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Online since: January 2014
Authors: Qin Zhang, Long Jiang Li, Yue Qin Qiu, Xiao Yun Zhao
Ground potential and ground potential gradient of metal structures were measured by connecting intelligent stray current meter and two a saturated copper/copper sulphate reference electrode.
To-ground potential and ground potential gradient of metal structures were measured by connecting intelligent stray current meter and two a saturated copper/copper sulphate reference electrode.
The actual simulation environment is the DC source cable circuit fault, the current positive side lapping other metal structures inflows the soil of anode side of orbit, and then flows out from the soil, negative terminal lapping metal structures inflows into the cable.
The actual simulation environment is the DC source cable circuit fault,the current positive side lapping other metal structures inflows the soil of cathode side of orbit, and then flows out from the soil, negative terminal lapping metal structures inflows into the cable.
This method can not only detect mines stray current, but also be used on body Detection of other metal structures to ground potential and the ground potential gradient.
Online since: January 2017
Authors: Zhi Tong, Hai Yun Hou, Jing Yang, Linyu Li
High flux can be achieved by using a thin and porous structure and appropriate interaction between the permeating molecules and the pore surface [3].
Crystal structures were examined by a Rigaku D/max2200pc X-ray diffractometer with CuKα radiation (λ=1.54056Å) produced at 40 kV and 40 mA.
The pore structure parameters are shown in Table 2.
From the viewpoint of pore structure, the Pd-SiO2 membrane materials are more desirable for the use as gas separation than SiO2 sample without Pd-doping.
The doping of metallic Pd0 nearly has no influence on the chemical structure of the Pd-SiO2 membrane materials.
Online since: February 2019
Authors: N.S. Yousef, Z.F. Ghatass, Mohamed S. Badawi, M.M. Mohamed, Mostafa Elkhatib, Ahmed M. El-Khatib
Silver carbon microspheres due to their ordered structure, high aspect ratio; ultra-lightweight, high mechanical strength and high surface area are suitable for adsorption [19-20].
The peaks at 452 cm−1 and 554 cm−1 confirmed crystal structure of zinc oxide and Silver oxide nanoparticles respectively; the peaks around 3444 cm−1 are due to –OH stretching vibration.
The structures of zinc oxide prepared through starch gel and deposited on the silica nanoparticle surface were compared; the ZnO–Si displayed higher photocatalytic activity due to its less particle size and better dispersion.
Baburaja, et al., (2014) “Degradation of Methylene Blue Using Biologically Synthesized Silver Nanoparticles,” Bioinorganic Chemistry and Applications, vol. 2014, Article ID 742346, 8 pages,. doi:10.1155/2014/742346
[64] LinqinJiang,LianGao, (2004)” Fabrication and characterization of ZnO-coated multi-walled carbon nanotubes with enhanced photocatalytic activity”, Volume 91, Issues 2–3, 15 June 2005, Materials Chemistry and Physics, doi.org/10.1016/j.matchemphys..11.028
Online since: August 2019
Authors: Warayuth Sajomsang, Ekachai Dumkliang, Rungnapha Saeeng, Wei Ming Zhu, Teeratas Kansom, Praneet Opanasopit, Prasopchai Patrojanasophon
Folate-Functionalized Amphiphilic Chitosan Polymeric Micelles Containing Andrographolide Analogue (3A.1) for Colorectal Cancer Teeratas Kansom1,a, Ekachai Dumkliang1,b, Prasopchai Patrojanasophon1,c Warayuth Sajomsang2,d, Rungnapha Saeeng3,e, Weiming Zhu4,f and Praneet Opanasopit1,g,* 1Pharmaceutical Development of Green Innovations Group (PDGIG), Faculty of Pharmacy, Nakhon Pathom, Thailand 2National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Thailand Science Park, Pathum Thani, Thailand 3Department of Chemistry, Faculty of Science, Burapha University, Chonburi, Thailand 4School of Medicine and Pharmacy, Ocean University of China, China akansom_t@su.ac.th, bekachaidk@gmail.com, cpatrojanasophon_p@su.ac.th, dwarayuth@nanotec.or.th, erungnaph@buu.ac.th, fweimingzhu@ouc.edu.cn, g,*opanasopit_p@su.ac.th Keywords: andrographolide, chitosan, polymeric micelles, folate, colorectal cancer Abstract.
The micelles were in the nanometer range, having a negative surface charge and a spherical structure.
Polymeric micelle can entrap an anticancer drug into the inner core of the core-shell structure, and help to protect the drug before reaching tumor sites.
Chemical structure of (a) andrographolide and (b) andrographolide analogue (3A.1).
Before the analysis, the micelle sample was mixed with a mixture of DMSO:water (9:1, v/v) to rupture the core-shell structure of the micelles.
Online since: October 2011
Authors: Xanthippi Chatzistavrou, Ourania Menti Goudouri, Eleana Kontonasaki, Konstantinos M. Paraskevopoulos, Petros Koidis, Lambrini Papadopoulou, Eleni Theodosoglou, Anna Theocharidou
Recently, bioactive Mg-based ceramics have attracted interest as Mg plays an important role on skeletal metabolism and affects the quality and structure of hard dental tissues.
To date, ceramic scaffolds present important advantages compared to polymeric scaffolds, such as porous structure and chemical texture that promotes mesenchymal cells differentiation and mineralization of the extracellular matrix [4,5], while the most important is the lack of toxic byproducts of the polymeric materials.
