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Online since: September 2013
Authors: Chun Lei Yang, Xiao Yan Yuan, Jun Yu, Jin Peng Yang, Shu Yang, Ai Fei Gao, Cheng Wei Ma, Xiu Zhi Du, Kai Cheng Fu
Compared to the water as the medium of solar collector, For Solar air collector (Li Lidun 1991, Wang Hengyi 1993, Abu-Hamdch N H, 2003; he Zinian, 2009) there were some advantageous such as low cost, low requirement on the structure strength, high temperature rising-rate.
After the curing ended, the rate of first and second class, average income; chemistry of upper leaves, the component would be recorded and analysis.
After the curing ended, the rate of first and second class, average income; chemistry of upper leaves, the component would be recorded and analysis.
Online since: July 2015
Authors: Brigitte Weiss, Herbert Danninger, Agnieszka Betzwar Kotas
Gigacycle fatigue behaviour of sintered WC-Co hardmetals investigated by ultrasonic resonance testing
Agnieszka BETZWAR KOTAS 1a*, Brigitte WEISS 2b, Herbert DANNINGER 3c
1Faculty of Technical Chemistry, Vienna University of Technology, Getreidemarkt 9, 1060 Vienna, Austria
2Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090 Vienna, Austria
aagnieszka.kotas@tuwien.ac.at, bbrigitte.weiss@univie.ac.at, 3herbert.danninger@tuwien.ac.at
Keywords: gigacycle fatigue, WC-Co hardmetals, ultrasonic fatigue testing, fatigue limit
Abstract.
These properties result from the complex composite structure of interpenetrating networks of a hard, brittle carbide phase, usually WC, and a tough metallic binder, usually Co [1-2].
These properties result from the complex composite structure of interpenetrating networks of a hard, brittle carbide phase, usually WC, and a tough metallic binder, usually Co [1-2].
Online since: January 2004
Authors: Al. Rempel, Hans Eckhardt Schaefer, K. Sato, W. Sprengel, F. Baier
Schaefer1
1
University of Stuttgart, Institute of Theoretical and Applied Physics, Pfaffenwaldring 57/VI
D-70550 Stuttgart, Germany, email: sprengel@itap.physik.uni-stuttgart.de
2
Institute of Solid State Chemistry, RAS, Pervomaiskaya 91
GSP-145 Ekaterinburg 620219, Russia, email: rempel@ihim.uran.ru
3
now at: Ames Laboratory, 321 Spedding, Ames, Iowa 50010, USA, email: falko@iastate.edu
4
now at: National Institute of Advanced Industrial Science and Technology (AIST),
1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan, email: sato-k@aist.go.jp
Keywords: lattice vacancies, phase transitions, SiC, quasicrystals, coincident Doppler broadening
Abstract.
It should be pointed out that the present studies of phase transformations in quasicrystals may substantially help to understand why quasicrystals with their unusual nonperiodic structure form [14].
It should be pointed out that the present studies of phase transformations in quasicrystals may substantially help to understand why quasicrystals with their unusual nonperiodic structure form [14].
Online since: May 2004
Authors: U.B. Mioč, Zoran Nedić, R. Biljić, T. Čajkovski, M. Davidović, D. Čajkovski, V. Likar-Smiljanić, S. Sredić, M. Marinović-Cincović
Bilji�
5
1
Institute of Mining, Prijedor, Bosnia and Herzegovina (Republic of Srpska)
2
The Vin"a Institute of Nuclear Sciences, Belgrade, Serbia and Montenegro
3
School of Electrical Engineering, University of Belgrade, Belgrade, Serbia and
Montenegro
4Faculty of Physical Chemistry, Belgrade, Serbia and Montenegro
5VTA arkovo, Belgrade, Serbia and Montenegro
Keywords: 12-Tungstophosphoric Acid, Impedance, Montmorillonite, Pillared Clays,
Proton Conductivity
ABSTRACT
Bentonite a natural raw material from the ipovo mining deposits (Republic of Srpska),
which contains a high percentage of montmorillonite, was treated to obtain montmorillonite clay
ready for further investigations.
IR measurements In the IR spectra of pillared montmorillonite and doped sample, the H2O band at about 3430 cm-1 is broad and well structured showing the existence of different forms of water molecules.
IR measurements In the IR spectra of pillared montmorillonite and doped sample, the H2O band at about 3430 cm-1 is broad and well structured showing the existence of different forms of water molecules.
Online since: September 2013
Authors: Stanislav Honus, Dagmar Juchelková, Przemyslaw Bukowski
This element was discovered (named) in 1776 by the English chemist and physicist Henry Cavendisz, considered the founder of the chemistry of gases.
Their popularity comes from the low operating temperatures (not exceeding 350 K), simple structure and high efficiency above 50%.
Their popularity comes from the low operating temperatures (not exceeding 350 K), simple structure and high efficiency above 50%.
