JOURNAL OF MATERIALS SCIENCE
·
2026
·
IF 4.4
Zhang Yong,Jiao Gongao,Ding Zuozhe,Zhang Dongzhi
Hydrogen Sulfide (H 2 S) gas can cause physiological discomfort at low concentrations and is lethal at high concentrations. It is one of the major pollutants in the petrochemical industry. In this article, carbon-modified WO 3 nanoparticle gas-sensitive sensing materials were synthesized using the hydrothermal method, and high-performance H 2 S gas-sensitive sensing devices were fabricated. At a doping ratio of 2:3, the optimal working temperature for the carbon-modified WO 3 (C-WO 3 ) nanoparticles is 160 °C. It exhibits a response value of 23.7 for 10 ppm of H 2 S gas, with a response and recovery time of 6 s/64 s. The material demonstrates excellent selectivity, repeatability, and long-term stability for detecting H 2 S gas. These outstanding performance characteristics make it a promising candidate for H 2 S gas detection applications. This modification enhances the material’s gas-sensing performance and its resistance to interference. Finally, first-principles calculations revealed the mechanism behind the improvement in the H 2 S gas-sensing performance of carbon-modified WO 3 sensing materials.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2026
·Vol. 74
·期 32
·25287-25299
·
IF 6.7
Zhang Renjun,Cao Yueqing,Jin Kai,Xia Yuxian
Metarhizium spp.
are widely used as
biocontrol
agents against insect pests, but the chemical basis underlying their
nematicidal activity remains largely unknown. Here, bioassay-guided
fractionation and GC–MS identified dimethyl disulfide (DMDS)
and dimethyl trisulfide (DMTS) as the major volatile nematicidal compounds
produced by Metarhizium anisopliae .
Both compounds exhibited concentration-dependent activity against
three plant-parasitic nematodes (PPNs), with 24 h LC 50 values
of 0.19–1.38 μg/mL for DMDS and 0.04–0.07 μg/mL
for DMTS. In tomato pot trials, the fermentation broth achieved 79.49%
control efficacy against Meloidogyne incognita , significantly higher than abamectin (68.24%). The GFP-labeled fungus
colonized tomato roots and persisted in the rhizosphere for 60 days.
Molecular docking and physiological assays suggested that DMDS and
DMTS disrupt calcium homeostasis, impair mitochondrial function, and
induce ROS accumulation. These findings provide new insight into the
volatile-mediated nematicidal activity of M. anisopliae and support its development as an environmentally friendly bionematicide.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2026
·
IF 6.2
Meina Jin,Xiaoyue Lun,Wei Mu,Yunhe Zhao,Zhengqun Zhang
The insect olfactory system serves as a critical detection mechanism, where odorant-binding proteins (OBPs) mediate recognition by binding odor molecules, thereby regulating behavioral responses. Here, we functionally characterized three male antennal-enriched OBPs (BodoOBP2, BodoOBP4, and BodoOBP8) from Bradysia odoriphaga. Fluorescence binding assays showed that these OBPs had significantly higher affinity for three sex pheromones than for five host plant volatiles, with BodoOBP8’s affinity for linolenic acid particularly outstanding (Ki = 0.44 μΜ, pH = 5.0). Molecular docking attributed these profiles to key pocket residues. RNA interference showed that dsRNA-treated males had significantly impaired female recognition. Furthermore, host-plant attraction assays showed a reduced Chinese chive orientation in dsBodoOBP2- and dsBodoOBP4-silenced adults. Our findings suggest that BodoOBP2 and BodoOBP4 mediate both pheromone communication and host-plant detection, while BodoOBP8 mainly transports pheromones. These results advance our understanding of olfactory mechanisms in Diptera and provide molecular targets for olfactory-based management of this pest.
