Search results

Covalent Binding of CdSe@PMMA Nanocomposite Films with Both Good Transparency and UV-shielding Xiaolin Guan1, a, Hongting Fan1, b , Donghai Zhang1, c, Yang Zhang1, d, Tianming Jia1, e and Shoujun Lai1, f * 1Key Laboratory of Eco-Environment-Related Polymer Materials Ministry of Education, Key Laboratory of Polymer Materials Ministry of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Gansu 730070, P.R.
Nanocomposite is investigated by respective analytical techniques to confirm structure and performance.
In the XRD patterns (Fig. 5), the position of the diffraction peaks of CdSe-azo nanocrystals at 25.4o , 43o and 49o match to the (111), (220) and (311) crystalline planes of CdSe and these peaks could be indexed to cubic CdSe, which are consistent with the literature data of (JCPDS, 19-0191), indicating that the as-prepared CdSe-azo nanocrystals belong to the cubic zinc blende structure and maintain the crystalline structural of CdSe QDs.
Boon, Self-assembled InAs/InP quantum dots and quantum dashes: Material structures and devices, Progress in Quantum Electronics 38 (2014) 237–313
Lin, Quantum dots-enhanced chemiluminescence: Mechanism and application, Coordination Chemistry Reviews 263–264 (2014) 86–100

Designing Sustainable Equipment for Treating Gray School Waters for Irrigation and Food Growing Ricardo Victoria Uribe1, a *, Ricardo Victoria León2, b, Arturo Santamaría Ortega1, c and Miguel Ángel Rubio Toledo1, d 1School of Architecture & Design, Universidad Autónoma del Estado de México, Toluca, México 2School of Chemistry, Universidad Autónoma del Estado de México, Toluca, México asustentabledi@gmail.com, brvictoria11@hotmail.com, carturo_santamaria@hotmail.com, dmiguelblond72@yahoo.com.mx Keywords: Water recycling, Sustainability, Electro-flocculation, Waste water management Abstract.
It presents the local problems that gave origin to the project as well as the development and structure of the system developed for such project.

., 8 3Institute of Chemistry of Far Eastern Branch of Russian Academy of Sciences, 690022, Russia, Vladivostok, Prospect 100-letiya Vladivostoka, 159 adima.prsk@mail.ru ,bssgolik@gmail.com, c alexeyche88@gmail.com, dipost@chem.dvgu.ru eyury.shchipunov@googlemail.com, fkulchin@iacp.dvo.ru Keywords: ultrashort pulses, supercontinuum generation, sol–gel, gold nanoparticles, organic–inorganic nanocomposite, photonic material Abstract.
The strong nonlinear optical properties of these nanocomposite structures have been revealed in spectral characteristics of transmitted ultrashort pulses.

It was found that lead tungstate occupies an exceptional position in the family of tungstates with a scheelite structure.
Ministry of Education and Science, Dagestan State Pedagogical University, Research Institute of General and Inorganic Chemistry, 2012, pp. 187-188

Like In2Te3 the Hg3In2Te6 crystal has cubic crystal lattice with stoichiometric vacancies in their crystal structure.
Crystal lattice structure was studied by X-ray Debye-Scherrer method at Fe-Kα radiation with l = 1.94 Ǻ wavelength using the scheme of backward shooting.
Based on these data we can propose a band model structure similar for all compositions of investigated crystals.
Note that the voltage drop across the series resistance (RS) of the bulk part of the diode structure takes place at relatively large forward currents.
Dmitriev, Chemistry and Physics of Compounds with Loose Crystal Structure, Harwood Acad.

The composites are made from natural rubber (polyisoprene) as matrix material and high structure carbon black as electro-conductive filler.
Electrical resistance increase mechanism in the composite advances with the composite structure development during vulcanization.
The composites are made from natural rubber (polyisoprene; MARDEC, Inc.) as matrix material and high structure carbon black (HSCB; PRINTEX XE2; DEGUSSA AG; particle size 30 nm; specific surface area 950 m2/g) as electro-conductive filler.
Teteris, “Polyisoprene and high structure carbon nanoparticle composite for sensing organic solvent vapours,” Sensors Actuators B Chem., vol. 126, no. 1, pp. 209–213, Sep. 2007, doi: 10.1016/J.SNB.2006.11.049
Malefan, “Development of percolative electroconductive structure in piezoresistive polyisoprene-nanostructured carbon composite during vulcanization,” Mater.

Urea Reactor Explosion Accident Stress Corrosion Analysis Zhonghe Chen1,a, Weiqiang Wang2,b, Mingda Song2,c ,Ningning Dong1,a 1School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China; 2School of Mech.
Therefore, we try to carry on the analysis and research to the accident,tofind out the explosion reasons, operating process, urea reactor structure and other the correlation questions, will provide the model for the next similar accident prevention.
This reactor design pressure is 21.57MPa, the design temperature is 195℃, operating temperature is 188±2℃, actuating medium is urea solution and ammonium carbamate [1,2] Multilayer dressing for the reactor structure is made of 10 cylindrical segment and the upper and lower head components.
Multilayer structure is the cylinder, lining layer, blind lamellar, and 11-bandaging laminates.
The structural conditions caused stress corrosion Traditional steam leak detection hole structure was designed by hand welding methods to prevent the leak detection steam leaking to laminates [2].In order to overcome inter-deep hole and laminates difficult to detect and weld, the screw joint connection way between leak detection pipe and 16MnR laminates were used, but it is difficult to guarantee seal reliability under the vibration loads and wind loads，this makes ammonia leakage detection media and the detection steam easily into the laminates, the appearance of vent hole exudation had proven the detection steam divulges to various laminates [6].

., 30-059 Krakow, Poland 2 Department of Advanced Materials and Technologies, Faculty of Advanced Technologies and Chemistry, Military University of Technology, Gen.
It has been found that despite of applied working parameters, metals and alloys processed by the KoBo method are characterized by a homogenous, finegrained structure.
These “gentle” conditions of conducted deformation favor an activation of dynamical processes of a structure restoration (namely a dynamical recovery) [11].
Therefore, it may be stated that both the KoBo extrusion and the DSR method involve a similar mechanism of the structure refinement based on a dynamical structure restoration phenomena supported by a heat generation upon a processing.
Maier, A new method for determining dynamic grain structure evolution during hot aluminum extrusion.

To investigate the chemical constituents from the Plumbago zeylanica L. the chemical constituents were isolated by various column chromatographic methods and their structures were elucidated as plumbazeylanone(1), plumbagic acid(2), β-sitosterol(3), lupeol(4), lup-20(29)-en-3, 21-dione(5), norcanelilline(6), 3-O-glucopyranosyl plumbagicacid methylester(7), uridine(8), daucosterol(9).Compound 4-6 and 8 were first time were isolated from this plant for the first time.
HH1543) of this collection has been deposited at Department of Chemistry, HongHe University, YunNan China .

Electrosyntheses of Poly (selenophene-co-3-methylthiophene) with Improved Thermoelectric Property in Boron Trifluoride Diethyl Etherate Sheng-Tao WANG1, Bao-Yang LU2, Jing-Kun XU1,* and Wei-Qiang ZHOU1 1Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, China 2School of Pharmacy, Jiangxi Science and Technology Normal University, Nanchang 330013, China *Corresponding author: xujingkun@tsinghua.org.cn; Tel.: +86-791-88537967; fax: +86-791-83823320 Keywords: Conducting polymers, Electrochemical copolymerization, Poly(3-methylthiophene); Polyselenophene, Thermoelectric property Abstract.
The structures of as-prepared copolymers were characterized by UV-vis and infrared spectroscopy.