WATER RESEARCH
·
2018
·
IF 7.051
Long Huang,Zhiqiang Chen,Dandan Xiong,Qinxue Wen,Ye Ji
As the main intermediate metabolite in anaerobic digestion of wasted activated sludge (WAS), volatile fatty acids (VFAs) are proper substrate for mixed culture (MC) polyhydroxyalkanoate (PHA) synthesis. To further optimize the performance of MC PHA production process, VFA _odd (i.e., VFA with odd carbon atoms) oriented acidification process was proposed and conducted in this study. Three regulation factors including reaction pH, fraction of added β-cyclodextrin (β-CD) and glycerol were selected and response surface methodology (RSM) was used to enhance and effectively regulate the VFA _odd production while maintaining enough acidification degree in the WAS acidification. High percentage of VFA _odd (larger than 60% and dominated by propionic acid) can be obtained in the operating condition area with glycerol addition ratio (quantified by C/N) ranging from 15 to 20 and reaction pH ranging from 8.0 to 9.5 when β-CD addition was held at zero level (0.2 g/gTSS) according to the RSM. Semi-continuous acidification and MC PHA production assays further verified the reliability and effectiveness of the VFA _odd oriented acidification strategy. Microbial function group related to propionic acid production (G prop ) was defined based on the relationships between system function and microbial community structure, and 13 frequent species were found being involved in the G prop . Roles of the group members in the oriented acidification were analyzed to understand the mechanisms of the regulation of VFA _odd production at microbial ecological level. A synergistic effect of WAS and glycerol on the VFA _odd production in the acidification process was revealed based on the ecological analysis.
研究领域:
环境工程
·
微生物学
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PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 46
·期 1
·57-69
·
IF 3.591
Shengming Xu,Jing Xu,Linying Hu,Ye Liu,Lijun Ma
In this paper, NiCo2S4 was coated on the surface of WS2 of a 1T/2H mixed phase by a two-step hydrothermal method to form an in situ core–shell structure. The unique S-scheme heterojunction of the NiCo2S4@WS2 core–shell composite photocatalyst improved the easy recombination of carriers caused by the narrow band gap of NiCo2S4 and WS2, and improved the photocatalytic hydrogen production performance. The loading ratio of NiCo2S4@WS2, the addition of Eosin Y, and the pH value of TEOA were optimized. Under the optimal conditions, the hydrogen production rate reached 5.814 mmol g−1 h−1, which is about 8.55 times and 3.35 times the hydrogen evolution rates of NiCo2S4 and WS2, respectively. The composite catalyst exhibits excellent charge separation efficiency in photoelectrochemistry, PL and BET tests, carrier transport rate and large specific surface area that can provide more active sites, which are the main factors for the improvement of the hydrogen evolution performance. This paper demonstrates new design strategies to drive efficient photocatalytic hydrogen production by building in situ core–shell structures and optimizing the carrier transport paths, which will yield new insights.
研究领域:
材料科学
·
光催化化学
·
能源转化
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 35
·16695-16705
·
IF 3.3
Yicheng Zhou,Li Dong,Tongtong Cao,Jiazheng Zhang,Rongrong Qiao,Lin Liu,Chao Liu,Xiaobo Zhang,Zhiwei Tong
A novel layered nanocomposite, C3F7-azo+/Ti4O92−, was prepared using the stripping/restacking method with K2Ti4O9 as the raw material and trans-[2-(2,2,3,3,4,4,4-heptafluorobutylamino) ethyl]-{2-[4-(4-hexyphenylazo) -phenoxy] ethyl}-dimethylammonium (hereinafter referred to as C3F7-azo+Br−) as the modifier. After modification on glassy carbon electrodes (GCE), it was used for simultaneous detection of ascorbic acid (AA) and uric acid (UA). The morphology and elemental composition of the nanocomposites were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and energy dispersive X-ray spectroscopy (EDS). The electrochemical properties were measured and analyzed by differential pulse voltammetry (DPV), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). Compared to single-component modified electrodes (K2Ti4O9/GCE, C3F7-azo+/GCE), the layered nanocomposite modified electrode (C3F7-azo+/Ti4O92−/GCE) exhibited a larger electrochemically active area (0.074 cm2), lower charge transfer resistance (94.0 Ω), and greater catalytic activity toward AA and UA. The detection limits were 0.39 μM for AA and 0.75 μM for UA, within the concentration ranges of 1.20–26.30 μM and 0.94–20.41 μM, respectively. The efficacy of C3F7-azo+/Ti4O92− was also demonstrated in real rabbit serum samples, with recoveries between 96.1% and 104.2%.