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FOOD HYDROCOLLOIDS
·
2026
·
IF 12.4
Hailan Sun,Yunzhu Qiu,Yirong Qian,Jingyi Liang,Zeyu Yu,Xiao Chen,Liyan Zhao
This study investigated the multiscale interaction between soy protein isolate (SPI) and key volatile sulfur compounds (VSCs)—dimethyl disulfide (DMD), dimethyl trisulfide (DMT), and lenthionine (LEN)—and its functional effects in emulsion systems. Multispectral analysis and molecular docking demonstrated that VSCs primarily bind to SPI via hydrophobic interactions and hydrogen bonds. DMD, DMT, and LEN exhibited binding affinities (ΔG) of −9.01, −10.40, and −11.97 kcal/mol, respectively. Due to its distinctive cyclic conformation, LEN formed two hydrogen bonds with ASN150 and LEU152 residues, showing the strongest binding. This binding induced conformational modifications in SPI, resulting in a reduction in α-helix content (from 14.9 % to 10.5 %) and an increase in β-sheet structure (from 23.6 % to 32.3 %) following LEN interaction, indicative of partial unfolding and aggregation. Microstructural analysis corroborated VSC-driven aggregation. LEN caused the most significant changes: a 100.9 % increase in particle size and an 89.00 % decrease in surface hydrophobicity, which matched the formation of irregular aggregates seen with atomic force microscopy (AFM). In SPI-stabilized oil-in-water emulsions, the binding strength of VSCs followed the order LEN > DMT > DMD, as indicated by flavor retention measurements. Furthermore, VSCs reinforced the interfacial protein layer via hydrophobic interactions, substantially enhancing the emulsion activity index (EAI) and the stability index (ESI). Headspace-gas chromatography-ion mobility spectrometry (HS-GC-IMS) revealed that VSCs, particularly LEN, influenced flavor release by decreasing off-flavor compounds such as hexanal and 1-octen-3-one, while promoting the release of agreeable esters, including ethyl acetate and ethyl propanoate. This research provides a mechanistic foundation for designing flavor-specific functional foods, elucidating the dual role of VSCs as both flavor modulators and stabilizers within plant-based emulsion systems.
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ACS Applied Nano Materials
·
2026
·Vol. 9
·期 33
·15973-15983
·
IF 5.8
Ke Wei,Jiao Gongao,Xi Linqing,Li Guangbin,Zhang Hao,Zhu Liang,Zhang Dongzhi
Carbon disulfide (CS 2 ),
a highly toxic volatile
sulfur-containing industrial gas, poses serious risks to industrial
safety, occupational health, and the environment, creating an urgent
demand for highly sensitive and reliable detection. In this work,
hierarchical ZnO/Fe 2 O 3 nanomaterials were synthesized
via the pyrolysis of a nanosized ZIF-8 precursor for CS 2 detection. The optimized nanoheterostructures exhibited superior
CS 2 -sensing performance compared with their single-component
counterparts, benefiting from efficient interfacial charge modulation
within the n – n nanoheterojunctions
and abundant active sites provided by the hierarchical nanoarchitecture.
The optimized ZnO/Fe 2 O 3 sensor enabled highly
sensitive CS 2 detection with a theoretical LOD of 0.66
ppm. To suppress humidity-induced signal fluctuations, a CSA-optimized
CatBoost model was developed for humidity compensation and achieved
the highest prediction accuracy among the multiple metaheuristic optimization
strategies. This work provides an effective strategy for the rational
design of hierarchical nanoheterostructures with enhanced gas-sensing
performance and demonstrates an intelligent humidity compensation
approach for reliable CS 2 detection under practical operating
conditions.
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JOURNAL OF CHROMATOGRAPHY A
·
2022
·
IF 4.601
Xiaojing Li,Zhuozhuo Wang,Xiaojia Huang
Field sample preparation is important and interesting for analysis of nitrogen and sulfur containing aromatic compounds (N,S-CACs) in environmental aqueous samples. In this connection, a new functional groups-rich adsorbent based on porous monolith (ABM) was fabricated by in-situ copolymerization of allylaminocarbonylphenyl boronic acid/styrene and ethylene glycol dimethacrylate. The prepared ABM was employed as the extraction medium of homemade portable multichannel in-tip microextraction device (PMMD) for on-site entrapment of N,S-CACs in various waters. Because of the abundant functional groups, the obtained ABM/PMMD exhibited satisfactory capture capability towards studied N,S-CACs, and the enrichment factors varied from 454 to 491. Under the optimized fabrication conditions, adsorption and desorption parameters, the developed ABM/PMMD was used to field capture investigated N,S-CACs and followed by quantification with high performance liquid chromatography. The limits of detection were in the ranges of 0.00030–0.0016 µg/L. Recoveries with low, medium and high spiked contents located in the range of 82.1–118% with good repeatability (RSDs<9%). In addition, traditional laboratory sample pretreatment approach was employed to verify the reliability of the established method. Results well evidenced that the practicability of introduced ABM/PMMD in the field sample preparation of N,S-CACs in environmental waters.
