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  1. Article ; Online: Mechanisms of chiral plasmonics-Scattering, absorption, and photoluminescence.

    Cheng, Yuqing / Sun, Mengtao

    The Journal of chemical physics

    2023  Volume 159, Issue 13

    Abstract: Chirality is a concept that one object is not superimposable on its mirror image by translation and rotation. In particular, chiral plasmonics have been widely investigated due to their excellent optical chiral properties, and have led to numerous ... ...

    Abstract Chirality is a concept that one object is not superimposable on its mirror image by translation and rotation. In particular, chiral plasmonics have been widely investigated due to their excellent optical chiral properties, and have led to numerous applications such as optical polarizing element etc. In this study, we develop a model based on the concept of the interaction between harmonic oscillators to investigate and explain the optical chiral mechanisms of strongly coupled metal nanoparticles (MNPs). The chirality of the scattering, absorption, and photoluminescence spectra are carefully discussed in detail. The results show that the chirality of the system originates not only from the orientations of the MNPs, but also from the different eigen parameters between them. Specifically, the derived three factors contribute to the chirality: the symmetry, the coupling strength, and the coherent superposition of the emitted electric field. This work provides a deeper understanding on the chiral plasmonics and may guide relevant applications in theory.
    Language English
    Publishing date 2023-10-24
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3113-6
    ISSN 1089-7690 ; 0021-9606
    ISSN (online) 1089-7690
    ISSN 0021-9606
    DOI 10.1063/5.0169313
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  2. Article ; Online: Preparation of ZnO-GO nanocomposites and their properties

    Jin Caifeng / Cheng Yuqing / Liu Wenbin / Lv Yuguang

    E3S Web of Conferences, Vol 341, p

    2022  Volume 01001

    Abstract: ZnO nanoparticles were prepared by hydrothermal method. The modified Hummer process was then used to prepare go. The ZnO-GO com posites were then mixed to produce different ratios of ZnO-GO, characteris ed and their photocatalytic properties were ... ...

    Abstract ZnO nanoparticles were prepared by hydrothermal method. The modified Hummer process was then used to prepare go. The ZnO-GO com posites were then mixed to produce different ratios of ZnO-GO, characteris ed and their photocatalytic properties were investigated using rhodamine B as the target degradation species. The results showed that the degradation r ates of rhodamine B were 41.96% and 84.42% for the nano-ZnO and ZnO-GO 7% composites, respectively, when illuminated with xenon light for 36 0 min. The improved photocatalytic activity of composite materials is prim arily due to the introduction of appropriate amount of GO, which could ra pidly capture and transfer to the photogenerated electrons, and could load more ZnO and prevent the agglomeration of ZnO particles, increasing the s pecific surface area of ZnO and its activation point, as well as increasing th e adsorption of pollutants on the ZnO surface and improving the photocatal ytic efficiency.
    Keywords namo-zno ; graphene oxide ; photocatalysis ; Environmental sciences ; GE1-350
    Language English
    Publishing date 2022-01-01T00:00:00Z
    Publisher EDP Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article: Early adenocarcinoma mixed with a neuroendocrine carcinoma component arising in the gastroesophageal junction: A case report.

    Cheng, Yu-Qing / Wang, Geng-Fang / Zhou, Xiao-Li / Lin, Min / Zhang, Xin-Wen / Huang, Qin

    World journal of gastrointestinal oncology

    2024  Volume 16, Issue 2, Page(s) 563–570

    Abstract: Background: Early adenocarcinoma mixed with a neuroendocrine carcinoma (NEC) component arising in the gastroesophageal junctional (GEJ) region is rare and even rarer in young patients. Here, we report such a case in a 29-year-old Chinese man.: Case ... ...

