JOURNAL OF APPLIED ENTOMOLOGY
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2023
·Vol. 147
·期 10
·924-930
·
IF 1.9
Jia Zhou,Li-Lin Chen,Yu-Tong Zhu,Evan Siemann,Nian-Feng Wan
Sunflowers ( Helianthus annuus ) are potential trap crops to attract the yellow peach moth ( Conogethes punctiferalis ) in orchards but the volatile compounds released from sunflowers and their effects on C. punctiferalis behaviour are not clear. Here we used solid phase micro-extraction to collect volatiles released from flower disks of sunflowers, identified them by gas chromatography–mass spectrometry, and examined the attractiveness of some of the compounds to mated female adult C. punctiferalis moths in Y-tube olfactometer choice tests. We detected nine volatile compounds (α-Pinene, β-Phellandrene, Camphene, β-Pinene, 3-Carene, D-Limonene, Eucalyptol, γ-Terpinen, and Valencene) with consistently large peak areas for α-Pinene and β-Phellandrene. Among tested volatiles, both α-Pinene and β-Phellandrene were attractive to C. punctiferalis in olfactometer tests but this was only significant for higher concentrations of β-Phellandrene. This suggests that β-Phellandrene may promote C. punctiferalis oviposition on sunflower disks. This study provides insights into volatile chemical mediated responses of insect herbivores to trap crops.
研究领域:
昆虫学
·
植物化学
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Matter
·
2023
·
IF 18.9
Luping Wang,Datao Tu,Chenliang Li,Siyuan Han,Fei Wen,Shiqi Yu,Xiaodong Yi,Zhi Xie,Xueyuan Chen
Persistent luminescence (PersL) and photostimulated luminescence (PSL) materials exhibit fascinating optical properties originating from energy harvesting and controllable release. However, it remains challenging to obtain multicolor PersL and PSL simultaneously. Herein, we develop lanthanide (Ln 3+ )-doped Cs 2 NaGdF 6 phosphors with shallow and deep defects, achieving both multicolor PersL and PSL through engineering trap distribution. Benefiting from manipulating fluorine vacancy and energy-level locations of Ln 3+ in Cs 2 NaGdF 6 phosphors by introducing different Ln 3+ dopants, the depth and density of electron and hole traps can be tuned, resulting in PersL of more than one week with emissions from 311 to 1,536 nm and multicolor PSL with high recyclability. Both thermoluminescence analysis and theoretical calculations reveal the mechanism of trap distribution regulation in Cs 2 NaGdF 6 phosphors via Ln 3+ doping. These findings provide fundamental insights into exploring multicolor PersL and PSL materials, thereby opening up new opportunities for versatile applications.
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ANALYTICAL CHEMISTRY
·
2013
·
IF 5.695
Liang Wang,Fuxing Xu,Chuan-Fan Ding
A digital ion trap (DIT) and rectilinear ion trap (RIT) have been proven to be very useful technology in the past years. In this work, the digital ion trap technology was combined with the ceramic-based rectilinear ion trap (cRIT) system. The rectangular waveform was used for ion trapping. A dipolar excitation waveform which was formed by dividing down the trapping rectangular waveform was used for the ion ejection. We found that the high efficient collision-induced dissociation (CID) procedure could be obtained by simply manipulating the duty cycle of the dipole excitation waveform, and it could significantly simplify the tandem mass spectrometry analysis method and procedure with an ion trap, since the dipolar direct current (dc) voltage could be easily produced and applied to one of the pair of electrodes, which was fully controlled by the computer software and does not need any hardware modification.
研究领域:
质谱分析
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分析化学
·
仪器与探测器开发
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Materials Research Express
·
2017
·Vol. 4
·期 8
·085028
·
IF 1.068
Guangguang Huang,Chunlei Wang,Shuhong Xu,Yiping Cui
For ultrasmall Mn-doped quantum dots (QDs), the energy transfer of the exciton to the Mn is the key factor for Mn emission. Herein, the Ag-induced electron trap state energy level, which is an intermediate energy level between the conduction band (CB) and 4T1 of Mn, is proposed for improving the energy transfer. After doping the Ag and forming Ag&Mn:ZnInS QDs, most excitons will first be captured by the intermediate energy level and then be transferred to Mn d-states, leading to enhanced photoluminescence (PL) quantum yields (QY) of the QDs from the original 17% (Mn:ZnInS QDs) to 30% (Ag&Mn:ZnInS QDs).
