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Online since: February 2015
Authors: Anastasya Timofeeva, Stepan Yusin, E.A. Maximovskiy, Arina Ukhina, Alexander Shibaev, Ksenya Dyukova, Alexander Bannov
Karla Marksa 20, Novosibirsk, 630073, Russia 2Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, pr.
Akademika Lavrent’eva 3, Novosibirsk, 630090, Russia 3Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, str.
Exfoliated graphite has a graphite structure with expanded crystal lattice and low density.
The interplanar distance in the structure of GO differs significantly from the that of graphite and varies in the range of 3.4 to 12 Å [7-9].
EG forms the porous structure during the synthesis.
Online since: July 2012
Authors: Shan Shan Huang, Su Xi Wu, Rui Xin Liu, Fei Yao
Effect of microwave treatment on the extraction speed and quality of Camellia seed oil Ruixin Liua, Fei Yaob, Suxi Wuc, Shanshan Huangd School of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha 410114, China; aLiurx8@163.com, bfei5053@126.com, cwsx6524@163.com, dlongteng880830@163.com Keywords: Camellia seed oil, Microwave treatment, Oil quality, Fatty acid composition Abstract.
This study analyzed the microscopic structure with and without microwave treatment by scanning electronic microscope in order to research the relationship between camellia seed structure and cell walls damage caused by microwave treatment, which can probably make solvent infiltration and extraction more effectively.
As a result, cell structure of sample were broken, and the bursting of cell membranes primely contributed to the formation of the channel for oil to flow in the membranes.
surface structure without micowave treatment B.
Food Chemistry.
Online since: September 2014
Authors: Suzana Yusup, Yoshimitsu Uemura, Yi Herng Chan, Armando T. Quitain
In the liquefaction process, biomass is treated with solvent/s at high temperature and pressure which acts as a good medium and reactant to break down the complex structure of biomass, thereby producing liquid products.
The properties and the surface structure (SEM imaging) of the oil palm biomass are characterized and shown in Table 1 and Figure 1, respectively.
Thus, it has a less uniform structure and lower degree of crystallinity [7] and can be easily decomposed at lower temperatures between 210-330 °C.
Thus, higher temperature between 300-375 °C is needed to break down and degrade the cellulose structure from the matrix structure of biomass.
Crocker (Ed.), Thermochemical Conversion of Biomass to Liquid Fuels and Chemicals, The Royal Society of Chemistry, United Kingdom, 2010
Online since: July 2015
Authors: Stepan Alexandrovich Lushnikov, Tatyana Victorovna Filippova
The Stability of CeNi3-Based Intermetallic hydrides LUSHNIKOV Stepan Alexandrovich1, a *and FILIPPOVA Tatyana Victorovna1,b 1Department of Chemistry Lomonosov Moscow State University, Moscow 119991, Russia alushnikov@hydride.chem.msu.ru, btania.filippova@inorg.chem.msu.ru Keywords: intermetallic compounds, metal hydrides, phase’s transition, diffusion of hydrogen atoms.
The group of RT3 intermetallic compounds (R-rare earth metal, T - Fe, Co, Ni) crystallizes in PuNi3 (space group R-3m, No. 166) and CeNi3 (space group P63/mmc, No. 194) structure types.
The structure of CeNi3 consists of RT2 (MgZn2 structure type) and RT5 (CaCu5 structure type) blocks, which alternate in the direction perpendicular to the z-axis.
Yartys, New aspects of coordinate chemistry of hydrides of intermetallic compounds: “isotropic” and “anisotropic” structures, Koord.
Online since: July 2011
Authors: Pinsuda Viravathana, Narathorn Sukwises, Siriporn Boonpa, Siriporn Larpkiattaworn
Subsequent thermal treatment of this hydroxide leads to crystalline phase transition and the loss of hydroxide groups, which is liberated as water leaving alumina structure [9].
Catalyst characterization The phase and crystal structure of supports and catalysts were obtained by XRD.
After increasing the sintering temperature to 1300ºC, the mullite structure was initially formed, when increasing the sintering temperature to 1400ºC, the intensity of mullite phase was increased whereas the contaminations from the cristobalite phase and the alumina phase were decreased.
From the characterization, the support structure was consisted of cristobalite, corundum, mullite, and alumina; the metal oxide on the catalyst surface was in the form of MnWO4.
Acknowledgements Financial supports from the Department of Chemistry, Faculty of Science, Kasetsart University, and the National Center of Excellence for Petroleum, Petrochemicals and Advanced Materials (NCE-PPAM) are gratefully acknowledged.
Online since: July 2011
Authors: Qiao Feng, Ling Zhi Du, Qing Zhi Yan, Chang Chun Ge
The effects of solvent composition on the propagating features of polymerization front and on the gel structures of final products were investigated.
The scanning electronic microscope (SEM) images (Figure 2) revealed that all samples in different synthesis-solvent exhibited interconnected porous structures, while the pore shape of them were different.
However, the samples of FPE and FPT are characterized by honeycomb and honeycomb-like porous structures, respectively.