Online since: October 2012
Authors: Wan Guo Hou, Lin Wang, Xue Feng Liang, Yue Bing Sun, Yingming Xu
Sorption of Pb2+ on Mg-Al-Fe Hydrotalcite-like Compounds
Xuefeng Liang1, Wanguo Hou2a*, Yingming Xu1b*, Lin Wang1, Yuebing Sun1
1 Key Laboratory of Original Environmental Quality of MOA and Tianjin Key Laboratory of Agro-Environment and Agro-Product Safety, Agro-Environmental Protection Institute of Ministry of Agriculture, Tianjin, 300191, PR China
2 Key Laboratory for Colloid and Interface Chemistry of Education Ministry, Shandong University, Jinan, 250100, PR China
awghou@sdu.edu.cn, bdingandliang@gmail.com
Keywords: hydrotalcite-like compounds; lead; sorption; mechanism
Abstract: Hydrotalcite-like compounds containing Mg2+, Al3+ and Fe3+ with a constant M2+/M3+ ratio but varying Al3+/Fe3+ ratios have been prepared.
Sorption mechanisms Fig. 4 XRD patterns of Mg-Al-Fe HTlc samples after sorption of Pb2+ ●Pb3(CO3)2(OH)2 ▼Mg-Al-Fe HTlc For Mg-Al-Fe HTlc samples after sorption shown in Fig. 4, all the character peaks of the HTlc sample were also observed but the intensities of the XRD peaks decreased, indicating that Pb2+ sorption did not obviously changed the layered crystal structure.
Sorption mechanisms Fig. 4 XRD patterns of Mg-Al-Fe HTlc samples after sorption of Pb2+ ●Pb3(CO3)2(OH)2 ▼Mg-Al-Fe HTlc For Mg-Al-Fe HTlc samples after sorption shown in Fig. 4, all the character peaks of the HTlc sample were also observed but the intensities of the XRD peaks decreased, indicating that Pb2+ sorption did not obviously changed the layered crystal structure.
Online since: December 2013
Authors: Kenji Kubota, Yoshiharu Toyama, Nobukazu Nameki, Kaori Wakamatsu
Effect of Deglycosylation on the Fibrin Polymerization Depending on NaCl Concentration
Kenji Kubotaa, Yoshiharu Toyama, Nobukazu Nameki, and Kaori Wakamatsu
Department of Chemistry and Chemical Biology,
Graduate School of Engineering, Gunma University, Kiryu, Gunma 376-8515, Japan
akkubota@chem-bio.gunma-u.ac.jp
Keywords: Fibrinogen, N-linked Carbohydrate Chain, Salt concentration, Fibrin Polymerization
Abstract.
On the other hand, it is known that the structure of fibrin gels formed at various ionic strengths are notably different, with apparently thinner fibers at high salt concentration [5].
On the other hand, it is known that the structure of fibrin gels formed at various ionic strengths are notably different, with apparently thinner fibers at high salt concentration [5].
Online since: January 2013
Authors: Yan Wang, Ai Qin Du, Ai Ling Du, Xia Li
Isolation of oxymatrine from alkaloids of Sophora flavescens Ait. by H103 macroporous resin
Xia Li, Ailing Du a,Aiqin Du,Yan Wang
School of Chemistry and Chemical Engineering, Shandong University, Jinan 250061, China
aduailing@sdu.edu.cn
Keywords: oxymatrine, Sophora flavescens Ait., macroporous resin.
However, the content of oxymatrine in Sophora flavescens Ait. is very low; the obtained extraction usually contains various impurities, such as sitosterol, tannin, protein pigmentum and other alkaloids whose structures are similar to oxymatrine.
However, the content of oxymatrine in Sophora flavescens Ait. is very low; the obtained extraction usually contains various impurities, such as sitosterol, tannin, protein pigmentum and other alkaloids whose structures are similar to oxymatrine.
Online since: February 2014
Authors: Idha Royani, Khairurrijal Khairurrijal, Abdullah Mikrajuddin, Widayani Widayani
When target/guest molecules, which have similar structure and properties with those of the template, are exposed to the MIP, the MIP will recognize and be able to coordinate/bind the target/guest effectively.
Chehimi, Aryl Diazonium Salt Surface Chemistry and ATRP for the Preparation of Molecularly Imprinted Polymer Grafts on Gold Substrates, Surf.
Chehimi, Aryl Diazonium Salt Surface Chemistry and ATRP for the Preparation of Molecularly Imprinted Polymer Grafts on Gold Substrates, Surf.
Online since: February 2015
Authors: Simone Simões Amaral, Juliana Esteves Fernandes Cieslinski, Maria Angélica Martins Costa, João Andrade Carvalho
Particle diameter as a function of time – Forest residues
In the smoldering phase there has been an increase in the diameter of the particles collected, except for the test 3 sugarcane bagasse (due to high moisture content biomass the test was interrupted at the beginning of the glowing phase), for tests 1 and 2 of rice husk (there was a decrease in diameter of the particles collected due to the basic nature of particles), along with the volatility observed, i.e. the different combustion conditions can act differently for the different particles, potentially facilitating the process of with other particles, resulting in an increase in diameter – the higher the melting point, less volatilization and therefore, greater fixation between the particles and bigger diameter, what happened during the call and for testing with Eucalyptus grandis (there was no decrease in the diameter of the particles collected due to the different structures between hardwoods – Eucalyptus grandisand resinous
Particle size distributions from laboratory-scale biomass fires using fast response instruments, Atmospheric Chemistry And Physics. 10 (2010) 8065-8076
Particle size distributions from laboratory-scale biomass fires using fast response instruments, Atmospheric Chemistry And Physics. 10 (2010) 8065-8076