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A self-made equipment with a bi-iron cylinder inside which provides cathodic protection was used to research on hollow cathodic auxiliary plasma nitriding in this paper, What is more, the power system of the equipment supplies in the range 100 to 800 V, 0 to15A, and 0 to 15 kW. 38CrMoAl alloy steel was chose to conduct a range of orthogonal experimentation, and the chemistry compositions, microstructure and heat treatment technology [6,7] of which were shown in Tab. 1.
Tab. 1 Chemistry compositions and organization state of 38CrMoAl steel Chemistry compositions (mass percentage) Microstructure Heat treatment C Cr Mo Al Si Mn P S 0.35 - 0.42 1.35 - 1.6 0.15 - 0.25 0.70 - 1.10 0.2 - 0.4 0.30 - 0.60 ≤ 0.03 ≤ 0.03 Tempered sorbite Oil quenched after holding 930˚C for 2h then tempered 640˚C for 2h Design of Orthogonal Experiments.
Fig. 1 Comprehensive score affected by various factors The micro-structure of surface and cross section of the nitriding samples under the optimum process conditions are given by Fig. 2, a and b are the surface topography of anode and cathode nitriding samples, respectively, c and d are the corresponding cross section topography of those.
(a) (b) (c) (d) Fig. 2 Micro-structure of surface and cross section Fig. 3 shows the test pattern of micro hardness, A and B are the cross section test pattern of anode and cathode nitriding samples, respectively, C is the hardness gradient of nitriding samples.

Study of an Inorganic Ion Exchanger LiMn1.25O3 Jinhe Jiang MicroScale Science Institute , Department of Chemistry and Chemical Engineering ,Weifang University, Weifang, 261061,China Corresponding author.
In this paper, inorganic ion exchanger (LiMn1.25O3) with a spinel structure ion memory was synthesized by solid state reaction crystallization method, which is different the reported in the literatures[3-4], and its ion-exchange properties were studied.
The structure of compound metal oxide LiMn1.25O3 crystallized at 700˚C was much perfect.
Chemistry Online. 1997,(12),11-16 [3] Y.F.Liu, Kenta Ooi: Inoranic ion exchanger with ion-memery ability[J].
Chinese Journal of Applied Chemistry. 2000,17(3),307-312

Effect of Surfactant on Characteristics of Solid Lipid Nanoparticles (SLN) KULLAVADEE Karn-orachai1,a, URACHA Ruktanonchai2,b and Siwaporn Meejoo Smith3,c 1 Materials Science and Engineering Program, Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand 2 National Nanotechnology Center, National Science and Technology Development Agency, 111 Thailand Science Park, Paholyothin Road, Klong1, Pathumthani 12120, Thailand 3 Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama VI Road., Rajathevi, Bangkok 10400, Thailand ak_puyfai@hotmail.com, buracha@nanotec.or.th, csiwaporn.meejoo@gmail.com Keywords: Solid lipid nanoparticles, Raman Spectroscopy, Raman mapping and drug distribution, surfactant Abstract.
The structure of SLN was investigated by microscopic techniques such as Scanning Electron Microscopy, Transmission Electron Microscopy [1], and Atomic Force Microscopy [2].
This may suggest that Tween 80 consist of polyoxyethylene group which has a more steric structure than pyridinium group of CPC.
We acknowledge Department of Chemistry, Faculty of Science, Mahidol University and National Nanotechnology Center for providing equipments.

Preparation and Characterization of Polysulfone/Activated Carbon Composite Bead Form Maimoon Sattar1, a *, Fareeda Hayeeye1, b, Watchanida Chinpa2, c and Orawan Sirichote1, d 1Department of Chemistry, Faculty of Science, Prince of Songkla University, Songkhla 90112, Thailand 2Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Songkhla 90112, Thailand a *maimoon_sattar@hotmail.com , bhin_999@hotmail.com, cwatchanida.c@psu.ac.th , dorawan.si@psu.ac.th * corresponding author : maimoon_sattar@hotmail.com Keywords: Activated Carbon, Polysulfone, Adsorption Abstract Polysulfone/Activated Carbon (PSF/AC) composites in bead form were prepared for Rhodamine B sorption.
(a) (b) Fig. 1 Structure of (a) Polysulfone and (b) Rhodamine B Materials and methods Materials Activated carbon (AC) was obtained from Sigma – Aldrich, UK.
Fourier-transform infrared spectrophotometry (FT-IR, EQUINOX 55, Bruker) were carried out to study the chemical structure of the samples in frequency range of 400 – 4000 cm-1. 3.
Acknowledgement The author is grateful to the Graduate School, Prince of Songkla University and Department of Chemistry, Faculty of Science, Prince of Songkla University for financial support.
E-Journal of Chemistry, 5: 187-200

