JOURNAL OF PLANT BIOLOGY
·
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.
研究领域:
植物学
·
遗传学
·
分子生物学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 49
·期 7
·10273-10279
·
IF 5.532
Daiyuan Liu,Ting Wang,Yichun Liu,Chao Wang,Zhichao Liu,Xiaodie Zhu,Ya Liu,Jian Zhang,Zhaowei Teng,Yang Zhong,Yakovlev Alexey Nikolaevich,Xuhui Xu
The photoluminescence behavior of inorganic phosphors is generally influenced by thermal stability, which determines the luminescence efficiency of the corresponding devices. Here, a series of Eu 2+ , Mn 2+ co-doped LiAl 5 O 8 blue-green-emitting phosphors with thermal robust are successfully fabricated. The concentration-dependent emission spectra and the decay curves of the as-obtained LiAl 5 O 8 : Eu 2+ , Mn 2+ samples manifest the occurrence of the energy transfer from Eu 2+ to Mn 2+ ions via dipole-dipole interaction, and the corresponding emitted colors are gradually modulated from blue to green under the excitation of 310 nm. Moreover, the zero-thermal-quenching luminescence is observed when the operation temperature is up to 423 K, which is attributed to the energy release from the trapping centers to emitting centers (Eu 2+ and Mn 2+ ) at high temperature. Furthermore, a warm white light-emitting diodes (WLEDs) device with correlated color temperature of 5061 K, a color rendering index of 80.6 and long-term stability is fabricated by combining UV LED chip (λ ex = 310 nm), as-obtained LiAl 5 O 8 : Eu 2+ , Mn 2+ phosphor, commercially available red phosphor and green phosphor. These results prove the potential application of the as-obtained LiAl 5 O 8 : Eu 2+ , Mn 2+ phosphor for UV-pumped WLEDs devices.
研究领域:
材料科学
·
发光材料
·
固态化学
·
光电子学
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无机化学
·
器件物理
·
纳米材料
✓ 已验证
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2021
·Vol. 40
·期 11
·1691-1698
·
IF 3.712
Qingsong Hu,Zaifa Pan,Guijie Liang
White light-emitting diodes (WLEDs) fabricated by single-phase full color emitting phosphor are an emerging solution for health lighting. The crystallographic site occupation of activators in a proper host lattice is crucial for sophisticated design of such phosphor. Here, we report a high quality white light-emitting phosphor Ba 2 Ca(BO 3 ) 2 :Ce 3+ (K + ),Eu 2+ ,Mn 2+ with spectral distribution covering whole visible region. Blue light emission originates from Ce 3+ ions occupying preferentially Ba 2+ site by controlling synthesis conditions. Green and red lights are obtained from Eu 2+ occupying Ba 2+ (and Ca 2+ ) site and Mn 2+ occupying Ca 2+ site, respectively. In this triple-doped phosphor, strong red emission with a low concentration of Mn 2+ is realized by the efficient energy transfer from Ce 3+ and Eu 2+ to Mn 2+ . Furthermore, high quality white light is accomplished by properly tuning the relative doping amount of Ce 3+ (K + )/Eu 2+ /Mn 2+ based on efficient simultaneous energy transfer. The results indicate that Ba 2 Ca(BO 3 ) 2 :Ce 3+ (K + ),Eu 2+ ,Mn 2+ is a promising white light-emitting phosphor in WLEDs application.
研究领域:
材料科学
·
无机化学
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发光材料
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固态照明
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能源材料
✓ 已验证
DOI
高影响因子
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.
研究领域:
分析化学
·
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LUMINESCENCE
·
2023
·Vol. 38
·期 9
·1639-1646
·
IF 2.9
Baisen Chen,Rongxia Tan,Yufei Hu,Gongke Li
Forchlorfenuron is a low-toxic phenylurea plant growth regulator. Excessive intake of forchlorfenuron can lead to metabolic disorders of the matrix and be harmful to human health. The chemiluminescence intensity of the KIO 4 –K 2 CO 3 –Mn 2+ reaction decreased in the presence of forchlorfenuron. Based on this result, a rapid and sensitive chemiluminescence method was established to determine forchlorfenuron by combining it with a batch injection static device. The injection speed, injection volume and reagent concentration of the forchlorfenuron–KIO 4 –K 2 CO 3 –Mn 2+ chemiluminescence reaction were optimized. Under these optimized conditions, the linear range of the method was 1.0–200.0 μg/L, and the limit of detection was 0.29 μg/L (S/N = 3). The chemiluminescence method for the determination of forchlorfenuron could be completed in 10 s. The method was applied to detect the residual forchlorfenuron in dried fruit samples, and the results are consistent with high-performance liquid chromatography-mass spectrometry. This method has the advantages of high sensitivity, rapid response, less reagent consumption, and convenient operation. It will provide a new perspective for chemiluminescence for the rapid and sensitive determination of forchlorfenuron in various complex samples.