研究领域:
材料科学
·
光学
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Antioxidants
·
2026
·Vol. 15
·期 5
·625
·
IF 8.2
Dongkun Zhao,Xin Wang,Lijuan Wang,Qing Ma,Jingwen Li,Baocheng Xu,Xinjing Dou,Lili Liu
Furfuryl alcohol (FFA), a methanol-soluble and highly specific compound for singlet oxygen (1O2), was used as a1O2trapping agent to reevaluate physical and chemical1O2quenching efficiency of five antioxidants, namely α-tocopherol, butylated hydroxyanisole (BHA), tert-butylhydroquinone (TBHQ), epigallocatechin gallate (EGCG), and quercetin. The total1O2quenching rate constants of α-tocopherol, BHA, TBHQ, EGCG, and quercetin were 2.0 (±0.1) × 109, 1.1 (±0.1) × 108, 5.6 (±0.3) × 108, 4.1 (±0.1) × 108, and 2.2 (±0.1) × 108M−1s−1, respectively. The chemical quenching rate constants of α-tocopherol, BHA, TBHQ, EGCG, and quercetin were 1.4 × 107, 2.0 × 106, 7.7 × 106, 2.0 × 107, and 7.9 × 106M−1s−1, respectively. The percentages of chemical quenching in total1O2quenching were 0.7%, 1.8%, 1.4%, 4.8%, and 3.6% for α-tocopherol, BHA, TBHQ, EGCG, and quercetin, respectively, indicating that the five antioxidants quenched1O2almost exclusively by a physical quenching mechanism. This is the first report on the1O2quenching mechanism of quercetin in methanol solvent. The results of this study will provide theoretical guidance for the application of antioxidants to inhibit edible oil or fat-containing food from photooxidation.
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PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Jun Zhan,La Chen,Gangqiang Li,Luhong Wen
Direct ionization ion trap mass spectrometry (ITMS) consistently faces challenges from matrix interference, necessitating highly specific analytical strategies to ensure reliable compound identification. However, the performance of tandem mass spectrometry (MS/MS) in conventional ITMS systems, which primarily rely on collision-induced dissociation (CID) for ion activation—is often constrained by the low-mass cutoff (LMCO) effect and suboptimal fragmentation efficiency. To address these limitations, we developed a portable ITMS platform that integrates both beam-type collision-induced dissociation (bCID) and CID technologies. In this platform, a flared ion guide serves dual roles as an ion transfer device and a collision cell for bCID. Compared with a parallel square-rod ion guide, the flared design-without compromising instrument portability shortens the dissociation time from 40 to 20 ms and increases the total dissociation efficiency by approximately 10%. Experimental results demonstrated that the bCID activation method effectively alleviates the LMCO restriction, while simultaneously improving fragmentation efficiency and analytical throughput, particularly for low-mass fragments. Furthermore, bCID provides greater flexibility in modulating fragment ion abundance through dissociation voltage adjustment and exhibits a distinct advantage in dissociating molecules containing strong chemical bonds. In the analysis of complex matrices such as hair and serum, bCID enhanced the signal-to-noise (S/N) ratios for compounds including tramadol, metonitazene and brodifacoum compared to CID. This enhancement was achieved by strengthening low-mass fragment ion intensities while reducing background noise through the breakdown of matrix-derived interference ions into non-specific fragments. Additionally, the complementary use of CID and bCID offered superior specificity for detecting designer drugs (e.g., etomidate and propoxate) in urine and food additives (e.g., saccharin sodium and benzoic acid) in ham, by generating a sufficient set of diagnostic ions with high abundance and S/N ratios. These findings underscore the importance of incorporating the hybrid dissociation modes into portable ITMS systems for on-site analysis of complex samples.
