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By varying the precursor gas mixture, iron/carbon nanocomposites (core-shell structures) and gamma iron oxide nanopowders were obtained and characterized.
The properties and structures are controlled by the main process parameters (precursor gas (vapour), gas flow rate, pressure, laser power.
The structure of particles was observed by HREM analysis.
Takami, Journal of Photochemistry and Photobiology A: Chemistry Vol. 71 (1993), p.213 [35] X.
Zaikobsky: Chemistry for Sustainable Development Vol. 8 (2000), p. 43

This paper systematically introduces the structure, preparation methods, and hydrogen storage capability of boron nitride nano-tubes.
Based on adsorption theory, hydrogen storage materials is divided into two sections chemistry adsorption and physical adsorpti：Chemisorption of hydrogen storage materials include light metal alloys [3-5] and lanthanide hydrogen storage alloys [6-8].
The structure of boron nitride The structure of boron nitride(BN) is similar to the graphite(C), especially the hexagonal boron nitride (h-BN), its structure almost same to the layered structure of graphite.
The comparison of crystal structure between hexagonal boron nitride and graphite is shown in Figure 1.
The hydrogen storage property of boron nano-tubes The structure of boron nitride nano-tubes is very similar to that of carbon nano-tubes.

Reaction mechanism of dye with atomic hydrogen on Au cathode plated nanostructured Pd film Lihui Huang1, a, Guopeng Sun1, b, Houyi Ma2, Tao Yang1, c 1 School of Environmental Science and Engineering, Shandong University, Jinan 250100, China 2 School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China a huanglihui9986@126.com, b sunny2006hlj@163.com, c yangtao191308@126.com Keywords: triazine structure; atomic hydrogen; Pd/Au electrode; electrochemical reduction; dye protonation.
The structure of C.I. reactive blue 19 (RB 19) and reactive brilliant blue K-GR (RBB K-GR, No Colour Index) is showed in Fig.1: Fig. 1 Chemical structure of C.I. reactive blue 19 (a) and reactive brilliant blue K-GR (b) The structures of two dyes are similar, which have a similar chromophore group.But RB19 takes vinyl sulfone as reactive group, while monochlorotriazine is the reactive group of RBB K-GR.
The semi-circle of RBB K-GR is smaller than that of RB 19 because besides the anthraquinone, the triazine structure in RBB K-GR molecule could also be protoned [11].

Their structures and thermal properties have been analyzed by infrared spectra, SEM, DSC and TGA.
The pentanediamine adipate and bio-based pentanediamine adipate maybe contain two different crystal structures, or there are imperfect (low melting point) and perfect crystal structure (high melting point), with two melting temperature at 127.2 and 182.3 °C, respectively.
Pentanediamine adipate maybe contains two different crystal structures, or imperfect (low melting point) and perfect crystal structure (high melting point).
Filament properties of biological based poly (adipic acid-1, 5-diaminopentane) and structure of polymer.
Study on the structure and properties of novel bio-based polyamide56 fiber compared with normal polyamide fibers.

Here, we employed PMHS as structure-directing agent in the preparation of carbonaceous silica xerogels.
From the images, the particles have irregularly porous structures with the pore diameters from 10 to 50 nm.
The results indicate that the xerogel X0.5 has mesoporous structures.
The porous structures in the SiC samples are related to the special structure of PMHS.
The special structure of PMHS can lead to the formation of porous structures in the xerogel, which could be kept during the carbothermal reduction process.

Preparation and Characterization of Novel Hollow Fiber Membrane with Multicomponent Polymeric Materials YunQing Li1, a, DanLi Xi2, b and ShunLi Fan3, a * 1, 3 College of Chemistry and Environmental Science , Henan Normal University, Xinxiang ,453007, P.
The cross-sectional structures were examined by scanning electron microscopy.
Membrane with these structures often has higher pure water flux and lower retention to BSA.
Membrane precipitated in 1~2 minutes is inclined to form sponge-like structure, while one precipitated less than 10 seconds often has a finger-like structure.
Addition of solvent or decreasing the coagulant temperature would lead to the membrane pores to change form finger-like structure to sponge-like structure [9].

FT-IR spectroscopy measurements were performed to investigate the change of chemical structure.
FT-IR analysis showed that plasma had little effect on the chemical structure of PMIA fibers.
This fiber, which is characterized by its excellent thermostability, flame retardance, electric insulativity, and radiation resistance, is extensively used in the industries of aerospace, national defense, electronics, communication, chemistry, environmental protection, and ocean development.
Therefore, it can be seen that sub-atmospheric pressure dielectric barrier glow discharge plasma had little effect on the chemical structure of PMIA fibers.
FT-IR analysis showed that plasma had little effect on the chemical structure of PMIA fibers.

Lightweight construction materials are used to reduce either the weight or the budget of building structures.
Aluminium (Al) powder was utilized to create bubbles in porous structure and giving information for porous geopolymer production.
Geopolymer is synthesized by polycondensation of aluminosilicate structures which consist of SiO4 and AlO4, tetrahedral frameworks, linked by shared oxygen in sialates network [3,4].
Leonelli, Inorganic polymers from alkali activation of metakaolin: Effect of setting and curing on structure, Journal of Solid State Chemistry. 200 (2013) 341-348
Ramamurthy, Structure and properties of aerated concrete: a review, Cem.

In this investigation, the experimental data were used for building ANFIS structure or architecture for data training and followed by data testing for validation of the structure.
Therefore, gauss input and linear output mfs are the best parameters for developing ANFIS structure for the prediction.
Asiri, Recent developments of gallic acid derivatives and their hybrids in medicinal chemistry: A review. 
European journal of medicinal chemistry 204 (2020) 112609
Zhu, Chemical composition and health effects of maca (Lepidium meyenii), Food chemistry 288 (2019) 422-443

Introduction Grain structure refinement by means of severe plastic deformation (SPD) is a very perspective approach to the improvement of functional properties of metals.
At all stages of the procedure, the structure of the material was controlled by raster and transmission electron microscopy.
The post-deformation annealing leads to some decrease of both the grain-boundary and dislocation strengthening due to some recovery of the structure.
Ivanov, Structure and resistance to deformation of FCC ultrafine-grained metals and alloys, Physical Mesomechanics. 7 (2004) 93–113
Nikolsky, Chemist Directory, volume one, Moscow, Chemistry, 1966