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Online since: December 2009
Authors: Xiao Yu Hu, Ying Bo Chen
Chen) Tel:86-22-24528760, Fax:86-22-24519341 Key words: chemical crosslinked gel, structure, adsorption.
Adsorption properties of polymer gels obtained The gel prepared in this paper was formed chemical crosslinked, and the gel structure is relatively firm, meanwhile, parts of the molecular combined with polymers crosslinked by hydrophobic interaction.
Jing: Sci. in China Series B: Chemistry Vol. 52 (2009), p. 117 [2] S.
Online since: January 2026
Authors: Frantisek Lofaj, Petra Hviscova, Lenka Kvetková, Marian Mikula, Tomáš Roch, Dmitry Albov
The structure, chemistry, and phase composition of the coatings were investigated using scanning electron microscopy (SEM), transmission electron microscopy (TEM, model Jeol 2100F, Jeol, Japan), semi-quantitative energy dispersive X-ray spectroscopy, and X-ray diffraction (Rigaku Ultima IV) in q-q geometry, respectively.
Its structure was similar to that of Hf (COD: 1512510).
At x ≥ 5 sccm N2, well defined and single phase <111> textured fcc structure (Fm-3m space group (#225), a = 0.4478 Å) similar to the structure of HfN (COD: 1539404) appeared.
In the case of metallic coatings (RM-3ME-0N), the initial hcp structure of 3ME-0N transformed into bcc regardless of RM type.
Reece, Review of high entropy ceramics: Design, synthesis, structure and properties, J.
Online since: August 2013
Authors: Lei Jin, Kun Zou, Nian Yu Huang, Jun Zhi Wang, Hu Biao Fang
Synthesis and Structure Elucidation of Novel Oxime Ether Type H+/K+-ATPase Inhibitors Lei Jin1,a, Hubiao Fang1,b, Nianyu Huang1,c,*, Junzhi Wang1,2,d, Kun Zou1,e 1Hubei Key Laboratory of Natural Products Research and Development, College of Chemistry and Life Sciences, China Three Gorges University, Yichang, Hubei 443002, China 2Hubei Tujia Institute of Medicine, China Three Gorges University, Yichang, Hubei 443002, China a568346914@qq.com, bfhb147127@live.cn, chny115@126.com, dhorsedog@163.com, ekzou@ctgu.edu.cn Keywords: H+/K+-ATPase inhibitor, Tetrahydrobenzofuran, Oxime ether, Synthesis, Structure elucidation Abstract.
Results and discussion Synthesis and structure elucidation In this work, three pairs of 6,6-dimethyl-2-phenyl-6,7-dihydrobenzofuran-4(5H)-one oxime derivatives were synthesized and isolated with the aim of investigating the relationships between single geometric configuration of oxime derivatives and their H+/K+-ATPase inhibitory activities (Scheme 1).
Subsequent efforts to address the structure-activity relationship of these oxime ether derivatives and their anti-ulcer mechanism in vivo were under way in our research group.
Online since: March 2026
Authors: Shehla Honey, Urfa Muneer, Nadeem Arif, Katlego Makgopa, Javed Ahmad, M. Maaza
Due to this process structure can be easily changed by bond breaking and hence band gap is reduced [69-71].
Seifert, Structure, stability and electronic properties of TiO2 nanostructures. physica status solidi (b), 2005. 242(7): p. 1361-1370
[48] Wang, W., et al., Synthesis of CuO nano-and micro-structures and their Raman spectroscopic studies. 2010. 12(7): p. 2232-2237
Journal of Materials Chemistry, 2008. 18(41): p. 4964-4970
Journal of Solid State Chemistry, 2003. 175(1): p. 94-109
Online since: March 2012
Authors: Ahmed Salhi, Abderrahim Boudenne, Salah Kaci
The figure 4 shows a unique structure not found in any natural or synthetic fibers.
ESEM micrograph showing both the primary and the secondary structures of a poultry feather (Rachis and Barbs) Fig. 3.
ESEM micrograph showing the primary, the secondary and tertiary structures of a poultry feather (Rachis, Barbs and barbules) Fig. 4.
ESEM micrograph showing features of the tertiary structure of a poultry feather (barbules) Fig. 5.
[3] Jones LN, Riven DE, Tucker DJ: Handbook of fiber chemistry, Marcel Dekker, Inc., New York, (1998)
Online since: May 2007
Authors: Zhong Hua, Ya Juan Zhong, Dong Feng Li
Carbon fiber has turbostratic graphite structure.
The structure parameters La, Lc and d002 which used to reflect the size of turbostratic graphite and the degree of the graphitization are calculated by Scherrer formula.
Table 1: Tensile Strength and Structure Parameters of PAN-CF Specimens. * 2a, 2c is the minor axis and major axis of the ellipsoidal pore, respectively.
