FOOD RESEARCH INTERNATIONAL
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2025
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IF 8
Pei Yu,Zhuoqi Zheng,Meng Wang,Zude Luo,Fei Lao,Kang Ren,Wenjiang Dong,Jihong Wu
Onion seasoning oil produced by oil immersion is valued for its distinctive aroma and nutritional benefits, yet its key aroma compounds remain insufficiently characterized. Based on a strategy of combined molecular sensory science and gas chromatography‑sulfur chemiluminescence detection (GC-SCD) analysis, a total of 50 volatile aroma compounds were identified. Flavor dilution (FD) analysis highlighted 12 potent odorants, including dipropyl disulfide (FD up to 1024). Notably, 3-mercapto-2-methylpentan-1-ol, a potent odorant with a low mass spectrometry response, was identified and quantified via GC-SCD. Despite its trace concentration, it was the most significant contributor, exhibiting the highest odor activity value (OAV) of 677–989. Aroma omission tests confirmed the indispensable roles of both 3-mercapto-2-methylpentan-1-ol and dipropyl disulfide. The multi-instrument joint validation strategy provides an effective method for locating key aroma compounds in vegetable oil. These findings also provide a scientific foundation for optimizing production to enhance the quality of onion seasoning oil.
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JOURNAL OF CHROMATOGRAPHY A
·
2025
·
IF 4
Liang Xu,Jinjian Yao,Zhen Wang,Songzi Xie,Jinmei Ou,Bin Wang
Conventional methods for analyzing monosaccharides, such as 1-Phenyl-3-methyl-5-pyrazolone (PMP) derivatization coupled with high-performance liquid chromatography (HPLC), struggle to detect ketoses and acidic sugars. This limitation hinders the precise structural analysis of polysaccharides in traditional Chinese medicine (TCM). A methylation-assisted Gas Chromatography-Mass Spectrometry (GC–MS) approach was developed to address this issue in the current study. By optimizing the methylation process and using GC–MS with a BR-17 column and an Electron Ionization (EI) source, simultaneous detection of ten different monosaccharides was achieved within 20 min. GC–MS profiling of monosaccharides generally gives two peaks per analyte, except in the cases of fructose and galacturonic acid. Notably, fructose (Fru) was identified for the first time in the polysaccharides of Polygonatum species: P. sibiricum at 18.55 μg/mg, P. cyrtonema at 16.90 μg/mg, and P. kingianum at 14.35 μg/mg, overcoming the limitations of the inability to detect ketoses in the PMP-HPLC method. Data analysis revealed distinct species-specific markers: P. kingianum polysaccharides (PKP) uniquely contained α -galacturonic acid (α-Gal: 19.95 μg/mg), whereas P. sibiricum polysaccharides (PSP) featured six monosaccharides, including glucose (Glc: 135.45 μg/mg), mannose (Man: 78.95 μg/mg), and ribose (Rib: 26.90 μg/mg), with a total of 299.50 μg/mg. P. cyrtonema polysaccharides (PCP) showed elevated levels of glucuronic acid (GlcA, 38.40 μg/mg). This derivatization-enhanced GC–MS method effectively fingerprints TCM polysaccharides, enabling clear differentiation of Polygonatum species through analysis of monosaccharide composition and total sugar content. This approach establishes clear structural distinctions, overcoming the limitations of conventional chromatographic techniques and enhancing the quality control and authentication of TCM polysaccharides.
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ULTRASONICS SONOCHEMISTRY
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2025
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IF 9.7
Xinyu Zeng,Xiaoxuan Wang,Yading Zhao,Lu Guo,Xiao Sun,Mengmeng Shang,Shuting Huang,Rui Liu,Jialu Zhang,Shan Xiao,Dandan Shi,Ning Cong,Jie Li
Triple-negative breast cancer has previously been considered to a weak tumor immunogenicity. A strategy combining sono-immunotherapy and metal ion interference therapy holds promise for the tumor immune environment. 2,2-azobis[2-(2-imidazolin-2-yl)propane] dihydrochloride (AIPH), functioning as a sonosensitizer, can produce alkyl radicals that can trigger sono-oxidative stress in neoplastic cells. Metal ion interference therapy has also demonstrated promise as an immunotherapy. However, the AIPH’s chemical instability and the metal ions are limited by the short half-life of blood components and the lack of specificity. Herein, we developed a multifunctional nanoparticle HA/AIPH@ZIF-8 (HAZ), which incorporates hyaluronic acid (HA) specifically targeting CD44 receptors. This design aims to facilitate the targeted accumulation of nanoparticles within tumor microenvironments. HAZ amplifies sono-oxidative stress and the release of mitochondrial DNA and nuclear DNA damage. Both dsDNA and zeolitic imidazolate framework (ZIF-8) derived zinc ions (Zn 2+ ) to facilitate the STING pathway and immunogenic cell death (ICD) mediated maturation of dendritic cells, infiltration of cytotoxic T lymphocytes(CTLs), the nitrogen produced by the dehydration of AIPH can increase the acoustic cavitation effect, promoting HAZ penetration at the tumor. The real-time ultrasound imaging capabilities of HAZ are also attributed to the generation of nitrogen. In general, HAZ-mediated sonodynamic therapy (SDT) might offer contrast-enhanced imaging and an efficient anticancer sono-metalloimmunotherapy.