    Abstract Background: Early adenocarcinoma mixed with a neuroendocrine carcinoma (NEC) component arising in the gastroesophageal junctional (GEJ) region is rare and even rarer in young patients. Here, we report such a case in a 29-year-old Chinese man.
    Case summary: This patient presented to our hospital with a 3-mo history of dysphagia and regurgitation. Upper endoscopy revealed an elevated nodule in the distal esophagus 1.6 cm above the GEJ line, without Barrett's esophagus or involvement of the gastric cardia. The nodule was completely resected by endoscopic submucosal dissection (ESD). Pathological examination confirmed diagnosis of intramucosal adenocarcinoma mixed with an NEC component, measuring 1.5 cm. Immunohistochemically, both adenocarcinoma and NEC components were positive for P53 with a Ki67 index of 90%; NEC was positive for synaptophysin and chromogranin. Next-generation sequencing of 196 genes demonstrated a novel germline mutation of the
    Conclusion: Early adenocarcinoma with an NEC component arising in the distal esophageal side of the GEJ region showed evidence of gastric origin.
    Language English
    Publishing date 2024-02-29
    Publishing country China
    Document type Case Reports
    ZDB-ID 2573696-6
    ISSN 1948-5204
    ISSN 1948-5204
    DOI 10.4251/wjgo.v16.i2.563
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  4. Article ; Online: A prospective randomized trial comparing the pocket-creation method and conventional method of endoscopic submucosal dissection in early gastric cancers and precancerous lesions.

    Wu, Jiajia / Li, Siyu / Fan, Li / Cheng, Yuqing / Huang, Jin / Lin, Min

    Journal of gastrointestinal surgery : official journal of the Society for Surgery of the Alimentary Tract

    2024  

    Abstract: Background: Endoscopic submucosal dissection (ESD) is widely used as a standard treatment regimen for early gastric cancers (EGCs). However, such an approach is time-consuming and has a high risk of perforation and bleeding in some corner-site lesions ... ...

    Abstract Background: Endoscopic submucosal dissection (ESD) is widely used as a standard treatment regimen for early gastric cancers (EGCs). However, such an approach is time-consuming and has a high risk of perforation and bleeding in some corner-site lesions because of the obscured view and difficulty in submucosal lifting. The newly developed pocket-creation method (PCM) provides a clearer view and better traction of the submucosal layer than conventional ESD (c-ESD). Nevertheless, no prospective randomized study has evaluated the efficacy of the PCM in EGCs and precancerous lesions.
    Methods: This was a prospective randomized controlled trial. Patients with superficial gastric neoplastic lesions≥20mm were randomly assigned to the PCM-ESD group or c-ESD group. The primary outcome was dissection speed.
    Results: There were 28 patients in the PCM-ESD group and 27 in the c-ESD group. The median dissection speed was significantly higher in the PCM-ESD group than in the c-ESD group (21.5 mm
    Conclusions: PCM-ESD was an effective and safe treatment for EGCs and precancerous lesions.
    Language English
    Publishing date 2024-04-16
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 2012365-6
    ISSN 1873-4626 ; 1934-3213 ; 1091-255X
    ISSN (online) 1873-4626 ; 1934-3213
    ISSN 1091-255X
    DOI 10.1016/j.gassur.2024.04.013
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    In stock of ZB MED Cologne/Königswinter

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    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
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  5. Article ; Online: Adaptive filtering and smoothing algorithm based on variable structure interactive multiple model.

    Hu, Kai-Yu / Wang, Jiaming / Cheng, Yuqing / Yang, Chunxia

    Scientific reports

    2023  Volume 13, Issue 1, Page(s) 12993

    Abstract: For maneuvering target tracking, a novel adaptive variable structure interactive multiple model filtering and smoothing (AVSIMMFS) algorithm is proposed in this paper. Firstly, an accurate model of the variable structure interactive multiple model ... ...

    Abstract For maneuvering target tracking, a novel adaptive variable structure interactive multiple model filtering and smoothing (AVSIMMFS) algorithm is proposed in this paper. Firstly, an accurate model of the variable structure interactive multiple model algorithm is established. Secondly, by constructing a new model subset based on the original model subsets, the matching accuracy between the model subset and the actual maneuvering mode of the target is improved. Then, the AVSIMMFS algorithm is obtained by smoothing the filtered data of the new model subset. Because of the combination of forward filtering and backward smoothing, the target tracking accuracy is further improved. Finally, in order to verify the effectiveness of the algorithm, the simulation is carried out on two cases. The simulation results show that the tracking performance of AVSIMMFS algorithm is better than other methods and has lower calculation cost.
    Language English
    Publishing date 2023-08-10
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-023-39075-9
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  6. Article ; Online: Impact of main residential locations on depressive symptoms among older adults in China: A Blinder-Oaxaca decomposition analysis.