With the increasing of the graphitization temperature, the turbostratic graphite structure rearranges, which causes the pore in turbostratic graphite becoming bigger and bigger.
The increasing D is caused by the two-dimensional turbostratic graphite structure changing into three-dimensional ordered structure.
Online since: September 2017
Authors: Norli Abdullah, Noor Azilah Mohd Kasim, Nurjahirah Janudin, Imran Syakir Mohamad, Norshafiqah Mohamad Saidi, Mohd Junaedy Osman
The Influences of Chemical and Mechanical Treatment on the Morphology of Carbon Nanofibers Norshafiqah Mohamad Saidi1,a*, Noor Azilah Mohd Kasim1, Mohd Junaedy Osman2, Nurjahirah Janudin1, Imran Syakir Mohamad3,4 and Norli Abdullah2,b* 1Department of Defence Science, Faculty of Science and Defence Technology, Universiti Pertahanan Nasional Malaysia, Kem Sungai Besi, 57000, Kuala Lumpur, Malaysia 2Department of Chemistry, Centre for Foundation Studies, Universiti Pertahanan Nasional Malaysia, Kem Sungai Besi, 57000, Kuala Lumpur, Malaysia 3Faculty of Mechanical Engineering, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, Malaysia 4Centre for Advanced Research on Energy, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, Malaysia a*shafiqah.msaidi@yahoo.com, b*norli.abdullah@upnm.edu.my Keywords: acid treatment, surface oxygen functional group, Carbon Nanofibers Abstract.
CNFs are sp2-based linear filaments with complex structure compared to the structure of carbon nanotubes (CNTs) where the structure of graphene sheet of CNFs are stacking in varying shape.
Surface treatment using Method C displayed the structure of CNFs-MC develop more destruction and uneven surface occurred on the side wall.
Raman spectra can be categorised into two prominent peak that correspond to the characteristics of CNFs; peak in the range of 1250 cm-1 to 1450 cm-1 (D-band) is assigned to the disorder and defects of the structure of CNFs, whereas and 1500 cm-1 to 1605 cm-1 (G-band) related to the structural integrity of sp2-bonded carbon atoms in the two-dimensional hexagonal lattice, indicating the existence of crystalline graphitic carbon.
This is inline with our FESEM images that show method C breaks the some of CNFs structure [10], increases wall thickness and more defects.
Online since: June 2012
Authors: Yu Mei Zhu, Zhi Hong Li, Xing Fen Lv, Guang Tao Zhao
Compared with the microstructure of vitrified bond diamond abrasive holding for 80 min at 800˚C (see Fig. 2a), the structure (see Fig. 2b) of diamond abrasive was more dense and the diamond grits were more fully covered with vitrified bond.
It had been illuminated that the well combination between diamond grits and vitrified bond and the dense structure was a significant symbol to gain the diamond abrasive with admirable performance.
What’s more, it also implied that the compacted structure of diamond abrasive with less pores derive from the vitrified bond with the addition of CeO2.
In this experiment, the sintering temperature at 800 ˚C and the holding time for 120 min were discovered to be the optimal condition to obtain the admirable diamond abrasive with high dense structure and high mechanical property.
Sergio: Journal of Materials Chemistry, vol . 12 (2002) ,p.2843 [6] K.H.
Online since: July 2011
Authors: Yoshihiro Kuroiwa, Masahiko Kimura, Ichiro Fujii, Kouichi Nakashima, Atsushi Shimamura, Masaki Azuma, Shinichiro Kawada, Satoshi Wada, Nobuhiro Kumada
In order to screen combination of elements for the perovskite structure, the tolerance factor, t=(rA+rO)/(rB+rO), where rA, rB, and rO are a radius of A-site and B-site elements and oxygen and the perovskite structure is stable when t~1, [5] was initially calculated using ionic radii from the Shannon’s table [6].
Objective of this study is to prepare the single phase perovskite structure to see if the dielectric and piezoelectric properties are better than those of the mixed phase.
The crystal structure of the ceramics was measured by XRD.
Results and discussion Crystal structure of BKXN (X=Cu, Mg, Zn) ceramics by various methods.
The patterns suggests that the crystal structure is cubic or pseudo-cubic.
Online since: June 2010
Authors: Feng Wu, Shi Chen, Jing Wang, Dao Bin Mu
Because of the limitation of the Lattice structure (CaCu5-type), the gaseous hydrogen storage capacity of AB5-type alloy is less than 1.4 wt.
The effect of the content of element magnesium on the structure and electrochemical *Corresponding author.
The structure of La2Ni7 phase unit would not keep sustainable.
PuNi3-type unit has more Laves units than A2B7-type unit; it can contain more magnesium atoms and maintain the existence of single-cell structure.
Materials Chemistry and Physics, Vol. 83(2004), p.361