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  1. Article ; Online: Roles of Oxygen-Containing Functional Groups in Carbon for Electrocatalytic Two-Electron Oxygen Reduction Reaction.

    Zhao, Guoqiang / Chen, Tianci / Tang, Aidong / Yang, Huaming

    Chemistry (Weinheim an der Bergstrasse, Germany)

    2024  , Page(s) e202304065

    Abstract: Recent years have witnessed great research interests in developing high-performance electrocatalysts for the two-electron ( ... ...

    Abstract Recent years have witnessed great research interests in developing high-performance electrocatalysts for the two-electron (2e
    Language English
    Publishing date 2024-03-15
    Publishing country Germany
    Document type Journal Article ; Review
    ZDB-ID 1478547-X
    ISSN 1521-3765 ; 0947-6539
    ISSN (online) 1521-3765
    ISSN 0947-6539
    DOI 10.1002/chem.202304065
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  2. Article: Measurement and Control System for Atomic Force Microscope Based on Quartz Tuning Fork Self-Induction Probe.

    Luo, Yongzhen / Ding, Xidong / Chen, Tianci / Su, Tao / Chen, Dihu

    Micromachines

    2023  Volume 14, Issue 1

    Abstract: In this paper, we introduce a low-cost, expansible, and compatible measurement and control system for atomic force microscopes (AFM) based on a quartz tuning fork (QTF) self-sensing probe and frequency modulation, which is mainly composed of an embedded ... ...

    Abstract In this paper, we introduce a low-cost, expansible, and compatible measurement and control system for atomic force microscopes (AFM) based on a quartz tuning fork (QTF) self-sensing probe and frequency modulation, which is mainly composed of an embedded control system and a probe system. The embedded control system is based on a dual-core OMAPL138 microprocessor (DSP + ARM) equipped with 16 channels of a 16-bit high-precision general analog-to-digital converter (ADC) and a 16-bit high-precision general digital-to-analog converter (DAC), six channels of an analog-to-digital converter with a second-order anti-aliasing filter, four channels of a direct digital frequency synthesizer (DDS), a digital input and output (DIO) interface, and other peripherals. The uniqueness of the system hardware lies in the design of a high-precision and low-noise digital-analog hybrid lock-in amplifier (LIA), which is used to detect and track the frequency and phase of the QTF probe response signal. In terms of the system software, a software difference frequency detection method based on a digital signal processor (DSP) is implemented to detect the frequency change caused by the force gradient between the tip and the sample, and the relative error of frequency measurement is less than 3%. For the probe system, a self-sensing probe controller, including an automatic gain control (AGC) self-excitation circuit, is designed for a homemade balanced QTF self-sensing probe with a high quality factor (Q value) in an atmospheric environment. We measured the quality factor (Q value) of the balanced QTF self-sensing probes with different lengths of tungsten tips and successfully realized AFM topography imaging with a tungsten-tip QTF probe 3 mm in length. The results show that the QTF-based self-sensing probe and the developed AFM measurement and control system can obtain high quality surface topography scanning images in an atmospheric environment.
    Language English
    Publishing date 2023-01-15
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2620864-7
    ISSN 2072-666X
    ISSN 2072-666X
    DOI 10.3390/mi14010227
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  3. Article ; Online: Geometrical optical analysis of a gradient refractive index microresonator.

    Chen, Tianci / Kang, Zhaofeng / Yang, Yu / Zhao, Shuai / Zhang, Jun / Zhang, Lei / Wang, Keyi

    Journal of the Optical Society of America. A, Optics, image science, and vision

    2023  Volume 40, Issue 6, Page(s) 1208–1214

    Abstract: Optical microresonators confine light to small volumes through resonant circulation. Herein, whispering gallery mode (WGM) microresonators have ... ...

