Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: August 2014
Authors: Su Fen Zhao, Li Qong Zhang, Xiao Yan Liu, Zhi Gang Tu, Chen Zhang
We sprayed metal on its fracture surface and observed the surface’s morphological structure.
The interior structure of polymerization products could be observed through the SEM as shown in figure 2.2.
Many particle-like structures could be seen in the formed film under SEM.
Besides, the distance between the materials was determined by the size of those particle-like structures.
Organosilicon polymer chemistry [M].
Online since: February 2014
Authors: Jie Wu, Ying Zhu, Hong Bin Chen
Molecular structure: C7H12O+ C5H8O+ Figure 1: The mass spectrum Theoretical calculations In 3-21G * basis, we set optimization of C7H12O+ hull structure with the density functional B3LYP method, and frequency calculation at the same level, The results showed no imaginary frequency, the configuration has been optimized for a minimum energy structure.
Take C7H12O+ stable structure as the basis, we use the CIS method C7H12O+ ground state of the optimized calculated internal coordinates as input, using the CIS method, 3-21G * basis set C7H12O+ low-lying excited states of stable structures, then do optimization (OPT) exhaustion, calculate its frequency, so there is no imaginary frequency, at this time it shows that the ionic configuration for the excited state of the stable ground state geometries.
C7H12O+ structure shown in Figure 2: Figure 2: C7H12O+ structure We use the CIS method, the 3-21G * basis sets for calculating the configuration of different excited state vibration frequencies. 
The basic principles of quantum chemistry and ab initio calculation [M].Beijing: Science press, 1985 [3] Lubman D M, Naaman R, Zare R N.
Online since: February 2013
Authors: Jenn Kai Tsai, Teen Hang Meen, Chien Jung Huang, Shi Mian Chao, Tien Chuan Wu, Yi Ting Jhuo, Jun Xiang Wang, Wen Ray Chen
During the experiment, we change not only the film thickness and structure of TiO2 but also the dye of working electrodes.
[9] Jin-Kook Lee, Bo-Hwa Jeong, Sung-il Jang, Young-Guen Kim, Yong-Wook Jang, Su-Bin Lee, Mi-Ra Kim, 2009, “Preparations of TiO2 pastes and its application to light-scattering layer for dye-sensitized solar cells”, Journal of Industrial and Engineering Chemistry, 15, 724-729
[10] In Gyoung Yu, Yong Joo Kim, Hark Jin Kim, Chongmu Lee,Wan In Lee, 2010, “Size-dependent light-scattering effects of nanoporous TiO2 spheres in dye-sensitized solar cells”, Journal of Materials Chemistry.
Online since: February 2018
Authors: Petr Louda, Hristo Bahchedzhiev, Nikolay Petkov, Pavel Kejzlar, Totka Bakalova, Pavla Capkova, Martin Kormunda, Petr Rysanek
The morphology, structure and composition of TiCN have been investigated in several studies [2–5].
The surface chemistry is investigated by X-ray photoelectron spectroscopy (XPS) analysis.
The slight changes in the plasticity index are probably due to the changes in the structure.
Bamberger, Structure refinement of titanium carbonitride (TiCN), Materials Letters, Vol. 35, pp. 344 - 350 (1998)
Tribological development of TiCN coatings by adjusting the flowing rate of reactive gases, Journal of Physics and Chemistry of Solids 90 (2016), pp. 45–53.
Online since: January 2026
Authors: Chaymae Tsouli, Nordine Nouayti, Anas Otmani, Karim Idoumajoud, Ouadie Kabach
The tectonic structure of the Fez-Meknes aquifer, located between the Rif and the Middle Atlas, suggests a potential impact from tectonic processes similar to those observed in the neighboring Nekor Basin [8].
The first two principal components (Dim1 and Dim2) were retained because they explain the majority of the data variability, providing a clear overview of the main factors influencing groundwater chemistry.
The observed minor alkalinity is likely linked to the presence of Lias limestone formations, which affect groundwater chemistry [11].
Taupin, ‘Moroccan Journal of Chemistry Hydrochemical characterization of groundwater in the Nekor basin located in the North-East of the Rif of Morocco’, 2017.
El-Yamine, ‘Reconnaissance de la structure géologique du bassin de saïss occidental, Maroc, par sondages électriques’, Journal of African Earth Sciences, vol. 32, no. 4, pp. 777–789, 2001, doi: 10.1016/s0899-5362(02)00054-4
Online since: March 2022
Authors: Ei Ei Thin, Pitikarn Kanjanapruk, Kanawan Pochanakom, Sathit Niratisai
Introduction The organic azides are important substrates for making useful compounds in various fields including chemistry, biology, medicine, and material science [1].
