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Online since: January 2005
Authors: Yeong Keong Ha, Jong Goo Kim, Yeong Jae Park, Won Ho Kim
Journal Citation (to be inserted by the publisher)
Copyright by Trans Tech Publications
Effect of a tetravalent dopant, Th
4+ on the oxidation of uranium dioxide
Yeong-Keong Ha
1, Jong-Goo Kim
2, Yeong-Jae Park3 and Won-Ho Kim
4
Nuclear chemistry research division, KAERI, P.O.
Fig. 1 shows that the lattice parameter increased almost linearly with an increase of the Th content, indicating that the prepared samples were a solid solution in the given range of the Th content and their structure remained as a fluorite structure of UO2[7].
West: "Basic solid state chemistry" JOHN WILEY & SONS (1991), p. 253
Fig. 1 shows that the lattice parameter increased almost linearly with an increase of the Th content, indicating that the prepared samples were a solid solution in the given range of the Th content and their structure remained as a fluorite structure of UO2[7].
West: "Basic solid state chemistry" JOHN WILEY & SONS (1991), p. 253
Vibrationally Averaged Potential Energy Surfaces and Microwave Spectra for Isotopic Ne-CO2 Complexes
Online since: October 2014
Authors: Xiao Ling Luo, Rong Chen
Vibrationally averaged potential energy surfaces and microwave spectra for isotopic Ne–CO2 complexes
Rong Chen1, a, Xiaoling Luo1,b
1College of Chemistry, Chongqing Normal University, Chongqing 401331, China
arongchenscu@163.com, b472601539@qq.com
Keywords: Ne–CO2; isotopic; Average potential energy surface; rovibrational energy levels; Microwave spectra.
The vdW complexes involving CO2 is of special interesting because CO2, as one of the most important absorbers of infrared radiation in the earth’s atmosphere and interstellar chemistry, can cause greenhouse effects.
The Ar–CO2 complex was at first studied by Steed et al. from the microwave spectroscopy [1], and those results showed that the complex has a T-shaped structure.
Subsequently, further experimental studies of microwave [3] and near-infrared [4] spectra of Ne–, Ar–, Kr–CO2 were carried out, from which these complexes are all T-shaped structures similar to Ar–CO2.
The vdW complexes involving CO2 is of special interesting because CO2, as one of the most important absorbers of infrared radiation in the earth’s atmosphere and interstellar chemistry, can cause greenhouse effects.
The Ar–CO2 complex was at first studied by Steed et al. from the microwave spectroscopy [1], and those results showed that the complex has a T-shaped structure.
Subsequently, further experimental studies of microwave [3] and near-infrared [4] spectra of Ne–, Ar–, Kr–CO2 were carried out, from which these complexes are all T-shaped structures similar to Ar–CO2.
Online since: April 2016
Authors: Lukáš Kalina, Miroslava Hajdúchová, Markéta Langová, Vojtěch Enev
Possibilities of using plasticizers in alkali-activated systems
Lukáš Kalina1,a, Miroslava Hajdúchová1,b, Markéta Langová1,c, Vojtěch Enev1,d
1 Brno University of Technology, Faculty of Chemistry, Materials Research Centre
Purkyňova 118, 612 00 Brno, Czech Republic
akalina@fch.vutbr.cz, bxchajduchova@fch.vutbr.cz, cxclangovam@fch.vutbr.cz, dxcenev@fch.vutbr.cz
Keywords: alkali activation, blast furnace slag, lignosulphonate plasticizer
Abstract.
These spectra show that the chemical structure was not modified when the plasticizer was kept in a Na-WG solution.
The results from FTIR show that the stability of LS plasticizer in high alkali environment is very good because the admixture structure was not altered.
Hewlett, Lea´s Chemistry of cement and concrete, Butterworth-Heinemann, Oxford, 2004, ISBN-978-0-7506-6256-7
These spectra show that the chemical structure was not modified when the plasticizer was kept in a Na-WG solution.
