Forests
·
2026
·Vol. 17
·期 6
·668
·
IF 3.1
Xianglian Jin,Zhen Zhang,Jing Ning,Ziying Liu,Chen Zhang,Ling Ma,Yanfen Zhang
Pine wilt disease poses a serious threat to pine forest health, and efficient biocontrol agents are urgently needed.Bacillus velezensisYG4-2 is a pine endophytic bacterium with strong nematicidal activity againstBursaphelenchus xylophilus, but the effect of oxygen conditions on its activity remains unclear. In this study, we compared the growth, nematicidal activity, and extracellular metabolite profiles of YG4-2 under aerobic and anaerobic conditions. Aerobic cultivation significantly increased bacterial biomass and enhanced the nematicidal activity of both bacterial cultures and cell-free supernatants. LC-MS/MS-based untargeted metabolomics revealed clear metabolic differences between the two oxygen conditions, with 19 metabolites significantly upregulated under aerobic conditions. Activity validation showed that kynurenic acid exhibited the strongest nematicidal activity among the tested candidate metabolites. Targeted LC-MS/MS further confirmed the accumulation of kynurenic acid in aerobic culture supernatants, with an estimated concentration of 0.38 ng/mL, and no obvious signal was detected under anaerobic conditions. These results suggest that oxygen enhances the nematicidal activity of YG4-2 by promoting growth and regulating extracellular metabolite production, with kynurenic acid as a potential oxygen-responsive active metabolite.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Chenxiang Li,Meng Li,Guozhuang Liu,Haoxiang Zhuo,Qian Li,Hui Zhang,Guoyao Pang,Xuan Yang,Zhou Liao,Kuan Wang,Dongniu Wang,Biwei Xiao,Dongsheng Geng
Layered P2-type sodium manganese oxide has emerged as a promising cathode candidate for sodium-ion batteries due to its appealing cost-effectiveness and high discharge voltage. However, its practical capacity within the voltage range of 2.0–4.0 V (vs Na+/Na) is relatively low, and its rate capability is hampered by the adverse charge/vacancy ordering during charge/discharge. In this study, a layered P′2/P3 mixed-phase Na0.8-aMn0.675Ni0.225Li0.1O2–x cathode with high (003) crystal plane intensity was designed by introducing oxygen vacancies to P2-structured materials. Aided by these advantages, the hybrid cathode material demonstrates impressive structural and thermal stability and faster Na-ion diffusion kinetics compared to a regular P2 material. Half-cell shows an initial discharge capacity retention of 101 mA h/g at 12 mA/g and 92.25% retention after 500 cycles at 120 mA/g. In combination with a hard carbon anode, the 0.5 A h pouch cell achieved a prevailing capacity retention of 95.2% after 2600 cycles at 36 mA/g. This work opens new dimensions for layered cathode materials with the aim of achieving superior cyclabilities.
研究领域:
材料科学
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电化学
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储能
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电池技术
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Hui-Hui Cao,Zhen-Hong He,Rui-Peng Yan,Xuanlu Fan,Weitao Wang,Kuan Wang,Huan Wang,Hui Ma,Xiaojuan Lai,Zhao-Tie Liu
Fe- and Cu-based catalysts are top candidates for the oxygen/hydrogen-evolution reactions, but their large-scale application is limited by rapid degradation under prolonged operation, especially at high current densities and high temperatures. Herein, a FeOOH/Cu(OH) 2 nanotube array grown on copper foil was designed for overall water-splitting. The structure enhances the electrochemical surface area, increases catalytic site density, and accelerates gas transport. DFT calculations confirms the Cu(OH) 2 and FeOOH synergy weakens HO–H bond, optimizing the ∗H adsorption energy, and driving reaction kinetics. In 1 M KOH, it achieves HER overpotentials of only 89 and 244 mV, and OER overpotentials of 124 and 424 mV at 10 and 100 mA cm −2 , respectively. Under industrial conditions (30% KOH, 65 °C), it sustains >2 A cm −2 for 100 h with negligible HER activity loss. This work provides a practical guide for designing high-activity, ultra-stable ampere-level water-splitting catalysts.
