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Online since: April 2005
Authors: Bo Xie, Anthony J. Muscat
The FTIR results showed that all chemistries reacted with silanol groups on the surface of
the pores producing covalent Si-O-Si bonds.
Direct contact between a sample and the chemistry occurred only when the reactor was filled with liquid CO ClCHSiCH 23 723 )()( ClCHSi 23 9 )() ClCHSi 23 17 )() CHCH 23( CHCH 23( 2.
The CH2 asymmetric stretching peak appeared with BDMCS treatment, and this peak was the largest after ODDMCS treatment as expected based on the structure of these molecules.
These results show that monochlorosilanes are good film repair molecules and because of their size and shape may be good pore capping chemistries.
ODMCS, DDMCS, and ODDMCS are potential sealing chemistries for mesoporous p-MSQ since the alkyl chain length is on the order of 1-3 nm.
Direct contact between a sample and the chemistry occurred only when the reactor was filled with liquid CO ClCHSiCH 23 723 )()( ClCHSi 23 9 )() ClCHSi 23 17 )() CHCH 23( CHCH 23( 2.
The CH2 asymmetric stretching peak appeared with BDMCS treatment, and this peak was the largest after ODDMCS treatment as expected based on the structure of these molecules.
These results show that monochlorosilanes are good film repair molecules and because of their size and shape may be good pore capping chemistries.
ODMCS, DDMCS, and ODDMCS are potential sealing chemistries for mesoporous p-MSQ since the alkyl chain length is on the order of 1-3 nm.
Online since: April 2012
Authors: Suchada Chantrapromma, T. Kobkeatthawin, K. Chanawanno, N. Saewan, P. Wisitsak, T. Suwunwong
Chantrapromma1,2,f
1Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Songkhla 90112, Thailand
2Crystal Materials Research Unit, Department of Chemistry, Faculty of Science, Prince of Songkla University, Songkhla 90112, Thailand
3School of Cosmetic Science, Mae Fah Luang University, Chiang Rai 57100, Thailand
4Excellence Center, Mae Fah Luang University, Chiang Rai 57100, Thailand
athitipone-s@hotmail.com, bkul_atom@hotmail.com, cikullapa@hotmail.com, dnisakorn@mfu.ac.th, epp_biot@hotmail.com, fsuchada.c@psu.ac.th
Keywords: Chalcones, Pyrazoles, Tyrosinase inhibition, Kojic acid, Resveratrol
Abstract.
Their structures were determined on the basis of spectroscopic data interpretation and their tyrosinase inhibitory activity was determined.
Their structures were determined on the basis of IR and 1H NMR spectroscopic data. 1: R1 = 4-bromophenyl, R2 = 4-dimethylaminophenyl 2: R1 = 4-aminophenyl, R2 = 2,4,6-trimethoxyphenyl 3: R1 = 2-furyl, R2 = 2,4,6-trimethoxyphenyl Fig. 1.
Their structures were determined on the basis of spectroscopic data interpretation and corresponded with the proposed structures.
Acknowledgements TS thanks the Center of Excellence for Innovation in Chemistry (PERCH-CIC), Commission on Higher Education, Ministry of Education for a study grant.
Their structures were determined on the basis of spectroscopic data interpretation and their tyrosinase inhibitory activity was determined.
Their structures were determined on the basis of IR and 1H NMR spectroscopic data. 1: R1 = 4-bromophenyl, R2 = 4-dimethylaminophenyl 2: R1 = 4-aminophenyl, R2 = 2,4,6-trimethoxyphenyl 3: R1 = 2-furyl, R2 = 2,4,6-trimethoxyphenyl Fig. 1.
Their structures were determined on the basis of spectroscopic data interpretation and corresponded with the proposed structures.
Acknowledgements TS thanks the Center of Excellence for Innovation in Chemistry (PERCH-CIC), Commission on Higher Education, Ministry of Education for a study grant.
Online since: October 2014
Authors: Marin Bica, Marius Sorin Sofronie, Corina Cernaianu
Energy characteristics of coal depends on the age of their formation (geological age) and the transformations undergone by organic matter under the influence of geological chemistry (chemical age).
Temperatures at the start of volatiles release from solid fuels Fuel Temperature [oC] Wood Peat Lignite Coal Anthracite Bituminous shale 100 100…110 130…170 170…390 380…400 250 In this paper we present the TG, DTG and DSC curves measured experimentally in the laboratories of the Faculty of Mechanics and Faculty of Chemistry from Craiova and in the laboratories of the thermal power plants from Turceni and Craiova.
The determination of important characteristics of solid fuels In order to measure the specific properties of solid fuels combustion, different temperatures of volatilization and changes in fuel structure the thermo gravimetric analysis is used.
There were obtained derivatograms for oak and beech wood using the Perkin Elmer derivatograph from the laboratory of the Faculty of Chemistry from the University of Craiova, and derivatograms for lignite from Rovinari, using a MOM derivatograph from the Chemical Plant of Craiova.
