ENVIRONMENTAL TECHNOLOGY
·
2025
·
IF 2
Li Hua,Meiting Wang,Xinlong Wei
Microplastics (MPs) can coexist with pesticides in soil for a long period, forming combined pollution. Brassica chinensis L was used as the test plant and the differences in the effects of traditional microplastic polyethylene (PE MPs) and biodegradable microplastic polylactic acid (PLA MPs) alone and combination with cypermethrin pesticide on plants were studied. The results showed that the inhibitory effect of the PLA MPs on Brassica chinensis L was greater than PE MPs and that the inhibitory effect of microplastics in combination with cypermethrin pesticides was greater than that of microplastics alone. Brassica chinensis L avoided oxidative damage by increasing the stress level at a low PE MP concentration (2%) and the antioxidant defense capability gradually weakened as the concentration increased. As the concentration of PLA MPs increased, the oxidative damage of plant roots was further aggravated. The biomass and quality of Brassica chinensis L showed the pattern of ‘low promotion and high inhibition’ whether PE MPs were treated alone or combined with cypermethrin pesticides. While PLA MPs treatment groups showed a pattern of ‘stronger inhibition with increasing microplastic concentration’.
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DOI
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高影响因子
PREPARATIVE BIOCHEMISTRY & BIOTECHNOLOGY
·
2025
·
IF 1.9
Xiao-Liang Zhao,Kai-Li Qi,Hui Han,Hai-Dong Wen,Yan-Mei Liu,Qing-Song Zhou,Yuan-Yuan Ma,Cun-Jin Wang,Jing Zhang,Ji Zhang,Wei-Jie Zhang
Olive pomace, a by-product of olive oil production, remains underexplored despite its potential environmental and economic benefits. This study sequentially extracted three polysaccharides (OERC, OERH, and OERA) from olive pomace using water at room temperature, hot water (80 °C), and 2% Na2CO3 solution (60 °C). Characterization through UV–Vis spectroscopy, Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis, high-performance liquid chromatography, and Congo red experiment revealed that these polysaccharides are heteropolysaccharides primarily composed of glucose, mannose, rhamnose, and galactose, each with distinct molar ratios. The polysaccharides exhibited significant antioxidant activity by scavenging hydroxyl, DPPH, and superoxide radicals, with OERC showing the highest potency. They also repaired H2O2-induced oxidative damage in HepG2 cells, with OERC at 400 μg/mL and OERH/OERA at 200 μg/mL displaying optimal efficacy. Additionally, these polysaccharides effectively inhibited α-glucosidase activity, enhanced glucose consumption, and increased glycogen content in insulin-resistant models, thereby exerting hypoglycemic effects. Furthermore, they promoted proliferation, phagocytosis, and nitric oxide release in RAW264.7 macrophages, demonstrating immunomodulatory effects. These results indicate that sequential extraction under varying conditions is an effective method for preparing polysaccharides. The three polysaccharides isolated in this study show great potential for development as functional products with antioxidant, hypoglycemic, and immunomodulatory applications.
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高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Ting Yu,Jiahao Wan,Jingye Yang,Xiaokang Luo,Man Xie,Lehui Liu,Hongming Liu
The discovery of novel organic–inorganic hybrid nonlinear optical (NLO) crystal materials holds great potential in advancing laser science and technology as they offer a wide range of benefits including easy synthesis, structural versatility, and high hyperpolarizability. Herein, the integration of l-tartaric acid (L-C4H6O6) and ZnSO4 gave rise to two acentric Zn-based organic–inorganic hybrid crystals, namely, Zn2(H2O)2(C4H4O6)2·3H2O (Zn-LT) and Zn2(H2O)(C4H4O6)(C4H6O6)(SO4)·4H2O (Zn-LTS). They both feature layered structures constructed by [ZnO6] octahedron, l-C4H6O6/l-C4H4O62–, water molecule, or [SO4] tetrahedron. Interestingly, they possess moderate second-order NLO effects of 0.28 × KH2PO4 (Zn-LT) and 0.57 × KH2PO4 (Zn-LTS), large birefringence of 0.075 (Zn-LT) and 0.069 (Zn-LTS), suggesting that the introduction of [SO4] groups with intrinsically weak polarizability and weak optical anisotropy induces the enhancement of the NLO effect while without reducing birefringence much. In addition, both of them display UV cutoff edges near 210 nm, indicating their potential as NLO crystals applied in the UV and solar-blind region.