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Advanced Materials Interfaces
·
2022
·Vol. 9
·期 35
·2201688
·
IF 6.389
Liu-Qin Zhang,Hua-Li Li,Xiao-Hu Zhang,Qiu-Ping Li,Shu-Wen Luo,Fa-Qian Liu
Metal–organic gels or metallogels (MOGs), which usually made up with metal ions and organic ligands, are promising in the area of medicine, environment, and biology. Herein, a new metal–organic gel containing Cu + (Cu-MOG-5) is prepared at room temperature using 2-amino-5-mercapto-1,3,4-thiadiazole (AMT) and CuI. Considering the excellent low surface energy characteristics of polydimethylsiloxane (PDMS), the as-prepared Cu-MOG-5 is infused into porous PDMS to obtain Cu-MOG-5/PDMS coating, which combines the bactericidal properties of Cu + containing hydrogels and the low surface energy of PDMS. The morphology of the Cu-MOG-5 and Cu-MOG-5/PDMS coating is investigated by FE-SEM, and the structure of the new Cu-MOG-5 is verified by FT-IR, 1 H NMR, XPS, EDS, and elemental analysis. The antibiofouling properties are assessed using Escherichia coli ( E. coli ) and mussel. The results show that the newly prepared Cu-MOG-5/PDMS coating exhibits superior antibiofouling performance because of the synchronous action of hydrogel including Cu + and PDMS.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2023
·Vol. 415
·期 9
·1687-1698
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IF 4.3
Liu Cheng,Zheng Jingtian,Zhang Benxing,Zhong Xianhua,Wang Wei,Li Zhangyong
The Fenton reaction is one of the most effective methods for treating organic wastewater, which is extremely harmful to humans but difficult to treat. However, finding simple, low-cost, and efficient catalysts for the Fenton reaction remains a challenge. In this study, a BSA-Cu 3 (PO 4 ) 2 hybrid nanoflower (NF) was synthesized to investigate its peroxidase-like activity for the treatment of organic wastewater. Its morphology, composition, and crystallization had been fully studied and the results confirmed that the NFs were successfully prepared. Subsequently, the origin of the peroxidase-like activity of the NFs was further analyzed, with the results suggesting two reasons: (i) the transformation between Cu(I) and Cu(II) and (ii) nano-effects. Additionally, Congo red was selected as the organic pollutant to simulate the decolorization of wastewater. After 3 h, the decolorization efficiency reached 96%. Furthermore, the NFs exhibited good storage performance, maintaining approximately 90% relative activity after storage for 30 days. In summary, the NFs have great application prospects in the treatment of organic wastewater. Graphical abstract
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CRYSTENGCOMM
·
2022
·Vol. 25
·期 3
·432-443
·
IF 3.756
Yuping Li,Yang Tao,Yunping Zhoujin,Fang Zhao,Peng-Yu Liang,Sean Parkin,Tonglei Li,Pan-Pan Zhou,Sihui Long
Substituent size and isomerization play an important role in the polymorphism of 2-(naphthalen-n-ylamino)-benzoic acids (n = 1, 2; 2-NBAs) as each of the two previously investigated 2-NBAs was found to be polymorphic, while their parent compound fenamic acid (FA) has only one form discovered. 2-(Naphthalen-1-ylamino)-nicotinic acid (1) and 2-(naphthalen-2-ylamino)-nicotinic acid (2) (2-NNA) are isosteric compounds of 2-NBAs, and 2-(2,3-dimethyl-phenylamino)-nicotinic acid (3) and 2-(3,4-dimethyl-phenylamino)-nicotinic acid (4) are 2-NNA analogues with similar substitution patterns. All four compounds are clonixin analogues. The polymorphism of these four compounds was investigated. One solvent-free form (1-A) and one hydrate (1-H) were discovered for 1, three forms (2-I, 2-II, and 2-III) were obtained for 2, and one form was found for 3 and 4. The four systems were characterized by single-crystal XRD (SCXRD) and powder XRD (PXRD), and structural properties were compared among the crystals of the four compounds, their isosteres, and other related analogues. The phase behavior of the four systems was studied with differential scanning calorimetry (DSC). Thermogravimetric analysis (TGA) was used to investigate the dehydration of 1-H. Computational studies such as stable conformer search, π–π interaction energy calculation, and non-covalent interaction (NCI) analysis were performed to shed light on the rise of polymorphism, and the relative contribution of various intermolecular interactions to the overall stability of the crystals. The study confirmed the effect of substituent size, thus the consequent π–π interactions, on the hydrate formation of compound 1 and polymorphism of compound 2.
