查找使用阿拉丁产品的科研文献

Alignment of polyaniline nanofibers on 3-D templates: “Hairy” hollow microspheres as high-performance pseudocapacitive materials

Peng Liu,Chao Yang,Xue Wang,Jinshan Guo,Baohua Hou

A facile method was developed for growing the alignment of polyaniline (PANI) nanofibers on three-dimensional (3-D) templates, via the chemical oxidative polymerization of aniline in dilute solution at 0–5   °C in presence of sulfonated polystyrene (SPS) microspheres and hydrochloric acid as template and dopant, respectively. Then the “hairy” PANI hollow microspheres were obtained after etching the templates with toluene. It was found that the formation of the “hairy” PANI hollow microspheres could be well controlled by altering the template concentration, thus the possible formation mechanism was deduced. The unique “hairy” PANI hollow microspheres prepared with the template concentration of 2.0   mg   mL −1 possessed the specific capacitance of 298   F   g −1 and the capacitance retention of 63.6% after 900 cycles.

Synthesis, Structure and Properties of Three New Polymers Based on 5-(Pyridin-3-yl)isophthalic Acid

Wu Kai-Fei,Jiang Fen,Xiao Han,Bai Xian-Li,Mo Shao-Yin,Feng Yu

Three new metal–organic complexes [Fe(pyip)(H 2 O) 2 ] n ( 1 ), [Co(pyip)(H 2 O) 2 ] n ( 2 ) and [Ni(pyip)(H 2 O) 2 ] n ( 3 ) have been synthesized and characterized based on the carboxylic acid with N donor ligand (H 2 pyip=5-(Pyridin-3-yl)isophthalic acid). X-ray structure analysis reveals that complexes 1 – 3 showed identical 3-D supramolecular architecture that adopt different metal center. They all crystallize in hexagonal space group P 6(5) and exhibited exclusive coordination mode. One of the H 2 pyip adopt bidentate chelate coordination mode and the other coordination carboxylate oxygen atom adopts the single dentate bridging mode. Moreover, the two novel complexes were characterized by IR spectrum, elemental analysis, fluorescent properties, thermogravimetric analysis and powder X-ray diffraction.

Application of Time-resolved Fluroimmunoassay for Determination of Furaltadone Metabolite 3-Amino-5-morpholinomethyl-2-oxazolidinone

Li-Hua DENG,Jin-Bo DAI,Zhen-Lin XU,Jin-Yi YANG,Hong WANG,Zhi-Li XIAO,Hong-Tao LEI,Yuan-Ming SUN,Yu-Dong SHEN

To detect furaltadone metabolite 3-amino-5-morpholinomethyl-2-oxazolidinone (AMOZ) in fish sample, a Eu 3+ labeling time-resolved fluoroimmunoassay (TRFIA) was developed. The experimental conditions were optimized as follows: the AMOZA-OVA concentration was 0.25 μg mL −1 ; the antibody was diluted by 50000 folds, and the competitive reaction time was 50 min. Under the optimal conditions, the method showed a detection limit of 0.01 ng mL −1 , an IC 50 of 0.26 ng mL −1 and a linear range (IC 20 −IC 80 ) of 0.025−2.83 ng mL −1 . The spiked recoveries of AMOZ in fish at three spiked levels ranged from 78.0% to 86.0%, and the relative standard deviations were less than 15%. Good correlation between ic-TRFIA and high performance liquid chromatography-tandem mass spectrometry was obtained for spiked food samples. The proposed ic-TRFIA method was suitable for the determination of AMOZ residue in food samples.

Thermal behavior of Al(NO3)3·9H2O and its application in preparing Al2O3 and regenerating HNO3

Shuyang Shi,Baozhong Ma,Ding Zhao,Xiang Li,Shuang Shao,Chengyan Wang,Yongqiang Chen