SEM micrographs revealed that all PNIPAm hydrogels displayed interconnected porous, and the different mixed solvent resulted in different pore structure, which can account for the difference in swelling capability.
P., Principles of Polymer Chemistry.
Online since: July 2021
Authors: Natalia S. Goltsman, Dmitriy M. Kuzmenkov, Lyubov A. Yatsenko, Boris M. Goltsman, Elena A. Yatsenko
Foam structure of compositions 2 and 5 The figure shows that with an increase in temperature from 800 to 825 °C, the viscosity of the mass decreases so much that the pressure of the foaming gases forms a porous structure.
Appen, Chemistry of Glass [in Russian], Khimiya, Moscow, 1974
Shelby, Introduction to Glass Science and Technology, second ed., The Royal Society of Chemistry, Cambridge, 2005
Baak, The action of calcium fluoride in slags, in: The physical chemistry of steelmaking, Chipman and Hall, London, 1958
White, The structure of the liquid silicates.
Online since: January 2004
Authors: Tetsuya Hirade
This model can explain almost all of the results with a knowledge of radiation chemistry.
Sometimes the spur model can give new information for radiation chemistry [see pp.129 of ref.6, 8].
µ is the magnetic moment of the electron and 0 h is the hyperfine structure splitting between o-Ps and p-Ps in vacuum.
Eldrup: Radiation Physics and Chemistry, Vol. 58, (2000), P. 465 [5] Tetsuya Hirade: Radiation Phys. and Chem., Vol. 68, (2003), p. 375 [6] O.
Positron Annihilation in Chemistry (Springer, Berlin) [7] O.
Online since: September 2013
Authors: Ji Wei Hu, Chun Liu, Su Ming Duan, Jin Luo, Miao Jia, Zhi Bin Li
Comparison Study on Adsorption and Removal of Antimony from Acidic Aqueous Solution by Activated Carbons and Machine-made Charcoal Miao Jia1, a, Jiwei Hu1, b,*, Jin Luo1, c, Suming Duan1, d, Zhibin Li1, e, Chun Liu1, 2, f 1 Guizhou Provincial Key Laboratory for Information System of Mountainous Areas and Protection of Ecological Environment, Guizhou Normal University, Guiyang, 550001, China 2 School of Chemistry and Materials Science, Guizhou Normal University, Guiyang, 550001, China ajiamiao20101@163.com, *bCorresponding author: jiweihu@yahoo.com, jwhu@gznu.edu.cn, cluojin765@gmail.com, dduansumingzz@163.com, elizhibino816@126.com, fqianlongdabao@163.com Keywords: activated carbons, machine-made charcoal, adsorption, antimony, kinetics Abstract.
The chemistry of antimony and its natural occurrence in some water resources combine to create a potent, widespread human health risk.
It has been reported that the results of BET measurements of specific surface areas and pore volume for many activated carbons samples suggested that these indicators were excellent indicators of the carbon’s pore structure.The samples with a high iodine number had a large specific surface area and plenty of small micropores (pore diameter > 1.0 nm).
Maeda, Adsorption and removal of antimony from aqueous solution by an activated Alumina, Toxicological and Environmental Chemistry. 80(2001) 133-144
Norman, Chemistry of arsenic, antimony and bismuth, Blackie Academic & Professional, Thomson Science, London, UK, 1998, 193-199
Online since: March 2020
Authors: Faizah Yunus, Siti Nor Atika Baharin, Muhammad Syazwan Kassim, Syed Shahabuddin, Nur Rahimah Said
Boron Nitride Doped Polypyrrole Hybrid Composites for Photocatalytic Degradation of 2-Chlorophenol from Aqueous Solution Faizah Yunus1,a, Muhammad Syazwan Kasim1,b, Syed Shahabuddin2,c, Nur Rahimah Said1,d and Siti Nor Atika Baharin1,e* 1School of Chemistry and Environment, Faculty of Applied Sciences Universiti Teknologi MARA, Negeri Sembilan Branch, Kuala Pilah Campus, 72000 Kuala Pilah, Negeri Sembilan, Malaysia 2Research Centre of Nanomaterials and Energy Technology, School of Science and Technology, Sunway University, No. 5, Jalan Universiti, Bandar Sunway, 47500 Selangor, Malaysia afaizahyns95@gmail.com, bsyazwan.kasim@gmail.com, csyeds@sunway.edu.my, dnurra1435@uitm.edu.my, e*atikabaharin@uitm.edu.my Keywords: Boron nitride (BN), polypyrrole, photocatalytic degradation, 2-chlorophenol Abstract.
Structure phase arrangements of the samples were determined using X-ray Diffractometer (XRD) Panalytical model Empyrean at 40 kV and 35 mA using Cu, Kα radiation is λ= 1.54059 Å.
We also acknowledge School of Chemistry and Environment in the Faculty of Applied Science at UiTM Negeri Sembilan, Kuala Pilah Campus for the facilities that have been provided for the research.
Arabian Journal Of Chemistry. 11 (2018) 1000-1016
Journal of Industrial and Engineering Chemistry. 36 (2016) 184-193