研究领域:
材料科学
·
光学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2017
·
IF 6.065
Shuyan Zhao,Tao Zhou,Bohui Wang,Lingyan Zhu,Meng Chen,Dandan Li,Liping Yang
Perfluorooctane sulfonamide (PFOSA) is a precursor of perfluorooctane sulfonic acid (PFOS) and can be broken down to PFOS in environment and biota. In the present work, PFOSA was spiked in soil and its biodegradation in soil, uptake and metabolism in wheat ( Triticum aestivum L.) and earthworms ( Eisenia fetida ) were investigated. The results indicated that PFOSA could be biodegraded to highly stable PFOS, which has the same perfluorinated carbon chain length as PFOSA, by microbes in soil. PFOSA could be taken up by wheat root and earthworm from soil with higher bioaccumulation ability than PFOS. In both wheat and earthworms, PFOSA also degraded to PFOS. However, other shorter-chain perfluoroalkane sulfonates (PFSAs), including perfluorohexane sulfonate (PFHxS) and perfluorobutane sulfonate (PFBS), were observed in wheat, but not in soil and earthworms, suggesting that wheat displayed distinctly different degradation mechanisms to PFOSA from soil microbes and earthworms.
研究领域:
环境科学
·
植物学
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DOI
高影响因子
ORGANOMETALLICS
·
2014
·
IF 4.253
Lei Li,Bo Liu,Dongtao Liu,Chunji Wu,Shihui Li,Bo Liu,Dongmei Cui
A series of aluminum complexes LaAl2Me4 (1), Lb2Al4Me4 (2), and LcAl2Me4 (3) have been prepared from the reaction of AlMe3 with Salan- and Salen-type ligands (LaH2 = [2-OH-3,5-tBu2-C6H2CH2N(CH3)]2-(m-phenylene); LbH4 = [2-OH-3,5-tBu2-C6H2CH2NH]2-(m-phenylene); LcH2 = [2-OH-3,5-tBu2-C6H2CH═N]2-(m-phenylene)), respectively. All these complexes were characterized by NMR spectroscopy, X-ray diffraction, and elemental analyses, with complexes 1 and 3 adopting binuclear structures, while complex 2 being tetranuclear. In the presence of alcohol, the binuclear complexes 1 and 3 catalyzed controlled ring-opening homopolymerizations of both ε-CL and l-LA. In the copolymerization experiments, complexes 1 and 2 produced tapered copolymers of ε-CL and l-LA, while complex 3 was able to provide ε-CL-co-l-LA with tendentially random structure indicated by the average lengths of the caproyl and lactidyl sequences (LCL = 1.4; LLA = 2.6). Particularly, addition of excess alcohol into the catalytic system of complex 3 established the first “immortal” copolymerization of ε-CL/l-LA, which accelerated the polymerization rates of both monomers and, thus, afforded random copolymers with predictable molecular weights and narrow molecular weight distributions.
研究领域:
高分子化学
·
有机金属化学
·
催化化学
·
材料科学
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DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2017
·Vol. 77
·期 3
·628-637
·
IF 1.197
Guo Shuangzhen,Zhang Jian,Li Xianlong,Zhang Fan,Zhu Xixi
A novel core-shell bio-adsorbent was fabricated by using biological materials for removing methyl orange (MO) from aqueous solution. The structure characteristics results of scanning electron microscopy (SEM), Fourier transform infrared spectrometry (FT-IR), thermo-gravimetric analysis (TGA), vibrating sample magnetometer (VSM), and Brunauer–Emmett–Teller (BET) shows that Fe 3 O 4 -CS-L has been successfully prepared. The effects of contact time, pH, temperature and initial concentration were explored. The results suggested pH was a negligible factor in adsorption progress. Kinetic studies showed that the experiment data followed pseudo-second-order model. Boyd mode suggested that external mass transfer showed a rather weak rate control for MO adsorption onto Fe 3 O 4 -CS-L. Equilibrium studies showed that isotherm data were the best described by Langmuir model. The maximum adsorption capacity of MO estimated to be 338.98 mg/g at 298 K. Moreover, the adsorption capacity of Fe 3 O 4 -CS-L can keep about 74% in the fifth adsorption–regeneration cycle. Thus, the Fe 3 O 4 -CS-L could be a kind of promising material for removing MO from wastewater.
