INTERNATIONAL DAIRY JOURNAL
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2026
·
IF 3.1
Mengyuan Cao,Min Li,Yizhuo Yan,Yifan Wu,Li Su,Jinghan Dai,Cong Wang,Xin Lv,Yan Zhang,Wupeng Ge,Baowei Yang
Goat milk is nutritionally valuable and ranks as the second most consumed dairy in China, with Shaanxi Province being the national leader. However, systematic studies on regional quality variations, grading and spoilage mechanisms of it remain limited. In this study, 124 raw milk samples were collected from 14 major dairy goat breeding areas across Shaanxi. Our results revealed that significant spatiotemporal variations, and long-distance transportation affected milk quality by increasing microbial loads and reducing fat content ( P < 0.05). The grading model demonstrated high accuracy (91.8%) and reliability (AUC = 98.4%), with fat content being the most critical biomarker. Storage at 10 °C accelerated spoilage compared to 4 °C, with marked enrichment of Pseudomonas and Enterobacteriaceae . Multi-omics analysis identified seven genus-level microbial biomarkers and five key metabolites, which are linked to goat milk spoilage. This study provides a data-driven tool for raw goat milk quality assessment and grading, reveals core microbiological and metabolic mechanisms, and offers crucial insights for quality control in the dairy industry.
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POLYMER
·
2025
·
IF 4.5
Guangshui Tu,Chong Wang,Shengyou Chen,Qian Wang,Zhenxue Liu,Haotian Zhou,Chunyu Feng,Handou Zheng,Haiyang Gao
Heterogeneous catalysts have long dominated polyolefin production, the immobilization of a pyridylamido hafnium catalyst is highly challenging because of its unique in-situ ligand modification mechanism. Here, we report a heterogeneous pyridylamido hafnium catalyst immobilized on a dual MgCl 2 /Al i Bu n (2-ethyl-1-hexoxide) 3-n activator/support for slurry homo- and copolymerization of 4-methyl-1-pentene (4MP). The supported pyridylamido hafnium catalyst shows enhanced catalytic activity and excellent polymer morphology control toward homopolymerization of 4-methyl-1-pentene. The produced poly(4-methyl-1-pentene)s show high isotacticity (>99%) and high melting temperatures up to 230 °C, and have normal molecular weight distribution. The heterogeneous catalyst still remains the advantages of enhanced catalytic activity and excellent polymer morphology control during the copolymerization of 4MP and α-olefins. Both the incorporation of α-olefin and longer chain α-olefins can improve the resilience of PMP materials.
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ANALYTICAL CHEMISTRY
·
2026
·
IF 6.7
Chenxi Wang,Linzi Huang,Yixi Xie,Pengcheng Zhao,Junjie Fei
2-Chloro-4-nitrophenol (2C4NP) is a traditional organic pollutant whose toxicity constitutes a significant threat to both human health and environmental safety. Therefore, developing a method for the accurate detection of 2C4NP in natural environments is imperative. Consequently, we develop a photoelectrochemical sensing platform based on MWCNTs@In2S3/In2O3/GCE in this work. During the construction process, it is discovered that the introduction of MWCNTs accelerated the electron transport rate, which improved the separation efficiency of photogenerated electron–hole pairs in In2S3. Meanwhile, the MWCNTs@In2S3/In2O3 composite materials formed by MWCNTs@In2S3 and In2O3 not only exhibit an S-scheme heterojunction but also preserve the intrinsic advantages of MOFs-derived materials. This synergistic structure endows the composite materials with excellent optoelectronic performance and adsorption capability. Thus, the constructed photoelectrochemical sensing platform demonstrates promising potential for detecting 2C4NP, with a linear detection range from 3 nM to 5 μM. However, compared to some existing platforms, its detection range remains relatively narrow, which may represent an area for future improvement.
