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Wang K.,Changchun University of Science and Technology | Wang K.,CAS Changchun Institute of Applied Chemistry | Tao Z.-H.,Jilin Province Design and Research Institute for Petrochemical Engineering | Xu L.,Changchun University of Science and Technology | Liu Y.-Q.,CAS Changchun Institute of Applied Chemistry
Fenxi Huaxue/ Chinese Journal of Analytical Chemistry | Year: 2014

In recent years, aptamer-based biosensors have been quickly developed due to its characteristic such as high sensitivity & selectivity, excellent stability and extensive application in various fields. According to different principles various aptamer biosensors have been designed. In this review, we mainly focused on the development of electrochemical, fluorescent and colorimetric aptamer sensors. The potential development of aptamer-based biosensors has also been discussed. © 2014, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences. Published by Elsevier Limited. All rights reserved. Source


Yang X.-Y.,Changchun University of Science and Technology | Dang D.-D.,Changchun University of Science and Technology | Zhu W.,Changchun University of Science and Technology | Xie W.-B.,CAS Changchun Institute of Applied Chemistry | And 4 more authors.
Asian Journal of Chemistry | Year: 2014

To obtain a new solid phase time-resolved fluorescence immunoassay bifunctional chelate, a new intermediate compound, 4'-di(paminophenylethynyl)- 6,6'-bis[N,N-bis(t-butoxycarbonylmethyl)amino methyl]-2,2'-bipyridine was synthesized using 4,4'-dinitro-2,2'- bipyridine-6,6'-dimethyl bis(trifluoroacetate) as the initial material by four steps viz., hydrolyzation, bromination, esterification and substitution. The structure of the compound was charactered by IR, 1H NMR and HRMS. Source


Zhu S.,Beijing University of Chemical Technology | Bao Y.-Y.,Beijing University of Chemical Technology | Chen L.,Beijing University of Chemical Technology | Gao Z.-M.,Beijing University of Chemical Technology | Wang D.-S.,Jilin Province Design and Research Institute for Petrochemical Engineering
Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities | Year: 2011

In a multi-impeller stirred tank with 0.48 m diameter, the local bubble size distributions (BSD) in the sparged air-water system were measured at 24°C and 81°C by using the dual electric conductivity probe. The agitators including a hollow blade dispersing turbine below and two down-pumping or up-pumping hydrofoils above were identified as HEDT+2WH D and HEDT+2WH U, respectively. Both the calibration method and reconstruction model were used to convert the measured bubble chord length to the bubble size. The results show that the bubble sizes of using HEDT+2WH U are larger than those of HEDT+2WH D, and the difference is obvious in the regions near the bottom impeller and above the top impeller. The average bubble size of using HEDT+2WH U is 1.13 times of that of using HEDT+2WH D. The BSD measured at 81°C is similar as that measured at room temperature 24°C, but the average Sauter bubble size measured in hot system by using HEDT+2WH U is about 29% greater than that measured in cold system; and when using HEDT+2WH D, the average Sauter bubble size measured in hot system is about 26% greater than that measured in cold system. The measured bubble size values are in good agreement with those predicted by using the correlation published in literature. Source


Wang K.,Changchun University of Technology | Wang K.,Jilin Province Design and Research Institute for Petrochemical Engineering | Li G.,Changchun University of Technology | Li N.,Changchun University of Technology | And 2 more authors.
ICAFPM 2011 - Proceedings of 2011 International Conference on Advanced Fibers and Polymer Materials | Year: 2011

The hybrid nanocomposite of polyaniline with better conductivity properties was synthesised by using Keggin structure nickel-substituted heteropolysilicotungstate K6(SiW11NiO40H 2)·15H2O as doping agent in microemulsion. The structure and morphology of materials were characterized by XRD, IR, UV-vis and TEM; the conductivity was examined by resistance tester. The characterization results showed that the polyaniline was doped by the insertion of heteropoly anion into molecular chains?Cobtaining spherical nano composite particle with better dispersion and its particle size between 10-60 nm; the conductivity of nanocomposite was 5.41×10-1 S/cm at room temperature. Source


Tao Z.,Jilin Province Design and Research Institute for Petrochemical Engineering | Qin Y.,Changchun University of Science and Technology | Liu Y.,CAS Changchun Institute of Applied Chemistry | Xu L.,Changchun University of Science and Technology | Wang E.,CAS Changchun Institute of Applied Chemistry
Chinese Journal of Chemistry | Year: 2013

A simple-structured 4-(2-pyridylazo)resorcinol (PAR) system presents interesting properties with dual fluorescent outputs. Modulated by solution pH two kinds of reversible switch behaviors, "ON-OFF" and "OFF-ON", were realized with the PAR system. Stimulated by different combination of external stimulus, such as metal ions, UV irradiation and solution pH, the PAR system could perform multiple logic functions including three inputs AND, two inputs INHIBIT and combinatorial "NOR/AND" in parallel. The operation of the designed system is very simple and detected with a high sensitive fluorescent signal. Copyright © 2013 SIOC, CAS, Shanghai & WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source

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