研究领域:
材料科学
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分析化学
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生物医学工程
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高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Tingjin Jiang,Yang Wang,Zichang Guo,Haopeng Luo,Chuanxiang Zhan,Yaojin Wang,Zhe Wang,Fang Jiang,Huan Chen
Piezoelectric catalysis based on the polarization of piezoelectric materials is a promising technology for environmental pollutant treatment. Developing effective piezoelectric catalysts and clarifying the reaction mechanism are crucial to the application of piezoelectric catalysis. Herein, a unique strategy of photochemical self-etching of Bi 25 FeO 40 was used to prepare a piezoelectric catalyst of Bi 25 FeO 40 /Bi 2 O 2 CO 3 . During the photochemical process, methanol was oxidized to formaldehyde, and then Bi species on the surface of Bi 25 FeO 40 reacted with formaldehyde to form Bi 2 O 2 CO 3 . As a lead-free piezoelectric catalyst, the Bi 25 FeO 40 /Bi 2 O 2 CO 3 composite possessed excellent activity for the degradation of 4-chlorophenol under ultrasonic vibration, and the degradation efficiency was more than 90% within 120 min. Introducing Bi 2 O 2 CO 3 onto the surface of Bi 25 FeO 40 can significantly promote the piezoelectric catalytic activity of Bi 25 FeO 40 via the effect of built-in electric fields. It was also found that ·OH and ·O 2 − are the main active species that are responsible for the degradation of 4-CP. The results that are presented here can extend the piezoelectric application of bismuth ferrate , and the strategy for building up the heterojunction is helpful for the preparation of other Bi-containing piezoelectric catalysts.
研究领域:
环境科学
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催化材料科学
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高影响因子
PHYSIOLOGIA PLANTARUM
·
2025
·Vol. 177
·期 5
·e70553
·
IF 3.6
Junyu Wu,Shuaiqi Yang,Muhammad Rehman,Nana Chen,Bohan Liu,Guohua Xu,Xiaorong Fan,Yinbo Gan
Nitrate serves not only as an essential nitrogen source but also as a signalling molecule to regulate plant growth and development. However, the mechanisms by which plants respond to nitrate to regulate root growth in rice remain largely unclear. In this study, we demonstrated that the overexpression of OsMADS27 significantly promoted root growth and nitrate absorption in response to nitrate supply, whereas RNA interference (RNAi) lines exhibited the opposite phenotype. OsMADS27 is predominantly expressed in the root, and the mutation of OsNAR2.1 impaired both the response rate and intensity of OsMADS27 under nitrate treatment. Notably, OsMADS27 is co-localised with OsNAR2.1, and the mutation of OsNAR2.1 affected the nuclear localisation of OsMADS27. Yeast two-hybrid (Y2H), bimolecular fluorescence complementation (BiFC) and co-immunoprecipitation (Co-IP) assays confirmed a direct protein interaction between OsMADS27 and OsNAR2.1. More importantly, chromatin immunoprecipitation followed by qPCR (ChIP-qPCR), dual-luciferase (Dual-LUC) and yeast one-hybrid (Y1H) assays demonstrated that OsMADS27 could directly regulate the expression of OsMADS57 to control root growth. Furthermore, OsMADS27 could also promote the expression of several nitrate transporter genes, including OsNRT1.2 , OsNRT2.1 , OsNRT2.3a and OsNRT2.4 , to regulate nitrate absorption in rice. Collectively, this study uncovers a novel pathway in which OsMADS27 promotes root growth in response to nitrate by directly regulating OsMADS57 expression in an OsNAR2.1-dependent manner. These findings will broaden our understanding and provide a novel regulatory network of OsMADS genes mediating root development through nitrate signalling in rice, which also has an important application value for molecular breeding to improve nitrogen use efficiency.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Hongkai Zhang,Xiaofang Bian,Shunjing Luo,Chengmei Liu,Xiuting Hu