    Cheng, Yuqing / Yu, Qiutong / Li, Wei / Zuo, Genyong

    Frontiers in public health

    2022  Volume 10, Page(s) 934940

    Abstract: Background: With the development of urbanization in China, the scale of internal migration and the number of immigrants among older adults are increasing. This requires paying attention to the living conditions and environment of immigrants. Many ... ...

    Abstract Background: With the development of urbanization in China, the scale of internal migration and the number of immigrants among older adults are increasing. This requires paying attention to the living conditions and environment of immigrants. Many studies note a gap in the prevalence of depressive symptoms among older adults living in different main residential locations. However, few studies have examined the extent to which main residential locations influence depressive symptoms among older adults. This study aims to quantify the effect of main residential locations on depressive symptoms.
    Methods: For this study, we used data from the 2018 Chinese Longitudinal Health and Longevity Survey and randomly selected 8,210 individuals aged 65 years and older were from the community to determine the effect of main residential locations on depressive symptoms among older adults. We further used the Blinder-Oaxaca decomposition method to quantify the explanatory factors of depressive symptom gaps among older adults and to estimate the relative effect of individual characteristics on depressive symptoms.
    Results: In this study, we noted significant differences in depressive symptoms among older adults in different main residential locations. Rural-urban migrants had higher depressive symptom scores (7.164). According to the Blinder-Oaxaca decomposition analysis, the high proportion of the depressive symptom gap can be explained by years of education, income, and exercise among different main residential locations groups. In addition, in the main parts of the explained differences, the proportions of the limitation of activities of daily living (2.28, 0.46, and -52.11%) showed opposite effects, while their share in different main residential locations groups varied widely.
    Conclusion: Urbanization has resulted in more rural people moving to urban areas in China; Rural-urban migrants have the highest prevalence of depressive symptoms, which needs attention. Thus, there is an urgent need to integrate the health insurance and pension policy for urban and rural residents. This study provides a basis for formulating health policies and promoting the mental health of older adults in China as well as in low- and middle-income countries.
    MeSH term(s) Humans ; Aged ; Depression/epidemiology ; Activities of Daily Living ; Surveys and Questionnaires ; Income ; China/epidemiology
    Language English
    Publishing date 2022-12-05
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2711781-9
    ISSN 2296-2565 ; 2296-2565
    ISSN (online) 2296-2565
    ISSN 2296-2565
    DOI 10.3389/fpubh.2022.934940
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  7. Article ; Online: Nonlinear plexcitons: excitons coupled with plasmons in two-photon absorption.

    Chen, Yichuan / Cheng, Yuqing / Sun, Mengtao

    Nanoscale

    2022  Volume 14, Issue 19, Page(s) 7269–7279

    Abstract: The nonlinear optical properties of a D-A (donor-acceptor) conjugated organic molecule with polythiophene (PT) as the donor and indene- ... ...

    Abstract The nonlinear optical properties of a D-A (donor-acceptor) conjugated organic molecule with polythiophene (PT) as the donor and indene-C
    Language English
    Publishing date 2022-05-19
    Publishing country England
    Document type Journal Article
    ZDB-ID 2515664-0
    ISSN 2040-3372 ; 2040-3364
    ISSN (online) 2040-3372
    ISSN 2040-3364
    DOI 10.1039/d1nr08163b
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Mediating Factors Explaining the Associations between Solid Fuel Use and Self-Rated Health among Chinese Adults 65 Years and Older: A Structural Equation Modeling Approach.

    Yu, Qiutong / Cheng, Yuqing / Li, Wei / Zuo, Genyong

    International journal of environmental research and public health

    2022  Volume 19, Issue 11

    Abstract: Exposure to indoor air pollution from cooking with solid fuel has been linked with the health of elderly people, although the pathway to their association is unclear. This study aimed to investigate the mediating effects between solid fuel use and self- ... ...