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ANALYTICAL CHEMISTRY
·
2025
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IF 6.7
Xi-Qian Sun,Yun-Feng Li,Li Chen,Hong-Bao Li,Ren-Hui Gao,Jie Liu,Tian-Yu Yang,Zheng Guo
Lithium-ion batteries (LIBs) provide many benefits, but trace electrolyte leakage can cause serious safety risks such as thermal runaway. Although gas sensors offer a potential solution, the complexity of electrolyte solvents in LIBs makes it challenging to develop sensing materials capable of universally detecting multiple solvent molecules. Here, Ag@Ag2O-functionalized SnO2 nanoflowers were synthesized using a self-template pyrolysis strategy for the sensitive detection of both common solvent molecules and widely used electrolytes. These sensors, enhanced by abundant oxygen vacancies introduced by Ag@Ag2O functionalization, exhibit excellent sensitivity, particularly to dimethyl carbonate, with a response of 106–100 ppm, a low detection limit of 11.76 ppb, and rapid response/recovery times (28/55 s) at an operating temperature of 200 °C. The sensor performance was validated by density functional theory calculations, which corroborated the effectiveness of the sensing material. In simulated LIB leakage scenarios, such as puncture and electrolyte injection, the sensors demonstrated quick responses to various common electrolyte compositions, indicating their potential for practical applications. This study highlights an effective method for fabricating composite sensing materials and emphasizes the practical significance of our universal detection approach for practical monitoring of electrolyte leakage in energy storage devices.
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Xiaoling Xue,Chongyi Wang,Xun Zhu,Dingding Ye,Yang Yang,Hong Wang,Rong Chen,Qiang Liao
The use of a gas diffusion photoanode for a photocatalytic fuel cell is promising to simultaneously degrade VOCs and generate electricity. However, conventional gas-diffusion photoanode faces the issues of inefficient solar energy utilization and serious electron-hole recombination. Herein, a visible-light-responsive gas-diffusion g-C 3 N 4 /TiO 2 heterojunction photoanode is developed for simultaneous degradation of toluene and generation of electricity. In addition to the intrinsic feature of reduced mass transfer resistance of VOCs to the photocatalytic surface, such a gas-diffusion photoanode not only extends the photo-response spectrum, but also enhances charge separation. Accordingly, the photocatalytic fuel cell with the newly-developed photoanode demonstrates superior discharging performance and toluene removal efficiency over the gas-diffusion TiO 2 and g-C 3 N 4 photoanodes. The maximum power density achieved by the gas-diffusion g-C 3 N 4 /TiO 2 heterojunction photoanode is 0.0375 mW/cm², while the maximum toluene removal efficiency reaches 43.8 %. This study has promoted the development of photocatalytic fuel cells for the degradation of VOCs and electricity generation.
