Search results

They [6,7] also reported another new peritectic ternary phase with MgNi2-type (C36) structure having a homogeneity range from Al1.72CaZn0.28 to Al1.32CaZn0.68.
In 1984, Cordier et al. [8] reported the crystal structure of another ternary compound Al2CaZn2 as an ordered Al4Ba-type structure.
The homogeneity range and crystal structure of IM2 in the KS3 and KS4 was determined using EPMA.
Terasaki, Crystal structures and phase stability in pseudobinary CaAl2-xZnx, Journal of Solid State Chemistry, Vol. 179, Issue 8, 2006, pp. 2690–2697
Corbett, Two new binary Calcium-Aluminum compounds: Ca13Al14, with a novel Two-Dimensional aluminum network, and Ca8Al3, and Fe3Al-Type, Inorganic Chemistry, Vol.37, 1998, pp. 5827-5833.

Study on the Rate Performance of LiCo1/3Ni1/3Mn1/3O2 Dongyun ZHANG1, Juan YI2, Qun WEI3, Kun LIU1, Zhenzhen FAN2 and Peixin ZHANG2* 1 School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China 2 School of Chemistry and Chemical Engineering, Shenzhen University, Shenzhen 518060, China 3 School of Science, Xidian University, Xi’an 710071, China *Corresponding author Email: pxzhang2000@163.com Keywords: LiCo1/3Mn1/3Ni1/3O2; electrochemical performance; AC impedance Abstract.
Currently hot cathode materials are mainly olivine-type LiFePO4, LiCoO2 and LiNiO2 with layered structure, and LiMn2O4 with spinal structure.
LiMn2O4 is rich in raw materials, but its structure is unstable and prone to Jahn-Teller effect, which leads to poor cycling performance [4, 5].
In 2003, Naoaki[6] first synthesized LiCo1/3Mn1/3Ni1/3O2, and its excellent performance has attracted great interest[7], including structure studies[8, 9] and charge-discharge mechanism studies[10, 11].
It not only has the advantage of high capacity by layered structure, but also can maintain the stability of layered structure and has excellent cycling performance, which makes it a potential lithium-ion battery cathode material.

This fact leads to the formation of a highly porous structure of the final composite.
Frolova, Evaluation of surface activity of highly dispersed raw materials for composite building materials, Physics and chemistry of materials processing. 2 (2015) 68-72
Roldugin, Physical chemistry of surfaces, textbook, monograph, Intelligence, Dolgoprudny, 2008
Glezer, Amorphous and nanocrystalline structures: similarity, differences, mutual transitions, J.
Pospelova, Criteria for evaluating energy properties of a surface, Nanosystems: physics, chemistry, mathematics. 2(4) (2011) 1-6

Chimsook1 1Faculty of Science, Program of Chemistry, Program of Applied Chemistry, Maejo University, Chiang Mai, Thailand 50290 Corresponding author: pitiporn@mju.ac.th, thitiphan.cs@gmail.com Keywords: Rose oil, Rose extract, Inclusion complexes, b-Cyclodextrin Abstract.
This structure allows β-CD to encapsulate essential oils and extracts effectively due to their compatible physical properties.
(a) (b) Fig. 1 Morphological structure of 𝛽-CD (a) and RO-𝛽-CD using 40% ethanol (b).
These diffraction lines correspond to beta-cyclodextrin decahydrate with a monoclinic structure, as indexed by the JCPDS card 00-054-1476.
The authors would like to thank Agri Inno., Program of Applied Chemistry, Chemistry, Faculty of Science, Maejo University for the facilities provided to conduct the study.

C.) were used for synthesizing hierarchically structured barium carbonate (BaCO3) at the nanometer scale.
Synthesis of BaCO3 particles in B.C. structured equilibrium microemulsions We also synthesized BaCO3 particles by mixing the middle-phase equilibrium B.C. structured microemulsions containing BaCl2 and Na2CO3, respectively.
Feliu, Synthesis of Pt nanoparticles in water-in-oil microemulsion: effect of HCl on their surface structure, J.
Lieber, Chemistry and physics in one dimension:  synthesis and properties of nanowires and nanotubes, Acc.
Scriven, Equilibrium bicontinuous structure, Nature 263(1976)123-125

The results show that the pore structures of ACs prepared by MW and EF heating significantly enhance when the weight ratio of KOH to coal increases from 2 to 4.
The pore structures of ACs including BET specific surface area, pore volume and pore size distribution were investigated by N2 adsorption at 77K, the crystallite structure and surface morphology were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM).
Results and discussion Pore structures of activated carbons.
This observation is supported by the pore structures measurement through N2 adsorption and XRD analysis of ACs.
Huang: Acta Phys., Vol. 25 (2009), p. 757 [7] D.Kalpana, S.H.Cho and S.B.Lee: Journal of Power Sources, Vol. 190 (2009), p. 587 [8] Ting Yang and Aik Chong Lua: Chemistry and Physics, Vol. 100 (2006), p. 438 [9] Yanping Guo and David A.

