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Online since: January 2012
Authors: Sandra G. Schneider, João Paulo Barros Machado, A.L.A. Escada, Roberto Zenhei Nakazato, Ana Paula Rosifini Alves Claro
The objective of this paper is to produce a calcium phosphate coating evenly distributed on the Ti-7.5Mo that grows from a nanotubular oxide structure.
Surface morphology and coating chemistry were obtained respectively using a scanning electron microscope (SEM, LEO 1450 VP, Zeiss, Germany) and an energy dispersive X-Ray spectrometer (EDS, Oxford Instruments, Inca Energy Model, UK).
For samples anodized to 20 V after immersion in 5.0-M NaOH at 80ºC for 2 h the substrates exhibited microporous structures as shown in Fig. 3a.
The pore size in this structure, (20–60 nm), is in agreement with the results reported by Ho et al. [22].
Chern Lin, Structure and properties of cast binary Ti}Mo alloys, Biomaterials 20 (1999) 2115-2122
Online since: June 2011
Authors: Xiao Ping Zou, Jin Cheng
It reveals that the products have a hollow-core structure that is a typical structure of CNTs.
This indicates that these CNTs have fewer defects in structure.
Their morphology and structure are very similar to that of CNTs deposited on quartz substrates.
The reason that the products deposited on quartz substrates and the wall of furnace tube have similar morphology and structure is related to the synthesis process.
So they have similar morphology and structure.
Online since: December 2013
Authors: Masakazu Aono, Takami Hino, Tohru Tsuruoka, Tsuyoshi Hasegawa, Hirofumi Tanaka, Takuji Ogawa
There is an additional problem in that the Ag structure is easily peeled off during the EB lithography lift-off process.
The 1st and 2nd structures were made by EB lithography and subsequent metal deposition.
The 1st layer has a structure of Pt/Ti (50/10 nm) and the 2nd layer has a structure of Pt/Ag/Pt/Ti (5/40/5/5 nm).
After the lift-off process of the 2nd structure, the pattern was sulfurized in a petri dish with sulfur crystals at 80ºC for 20 min.
The 3rd structure of Pt/Ti (25/5 nm) was made by a shadow deposition technique, with an angle of 30º, through a metal mask (50 mm width line and space pattern).
Online since: April 2013
Authors: Di Tang, Hui Bin Wu, Sheng Liu, Zheng Xu Cai
From an industrial standpoint, the scale structure is dependent on coiling process.
In turn, the scale structure significantly affects the surface quality of steel strip [6, 7].
However, the lamellar Fe+Fe3O4 structure formed 400°C was finer than that formed at 450°C.
Physical chemistry of metals, McGraw-Hill Book Company, New York, 1953
Effects of initial scale structure on transformation behavior of wustite, ISIJ International. 52 ( 2012) 105-109
Online since: November 2010
Authors: Hsi Hsun Tsai, Sheng Ching Wang
(interval of fringe pattern) The reflective central wavelength of FBGs is inherently sensitive to temperature due to the characteristics of the grating structure.
For instance, bimetal structures constructed in planar and cylindrical shapes are used for this purpose.
Pan et al. [19, 20, 21] developed a preliminary bimetal structure of temperature- compensated FBGs by the use of the contraction force of the (between) associated fixture.
Yoffe et al. [32], Engelberth [4] and Tsai[28] developed a cylindrical bimetal structure to compensate the central wavelength shift induced by the change of the ambient temperature.
[6]Evans, J.S.O., et al., Chemistry of Materials, 8(12)(1996) [7]Fleming, Debra Anne; Johnson, David Wilfred; Kowach, Glen Robert; Lemaire, Paul Joseph; US6258743 (2001) [8]Fleming, Debra Anne; Johnson, Jr., David Wilfred, Lemaire, Paul JosephUS5694503 (1997) [9]Gillery et al., J.
Online since: September 2013
Authors: Li Zhao, Wei Su, Li Li Chen, Hua Liu, Mei Lan Yuan
Viscosity is an important index as collagen quality judgment; it is to a certain extent reflects collagen the change of the molecular structure and physical and chemical properties.
Effect of concentration on the viscosity of ASC and PSC form Amiurus nebulosus skin It is also seen that Amiurus nebulosus skin ASC viscosity increased faster than PSC viscosity in Fig 1; it may attribution to Amiurus nebulosus skin collagen structure and polymer properties.