The results from FTIR show that the stability of LS plasticizer in high alkali environment is very good because the admixture structure was not altered.
Hewlett, Lea´s Chemistry of cement and concrete, Butterworth-Heinemann, Oxford, 2004, ISBN-978-0-7506-6256-7
Online since: August 2019
Authors: P.N. Mary Lissy, G. Madhu, Roy M. Thomas
XRD analysis is an analytical technique used for phase identification of a crystalline structure as shown in Fig1.
The pattern indicates the crystal structure of PPY/Al2O3-Fe2O3 Nanocomposite.
,“The role of nanomaterials as effective adsorbents and their applications in wastewater treatment” Journal of Nanostructure in Chemistry, March 2017, Volume 7, Issue 1, pp 1–14.
[4] Chahrazed Boukhalfa et.al,“Removal of Copper from Aqueous Solutions by Coprecipitation with Hydrated Iron Oxide”, Asian Journal of Chemistry Vol. 19, No. 6 (2007), 4267-4276
The pattern indicates the crystal structure of PPY/Al2O3-Fe2O3 Nanocomposite.
,“The role of nanomaterials as effective adsorbents and their applications in wastewater treatment” Journal of Nanostructure in Chemistry, March 2017, Volume 7, Issue 1, pp 1–14.
[4] Chahrazed Boukhalfa et.al,“Removal of Copper from Aqueous Solutions by Coprecipitation with Hydrated Iron Oxide”, Asian Journal of Chemistry Vol. 19, No. 6 (2007), 4267-4276
Online since: September 2013
Authors: Zhi Jun Xin, Jian Ping Liang, Xue Hu Li, Xi Hong Lu, Zhong Jia, Dian He, Jing Wu, Lei Tao
Efficient Synthesis of N-(pyridin-4-yl) salicylamide derivatives
Zhong Jia1, 2, Dian He3, Jianping Liang4, Jing Wu5, Lei Tao4, Xuehu Li4,
Xihong Lu4 and Zhijun Xin4*
1Department of Pharmacy, Pulmonary Hospital of Lanzhou, Lanzhou city china medicine hospital, Lanzhou 730046, People’s Republic of China
2College of Veterinary Medicine, Gansu Agricultural University, Lanzhou 73070, People’s Republic of China
3Institute of Medicinal Chemistry, School of Pharmacy, Lanzhou University, Lanzhou 73000, People’s Republic of China
4Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China
5Lanzhou Hospital of traditional Chinese Medicine, Lanzhou 730050, People’s Republic of China
*xinzhj@impcas.ac.cn
Keywords: N-(pyridin-4-yl) salicylamides; Synthesis
Abstract.
Chemistry The synthetic route of N-(pyridin-4-yl) salicylamides was depicted in Fig. 1.
With respecting to the activities against M. tuberculosis (TB), there are two additional major aspects considered: innate resistance, the unique structure and composition of the highly hydrophobic cell wall that must be traversed.
Our studies of structure-activity relationship suggests that the introduction of substitutes with some balance between hydrophobicity and electron effects in position 1 of the heterocycle, or in position 3 or 4 of the salicylic moiety, may greatly affect the antimycobacterial activity, which will contribute to the discovery of a series of prospective wide-spectrum antimycobacterial substances.
Chemistry The synthetic route of N-(pyridin-4-yl) salicylamides was depicted in Fig. 1.
With respecting to the activities against M. tuberculosis (TB), there are two additional major aspects considered: innate resistance, the unique structure and composition of the highly hydrophobic cell wall that must be traversed.
Our studies of structure-activity relationship suggests that the introduction of substitutes with some balance between hydrophobicity and electron effects in position 1 of the heterocycle, or in position 3 or 4 of the salicylic moiety, may greatly affect the antimycobacterial activity, which will contribute to the discovery of a series of prospective wide-spectrum antimycobacterial substances.