研究领域:
分析化学
·
食品安全
·
植物生长调节剂检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Energy
·
2021
·
IF 7.311
H. Chen,S. Cai,Y. Wu,W. Wang,M. Xu,S.-J. Bao
Rechargeable aqueous zinc-manganese oxide (Zn/MnO 2 ) batteries using Mn 2+ as the electrolyte additive have recently attracted remarkable attention owing to their largely improved cycling stability. Herein, we find that the Zn/MnO 2 batteries with Mn 2+ additive still exhibit rapid capacity fading when cycling between 0.8 and 1.6 V vs. Zn/Zn 2+ , its improved performance is only observed when charged to a higher slope region (>1.6 V), which suggests that the improved performance of Mn 2+ added Zn/MnO 2 is not caused by suppressing the dissolution of MnO 2 cathode. Inspired by this discovery, successive electrochemcial conversion reactions are scrutinized and proved for evaluating the performance of the Zn/MnO 2 batteries after using Mn 2+ as the electrolyte additive. By adding a certain amount of Mn 2+ into the electrolyte, the battery can improve the capacity and cycling abilitily through converted electrodepostion of Mn 2+ . Specifically, the zinc sulfate hydroxide hydrate (Zn 4 SO 4 ·(OH) 6 ·4H 2 O) large-flake can initiate the generation of zinc vernadite nanosheets (Zn x MnO(OH) y ) during the charge process (around 1.5 V vs. Zn/Zn 2+ ), and then the zinc vernadite nanosheets can reversibly re-back to Zn 4 SO 4 ·(OH) 6 ·4H 2 O during the discharge process. Importantly, part of zinc vernadite nanosheets irreversibly transform into tunnel-like MnO 2 nanocrystalline material when charging higher than 1.6 V vs. Zn/Zn 2+ , which can improve the specific capacity of Zn/MnO 2 batteries in subsequent cycles and then make the Zn/MnO 2 batteries exhibit excellent cycles stability. Finally, through a special zinc/carbon nanotube (Zn/CNT) battery, this successive electrochemcial conversion reactions are further verified.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Tang Qiyue,Xia Hongbo,Wu Zikang,Liu Rongjie,Qi Wenlin,He Wentao,Yang Yuqin
Cesium lead halide perovskite nanocrystals (CsPbX 3 NCs) doped with Mn 2+ brings attractive long-wavelength emission and flexible color tunability. However, modulating the exciton-to-Mn 2+ energy transfer efficiency poses a challenge, particularly when relying on traditional methods such as changing halogen composition or incorporating external cations, which often complicate the process. In this work, a simple photonic bandgap (PBG)-modulation strategy is applied to modulate the exciton-to-Mn 2+ energy transfer by constructing a sandwich “PC-Perovskite-PC” structure with two photonic crystal (PC) films and Mn 2+ doped CsPb(ClBr) 3 NPs. When the PBG and the host emission band change from deviation to coincidence, the lifetime of Mn 2+ decreases from 0.54 ms to 0.36 ms owing to the enhancing energy transfer efficiency by PBG effect. Meanwhile, the ratios of orange and blue emissions (O/B) increase from 1.36 to 1.6. In addition, the back energy transfer also can be modulated. When the PBG matches well with the Mn 2+ emission band, the lifetime of the host emission exhibits the largest value (1.25 ns) owing to back energy transfer from Mn 2+ the host. Meanwhile, the O/B value shows the smallest value (0.52) attributed to the decreased spontaneous radiation of Mn 2+ and the enhanced host emission. When PBG deviates from the Mn 2+ emission band, the lifetime of the host emission decreases but O/B value increases gradually. This work provides new strategy for the modulation of energy transfer in Mn 2+ doped CsPb(ClBr) 3 NPs.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2017
·
IF 3.473
Yanshen Li,Ankang Zhao,Chunyan Chen,Cuimiao Zhang,Jinyu Zhang,Guang Jia
A variety of uniform and well-dispersed one-dimensional Zn 2 GeO 4 :Mn 2+ phosphors have been synthesized via a facile solvothermal process with H 2 O/EG as solvent. During the synthesis process, the component of solvent and the addition of PEG surfactant play an important role in determining the structure, particle size, and morphology of the final product. Under ultraviolet light excitation, the pure Zn 2 GeO 4 sample shows bluish-white emission which is attributed to the native defects present in the Zn 2 GeO 4 host. When Zn 2+ ions are partially substituted by Mn 2+ , the as-synthesized Zn 2 GeO 4 :Mn 2+ samples exhibit intense green emission that corresponds to the d-d transition ( 4 T 1 → 6 A 1 ) of Mn 2+ ions. The luminescence mechanisms of the Zn 2 GeO 4 :Mn 2+ samples were investigated in detail by using the CASTEP code based on density functional theory (DFT). It is expected that the as-synthesized Zn 2 GeO 4 :Mn 2+ phosphors can be potentially applied in lighting, optical displays, and optoelectronic devices .
