Chenglong Wang

Lanzhou Jiaotong University, Kao-lan-hsien, Gansu Sheng, China

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Publications (8)9.8 Total impact

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    ABSTRACT: The origination of the peak at 730 nm in the delayed fluorescence (DF) spectrum of chloroplasts was studied using various optical analysis methods. The DF spectrum showed that the main emission peak was at about 685 nm, with a small shoulder at 730 nm when the chloroplast concentration was < 7.8 microg/mL. The intensity of the peak at 685 nm decreased, while the intensity of the peak at 730 nm increased, when the chloroplast concentrations were increased from 7.8 to 31.2 microg/mL. With the concentration increasing, the peak at 730 nm became dominant while the peak at 685 nm finally disappeared. The DF decay kinetic curves showed that the intensity of the peak at 730 nm decayed as the same speed as the intensity of the peak at 685 nm during the entire relaxation process (0.5-30.5 s). With the excitation wavelength at 685 nm, the emission intensity was stronger in the excitation spectrum at 730 nm. The absorption spectrum demonstrated that the ratio A(685):A(730) remained almost constant when the chloroplast concentration increased. The results suggest that the peak at 730 nm appearing in DF is mainly contributed by the fluorescence of photosystem I (PSI), generated by the re-absorption of 685 nm band DF.
    Luminescence 07/2007; 22(4):387-92. DOI:10.1002/bio.978 · 1.68 Impact Factor
  • Chenglong Wang, Duowang Fan, Hongzhong Liu
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    ABSTRACT: A soft imprint lithography (IL) process is presented to fabricate the pixel array pattern for organic light-emitting diodes. In this study, we successfully fabricate the OLED pixel array of sizes from 50 mum to 5 mum.
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    ABSTRACT: TiN films growing, Ti films as interlayers were prepared on AZ91C by CMP equipment. Surface topography, microstructure and hardness of the films were analyzed with high resolution SEM, X-ray EDS and CSM microcharacter hardness tester.
    Nano-Optoelectronics Workshop, 2007. i-NOW '07. International; 01/2007
  • Na Leng, Duowang Fan, Chenglong Wang, Hongzhong Liu
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    ABSTRACT: The article elaborates a set of large-scale automation equipment, which is applicable to the reflector thin deposition of automobile illumination according to the work of our laboratory, and its experimental results are also introduced.
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    ABSTRACT: Effects of artificial acid rain and SO2 on characteristics of DLE were studied. Results reveal that the changes in DLE intensity may provide a new approach for the detection of environmental pollution.
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    ABSTRACT: TiO films were prepared by custom-made Cathode Multi Arc Ion equipment. Experimental test results reveal that our equipment can easly deposite big area scale TIO, particle size is in nanometer scale .
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    ABSTRACT: The structure and function of chloroplast in plant leaves can be affected by acid rain and air pollution. The photosystem II in a plant is considered the primary site where light-induced delayed light emission (DLE) is produced. With the lamina of zijinghua (Bauhinia variegata L.) and soybean (Glycine max (L.) Merr.) as testing models, we studied the effects of artificial acid rain and SO2 on characteristics of DLE by using a home-made weak luminescence detection system. The results show that the changes in DLE intensity of green plants can reflect the changes in chloroplast intactness and function. With proper calibration, DLE may provide an alternative means of evaluating environmental acid stress on plants. The changes in DLE intensity may provide a new approach for the detection of environmental pollution and its impact on the ecosystem.
    Luminescence 01/2005; 20(1):51-6. DOI:10.1002/bio.806 · 1.68 Impact Factor
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    Chenglong Wang, Da Xing, Qun Chen
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    ABSTRACT: Photosynthesis is the most important chemical reaction in the world. The measurement of plant photosynthesis rate plays an important role in agriculture. Light-induced delayed fluorescence (DF) in plants is an intrinsic label of the efficiency of charge separation at P680 in photosystem II (PS II). In this paper, we have developed a biosensor that can accurately measure the plant photosynthesis ability by means of DF. Compared with common methods for measuring the photosynthesis rate based on consumption of CO2, the proposed technique can quantify the plant photosynthesis ability with less influence of the environment. The biosensor is an all-weather measuring instrument, it has its own illumination power and utilizes intrinsic DF as the measurement marker. The current investigation has revealed that, there is a good correspondence between the results measured by the biosensor and that by commercially available portable photosynthesis system under controlled conditions. We thus conclude that DF is an excellent marker for evaluating plant photosynthesis ability under its biological status with less interferences of the environment.
    Biosensors & Bioelectronics 11/2004; 20(3):454-9. DOI:10.1016/j.bios.2004.03.031 · 6.45 Impact Factor

Publication Stats

47 Citations
9.80 Total Impact Points

Institutions

  • 2007
    • Lanzhou Jiaotong University
      Kao-lan-hsien, Gansu Sheng, China
  • 2004–2007
    • South China Normal University
      • Institute of Laser Life Science
      Shengcheng, Guangdong, China