Hemicellulose has a similar structure as cellulose, based on the pentose.
Temperatures at the start of volatiles release from solid fuels Fuel Temperature [oC] Wood Peat Lignite Coal Anthracite Bituminous shale 100 100…110 130…170 170…390 380…400 250 In this paper we present the TG, DTG and DSC curves measured experimentally in the laboratories of the Faculty of Mechanics and Faculty of Chemistry from Craiova and in the laboratories of the thermal power plants from Turceni and Craiova.
The determination of important characteristics of solid fuels In order to measure the specific properties of solid fuels combustion, different temperatures of volatilization and changes in fuel structure the thermo gravimetric analysis is used.
There were obtained derivatograms for oak and beech wood using the Perkin Elmer derivatograph from the laboratory of the Faculty of Chemistry from the University of Craiova, and derivatograms for lignite from Rovinari, using a MOM derivatograph from the Chemical Plant of Craiova.
Hemicellulose has a similar structure as cellulose, based on the pentose.
Online since: April 2023
Authors: B.K. Barakhtin, S.N. Perevislov, A.S. Zhukov, V.V. Madin, P.A. Kuznetcov
Study of the Structure and the Destruction Surface of the Dampers Manufactured by the Selective Laser Melting
A.S.
Petersburg, 190121, Russian Federation 4Institute of Silicate Chemistry of Russian Academy of Sciences, 2 Makarova emb., St.
Table 1 shows the chemical composition of the powder defined by the "wet chemistry" method on several samples.
The metal structure after SLM should be considered as an inhomogeneous structure formed depending on the manufacturing parameters.
Qiu et al., Influence of processing conditions on strut structure and compressive properties of cellular lattice structures fabricated by selective laser melting, Materials Science & Engineering.
Petersburg, 190121, Russian Federation 4Institute of Silicate Chemistry of Russian Academy of Sciences, 2 Makarova emb., St.
Table 1 shows the chemical composition of the powder defined by the "wet chemistry" method on several samples.
The metal structure after SLM should be considered as an inhomogeneous structure formed depending on the manufacturing parameters.
Qiu et al., Influence of processing conditions on strut structure and compressive properties of cellular lattice structures fabricated by selective laser melting, Materials Science & Engineering.
Online since: February 2021
Authors: Quoc Toan Le, Efrain Altamirano-Sanchez, E. Kesters, M. Doms
Effect of Surface Chemistry on Ruthenium Wet Etching
Q.T.
In addition, to mimic the process carried out on a damascene structure, a short CMP process was also applied on the as-deposited and annealed Ru films.
The CMP was performed to mimic the process applied for a typical single damascene Ru structure, but only for 10 s.
XPS measurements were carried out to have further insight into the surface chemistry of the Ru layers.
Kelly et al., Experimental Study of Nanoscale Co damascene BEOL Interconnect Structures, IEEE International Interconnect Technology Conference/Advanced Metallization Conference – IITC/AMC (2016) 40-42
In addition, to mimic the process carried out on a damascene structure, a short CMP process was also applied on the as-deposited and annealed Ru films.
The CMP was performed to mimic the process applied for a typical single damascene Ru structure, but only for 10 s.
XPS measurements were carried out to have further insight into the surface chemistry of the Ru layers.
Kelly et al., Experimental Study of Nanoscale Co damascene BEOL Interconnect Structures, IEEE International Interconnect Technology Conference/Advanced Metallization Conference – IITC/AMC (2016) 40-42
Online since: August 2019
Authors: Sulaiman Shukri, Isao Watanabe, Wan Nurfadhilah Zaharim, Harison Rozak, Siti Nuramira Abu Bakar, Nur Eliana Ismail
Guanine nitrogenous bases structure and numbering. a) guanine nucleobase and b) guanine nucleotide.
Valence electron is important for chemical structure, properties, reactivity and it participates in most bonding.
The difference in Fermi contact value should be expected due to the different geometrical structure of the two systems.
[2] Chakraborty, T., Charge migration in DNA: perspectives from physics, chemistry, and biology, Heidelberg, New York, 2007
[30] Coulson, C., Valence Angles in Group II Dihalide Molecules, Israel Journal of Chemistry, 11(5) (1973) 683-690.
Valence electron is important for chemical structure, properties, reactivity and it participates in most bonding.
The difference in Fermi contact value should be expected due to the different geometrical structure of the two systems.
[2] Chakraborty, T., Charge migration in DNA: perspectives from physics, chemistry, and biology, Heidelberg, New York, 2007
[30] Coulson, C., Valence Angles in Group II Dihalide Molecules, Israel Journal of Chemistry, 11(5) (1973) 683-690.
Online since: September 2017
Authors: Nikolai Shapkin, L.B. Leontiev, V.N. Makarov
Such a structure is characteristic of metal-ceramic and organic-metal-ceramic films.