The effect of sodium alginate (SA) on the yogurt stability and the related mechanisms were investigated. It was found that low-concentration SA (≤0.2 %) increased the yogurt stability, while high-concentration SA (≥0.3 %) decreased the yogurt stability. Sodium alginate increased the viscosity and viscoelasticity of yogurt and this effect was positively correlated with its concentration, suggesting that SA worked as the thickening agent in yogurt. However, addition of ≥0.3 % SA damaged the yogurt gel. These results suggested that interaction between milk protein and SA might play an important role in the yogurt stability besides the thickening effect. Addition of ≤0.2 % SA did not change the particle size of casein micelles. However, addition of ≥0.3 % SA induced aggregation of casein micelles and increased the size. And the aggregated casein micelles precipitated after 3 h storage. Isothermal titration calorimetry analysis showed that casein micelles and SA were thermodynamically incompatible. These results suggested that the interaction between casein micelles and SA induced aggregation and precipitation of casein micelles, which was critical in the destabilization of yogurt. In conclusion, the effect of SA on the yogurt stability was dependent on the thickening effect and the interaction between casein micelles and SA.
研究领域:
食品科学
·
化学
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PubMed
高影响因子
Smart Materials and Structures
·
2023
·Vol. 33
·期 1
·015029
·
IF 4.1
Junyao Wang,Yansong Chen,Jing Wang,Huan Liu,Tianhong Lang,Qi Hou,Rui Wang,Bowen Cui,Jingran Quan,Hongxu Pan,Hanbo Yang,Jianxin Xu,Yahao Liu,Baoliang Wang
As a part of biomimetic gelatinous polymer actuator (BGPA), hydrogel artificial muscle has the advantages of extreme flexibility, low driving voltage and controllable driving direction. However, such artificial muscles do not have self-healing properties and it is difficult to continue using them if they break, which considerably reduces their lifespan. In this paper, we propose a hydrogel artificial muscle with self-healing capability by gluing a membrane of electrodes with a pleated structure to a self-healing actuator layer. The crosslinking reaction between polyacrylic acid molecular chains and carboxylated chitosan (CLC) molecular chains was utilized to fabricat e self-healing actuator layers, while multi-walled carbon nanotubes and chitosan were employed for electrode films. The impact of CLC doping content on the self-healing properties, mechanical properties, electrical response output force properties, and electrochemical properties of self-healing artificial muscles was investigated. Experimental results demonstrated that the output force density of the self-healing artificial muscle could reach 14.7 mN g−1 with an addition of 0.2 g CLC; even after fracture-self-healing, the maximum output force density of the artificial muscle still remained above 90%, and the maximum stretching stress of the actuator film maintained a range from 91% to 99%, showcasing exceptional self-healing performance.
