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Online since: December 2014
Authors: V.S. Yemelyanova, B.T. Dossumova, Zh.K. Kairbekov, T.V. Shakiyeva, Zh.K. Myltykbaeva, U.N. Dzhatkambayeva, E.M. Shakiyev, E.Zh. Aybasov, H. Kurokawa
The composition and structure of the microspheric aluminosilicates of Combined Heating and Power Plants (CHРP) ashes is studied with the help of modern physical-chemical methods (XRD, scanning electron microscopy, BET, elemental and chemical analysis).
The cenospheres surface structure was studied using scanning electron microscope (S-2400 produced by Hitachi High-Technologies Corporation) at an accelerating voltage 15kV.
EPR data show that iron (III) is mainly in two main forms: single ions Fe3+ in glass and in particles of magnetic-ordered phase of a spinel structure with the size 30-50 Å at iron content 3-4 mass % of Fe2O3.
The Fe3+ ions discovered by the EPR method in glass phase as single centers, probably, have a small occupancy and/or the parameters of its hyperfine structure are close to parameters of Fe3+ (6) in spinel.
Anshits, Nature of crystal phases nanoparticles in cenospheres and morphology of their shell, Glass Physics and chemistry, 2004, 30(3). p. 334-345.
Online since: May 2014
Authors: Dong Xian Zhuo, Yan Hua Guo, Li Xin Wu, Lin Ma, Zi Xiang Weng, Rui Wang
A Facile and Efficient Method to Prepare Exfoliated and Reduced Graphene Nanosheets by Detonation Yan-hua GUO1,a Dong-xian ZHUO1,b, Li-xin WU1,*, Lin MA1,c, Zi-xiang WENG1,d, Rui WANG1,e 1State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China aguoyanhua28@fjirsm.ac.cn, bdxzhuo@fjirsm.ac.cn, cling@fjirsm.ac.cn, dwzx@fjirsm.ac.cn, ewangrui@fjirsm.ac.cn *lxwu@fjirsm.ac.cn Keywords: Low-temperature exfoliation, Few-layered graphene nanosheets, Detonation.
NG showed a sharp and intensive (002) peak at 26.3 o, indicating a highly ordered crystal structure with an interlayer spacing of 0.330 nm.
The corrugation is intrinsic to EP-RO, which results from the fact that the two-dimensional membrane structure becomes thermodynamically stable via bending.
(D) Typical AFM image of as-prepared ER-GO Raman Spectroscopy Raman scattering is strongly sensitive to the electronic structure and proves to be an essential tool to characterize graphite and graphene materials.
The G band and D band are attributed to the first-order scattering of the E2g vibrational mode in the graphite sheet and structure defects, respectively.
Online since: July 2022
Authors: Mikhail G. Bruyako, Olga V. Aleksandrova, Daria Golotenko
At a rarefaction of more than 250 mm Hg, the destruction of the forming structure occurs.
So, photos 7,8,9 show the structure of phenolic foam obtained under reduced pressure.
It can be traced that in the transition from the periphery to the center, the structure of the foam based on phenol-formaldehyde oligomers changes: the peripheral zone has a denser structure than the central one.
Its structure during the transition from the periphery to the center remains practically constant and is characterized by large pores.
L.: Chemistry, 1978, p. 292
Online since: October 2022
Authors: Sunil Rohilla, Pinki Rani, Ajay Singh Verma
All the three-D structures were developed using online structure developer and the suitable reference have been cited against each structure.
Result and Discussion XRD Analysis XRD is used to determine the V2O5/TiO2 crystal structure.
TiO2 Crystal Structure Shown in Fig 2 and V2O5 Crystal Structure Shown in Fig 3 [18,19].
TiO2 crystal structure FIGURE 3.
Wachs, Impact of Hydration on Supported V2O5/TiO2 Catalysts as Explored by Magnetic Resonance Spectroscopy, in: The Journal of Physical Chemistry C 2021, 125(30), 16766-16775
Online since: September 2013
Authors: Tao Jiang, Ying Ding, Yong Shen
Kapok fiber has a unique large thin-walled hollow structure, lightweight and water repellent oil of excellent features, and is not yet fully exploited the small breed natural fibers.
Yang: Journal of Materials Chemistry, Vol.22 (2012) No.32, p.1306.
Online since: May 2011
Authors: Run Cang Sun, Xin Wen Peng, Jun Li Ren, Feng Peng
Rapid Carboxymethylation of Xylan-rich Hemicelluloses by Microwave Irradiation Xinwen Peng1,a, Junli Ren1, b,*, Feng Peng2,c, and Runcang Sun1,2,d,* 1State Key Laboratory of Pulp and Paper Engineering, South China University of Technology Guangzhou, Guangdong, 510640, China 2Institute of Biomass Chemistry and Utilization, Beijing Forestry University, Beijing, 100083, China awenwenpeng1229@163.com, b,*renjunli@scut.edu.cn (Corresponding author), cpengfeng@bjfu.edu.cn, d,*rcsun3@bjfu.edu.cn (Corresponding author) Keywords: Xylan-rich hemicellulose, Carboxymethylation, Microwave Rrradiation, 13C NMR.
The structures of hemicelluloses before and after the chemical modification were analyzed by 13C nuclear magnetic resonance (NMR) spectra.
Online since: August 2013
Authors: Bin Liu, Tong Hua Zou, Qiao Di Hong, Xiao Yan Song, Chen Hao Li
It is introduced about the characteristics, structure and application of refrigerator for vaccine transportation.
[8] Chemistry Division,Oak Ridge National Laboratory,P.O.Box X,et al.Application of Differential Scanning Calorimetry to the study of thermal energy storage.Thermochimica Acta.1978(26):39-47
Online since: October 2014
Authors: Yong Ming Luo, Yong Dong Luo, Hua Liu, Fang You Chen, Jian Jiang Fu
The structures of the isolated compounds were established by means of NMR and MS analyses.
Thus the structure of 2 was determined as 4β, 8β-dihydroxy- 5α(H)-eudesm-7(11)-en-8,12- olide[5].
On the basis of relevant reference[9] and its spectral data, its structure was elucidated to be curcolonol.
On the basis of relevant reference [12] and its spectral data, its structure was elucidated to be daucosterol.
Vol. 75(2012), p.694 [6] Y.J Xu : Chemistry & Biodiversity.
Online since: September 2013
Authors: Guo Xin Xue, Fang Chen, Bo Hong, Xing Guo
This three-dimensional physical network structure constantly improved with the increase of nanoparticles [14,15].
In addition, the three-dimensional physical network structure would be destroyed by the external shearing force, resulting in the reduction of viscosity.
Process in Chemistry.
Extraction of natural bamboo fiber and the research on its structure and chemical propertie.
Structure Research of Several Natural Cellulose Fibers.
Online since: August 2017
Authors: Hairul Abral, Anwar Kasim, Adjar Pratoto, Mochamad Asrofi
The mechanical properties of several natural fibers depend on the type of cellulose structure.
There is a number of cellulose types structure namely was (I, II, III, IV, and V) respectively.
The type of cellulose structure I is the one of the most prominent due to having good mechanical properties compared to the other type of cellulose structure [2].
The morphology of NCC from WH fibers was measured by using TEM (JEM-1400, JEOL, Department of Chemistry, Gajah Mada University, Indonesia).
FTIR characterization was studied to determine the chemical structure of WH fibers.