    Abstract Optical microresonators confine light to small volumes through resonant circulation. Herein, whispering gallery mode (WGM) microresonators have high
    Language English
    Publishing date 2023-09-14
    Publishing country United States
    Document type Journal Article
    ZDB-ID 283633-6
    ISSN 1520-8532 ; 1084-7529 ; 0740-3232
    ISSN (online) 1520-8532
    ISSN 1084-7529 ; 0740-3232
    DOI 10.1364/JOSAA.484595
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  4. Article: Effects of copper pyrithione (CuPT) on apoptosis, ROS production, and gene expression in hemocytes of white shrimp Litopenaeus vannamei.

    Chen, Tianci / Li, Shuhong / Liang, Zhi / Li, Ling / Guo, Hui

    Comparative biochemistry and physiology. Toxicology & pharmacology : CBP

    2022  Volume 256, Page(s) 109323

    Abstract: Copper pyrithione (CuPT) is used globally to prevent biofouling. However, it poses certain risks to aquatic ecosystems. To understand the effects of CuPT on Litopenaeus vannamei after exposure to different concentrations of CuPT (0, 64, and 128 μg/L), ... ...

    Abstract Copper pyrithione (CuPT) is used globally to prevent biofouling. However, it poses certain risks to aquatic ecosystems. To understand the effects of CuPT on Litopenaeus vannamei after exposure to different concentrations of CuPT (0, 64, and 128 μg/L), the apoptotic cell ratio, production of reactive oxygen species (ROS), and gene expression in the hemocytes were studied at 0, 3, 12, 24, and 48 h. The results revealed that ROS production was induced significantly at 3-48 h only in the 128 μg/L groups. The apoptotic cell ratio was increased significantly at 12 and 24 h in the 64 μg/L groups, and at 3-48 h in the 128 μg/L groups. Meanwhile, CuPT exposure changed gene expression in hemocytes at different levels. In the 64 μg/L groups, the expression of Mn-superoxide dismutase (MnSOD) was induced at 12 h, glutathione peroxidase (GPx) was induced at 24 and 48 h, caspase-3 induced at 24 h, metallothionein (MT) and HSP70 were increased at 3 h. In the 128 μg/L groups, MnSOD was increased at 3 h and then decreased at 12-48 h, GPx was up-regulated at 3, 24 h and then decreased at 48 h, caspase-3 was increased at 24 h, MT was increased at 3-48 h, HSP60 and HSP70 were up-regulated at 3-12 h. These results indicated that CuPT induced ROS production and the expression of caspase-3 in hemocytes, then caused hemocyte apoptosis. Expression levels of MnSOD, GPx, MT, HSP60, and HSP70 were up-regulated to protect the hemocyte against CuPT stress.
    MeSH term(s) Animals ; Apoptosis/genetics ; Caspase 3/metabolism ; Ecosystem ; Gene Expression ; Glutathione Peroxidase/metabolism ; HSP70 Heat-Shock Proteins/metabolism ; Hemocytes ; Metallothionein/metabolism ; Organometallic Compounds ; Penaeidae ; Pyridines ; Reactive Oxygen Species/metabolism
    Chemical Substances HSP70 Heat-Shock Proteins ; Organometallic Compounds ; Pyridines ; Reactive Oxygen Species ; copper pyrithione ; Metallothionein (9038-94-2) ; Glutathione Peroxidase (EC 1.11.1.9) ; Caspase 3 (EC 3.4.22.-)
    Language English
    Publishing date 2022-03-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 189285-x
    ISSN 1532-0456 ; 0306-4492 ; 0742-8413
    ISSN 1532-0456 ; 0306-4492 ; 0742-8413
    DOI 10.1016/j.cbpc.2022.109323
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  5. Article: The action of Y-F co-doping in LiNi0.5Mn1.5O4 positive electrode materials

    Lin, Fangchang / Wu, Hongming / Chen, Tianci / Zhou, Dengfeng / Yan, Wei / Guo, Jianbing

    Powder technology. 2022 Sept., v. 409

    2022  

    Abstract: The addition of either yttrium or fluorine has been reported to enhance electrochemical properties of spinel layered cathode material. In this work, pristine and Y-F co-doped LiNi₀.₄₉Mn₁.₄₉Y₀.₀₂O₄₋ₓFₓ (x = 0.02, 0.04, 0.06) spinel powders were ... ...

