JOURNAL OF PLANT BIOLOGY
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2024
·
IF 2.2
Zhan Niheng,Zhao Ziyi,Ren Lingyan,Yang Fuxin,Zhang Chuhan,Qin Lijun,Gong Xian
NAC (NAM/ATAF1,2/CUC2) is one of the most important plant-specific transcription factors, playing a significant role in plant growth, morphogenesis, and stress resilience. In this investigation, 77 members of the NAC gene family were identified from the Eucommia ulmoides database, and these E. ulmoides NAC families were classified into 18 subfamilies based on their protein sequences. Currently, the architectural design, conserved domains, and cis -acting elements of EuNAC genes, as well as physicochemical properties of EuNAC proteins, have also been analyzed. In addition, the expression patterns of selected EuNAC genes under five heavy metal (Cu 2+ , Cd 2+ , Pb 2+ , Mn 2+ , and As 5+ ) imposed stresses were investigated. The results showed that the expression of EuNAC9 experienced a significant induction to upregulate under these five heavy metal stresses, suggesting that EuNAC9 may mediate the response to these five heavy metal stresses. In addition, the function of EuNAC9 was investigated in both transgenic yeasts and tobaccos. The transgenic yeasts exhibited enhanced resistance to Mn 2+ stress by increasing the expression of ScSMF1 and ScSOD2 , whereas the transgenic tobacco grew better under Mn 2+ stress and showed intense antioxidant enzyme activity to alleviate the accumulation of H 2 O 2 and O 2 − . Moreover, subcellular localization indicated EuNAC9 was a nuclear localization protein, and the transcriptional activity domain of EuNAC9 resided at the C-terminal. This study will provide a theoretical framework for analyzing the molecular regulatory mechanisms of plant responses to heavy metals mediated by EuNAC9 genes and elucidating the biological roles of E. ulmoides NACs in responding to heavy metal stress.
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CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Tallat Munir,Jiawei Zhou,Ming Liu,Shiyang Bai,Jihong Sun
A highly effective synthetic clinoptilolite (SCP) was developed and assessed for its potential in the simultaneous removal of Cd 2+ , Ni 2+ , Mn 2+ , Sr 2+ , and Fe 3+ from an aqueous solution. The present work explored the influences of SCP dosage, initial metal ion concentrations, temperature, contact time, and pH value on the adsorption performances of these metal ions. The results revealed exceptionally high adsorption capacities, reaching 2000, 1720, 1875, 1510, and 22 mg/g for Ni 2+ , Fe 3+ , Cd 2+ , Mn 2+ , and Sr 2+ , respectively. The specific surface area of SCP increased from 31.4 to 44.7 m 2 /g after five cycles. The adsorption mechanism and structure assessment were elucidated by XRD patterns and SEM images, showing that the Fe 3+ adsorption conformed to the Langmuir isotherm, while that of Mn 2+ , Cd 2+ , Sr 2+ , and Ni 2+ followed the Freundlich isotherm model with the adsorption kinetics best described by the pseudo-2nd-order kinetic model. Thermodynamic parameters showed endothermic behavior for Cd 2+ , Ni 2+ , Mn 2+ , and Sr 2+ , exothermic for Fe 3+ , and spontaneity for all metals except Sr 2+ . SCP retained over 90 % of its adsorption capacity after five regeneration cycles, maintaining structural integrity under thermal, acidic, and recycling conditions. These findings highlight SCP’s robust characteristics, reusability, and potential for sustainable heavy metal removal from wastewater.