The new process ‘coal gangue/fly ash – HNO 3 pressure leaching (NAPL) –low-temperature pyrolysis’ was proposed by our team, which aimed to achieve the transformation of coal-based solid wastes from harmless to Al resource. For cost control, the regeneration of HNO 3 at a low cost was crucial for the process. Following NAPL of coal gangue and fly ash, massive amounts of Al(NO 3 ) 3 ·9 H 2 O were collected, with a decomposition temperature as low as 523 K. The energy consumption for low-temperature pyrolysis could be supplied by the combustion of residual carbon (6.96 wt%) during the thermal activity of coal gangue, allowing HNO 3 to be regenerated and recycled without extra heat supply . However, little research has been done on the pyrolysis behavior and kinetics of Al(NO 3 ) 3 ·9 H 2 O, which was examined in this study. The pyrolysis characteristics of Al(NO 3 ) 3 ·9 H 2 O were assessed by TG-DSC analysis. Further experiments and XRD/FTIR/MS analysis revealed that phase evolution of Al(NO 3 ) 3 ·9 H 2 O followed the sequence of Al(NO 3 ) 3 ·9 H 2 O→ Al(NO 3 ) 3 ·nH 2 O→ Al(NO 3 ) 3 ·3Al(OH) 3 ·5/2 H 2 O→ AlOOH→ Al 2 O 3 . Subsequently, the thermodynamic (∆ G , ∆ H , ∆ S ) and kinetic ( E a , A ) parameters were calculated based on the thermogravimetric data by the iso-conversional methods. And the mechanism models and functions were identified via the Malek method. Finally, the economic evaluation of pyrolysis indicated that 5.04 × 10 –3 Nm 3 of natural gas was consumed during pyrolysis of one mole Al(NO 3 ) 3 ·9 H 2 O, equivalent to 44.33 $ per ton of Al 2 O 3 . As a basic research of Al(NO 3 ) 3 ·9 H 2 O pyrolysis, this paper enhances related theories of the NAPL process.

Effects of hydrogen sulfide (H2S) on respiration control of state 3/4 in mitochondria from bovine heart

Y Su,Y Cheng,D Wang,F Zhang,Y Su,Z Li

Immunomodulation of nutritional formula containing epigallocatechin-3-gallate, ginseng extract, and polydextrose on inflammation and macrophage polarization

Wang Yi,Hu Yaozhong,Niu Zhenhua,Zhang Xuejiao,Fan Dancai,Ji Xuemeng,Lv Huan,Wang Shuo,Zhao Yanrong

Single nutrient likes polyphenol or dietary fiber have been exhaustively investigated to validate their positive intervention in health or disease. Meanwhile, the common interaction of inner systems with the nutrient complex has not been well elucidated, which raises the scientific issue of the modulatory effect of the nutrient complex on immunity. The representative prebiotics of epigallocatechin-3-gallate (EGCG), ginseng extract, and polydextrose (PDX) were selected on behalf of the classification of polyphenol, flavone or polysaccharides, and dietary fiber to generally cover the daily food intake in this study to explore their intervention in inflammation and macrophage polarization. The intervention of selected nutrients on inflammation and macrophage polarization has been evaluated against macrophages to unveil their comprehensive effects. The synergistic effect of selected nutrients was demonstrated by inhibiting M1 macrophage polarization and the promotion of M2 macrophage polarization. Then, the nutrient formula was set up to verify the intervention effect, and the results revealed the significant inhibition of cell inflammation and the effect on cell proliferation through promoting the cell cycle in the G2 phase. The nutrient complex could inhibit M1 macrophage polarization to inhibit M1-mediated inflammation and promote M2 macrophages for anti-inflammatory effect and enhance cell phagocytosis. Moreover, the varied intervention effects of the nutrient complex with different formulas could be summarized. In general, the formula containing EGCG, ginseng extract, and PDX was demonstrated to possess an enhanced immunomodulatory effect on cell inflammation and macrophage polarization, which could potentially inspire the investigation of complex nutrients in health and diseases.

Multi-scale dielectric loss engineering in (Ta2/3Ti1/3)2CTx MXene/sulfide heterostructures for electromagnetic wave attenuation

Shijie Zhang,Naqi Wang,Shun Wang,Li Tian,Panpan Wang,Xiaowei Liang,Airong Wang,Yupeng Shi,Zhiwei Zhao

A novel solid-solution (Ta 2/3 Ti 1/3 ) 2 CT x MXene/CuInS 2 heterostructure was constructed. • Multi-scale dielectric loss engineering was achieved through the synergisy of defects, heterointerfaces, and conductive networks. • The TTC/CS-3 composite delivered a broad EAB of 4.56 GHz at only 1.9 mm. • Interfacial charge redistribution and balanced impedance matching cooperatively enabled efficient EWs attenuation and radar stealth performance. The rational regulation of dielectric loss behavior and impedance matching remains a critical challenge for developing high-performance electromagnetic wave absorbers. Herein, a novel solid-solution (Ta 2/3 Ti 1/3 ) 2 CT x MXene/CuInS 2 (TTC/CS) heterostructure was successfully fabricated through a microwave-assisted solvothermal strategy. Benefiting from the intimate coupling between conductive MXene nanosheets and semiconductive CuInS 2 , a multi-scale dielectric loss engineering platform was established to simultaneously optimize electromagnetic attenuation capability and impedance matching characteristics. Structural analyses demonstrate the successful formation of abundant TTC/CS heterointerfaces accompanied by significant interfacial charge redistribution. The synergistic effects originating from intrinsic vacancies, surface functional groups, multi-cation configurations, and heterojunction interfaces generate abundant polarization centers and multiple dielectric relaxation processes. Meanwhile, the interconnected layered architecture promotes charge transport, conduction loss, and multiple reflections/scattering of incident electromagnetic waves. As a result, the optimized TTC/CS-3 composite exhibits superior electromagnetic wave absorption performance, delivering a broad effective absorption bandwidth (EAB) of 4.56 GHz at a thickness of only 1.9 mm. Electromagnetic parameter analysis reveals that the outstanding performance originates from the cooperative optimization of attenuation capability and impedance matching. Furthermore, radar cross-section simulations demonstrate significantly suppressed electromagnetic scattering behavior for the optimized composite. This work provides an effective strategy for constructing MXene-based heterostructures through multi-scale dielectric configuration and offers new insights into the design of lightweight, broadband, and highly efficient electromagnetic protection materials. A novel (Ta 2/3 Ti 1/3 ) 2 CT x MXene/CuInS 2 heterostructure was constructed for efficient electromagnetic wave dissipation. The synergistic integration of intrinsic defects, heterointerfaces, and interconnected conductive networks enabled multi-scale dielectric loss engineering, promoting interfacial polarization, charge transport, and multiple scattering. Download: Download high-res image (286KB) Download: Download full-size image