Online since: October 2014
Authors: Feng Ming Nie, Wen Li Liu, Min Xiao, Jian Can Hu
Gel structure and the associated nanoporous property were well maintained during the oxidation process.
Many studies have shown that chitin/chitosan-based adsorbents are prepared through physical or chemical modification and applied in removal of heavy metals from industrial effluents. 3.1 Physical modification The structures of adsorbents have a significant impact on the heavy metal adsorption capacity.
Environmental Chemistry Letters 2012;10:109-17
Chitin and chitosan polymers: Chemistry, solubility and fiber formation.
Many studies have shown that chitin/chitosan-based adsorbents are prepared through physical or chemical modification and applied in removal of heavy metals from industrial effluents. 3.1 Physical modification The structures of adsorbents have a significant impact on the heavy metal adsorption capacity.
Environmental Chemistry Letters 2012;10:109-17
Chitin and chitosan polymers: Chemistry, solubility and fiber formation.
Online since: December 2012
Authors: Abdul Razak Daud, Muhammad Azmi Abd Hamid, Dewi Suriyani Che Halin, Ibrahim Abu Talib, Haroon Haiza
Cu2O forms a cubic structure with a lattice parameter of 4.27 Å [1].
And these TCOs have electronic structure similar to Cu2O, except for considerably larger energy gaps [3].
Basaran : Materials Chemistry and Physic Vol 83 (2004) p. 140 [2] P.E. de Jongh, D.
Cremer and Fresenius: Journal Analytical Chemistry Vol 358 (1997), p. 312 [6] L.
And these TCOs have electronic structure similar to Cu2O, except for considerably larger energy gaps [3].
Basaran : Materials Chemistry and Physic Vol 83 (2004) p. 140 [2] P.E. de Jongh, D.
Cremer and Fresenius: Journal Analytical Chemistry Vol 358 (1997), p. 312 [6] L.
Online since: June 2012
Authors: You Jie Ma, Xue Song Zhou, Jia Rui Wu
Fig.3 No counter-current grid-connected system
Several Key Technologies in Grid-connected PV System
There are a series of important technologies in structure and operation of grid-connected PV generation system, and the operational characteristic of PV generation system can produce a direct influence in power system.
In order to make PV market development better and faster, the following issues should be paid attention: (1) Researching more efficient solar cells, reducing the cost of electricity (2) Studying deeply in several key technologies of PV system, optimizing the internal structure and power quality (3)As a section of smart grid power generation, utilizing power energy more flexible (4) Establishing a perfect market system of grid-connected PV system, formulating corresponding laws, legislations and management policies (5) Improving BIP system, transition from small-scale to large-scale With the solar PV power generation costing reduction, it goes into more large-scale industrial applications, involving in desalination and electric vehicle charging system.
Reference [1] Guiheng Yang, Shengze Qiang, Yingchao Zhang, Yong Zheng, In Chinese: Photovoltaic Power System and Application (Chemistry Industry Publishing, Beijing, China 2011)
[2] Rongqiang Cui, Chunjiang Zhao, Dacheng Wu, In Chinese: Grid-connected Photovoltaic Power Generation System (Chemistry Industry Publishing, Beijing, China 2010)
In order to make PV market development better and faster, the following issues should be paid attention: (1) Researching more efficient solar cells, reducing the cost of electricity (2) Studying deeply in several key technologies of PV system, optimizing the internal structure and power quality (3)As a section of smart grid power generation, utilizing power energy more flexible (4) Establishing a perfect market system of grid-connected PV system, formulating corresponding laws, legislations and management policies (5) Improving BIP system, transition from small-scale to large-scale With the solar PV power generation costing reduction, it goes into more large-scale industrial applications, involving in desalination and electric vehicle charging system.