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MOLECULAR PHARMACEUTICS
·
2024
·
IF 4.5
Hong-Ying Xia,Ying Zhao,Ruo-Yin Meng,Ai-Zheng Chen,Shi-Bin Wang,Ranjith Kumar Kankala
Despite the advancements in cancer therapy, delivering active pharmaceutical ingredients (APIs) using nanoparticles remains challenging due to the failed conveyance of the required drug payload, poor targeting ability, and poor biodistribution, hampering their clinical translation. Recently, the appropriate design of materials with intrinsic therapeutic functionalities has garnered enormous interest in the development of various intelligent therapeutic nanoplatforms. In this study, we demonstrate the fabrication of transition metal (molybdenum, Mo)-doped manganese dioxide (MnO2) nanoarchitectures, exhibiting diagnostic (magnetic resonance imaging, MRI) and therapeutic (chemodynamic therapy, CDT) functionalities. The facile hydrothermal approach-assisted Mo-doped MnO2 flower-like nanostructures offered tailorable morphologies in altered dimensions, precise therapeutic effects, exceptional biocompatibility, and biodegradability in the tumor microenvironment. The resultant defects due to doped Mo species exhibited peroxidase and oxidase activities, improving glutathione (GSH) oxidation. The two sets of variable valence metal ion pairs (Mn2+/Mn4+ and Mo5+/Mo6+) and their interplay could substantially improve the Fenton-like reaction and generate toxic hydroxyl radicals (•OH), thus achieving CDT-assisted antitumor effects. As inherent T1-MRI agents, these MnO2 nanoparticles displayed excellent MRI efficacy in vitro. Together, we believe that these conformational Mo-doped MnO2 nanoarchitectures with two pairs of variable valence states could potentiate drugless therapy in pharmaceutics.
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JOURNAL OF MATERIALS RESEARCH
·
2024
·Vol. 39
·期 14
·1989-1998
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IF 2.7
Li Xin,He Yu,Guo Yangyang,Mao Huibing,Chen Ye,Wang Jiqing,Fang Weifeng
With the excitation of a 978 nm laser, upconversion emission of the NaMgF 3 : Tm 3+ , Yb 3+ , Mn 2+ submicron particles include two red emission bands located at 648 and 698 nm and a green emission at about 510 nm in the visible range. The experimental results confirm that the Mn 2+ ions play the key role in the emission modulation between the 648 nm and 698 nm. The incident laser power dependence confirms that the emission at 648 nm is completely different from the emissions at 698 nm, and more than 3 photons are involved in the emission at 648 nm. With the doping of Mn 2+ ions, the intensity ratio R 1 / R 2 of the emission at 648 nm and 698 nm increases first, and decreases for the Mn 2+ concentration larger than 2%. The incident laser power and laser pulse-width also have evident modulation effect of the UC emissions. All the Mn 2+ related phenomena are due to the energy transfer paths ET5 and ET6 between the Tm 3+ and Mn 2+ ions. Graphical abstract
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CHEMICAL ENGINEERING JOURNAL
·
2015
·
IF 4.321
Zhiyong Mao,Jingjing Chen,Jian Li,Dajian Wang
Herein, blue–red synchronous emitting Ba 3 MgSi 2 O 8 :Eu 2+ , Mn 2+ nanocrystals matched well the photosynthetic action spectrum (PAS) of plant chlorophylls was fabricated on green emitting Sr 2 SiO 4 :Eu 2+ emitter covered entirely the photopic vision function (PVF) of human eyes, to construct Sr 2 SiO 4 :Eu 2+ -Ba 3 MgSi 2 O 8 :Eu 2+ , Mn 2+ dual-responsive composite phosphor. The micro-structure and blue–green–red tri-bands photoluminescence for the obtained composite phosphor were investigated in detail. White light emission with excellent dual-response characters to PAS of plant chlorophylls and PVF of human eyes was obtained, indicating the potential applications in both of general lighting and plant lighting.
研究领域:
材料科学
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光学材料
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植物生理学
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固态照明
·
光子学
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MOLECULES
·
2026
·Vol. 31
·期 15
·2648
·
IF 5.1
Lixia Yuan,Yanqing Zhang,Huimin Liu,Xiaowei Lu,Yue Wang,Zhining Yan,Min Liu
Advanced glycation end products (AGEs) are implicated in the pathogenesis of chronic diseases. This study investigated the inhibitory effect of theaflavin (TA) on AGE formation in a human serum albumin (HSA)-fructose model system, both in the absence and presence of non-cytotoxic Mg2+or Mn2+. The underlying mechanism was elucidated using multiple spectroscopic techniques and molecular docking. TA significantly inhibited AGE formation, with the enhancement by metal ions following the order: 1.5 μM Mn2+> 1.5 μM Mg2+> 1 mM Mg2+. This trend aligned with the binding affinity between HSA and TA derived from molecular interaction studies. Site marker competition and docking results revealed that TA binds preferentially within subdomain IIA of HSA. Furthermore, the conformational changes in HSA following glycation and inhibition were monitored, along with the influence of metal ions on the antioxidant activity of TA. By integrating the results, it was concluded that free radical scavenging contributes more significantly to AGE inhibition than does blocking the glycation sites on HSA. Overall, this study elucidates the influence of metal ions on the inhibitory effect of TA against AGE formation and the corresponding mechanism, providing insights for the prevention and management of chronic diseases.
