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Träfflista för sökning "WFRF:(Fang Yue) ;lar1:(su)"

Sökning: WFRF:(Fang Yue) > Stockholms universitet

  • Resultat 1-7 av 7
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  • Ai, Yue-Jie, 1982-, et al. (författare)
  • Repair of DNA Dewar Photoproduct to (6-4) photoproduct in (6-4) Photolyase
  • 2011
  • Ingår i: Journal of Physical Chemistry B. - : American Chemical Society (ACS). - 1520-6106 .- 1520-5207. ; 115:37, s. 10976-10982
  • Tidskriftsartikel (refereegranskat)abstract
    • Dewar photoproduct (Dewar PP) is the valence isomer of (6-4) photoproduct ((6-4)PP) in photodamaged DNA. Compared to the extensive studied CPD photoproducts, the underlying repair mechanisms for the (6-4)PP, and especially for the Dewar PP, are not well-established to date. In this paper, the repair mechanism of DNA Dewar photoproduct T(dew)C in (6-4) photolyase was elucidated using hybrid density functional theory. Our results showed that, during the repair process, the T(dew)C has to isomerize to T(6-4)C photolesion first via direct C6'-N3' bond cleavage facilitated by electron injection. This isomerization mechanism is energetically much more efficient than other possible rearrangement pathways. The calculations provide a theoretical interpretation to recent experimental observations.
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  • Ai, Yue-Jie, et al. (författare)
  • Theoretical Studies on Photoisomerizations of (6-4) and Dewar Photolesions in DNA
  • 2010
  • Ingår i: Journal of Physical Chemistry B. - : American Chemical Society (ACS). - 1520-6106 .- 1520-5207. ; 114:44, s. 14096-14102
  • Tidskriftsartikel (refereegranskat)abstract
    • The (6-4) photoproduct ((6-4) PP) is one of the main lesions in UV-induced DNA damage. The (6-4) PP and its valence isomer Dewar photoproduct (Dewar PP) can have a great threat of mutation and cancer but gained much less attention to date. In this study, with density functional theory (DFT) and the complete active space self-consistent field (CASSCF) methods, the photoisomerization processes between the (6-4) PP and the Dewar PP in the gas phase, the aqueous solution, and the photolyase have been carefully examined. Noticeably, the solvent effect is treated with the CASPT2//CASSCF/Amber (QM/MM) method. Our calculations show that the conical intersection (Cl) points play a crucial role in the photoisomerization reaction between the (6-4) PP and the Dewar PP in the gas and the aqueous solution. The ultrafast internal conversion between the S-2 ((1)pi pi*) and the So states via a distorted intersection point is found to be responsible for the formation of the Dewar PP lesion at 313 nm, as observed experimentally. For the reversed isomeric process, two channels involving the "dark" excited states have been identified. In addition to the above passages, in the photolyase, a new electron-injection isomerization process as an efficient way for the photorepair of the Dewar PP is revealed.
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5.
  • Wang, Jianmin, et al. (författare)
  • Experimental Study on Abstract Expression of Human-Robot Emotional Communication
  • 2021
  • Ingår i: Symmetry. - : MDPI AG. - 2073-8994. ; 13:9
  • Tidskriftsartikel (refereegranskat)abstract
    • With the continuous development of intelligent product interaction technology, the facial expression design of virtual images on the interactive interface of intelligent products has become an important research topic. Based on the current research on facial expression design of existing intelligent products, we symmetrically mapped the PAD (pleasure-arousal-dominance) emotion value to the image design, explored the characteristics of abstract expressions and the principles of expression design, and evaluated them experimentally. In this study, the experiment of PAD scores was conducted on the emotion expression design of abstract expressions, and the data results were analyzed to iterate the expression design. The experimental results show that PAD values can effectively guide designers in expression design. Meanwhile, the efficiency and recognition accuracy of human communication with abstract expression design can be improved by facial auxiliary elements and eyebrows.
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  • Xie, Yukun, et al. (författare)
  • Behavioral Indicators Affecting Driving Performance in Human Machine Interface Assessments with Simulation
  • 2021
  • Ingår i: Advances in Human Aspects of Transportation. - Cham : Springer. - 9783030800116 ; , s. 246-252
  • Konferensbidrag (refereegranskat)abstract
    • Human-machine interface (HMI) is valued as a medium for information interaction between the digital cockpit and the driver, and simulated driving evaluation is an important method for assessing in-vehicle HMI. It is worth exploring how to select appropriate behavioral indicators for evaluation analysis and design iterations. The study selected six secondary tasks for HMI evaluation using touch screen interaction under a constant speed straight road driving scenario. Vehicle indicators including vertical and horizontal control and behavioral indicators related to the secondary tasks were collected. By performing stepwise regression analysis on the data from 26 participants, some behavioral indicators that have an impact on driving performance were extracted to provide suggestions for the simulation experimental evaluation and HMI design optimization iterations.
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7.
  • Zhou, Fang, et al. (författare)
  • A New Red-Emitting Fluorescence Probe for Rapid and Effective Visualization of Bisulfite in Food Samples and Live Animals
  • 2019
  • Ingår i: Journal of Agricultural and Food Chemistry. - : American Chemical Society (ACS). - 0021-8561 .- 1520-5118. ; 67:15, s. 4375-4383
  • Tidskriftsartikel (refereegranskat)abstract
    • The development of new methods for rapid and effective detection of bisulfite (HSO3-) in food samples and imaging of HSO3- intake in animals is of significant importance due to the key roles of HSO3- in food quality assurance and community health. In this work, a new responsive fluorescence probe, EQC, is reported for the quantitative detection of HSO3- in food samples and visualization of HSO3- intake in animals. Upon addition of HSO3-, the UV-vis absorption and red emission of EQC were significantly decreased within 120 s. The changes in absorption and emission spectra of EQC were rationalized by theoretical computations. The proposed reaction mechanism of EQC with HSO3- was confirmed by high-resolution mass spectrometry (HRMS) and spectroscopic titration measurements. EQC has the advantages of high sensitivity, selectivity (a detection limit of 18.1 nM), and fast response toward HSO3-, which enable rapid and effective HSO3- detection in buffer solution. The practical applications of EQC were demonstrated by the detection of HSO3- in food samples and the imaging of HSO3- intake in live animals.
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  • Resultat 1-7 av 7

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