In addition, azides are useful intermediates for synthesizing nitrogen containing chemical compounds such as triazoles in click chemistry.
Sharpless introduced one of the well-known reactions of click chemistry known as a copper-catalyzed azide-alkyne cycloaddition reaction (CuAAC) to increase reaction rate and more regioselective [7, 8].
Entry Compd Conventional Microwave-Assisted Temp ([°C] Time [h] Yielda [%] Temp [°C] Time [min] Yielda [%] 1 6a 25 24 61 70 15 60 2 6b 25 24 42 70 15 69 3 6c 25 24 52 70 15 59 4 6d 25 16 59 70 15 45 5 6e 25 22 52 70 15 55 6 6f 25 24 56 70 15 58 7 6g 25 12 59 70 15 57 a Yield refers to the isolated product after column chromatography The structure of synthesized compounds were characterized by FTIR, 1H NMR, 13C NMR and mass spectrometric methods and results provided good evidences for the formation of desired compounds.
Funk, Method for assigning structure of 1,2,3-triazoles, J.
Online since: October 2019
Authors: Jun Lin Xie, Xiao Qing Liu, Peng Hui Wu, Jia Ming Yang, Wen Hao Yang, Chi Mao
Microstructure and lattice structure analysis were performed by JEM-2100F field emission high resolution transmission electron microscopy.
On the contrary, nano-ZnOs prepared above 400℃ show obvious regular hexagonal structure(Fig. 5-c,5-d and 5-e).
Electron diffraction analysis of porous nano strips of nano-ZnO samples shows that, from 300℃ to 500℃, all nano-ZnO’s structures are hexagonal wurtzite structure, which is consistent with XRD analysis.
Choi, et al, Environmental applications of semiconductor photocatalysis, Chemistry Rev. 95. 1 (1995) 69-96
Wang, et al, Large scale fabrication of quasi-aligned ZnO stacking nanoplates, The Journal of Physical Chemistry C. 112. 14 (2008) 5267-5270
Online since: October 2008
Authors: Celso Aparecido Bertran, L.J.M. Allegretti
A. 2,b 1, 2 State University of Campinas - Chemistry Institute, PO Box 6154 - Postal Code: 13084-862 Campinas/SP, Brasil Phone: (55 19) 35213134 or 35213036 a lauterallegretti@uol.com.br, bbertran@iqm.unicamp.br Keywords: Mineralization, collagen, Homogeneous precipitation, calcium phosphate.
Precipitation of particles associated with matrix structuring was carried out by adsorption of gaseous ammonia.
Precipitation of particles associated with matrix structuring was carried out by adsorption of gaseous ammonia, witch increases pH and slowly mineral phase appears.
Online since: July 2014
Authors: Wu Qin, Qu Li, Chang Feng Lin, Jun Jiao Zhang, Wei Liang Cheng
Reaction activities of Ni-doped and Cu-doped Fe2O3 oxygen carriers (OCs) with CO were investigated using thermo gravimetric (TG-DTG).The structures of the prepared OC were characterized by X-ray diffract meter (XRD).TG-DTG investigations indicated that rational Ni and Cu doping could efficiently enhance the reactivity of Fe-base oxygen carrier for oxidizing CO under different conditions.
This paper focuses mainly on the reaction of Fe2O3 OCs with CO by TG-DTG, the structure of the prepared oxygen carriers were characterized by X-ray diffraction (XRD).
Industrial and Engineering Chemistry Research, Vol. 35 (1996), p. 2469
Online since: October 2011
Authors: Jian Mei Zhou
Recycling lanolin from Tannery wastewater by Mixed Flocculation and extraction processing Jian Mei ZHOU (School of Chemistry and Chemical Engineering,UST Inner Mongolia,Baotou 014010,China) zhouzhou1015@yahoo.com.cn Key words : Lanolin; Mixed Flocculation And Extraction;Tannery Wastewater; Recovery Rate Abstract.
Comparing the main indexes and the infrared spectra of recycling lanolin with the industry level lanolin, the results indicated the main indexes of the recycling lanolin achieved the industry level standard, and both similar spectrogram showed the component and the structure of recycling lanolin are almost similar with industry level lanolin.
Figure 3 and figure 4 showed the two spectra are very similar, which also indicated the structure and constitution of the two lanolin are basically similar.