    Abstract The addition of either yttrium or fluorine has been reported to enhance electrochemical properties of spinel layered cathode material. In this work, pristine and Y-F co-doped LiNi₀.₄₉Mn₁.₄₉Y₀.₀₂O₄₋ₓFₓ (x = 0.02, 0.04, 0.06) spinel powders were synthesized by a citric acid aided route. The correlation between structural, morphological and electrochemical properties of all four cathodic materials was systematically studied. Y³⁺ and F⁻ co-doping led to the morphological evolution of LiNi₀.₅Mn₁.₅O₄ material. The introduction of Y³⁺ and F⁻ ions decreased the content of Mn³⁺ ions and lattice volume, which can alleviate the Jahn-Teller distortion and maintain the stability of spinel structure. The predominantly disordered of Y-F co-doped samples exhibited better rate capability. Moreover, the formation of microcracks within Y-F co-doped sample can be suppressed during cycles by Y³⁺ and F⁻ co-doping, which can enhance the strength of crystal structure, resulting in better cyclic stability. The LiNi₀.₄₉Mn₁.₄₉Y₀.₀₂O₀.₃₄F₀.₀₆ LNMO sample exhibited optimal electrochemical properties, delivering a discharge capacity of 136.044 mAh g⁻¹ after 200 cycles at 1C with superior retention of 96.8%, and the specific capacity reaching 102.030 mAh g⁻¹ at 5C. The synergistic influence of crystalline structure and morphology on electrochemical properties shows that Y-F co-doping has a positive impact on rate capability and cycling stability of LNMO materials.
    Keywords cathodes ; citric acid ; crystal structure ; electrochemistry ; fluorine ; technology ; yttrium
    Language English
    Dates of publication 2022-09
    Publishing place Elsevier B.V.
    Document type Article
    ISSN 0032-5910
    DOI 10.1016/j.powtec.2022.117812
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  6. Article: Effects of copper pyrithione (CuPT) on apoptosis, ROS production, and gene expression in hemocytes of white shrimp Litopenaeus vannamei

    Chen, Tianci / Li, Shuhong / Liang, Zhi / Li, Ling / Guo, Hui

    Comparative biochemistry and physiology. 2022 June, v. 256

    2022  

    Abstract: Copper pyrithione (CuPT) is used globally to prevent biofouling. However, it poses certain risks to aquatic ecosystems. To understand the effects of CuPT on Litopenaeus vannamei after exposure to different concentrations of CuPT (0, 64, and 128 μg/L), ... ...