This is due to the presence of a hydroxyl group within the berberine skeleton compared to the structure of aporphine and oxoaporphine alkaloids which contained only methoxy and methylenedioxy groups.
The structure of compounds (4) and (3) must be taken into account whereby substituents at C-1 and C-2 are methylenedioxy and methoxy, respectively.
Sharma, Chemistry and biological activities of the genera Tinospora, International journal of pharmacognosy 33(1995) 277-287
Yusoff, UPLC-QTOF/MS-based phenolic profiling of Melastomaceae, their antioxidant activity and cytotoxic effects against human breast cancer cell MDA-MB-231, Food chemistry 265 (2019) 253-259
Structural aspects, Bioorganic & medicinal chemistry 12 (2004) 4709-4715

Cellulose Modification with Maleic Anhydride Velta Fridrihsone1,2,a*, Juris Zoldners1,b, Marite Skute1,c, Laura Andze1,d, Inese Filipova1,e 1Latvian State Institute of Wood Chemistry, Dzerbenes Street 27, LV-1006, Riga, Latvia 2Institute of Polymer Materials, Faculty of Material Science and Applied Chemistry, Riga Technical University, Paula Valdena Street 3, Riga, Latvia avelta.fridrihsone@kki.lv, bjzold@edi.lv, cpolarlapsa@inbox.lv, dlaura.andze@kki.lv, einese.filipova@kki.lv Keywords: Cellulose, maleic anhydride, esterification, cellulose modification Abstract.
However, cellulose is difficult to modify due to its structure – glucose chains form stiff rod-like conformation, aided by the equatorial conformation of glucose residues.
To tackle acidity organic compounds must have alkali or alkaline element in its structure such as sodium, potassium, calcium.
Acknowledgements Financial support for this research is from Latvian State Institute of Wood Chemistry Bio-economics grant “CelFunVol2”.
Kostić, Regenerated Cellulose Fiber Functionalization by Two-step Oxidation Using Sodium Periodate and Sodium Chlorite –Impact on the Structure and Sorption Properties, Fibers Polym. 22 (2021) 2177-2186. 10.1007/s12221-021-0996-8 [13] F.T.

Phase structure and dielectric properties of Bi2O3-ZnO-Nb2O5 dielectric ceramics.
Journal of Materials Chemistry 15: 3501-3506
Structure, IR spectra and dielectric properties of Bi2O3-ZnO-SnO2-Nb2O5 quarternary pyrochlore.
Journal of Solid State Chemistry 168(1): 69-75
Journal of Solid State Chemistry 180(9): 2558-2565.

An Acridinium Ester for Determination of Serum Arylesterase Activity in Patients with Coronary Heart Disease Yuhua Gong1, a, Xiaojing Mu1, a , Zhitao Chen1, a, Zulipiyan Abulimite1, a Min Liu2,b, and Yunyun Chen1, a 1 Pharmacy Department, School of Chemistry & Chemical Engineering, Chongqing University, Chongqing, China, 400044 2 Chemistry Department, Tongji Medical School, Huazhong University of Science & Technology, Wuhan, China, 430074 amuxiaojingcn@yahoo.com.cn, blmwjcom@yahoo.com.cn Keywords: Arylesterase activity; Acridinium ester; Coronary heart disease; Age Abstract.
According to chemical structure of the artificial substrates used in determination, they are classified as phosphorous esters, arylesters, and lactones, and the corresponding determined PON activity are called phosphatase activity, arylesterase activity and lactonase activity [10].
The phenyl acetate of analytical grade was purchased from Aladdin Chemistry Co. ltd (Shanghai, China).
Possibly, as the enzyme structure changes with age, the catalytic ability toward the phenyl acetate keep unchanged, but the catalytic ability toward other substrates such as paraoxon or the CPOCMA decreased.
It hinted that the decrease of serum PON activity in the old people or in the CHD inpatients was possibly due to the mutation of PON structure rather than PON concentration.