Search results

Hydration Behaviour of Sufonated Polyetheretherketone (SPEEK) Membranes Kaspars Veldrea, Elīna Sala, Elīna Āboltiņa and Guntars Vaivarsb University of Latvia, Faculty of Chemistry, Jelgavas 1, Riga, LV-1004, Latvia akaspars.veldre@inbox.lv, bGuntars.Vaivars@cfi.lu.lv Keywords: PEM, SPEEK, ionic liquids, hydration/dehydration, water sorption/desorption Abstract.
Changes in wet conditions reversible The membrane loses IL, and irreversible changes of membrane structure are observed.
Hydration of a very dry (kept at 0% RH) membrane is described by three-dimensional diffusion model (D3), while hydration of a membrane kept under ambient conditions is best described by two-dimensional phase boundary model (R2) which corresponds to water sorption on a surface as channels in a membrane structure already contain water, but in a very dry membrane there is no water in these channels, and water should diffuse into membrane.

Amino-functionalized Multiwalled Carbon Nanotubes for the Preparation of Electroactive Polyurea Composites with Improved Electrical Properties Lu-Chen Yeh a, Tsao-Cheng Huangb and Jui-Ming Yeh *,c Department of Chemistry, Chung Yuan Christian University, Chung Li, Taiwan, 32023, R.
Introduction Oligoanilines exhibit higher solubility in common solvents as compared with PANIs and can be isolated in highly pure forms with well-defined molecular structures.
The chemical structure of the oligoaniline was determined by 1H-NMR spectroscopy on a Bruker 400 spectrometer, using deuterated dimethyl sulfoxide (d6-DMSO) as the solvent.

For the Sample A1 of low growth rate , two diffraction peaks locating at 38.9° and 59.9° are assigned to ε-Ga2O3 (004) and (006) planes.[12] As is pointed out by previous researcher, ε-Ga2O3 possesses hexagonal lattice structure,[13] which may result in the hexagonal grains observed in Fig. 1(b).
At the first two stage, high flow rates of TEGa favors polycrystalline structure with a 3D growth mode and it can relax lattice strain to promote the film coalescence.[16] Also, AFM measurements were used to further explore the growth mode of the Ga2O3 films.
Walton, Chemistry 19(8) (2013) 2803-13

P-Type Molecular Sieve Antibacterial Agent and Hydrothermal Control Shasha Gao1,a, Xiuli Wang2,b, Yinchang Pei1,c, Xiangjian Meng1,d, Nanchun Chen1,e 1School of Material Science and Engineering, Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education,Guilin University of Technology, Guilin 541004, China 2School of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China a1137397689@qq.com, b610064853@qq.com, c1090157660@qq.com, d1249844819@qq.com, ecnc@glut.edu.cn(Corresponding Author) Keywords: P-type molecular sieve; Hydrothermal control; Temperature; Time Abstract.
The characteristic absorption peak at 1000 cm-1 is mainly due to the structure of the silicon tetrahedron about Si-O-Si.
In Situ Preparation and Structure of Zeolites A,X and P.

Introduction Wrought magnesium alloys have attracted great interest recently due to their potential to produce significant weight savings in vehicle structures.
Future lightweight vehicles, such as that envisaged by the SuperLight car concept [1], include a significant contribution from magnesium sheet or extrusion as part of a multi-material body structure.
It is thus unlikely this approach can completely eliminate asymmetry in conventional wrought magnesium alloys without major changes to alloy chemistry or processing.

In recent years, some low-temperature synthetic routes of obtaining cobaltite have been reported, such as sol-gel route [7], ultrasonic assisted synthesis [8-9], hydrothermal assisted method [10-12], deposition [6,13] and microwave assisted synthesis [16-19].The microwave synthesis has been undertaken as an alternative to many soft-chemistry routes for its advantages of fast reaction and readily obtaining uniform, fine microstructure.
In this paper, nanoscale lanthanum cobaltite (LCO-A) was obtained under microwave irradiation in mixtures containing Co(II) and La(III), and the structure was characterized and electrochemical properties were studied.
Results and discussion Crystal Structures.

For example, Wilson Ncode tennis racket is filled with nano-sized SiO2 into the hole by the carbon fiber, so that the material structure becomes more uniformity, high strength, firm.
In 2010, The Zurich Institute of physical chemistry in Swiss University in Shanghai Expo developed nano-waterproof cloth attracts people’s attention.
The antibacterial mechanism, using nano-micro volume structure silicon oxide carrier, assemble all the functional ion and molecular, such as inorganic silver, zinc plasma, in half hole sealing, and format a long-term broad-spectrum antibacterial which is with high surface nanophase material and nanophase molecular sieve composite formation, enough to make it the space surrounding the production of atomic oxygen, oxygen atom with strong oxidizing can kill bacteria.

Molecular Modeling and In Vitro Study of Malodor Inhibition Using Thai Herbal Products Sirilak Namwong1,a* and Natkamol Peungsamran2,b 1Department of Biotechnology, Faculty of Science and Technology, Suan Sunandha Rajabhat University, Bangkok, Thailand 2Department of chemistry, Faculty of Science and Technology, Suan Sunandha Rajabhat University, Bangkok, Thailand asirilak.na@ssru.ac.th, bnatkamol.pe@ssru.ac.th Keywords: Malodor, Cystathionine beta-lyase, Terminalia catappa L.
Forty-five inhibitors were selected based on the previous literature and their structures were retrieved from the PubChem database.
Inhibitor CID: Structure Binding affinity (kcal/mol) 1. 16109340 -7.5 2. 370 (T. catappa L

The system seems like a neural network in microscopic structure, whereas, in macroscopic structure and function, it is the domain rules of symbolic inference.
Journal of Materials Chemistry, 2008, vol.18, pp.306-312.

These droplets achieve a high degree of undercooling and then solidify instantaneously resulting in a featureless aluminum structure at this scale as shown in Fig. 2B.
Both of the Al2O3 crystal structures have large lattice disregistry with all phases.
Weast: CRC Handbook of Chemistry and Physics 65 th Edition (CRC Presses Inc., USA 1984).