EUROPEAN JOURNAL OF SOIL SCIENCE
·
2024
·Vol. 75
·期 2
·e13464
·
IF 4
Yating Deng,Yun Zhang,Xinxin Zheng,Xiaoyang Cui
Forest fires are a primary driver of biogeochemical processes in ecosystems and affect the soil nutrient balance by altering the distribution of organic matter and associated nutrients as well as the composition and availability of elemental nutrients. We investigated the changes in soils’ phosphorus (P) fractions and the adsorption characteristics of potassium dihydrogen orthophosphate (orthoP) and myo -inositol hexakisphosphate (IHP) at two depths (0–5 and 5–10 cm) in soils from two sites differing in fire severity: long-unburned and heavily burned. Five years after the fire, there were increases in the total P and extractable inorganic P (H 2 O-P, NaHCO 3 -Pi, NaOH-Pi, D.HCl-Pi and C.HCl-Pi) contents. Conversely, there was a decrease in organic P (NaHCO 3 -Po, NaOH-Po and C.HCl-Po). The adsorption of soil for orthoP at a depth of 0–5 cm was dependent on the amount of P supplied by the soil; at low concentrations, heavily burned soil showed a lower adsorption than long-unburned soil. However, at high concentrations, the adsorption of heavily burned soil was significantly larger than that of long-unburned soil. With respect to IHP, the adsorption of long-unburned soil was also more significant at depths of 0–5 cm. The adsorption of both orthoP and IHP of heavily burned soil was significantly higher than that of long-unburned soil at a depth of 5–10 cm. Fire also decreased the binding degree (k 1 ) of soil-P and the solid phase at depths of 0–5 and 5–10 cm. The increase in P adsorption capacity outweighed the addition of P from ash, resulting in less leaching in heavily burned areas and minimizing P loss. Overall, forest fires significantly affect the adsorption characteristics and P fractions of soil, specifically orthoP and IHP, during the initial stage of postfire recovery. These effects are closely related to the direct influences of iron oxide, soil organic matter and aluminium oxide in the soil and may even produce relatively long-term effects on the P recycling process of the entire ecosystem.
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CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Wentian Li,Qingmin Kong,Min Guo,Linlin Wang,Peijun Tian,Jingyu Lu,Jianxin Zhao,Wei Chen,Gang Wang
This study was conducted to elucidate the effects of different degrees of substitution (DS) on the properties of propionylated and butyrylated starches and to investigate their efficacy and mechanisms in ameliorating autism-like phenotypes. Fourier transform infrared spectra of propionylated and butyrylated starches revealed the presence of the C O absorption peak at 1730 cm −1 . Additionally, as the DS increased, the surface of the starch granules became rougher, and the crystallinity decreased. Moreover, in vitro digestion tests demonstrated that propionylated and butyrylated starches with a DS of approximately 0.25 exhibited enhanced resistance to digestion. Animal experiments indicated that butyrylated starch significantly improved abnormal behaviors in autism-like rats and increased butyrate accumulation in the colon. Furthermore, butyrylated starch normalized aberrant expression of G protein-coupled receptor 41 and tryptophan hydroxylase 1 in the colon, promoting 5-hydroxytryptamine metabolism and suppressing the expression of ionized calcium binding adaptor molecule 1 and glial fibrillary acidic protein in the gut and brain. These findings demonstrate that butyrylated starch effectively alleviates autism-like phenotypes in rats, supporting strategies to mitigate autism and develop new applications for natural corn starch.
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Journal of Water Process Engineering
·
2025
·
IF 6.7
Yujian Liang,Zhihong Tu,Qi Wu,Xuezhen Zhang,Xiaomei Tan,Xuan Guan,Jinlan Zhao
To address the significant wastewater discharge from the printing and dyeing industry today, this study employed pyrite-activated persulfate (PS/pyrite) to induce advanced oxidation for the degradation of a representative azo dye, Reactive Black 5 (RB5), and conducted a comprehensive analysis of pertinent influencing factors. Leveraging pyrite's pH self-regulation capabilities, the pyrite/PS system demonstrated robust RB5 degradation across a broad pH spectrum of 3–9, achieving a degradation rate of approximately 96 %. Interestingly, due to the photocatalytic properties of pyrite, the degradation efficiency can be enhanced by 21 % with pyrite under illumination. Subsequently, the degradation of RB5 under illumination is further enhanced in PS/pyrite system, ultimately achieving a degradation rate of almost 100 %. The system maintained an acidic milieu and sustained the release of Fe 2+ , thereby fostering an optimal Fe 2+ /Fe 3+ cycle. In a simulated wastewater environment, the pyrite/PS system exhibited resilience against interference from NH 4 + , NO 3 − , and humic acid (HA), while exhibiting a synergistic catalytic effect with Fe 2+ and enhancing Fe 2+ /Fe 3+ cycling at elevated Cu 2+ concentrations. Electron paramagnetic resonance (EPR) tests and quenching experiments confirmed the generation of both hydroxyl radicals ( OH) and sulfate radicals (SO 4 − ), with SO 4 − serving as the primary radical species. Scanning electron microscopy (SEM) analysis identified rough microparticles as the primary sites for Fe 2+ release and reactivity. UV-spectrophotometry and visual assessment of pollutant discoloration indicated successful disruption of RB5's chromophore ( N N ) structure and naphthalene ring, achieving effective removal. The findings of this research offer valuable insights for the practical application of pyrite/PS systems in the treatment of printing and dyeing wastewaters.
