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Online since: June 2010
Authors: S.M. Hussain, Hafiz-ur-Rehman Hafiz-ur-Rehman, T. Abbas, A. Quddos
Polymers can be stretched and oriented to afford a particular structure and arrangement of the
particles.
these materials, such as structure-property relationships led to emerging research in this area.
The mechanism of important aspects of the chemistry indicates the formation of these uniformity, phase continuity, domain sizes and the molecular boundaries, which all have a direct influence on physical and mechanical properties systems in the submicron range (up to a few hundreds of nanometers) matrix resulting the best properties of such reader is referred to the literature cited for a more detailed description.
Frisch, Polyurethane chemistry and technology, Vol. 54, Part II, Wiley, New York, 54 p (1964)
these materials, such as structure-property relationships led to emerging research in this area.
The mechanism of important aspects of the chemistry indicates the formation of these uniformity, phase continuity, domain sizes and the molecular boundaries, which all have a direct influence on physical and mechanical properties systems in the submicron range (up to a few hundreds of nanometers) matrix resulting the best properties of such reader is referred to the literature cited for a more detailed description.
Frisch, Polyurethane chemistry and technology, Vol. 54, Part II, Wiley, New York, 54 p (1964)
Online since: June 2014
Authors: Kannaiyan Pandian, Selvaraj Devi
Pandian*
Department of Inorganic Chemistry, University of Madras, Guindy Campus, Chennai-600 025 Email: jeevapandian@yahoo.co.uk
Key words: NiHCF, titanium oxide nanotube, paracetamol, caffeine, chitosan
Abstract
The nickel hexacyanoferrate decorated titanium oxide nanotube (NiHCF@TNT) was prepared by ion exchange method by mixing of nickel ion modified titanium oxide nanotube with a known amount of potassium ferricyanide under stirring over a period of 5 h.
The peaks at the 2Ɵ values of 15.4°, 17.3°, 26.6°, 28.4°, 35.2°, 40.3°, 43.7°, 50.7°, 53.7° and 57.1° are corresponds to the crystal planes of (111), (200), (220), (311), (400), (420), (422), (440), (600) and (620) which indicates the face centered cubic structure of NiHCF(JCPDS 53-0084).
The peaks at the 2Ɵ values of 11.3°, 24.5° and 48.0° are corresponds to the crystal planes of (020), (110) and (200) which suggests the crystalline structure of lepidocrocite-type TNT.
Pandian, Hexacyanoferrate-Decorated Titania Nanotube: CoHCF@TNT Modified GCE as an Electron Transfer Mediator for the Determination of Hydrazine in Water Samples, ISRN Analytical Chemistry, 2012 (2012) 8 pages
The peaks at the 2Ɵ values of 15.4°, 17.3°, 26.6°, 28.4°, 35.2°, 40.3°, 43.7°, 50.7°, 53.7° and 57.1° are corresponds to the crystal planes of (111), (200), (220), (311), (400), (420), (422), (440), (600) and (620) which indicates the face centered cubic structure of NiHCF(JCPDS 53-0084).
The peaks at the 2Ɵ values of 11.3°, 24.5° and 48.0° are corresponds to the crystal planes of (020), (110) and (200) which suggests the crystalline structure of lepidocrocite-type TNT.
Pandian, Hexacyanoferrate-Decorated Titania Nanotube: CoHCF@TNT Modified GCE as an Electron Transfer Mediator for the Determination of Hydrazine in Water Samples, ISRN Analytical Chemistry, 2012 (2012) 8 pages
Online since: May 2013
Authors: Rattanabhorn Junthip, Doungporn Amornlerdpison, Thitiphan Chimsook
Rattanabhorn Junthip1, a, Doungporn Amornlerdpison2, b
and Thitiphan Chimsook1, c
1Department of Chemistry, Faculty of Science, Maejo University, Chiang Mai, Thailand
2Faculty of Fisheries Technology and Aquatic Resources, Maejo University, Chiang Mai, Thailand
anoiplant@yahoo.com, bdoung_fishtech@hotmail.com, cthitiphan.cs@gmail.com
Keywords: Antioxidant activity, Phenolic content, Phytochemical screening, Spirogyra spp.
Marine algae are a rich source of bioactive substances with novel structures and significant activity.
Further studies have to be carried out to isolate, characterize and elucidate the structure of the bioactive compounds from Spirogyra spp. extract for the industrial drug formulation.
Acknowledgement We are thankful to The Thailand Research Fund, National Research Council of Thailand, Department of Chemistry, Faculty of Science, Maejo University and Faculty of Fisheries Technology and Aquatic Resources, Maejo University for financial support and providing all necessary facilities to conduct the experiments.
Marine algae are a rich source of bioactive substances with novel structures and significant activity.
Further studies have to be carried out to isolate, characterize and elucidate the structure of the bioactive compounds from Spirogyra spp. extract for the industrial drug formulation.