    Abstract Copper pyrithione (CuPT) is used globally to prevent biofouling. However, it poses certain risks to aquatic ecosystems. To understand the effects of CuPT on Litopenaeus vannamei after exposure to different concentrations of CuPT (0, 64, and 128 μg/L), the apoptotic cell ratio, production of reactive oxygen species (ROS), and gene expression in the hemocytes were studied at 0, 3, 12, 24, and 48 h. The results revealed that ROS production was induced significantly at 3–48 h only in the 128 μg/L groups. The apoptotic cell ratio was increased significantly at 12 and 24 h in the 64 μg/L groups, and at 3–48 h in the 128 μg/L groups. Meanwhile, CuPT exposure changed gene expression in hemocytes at different levels. In the 64 μg/L groups, the expression of Mn-superoxide dismutase (MnSOD) was induced at 12 h, glutathione peroxidase (GPx) was induced at 24 and 48 h, caspase-3 induced at 24 h, metallothionein (MT) and HSP70 were increased at 3 h. In the 128 μg/L groups, MnSOD was increased at 3 h and then decreased at 12–48 h, GPx was up-regulated at 3, 24 h and then decreased at 48 h, caspase-3 was increased at 24 h, MT was increased at 3–48 h, HSP60 and HSP70 were up-regulated at 3–12 h. These results indicated that CuPT induced ROS production and the expression of caspase-3 in hemocytes, then caused hemocyte apoptosis. Expression levels of MnSOD, GPx, MT, HSP60, and HSP70 were up-regulated to protect the hemocyte against CuPT stress.
    Keywords Litopenaeus vannamei ; apoptosis ; biofouling ; caspase-3 ; copper pyrithione ; gene expression ; glutathione peroxidase ; hemocytes ; metallothionein ; physiology ; reactive oxygen species ; shrimp ; superoxide dismutase
    Language English
    Dates of publication 2022-06
    Publishing place Elsevier Inc.
    Document type Article
    ZDB-ID 189285-x
    ISSN 0306-4492 ; 0742-8413 ; 1532-0456
    ISSN 0306-4492 ; 0742-8413 ; 1532-0456
    DOI 10.1016/j.cbpc.2022.109323
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  7. Article: Toxicity of chronic waterborne zinc exposure in the hepatopancreas of Litopenaeus vannamei

    Liang, Zhi / Chen, Tianci / Yang, Furong / Li, Shuhong / Zhang, Shuang / Guo, Hui

    Chemosphere. 2022 Sept. 17,

    2022  

    Abstract: Zinc (Zn) is necessary for the survival of aquatic organisms; nevertheless, the accumulation of Zn in excessive amounts may have toxic consequences. Few studies focusing on the biochemical, morphological, and transcriptional effects of aqueous Zn in ... ...

    Abstract Zinc (Zn) is necessary for the survival of aquatic organisms; nevertheless, the accumulation of Zn in excessive amounts may have toxic consequences. Few studies focusing on the biochemical, morphological, and transcriptional effects of aqueous Zn in Litopenaeus vannamei have been reported, and the underlying toxic mechanism remains largely unknown. The present study was performed to investigate the growth performance, morphological alterations, physiological changes, and transcriptional responses after Zn exposure at 0 (control), 0.01, 0.1, and 1 mg/L concentrations for 30 days in white shrimp L. vannamei hepatopancreas. The results found that survival rate (SR) and growth performance were significantly reduced in 1 mg/L Zn group. Significant structural damage and significant Zn accumulation in hepatopancreas were observed. The activities of trypsin and amylase (AMS), and the total antioxidant capacity (T-AOC) were attenuated, while the production of reactive oxygen species (ROS) and malondialdehyde (MDA) content were significantly increased after Zn exposure. Many differentially expressed genes (DEGs) were obtained after Zn exposure, and the majority of these DEGs were downregulated. Ten DEGs involved in oxidative stress, immunological response, apoptosis, and other processes were selected for qRT-PCR validation and the expression profiles of these DEGs kept well consistent with the transcriptome data, which confirmed the accuracy and reliability of the transcriptome results. Subsequently, we screened 12 genes to examine the changes of expression in different concentrations in more detail. All the results implying that Zn exposure caused severe histopathological changes and increased Zn accumulation in hepatopancreas, altered immune, antioxidant and detoxifying response by regulating the gene expressions of related genes, and eventually might trigger apoptosis. These findings provide valuable information and a new perspective on the molecular toxicity of crustaceans in response to environmental heavy metal exposure.
    Keywords Litopenaeus vannamei ; amylases ; antioxidant activity ; apoptosis ; gene expression regulation ; genes ; growth performance ; heavy metals ; hepatopancreas ; histopathology ; immune response ; malondialdehyde ; oxidative stress ; reactive oxygen species ; shrimp ; survival rate ; toxicity ; transcription (genetics) ; transcriptome ; trypsin ; zinc
    Language English
    Dates of publication 2022-0917
    Publishing place Elsevier Ltd
    Document type Article
    Note Pre-press version
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2022.136553
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  8. Article ; Online: Toxicity of chronic waterborne zinc exposure in the hepatopancreas of white shrimp Litopenaeus vannamei.