VMAT‐DAT‐Dopamine Regulatory System Involved in the Protective Effect of 3‐n‐Butylphthalide Against Ischemic Stroke

Xiao‐Ting Zhou,Qin Liu,Ming Chen,Ruo‐Xi Zhang,Yi‐Ling Su,Ding‐Feng Su,Ai‐Jun Liu

Proposed mechanism underlying NBP protection against ischemic stroke. NBP exerts neuroprotection against cerebral ischemic injury partially via upregulating the VMAT‐DAT‐dopamine cycle to improve synaptic dysfunction. Activation of D 1 R and adenosine A 1 Rs participates in the relevant downstream signalling cascades.

Carbon-rich carbon nitride for singlet-oxygen-driven photocatalytic degradation of benzophenone-3 and coral vitality recovery

Zhu Shien,Yang Xiaofei,He Di,Zhang Yanyan,Liu Hang,Zhou Xiaoyu,Su Dawei,Wang Guoxiu,Wang Tianyi,Wang Chengyin

Coral reefs, vital marine ecosystems, are increasingly threatened by global warming and chemical pollutants such as benzophenone-3 (BP-3), a widely used UV filter. To address this challenge, we present a carbon-doped graphitic carbon nitride (g-C 3 N 4 ) photocatalyst with efficient singlet oxygen ( 1 O 2 ) generation for BP-3 degradation and coral vitality restoration under simulated seawater conditions. The photocatalyst exhibits improved stability and photocatalytic performance in complex seawater environments, with enhanced charge separation and an approximately eightfold increase in the apparent degradation rate of BP-3 compared with pristine g-C 3 N 4 . Toxicity assessments indicate reduced ecological risks of degradation intermediates and significant recovery of zooxanthellae density and coral–algal symbiosis. Immobilized catalyst architectures further minimize material loss and provide a suitable substrate for coral attachment. In this work, we demonstrate a seawater-stable, 1 O 2 -driven photocatalytic strategy that enables efficient BP-3 removal and promotes coral vitality recovery, thereby offering a scalable approach for marine environmental remediation and coral ecosystem restoration.

Indole-3-acetic acid promotes wound healing of potato tubers by activating auxin signaling and phenylpropanoid metabolism

Lirong Yu,Tongtong Cui,Pengdong Xie,Botao Bai,Ruirui Yang,Ye Han,Yi Wang,Xin Li,Yang Bi,Dov Prusky

IAA increased endogenous auxin levels during tuber wound healing. • Auxin signaling genes were upregulated by IAA treatment. • IAA activated phenylpropanoid pathway genes and enzymes. • Formation of protective barrier was enhanced under IAA treatment. • IAA reduced weight loss and disease index in wounded tubers. Indole-3-acetic acid (IAA) is a major endogenous auxin, yet its involvement in closing layer formation at potato tuber wounds is not well defined. In this study, potato tubers (cv. Atlantic) were treated with IAA (100 mg L⁻¹) or N-1-naphthylphthalamic acid (NPA) (100 mg L⁻¹) and stored for up to 21 d during wound-healing, with samples collected at multiple time points. Transcriptome analysis showed that differentially expressed genes were mainly enriched in plant hormone signal transduction and phenylpropanoid biosynthesis pathways. IAA treatment significantly increased endogenous IAA accumulation and upregulated auxin biosynthesis and signaling genes, including StTAR2 and StYUCCA50 , as well as downstream signaling components such as StIAA29 , StARF8 , StGH3.6 , and StSAUR50 . Transcriptome and biochemical analyses showed that IAA enhanced phenylpropanoid metabolism, as evidenced by increased expression and activities of key enzymes, including phenylalanine ammonia-lyase (PAL), cinnamate 4-hydroxylase (C4H), 4-coumarate-CoA ligase (4CL), and cinnamyl alcohol dehydrogenase (CAD). Correspondingly, IAA promoted the accumulation of phenolic acids (cinnamic acid, caffeic acid, ferulic acid, and p -coumaric acid), lignin monomers, and total lignin, along with enhanced deposition of suberin polyphenolics and lignified cell layers at wound sites. In contrast, NPA treatment generally suppressed auxin accumulation, phenylpropanoid metabolism, and barrier formation. These coordinated molecular and metabolic changes were associated with reduced weight loss and lower disease index during storage. Correlation analysis further indicated strong associations among auxin-related responses, phenylpropanoid metabolism, barrier deposition, and healing performance. Collectively, these findings demonstrate that auxin-associated regulation is closely linked to phenylpropanoid activation and closing layer formation during potato tuber wound healing.