Polyphenylsiloxane (PPS) has stable chemical composition [C6H5SiO1,5]n and layered structure.
Roux, A new Al-Mg-Organoclay, New Journal of Chemistry, 26 (2002) 1597-1600
Razov, Investigation of structure of modofied vermiculites by various physical and chemical methods, J.
Khalchenko, Interation of polyphenylsiloxane, Russian Journal of General Chemistry, 6(85) (2015) 1487-1490
Polyphenylsiloxane (PPS) has stable chemical composition [C6H5SiO1,5]n and layered structure.
Roux, A new Al-Mg-Organoclay, New Journal of Chemistry, 26 (2002) 1597-1600
Razov, Investigation of structure of modofied vermiculites by various physical and chemical methods, J.
Khalchenko, Interation of polyphenylsiloxane, Russian Journal of General Chemistry, 6(85) (2015) 1487-1490
Online since: September 2013
Authors: Xi Cheng, Qing Wang, Ya Hui Zhang
Among them, hydrothermal or solvethermal method is regarded as a very effective and potential soft-chemistry route to tune the architectures of admium sulfide and cadmium selenides[5-8].
The lengths of the nanoribbons or QBs will depend on the lateral size of the template structures (specifically, the lateral sheet size in Figure 4).
Sarma, The Journal of Physical Chemistry Letters Vol. 1 (2009), p. 304 [2] L.
Gupta, The Journal of Physical Chemistry C Vol. 114 (2010), p. 2551 [4] X.
Gao, The Journal of Physical Chemistry C Vol. 113 (2009), p. 10981 [5] F.
The lengths of the nanoribbons or QBs will depend on the lateral size of the template structures (specifically, the lateral sheet size in Figure 4).
Sarma, The Journal of Physical Chemistry Letters Vol. 1 (2009), p. 304 [2] L.
Gupta, The Journal of Physical Chemistry C Vol. 114 (2010), p. 2551 [4] X.
Gao, The Journal of Physical Chemistry C Vol. 113 (2009), p. 10981 [5] F.
Online since: December 2013
Authors: Kai Qi Ye, Hui Juan Yue, Hai Xing Liu, Lin Tong Wang, Yan Fu Huan, Qing Liu, Yu Juan Dong
China
2College of Chemistry, State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, P.R.
China 3College of Chemistry, State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, P.R.
ZR2010BL025), Open Project of State Key Laboratory of Supramolecular Structure and Materials (No. sklssm201323)(Jilin University), State Key Laboratory of Inorganic Synthesis and Preparative Chemistry (No. 2011-13)(Jilin University).
Wang, et al.: Chinese J. of Chemistry,2001, Vol. 19 (2001) No.7, p.675
Wang, et al.: Analytical Chemistry, Vol. 30 (2002) No.1, p.125.
China 3College of Chemistry, State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, P.R.
ZR2010BL025), Open Project of State Key Laboratory of Supramolecular Structure and Materials (No. sklssm201323)(Jilin University), State Key Laboratory of Inorganic Synthesis and Preparative Chemistry (No. 2011-13)(Jilin University).
Wang, et al.: Chinese J. of Chemistry,2001, Vol. 19 (2001) No.7, p.675
Wang, et al.: Analytical Chemistry, Vol. 30 (2002) No.1, p.125.
Online since: October 2020
Authors: Xiao Yu Jiang, Shuai Li, Zhi Gang Zhang, Xin Yuan Chen
XRD results reveal that the RuO2 and RuO2-LaFeO3 samples are mainly a rutile structure.
It reveals that the rutile structure of RuO2 can still be stabilized when introducing LaFeO3 doping.
XRD study reveals that the RuO2 and RuO2-LaFeO3 samples are mainly a rutile structure.
Knipper et al., Synthesis, Structure, and Electrochemical Stability of Ir-Decorated RuO2 Nanoparticles and Pt Nanorods as Oxygen Catalysts, The Journal of Physical Chemistry C. 120 (2016) 1137-1146
Franc et al., Zn-Doped RuO2 electrocatalyts for Selective Oxygen Evolution: Relationship between Local Structure and Electrocatalytic Behavior in Chloride Containing Media, Chemistry of Materials. 23 (2011) 200-207
It reveals that the rutile structure of RuO2 can still be stabilized when introducing LaFeO3 doping.
XRD study reveals that the RuO2 and RuO2-LaFeO3 samples are mainly a rutile structure.
Knipper et al., Synthesis, Structure, and Electrochemical Stability of Ir-Decorated RuO2 Nanoparticles and Pt Nanorods as Oxygen Catalysts, The Journal of Physical Chemistry C. 120 (2016) 1137-1146
Franc et al., Zn-Doped RuO2 electrocatalyts for Selective Oxygen Evolution: Relationship between Local Structure and Electrocatalytic Behavior in Chloride Containing Media, Chemistry of Materials. 23 (2011) 200-207