Skip to main content

11 Result(s)

within Chuanxia Chen Remove this filter English Remove this filter

and

  1. No Access

    Article

    Fluorometric determination of sulfide ions via its inhibitory effect on the oxidation of thiamine by Cu(II) ions

    A fluorometric assay is described for sulfide ions determination. It is based on the finding that the oxidation of the non-fluorescent substrate thiamine (TH) by Cu(II) in basic solution to form fluorescent th...

    Pengjuan Ni, Chuanxia Chen, Yuanyuan Jiang, Zhenlu Zhao, Yizhong Lu in Microchimica Acta (2018)

  2. No Access

    Article

    Fluorometric determination of the activity of alkaline phosphatase and its inhibitors based on ascorbic acid-induced aggregation of carbon dots

    The authors describe a fluorometric method for determination of the activity of alkaline phosphatase (ALP) and its inhibitors. Nitrogen and boron co-doped carbon dots (C-dots) with excitation/emission peaks at...

    Pengjuan Ni, Junfeng **e, Chuanxia Chen, Yuanyuan Jiang, Yizhong Lu… in Microchimica Acta (2019)

  3. No Access

    Article

    Spectrophotometric determination of the activity of alkaline phosphatase and detection of its inhibitors by exploiting the pyrophosphate-accelerated oxidase-like activity of nanoceria

    The oxidase-like activity of nanoceria is low. This limits its practical applications. It is demonstrated here that pyrophosphate ion (PPi) can improve the oxidase-like activity of nanoceria. Specifically, nan...

    Pengjuan Ni, Junfeng **e, Chuanxia Chen, Yuanyuan Jiang, Zhenlu Zhao… in Microchimica Acta (2019)

  4. No Access

    Article

    Fluorometric and colorimetric dual-readout alkaline phosphatase activity assay based on enzymatically induced formation of colored Au@Ag nanoparticles and an inner filter effect

    An ultrasensitive fluorometric and colorimetric dual-mode assay is described for the determination of the activity of alkaline phosphatase (ALP). ALP catalyzes the decomposition of 2-phospho-L-ascorbic acid, a...

    Chuanxia Chen, Guanglu Zhang, Pengjuan Ni, Yuanyuan Jiang, Yizhong Lu… in Microchimica Acta (2019)

  5. No Access

    Article

    Colorimetric determination of the activity of alkaline phosphatase by exploiting the oxidase-like activity of palladium cube@CeO2 core-shell nanoparticles

    Core-shell palladium cube@CeO2 (Pd cube@CeO2) nanoparticles are shown to display oxidase-like activity. This is exploited in a method for determination of the activity of alkaline phosphatase (ALP). The Pd cube@C...

    Jiawei Wang, Pengjuan Ni, Chuanxia Chen, Yuanyuan Jiang… in Microchimica Acta (2020)

  6. No Access

    Article

    Ultrathin PdCu alloy nanosheet–assembled 3D nanoflowers with high peroxidase-like activity toward colorimetric glucose detection

    Enzyme-mimetic properties of nanomaterials can be efficiently tuned by controlling their size, composition, and structure. Here, ultrathin PdCu alloy nanosheet–assembled three-dimensional (3D) nanoflowers (Pd1Cux

    Wendong Liu, Junnan Guo, Chuanxia Chen, Pengjuan Ni, Yuanyuan Jiang… in Microchimica Acta (2021)

  7. No Access

    Article

    Colorimetric detection of acetylcholinesterase and its inhibitor based on thiol-regulated oxidase-like activity of 2D palladium square nanoplates on reduced graphene oxide

    A convenient and sensitive colorimetric assay for acetylcholinesterase (AChE) and its inhibitor has been designed based on the oxidase-like activity of {100}-faceted Pd square nanoplates which are grown in sit...

    Bingsong Yan, Wendong Liu, Guangbin Duan, Pengjuan Ni, Yuanyuan Jiang… in Microchimica Acta (2021)

  8. No Access

    Article

    Single-atom Pd catalysts as oxidase mimics with maximum atom utilization for colorimetric analysis

    Pd-based nanomaterials have shown great promise as potential mimic enzymes, but conventional catalysts use only a small fraction of the Pd content that located on the catalyst’s surface. Herein, we demonstrate...

    Zhe Li, Fangning Liu, Yuanyuan Jiang, Pengjuan Ni, Chenghui Zhang, Bo Wang… in Nano Research (2022)

  9. No Access

    Article

    Platinum nanoparticles confined in metal–organic frameworks as excellent peroxidase-like nanozymes for detection of uric acid

    High levels of uric acid (UA) in humans can cause a range of diseases, and traditional assays that rely on uric acid enzymes to break down uric acid are limited by the inherent deficiencies of natural enzymes....

    Mingyuan **a, Shushu Chu, Shuna Wang, Xuyang Dong… in Analytical and Bioanalytical Chemistry (2023)

  10. No Access

    Article

    Atomically-precise Au24Ag1 Clusterzymes with Enhanced Peroxidase-like Activity for Bioanalysis

    Atomically-precise clusterzymes have been widely studied for their special physicochemical properties, but it is still a challenge to enhance their peroxidase-like activity. Herein, we demonstrated that by subs.....

    Shuna Wang, Zhe Li, Mingyuan **a, **aoxue Zhao… in Chemical Research in Chinese Universities (2023)

  11. No Access

    Article

    Coordinatively unsaturated cobalt single-atom nanozymes for visual pesticides detection by smartphone-based platform

    By adjusting the coordination environment of single-atom catalysts, the enzyme-like activity can be finely tuned for highly sensitive biosensing. Herein, we demonstrated that coordinatively unsaturated cobalt-...

    Fangning Liu, Zhe Li, Hengya Wei, Peng Xu, Ge Kang, Shicheng Zhu… in Nano Research (2024)