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FUEL
·
2024
·
IF 6.7
Weizhen Xie,Yue Tang,Yiqiang Liu,Mengyuan Huang,Lu Lin,Xing Tang
In this study, Zr-based coordination polymers were synthesized via solvothermal method for the Meerwein-Ponndorf-Verley reduction of biomass-derived aldehydes and ketones. The morphology and strength of Lewis acid sites could be tuned by using different solvent during catalyst preparation. A 98.5 % yield of 2,5-bis(hydroxymethyl)furan (BHMF) was achieved at 100 °C using Zr-PDC/DMF-DCB, which was synthesized with pyridine-2,6-dicarboxylic acid (PDC) as ligand in a mixed solvent of N, N-dimethylformamide (DMF) and 1,2-dichlorobenzeneisopropanol (DCB) and exhibited moderate Lewis acid sites. Conversely, while Zr-PDC synthesized in alcohols (Zr-PDC/MeOH and Zr-PDC/EtOH) were used as catalysts, etherification products formed instead of BHMF. Further investigation into the role of solvents during catalyst preparation revealed that coordination between Zr sites and DMF increased the electron cloud density of Zr sites, thus weakening Lewis acidity. In addition, the inclusion of hydrophobic DCB resulted in the formation of spherical morphology, which improved resistance to carbon deposition and enhanced anti-agglomeration properties. This work presents a strategy for controlling acid strength and improving catalytic stability of coordination polymers.
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FUEL
·
2024
·
IF 6.7
Jianfei Luo,Langlang Wang,Yibing Xie,Ping Ning,Yiran Xiong,Hang Zhang,Yixing Ma,Shao Zhang,Xueqian Wang
Existing processes for transforming arsine (AsH 3 ) into toxic arsenic oxides (As x O y ) through catalytic oxidation do not meet economic requirements. In contrast, the catalytic decomposition method stands out due to its ability to both remove AsH 3 and obtain elemental arsenic (As 0 ) as a valuable product. A series of blank molecular sieves (HZSM-5, 13X, MCM-41, and TS-1) was applied to the catalytic decomposition performance of AsH 3 . At a catalytic decomposition temperature of 100 ℃, the HZSM-5 zeolite exhibited exceptional performance, achieving a D 90% value (the duration for which the AsH 3 removal efficiency remained above 90 %) exceeding 40 h. Moreover, up to 83.1 % of the product was As 0 . Comprehensive characterization revealed that the surface of the HZSM-5 zeolite contained a large number of strong acid sites, which played a key role in As 0 generation. In situ diffuse reflectance infrared spectroscopy further revealed the activation behavior of O 2 at the Brønsted acid sites on HZSM-5. To assess its suitability in industrial applications, the AsH 3 removal performance of the HZSM-5 molecular sieve was investigated in the presence of actual gas components (CO, H 2 S, PH 3 ). This study provides new ideas for the effective catalytic decomposition of AsH 3 and the recovery of valuable products in industry.
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Journal of Energy Chemistry
·
2024
·
IF 14
Peiyun Zhou,Haokun Pan,Guangtong Hai,Xiang Liu,Xiubing Huang,Ge Wang
In this work, nickel foam supported CeO 2 -modified CoBDC (BDC stands for terephthalic acid linker) metal-organic frameworks (NF/CoBDC@CeO 2 ) are prepared by hydrothermal and subsequent impregnation methods, which can be further transformed to NF/CoOOH@CeO 2 by reconstruction during the electrocatalytic test. The obtained NF/CoOOH@CeO 2 exhibits excellent performance in electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) because the introduction of CeO 2 can optimize the electronic structure of the heterointerface and accelerate the accumulation of *OH. It requires only a potential of 1.290 V RHE to provide a current density of 50 mA cm −2 in 1.0 M KOH + 50 mM HMF, which is 222 mV lower than that required in 1.0 M KOH (1.512 V RHE ). In addition, density-functional theory calculation results demonstrate that CeO 2 biases the electrons to the CoOOH side at the heterointerface and promotes the adsorption of *OH and *HMF on the catalyst surface, which lower the reaction energy barrier and facilitate the electrocatalytic oxidation process.