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QUIMICA NOVA
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2025
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IF 0.7
Yan Li,Yu Baolu,Pan Yuewen,Li Xuezhi,Lou Zeyang,Tian Hongliang
Polymer-based fracturing fluids are widely used in unconventional reservoirs but often fall short in complex conditions. This study synthesizes a novel hydrophobic association water-soluble polymer (PAMNC12) and explores its synergy with viscoelastic surfactants (VESs: oleic acid amide propyl trimethylammonium chloride (OTAC), oleic acid amide propyl sulfobetaine (ODSB), oleic acid amide propyl carboxyl betaine (ODCB)) to optimize fracturing fluid performance. PAMNC12 exhibits critical association concentrations at 1029.2 and 2513.2 mg L-1. Rheological, gel-breaking, and core damage tests reveal that VES-PAMNC12 synergy significantly enhances apparent viscosity, viscoelasticity, drag reduction, heat/shear resistance, and proppant-carrying capacity while reducing residue content and core damage. Optimal dosages are 400 mg L-1 VES and 10,000 mg L-1 KCl. Among the systems, PAMNC12/OTAC shows superior thickening, heat/shear resistance (160 °C), drag reduction (lowest settlement velocity), and minimal residue (30 mg L-1) and core damage (10.1%). PAMNC12/ODSB and PAMNC12/ODCB also demonstrate excellent heat tolerance, sand-carrying, drag reduction, and low formation damage, making them promising for hydraulic fracturing in unconventional reservoirs. This study provides a foundation for developing high-performance fracturing fluids.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
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IF 3.9
Huang Liu,Yangfei Liu,Minghao Liu,Hailong Liu
Water/diesel-cyclopentylamine and water/diesel-cyclopentanone emulsions were used to store natural gas during hydrate formation. First, cyclopentylamine (-amine) and cyclopentanone (-anone) were tested as thermodynamic promoters for CH4 hydrate formation in water/diesel (w/o) emulsions. The kinetics of CH4 hydrate formation in the w/o-amine and w/o-anone emulsions were then investigated. It was found that the promotional effect of both cyclopentylamine and cyclopentanone on CH4 storage in the hydrate phase was much better than that of cyclopentane, with the highest gas storage amount reaching 201.7 m3/m3, which is close to the ideal value (220 m3/m3), and the water-to-hydrate conversion ratio was higher than 90%. The main hydration reaction process was completed in 50 min, with the reaction rate reaching 2.3 mmol/min, which is higher than that reported for aqueous solutions. It should be noted that this was the first time that cyclopentylamine was tested and it showed good thermodynamic and kinetic stimulation effects on gas hydrate formation. The suitable CH4 hydrate formation conditions including the additional amount of promoters, temperature, pressure, and water cut range were determined to be approximately 20 wt %, 274.15–278.15 K, 5.0–6.0 MPa, and 20 wt %, respectively. The storage and transport pressure for the formed hydrate products could be decreased to less than 1 MPa. The significant gas storage amount was further supported by laser Raman analysis, which confirmed that the CH4 molecules were trapped in the small and large cages of the formed SII hydrate. Meanwhile, the formed hydrate/diesel slurries exhibited good dispersion features.
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Materials Research Express
·
2025
·
IF 2.2
Suyang Lu,Jie Su,Haoran Zhan,Jintai Li,Jiaqing Li,Xulin Yang,Zhoukun He,Xiaorong Lan,Wei Feng
Polystyrene (PS), known for its low cost, excellent chemical stability, and optical transparency, has been widely used in various applications including electronic equipment packaging, pharmaceuticals, and food packaging. Although PS demonstrates some hydrogen permeability, its inherent oxygen and water vapor barrier properties require substantial improvement to meet advanced industrial standards. Reduced graphene oxide (rGO) has been extensively employed to enhance the oxygen and water vapor barrier performance of polymer materials. In this study, PS was selected to investigate the relationship between the optimal rGO loading and the oxygen/water vapor barrier properties as well as hydrogen permeability, aiming to achieve unique selective gas barrier characteristics. The water vapor transmission rate decreased significantly from 1.27 g/(m2·day) for pure PS to 0.48 g/(m2·day) for the 1% rGO-PS composite (1%GPS), demonstrating a remarkable improvement in water vapor barrier performance. Similarly, the incorporation of rGO nanofillers enhanced the oxygen barrier properties of PS, reducing the oxygen transmission rate from 4586.11 g/(m2·day) for pure PS to 138.32 g/(m2·day) for 1%GPS. Furthermore, the hydrogen transmission rates (HTR) of pure PS and 1%GPS were 907 cm2/(m2·day·0.1 MPa) and 912 cm2/(m2·day·0.1 MPa), respectively, indicating only a marginal increase in HTR. Consequently, the 1%GPS composite exhibits optimal barrier selectivity, combining superior water vapor barrier properties, oxygen barrier properties, and hydrogen permeability.
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COMBUSTION AND FLAME
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2025
·
IF 6.2
Xiandie Zhang,Haozhe Li,Xuxu Cui,Xinwen Ma,Jiaming Liu,Xiaode Guo,Xiang Zhou
The passivation layer of Al powder hinders the mass transfer during Al combustion. Fluorinated oxidants, such as metal fluorides and fluoropolymers, substantially improve the combustion behaviour of Al powder. Herein, a simple solvothermal method is employed to produce a high-entropy acicular accumulational fluorine-containing oxidiser based on ammonium fluoroferrates. The characterization results indicate that heating the fluorine-containing oxidiser can release gaseous products of HF and NH 3 . HF etches the passivation layer, and NH 3 provides kinetic energy to the fuel, resulting in multiple hot spots and secondary combustion as well as prevention of reaction sintering. Compared with traditional FeF 3 , this novel fluorine-containing oxidiser considerably improves the combustion of Al powder by reducing its onset temperature as well as increasing its exothermic enthalpy, flame area and F release ability.
