synthesized With Apposite Catalytic Combination and Longer Time, Oriental Journal of Chemistry, 34 (2018) 1984-1990

With the accumulation of strain, deformation mainly occurs in martensitic structure, which reduces the plasticity.
Except the content of Cu, there exist few differences among the rest alloying compositions, and the chemistry compositions of the two austenitic stainless steels used in this work are given in Table 1.
From what is stated above, the structure is austenite + dislocation martensite, which is in accordance with the XRD results.
(5) The martensite structure derived from strain-induced martensitic transformations is lath martensite which mainly consists of dislocated martensite.
The effect of cold work on structure and properties of AISI 304 stainless steel[J].

The structure and properties of MPP and dc CrN coatings were characterized using x-ray diffraction, scanning electron microscopy, nanoindentation tests, and ball-on-disc wear test.
However, the chemistry at the substrate is usually dominated by the ions of the inert sputtering gas while ions of the sputtered material are rare.
The structure of the coatings were studied by grazing incident angle X-ray diffraction (GIXRD) using 2o incident angle scaned from 30 to 70 o .
It can be seen that both dc and MPP sputtered CrN coatings exhibit a NaCl-type structure, where the diffraction peaks (111), (200) and (220) can be observed.
However, a very dense and large columnar free structure was revealed in the MPP sputtered CrN coating deposited using floating substrate bias.

Humidity Sensing Property of Al-doped Mesoporous Silica Geng Wangchang 1,a , Duan Libing1,b, Zhang Qiuyu1,c 1 School of Science, Key Laboratory of Space Applied Physics and Chemistry of Ministry of Education, Northwestern Polytechnical University, Xi’an 710072, P.R.
Its structure and morphology was characterized by X-ray diffraction (XRD), Infrared (IR), scanning electron microscope (SEM).
In the present work, the advantages of both mesoporous structure and additives are combined to synthesize Al-doped mesoporous silica SBA-15.
Results and discussion Structure and morphology.
As can be seen, three diffraction peaks resulting from the ordered mesoporous structure of Al-SBA-15 were clearly observed.

Recently different doped elements that play unique roles to show the different crystal structure of MnO2 and improve the electrical conductivity of it such as Ag1+, Ni2+, Cu2+, Mg2+, Sn2+, Co3+, B3+, Al3+ have been reported[12-17].
The morphologies of various samples were portrayed by scanning electron microscopy and crystal structure of which was characterized under powder X-ray diffraction with Cu-Kα radiation (λ = 0.15418 nm) at a scan rate of 10°/min from 10° to 80°.
Synthesis, structure, magnetic, electrical and electrochemical properties of Al, Cu and Mg doped MnO2 [J].
The Journal of Physical Chemistry C. 119 (2015) 8465-71
Modulating the electronic structure and pseudocapacitance of δ-MnO2 through transitional metal M (M = Fe, Co and Ni) doping [J].

The structures of Schiff bases polymers were determined by FT-IR and 1H NMR.
In general, 3-alkylation, alkoxy polythiophenes were ordinary reported as organic photovoltaic materials [2-5]because of its unique optical, electrical, magnetic [6], good coordination chemistry performance, anticancer antibacterial [7] and weeding [8].
The polymer solar cell device (PSC) was fabricated as the traditional sandwich structure with an indium tin oxide (ITO) glass as positive electrode and aluminum film as negative electrode.
The structure of PSC device is ITO/PEDOT:PSS/Polymers/Al and its effective activation area is about 1.0 cm2.
The main reason is that the the side chain of Schiff base structure can be conjugated with main chain.

Keiding, Pyrene sorption to water-dispersible colloids: effect of solution chemistry and organic matter, Vadose Zone J. 3 (2004) 451–461
Walker, Mechanisms of TiO2 nanoparticle transport in porous media: role of solution chemistry, nanoparticle concentration, and flowrate, J.
O’Melia, Effects of natural organic matter and solution chemistry on the deposition and reentrainment of colloids in porous media, Environ.
Elimelech, Influence of natural organic matter and ionic composition on the kinetics and structure of hematite colloid aggregation: implications to iron depletion in estuaries, Langmuir 20 (2004) 9000-9006