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PubMed
高影响因子
MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 5
·321
·
IF 5.4
Liu Shicong,Zhang Yuanyuan,Zhao Hongyang,Liu Junqiu,Hou Chunxi
A “turn-on” fluorescence sensor was developed for cholesterol detection on the basis of fluorescence resonance energy transfer (FRET) between the organic fluorophore 1-(4-(1,2,2-triphenylvinyl)phenyl)pyrene (TPE-Py) and a gold nanoparticle-β-cyclodextrin conjugate (AuNPs-β-CD). Mechanistically, the AuNPs-β-CD, an energy acceptor, was synthesized via Au–S bonding, and TPE-Py transferred energy to the AuNPs via FRET, resulting in fluorescence quenching of TPE-Py. In the presence of cholesterol, which has a stronger binding affinity for the β-CD cavity, TPE-Py was competitively displaced, enabling the recovery of the fluorescence signal. This sensor has high sensitivity for cholesterol, with a low detection limit of 66 nM and a linear range of 0.5–30 µM. Furthermore, the sensor was successfully used to determine the cholesterol content in food samples with satisfactory recoveries, revealing its potential for food analysis.
Section
Graphical abstract
The alternative text for this image may have been generated using AI.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
·
IF 9.2
Yanping Dong,Xiqiang Tian,Jinhui An,Pengyu Xu,Xinrui Wei,Muhammad Zahid
Achieving high activity, superior selectivity, and durable performance remains challenging for pristine MOFs in heterogeneous hydrogenation catalysis. Herein, nitrogen-doped carbon-wrapped Cu@Cu 2 O/NC heterogeneous catalysts enriched with Cu 0 –Cu + interfacial sites were readily derived by calcining Cu-MOF under an air atmosphere. Comprehensive characterization was conducted to examine synthesis-induced variations in bulk crystallinity, surface chemistry, and catalytic activity for Cu-MOF-250, Cu-MOF-350, and Cu-MOF-450. Compared to its counterparts, the Cu-MOF-350 catalyst exhibited optimal performance in the preferential hydrogenation of noxious 4-nitrophenol (4-NP) to valued 4-aminophenol (4-AP), maintaining high activity for up to ten consecutive rounds. The enhanced catalytic hydrogenation efficiency of the Cu-MOF-350 catalyst is ascribed to its distinctive nanostructural features, which originate from the synergistic interplay between Cu and Cu 2 O species. In addition, the improved uniform distribution of Cu@Cu 2 O nanoparticles generates higher concentration of interfacial exposed reactive Cu 0 /Cu + sites on the Cu-MOF-350 surface, which are considered crucial for the promoted hydrogenation of 4-NP.
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MOLECULES
·
2024
·Vol. 29
·期 4
·850
·
IF 4.2
Meng Guo,Dou Wu,Hongyu Yang,Xiao Zhang,Dong-Xu Xue,Weiqiang Zhang
The use of gaseous CO in Pd-catalyzed carbonylative quinolone synthesis presents challenges related to safety and precise pressure control. In response, a streamlined non-gaseous synthesis of 4-quinolone compounds has been developed. This study introduces a tunable CO-releasing system utilizing Fe(CO)5activated by a dual-base system of piperazine and triethylamine. This alternative liquid CO resource facilitates the palladium-catalyzed carbonylative C-C coupling and subsequent intramolecular cyclization. By tuning the tandem kinetics of carbonylation and cyclization, this non-gaseous method achieves the successful synthesis of 22 distinct 4-quinolones with excellent yields. This is achieved through the three-component condensation of sub-stoichiometric amounts of Fe(CO)5with 2-iodoaniline and terminal alkynes. Operando mechanistic studies have revealed a novel CO transfer mechanism that facilitates homogeneous carbonylative cyclization, distinguishing this method from traditional techniques. In addition to addressing safety concerns, this approach also provides precise control over selectivity, with significant implications for pharmaceutical research and the efficient synthesis of pharmaceutical and bioactive compounds.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 6
·460
·
IF 3.2
Li Caixia,Ji Nan,Li Chenglong,Li Tianqi,Lu Peng,Ren Shuang,Ma Xiaoxuan
