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Online since: August 2008
Authors: S. Khuanphet, Sukon Phanichphant, Pusit Pookmanee
Phanichphant2,3,c
1
Department of Chemistry, Faculty of Science, Maejo University, Chiang Mai, 50290, Thailand
2
Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50290,
Thailand
3
NANOTEC Center of Excellence at Chiang Mai University, Chiang Mai, 50200, Thailand
a
pusit@mju.ac.th, bsupalakk@yahoo.co.th, csphanichphant@yahoo.com
Keywords: Hydrothermal route, ZnO
Abstract.
The phase structure was examined by X-ray diffraction (XRD).
A single phase hexagonal structure was obtained without calcination step.
The single phase hexagonal structure of ZnO microparticle was obtained without calcination compared with JCPDS File Card No. 36-1451 [18].
The single phase hexagonal structure of ZnO microparticle was obtained without calcination step.
The phase structure was examined by X-ray diffraction (XRD).
A single phase hexagonal structure was obtained without calcination step.
The single phase hexagonal structure of ZnO microparticle was obtained without calcination compared with JCPDS File Card No. 36-1451 [18].
The single phase hexagonal structure of ZnO microparticle was obtained without calcination step.
Online since: October 2020
Authors: Lukman Noerochim, Diah Susanti, Eriek Wahyu Restu Widodo, Vuri Ayu Setyowati, Mohammad Yusuf Sulaiman
Graphite has a crystalline structure that is more crystalline than CA and CPC.
The carbon composition dominates the catalyst because of the carbon structure in flake shape.
Fe-Gt, Fe-CA, and Fe-CPC have a block carbon structure.
Nam, A review of polymer–nanocomposite electrolyte membranes for fuel cell application, Journal of Industrial and Engineering Chemistry, 21 (2015) 36-52
Zelenay, Synthesis-structure-performance correlation for polyaniline-Me-C non-precious metal cathode catalysts for oxygen reduction in fuel cells, Journal of Materials Chemistry, 21 (2011) 11392-11405
The carbon composition dominates the catalyst because of the carbon structure in flake shape.
Fe-Gt, Fe-CA, and Fe-CPC have a block carbon structure.
Nam, A review of polymer–nanocomposite electrolyte membranes for fuel cell application, Journal of Industrial and Engineering Chemistry, 21 (2015) 36-52
Zelenay, Synthesis-structure-performance correlation for polyaniline-Me-C non-precious metal cathode catalysts for oxygen reduction in fuel cells, Journal of Materials Chemistry, 21 (2011) 11392-11405
Online since: June 2014
Authors: Marioara Moldovan, Laura Silaghi-Dumitrescu, Aurora Antoniac, Cristina Prejmerean, Loredana Colceriu, Sanda Cimpean, Codruta Nicola, Sorina Sava, Marcela Trif, Tinca Buruiana, Ana-Iulia Blajan
EFFECT ON ADHESION TO TOOTH STRUCTURE FOR SOME EXPERIMENTAL DENTAL ADHESIVE SYSTEM
Loredana Colceriu1a, Sanda Cimpean1b, Codruta Nicola1c, Sorina Sava1d, Marcela Trif2e, Tinca Buruiana3f, Marioara Moldovan2g,
Laura Silaghi-Dumitrescu2h, Aurora Antoniac4i, Ana-Iulia Blajan4j,
Cristina Prejmerean2k
1“Iuliu Hatieganu” University of Medicine and Pharmacy, Faculty of Dentistry, Cluj-Napoca, Romania
2”Babes-Bolyai” University, “Raluca Ripan” Chemistry Research Institute, Cluj-Napoca, Romania
3“Petru Poni”, Institute of Macromolecular Chemistry, Iasi, Romania
4 University Politehnica of Bucharest
aloredana_cc@yahoo.fr
Keywords: dentin, enamel, microleakage, adhesive systems, stereomicroscopy, scanning electron microscopy.
Recently a three steps adhesive system was developed by the Dental Materials Department; “Raluca Ripan” Chemistry Research Institute Cluj-Napoca using an aromatic urethane dimethacrylate BisGMA analogue, respectively triethyleneglicol dimethacrylate (TEGDMA) was used as diluting monomer experimental.