Acknowledgement We are thankful to The Thailand Research Fund, National Research Council of Thailand, Department of Chemistry, Faculty of Science, Maejo University and Faculty of Fisheries Technology and Aquatic Resources, Maejo University for financial support and providing all necessary facilities to conduct the experiments.
Online since: September 2018
Authors: Ludmila A. Zemnukhova, Sergey L. Sinebryukhov, Sergey V. Gnedenkov, Alexander A. Sokolov, Alexander N. Minaev, Denis P. Opra
Sinebryukhov1,f
1Institute of Chemistry FEB RAS, 159 Pr. 100-letiya Vladivostoka, Vladivostok, 690022, Russia
2Far Eastern Federal University, 8 Sukhanova St., Vladivostok, 690950, Russia
asvg21@hotmail.com, blaz@ich.dvo.ru, cdp.opra@gmail.com, d,*alexsokol90@mail.ru, eaminaev@mail.ru, fsls@ich.dvo.ru
Keywords: lithium battery, Klason lignin, alkaline lignin, organic electrode.
The crystal structure was characterized by X-ray diffraction (XRD) on Bruker D8-Advance (Germany) diffarctometer with CuKα-radiation.
Schyogolev, Chemistry of Wood and Cellulose (in Russian), Moscow: Forest Industry, 1978, p. 368
Xu, Study on structure and thermal stability properties of lignin during thermostabilization and carbonization, Int.
The crystal structure was characterized by X-ray diffraction (XRD) on Bruker D8-Advance (Germany) diffarctometer with CuKα-radiation.
Schyogolev, Chemistry of Wood and Cellulose (in Russian), Moscow: Forest Industry, 1978, p. 368
Xu, Study on structure and thermal stability properties of lignin during thermostabilization and carbonization, Int.
Online since: October 2006
Authors: Kurosch Rezwan, Ludwig J. Gauckler
A change of protein structure would
hamper the cell receptors situated within the cell membrane to recognize the specific protein
function (see Figure 1).
Structure files were taken from the protein data bank [46].
Caruso: Analytical-chemistry Vol. 73 (2001), p. 4212-4217 [14] K.
Gauckler: Journal of Physical Chemistry B Vol. 109 (2005), p. 14469 -14474 [46] RCSB Protein Data Bank, www.rcsb.org/pdb/, Access: January (2006) [47] W.
Carter, Ho, J.X.: Advances in Protein Chemistry Vol. 45 (1994), p. 153-203 [49] C.
Structure files were taken from the protein data bank [46].
Caruso: Analytical-chemistry Vol. 73 (2001), p. 4212-4217 [14] K.
Gauckler: Journal of Physical Chemistry B Vol. 109 (2005), p. 14469 -14474 [46] RCSB Protein Data Bank, www.rcsb.org/pdb/, Access: January (2006) [47] W.
Carter, Ho, J.X.: Advances in Protein Chemistry Vol. 45 (1994), p. 153-203 [49] C.
Online since: August 2016
Authors: Ahmed Abd El-Moneim, Engy Ghoniem
Flexible Interdigital in-plane Supercapacitor Based on Laser Reduced Graphene Oxide (LRGO)
Engy Nagy Ghoniem1, a *, Ahmed Abd El-Moniem1, 2, b
1 Material Science and Engineering Department, Egypt-Japan University of Science and Technology, New Borg El Arab, Alexandria 21934, Egypt
2 On leave from Physical Chemistry Department, National Research Centre, Cairo, Egypt
aingy.ghoniem@ejust.edu.eg, bahmed.abdelmoneim@ejust.edu.eg
Keywords: LRGO, Universal laser printing machine, Conventional structure supercapacitor, Interdigital in-plane supercapacitor
Abstract.
We compared the interdigitated in-plan structure with the conventionally stacked structure supercapacitor.
Furthermore, the LRGO film shows a 3D porous and continuous structure of overlapped LRGO sheets, Fig. 3(b).
Noticeably from Fig.4 (b) that the interdigitated structure shows higher capacitance as opposed to the conventional sandwich structure.
This means that our interdigital in-plane structure shows an increase in the capacitance value that reaches 18 fold vs. the value obtained for conventional structure.
We compared the interdigitated in-plan structure with the conventionally stacked structure supercapacitor.
Furthermore, the LRGO film shows a 3D porous and continuous structure of overlapped LRGO sheets, Fig. 3(b).
Noticeably from Fig.4 (b) that the interdigitated structure shows higher capacitance as opposed to the conventional sandwich structure.
This means that our interdigital in-plane structure shows an increase in the capacitance value that reaches 18 fold vs. the value obtained for conventional structure.
Online since: July 2012
Authors: Qian-Feng Zhang, Xiang Hong Huang, Jun Qiao
China
2 Institute of Molecular Engineering and Applied Chemistry, School of Materials Science and Engineering, Anhui University of Technology, Ma’anshan, Anhui 243002, P.