    Liang, Zhi / Chen, Tianci / Yang, Furong / Li, Shuhong / Zhang, Shuang / Guo, Hui

    Chemosphere

    2022  Volume 309, Issue Pt 1, Page(s) 136553

    Abstract: Zinc (Zn) is necessary for the survival of aquatic organisms; nevertheless, the accumulation of Zn in excessive amounts may have toxic consequences. Few studies focusing on the biochemical, morphological, and transcriptional effects of aqueous Zn in ... ...

    Abstract Zinc (Zn) is necessary for the survival of aquatic organisms; nevertheless, the accumulation of Zn in excessive amounts may have toxic consequences. Few studies focusing on the biochemical, morphological, and transcriptional effects of aqueous Zn in Litopenaeus vannamei have been reported, and the underlying toxic mechanism remains largely unknown. The present study was performed to investigate the growth performance, morphological alterations, physiological changes, and transcriptional responses after Zn exposure at 0 (control), 0.01, 0.1, and 1 mg/L concentrations for 30 days in white shrimp L. vannamei hepatopancreas. The results found that survival rate (SR) and growth performance were significantly reduced in 1 mg/L Zn group. Significant structural damage and significant Zn accumulation in hepatopancreas were observed. The activities of trypsin and amylase (AMS), and the total antioxidant capacity (T-AOC) were attenuated, while the production of reactive oxygen species (ROS) and malondialdehyde (MDA) content were significantly increased after Zn exposure. Many differentially expressed genes (DEGs) were obtained after Zn exposure, and the majority of these DEGs were downregulated. Ten DEGs involved in oxidative stress, immunological response, apoptosis, and other processes were selected for qRT-PCR validation and the expression profiles of these DEGs kept well consistent with the transcriptome data, which confirmed the accuracy and reliability of the transcriptome results. Subsequently, we screened 12 genes to examine the changes of expression in different concentrations in more detail. All the results implying that Zn exposure caused severe histopathological changes and increased Zn accumulation in hepatopancreas, altered immune, antioxidant and detoxifying response by regulating the gene expressions of related genes, and eventually might trigger apoptosis. These findings provide valuable information and a new perspective on the molecular toxicity of crustaceans in response to environmental heavy metal exposure.
    MeSH term(s) Animals ; Hepatopancreas/metabolism ; Zinc/metabolism ; Reactive Oxygen Species/metabolism ; Antioxidants/metabolism ; Trypsin/metabolism ; Reproducibility of Results ; Penaeidae/genetics ; Malondialdehyde/metabolism ; Amylases/metabolism
    Chemical Substances Zinc (J41CSQ7QDS) ; Reactive Oxygen Species ; Antioxidants ; Trypsin (EC 3.4.21.4) ; Malondialdehyde (4Y8F71G49Q) ; Amylases (EC 3.2.1.-)
    Language English
    Publishing date 2022-09-22
    Publishing country England
    Document type Journal Article
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2022.136553
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  9. Article ; Online: Hyperspectral full polarization imaging system based on spatial modulation.

    Zhang, Lei / Yang, Yu / Zhao, Shuai / Chen, Tianci / Yu, Kaiyang / Wang, Keyi / Xie, Chengfeng / Wang, Mengyu / Cai, Bolin

    Applied optics

    2023  Volume 62, Issue 5, Page(s) 1428–1435

    Abstract: The hyperspectral full polarization imaging system (HFPIS) based on spatial modulation and liquid crystal tunable filter (LCTF) can modulate the polarization information of the target into the interferogram by means of interference imaging. It has the ... ...