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FOOD AND CHEMICAL TOXICOLOGY
·
2023
·
IF 4.3
Yunyi Wang,Zhaolan Wei,Ke Xu,Xuan Wang,Xiao Gao,Qi Han,Shuwei Wang,Mingqing Chen
Nanoplastics have become ubiquitous in the global environment and have attracted increasing attention. However, whether there is an influence between exposure to nanoplastics and diabetes is unclear. To determine the effects of exposure to Polystyrene nanoplastics (PS-NPs) and evaluate the underlying mechanisms, mice were orally exposed to PS-NPs at dosages of 1, 10, 30 mg/kg/day for 8 weeks, alone or combined with a high fat diet and streptozocin (STZ) injection. Our data showed that exposure to 30 mg/kg/day PS-NPs alone induced a significant increase in blood glucose, glucose intolerance and insulin resistance. Combined with a high fat diet and STZ injection, PS-NPs exposure markedly aggravated oxidative stress , glucose intolerance, insulin tolerance and insulin resistance, and induced lesions in the liver and pancreas. PS-NPs exposure could decrease the phosphorylation of AKT and GSK3β, and treatment with SC79, a selective AKT activator, could increase the level of AKT and GSK3β phosphorylation, effectively alleviating the increase in ROS levels in the liver or pancreas, and slightly attenuating the increase in fasting blood glucose levels and insulin resistance induced by PS-NPs exposure. This showed that exposure to PS-NPs aggravated type 2 diabetes and the underlying mechanism partly involved in the inhibition of AKT/GSK3β phosphorylation.
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RESEARCH ON CHEMICAL INTERMEDIATES
·
2022
·Vol. 49
·期 1
·241-252
·
IF 3.134
Xing Qianqian,Zhao Jiancheng,Zhu Yulei,Hou Xianglin,Wang Yingxiong
5-Chloro-2-pentanone (5C2P) and its derivatives are widely utilized in the pharmaceutical and agrochemical industry. A new catalytic approach was proposed to convert 3-acetyl-1-propanol to 5C2P using bis(trichloromethyl)carbonate (triphosgene, BTC) as the efficient chlorine source. Various qualitative and quantitative nuclear magnetic resonance techniques ( 1 H, 13 C NMR), especially 1D selective gradient total correlation spectroscopy (Sel-TOCSY) and 2D heteronuclear single quantum correlation ( 1 H- 13 C HSQC) were used in the process. The reaction conditions, such as temperature, time, mole ratio, solvent as well as initiator were optimized. Experiment results showed that the yield of 5C2P reached a maximum of 97.93% in 1,2-dichloroethane at 80 °C after 2 h under the initiation of N,N-dimethylacetamide, and the optimal molar ratio of 3-acetyl-1-propanol to BTC was 1:0.4. The reaction mechanism was proposed and confirmed accordingly. Interestingly, an intermediate product of 1-(dimethylamino)ethyl carbonochloridate was observed, and its chemical structure was characterized by both Sel-TOCSY and 1 H- 13 C HSQC. This study enriched the catalytic reaction ways for the preparation of 5C2P.
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Nanomaterials
·
2022
·Vol. 12
·期 22
·3972
·
IF 5.719
Xue-Zhi Song,Yu-Hang Zhao,Fan Zhang,Jing-Chang Ni,Zhou Zhang,Zhenquan Tan,Xiao-Feng Wang,Yanqiang Li
The oxygen evolution reaction (OER) is kinetically sluggish due to the limitation of the four-electron transfer pathway, so it is imperative to explore advanced catalysts with a superior structure and catalytic output under facile synthetic conditions. In the present work, an easily accessible strategy was proposed to implement the plant-polyphenol-involved coordination assembly on Co(OH)2nanosheets. A TA-Fe (TA = tannic acid) coordination assembly growing on Co(OH)2resulted in the heterostructure of Co(OH)2@TA-Fe as an electrocatalyst for OER. It could significantly decrease the overpotential to 297 mV at a current density of 10 mA cm−2. The heterostructure Co(OH)2@TA-Fe also possessed favorable reaction kinetics with a low Tafel slope of 64.8 mV dec−1and facilitated a charge-transfer ability. The enhanced electrocatalytic performance was further unraveled to be related to the confined growth of the coordination assembly on Co(OH)2to expose more active sites, the modulated surface properties and their synergistic effect. This study demonstrated a simple and feasible strategy to utilize inexpensive biomass-derived substances as novel modifiers to enhance the performance of energy-conversion electrocatalysis.Keywords:Co(OH)2;tannic acid;electrocatalyst;OER;coordination assembly
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International Journal of Biological Sciences