The objectives of this study were to evaluate the microleakage in Class V cavities with margins in enamel and dentin and restored with two adhesives system, and to analyze the adhesion on the tooth structure.
Both, adhesive system and composite resin were manufactured at the Dental Material Department from the “Raluca Ripan” Chemistry Research Institute Cluj-Napoca.
The increased microleakage in gingival areas was due to the lack of enamel structure available in gingival areas compared to occlusal areas.
Recently a three steps adhesive system was developed by the Dental Materials Department; “Raluca Ripan” Chemistry Research Institute Cluj-Napoca using an aromatic urethane dimethacrylate BisGMA analogue, respectively triethyleneglicol dimethacrylate (TEGDMA) was used as diluting monomer experimental.
The objectives of this study were to evaluate the microleakage in Class V cavities with margins in enamel and dentin and restored with two adhesives system, and to analyze the adhesion on the tooth structure.
Both, adhesive system and composite resin were manufactured at the Dental Material Department from the “Raluca Ripan” Chemistry Research Institute Cluj-Napoca.
The increased microleakage in gingival areas was due to the lack of enamel structure available in gingival areas compared to occlusal areas.
The Side-Chain Effects on Photovoltaic Properties of Copolymers Based on Phenothiazine and Thiophene
Online since: January 2013
Authors: Tae Won Ko, Han Sol Yoo, Je Wan Woo, Yong Sung Park, Dae Hee Yun
The structures of synthesized compounds were confirmed by 1H NMR.
All structures of monomers and polymers were verified by 1H-NMR.
Tao: Journal of Polymer Science Part A: Polymer Chemistry, Vol. 47 (2008), p. 137-148 [6] H.
Lin: Journal of Polymer Science: Part A: Polymer Chemistry, Vol. 48 (2010), p. 4823-4834 [7] N.S.
Park: Accepted to Journal of Industrial and Engineering Chemistry, (2012), in press.
All structures of monomers and polymers were verified by 1H-NMR.
Tao: Journal of Polymer Science Part A: Polymer Chemistry, Vol. 47 (2008), p. 137-148 [6] H.
Lin: Journal of Polymer Science: Part A: Polymer Chemistry, Vol. 48 (2010), p. 4823-4834 [7] N.S.
Park: Accepted to Journal of Industrial and Engineering Chemistry, (2012), in press.
Online since: January 2013
Authors: Xiao Li Gou, Huan Chun Wang, Xiao Meng Lv
The surface structure was strongly changed in the process, along with the changes of chemical functional groups.
Introduction Unsymmetric dimethyl hydrazine(UDMH) is a kind of severe toxic chemistry substance with high volatility and permeability, and will cause serious damage to personnel who exposed to it in high concentration in short time or in low concentration regularly, especially through skin and respiratory system.
Recent researches[1-5] indicate that the sorption capacity of activated carbon will be much more improved by modification, according to change of the surface structure (hole distribution)and the increase of surface area.
AC1 after adsorption; c.AC2; d.AC3 Scanning Electron Microscope (SEM) was used to characterize the surface structure.
Both of the physical structure and chemical functional groups(type and amount) were changed in modification process.
Introduction Unsymmetric dimethyl hydrazine(UDMH) is a kind of severe toxic chemistry substance with high volatility and permeability, and will cause serious damage to personnel who exposed to it in high concentration in short time or in low concentration regularly, especially through skin and respiratory system.
Recent researches[1-5] indicate that the sorption capacity of activated carbon will be much more improved by modification, according to change of the surface structure (hole distribution)and the increase of surface area.
AC1 after adsorption; c.AC2; d.AC3 Scanning Electron Microscope (SEM) was used to characterize the surface structure.
Both of the physical structure and chemical functional groups(type and amount) were changed in modification process.