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 14
·8233-8243
·
IF 3.119
Jun'an Lai,Zhangwen Long,Jianbei Qiu,Dacheng Zhou,Qi Wang,Yong Yang,Songhan Hu,Zhe Wang,Ke Zhang
Latent fingerprints (LFPs) are important evidence in crime scenes and forensic investigations, but they are invisible to the naked eye. In this work, a novel fluorescent probe was developed by integrating a narrow-band-emitting green afterglow phosphor, SrGa12O19:Mn2+ (SGO:Mn), and ethyl cellulose (EC) for the efficient visualization of LFPs. The hydrophobic interactions between the powder and lipid-rich LFPs made the ridge structures more defined and easily identifiable. The background fluorescence of the substrates was completely avoided because of the time-gated fluorescence of the afterglow phosphor. All the three levels of LFP degrees were clearly imaged due to the high sensitivity. Moreover, the SGO:Mn–EC powder was highly stable in neutral, acidic, and alkaline environments. In addition, 60 day-aged LFPs were successfully visualized by the powder. All performances showed that this strategy for LFP recognition has merits such as low cost, non-destructive nature, reliability, superior universality, and legible details. Together, these results show the great application prospects of this powder in forensic identification and criminal investigation.
研究领域:
材料科学
·
法医学
✓ 已验证
DOI
PubMed
高影响因子
ANALYTICAL BIOCHEMISTRY
·
2024
·
IF 2.6
Xinrui Feng,Qinwei Xu,Yan Liu,Sijia Wang,Yong Cao,Chen Zhao,Shuai Peng
Deoxynivalenol (DON) is a common mycotoxin in food that mainly pollutes grain crops and feeds, such as barley, wheat and corn. DON has caused widespread concern in the field of food and feed safety. In this study, a colorimetric immunoassay was proposed based on the aggregation of gold nanoparticles (AuNPs) due to the decomposition of Mn 2+ from gold-coated manganese dioxide (AuNP@MnO 2 ) nanosheets. In this study, 2-(dihydrogen phosphate)- l -ascorbic acid (AAP) was hydrolyzed by alkaline phosphatase (ALP) and converted to ascorbic acid (AA). Then, AuNP@MnO 2 was reduced to Mn 2+ and AuNPs aggregation occurred. Using the unique optical characteristics of AuNPs and AuNP@MnO 2 , visible color changes realized simple detection of DON with high sensitivity and portability. With increasing DON content, the color changed more obviously. To quantitatively detect DON, pictures can be taken and the blue value can be read by a smartphone. The detection limit (Ic10) of this method was 0.098 ng mL −1 , which was 326 times higher than that of traditional competitive ELISA, and the detection range was 0.177–6.073 ng mL −1 . This method exhibited high specificity with no cross-reaction in other structural analogs. The average recovery rate of DON in corn flour samples was 89.1 %–110.2 %, demonstrating the high accuracy and stability of this assay in actual sample detection. Therefore, the colorimetric immunoassay can be used for DON-related food safety monitoring.
研究领域:
食品科学
·
分析化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2019
·Vol. 7
·期 8
·1801435
·
IF 7.125
Jun Zhou,Ximing Rong,Peng Zhang,Maxim S. Molokeev,Peijia Wei,Quanlin Liu,Xiuwen Zhang,Zhiguo Xia
The halide double perovskite family represented by A 2 (B + ,B 3+ )X 6 can overcome the lead toxicity and enable generally large band gap engineering via B/B sites' transmutation or exotic dopants to fulfill the emerging applications in the optoelectronic fields. Herein, the design and the experimental synthesis of a new family of Mn 2+ -doped Cs 2 NaBi 1- x In x Cl 6 crystals with an intense orange-yellow emission band are reported, and the phase formation stability is discussed via a combined experimental–theoretical approach. Depending on the manipulation of Bi 3+ /In 3+ combination, the band gap increases with In 3+ content, and a subsequent evolution from indirect to direct band gap is verified. First-principles calculations and parity analyses indicate a parity forbidden effect on Cs 2 NaInCl 6 , and a combination effect of absorption on Cs 2 NaBi 1- x In x Cl 6 from both Cs 2 NaBiCl 6 and Cs 2 NaInCl 6 . The associated Mn 2+ -doped photoluminescence depending on the Bi 3+ /In 3+ substitution is also addressed from the variation of the different Mn–Cl environment and neighboring-cation effect.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2024
·Vol. 39
·期 14
·1989-1998
·
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
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）