研究领域:
环境科学
·
纳米材料
·
水处理
·
吸附技术
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2019
·
IF 2.931
Xiaojuan Zhou,Chunli Xu,Yan Jin,Baoxin Li
Chiral recognition of enantiomers is fundamentally important. In this work, an effective and simple chiral sensing strategy for discrimination of leucine (Leu) enantiomers was constructed. In this chiral sensing, cube-shaped gold nanoparticles (AuNCs) as colorimetric probes are used to recognize Leu enantiomers . L-Leu can induce rapidly the aggregation of AuNCs, leading to change of AuNCs solution from red to colorless, while D-Leu cannot induce the color change. This distinct color changes allow naked-eye to distinguish chiral isomers of Leu. The chiral sensing was applied to measure the enantiometric excess of L-Leu in the whole range (from −100% to 100%). This chiral analysis can be performed by naked eye or simple ultraviolet-visible spectrometer. In addition, the mechanism of chiral recognition has been studied with circular dichroism (CD) spectra, UV–vis absorption spectra and zeta potential . In this method, the chiral recognition is due to the intrinsic chirality of AuNCs, and the AuNCs don't need any chiral labeling or modification. This chiral sensing method is simple, cheap, rapid and easy to operate. Furthermore, this work provides one experimental evidence for intrinsic chirality of nanoparticles , and helps people understand the chirality of nanostructures .
研究领域:
纳米技术
·
分析化学
·
手性传感
·
材料科学
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DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2014
·
IF 2.736
Fugui Xu,Fan Wang,Duanguang Yang,Yong Gao,Huaming Li
In this study, Au nanoparticles decorated graphene nanosheets were prepared using poly(vinylpyrrolidone) (PVP) covalently functionalized graphene oxide and chloroauric acid as template and Au precursor, respectively. Both the density and the size of Au nanoparticles deposited on the surface of graphene could be adjusted by the PVP grafting density. The graphene–Au hybrid nanosheets were then applied to fabricate a highly sensitive l -cysteine (L-CySH) electrochemical sensing platform. The cyclic voltammetry results showed that the modified glassy carbon electrode with graphene–Au hybrid nanosheets exhibited strong catalytic activity toward the electrooxidation of L-CySH. The current exhibited a widely linear response ranging from 0.1 to 24 μM with a low detection limit under the optimized conditions. The detection limit of L-CySH could reach as low as 20.5 nM (S/N = 3). The enhanced electrochemical performance of the fabricated sensor was attributed to the combination of the excellent conductivity of graphene and strong catalytic property of uniform Au nanoparticles.
研究领域:
材料科学
·
电化学
·
纳米技术
·
传感器与生物传感器
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2012
·
IF 2.237
Liangyan Wang,Xiabin Jing,Haibo Cheng,Xiuli Hu,Lixin Yang,Yubin Huang
A series of long-chain branched poly(l-lactide)s (LCB-PLAs) with controlled branch length were prepared by a simple and efficient method through a combination of ring-opening polymerization (ROP) of l-lactide and a coupling reaction between the terminal OH groups of the PLA prepolymers and the NCO groups of HDI. The influences of reaction conditions on the synthesis of the LCB-PLAs were investigated, and the structures of the resultant LCB-PLAs were characterized by 1H NMR spectroscopy and SEC-MALLS. By adjusting the degree of polymerization and the composition of the prepolymers, LCB-PLAs with different branch densities and molecular weights between branch points were obtained. The effect of macromolecular chain branching on the rheology and crystallization of PLA was also investigated. The LCB structure contributed to the enhancement of the zero-shear viscosity, complex viscosity, storage modulus, melt strength, and strain hardening under elongational flow. Thermal behavior indicated that the branch structure resulted in a short nucleation induction period and more rapid crystallization, which can be a guarantee of high-strength foams.