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CURRENT APPLIED PHYSICS
·
2025
·
IF 3.1
Mengyu Guan,Ranran Bu,Haizhen Song,Changyuan Xu,Yichao Wang,Yan Zhang,Hongming Yin
Mn 2+ -based organic-inorganic hybrid metal halides were synthesized via evaporation crystallization using benzamide (BZM) and nicotinamide (NCM) as organic ligands. The DSC curve shows that the Mn 2+ -based organic-inorganic hybrid metal halides contain two crystal forms of BZM. Steady-state photoluminescence (PL) spectra reveal that the PL emission of Mn 2+ shifts from red to green as the crystal form of BZM changes. Density functional theory (DFT) calculation suggests that there is a certain rule between the transformation of BZM crystal form and the change of Mn 2+ luminescence characteristics.
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Zhichao Liu,Yuexiao Pan,Chengdong Peng,Yihong Ding,Hongzhou Lian,Jun Lin,Liyi Li
All-inorganic halide perovskites (AIHPs) have emerged as highly promising optoelectronic materials owing to their remarkable properties, such as high-optical absorption coefficients, photoluminescence efficiencies, and dopant tolerance. Here, we investigate the AIHPs K4CdCl6:Sb3+,Mn2+ that demonstrate hue-tunable white-light emission with an exceptional photoluminescence quantum yield of up to 97%. Through a detailed investigation, we reveal that efficient energy transfer from Sb3+ to Mn2+ plays a dominant role in the photoluminescence of Mn2+, instead of the conventional 4T1g → 6A1g transition of Mn2+. Thermodynamic analysis highlights the crucial role of a Cl-rich environment in obtaining the K4CdCl6 phase, while transformation from K4CdCl6 to KCdCl3 can be achieved under Cl-poor and K-poor conditions. The theoretical analysis reveals that defect Cli is more readily formed compared to defect VK, corroborating experimental findings that the K4CdCl6:Sb3+ phase is exclusively obtained when the solution contains HCl concentrations higher than 4 mol L–1. Our work provides valuable insights into the photoluminescence mechanism of Sb3+, defect engineering through heterovalent doping, and efficient energy transfer between Sb3+ and Mn2+ in K–Cd–Cl-based perovskites, which offers a new perspective for the design and development of novel AIHPs with superior optoelectronic performance.
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Analytical Methods
·
2023
·Vol. 15
·期 21
·2622-2630
·
IF 3.1
Liangyun Yu,Liangju Sun,Qi Zhang,Jingjing Zhang,Bairen Yang,Mingquan Huang,Yawen Zhou,Baocai Xu,Xiaoya Hu
This study developed an electrochemical sensor for the determination of Mn2+ in Chinese liquor by modifying a glass carbon electrode with TiO2-NH2@COFDPTB, which was synthesized via the controllable growth of COFDPTB onto the surface of TiO2-NH2 using the Schiff-base condensation reaction between 2,5-dimethoxyterephthalaldehyde and 1,3,5-tris(4-aminophenyl)benzene. The morphological and structural characterization studies of the proposed TiO2-NH2@COFDPTB were carried out by SEM, TEM, HRTEM, EDX, BET, XRD and FTIR techniques. Owing to the excellent properties and the synergism between TiO2 and COFDPTB, the introduction of TiO2-NH2@COFDPTB improved the electrochemical response significantly. By optimizing the experimental parameters, the sensor exhibited good linearity in the range of 0.1–1.0 nM and 0.08–10 μM with a detection limit of 2.83 × 10−11 M and 9.50 × 10−9 M, respectively, showing competitive performance for Mn2+ determination. Besides, the proposed sensor was successfully applied to Mn2+ detection in liquor samples, suggesting its practical application performance.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Guangtao Lu,Yichao Wang,Kailin Ma,Xizhi Chen,Wanying Geng,Tianshuo Liu,Sai Xu,Jinsu Zhang,Baojiu Chen