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MOLECULAR NEUROBIOLOGY
·
2025
·
IF 4.3
Yan Qian,Li Xiao-Jun,Wang Qi-Qi,Jia Wei,Wang Shu-Ling
Approaches of promoting a neural milieu permissive for plasticity and resilience against neuronal injury are important strategies for the treatment of a range of neurological disorders. Fibroblast growth factor 21 (FGF21) which is known for its role as a potent regulator of glucose and energy metabolism has also proved to be neuroprotective against various mental diseases. However, the underlying molecular mechanisms remain elusive. Here, we report a study of the neuroprotective effects of FGF21 by promoting 5-HT 1A R-FGFR1 heteroreceptor formation and triggering MEK 1/2 -ERK 1/2 signaling pathway in normal or abnormal neurological conditions. First, the in vitro cellular experiments demonstrated that FGF21 exerted a protective effect against glutamate-induced cytotoxicity and promoted cell differentiation and growth. Then, in wild-type and FGF21 −/− mice, exogenous FGF21 promoted FGFR1-5-HT 1A R heteromers formation in the CA3 and dentate gyrus region of the hippocampus and activated MEK 1/2 -ERK 1/2 signaling. Coordinately, FGF21 exerted similar influences in the hippocampi of IBA-induced neurological injury mice or combined stress-exposed mice. Besides, FGF21 treatment activated the phosphorylation of FGFR1 and elevated the expression of synaptophysin in these mice with neurological injury or combined stress exposure. These results illustrated that FGF21 alleviated neurological impairment through FGFR1-5-HT 1A R heteromer and ERK 1/2 signal activation and suggested that the regulation of FGFR1-5-HT 1A R heteromers and MEK 1/2 /ERK 1/2 pathway may play a key role in mediating the neuroprotective effects of FGF21 against various neurodegeneration conditions.
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JOURNAL OF CATALYSIS
·
2024
·
IF 6.5
Longyu Wang,Haibo Jin,Zhichang Liu,Suohe Yang,Guangxiang He,Haiyan Liu,Xianghai Meng,Chunming Xu
The formation mechanism and pathway of HMF from fructose dehydration were investigated using in-line FTIR monitoring and in-situ 13 C NMR in this study. The results of the infrared absorption spectrum obtained at different time intervals during the reaction process showed significant inconsistencies with the acyclic pathway. However, the in-situ NMR analysis revealed the direct observation of two intermediates, fructose furan and (4R-5R)-4-hydroxy-5-hydroxymethyl-4,5-dihydrofuran-2-formaldehyde, providing direct evidence to support the cyclic carbocation pathway. This study also included theoretical analysis of the intermediates involved in the key steps of various reaction pathways using density functional theory (DFT) calculations. The key steps in the cyclic pathway were found to have lower activation energy compared to the acyclic pathway, while exhibiting significant differences in electronegativity at the reaction sites. The computational results not only reveal but also provide support for the rationality of the cyclic formation mechanism. The response surface methodology (RSM) was utilized to optimize the preparation process of HMF through fructose dehydration. It enabled determination of the significance order for each factor (reaction temperature > reaction time > mass percentage of water in the solvent) and identification of the optimal process conditions (reaction time of 3.5 h, reaction temperature of 143.5 °C, mass percentage of water in the solvent of 5.0 %, and maximum yield of 5-HMF reaching 82.4 %).
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ACS Applied Energy Materials
·
2025
·
IF 5.5
Wen-jing Yao,Sheng Liao,Hao-yi Fu,Wen-yi Xu,Meng Xu,Dan Zhao,Chao Chen
The hydrophilic property of the catalytic interface has been seldom focused on particularly, although many green and sustainable catalysis transformations involve water. Addressing the issue, we prepared Dy–Ni–P catalysts for the 5-hydroxymethylfurfural oxidation reaction (HMFOR) to 2,5-furandicarboxylic acid (2,5-FDCA) in this work. The catalysts were clarified as (DyPO4)m/Ni2P composites with molar ratio m within 0.08–0.28 by ICP-OES, XRD, XPS, and HRTEM characterizations. The catalytic performance of samples was comprehensively analyzed by the HPLC technique, 1H NMR spectra, and various electrochemical tests, indicating that the introduction of DyPO4 in a proper amount (m = 0.16) would significantly enhance the catalytic efficiency versus singular Ni2P in terms of 2,5-FDCA yield (91 vs 26%), selectivity (99 vs 47%), and Faradaic Efficiency (F.E.: 98 vs 70%). The enhancements were accompanied by improved kinetic features such as the Tafel slope (53 vs 95 mV dec–1) and intrinsic activity (3.3 vs 1.7 mA cm–2). The boosting endowment (DyPO4)m/Ni2P stands among the top members of reported Ni-based HMFOR catalysts. The promoter effect of DyPO4 was further investigated by H2O-TPD, contact angle, zeta potential, OCP, and EIS measurements. It was testified that the nonhydrophilic Ni2P surface would be converted to a hydrophilic composite interface with the introduction of DyPO4; in line with the essential change, transfer of reactants and activation of water were obviously intensified with the lowered charge transfer resistance along the catalytic interface, which was responsible for the enhanced catalytic behavior of (DyPO4)m/Ni2P versus Ni2P. The above discovery made the topic regarding water indicate that the hydrophilic property of the catalytic interface played a significant role in facilitating heterogeneous catalysis transformations involving water; exampled by the current (DyPO4)m/Ni2P for HMFOR, rare-earth phosphate could be referred to as an outstanding hydrophilic promoter to innovate excellent catalysts for technology-important chemical engineering involving water.
