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Online since: December 2013
Authors: Xi Feng Zhang, Hong Xia Dong, Zhen Ye Xu, Ke Wei Li, Min Qin
Synthesis, physicochemical, and tribological characterization of nano lubricant contained Cu nanocolloid as additive Xifeng Zhang1, a *, Hongxia Dong1,b, Zhenye Xu1,c, Keiwei Li1,d and Min Qin 1,e 1School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China azhangxf_chzh@163.com, b841759188@qq.com, cxuzy@163.com,d lkwgood2010@126.com, eqinmin@126.com Keywords: Lubricating oils; nanocolloid; Tribology; Chemical properties of materials; Wear; Friction Abstract.
The particle size, shape, aggregation, and crystal structure of nano-Cu were determined by transmission electron microscopy (TEM) using a Phillips TECNAI-12 (accelerate voltage 120 kV).
Results and discussion Chemical, micro-structure and morphology analysis of Cu nanocolloid.Fig.1 and Fig.2 show the XRD pattern, TEM and SAED images of the synthesized Cu nanocolloid, respectively.
The SAED pattern in Fig. 2 (b) of the sample indicates that this kind of nanostructured Cu has a monocrystalline structure. .
Online since: January 2018
Authors: Mohamad Shakri Shariff bin Mohmad Shariff, Cheekhooree Kooleshwarsingh
Soil at a construction site might not be ideal for a specific structure such as high rise condominiums, highways or dams [2].
It is very difficult to construct any structure unless pre-treatment of the soil is carried out or special foundation is used [7].
A number of research have been carried out with POFA and it has been concluded that POFA increases the life of structures because of its high durability.
Oriental Journal of Chemistry, 32(4), pp.2087–2094. (2016) [17] ASTM Standard 854-00, Specific Gravity Test – Standard Test for Specific Gravity of Soil Solids by Water Pcynometer.
Online since: January 2013
Authors: Takuya Tsujiguchi, Nobuyoshi Nakagawa, Enas Taha Kasem
The sputtering time was set for 5 nm and 30 nm of thickness based on the sputtering rate of each element. 2.2 MEA preparation and cell structure A carbon paper with and without sputtered metal was used as the anode.
Figure 1 shows the fuel cell structure used in this study.
The current density was calculated based on the effective anode area, 4 cm2. 1- Cover plates  2- Anode chamber 3- Current collectors  4- Anode 5- Membrane and cathode Fig. 1 A schematic diagram of the cell structure 2.3 Yeast and anolyte preparation Saccharomyces cerevisiae (Bakers yeast, S.I.L esaffre 59703 Marcq France) was used as the biocatalyst.
Mitov: Industrial & Engineering Chemistry Research Vol. 50 (2011), p. 557
Online since: May 2012
Authors: Tian Hua Yang, Li Hong Wei, Na Zhang
But the coal deashing can lead to changes of coal structure [4]: the reactivity of the high ranking coal improves, while the one of the low ranking coal declines.
Due to the introduction of MgO, it prevented hydrocarbons, hydrocarbon from the formation of chemical structure and accelerated the degradation of hydrocarbon[8], thus the homogeneous ignition temperature of coal reduced.
Journal of Fuel Chemistry and Technology (In Chinese). 2009, 37(4): 421-426
Coal structure and reactivity changes induced by chemical demineralization[J].
Online since: December 2024
Authors: Youstina Ramsis, Ernestos Sarris, Loizos Papaloizou, Demetris Vattis
They include within their structure ionizable functional groups that when exposed to water ionize into cations or anions, and some remain neutral.
The main crystal in the smectitic structure is SiO2 and varies between 59-68 %.
The conclusions of this work can be summarized as: · Using anionic polymers for amending waste K+-rich bentonite proofs as an efficient process to improve the colloidal properties of a drilling fluid system through the creation of composite structures of the bentonite
E.. in Soil and water chemistry: an integrative approach, Taylor & Francis, CRC Press, Florida (2015).
Online since: February 2014
Authors: Emmanuel Iwuoha, Unathi Sidwaba, Rachel F. Ajayi, Usisipho Feleni, Samantha Douman, Priscilla Gloria Lorraine Baker, Sibulelo L. Vilakazi, Robert Tshikhudo
Iwuoha1* 1SensorLab, Department of Chemistry, University of the Western Cape, Private Bag X17, Bellville, 7535, South Africa 2Nanotechnology Innovation Centre, Advanced Materials Division, Mintek, Randburg, Johannesburg, South Africa.
Pyrazinamide (see structure in Fig. 1) is normally administered along with ethambutol, isoniazid and rifampicin.
Structure of pyrazinamide.
