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The micropore, hydrophobic property, mechanical strength and material chemistry of the PVDF membranes soaked in seawater or concentrated seawater were characterized by SEM-EDX, IR, contact angle testing instrument and electronic fabric strength tester, which were compared with those of origin membranes.
Provided the pore size is suitable for the free bromine molecule by selecting the suitable membrane material and varying its structure parameters, it is possible for bromine to diffuse through the membrane with a good separation performance.
The hydrophobic property, micropore, mechanical strength, and material chemistry were characterized by contact angle testing instrument, SEM-EDX, IR, electronic fabric strength tester and permeate test, which supply the bases of choice of membrane type for extracting bromine. 2.
The different membrane performance between the two may come from the different fabrication process. 3.4 Material chemistry 3.4.1 EDX analysis. 3.4.1.1 PVDF1 From the EDX results of PVDF1 soaked for 6 years, it can be seen that the PVDF1material wasn’t polluted by bromine in the seawater only with a little of K+ appearing, by contrast, the PVDF1 material was slightly oxidized by bromine in concentrated seawater with little pollution of other salts. 3.4.1.2 PVDF2 From the EDX results of PVDF2 soaked in seawater and concentrated seawater for 6 years, it can be seen that there is no Br atoms appearing in the origin membrane, but Br atoms with a percentage composition of 0.34% and 0.69% (wt %) were found when the PVDF2 were soaked in seawater and concentrated seawater, respectively.
The properties, such as micropore, hydrophobic property, materials chemistry and membrane life changed little during a long time.

Synthesis and Surface Engineering of La1-xSrxMO3 Nanoparticles for Biomedical Applications Wenzheng Cheng1, a, Wu Zhang1, b, Hongling Liu1, c*, Xuemei Li1, d, Xiao Liu1, e 1 Institute of Molecular and Crystal Engineering, School of Chemistry and Chemical Engineering, Henan University, Kaifeng 475001, China aWenzheng529@126.com, bzhw@henu.edu.cn, chlliu@henu.edu.cn, dlixuemei6056@163.com, eliuxiao0337@163.com Keywords: La1-xSrxMO3 nanoparticles; surface modification; magnetic hyperthermia treatment Abstract: La1-xSrxMO3 nanoparticles have attracted increasing interest to material sciences due to their tunable Curie temperature (Tc), superparamagnetic nature and electrical properties, which could be utilized in magnetic hyperthermia treatment.
The XRD pattern indicated that the sample crystallized in a typical ABO3 perovskite rhombohedral structure with R-3c symmetry (as Fig. 1).
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China 2School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, P.
In the molecular structure, the V(IV) ion is six coordinated to form a distorted octahedral geometry.
Schiff base complexes play an important role in stereochemical models of transition metal coordination chemistry, with their easy preparation, diversity and structural variation [2].
The structure was solved by direct methods using SHELXLS-97 and refined against F2 by full matrix least squares using SHELXL-97 [13,14].
Description for the Crystal Structure The molecular structure of [VO(o-van-phe)(phen)] with the atom-numbering scheme is depicted in Fig. 1.

The characteristic peak for the stretching vibration of the sulphide group in the Ag2S structure appeared at 1738 cm-1.
Liz-Marzán, Oleylamine in Nanoparticle Synthesis, Chemistry of Materials, 25 (2013)
Omondi, Synthesis and crystal structures of bis(dibenzyl dithiocarbamato)Cu(II) and Ag(I) complexes: Precursors for Cu1.8S and Ag2S nano-photocatalysts, Journal of Molecular Structure, 1221 (2020) 128791
Prasad, Synthesis, structure and thermogravimetric analysis of novel dithiocarbamate based Zn(II),Cd(II) and Hg(II) complexes, Journal of Molecular Structure, 1198 (2019) 126912
Wells, Structural inorganic chemistry, Oxford university press2012

The spectra of the samples indicated as fluorite structure in X-ray diffraction patterns appear with six resolvable peaks which is quite different from the spectrum of ideal fluorite structure.
From the view point of crystallography, pyrochlore structure (Fd-3m) can be considered as an ordered defective fluorite structure (Fm-3m) [1,2,3].
Thermal expansion and defect chemistry of MgO-doped Sm2Zr2O7.
Structure and crystal chemistry as a function of composition across the wide range nonstoichiometric (1-ε) ZrO2·εSmO1.5, 0.38 <ε< 0.55, oxide pyrochlore system, J Solid State Chem. 148 (1999) 205-214
Defect chemistry and thermophysical properties of rare-earth oxide ceramics for thermal barrier coating applications.

Stilbenes, quinoid structures and various carbonyl compounds, e.g.
Rowell (Ed.), The chemistry of solid wood, Advances in Chemistry Series No. 207, American Chemical Society, Washington, 1984, pp. 577-588
Sjöström, Wood chemistry: fundamentals and applications, second ed., Academic Press, New York, 1981
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Rowell (Ed.), The Chemistry of solid wood, ACS Advances in Chemistry Series No. 207, American Chemical Society, Washington D.C., 1984, pp. 57-126.

A novel platinum complex as telomeric G-quadruplex binders Xujian Luo1, 3 a*, Qipin Qin2, b, Yulan Li 2, c, Yancheng Liu 2, d 1 College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, 410083, P.R.
China. 2 State Key Laboratory Cultivation Base for the Chemistry and Molecular Engineering of Medicinal Resources; School of Chemistry & Chemical Engineering of Guangxi Normal University, Guilin 541004, P.
China. 3 School of Chemistry and Material, Yulin Normal University, Yulin 537000, P.
Many cellular events, such as transcription, recombination, and telomeric DNA elongation, may open the double stranded DNA structure, and the special G-rich sequences of chromosomes and promoter regions can form G-quadruplex structures [2].
As seen in Fig. 6a, there are a negative band at 235 nm and two positive bands at 250 and 290 nm in the absence of K+, which is indicative of a mixture of linear structure and other structure for single-stranded telomeric Htel-21 [9].

Thus, in this paper, density functional methods of quantum chemistry is adopted to study molecular structure of carboxymethyl chitosan.
The chemical structures of chitosan, O-CMCS and N-CMCS are shown in Fig. 1.
Fig. 7 shows the optimized structure of chitobiose.
This study has received more support from the key discipline of physical chemistry in metallurgy.
Vol. 236 (2005), p. 617 [5] Ai-qin Wang: Chitin Chemistry (Science Press, China 2008)

The results that the removal rates of different dyes were different were explained based on the dye’s chemistry structure.
The reasons of the removal rate of different dyes were given based on the dye’s chemistry structure.
Fig.3 The Result on the Removal of Alizarin Red by ECOP Fig.4 The Result on the Removal of Methylene Blue Thrihydrate by ECOP Analyzing the chemical structure of dyes, the molecular structure of acid orange II (as show in Table 2) is relatively simple.
The molecular structure of alizarin red (as show in Table 2) belongs to the typical anthraquinone dye with two hydroxyl anthraquinone aromatic conjugated structure of the chromophore and sulfonic acid group auxochrome.
While methylene blue thrihydrate belonging to sulphur dye has the complex structure of the chromophore containing sulfur, auxochrome containing amidocyanogen and methyl (as show in Table 2).

Satyanarayana: Materials chemistry and Physics, Vol. 92 (2005) No.1, p.229
Zhao: Journal of Solid Chemistry, Vol. 184 (2011) No.9, p.2339
Suzer: Journal of Materials Chemistry, Vol. 21 (2011) No.35, p.13150
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Xie: Advances in Material Chemistry, Vol. 4 (2016) No.2, p.2339