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RSC Advances
·
2024
·Vol. 14
·期 34
·24942-24951
·
IF 3.9
Zhongyi Guo,Kang Fu,Jingyi Sun,Wenhao Du,Qisheng Hao,Xiao Hu
Nanodrug delivery systems (NDDS) have been proposed to improve the targeting and bioavailability of chemotherapy drugs. The approach of drug loading via physical adsorption is facile to operate; however, there exists a risk of premature leakage. Coupling the drug molecules with the carrier through chemical reactions can guarantee the stability of the drug delivery process, yet the preparation procedure is relatively intricate. In this research, a kind of Prussian blue nanocage (PB Cage) was fabricated, and the phase change material, 1-pentadecanol, was used as the gating material to solidify 5-fluorouracil (5-FU) inside the nanocage. Upon irradiation with near-infrared (NIR) light, the temperature of the PB Cage can rise rapidly. When the temperature exceeds 43 °C, 1-pentadecanol undergoes a solid–liquid phase transition and subsequently releases 5-FU to inhibit DNA synthesis. Meanwhile, the photothermal therapy (PTT) mediated by the PB Cage is also capable of ablating tumor cells. The NDDS constructed based on PB has achieved the precise release of 5-FU triggered by NIR light, which may avoid side effects on normal tissues. Moreover, the combination of chemotherapy and photothermal therapy can efficaciously suppress the proliferation of tumor cells.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Ne Ni,Ying Ouyang,Jianqiang Liu,Enhui Xing,Yibin Luo,Xingtian Shu
It was the thermostability and acidity of P precursors that influenced the interaction between P species and framework Al to determine the hydrothermal stability of P modified ZSM-5. With H3PO2 and NH4H2PO2 as P precursors, the P–Al interactions of P modified ZSM-5 samples calcined under different temperatures were systematically investigated by X-ray fluorescence, X-ray photoelectron spectroscopy, 27Al, and 31P MAS NMR spectroscopy, and temperature-programmed desorption of NH3 (NH3-TPD). With H3PO2 as the precursor, lower calcination temperature favored less self-polymerization of P species; however, obvious loss of phosphorus was observed during hydrothermal treatment. Conversely, higher calcination temperature tended to result in excessive interaction between P and framework Al for dealumination. Therefore, moderate interactions between P and framework Al were obtained over H3PO2 modified ZSM-5 calcined at 350 °C, which contributed to weaken the self-polymerization of P species. Compared with H3PO2, neutral NH4H2PO2 generated a relatively weaker P-zeolite interaction, which was less affected by the calcination temperature.
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Polymers
·
2018
·Vol. 10
·期 2
·137
·
IF 2.935
Peihong Li,Xiaoman Hou,Lijie Qu,Xueyan Dai,Chunling Zhang
Poly(N-isopropylacrylamide) (PNIPAM) is a widely-studied polymers due to its excellent temperature sensitivity. PNIPAM-MAPOSS hybrid hydrogel, based on the introduction of acrylolsobutyl polyhedral oligomeric silsesquioxane (MAPOSS) into the PNIPAM matrix in the presence of polyethylene glycol, was prepared via radical polymerization. The modified hydrogels exhibited a thick, heterogeneous porous structure. PEG was used as a pore-forming agent to adjust the pore size. MAPOSS reduced the swelling ratios of gels, and decreased the LCST, causing the hydrogels to shrink at lower temperatures. However, its hydrophobicity helped to improve the temperature response rate. The incorporation of rigid MAPOSS into the polymer network greatly increased the compressive modulus of the hydrogel. It is worth noting that, by adjusting the amount of MAPOSS and PEG, the hydrogel could have both ideal mechanical properties and swelling behavior. In addition, hydrogel containing 8.33 wt % MAPOSS could achieve stable and sustained drug release. Thus, the prepared PNIPAM-MAPOSS hybrid hydrogel can serve as drug carrier for 5-fluorouracil and may have potential application in other biomedical fields.Keywords:hybrid hydrogel;MAPOSS;mechanical properties;swelling;drug release
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