The PANI-MWCNT nanocomposite exhibits tubular structures (Fig. 3C), while PANI (Fig. 3B) displays small spherical particles of uniform size.
Online since: April 2008
Authors: Lubomír Nĕmec, Petra Cincibusová, Jiří Brada
The influence of glass melt flow character on the bubble removal process Petra Cincibusová1, Lubomír Němec1, Jiří Brada 2 1 Laboratory of Inorganic Materials, Joint Workplace of the Institute of Chemical Technology Prague, Technická 5, 166 28 Prague 6, and the Institute of Inorganic Chemistry AS CR, 250 68 Řež, Czech Republic 2 Glass Service, Inc., Rokytnice 60, 755 01 Vsetín, Czech Republic 1 petra.cincibusova@vscht.cz, 1 lubomir.nemec@vscht.cz, 2bradaj@gsl.cz Keywords: Bubble removal, simplified model, temperature distribution, space utilization.
The virtual bubble rising distance is then given analogically to equation (6): virt Fcrith C= τ (7) By using of equations (5-7), we have: 1/3 Q Fcrit virt Fplug 0 h K h   τ = =   τ   (8) By using of equations (4) and (8), the volume fining performance of the channel may be written as: ( )virt 1/3 m Q Fplug virt Fplug 0 V 1 m V V K K h h − = = τ   τ    & (9) As the circulation flows are mostly evoked by temperature differences, the constant average temperature should be maintained to insure comparison between different flow structures.
The model glass was the glass for production of TV bulbs characterized by following properties [2]: ( ) 3 2790 0.2378T ;[kg / m ] exp 11.501 6144.6/ T 710.64 ;[Pa s] ρ = − η = ρ − + − ⋅     The different melt flow structures were created by application of appropriate temperature boundary conditions (linear temperature gradients).
In spaces with natural convection, the properly set temperature boundary conditions evoke the structure of glass flow, favourable for the given process.
Online since: June 2009
Authors: Sarah Montes, Agustín Etxeberria, Hans Grande, Jose A. Pomposo
Pomposo4,d 1,2,4New Materials Department, CIDETEC, Paseo Miramón 196, Donostia E-20009, Spain 3 Departament of Polymer Science and Technology, Faculty of Chemistry and Polymat, UPV/EHU, P.O.
Stoll, A Monte Carlo Study of Weak Polyampholytes: Stiffness and Primary Structure Influences on Titration Curves and Chain Conformations, Macromolecules 38 (2005) 8939
Abu-Sharkh, Structure and Mechanism of the Deposition of Multilayers of Polyelectrolytes and Nanoparticles, Langmuir 22 (2006) 3028
Nyrkova, Compatibility enhancement and microdomain structuring in weakly charged polyelectrolyte mixtures, Macromolecules 25 (1992) 1493
Online since: August 2018
Authors: Thitinai Gaewdang, Ngamnit Wongcharoen
It is anticipated that high performance p-type oxide semiconductors will promote a new era in the field of transparent electronics and displays by allowing the design of complementary metal oxide semiconductor (CMOS) structures with both n-type and p-type TFTs devices.
Cu2O and CuO belong to cubic and monoclinic structures with band gap of 2.1-2.6 eV and 1.9-2.1 eV, respectively [3].
The crystal structure of these films was checked by X-ray diffraction technique with a Brucker D 8 diffractometer using CuKa radiation.
Hassan, Effect of oxygen percentage on the growth of copper oxide thin films by reactive radio frequency sputtering, Materials Chemistry and Physics 140 (2013) 243-248
Online since: November 2015
Authors: Yan Ying Zhao, Xin Liu
Adsorption Kinetics of Methylene Blue on Synthesized DMF-MIL-101(Cr), a DMF-functionalized Metal-organic Framework Xin Liu, Yanying Zhao* Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, 310018, China * Corresponding author: Yanying Zhao; E-mail: yyzhao@zstu.edu.cn Keywords: N,N-dimethylformamide (DMF)-functionalized metal–organic framework, DMF-MIL-101(Cr), adsorption kinetics, methylene blue Abstract.
Molecular simulation studies have shown that, owing to its structure, MIL-101(Cr) can storegasmolecules [11].
Recently, Haque and coworkers investigated the adsorption behaviors of various dyes using the amino-functionalized MOF, amino-MIL-101(Al) [32], which exhibited a maximum MB-adsorption capacity of 762±12 mg/gMOF at 30 °C.DMF has a structure similar to that ofammonia, which maybe account for the adsorption kinetics of MB on DMF-MIL-101(Cr).
This confirmed once again that DMF changed the structure of MIL-101(Cr).