Synthesis of Al3Ti(PO4)4.3333 and Its Selectivity to Li+ Exchange JinHe Jiang MicroScale Science Institute , Department of Chemistry and Chemical Engineering ,Weifang University, Weifang, 261061,China Corresponding author.
The researches of lithium-ion which has a specific selective memory function inorganic ion exchanger are carried out actively, especially the metal compound with inverse spinel structure showed the exchange memory to Li+[3-4].
The structure of compound metal oxide Al3Ti(PO4)4.3333 crystallized at 770℃ was much perfect.
Rare Metal, 2007,26(6),121 [2] Y.F.Liu, Kenta Ooi: Inoranic ion exchanger with ion-memery ability, J.Ion Exchange and Adsorption. 1994,10(3),246 [3] D.Q.Dong, J.Zhong, D.L.Liu, Y.F.Liu: LiCu0.5Mn1.5O4 synthesis and Li+ extraction/reaction with it in the aqueous phase, J.China Journal of Applied Chemistry . 1998,15(3),11 [4] Zhong h..
Prpperty of H2TiO3 type ion-exchangers and extraction of lithium from brine of natural gas wells J.Chinese Journal of Applied Chemistry.2000,17(3),307

Therefore, this work aims at understanding the chemistry and color change that occur during weathering of WPC.
Understanding the chemistry of wood plastic composites weathering.
Surface chemistry changes of weathered HDPE/wood-flour composites studied by XPS and FTIR spectroscopy.
In The Chemistry of Solid Wood., Ed.
In Wood and Cellulosic Chemistry, Ed.

Wavenumber stands for the different functional group: 1150 cm-1, 1124 cm-1 and 1103cm-1 stand for C-O-C and C-C, C-H stretch; the peak at 1047 cm-1 stands for crystallization structure of starch, but the peak at 1022 cm-1stands for amorphous structure of starch[9].
This continuous network structure composed of amylose and amylopectin was affected by re-crystallized of rice starch.
Corke: Cereal Chemistry, 1999, 76, p.861 [2] Yoen yong, budd hagal, S., & A.
Noohorm: Cereal Chemistry, 2002, 79, p.481 [3] A.
Delcour: Cereal Chemistry. 1995, 72, p.480–487 [9] A.L.M.

The crystal structure were assessed using powder x-ray diffraction crystallography (PXRD).
In this study, the amount of the structure-directing agent (SDA) was modified but based on physical appearance, similar white powder products were still obtained for both OPA-MOF A and B.
This data suggests that the obtained white powder is not just a physical mixture of the amorphous precursors, but has formed an ordered structure.
This also means that increasing the content of the SDA does not affect the general crystal structure of the material.
Coordination Chemistry Reviews, 253(23), 3042-3066

Pemble: Asian Journal of Chemistry Vol. 30 (2018), Pp. 1617-1620 [7] S.C.
Pemble: Journal of Material Chemistry Vol. 22(24) (2012), pp. 11978-11987 [8] R.A.A.
Yusoff: Journal of Solid State Chemistry Vol. 275 (2019), pp. 30-37 [10] S.
Mulvaney: Coordination Chemistry Reviews Vol. 249 (2005), pp. 1870-1901 [14] H.
Narayana: Journal Physicsl Chemistry C Vol. 111 (2007), pp. 4388-4392

The core-shell structure was observed using phase contrast microscope.
The micro-structure was observed by using optical microscopy (OM, Olympus, 200×).
One can find distinct core-shell structures of these microcapsules.
Zou: Chinese Journal of Chemistry 22 (2004), p. 411 [3] J.K.
Yang: Journal of Industrial and Engineering Chemistry 7 (2001), p. 358 [4] X.L.