The research of narrow band green emitter with excellent luminescent property is regarded as a very significant innovation direction for light-emitting diodes (LED) backlights in liquid crystal displays (LCDs). Herein, a high-efficiency near-ultraviolet (n-UV) excitation Mn 2+ doped green phosphor NaGa 11 O 17 : Mn 2+ phosphor is obtained based on the strong charge transfer absorption located in the n-UV region. The optimal sample exhibits a high color purity green light emission(≈89.7%) centered at 505 nm with a full width at half maximum (FWHM) around 29 nm. The absorption efficiency (AE), internal quantum efficiency (IQE) and external quantum efficiency (EQE) of optimal sample are 69.8%, 80.4% and 56.1%, respectively. In addition, the doping of Al 3+ significantly improves the thermal stability (26.9%–80.1% at 150 °C) by enhancing the electron recombination process. Using NGO: Mn 2+ and commercial β-sialon:Eu 2+ dual green phosphors as green component fabricated with BAM: Eu 2+ , KSF: Mn 4+ and 310 nm LED chips shows a wide color gamut of 125% NTSC. These findings suggest that our material may find use in LED backlights for liquid crystal displays and provide a meaningful reference for the development of new narrowband emitters.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2016
·
IF 2.653
Keyi Cheng,Jianguo Zhang,Liping Zhang,Lun Wang,Hongqi Chen
A highly sensitive luminescent bioassay for the detection of Salmonella typhimurium was fabricated using Mn 2 + -doped NaYF 4 :Yb,Tm upconversion nanoparticles (UCNPs) as the donor and gold nanorods (Au NRs) as the acceptor and utilizing an energy transfer (LET) system. Mn 2 + -doped NaYF 4 :Yb,Tm UCNPs with a strong emission peak at 807 nm were obtained by changing the doped ion ratio. Carboxyl-terminated Mn 2 + -doped NaYF 4 :Yb,Tm UCNPs were coupled with S. typhimurium aptamers, which were employed to capture and concentrate S. typhimurium . The electrostatic interactions shorten the distance between the negatively charged donor and the positively charged acceptor, which results in luminescence quenching . The added S. typhimurium leads to the restoration of luminescence due to the formation of UCNPs-aptamers- S. typhimurium , which repels the UCNPs-aptamers from the Au NRs. The LET system does not occur because of the nonexistence of the luminescence emission band of Mn 2 + -doped NaYF 4 :Yb,Tm UCNPs, which had large spectral overlap with the absorption band of Au NRs. Under optimal conditions, the linear range of detecting S. typhimurium was 12 to 5 × 10 5 cfu/mL (R = 0.99). The limit of detection for S. typhimurium was as low as 11 cfu/mL in an aqueous buffer. The measurement of S. typhimurium in milk samples was satisfied in accordance with the plate-counting method, suggesting that the proposed method was of practical value in the application of food security.
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TALANTA
·
2017
·
IF 4.162
Liping Zhang,Bo Ling,Lun Wang,Hongqi Chen
An upconversion luminescence method was developed for the determination of glutathione (GSH), L -cysteine (Cys) or L -ascorbic acid (AA) based on redox reaction . We synthesized poly(acrylic acid) (PAA)-modified Mn 2+ -doped NaYF 4 :Yb,Tm upconversion nanoparticles (UCNPs), and the luminescence of these UCNPs was effectively quenched due to their carboxyl groups coordinating with Fe 3+ to form a UCNPs/Fe 3+ system. GSH, Cys or AA reduced Fe 3+ to Fe 2+ , which induced the luminescence recovery of the UCNPs. Under the optimized conditions, wide linear concentration ranges from 0.25-300 μM for GSH, 0.5–875 μM for Cys and 0.5–350 μM for AA were found, and the detection limits (3 S/K) were 0.2 μM, 0.5 μM and 0.2 μM, respectively. Thus, the UCNPs/Fe 3+ system was successfully applied for sensing GSH, Cys or AA.
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