Search results

In actual situation, concrete structures always suffer from the coupled effects of multifactor such as wet-dry cycle and sulfate attack when exposed to tidal area or groundwater level change environment.
Introduction Sulfate attack is one of the most aggressive environments that affect the durability of concrete structures.
In actual situation, concrete structures always suffer from the coupled effects of multifactor such as wet-dry cycle and sulfate attack when exposed to tidal area or groundwater level change environment.
VIVID-500 produced by Shanghai Sunrise Chemistry Co., Ltd. was used as retarding superplasticizer.
According to these SEM micrographs, although sulfate attack may cause the growth of mass in the short term, yet there was still significant damage to internal structure.

As shown in Fig.4a, an obvious network structure of the intermetallic β-Mg17Al12 phase was detected by SEM and its size is over 50μm.
It’s clear that the shape of β-Mg17Al12 phase has been refined into small block structure and its size decreases to less than 10μm.
The structure of ZrB2(a=0.3169nm,c=0.3530nm) and α-Mg(a=0.3203nm,c=0.5200nm) are both hexagonal, according to the disregistry model of two-dimensional lattices proposed by Bramfitt [10], the disregistry between the low index planes of them can be calculated.
A237(1997),p.12 [9] X.T.Wang,L.M.Hu,D.Gu,Y.Hu: Chemistry.Vol.5(1995),p.13 [10] B.L.

Introduction Engineering structures strengthened by FRP is a new technique which synthesizes the civil engineering and high-performance materials engineering in recent years.
The advantages of strengthening technology of pasted by FRP exterior are superb mechanical properties, well chemistry stability, easy and fast to construct and can be decorated easily.
[3] Design code for strengthening concrete structure (GB 50367-2006), China architecture and building press, Beijing, 2006
[4] Technical specification for strengthening concrete structures with carbon fiber reinforce polymer laminate (CECS 146: 2003),China planning press, Beijing, 2007.

Overall structure of the motor control system Sewage detection system design based on large-scale embedded microcontroller is shown as Fig 1.
It has features of high processing speed, scalability, with easy expansion, high reliability, low power, simple structure, strong interrupt handling capability, etc.
Although hardware configuration has been simplified to a large extent, the speed and performance has been improved to a great extent. 4 Conclusion With the continuous development of control technology, the chip performance gradually improved through simple hardware structure to implement complex control functions, relative to other motor control systems.
Analytical methodologies for determining the occurrence of endocrine disrupting chemicals in sewage treatment plants and natural waters[J].Analytial Chemistry,2004,(01):79-88

Wettability-Based Colorimetric Test Strips for Gasoline/Oil Mixture Differentiation Shuang Qiua, Michael Chung Kay Wongb and Paul Chi Hang Lic 1Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC Canada aqs0101@gmail.com, bmichaelw@sfu.ca, cpaulli@sfu.ca Keywords: Inverse Opal Film, Nanopores, Silane, Wettability, Gasoline, Oil.
It has been reported that the inverse opal film (IOF) produce an iridescence color or structural color [2, 3], and this is caused by the presence of the nanopores in the IOF’s porous structure.
The porous structure results in a color, but the color disappears when the nanopores are wetted by a liquid that could infiltrate into the porous structure of the IOF.

The purpose of this study was to clarify the structure and relative atomic concentration in passive layer of Cu-bearing stainless steel, therefore to help people get better understanding of the mechanism of antibacterial property of the this kind of material. 2.
The experiment was entrusted by the Center for Antibacterial Analysis of Technical Institute of Physics and Chemistry CAS.
� � � � � � � 3.2 XPS observation From the XPS survey spectra of the specimens, the structure and relative atomic concentration of chromium, iron and copper in the passive layer were identified [9-11].
[10] Wu G: Characterization and Application for Materials Structure (Chemical Industry Publication, China 2002)

Preparation and Properties of Enzymatic Hydrolysis Lignin Modified Thermoplastic Starch Composites Bin Liu 1, a, Qiufeng Lv*1, b, Run Fang2, c and Xiansu Cheng* 1, d 1College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, China 2Department of Chemistry and Chemical Engineering, Minjiang University, Fuzhou 350108, China a39547060@163.com, bqiufenglv@163.com, creadfun@gmail.com, d chengxiansu@fzu.edu.cn Keywords: Enzymatic hydrolysis lignin, Thermoplastic starch, Composites.
This is because EHL has a three dimensional structure with strong hydrogen bonding between the intermolecular and intramolecular [12].
It was found that the crystal structure of native starch was almost destroyed by plasticizer, just a few granules structure were present in the continuous phase.

Deposition of Bone-like Apatite Layers on the Surface of Poly(L-Lactic Acid) Using Immobilized Urease Hidero Unuma1 and Akihiro Ito 2 1 Department of Chemistry and Chemical Engineering, Faculty of Engineering, Yamagata University 2 Graduate School of Science and Engineering, Yamagata University 1, 2 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan email: unuma@yz.yamagata-u.ac.jp Keywords: Apatite, Scaffold, Poly(L-Lactic Acid), Urease, Tissue Engineering Abstract.
The FT-IR absorption bands around 1450 and 880 cm-1 indicate that carbonate ion is incorporated in both phosphate and hydroxyl sites in the apatite structure [15].
Assuming that the precipitate on the outer surface is identical to that on the inner surface of the specimens, we can conclude that the precipitate is bone-like apatite because it has low crystallinity, contains carbonate ion in the structure and has a calcium-deficient composition.
The precipitate was characterized to be bone-like apatite with low crystallinity, carbonate ion in the structure and calcium-deficient composition.

Electrochemical and Thermal Behavior of Carbon Anodes for Lithium Cells Shin-ichi Tobishima, Hideyuki Morimoto, Yusuke Ohno, Yoko Kimura and Yumi Kashiwazaki Department of Chemistry, Faculty of Engineering, Gunma University, 1-5-1 Tenjincho, Kiryu, Gunma, 376-8515, Japan Keywords: lithium cell, carbon, anode, safety.
Natural graphite (nG) has a complete graphite structure and has lithium ion intercalation sites in the graphite layers.
However, cG has not only graphite layers but also a randomly structured void, which captures lithium ions.
With cG, the irregular carbon structure becomes an obstacle for lithium ion migration.

., Hardness, elastic modulus, and structure of very hard carbon films produced by cathodic.
[12] higang Xin, L.S., Ronggen Zhao, Xingfan Hu, Influence of cathodic current on composition, structure and properties of Al2O3 coatings on aluminum alloy prepared by micro-arc oxidation process.
Zhaoa, Effects of cathodic voltages on the structure and properties of ceramic coatings formed on NiTi alloy by micro-arc oxidation.
Materials Chemistry and Physics, 121(2010) 172-177