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Nanomaterials
·
2025
·Vol. 15
·期 16
·1232
·
IF 4.3
Yelin Qi,Ting Liang,Wen Yang,Tengbo Ma,Siyue Zhao,Yadong Liu
The poor selectivity of metal oxide semiconductor sensors is a major constraint to their application in the detection of chemical warfare agents. We prepared a (Pt+Pd+Rh)@Al2O3/(Pt+Rh)-WO3sensor by using (Pt+Pd+Rh)@Al2O3as a catalytic film material and (Pt+Rh)-WO3as a gas-sensitive film material. Using temperature dynamic modulation, the (Pt+Pd+Rh)@Al2O3/(Pt+Rh)-WO3sensor was realised to improve the selectivity for mustard. Due to the catalytic effect of the (Pt+Pd+Rh)@Al2O3catalytic film on mustard, mustard was able to be catalytically generated into mustard sulphoxide after passing through the (Pt+Pd+Rh)@Al2O3catalytic film. Under a certain temperature dynamic modulation, the mustard concentration on the surface of the (Pt+Rh)-WO3gas-sensitive film showed an increase and then a decrease. Since the resistance response of the (Pt+Rh)-WO3gas-sensitive film to mustard was much higher than that of mustard sulphoxide, the change in the resistance of the (Pt+Rh)-WO3gas-sensitive film was mainly determined by the change in the concentration of mustard, which led to the peak signal in the curve of its resistance response to mustard. The experimental results showed that the (Pt+Pd+Rh)@Al2O3/(Pt+Rh)-WO3sensor had peak signals in the resistance response to mustard only, and not in the resistance response to 12 interfering gases, such as carbon monoxide.
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JOURNAL OF CHROMATOGRAPHY A
·
2012
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IF 4.531
Na Chang,Xiu-Ping Yan
Metal-organic frameworks (MOFs) which offer a variety of topologies, porous networks and high surface areas are promising and have potential for the applications of specific adsorption, isomerization, catalysis and separation. UIO-66 is the first MOF that has been observed to have reverse shape selectivity. However, such reverse shape selectivity of MOFs has never been explored for capillary gas chromatographic separation. Here we report the fabrication of MOF UIO-66 coated capillary column and exploration of the reverse shape selectivity and molecular sieving effect of such column for capillary gas chromatographic separation of alkane isomers and benzene homologues with excellent selectivity and precision. The adsorption enthalpies and entropies on the interaction between hydrocarbons and UIO-66 were measured to illustrate the energy effect on the separation of alkane isomers and benzene homologues on the UIO-66 coated capillary column. UIO-66 coated capillary column gave preferential retention of branched alkane isomers over their linear isomer, showing reverse shape selectivity, making UIO-66 coated capillary column attractive for capillary gas chromatographic separation of alkane isomers. iso -Propylbenzene (branched) eluted after n -propylbenzene on the UIO-66 coated capillary column again shows reverse shape selectivity. However, much bulkier 1,3,5-trimethylbenzene eluted earlier than n -propylbenzene and iso -propylbenzene on the UIO-66 coated capillary column, exhibiting molecular sieving effect. The combination of reverse shape selectivity with molecular sieving effect makes the UIO-66 coated capillary column promising for the separation of structural isomers.
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Separations
·
2025
·Vol. 12
·期 11
·304
·
IF 2.7
Wenhui Xu,Lu Wang,Mengjia Ji,Zigang Tang,Jing Liu,Hangzhen Lan,Xingtao Zhang
This study aimed to achieve efficient capture of phthalate esters (PAEs) and bisphenol A (BPA) from pear samples collected in the northern Anhui Province. A novel polystyrene–pyridine (PS/PD) composite nanofiber membrane was fabricated via electrospinning and employed as a filter in the sampling process. Following sample collection, PAEs and BPA were extracted with acetonitrile (ACN). Then, 100 μL of the extract was further concentrated using packed-fiber solid-phase extraction (PFSPE), with PS/PD nanofibers as the sorbent, and subsequently analyzed by gas chromatography–mass spectrometry (GC-MS). Under the optimized procedure, satisfactory recoveries of 87.0–109.9% were obtained for pear samples, with relative standard deviations (RSDs) ranging from 0.6% to 11.9%. Limits of detection (LOD) and limits of quantification (LOQ) were 0.03–0.10 μg/L and 0.034–0.34 μg/L, respectively. Analysis of pear samples from local markets and the native region was performed, and the detected concentrations of five PAEs and BPA ranged from 0.037 to 0.079 μg/L. Matrix effects were also evaluated. These findings demonstrate that the developed packed-nanofiber solid-phase extraction (PFSPE)-GC-MS method is reliable and effective for the determination of PAEs and BPA in pear samples.
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