Simultaneously, the possibility of synthesis of these bioceramics with a variety of methods, such as sol gel, gives the possibility of developing materials with controlled porous structure and high surface energy [12,13].
Yamamuro, Solutions Able to Reproduce In Vivo Surface-Structure Changes in Bioactive Glass-Ceramic A-W, J.
[16] Downs R T, The RRUFF Project: an integrated study of the chemistry, crystallography, Raman and infrared spectroscopy of minerals.
Online since: June 2019
Authors: Jun Qin, Jin Chao Yang, Guangbao Du, Xinan Cai, Wei Jun Zhang
Silver particles have some association with above polymer network structure and form a stronger internal structure of silver paste together.
In addition, the recovery rate of internal network structure of silver paste is highly related to the type and strength of network structure[14].
Therefore, new network structures can be introduced in order to strength internal network structure and improve the recovery properties of silver paste.
Fig. 6. 3D network structure of controlled flocculating system.
Kim, Effect of Glass Frit Chemistry on the Physical and Electrical Properties of Thick-Film Ag Contacts for Silicon Solar Cells, J. electron.
Online since: January 2011
Authors: Xing Li Liu, Ye Qin
In the figure, all the major knowledge revolve around the engineering project design and they integrate together to form a whole, which fully demonstrating the CDIO knowledge structure in “engineering basics”, “basic science knowledge”, “core fundamental knowledge” and “advanced engineering fundamental knowledge” [4].
The first step to making education plan is setting basic courses such as mathematics, physics, chemistry and so on which let students have basic scientific literacy and lay a good foundation for the future major courses learning so as to accomplish the “engineering fundamentals” of the CDIO education.
As a third grade item, ic is defined as a triple, namely, ic = (info, iq, seq) , (4) where info and seq is same definition as ia, iq is a second grade item and ic is one of third grade items in iq.In summary, the structure of a CDIO-based major education plan is shown in Fig. 2, where ia, ib and ic express first, second and third grade item respectively.
ib info seq info ia seq item_list info ib seq ic ic ic ia ic Fig. 2 Structure of item in the education plan EPIPS Implementation The system is built on.NET framework by C# language in browser/server mode with database of SQL Server 2008.
Firstly CDIO education system is analyzed and the structure of major education plan based on CDIO is constructed.
Online since: April 2011
Authors: Ana Karina Cuentas-Gallegos, Abraham Zamudio-Flores, Montse Casas-Cabanas
Among their applications in the catalysis field, the electrocatalytic properties have been studied more recently on the electroreduction of different analytes (nitrate, bromated, iodate, hydrogen peroxide) due to their potential use in the development of amperometric sensors. [2-17] POMs in their acidic form are known as Heteropolyacids (HPAs) consisting of large polyanions with Keggin structure (primary structure), cations, water crystallization, and other molecules.
This 3D arrangement is known as the secondary structure, while the ternary structure determines the particle size, surface area, pore size, etc, and is very determinant on their final properties as solid HPAs [18].
Nevertheless, the presence of such nanoparticles is confirmed, in good agreement with XRD data, and the typical vibrational modes of the SiW12 Keggin structure (979 cm-1 for Si-O, 923 cm-1 for W=O, 877 cm-1 from W-O vertex, and 778cm-1 from W-O edge) are marked with an asterisk for MH3 with some shifts suggesting the interaction with the NTS matrix [40].
[45] CRC Handbook of Chemistry and Physics, editor in Chief David R.
Online since: August 2015
Authors: Panpailin Seeharaj, Tanthip Eamsa-Ard, Eakkasit Thasirisap
Synthesis and Characterization of PolyHIPEs Composites with Silica and Iron oxide Nanoparticles Panpailin Seeharaja*, Tanthip Eamsa-ardb and Eakkasit Thasirisapc Advanced Materials Research Unit, Department of Chemistry, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang, Bangkok, 10520, Thailand akspanpai@kmitl.ac.th, baom_911@hotmail.com, ceaktha23@gmail.com Keywords: PolyHIPEs, high internal phase emulsions, composites, nanoparticles.
These make polyHIPEs to be considered for various applications that require porous structured materials with high specific surface area such as filtration, ion exchange membrane separation, chromatography, tissue engineering, microelectronic technology and heterogeneous catalytic reaction [1-3]. 
However, the microstructure observed from SEM (Fig. 1) showed that the samples possessed open cellular porous structure with highly interconnected open pore network which is the characteristic of polyHIPEs.
For polyHIPEs composites with 1%SiO2-5%Fe3O4, the low mechanical properties could be a result of the high interconnected open pore structure with high total pore volume.
While in the case of polyHIPEs composites with 1%SiO2-10%Fe3O4 and 1%SiO2-15%Fe3O4, the non-uniform pore size distribution structure with some fused polymer particles could be responsible for the poor mechanical strength.
Online since: September 2007
Authors: R.A. Andrievski
In addition, the hydrogen behavior in materials attracts the attention of specialists in solid-state physics and solid-state chemistry including the surface aspects (see, for example, [1-7]).
The formation of nanocrystalline structure and reduction in hydride powders size substantially improve their hydrogen absorption/desorption characteristics.
Structure and some Physical Properties It is common knowledge that proton nuclear magnetic resonance and neutron diffraction are powerful tools to elucidate the hydrogen atom location in hydrides.
As it is evident from Fig. 7, a, the GdCo2 intermetallic hydrogenation up to high hydrogen content (x=3.76) is not assisted by the new phase appearance because the structures of all hydrides are similar to the initial structure of GdCo2 (a cubic MgCu2- type structure).