研究领域:
材料科学
·
生物医学工程
·
机器人技术
·
聚合物科学
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高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Tiantian Yang,Chengzhen Jiang,Linnan Zhang,Yi Du,Jiangtao Fan,Linlin Zhang,Fuxin Liang
Oil spills are one of the most dangerous sources that cause serious environmental pollution and fire and explosion. In this work, multifunctional separator silica@polydivinylbenzene/poly 2,6-dimethyl-1, 4-phenyl ether (silica@PDVB/PPE) Janus particles were fabricated via seed emulsion polymerization, causing phase segregation as well as selective modification. The epoxy modified silica is partially covalently bonded to the fabric substrate surface by simple spraying to achieve a strong composite coating. The low surface energy PDVB/PPE forms a micronano rough layered surface, which can achieve a super hydrophobic and lipophile surface (WCA = 155°) and obtain a high flux separation of water and oil at 32,700 L·m–2·h–1. At the same time, the Janus composite fabric coating has the advantages of high heat resistance and flame retardant, which is realized by halogen-free flame-retardant unsaturated polyphosphate (PPE), making Janus fabric have potential value in separating oil–water mixtures and fire protection applications. In addition, the coating shows excellent chemical durability. After soaking in various aqueous solvents and organic solvents for 30 h, it can still maintain superhydrophobicity and flame retardant. The coating still has water repellency and flame retardant after 50 washings and mechanical wear and has good mechanical durability.
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高影响因子
Journal of the Iranian Chemical Society
·
2025
·
IF 2.3
Yin Dawei,Chen Jiabao,Liu Yuting,Dang Chi,Zhou Yi,Zhang Zixu,Zheng Ruilin
Glutamic acid (Glu), aspartic acid (Asp), arginine (Arg) and ascorbic acid (AA) play an important role in the body’s protein anabolism, promoting tissue healing, improving disease resistance, as well as promoting bone growth, improving malnutrition, antioxidant and so on. Therefore, rapid detection of Glu, Asp, Arg and AA is of great significance. 2-methoxy-4-(((5-phenyl-1,3,4-thiadiazol-2-yl)imino)methyl)phenol (Probe A) was synthesized with deep eutectic solvent as catalyst under mild conditions. The Probe A was applied to the detection of Glu, Asp, Arg and AA, and the results showed that Probe A could well identify Glu, Asp, Arg and AA. Glu, Arg and AA are well recognized at pH = 6–12. Asp is well recognized at pH = 7–12. The binding ratios between Probe A and Glu, Asp, Arg, AA were 2:3, 2:3, 1:2 and 2:3, respectively. The association constants were 9.59 × 10 3 M −1 , 7.34 × 10 3 M −1 , 4.46 × 10 4 M −1 , 1.69 × 10 4 M −1 , respectively. The detection limits were 3.33 × 10 –5 M, 1.62 × 10 –5 M, 2.22 × 10 –4 M, and 1.69 × 10 –5 M, respectively. The probe solution quickly became colorless after adding Glu, Asp and AA, and orange-red after adding Arg. The identification mechanism of Probe A with Glu, Asp, Arg and AA was obtained by infrared titration and nuclear magnetic titration. This method provides an important way for rapid detection of Glu, Asp, Arg and AA.
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高影响因子
CHEMOSPHERE
·
2019
·
IF 5.108
Xingjia Yin,Jing Lu,Yuchun Wang,Guanglong Liu,Yumei Hua,Xiaoqiong Wan,Jianwei Zhao,Duanwei Zhu
Excessive nitrogen has been a global concern to cause lake eutrophication . The denitrification and anammox processes are considered to be effective biological pathways for nitrogen removal. Submerged macrophytes also play a key role in the nitrogen cycle of lakes. However, the mechanism of submerged macrophytes on regulating biological nitrogen removal pathways has not been well quantified. Therefore, this study investigated the impacts of submerged macrophytes on the community structures and abundance of the nirS -type denitrifiers and anammox bacteria in the rhizospheres. The qPCR results indicated that the abundance of two bacteria in the near-rhizospheres of submerged macrophytes was significantly lower than the root compartments and non-rhizospheres, while the concentrations of organic acids in the near-rhizospheres were higher than those of the root compartments and non-rhizospheres. Redundancy analysis results illustrated that concentrations of NO 3 − -N, NO 2 − -N, citric acid and oxalic acid were the key environmental indicators which had the significant impact on the microbial community . The concentrations of citric acid and oxalic acid were negatively correlated with the nirS -type denitrifiers abundance, and the oxalic acid concentrations were negatively correlated with the anammox bacteria abundance. These results indicated that submerged macrophytes could reduce the abundance of nirS -type denitrifiers and anammox bacteria by releasing organic acids. In addition, the highest diversity of denitrifier community were found in the rhizosphere of the Hydrilla verticillata , while the highest diversity of anammox community were found in the Potamogeton maackianus rhizosphere. These results indicate that the impacts of submerged macrophytes on the biological nitrogen removal pathways were species-dependent.