研究领域:
高分子科学
·
生物材料
·
聚合物化学
·
材料加工
·
生物降解材料
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DOI
高影响因子
Plants-Basel
·
2026
·Vol. 15
·期 8
·1253
·
IF 4.7
Saihua Chen,Yuhui Liu,Ning Xiao,Yan Sun,Luyao Zhang,Xiaofan Yi,Ming Xue,Aihong Li,Mingliang Xu
Heat stress, particularly during the reproductive stage, poses a major challenge to rice production, as pollen development is highly sensitive to elevated temperatures. Accurate assessment of heat tolerance during this period is crucial for improving rice heat-stress tolerance but is hindered by asynchronous panicle development and imprecise staging. In this study, we identified a pair of near-isogenic lines, ZP15 and ZP17, which exhibited contrasting seed-setting rates under heat stress. We demonstrated that this divergence arises from differential tolerance during the pollen developmental stage, corresponding to a critical window (9–16 days before heading). Taking these lines as references, we established a reliable system that synchronizes developmental staging and quantitatively assesses heat-induced fertility loss. Validated using heat-tolerant N22 and heat-sensitive Wushansimiao, this system was applied to assess four conventional varieties and eight hybrids. Huanghuazhan and self-bred hybrids (Yangxianyou 912, Yangxianyou 903, and Yangxian 9A/P119-8) displayed high tolerance comparable to control varieties, whereas Yangdao 6 and multiple hybrids showed pronounced sensitivity. Collectively, this work provides a precise and reproducible framework for evaluating heat tolerance during pollen development, offering a valuable tool for accelerating the breeding of heat-resilient rice varieties.
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高影响因子
Journal of Food Measurement and Characterization
·
2026
·
IF 3.6
Cheng Xuehuan,Ge Shuya,Liu Wanlu,Zhang Junhang,Wang Bing,Blanchard Chris,Strappe Padraig,Zhou Zhongkai,Zhao Guohua
Sea buckthorn protein (SBP) is an underutilized plant protein with limited aqueous dispersibility and interfacial functionality. In this study, SBP was modified by succinylation, and the resulting changes in structural, physicochemical, and functional properties were systematically characterized. Succinylation markedly improved the dispersibility of SBP, as evidenced by an increase in solubility from 25.25% to 68.99%, a shift in zeta potential from − 33.82 to − 51.62 mV, and reduced particle aggregation. Structural analysis indicated that succinylation induced moderate conformational rearrangement, including decreased α-helix content, increased random coil content, and changes in the tertiary microenvironment. These changes enhanced the emulsifying performance of SBP, with the emulsifying activity index increasing from 25.02 to 35.71 m²/g. β-carotene-loaded emulsions stabilized by succinylated SBP showed smaller and more uniform droplets, with droplet size decreasing from 2085.47 to 700.53 nm, together with improved encapsulation efficiency and storage stability. During in vitro digestion, free fatty acid release increased from 20.92% to 26.02%, while β-carotene bioaccessibility increased from 10.17% to 27.67%. These results suggest that succinylation improves the functional performance of SBP through a charge-conformation-interface mechanism, thereby enhancing its potential as a plant-based emulsifier for β-carotene-loaded emulsion systems. Graphical
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POLYMER ENGINEERING AND SCIENCE
·
2025
·
IF 3.2
Yanrui Cheng,Nan Yao,Yi Guo,Shifeng Ji,Yunqing Xing,Chunmei Gao
Membrane fouling remains a critical obstacle for the application of polyethersulfone (PES) ultrafiltration in industrial wastewater treatment. In this work, a novel multifunctional composite membrane was developed by co-embedding carbon quantum dots (CQDs) and ZIF-L-derived carbon-doped ZnO (C-ZnO) nanoparticles into a PES matrix via the reverse thermally induced phase separation (RTIPS) method. The optimized membrane M3 contains 0.05 wt% CQDs and 0.02 wt% C-ZnO. It exhibited a remarkably hydrophilic surface with a water contact angle of 51.8°. Compared to membranes fabricated by conventional non-solvent induced phase separation (NIPS), the RTIPS method produced a structure with a highly porous surface and an interconnected sponge-like support, effectively breaking the permeability-selectivity trade-off. The optimized composite membrane exhibited a superior pure water permeability of 1555 L m −2 h −1 while maintaining a high humic acid rejection of 91.9%. This membrane also demonstrated robust long-term antifouling stability and a photocatalytic flux recovery rate of 65.8% under visible light. Furthermore, it achieved nearly 100% antibacterial activity against E. coli and S. aureus , attributed to a dual-defense mechanism combining a physical hydration layer with the chemical action of photocatalysis and Zn 2+ release. These findings highlight the significant potential of this RTIPS-fabricated CQDs/C-ZnO/PES membrane as a robust solution for high-performance wastewater treatment.
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高影响因子
危险品化学品经营许可证（带存储）