Xinping Zeng

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Suspension quantitative germicidal test showed that electrolyzed oxidizing water (EO water) was an efficient and rapid disinfectant. Disinfection rates towards E. coli (available chlorine concentration ACC: 12.40 mg/L) and Staphylococcus aureus (ACC: 37.30 mg/L) could reach 100% at 1 and 3 min, respectively. Disinfection mechanism of EO water was(More)
In this paper, the anti-cancer drug 6-mercaptopurine (6-MP) was taken as the detection object. The biosensor of dsDNA/GNs/chit/GCE was established using the grapheme (GNs) and chitosan (chit) as the compound modified material. The electrochemical behavior of 6-MP on the sensor was discussed, and the damage and its mechanism of 6-MP on DNA were studied. The(More)
A novel glucose biosensor was fabricated. The first layer of the biosensor was polythionine, which was formed by the electrochemical polymerisation of the thionine monomer on a glassy carbon electrode. The remaining layers were coated with chitosan-MWCNTs, GOx, and the chitosan-PTFE film in sequence. The MWCNTs embedded in FAD were like "conductive wires"(More)
A new manganese-oxidizing strain FM-2 was screened out from biological activated carbon (BAC) filter column and was identified as Citrobacter freundii. The results of the systematic study on this species are as follows: At 27°C, the optimum pH for Citrobacter sp. FM-2 to remove manganese was 7.0-8.0.The best removal rate of manganese under 27°C, pH 7.0 by(More)
The fungicidal influencing factors of electrolyzed oxidizing water (EOW) on Candida albicans were investigated by suspension quantitative germicidal tests. Results showed that EOW possessed predominant fungicidal rate on C. albican, as high as consumately 100% after 0.5min duration of 65.5mg/L active available chlorine concentration (ACC). The fungicidal(More)
A dsDNA/PANI/CTS/GCE biosensor was constructed by using the biocompatible chitosan (CTS) and the polyaniline (PANI) with excellent electric catalytic properties and large specific surface areas. The electrochemical behavior of hydroquinone on biosensor and its DNA-damaging mechanisms were investigated. Results showed that the redox peak current was(More)
A subharmonic injection-locked oscillating antenna, operating simultaneously as a frequency doubler and as a QPSK modulator, is presented. A dual-gate MESFET is used with one of its gates integrated with a PIN diode switch controlled patch antenna and the other gate connected to a low-noise subharmonic stabilising signal. The experimental and simulation(More)
Polyaniline/active carbon (PANI) and nanometer-sized TiO2 (n-TiO2) were prepared by oxidation and sol-gel methods, respectively, and were then used as a zymophore to modify a glassy carbon electrode (GCE) and a GOx/n-TiO2/PANI/GCE sensor with a synergistic effect was established. A series of performance evaluations for the modified material and sensor was(More)
Various injection-locked oscillators such as oscillating active integrated antennas have been proposed. They normally presented high frequency stability and clean signal spectra as well as multi-functionality [1-3]. Normally, generating a stable high-frequency locking signal is more costly than generating a low frequency one. Therefore, a locking signal at(More)
Pure D/L-theanine enantiomers were synthesized separately, and SEM was used for their crystal-structure observation. The novel enantiomeric separating method by HPLC was established using the chiral selector of β-CD in the mobile phase. Green tea, white tea, oolong tea, black tea and Pu-erh tea were tested for theanine enantiomers by different degrees of(More)