Online since: November 2011
Authors: Shu Chen, Yu Ting Liu, Da Wei Yin
Synthesis and antibacterial activity of several nonvel schiff bases bearing acetylferrocenyl and 2-amino-5-substituted-1,3,4-thiadiazole
Yuting Liu 1, a, Shu Chen 2,b and Dawei Yin 3
1 Key laboratory of Auxiliary Chemistry & technology for Chemical Industry,Ministry of Education, College of Chemistry & Chemical Engineering, Shaanxi University of Science & Technology, Xi’an 710021, People’s Republic of China
2 Key laboratory of Auxiliary Chemistry & technology for Chemical Industry,Ministry of Education, College of Chemistry & Chemical Engineering, Shaanxi University of Science & Technology, Xi’an 710021, People’s Republic of China
3Key laboratory of Auxiliary Chemistry & technology for Chemical Industry,Ministry of Education, College of Chemistry & Chemical Engineering, Shaanxi University of Science & Technology, Xi’an 710021, People’s Republic of China
a lyt@sust.edu.cn, b topchenshu123@163.com
Keywords: Acetylferrocene;thiadiazole;schiff base;Synthesis;Antibacterial activity
A series of novel schiff bases bearing acetylferrocenyl and 2- amino-5-substituted -1,3,4-thiadiazole were synthesized and the structure of them were confirmed by IR, 1H NMR and elementary analysis.The title compounds were evaluated for antibacterial activity against gram positive(Staphylococcus aureus),gram negative bacteria(Escherichia coli), fungi(Yeast) and bacteria(Actinomycete).
Basic and Application of organometallic chemistry.Beijing: Science Press, 1997,425 [7] Gujral,M.
A series of novel schiff bases bearing acetylferrocenyl and 2- amino-5-substituted -1,3,4-thiadiazole were synthesized and the structure of them were confirmed by IR, 1H NMR and elementary analysis.The title compounds were evaluated for antibacterial activity against gram positive(Staphylococcus aureus),gram negative bacteria(Escherichia coli), fungi(Yeast) and bacteria(Actinomycete).
Basic and Application of organometallic chemistry.Beijing: Science Press, 1997,425 [7] Gujral,M.
Online since: June 2008
Authors: António Estevao Candeias, M. Carreira, A. Manhita, C.T. Costa, P.J. Mendes, A.J. Palace Carvalho, J.P. Prates Ramalho
Prates Ramalho
e
Universidade de Evora, Chemistry Department and Évora Chemistry Centre,
R.
Introduction Most natural dyes are fixed by chemical bonds within the structure of the fibres.
Mordants work by forming chemical bonds between the dye molecules and the fibre molecular structure.
Fe(II)-dye complex energies of optimized structures in Hartree.
Hay in: Modern Theoretical Chemistry, edited by H.F.
Introduction Most natural dyes are fixed by chemical bonds within the structure of the fibres.
Mordants work by forming chemical bonds between the dye molecules and the fibre molecular structure.
Fe(II)-dye complex energies of optimized structures in Hartree.
Hay in: Modern Theoretical Chemistry, edited by H.F.
Online since: July 2020
Authors: Prasong Srihanam, Suchai Tanisood
Keratin/Egg White Blend Particles: Preparation and Characterization
Suchai Tanisood1,a and Prasong Srihanam2,b*
1Department of Chemistry, Faculty of Science, Mahasarakham University, Kantharawichai District, Maha Sarakham 44150, Thailand
2The Center of Excellence in Chemistry (PERCH-CIC), Department of Chemistry, Faculty of Science, Mahasarakham University, Kantharawichai District, Maha Sarakham 44150, Thailand
asujai.acetone@gmail.com, bprasong.s@msu.ac.th
Keywords: Particle, keratin, egg white, morphology, thermal property
Abstract.
FTIR spectra indicated that all particles co-existed as α-helix and random coil structures.
These peaks indicated α-helix and random coil structures.
The α-helix and random coil structures were the main structures of all particles.
We also thank the Center of Excellence in Chemistry (PERCH-CIC), Faculty of Science and Mahasarakham University for chemical support.
FTIR spectra indicated that all particles co-existed as α-helix and random coil structures.
These peaks indicated α-helix and random coil structures.
The α-helix and random coil structures were the main structures of all particles.
We also thank the Center of Excellence in Chemistry (PERCH-CIC), Faculty of Science and Mahasarakham University for chemical support.