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JOURNAL OF RARE EARTHS
·
2026
·
IF 9.6
Junwei Zhang,Hui Lin,Yang Tang,Ruijin Hong,Zhaoxia Han,Changyu Lu,Dawei Zhang,Jianren Xu
Inorganic luminescent materials play a critical role in the fields of multimodal anti-counterfeiting. Although integrating multiple luminescence modes into a single matrix is considered a feasible strategy, it still faces significant challenges such as the regulation and identification of trap levels. Herein, Ba 0.75 Al 11 O 17.25 :Eu 2+ ,Yb 3+ ,Er 3+ phosphors integrating multiple luminescence modes, including afterglow, up-conversion luminescence (UCL), photo-stimulated luminescence (PSL), and thermoluminescence (TL) were developed. Importantly, the introduction of the Yb 3+ /Er 3+ ion pair not only suppresses the concentration of shallow traps but also induces the formation of numerous deep traps (1.62 eV), which are essential for multimodal luminescence and enhance the thermal stability of the luminescence. Furthermore, through comprehensive analysis of density functional theory (DFT) calculation, TL curves, electron paramagnetic resonance (EPR) and X-ray photoelectron spectroscopy (XPS), it is confirmed that the trap levels primarily originate from oxygen vacancies and interstitial aluminum. Finally, a highly stable flexible film was fabricated, whose emission intensity and color can be controlled by external light/thermal stimuli, and its applications in anti-counterfeiting and information encryption are demonstrated. This work facilitates the research on advanced luminescent materials and traps regulation mechanisms.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Cong He,Bing Li,Chunwen Ye,Meng Wu,Yanjie Zhang
Multi-modal strategies for optical information storage have received a lot of attention to meet the increasing security requirements. In this case, long persistent luminescence (LPL) phosphors with different dopant ions were obtained by introducing Dy 3+ and Ho 3+ ions into the BaSi 2 O 5 :Eu 2+ phosphor to adjust the distribution and depth of the trap centers. The generation of the pure phase BaSi 2 O 5 was confirmed by X-ray diffraction (XRD) and XRD Rietveld refinement . The peak emission of BaSi 2 O 5 : Eu 2+ phosphor is about 500 nm with 313 nm excitation. Both BaSi 2 O 5 : Eu 2+ , Dy 3+ , and BaSi 2 O 5 : Eu 2+ , Ho 3+ phosphors exhibit emission characteristics of Eu 2+ ions. The trap depths of the three phosphors are different by Gaussian fitting of thermoluminescence (TL) curves, and the depth of BaSi 2 O 5 : Eu 2+ , Dy 3+ phosphor can reach 1.070 eV. Typically, the flexible luminescent film based on BaSi 2 O 5 : Eu 2+ phosphor can be written optical pattern using 365 nm ultraviolet (UV) light, such as "DL" and "fireworks" patterns, and subsequently read out by thermal or infrared light stimulus. Further, a strategy for encryption and decryption of dynamic optical information in Morse code has been developed using BaSi 2 O 5 : Eu 2+ , BaSi 2 O 5 : Eu 2+ , Dy 3+ , and BaSi 2 O 5 : Eu 2+ , Ho 3+ phosphors, indicating the prospective use in optical information security.
研究领域:
材料科学
·
光学工程
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高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Changchun Qi,Xiong Yang,Jiufeng Dong,Guangyu Sun,Wenrui Li,Fangzheng Zou,Ruitong Zhou,Xiaogang Qin,Baipeng Song,Guanjun Zhang
Polyimide (PI), a high-performance polymer widely employed in aerospace applications due to its superior electrical insulation, processability, and long-term stability, faces operational challenges at vacuum-solid interfaces. Under extreme space conditions, vacuum flashover phenomena frequently occur at PI interfaces during spacecraft operation, critically jeopardizing the reliability of the onboard electronic components. This study demonstrates a molecular engineering strategy to suppress secondary electron emission and improve surface insulation by modulating trap states through strong electron-withdrawing groups. Two all-organic specialty PI films were systematically developed via a strategic molecular structure design and subsequently fabricated. These films incorporate strong electron-withdrawing groups (e.g., −SO2– and −CF3), which effectively enhance trap densities and deepen trap levels, thereby suppressing the secondary electron multiplication process. Both specialty PI films demonstrated significantly enhanced vacuum surface flashover thresholds, with their vacuum flashover voltages Uho increased by 12.65 and 17.08% compared to pristine PI, respectively. The proposed molecular design paradigm provides a fundamental advancement in dielectric materials engineering, addressing the critical need for high-voltage tolerant insulation systems in next-generation spacecraft requiring elevated operational power and extended mission durations.