BiFeO 3 -BaTiO 3 (BF-BT) ceramics have emerged as a prominent research focus in the lead-free materials field in recent years due to their high Curie temperature and excellent ferroelectric and piezoelectric properties. In this work, 0.68BiFeO 3 -0.32BaTi 1- x (Fe 0.5 Nb 0.5 ) x O 3 + 0.1 wt.% MnO 2 ceramics (abbreviated as 0.68BF-0.32BT(FN) x -Mn, x = 0, 0.01, 0.02, 0.03, 0.04) were prepared by the conventional solid-state reaction method. The effects of Ti-site (Fe 0.5 Nb 0.5 ) 4+ substitution on the crystal structure, microstructure, dielectric, ferroelectric, and piezoelectric properties of 0.68BF-0.32BT ceramics were systematically investigated. It is confirmed from the XRD results that all the compositions consist of diphasic tetragonal (T) and rhombohedral (R) phases. Increase of B-site (Fe 0.5 Nb 0.5 ) 4+ substitution induces an expansion of unit cell volume, reduces the ferroelectric–paraelectric phase transition temperature ( T m ) monotonically from 471 °C at x = 0 to 445 °C at x = 0.04. The average grain size and piezoelectric properties increase by the substitution 2.0 mol% (Fe 0.5 Nb 0.5 ) 4+ complex cations for Ti 4+ in 0.68BF-0.32BT ceramics. Notably, the piezoelectric properties of this ceramic are improved through the grain size effect. Specifically, the 0.68BF-0.32BT(FN) 0.02 -Mn ceramics display optimal comprehensive electrical performance with T m = 461 °C, P max = 26.4 µC/cm 2 , P r = 18.1 µC/cm 2 , E C = 23.0 kV/cm, d 33 = 151 pC/N, k p = 0.298, Q m = 50.32, demonstrating the potential viability of BF-BT ceramics for high-temperature lead-free piezoelectric applications.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
G.Q. Wang,Y.P. Lin,R. Ye,Y.N. Feng,L.Y. Li
In this work, Pr 3+ and Tb 3+ coactivated Na 5 Gd(WO 4 ) 4 (NGW) phosphors have been synthesized by high-temperature solid-state reactions and the scheelite crystal structure was determined for the first time. A color-tunable emission in NGW: Pr 3+ , Tb 3+ phosphors can be realized by the modulation of excitation wavelengths, namely, the fluorescence intensity ratio of Pr 3+ to Tb 3+ in this material could be changed by different excitation. With increasing temperature, the luminescence of NGW: Pr 3+ , Tb 3+ phosphor decreases almost linearly with the CIE coordinate variation from (0.306, 0.392) to ((0.375, 0.465) and result in the color of the photoluminescence variation from the blue-green to yellow. These results demonstrated that the investigated phosphors are attractive for application in display lighting and optical temperature sensing.
研究领域:
材料科学
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发光材料
·
光学性质
·
固态化学
·
温度传感
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高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Jiayong Zhang,Bin Yao,Zhanhui Ding,Yongfeng Li
The performance stability of Cu2ZnSn(S,Se)4 (CZTSSe) solar cells is one of the key issues for its commercialization. Currently, Cu+ and Cu2+ salts have been successfully used to prepare CZTSSe solar cells, but comparative studies on the performance stability of the two types of solar cells are scarce. In this work, the performance degradation processes of CZTSSe solar cells, stored for 249 days under dry conditions, prepared respectively with Cu2+ and Cu+ salts (denoted Cu2+-cell and Cu+-cell, respectively) are investigated. It is found that the Cu+-cell has a higher initial PCE but worse performance stability than the Cu2+-cell. By calculation of the contribution percentage of VOC, JSC, and FF to the PCE and JL, Rs, Rsh, and (A, J0) to VOC, JSC, and FF for the two types of solar cells with the best initial PCE, it is concluded that the contribution percentages of JL, Rs, Rsh, and (A, J0) to a decreased PCE for the Cu2+-cell are nearly equal, while the decreased PCE for the Cu+-cell dominantly comes from a greatly decreased Rsh and sharply increased J0. The great decrease in Rsh is due to the formation of SnSe2, which may result from its chemical reaction pathway to fabricate the CZTSSe absorber. The sharp increase in J0 may be attributed to the formation of SnZn antisite defects. This work indicates that it is important to consider the Cu oxidation state of the salts to improve the stability of solution-processed CZTSSe solar cells.