研究领域:
环境微生物学
·
水生生态学
·
生物地球化学
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PubMed
高影响因子
FOOD CHEMISTRY
·
2026
·
IF 10.4
Qiu-Yu Peng,Meng Wang,Song Chen,Long-Hua Zou,Yun-Cheng Li,Fan-Bing Meng
PAC@PHZ-II exhibits a distinct color change for different pH values and ammonia. • Bilayer film's low water vapor transmission rate aids food preservation. • PAC@PHZ-II strongly inhibited S. aureus , E. coli , and L. monocytogenes . • PAC@PHZ-II effectively indicate fresh pork and spoiled pork. A PAC@PHZ-II bilayer film composed of polyvinyl alcohol/carboxymethyl konjac glucomannan/alizarin as the sensor layer and poly(3-hydroxybutyrate- co -3-hydroxyvaleric acid)/nano-ZnO as the antibacterial layer was developed using electrospinning technology for meat preservation and freshness perception. Structure analyses revealed that there are interactions between the sensor layer and antibacterial layer. The bilayer film has a lowest water vapor transmission rate of 26.03 ± 0.21 g·m −2 ·h −1 , and the tensile strength and elongation at break are approximately 150% and 290% higher than those of single-layer films, respectively. The bilayer film is sensitive to pH and ammonia, exhibiting visible color changes from yellow to purple. Antibacterial test indicated the dual functional film had strong antibacterial activity against Staphylococcus aureus , Escherichia coli and Listeria monocytogenes . Pork packaged with the film exhibits a 3 days shelf-life extension, and the color changed when meat freshness decreases, suggesting a potential use in preserving and monitoring pork freshness. Download: Download high-res image (236KB) Download: Download full-size image
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高影响因子
ADVANCED POWDER TECHNOLOGY
·
2026
·Vol. 37
·期 7
·105314
·
IF 4.5
Lin Li,Kaiyun Yang,Zhan Ding,Chang Liu
Spodumene is often associated with albite, and their similar physicochemical properties render conventional collectors ineffective for achieving selective flotation separation. This study introduces a Fe 2+ /PMS Fenton-like system to selectively enhance the adsorption of NaOL onto the spodumene surface, thereby enlarging the floatability difference between the two minerals and enabling their separation. Single-mineral flotation tests demonstrated that under optimal conditions (pH 9, NaOL dosage 8 × 10 -4 mol/L, and Fe 2+ /PMS dosage 2 × 10 -4 mol/L with a Fe 2+ :PMS molar ratio of 1:3), the recoveries of spodumene and albite were 92.37% and 8.64%, respectively. Flotation experiments on an artificial mixed mineral (spodumene:albite = 1:3) yielded a spodumene concentrate with a Li 2 O grade of 6.73% and a recovery of 88.17%. The separation mechanism was elucidated through contact angle measurements, atomic force microscopy (AFM), zeta potential analysis, electron paramagnetic resonance (EPR), and X-ray photoelectron spectroscopy (XPS). The results indicate that the Fe 2+ /PMS system selectively generates reactive oxygen species (SO 4 • − and •OH) on the spodumene surface. These species oxidize Fe 2+ to Fe 3+ , leading to the adsorption of more Fe 3+ species on spodumene which subsequently act as active sites for oleate anion adsorption. In contrast, the system exhibited a comparatively minor effect on the albite surface. This work provides a novel reagent approach and a theoretical foundation for the flotation separation of spodumene from albite.
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高影响因子
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