Online since: July 2012
Authors: Katsumi Kushiya, Hiroki Sugimoto, Yoshiyuki Chiba, Yoshiaki Tanaka, Hideki Hakuma
., 123-1, Shimo-kawairi, Atsugi, 243-0206, Kanagawa, Japan
akatsumi.kushiya@solar-frontier.com
Keyword: Photovoltaic (PV) technology, Thin-film solar cells, CuInSe2-based thin-film PV technology, Characterization techniques
Abstract
In the CuInSe2(CIS)-based thin-film PV technology, various characterization techniques have been applied to measure the composition, crystal structure, depth profile and defect chemistry and so on, since Boeing Aerospace, for the first time, has come to the 10 % milestone in a thin-film form in 1980 by fabricating a very small single cell with top grids.
(ASI) Fig. 2 Basic device structures of CIS-based thin-film PV technology completed mainly by ASI and Boeing.
Table 1 Device structure and manufacturing process being employed by the companies under the commercialization stage.
Characterization of pn hetero-junction CIS-based thin-film PV circuits are basically a stacked structure as shown in Fig. 3 and Table 1.
Such analytical works helped to understand the crystallinity, compositional structure and defects of polycrystalline CIS-based absorbers especially on grain structure, grain boundary, depth profile in the compositional grading, defect chemistry, and so on.
(ASI) Fig. 2 Basic device structures of CIS-based thin-film PV technology completed mainly by ASI and Boeing.
Table 1 Device structure and manufacturing process being employed by the companies under the commercialization stage.
Characterization of pn hetero-junction CIS-based thin-film PV circuits are basically a stacked structure as shown in Fig. 3 and Table 1.
Such analytical works helped to understand the crystallinity, compositional structure and defects of polycrystalline CIS-based absorbers especially on grain structure, grain boundary, depth profile in the compositional grading, defect chemistry, and so on.
Online since: December 2012
Authors: Qing Nan Zhao, Shao Hong Hou, Ying Liu, Wu Zeng, Jie Sun
Comparative Study of Sol-Gel Hydrothermal and Sol-Gel Synthesis of Titania-Silica Composite Nanoparticles[J].Journal of Solid State Chemistry,2005,178(5):1395 -1405
] so that films are hydrophilic[[5] Lafond V, Mutin P H.Control of the Texture of Titania-Silica Mixed Oxides Prepared by Nonhydrolytic Sol-Gel.
Chemistry of Materials,2004,16(25):5380-5386. ].In addition, the addition of surfactant in the sol as a template can improve the formation of nano-porous structure, obtain antireflection function and hydrophilic films which meet demands.
It promoted silicic acid hydrolysis and the formation of three-dimensional network structure of SiO2-CTAB when CTAB increased, porosity and gap size is large.
With the aged time increasing, the network structure gradually became inerratic, the porosity and gap size tends to reduce, so the average spectral transmittance of the film decreased.
Fig. 8 PEG=0.5g/100mL Fig. 9 PEG=1g/100mL Fig. 10 PEG=2g/100mL Fig. 11 PEG=4g/100mL Aged time:1d(x100k) Aged time:1d(x100k) Aged time:1d(x100k) Aged time:1d(x100k) From Fig. 8~11,the films microstructure with different PEG addition also have no significant differences, suggesting that pretreatment prior to heat treatment annealing process, to avoid cracks, at the same time, make the film structure is even and dense, it is good for uniform distribution of the nanoporous, and the film's flat and smooth surface structure.
Chemistry of Materials,2004,16(25):5380-5386. ].In addition, the addition of surfactant in the sol as a template can improve the formation of nano-porous structure, obtain antireflection function and hydrophilic films which meet demands.
It promoted silicic acid hydrolysis and the formation of three-dimensional network structure of SiO2-CTAB when CTAB increased, porosity and gap size is large.
With the aged time increasing, the network structure gradually became inerratic, the porosity and gap size tends to reduce, so the average spectral transmittance of the film decreased.
Fig. 8 PEG=0.5g/100mL Fig. 9 PEG=1g/100mL Fig. 10 PEG=2g/100mL Fig. 11 PEG=4g/100mL Aged time:1d(x100k) Aged time:1d(x100k) Aged time:1d(x100k) Aged time:1d(x100k) From Fig. 8~11,the films microstructure with different PEG addition also have no significant differences, suggesting that pretreatment prior to heat treatment annealing process, to avoid cracks, at the same time, make the film structure is even and dense, it is good for uniform distribution of the nanoporous, and the film's flat and smooth surface structure.