This suggests that in high alkaline conditions, Amiurus nebulosus skin ASC and PSC will degeneration, then its molecular structure change from close conformation to loose random state [13, 14], finally lead to Amiurus nebulosus skin collagen solution viscosity bigger.
When the collagen viscosity increases to maximum, then it would decline at a certain degree, this phenomenon may be due to the collagen rigid chain structure gradually growing and the collagen molecular chain occurred fracture along with extension of storage time [16].
J: Food Chemistry, 65(1): pp. 55-59, (1999)
Online since: November 2014
Authors: Meng Lin Sun, Chun Fang Du, Zhi Liang Liu, Qi Hang Zhao
Synthesis, Characterization and Photocatalytic Activity of BiOCl Nanomaterials Menglin Suna,Qihang Zhaob, Chunfang Duc* and Zhiliang Liud College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia, 010012, P.R.
Among them, the three-dimensional hierarchical structure has attracted much attention owing to their large surface area, which is instrumental to improve the photocatalytic activities.
The characteristic diffraction peaks of all products can be well assigned to tetragonal structure of BiOCl (JCPDS card No.06-0249).
SEM image (Fig.1b) reveals the flowerlike structure of the resulting product (T-3) with a diameter of 1-2 μm.
The sample K-2 exhibits well adsorption capacity for MO, which is probably contributed to the structure of microflower possessing relative large surface area [14].
Online since: December 2013
Authors: Lothar A. Heinrich, Betina Pajaziti, Rakhimdzhan Roziev
Structure of the inclusion complex Cyclic oligosaccharides such as cyclodextrins (CD) are well known since decades and have been approved as useful pharmaceutical excipients.
Their molecular structure provides a hydrophilic exterior surface and a non polar cavity interior.
The vicinal cycloaliphatic structures are partially out of plane, and the phenyl rest is strongly angled.
Figure 1: Molecular structure (A) of POSX, and its steric conformation (B) calculated from XRD measurements [5] Beta-CD provides a rather low water solubility of 18 mg/mL.
Figure 2: Fluorescence displacement titration (A), the resulting stoichiometry and most probable structure of the POSX-HPCD inclusion complex (B) The POSX-HPCD in Fig. 2 B is not verified yet and should serve a working hypothesis.
Online since: March 2018
Authors: Wei Liu, Guo Tai Li, Jian Xin Zhou, Feng Zhang
Disaster prevention and mitigation capacity of engineering structure and construction waste recycling is getting more and more government attention.
It is expected in engineering area that the construction materials should possess better shock resistant and earthquake resistant capacity to provide security for the ability of engineering structures to withstand disasters.
As most widely-used building material in infrastructure construction, concrete has been the carrier of people’s expectation for structure’s performance.
When the mixture meets water, polymer will turn into emulsion and during the hardening process of concrete the emulsion is dehydrated to solid polymer structure in this way to impact the inside structure of concrete to improve its performance.
There are many sludge and impurities, which will adversely affect the adhesive property of the cement and aggregate. (2) When the polymer is added into the concrete, the coagulation during the process will cause adhesive films through physics-chemistry reactions.
Online since: April 2013
Authors: Zainovia Lockman, Saifollah Abdullah, Ahmad Fauzi Mohd Noor, Mohd Muzamir Mahat, Nur Aimi Jani, Mohd Faizal Achoi
Nevertheless, TiO2 is favorable choice of catalyst due to its unique properties which have anatase phase structure with optical band gap energy is 3.25 eV [5].
(2) This complex formation leads to the breakdown of the oxide layer with forming randomly distributed pits and etching at these pits to form the nanotubular structure in the presence of F- ions.
Narayanan et al. was found that the changes of voltage results in the morphological changes from flat or compact structure to nanotubular structure [12].
The formation of TiO2 nanotubes were formed through three processes; 1) TiO2 passive layer formation as shown in Eq. (1), 2) Formation of pits and 3) Growth of pits to form pores and nanotubular structure as shown in Eq. (2).
Johnson, Photo-catalysis using titanium dioxide nanotube layers, Journal of Photochemistry and Photobiology A: Chemistry 199 (2008) 250-254