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MARINE POLLUTION BULLETIN
·
2023
·
IF 5.8
Kunpeng Wang,Liju Tan,Yuewei Zhang,Dongmei Zhang,Na Wang,Jiangtao Wang
P-nitrophenol (4-NP) is the most persistent and highly toxic species among nitrophenol. In this work, a novel fluorescent probe for the detection of 4-NP in aqueous environment was constructed by combining the carbon dots (CQDs) with excellent optical properties and the molecularly imprinted polymer (MIP) with favorable selectivity . The CQDs were synthesized by hydrothermal method using citric acid hydrate as carbon source and o -phenylenediamine as surface modifier, then the molecularly imprinted polymers coating on the CQDs (MIP@CQDs) were obtained by sol-gel imprinting process. The fluorescence quenching of MIP@CQDs is the results of internal filtration effect and dynamic quenching when they encounter with 4-NP. The probe is suitable for the quantitative detection of trace 4-NP in actual aqueous samples, such as tap water , wastewater and seawater, with satisfying recoveries from 95.1 % to 107.8 %, wide detection linear ranges between 0 and 144 μmol/L, low detection limit of 0.41 μmol/L and high selectivity. The detection results are consistent with those of the HPLC method. This work provides a simple, rapid and effective fluorescent detection method for trace 4-NP in aqueous environment.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
·
IF 3.8
Xinlin Wang,Rudong Zhu,Xiangkui Wang,Fengjiao Liu,Yan Gao,Rongfeng Guan,Yalei Chen
In this paper, the application of metal organic frameworks (MOFs) doped with carbon dots in fluorescence detection was studied.CDs@Eu-MOF/PVDF thin films were prepared by simple solvothermal method, carbon dots modification and in-situ growth process.The structure and morphology of the film was characterized by XRD, SEM, FT-IR and XPS.The results show that CDs@Eu-MOFs membrane has strong red fluorescence, good stability in methanol solvent, and high selectivity and sensitivity to nitrobenzene and 4-nitrophenol.The CDs@Eu-MOFs/PVDF film material can be used to detect nitrobenzene and 4-nitrophenol in methanol solvent and gaseous state. The detection limits of nitrobenzene and 4-nitrophenol in liquid are 0.2807 mg/L and 0.0168 mg/L, and the detection limits of nitrobenzene and 4-nitrophenol in gaseous state are 0.346 mg/L and 0.0136 mg/L.
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高影响因子
NANO
·
2022
·
IF 1.438
Zhikun Zhang,Qian Dong,Yapeng Cao,Yumin Liu,Ying Zhao
In order to conveniently and rapidly detect Cr 3+ ions in aqueous solution, novel functionalized gold nanoparticles (AuNPs) were designed with 4-mercaptobenzoic acid (4-MBA) and polyethyleneimine (PEI). In addition, we also compared the response signal of various functional AuNPs to Cr 3+ ions on the detection system. The modifiers included 4-MBA, 4-nitrobenzene mercaptan (4-NTP) and PEI, respectively. The results showed that 4-MBA and PEI co-functionalized had better sensitiveness than others. Cr 3+ ions in aqueous solution could be detected by naked eye and UV-Vis absorption spectrum and the limit of detection was 1 μ M. The response was found to be proportional to Cr 3+ ions concentration in the range from 2 μ M to 10 μ M. The developed platform with high selectiveness was successfully utilized to detect Cr 3+ ions in simulated samples.
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