Alleviating the Potential Hysteresis of Na3.5MnCr0.5Ti0.5(PO4)3 Through Mo-Doping for High-Rate Sodium-Ion Batteries

Hongwei Zhang,Shan Wang,Ziqi Wen,Jingping Wang,Youlong Xu

Na 3.5 MnCr 0.5 Ti 0.5 (PO 4 ) 3 (NMCrTP) demonstrates significant development potential as a cathode material for sodium-ion batteries owing to its low cost and high discharge plateau. However, the severe potential hysteresis phenomenon caused by Mn·Na anti-site defects (Mn·Na-ASD) of Mn 2+ residing in Na vacancies is hindering its performance release. Here, a strategy is proposed to alleviate the anti-site defects in NMCrTP through doping Mo at the Ti sites using the sol–gel method. Rietveld refinement results confirm that the content of Mn·Na-ASD decreases from 6.30% in NMCrTP/C to 0.98% in NMCrTP/C-0.05Mo. Meanwhile, Hall effect measurements verify that the Mo donor induces the carrier-type transformation from p-type to n-type, enhancing electronic conductivity from 3.07 × 10 −3 to 3.61 × 10 −3 S cm −1 . Moreover, the ion diffusion coefficient measured by GITT increases from 3.96 × 10 −12 to 1.34 × 10 −11 cm 2 /s. In result, the mean discharge potential of the NMCrTP/C-0.05Mo cathode increases from 2.62 V (vs. Na + /Na) to 3.47 V, and the electrochemical polarization decreases from ΔV = 0.20 to 0.09 V. As expected, the NMCrTP/C-0.05Mo cathode delivers an excellent rate performance of 88.4 mAh g −1 at a high rate of 10 C. This work presents an effective strategy to alleviate the potential hysteresis of the NMCrTP cathode for high-rate SIBs.

Loganic Acid Ameliorates Rheumatoid Arthritis via the Lactobacillus murinus-Inodole-3-Acetic Acid–AhR–IL-10 Axis

Weiling Tan,Yufang Fu,Wanyu Hu,Yating Lin,Jingni Cai,Xuelin Huang,Yinyi OuYang,Sheng Lin,Ling Ye

Loganic acid (LA), a major iridoid glycoside from Gentiana macrophylla Pall., possesses anti-inflammatory and immunomodulatory properties, but its therapeutic potential in rheumatoid arthritis (RA) and its interaction with the gut microbiota remain poorly defined. Here, we show that LA markedly and dose-dependently attenuates disease severity in collagen-induced arthritis mice, as evidenced by reduced clinical arthritis scores, systemic inflammatory cytokines, and synovial tissue damage. LA reshaped the gut microbiota, and fecal microbiota transplantation from LA-treated donors partially reproduced its protective effects, indicating a causal contribution of the altered microbial community. In particular, LA selectively enriched OTUs annotated as Lactobacillus murinus ( L. murinus ) and increased levels of the microbial tryptophan metabolite indole-3-acetic acid (IAA). Both LA and IAA activated aryl hydrocarbon receptor (AhR) signaling, suppressed tumor necrosis factor-α-induced inflammatory responses in human synoviocytes, and, in vivo, enhanced IAA–AhR–interleukin-10 (IL-10) signaling in arthritic joints. Pharmacological inhibition of AhR with CH223191 substantially reversed LA's therapeutic effects, demonstrating that AhR signaling plays a critical role in its anti-arthritic activity. Collectively, these findings demonstrate that LA protects against RA through a dual mechanism: direct activation of AhR in joint tissues and indirect reinforcement of AhR signaling through an L. murinus -associated microbial IAA axis. This study highlights a gut microbiota–metabolite–AhR pathway as a key mediator of LA's anti-arthritic effects and supports LA as a promising microbiota-informed therapeutic candidate for RA.