    Abstract The hyperspectral full polarization imaging system (HFPIS) based on spatial modulation and liquid crystal tunable filter (LCTF) can modulate the polarization information of the target into the interferogram by means of interference imaging. It has the advantage of rapid imaging of the hyperspectral full polarization information from the target, and has good real time imaging and practicality. Through the spectroscopic imaging mode of a Savart prism, the corresponding interference optical path and imaging system are designed, including a beam expander, spatial modulator, LCTF, focusing system, and imaging sensor. This system can extract the different information from the target and demodulate it so as to obtain the hyperspectral polarization image. The experiment shows that the HFPIS can reveal the texture, contour, and other details of the target in the fog, and has obvious advantages over the traditional intensity imaging methods.
    Language English
    Publishing date 2023-02-13
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4522
    ISSN (online) 1539-4522
    DOI 10.1364/AO.478331
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  10. Article: NADPH oxidase involved in immune response via regulating the expression of antioxidant genes in Litopenaeus vannamei

    Liang, Zhi / Liang, Jinrong / Li, Ling / Chen, Tianci / Guo, Hui

    Aquaculture reports. 2021 Nov., v. 21

    2021  

    Abstract: Free radicals such as reactive oxygen species (ROS) play a significant role in the innate immune system. Nicotinamide adenine dinucleotide phosphate (NADPH) oxidases (Noxes) are found to be involved in ROS production and played crucial roles in host ... ...

    Abstract Free radicals such as reactive oxygen species (ROS) play a significant role in the innate immune system. Nicotinamide adenine dinucleotide phosphate (NADPH) oxidases (Noxes) are found to be involved in ROS production and played crucial roles in host biological processes of humans, insects, and plants. However, there are relatively few studies on the function of Noxes in crustaceans. In this study, the full-length cDNA of Nox was cloned from Litopenaeus vannamei by rapid amplification of cDNA ends (RACE) to obtain a 3790 base pairs (bp) cDNA sequence. LvNox cDNA comprised a 5’-untranslated region (UTR) of 454 bp, a 3’-UTR of 333 bp, and a putative open reading frame (ORF) of 3006 bp. Structural analysis showed that LvNox had a transmembrane helical segment (THS) at positions 233-255, a flavin adenine dinucleotide (FAD) binding domain (at positions 447-579), and a nicotinamide adenine dinucleotide (NAD) binding domain (at positions 815-990). Tissue distribution analysis revealed that LvNox mRNA was expressed in heart, intestine, muscle, gill, hepatopancreas, stomach, epidermis, hemocyte, and eyestalk. High expression levels of LvNox were observed in epidermis, hemocyte and eyestalk. The expression levels of LvNox were significantly induced after Vibrio alginolyticus injection for 6, 12, 24 and 48 h, and after Cu exposure for 24 and 48 h. Furthermore, the RNA interference of LvNox significantly reduced the production of ROS and the expression levels of copper/zinc superoxide dismutase (Cu-Zn SOD), catalase (CAT) and nitric oxide synthase (NOS). These results indicated that LvNox could be induced by V. alginolyticus infection and Cu exposure, which might be involved in immune response of shrimp via regulating the expression of antioxidant genes. These findings provide a solid foundation for further study of the function of Noxes in crustaceans.
    Keywords Litopenaeus vannamei ; NAD (coenzyme) ; NAD(P)H oxidase (H2O2-forming) ; NADP (coenzyme) ; RNA interference ; Vibrio alginolyticus ; aquaculture ; catalase ; copper ; flavin-adenine dinucleotide ; heart ; hemocytes ; hepatopancreas ; immune response ; innate immunity ; intestines ; muscles ; nitric oxide synthase ; reactive oxygen species ; shrimp ; stomach ; superoxide dismutase ; tissue distribution ; zinc
    Language English
    Dates of publication 2021-11
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 2835391-2
    ISSN 2352-5134
    ISSN 2352-5134
    DOI 10.1016/j.aqrep.2021.100810
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