    Abstract Exposure to indoor air pollution from cooking with solid fuel has been linked with the health of elderly people, although the pathway to their association is unclear. This study aimed to investigate the mediating effects between solid fuel use and self-rated health by using structural equation modeling (SEM) with the baseline data from Chinese Longitudinal Healthy Longevity Survey (CLHLS). We conducted a cross-sectional survey among 7831 elderly people aged >65 years from the CLHLS. SEM was used to analyze the pathways underlying solid fuel use and self-rated health. We estimated indirect effects of sleep quality (β = −0.027, SE = 0.006), cognitive abilities (β = −0.006, SE = 0.002), depressive symptoms (β = −0.066, SE = 0.007), systolic blood pressure (β = 0.000, SE = 0.000), and BMI (β = −0.000, SE = 0.000) on the association between solid fuel and the self-rated health using path analysis. Depressive symptoms emerged as the strongest mediator in the relationship between solid fuel use and self-rated health in the elderly. Interventions targeting sleep quality, cognitive abilities, depressive symptoms, systolic blood pressure, and BMI could greatly reduce the negative effects of solid fuel use on the health of the elderly population.
    MeSH term(s) Adult ; Aged ; Air Pollution, Indoor/analysis ; China/epidemiology ; Cooking ; Cross-Sectional Studies ; Humans ; Latent Class Analysis ; Mediation Analysis
    Language English
    Publishing date 2022-06-05
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2175195-X
    ISSN 1660-4601 ; 1661-7827
    ISSN (online) 1660-4601
    ISSN 1661-7827
    DOI 10.3390/ijerph19116904
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  9. Article: Physical Mechanisms on Plasmon-Enhanced Organic Solar Cells

    Chen, Yichuan / Cheng, Yuqing / Sun, Mengtao

    Journal of physical chemistry. 2021 Sept. 15, v. 125, no. 38

    2021  

    Abstract: An organic solar cell is regarded as one of the emerging and potential alternatives for solar cells, due to its low cost and high photoelectric conversion efficiency. Here, using the plasmon-enhanced method, the electric field of the polythiophene/indene- ...

    Abstract An organic solar cell is regarded as one of the emerging and potential alternatives for solar cells, due to its low cost and high photoelectric conversion efficiency. Here, using the plasmon-enhanced method, the electric field of the polythiophene/indene-C₆₀ bisadduct (PT:IC₆₀BA) donor–acceptor system as the photoactive molecular layer is significantly enhanced up to the order of 10⁴ at around 475 nm. Besides, the surface plasmon thermal effect is calculated based on the coupling model of a nanoparticle dimer with a Ag film, where the molecular layer is in the nanocavity between the dimer and the film. The band gap and open-circuit voltage decrease with the increase of temperature. The electron–hole generation rate is enhanced up to 1.4 × 10³, and photocurrent can be enhanced around 230 times by surface plasmon resonance. Our results provide theoretical support for plasmon-enhanced organic solar cells.
    Keywords electric current ; electric field ; electric potential difference ; models ; physical chemistry ; solar cells ; surface plasmon resonance ; temperature
    Language English
    Dates of publication 2021-0915
    Size p. 21301-21309.
    Publishing place American Chemical Society
    Document type Article
    ISSN 1932-7455
    DOI 10.1021/acs.jpcc.1c07020
    Database NAL-Catalogue (AGRICOLA)

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  10. Article: Felodipine Determination by a CdTe Quantum Dot-Based Fluorescent Probe.

    Lv, Yuguang / Cheng, Yuqing / Lv, Kuilin / Zhang, Guoliang / Wu, Jiang

    Micromachines

    2022  Volume 13, Issue 5

    Abstract: In this work, a CdTe quantum dot-based fluorescent probe was synthesized to determine felodipine (FEL). The synthesis conditions, structure, and interaction conditions with FEL of CdTe quantum dots were analysed by fluorescence spectrophotometry, Fourier ...

    Abstract In this work, a CdTe quantum dot-based fluorescent probe was synthesized to determine felodipine (FEL). The synthesis conditions, structure, and interaction conditions with FEL of CdTe quantum dots were analysed by fluorescence spectrophotometry, Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), UV-visible spectroscopy, and TEM. The CdTe QD concentration was 2.0 × 10
    Language English
    Publishing date 2022-05-18
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2620864-7
    ISSN 2072-666X
    ISSN 2072-666X
    DOI 10.3390/mi13050788
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