·
2022
·Vol. 18
·期 16
·6008-6019
·
IF 10.75
Li Chao,Lv Li-fang,Qi-Li Mu-ge,Yang Rui,Wang Yu-jing,Chen Shuang-shuang,Zhang Ming-xiu,Li Tian-yu,Yu Tong,Zhou Yu-hong,Liang Hai-hai,Shan Hong-li,Li Xue-lian
Cardiac fibrosis is one of the common pathological processes in many cardiovascular diseases characterized by excessive extracellular matrix deposition. SerpinE2 is a kind of protein that inhibits peptidase in extracellular matrix and up-regulated tremendously in mouse model of cardiac fibrosis induced by pressure-overloaded via transverse aortic constriction (TAC) surgery. However, its effect on cardiac fibroblasts (CFs), collagen secretion and the underlying mechanism remains unclear. In this study, DyLight® 488 green fluorescent dye or His-tagged proteins were used to label the exogenous serpinE2 protein. It was showed that extracellular serpinE2 translocated into CFs by low-density lipoprotein receptor-related protein 1 (LRP1) and urokinase plasminogen activator receptor (uPAR) of cell membrane through endocytosis. Knockdown of LRP1 or uPAR reduced the level of serpinE2 in CFs and down-regulated the collagen expression. Inhibition of the endocytosis of serpinE2 could inhibit ERK1/2 and β-catenin signaling pathways and subsequently attenuated collagen secretion. Knockdown of serpinE2 attenuates cardiac fibrosis in TAC mouse. We conclude that serpinE2 could be translocated into cardiac fibroblasts due to endocytosis through directly interact with the membrane protein LRP1 and uPAR, and this process activated the ERK1/2, β-catenin signaling pathways, consequently promoting collagen production.
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VACUUM
·
2022
·
IF 4.11
Chang Xu,Jian Zhang,Huanjun Lu,Xiao Li,Jingchun Lv,Shaohui Zhang
In this work, one-dimensional (1D) conductive MOFs Ni 3 (HHTP) 2 with nanorod-like morphology on the surface of a woven fabric was synthesized by an in-situ growth method. Based on a three-electrode system, the effects of substrate concentration, scan rate and current density on electrode properties were investigated, respectively. The results showed that Ni 3 (HHTP) 2 @ woven fabric-3 (NHWF-3) demonstrated the largest area capacitance at 5 mV s −1 and reached up to 360 μF cm −2 at 20 μA cm −2 . Most importantly, the material still maintained 58.3% (210 μF cm −2 ) of the initially areal specific capacitance when the current density was increased 5 times to 100 μA cm −2 . According to the electrochemical impedance spectroscopy (EIS) curve, NHWF-3 has the smallest semicircle radius in the high-frequency region, indicating that it has the lowest internal transfer resistance and the best conductivity. Thus, this study provides a good example for the simple preparation and practical applications of conductive MOFs composites.
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MOLECULES
·
2023
·Vol. 28
·期 4
·1632
·
IF 4.6
Guozhu Ren,Danyang Zhang,Hao Wang,Xiaofang Li,Ruiping Deng,Shihong Zhou,Long Tian,Liang Zhou
The luminescent performances of near-infrared (NIR) lanthanide (Ln) complexes were restricted greatly by vibration quenching of X-H (X = C, N, O) oscillators, which are usually contained in ligands and solvents. Encapsulating Ln3+into a cavity of coordination atoms is a feasible method of alleviating this quenching effect. In this work, a novel ytterbium complex [Yb(DPPDA)2](DIPEA) coordinated with 4,7-diphenyl-1,10-phenanthroline-2,9-dicarboxylic acid (DPPDA) was synthesized and characterized by FT-IR, ESI-MS and elemental analysis. Under the excitation of 335 nm light, [Yb(DPPDA)2](DIPEA) showed two emission peaks at 975 and 1011 nm, respectively, which were assigned to the characteristic2F5/2→2F7/2transition of Yb3+. Meanwhile, this ytterbium complex exhibited a plausible absolute quantum yield of 0.46% and a luminescent lifetime of 105 μs in CD3OD solution. In particular, its intrinsic quantum yield was calculated to be 12.5%, and this considerably high value was attributed to the near-zero solvent molecules bound to Yb3+and the absence of X-H oscillators in the first coordination sphere. Based on experimental results, we further proposed that the sensitized luminescence of [Yb(DPPDA)2](DIPEA) occurred via an internal redox mechanism instead of an energy transfer process.Keywords:ytterbium complex;near-infrared luminescence;absolute quantum yield;luminescent lifetime;intrinsic quantum yield;internal redox mechanism
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