研究领域:
材料科学
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电气工程
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高分子科学
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航空航天工程
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固体物理学
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CLINICAL AND EXPERIMENTAL IMMUNOLOGY
·
2025
·
IF 3.8
Su Qiyan,Feng Yingyue,Guo Jin,Cui Xi,Zhu Jiarui,Yang Jumei,Zhang Sigong
BackgroundIdiopathic inflammatory myopathy (IIM) is a progressive autoimmune disease characterized by interstitial lung disease (ILD) with limited therapeutics available. Pirfenidone (PFD), a medication utilized for the treatment of idiopathic pulmonary fibrosis, exhibits notable antioxidant, anti-inflammatory and inhibition of collagen synthesis. This study aims to clarify its efficacy and mechanism in treating IIM-ILD.MethodsA murine myositis-associated interstitial lung disease (MAILD) model was used to assess the therapeutic effect of PFD. The serum levels of IL-1β, IL-6 and TNF-α were detected by ELISA. PFD was utilized to disrupt neutrophil extracellular traps (NETs) formation in vitro, and its inhibitory effect on NETs was assessed through immunohistochemistry of CitH3 and MPO in the lung tissue and the serum cfDNA level in mice. Immunohistochemical and western blot was utilized to examine alterations in epithelial-mesenchymal transition (EMT) and NLRP3 inflammasome markers.ResultsPFD treatment inhibited pulmonary inflammation and fibrosis in the MAILD model. PFD intervention reduced NETs formation in vitro. PFD treatment significantly reduce NETs infiltration in the lung tissue and the level of cfDNA in the serum of mice. Additionally, PFD down-regulated EMT and NLRP3-related proteins in vivo. PFD treatment also notably reduced serum levels of IL-1β, IL-6 and TNF-α. After NETs stimulation, A549 cells exhibited EMT and activation of NLRP3 inflammasome. PFD attenuated EMT in A549 cells and suppressed the activation of NLRP3 inflammasome.ConclusionPFD alleviates ILD in a murine MAILD model by inhibiting NETs formation and NLRP3 inflammasome activation, suggesting that PFD might be a potential therapeutic agent for IIM-ILD.
研究领域:
免疫学
·
呼吸病学
·
药理学
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高影响因子
Advanced Science
·
2019
·Vol. 6
·期 20
·1901410
·
IF 15.804
Zequn Yang,Hailong Li,Junwei Yang,Qin Yang,Jiexia Zhao,Jianping Yang,Wenqi Qu,Yong Feng,Kaimin Shih
The key challenge of vapor-phase elemental mercury (Hg 0 ) sequestration is the rational design of a sorbent with abundantly available ligands that exhibit excellent affinity toward Hg 0 to simultaneously achieve a high uptake capacity and rapid capture rate. In this work, it is demonstrated how the correct combination of functional ligands and structural properties can form an ideal remediator for permanent Hg 0 immobilization. The adsorption capacity of an amorphous molybdenum triselenide (MoSe 3 ) nanosheet greater than 1000 mg g −1 is the highest recorded value compared to previously reported sorbents tested in a fixed-bed reactor. Meanwhile, the uptake rate of 240 µg g −1 min −1 is also the highest recorded rate value. Mercury selenide as formed exhibits extremely low leachability when environmentally exposed. This impressive performance is primarily attributed to the appropriate layer space between the nanosheets that permeated Hg 0 and the existence of diselenide (Se 2 2− ) ligands that exhibit excellent affinity toward Hg 0 . Thus, this work not only provides a promising trap for permanent Hg 0 sequestration from industrial and domestic sources with minimum hazard but also provides a detailed illustration of using structural advantages to obtain an ideal sorbent as well as guidance for the further development of Hg 0 decontamination techniques.
研究领域:
环境科学
·
材料科学
·
化学工程
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高影响因子
POLYMER DEGRADATION AND STABILITY
·
2026
·
IF 8.1
Duo Ji,Chunyang Li,Zhen Li,Xu Yang,Xiansheng Chen,Hong Zhao
The swelling of rubber caused by silicone grease significantly accelerates the deterioration of the electrical properties of cable accessories, particularly at the surface and interface regions. This study investigates the impact of swelling aging on the insulation performance and trap characteristics of ethylene propylene diene monomer (EPDM) modified by the voltage stabilizer 4-allyloxy-2-hydroxybenzophenone (AOHBP). Physicochemical characterization, electrical measurements, and molecular dynamics simulations were employed to analyze the evolution of EPDM insulation performance under silicone grease swelling. Results indicate that the swelling process alters the trap distribution and reduces the density of deep traps, thereby weakening the material's insulation performance. However, compared to unmodified samples, the grafted EPDM exhibits a higher EPDM/XLPE interfacial breakdown strength and improved anti-swelling capability. Mechanism analysis reveals that the grafted AOHBP introduces steric hindrance, which inhibits the diffusion of silicone grease molecules into the EPDM matrix, effectively alleviating the degradation of surface and interface insulation performance induced by swelling.
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高影响因子
危险品化学品经营许可证（带存储）