X-ray diffraction (XRD) results reveal that the main crystal structure of the SFC powders is cubic structure SrFe0.5Co0.5O3.
The mixture thus becomes porous structure [19].
No any net-like structures are formed showing the dense structures of the SFC samples.
The exothermic peak corresponds to the phase transition from the perovskite structure to the brownmillerite structure [20].
X-ray diffraction (XRD) results reveal that the main crystal structure of the SFC powders is cubic structure SrFe0.5Co0.5O3.
The mixture thus becomes porous structure [19].
No any net-like structures are formed showing the dense structures of the SFC samples.
The exothermic peak corresponds to the phase transition from the perovskite structure to the brownmillerite structure [20].
Online since: January 2006
Authors: Nai Qian Feng, Xian Fu Han, Lai-Jun Lu, Chong Zhi Li
PCs are
copolymers which chemical structures have potential to be modified through the molecular design
of high performance water-reducer [4].
Because it is very difficult to estimate the actual structures, one of the possible chemical structures was shown in Fig. 1.
Table 1 Monomer's molar ratio of MPCs Groups' kind -SO3- PEO chain -COO - -COOR Chemical structure C4H7 S O3Na C7H13N O4S C3H4O2 C4H2O3 C6H9O3 Abbrev.
Kreppelta, M.Weibelb, D.Zampinib, M.Romera: Influence of solution chemistry on the hydration of polished clinker surfaces-a study of different types of polycarboxylic acid-based admixtures, Cement and Concrete Research, 32 (2002), pp. 187-198
[4] K.Yamada, T.Takahashi, S.Hanehara,M.Matsuhisa: Effects of the chemical structure on the properties of polycarboxylate-type water-reducer, Cement and Concrete Research, 30(2000), pp.197-207
Because it is very difficult to estimate the actual structures, one of the possible chemical structures was shown in Fig. 1.
Table 1 Monomer's molar ratio of MPCs Groups' kind -SO3- PEO chain -COO - -COOR Chemical structure C4H7 S O3Na C7H13N O4S C3H4O2 C4H2O3 C6H9O3 Abbrev.
Kreppelta, M.Weibelb, D.Zampinib, M.Romera: Influence of solution chemistry on the hydration of polished clinker surfaces-a study of different types of polycarboxylic acid-based admixtures, Cement and Concrete Research, 32 (2002), pp. 187-198
[4] K.Yamada, T.Takahashi, S.Hanehara,M.Matsuhisa: Effects of the chemical structure on the properties of polycarboxylate-type water-reducer, Cement and Concrete Research, 30(2000), pp.197-207
Online since: January 2013
Authors: De Jun Li, Wei Ren, Lei Dong, Lei Dong
The image revealed that most of the graphite oxide has been effectively exfoliated to ultrathin sheets with wavy structures.
This structure suggests that the intrinsic ripples of graphene might develop into wavy structures in the macroscopic scale.
In respect of the graphene, one may consider that it could be easy to form a porous structure in the macroscopic scale due to the curled and wrinkled graphene sheets stacked structure [7].
Fig 3(b) demonstrated the two-dimensional ultrathin flexible structure of graphene.
Dahn, Lithium Insertion in Hydrogen-Containing Carbonaceous Materials, Chemistry of Material. 8 (1996) 389-393 [10] L.
This structure suggests that the intrinsic ripples of graphene might develop into wavy structures in the macroscopic scale.
In respect of the graphene, one may consider that it could be easy to form a porous structure in the macroscopic scale due to the curled and wrinkled graphene sheets stacked structure [7].
Fig 3(b) demonstrated the two-dimensional ultrathin flexible structure of graphene.
Dahn, Lithium Insertion in Hydrogen-Containing Carbonaceous Materials, Chemistry of Material. 8 (1996) 389-393 [10] L.
Online since: June 2014
Authors: Tayebeh Gheiratmand, Saeed Mohammadi Siyani, Hamid Reza Madaah Hosseini, Parviz Davami
The higher value of coercivity in mechanically alloyed samples is attributed to strains induce to the structure during milling and the lack of amorphous phase and exchange interaction between nano grains.
The main technique for producing Finemet alloys is melt spinning followed by vacuum annealing to produce nanocrystalline structure with an amorphous intergranular phase.
Manivel et al. [4] exhibited that after 60 hr of milling the Fe(Si) phase develops in the structure while Aleg et al. [7] demonstrated the formation of both Fe(Si,B) and Fe2B phases after 150 hr of milling.
Journal of Physics and Chemistry of Solids 2013;74:550
The main technique for producing Finemet alloys is melt spinning followed by vacuum annealing to produce nanocrystalline structure with an amorphous intergranular phase.
Manivel et al. [4] exhibited that after 60 hr of milling the Fe(Si) phase develops in the structure while Aleg et al. [7] demonstrated the formation of both Fe(Si,B) and Fe2B phases after 150 hr of milling.
Journal of Physics and Chemistry of Solids 2013;74:550