Reference [1] Guiheng Yang, Shengze Qiang, Yingchao Zhang, Yong Zheng, In Chinese: Photovoltaic Power System and Application (Chemistry Industry Publishing, Beijing, China 2011)
[2] Rongqiang Cui, Chunjiang Zhao, Dacheng Wu, In Chinese: Grid-connected Photovoltaic Power Generation System (Chemistry Industry Publishing, Beijing, China 2010)
Online since: August 2019
Authors: Risdiana Risdiana, Fitrilawati Fitrilawati, Norman Syakir, Anna Niska Fauza, Atikah Ardi, Soni Setiadji, Iman Rahayu, Waslaluddin Waslaluddin, Ressa Novianti, Arief Sjamsulaksan Kartasasmita
Optimization of Polydimethylsiloxane Synthesized Parameters as Vitreous Humour Substitutes
Soni Setiadji1,3,a, Fitrilawati2,b, Anna N Fauza2,c, Atikah Ardi2,d,
Ressa M Novianti2,e, Norman Syakir2,f, Waslaluddin1,g, Iman Rahayu1,h,
Arief S Kartasasmita4,i, and Risdiana2,j*
1Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jl.
Raya Bandung-Sumedang km 21 Jatinangor, Sumedang, West Java, Indonesia 45363 3Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung, Jl.
All FTIR spectrums show functional groups of PDMS structure without any impurity group.
All FTIR spectra show functional groups of PDMS structure without any impurity group indicating that PDMS with two types of viscosity were successfully synthesized with high quality PDMS.
Raya Bandung-Sumedang km 21 Jatinangor, Sumedang, West Java, Indonesia 45363 3Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung, Jl.
All FTIR spectrums show functional groups of PDMS structure without any impurity group.
All FTIR spectra show functional groups of PDMS structure without any impurity group indicating that PDMS with two types of viscosity were successfully synthesized with high quality PDMS.
Online since: July 2016
Authors: Ibrahim Nor Azowa, Wan MD Zin Wan Yunus, Ahmad Mansor, Ali Aidy, Ong Keat Khim, Mohamat Yusuff Soleha, Fitrianto Anwar, Syed Ahmad Syed Mohamad Shafiq, Noor Aisyah Ahmad Shah, Chin Chuang Teoh, Ku Zarina Ku Ahmad
Characterization of Raw and Thermally Treated Alum Sludge
MOHAMAT YUSUFF SOLEHA1,a, KEAT KHIM ONG2,b*,
WAN YUNUS WAN MD ZIN1,c, AHMAD MANSOR3,d, FITRIANTO ANWAR 4,e, IBRAHIM NOR AZOWA 3,f, SYED AHMAD SYED MOHAMAD SHAFIQ 2,g, AHMAD SHAH NOOR AISYAH2,h, ALI AIDY5,i, KU AHMAD KU ZARINA5,j
and CHIN CHUANG TEOH 6,k
1Department of Defence Science, Faculty of Defence Science and Technology, Universiti Pertahanan Nasional Malaysia, Kem Sungai Besi, 57000 Kuala Lumpur, Malaysia
2Department of Chemistry and Biology, Centre for Defence Foundation Studies, Universiti Pertahanan Nasional Malaysia, Kem Sungai Besi, 57000 Kuala Lumpur, Malaysia
3Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
4Department of Mathematics, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
5Department of Mechanical Engineering, Faculty of Engineering, Universiti Pertahanan Nasional Malaysia, Kem Sungai Besi, 57000
The patterns reveal that the raw and thermally treated alum sludge have well-defined crystalline structures as indicated by the presence of sharp peaks.
The similarity of the XRD patterns of raw and 300°C thermally treated alum sludge indicates that heating of sludge at that particular temperature does not significantly disrupt the structure of the sludge.
The patterns reveal that the raw and thermally treated alum sludge have well-defined crystalline structures as indicated by the presence of sharp peaks.
The similarity of the XRD patterns of raw and 300°C thermally treated alum sludge indicates that heating of sludge at that particular temperature does not significantly disrupt the structure of the sludge.