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APPLIED AND ENVIRONMENTAL MICROBIOLOGY
·
2022
·Vol. 88
·期 6
·
IF 5.005
Yuan Gong,Jia-Qi Liu,Ming-Jie Xu,Chun-Mei Zhang,Jun Gao,Cheng-Guo Li,Ke Xing,Sheng Qin
Volatile organic compounds (VOCs) produced by microorganisms are considered promising environmental-safety fumigants for controlling postharvest diseases. Ceratocystis fimbriata, the pathogen of black spot disease, seriously affects the quality and yield of sweet potato in the field and postharvest. This study tested the effects of VOCs produced by Streptomyces setonii WY228 on the control of C. fimbriata in vitro and in vivo. The VOCs exhibited strong antifungal activity and significantly inhibited the growth of C. fimbriata. During the 20-day storage, VOC fumigation significantly controlled the occurrence of the pathogen, increased the content of antioxidants and defense-related enzymes and flavonoids, and boosted the starch content so as to maintain the quality of the sweet potatoes. Headspace analysis showed that the volatiles 2-ethyl-5-methylpyrazine and dimethyl disulfide significantly inhibited the mycelial growth and spore germination of C. fimbriata in a dose-dependent manner. Fumigation with 100 μL/L 2-ethyl-5-methylpyrazine completely controlled the pathogen in vivo after 10 days of storage. Transcriptome analysis showed that volatiles mainly downregulated the ribosomal synthesis genes and activated the proteasome system of the pathogen in response to VOC stress, while the genes related to spore development, cell membrane synthesis, mitochondrial function, and hydrolase and toxin synthesis were also downregulated, indicating that WY228-produced VOCs have diverse modes of action for pathogen control. Our study demonstrates that fumigation of sweet potato tuberous roots with S. setonii WY228 or use of formulations based on the VOCs is a promising new strategy to control sweet potato and other food and fruit pathogens during storage and shipment.IMPORTANCE Black spot disease caused by Ceratocystis fimbriata has caused huge economic losses to worldwide sweet potato production. At present, the control of C. fimbriata mainly depends on toxic fungicides, and there is a lack of effective alternative strategies. The research on biological control of sweet potato black spot disease is also very limited. An efficient biocontrol technique against pathogens using microbial volatile organic compounds could be an alternative method to control this disease. Our study revealed the significant biological control effect of volatile organic compounds of Streptomyces setonii WY228 on black spot disease of postharvest sweet potato and the complex antifungal mechanism against C. fimbriata. Our data demonstrated that Streptomyces setonii WY228 and its volatile 2-ethyl-5-methylpyrazine could be a candidate strain and compound for the creation of fumigants and showed the important potential of biotechnology applications in the field of food and agriculture.
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Current Research in Food Science
·
2023
·
IF 6.3
Yilin Li,Houyin Wang,Ruotong Li,Guirong Liu,Kui Zhong,Lipeng Gao,Baoqing Zhu,Anwen Jin,Bolin Shi,Lei Zhao,Sisi Wang
This study combined gas chromatography-mass spectrometry (GC-MS) and odor activity value (OAV) assessments to analyze the volatile ingredient changes in formula powder during 11 months of storage at room temperature. Orthogonal partial least squares-discriminant analysis (OPLS-DA) and variable importance in projection (VIP) were also used to assess the potential indicators of aroma changes during storage. The aim was to expose the possible changes in the aroma profile and the substances that alter infant formula (IF) aroma during storage. The results showed that the aldehyde and ketone content in the milk formula increased as the storage time was extended, while the lactone and terpenoid levels decreased significantly. The OAV indicated the presence of various major aromatic substances at different storage times. Considering consumer concern regarding product flavor, this study ascertained that monitoring substance changes during storage showed that 2-heptanone was a good indicator of milk flavor, dimethyl disulfide was a suitable indicator of protein degradation, and 3-methylbutanal, heptanal, hexanal, pentanal, and octanal were all good indicators of fat oxidation. The results of previous related studies were used to supplement the data in this work regarding the changes in IF during product shelf life and to provide support for controlling the flavor substances and quality during new product development.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Xiaohui Wang,Yuqi Wan,Jingkun Li,Yukihiro Ozaki,Jiahua Wang,Fuwei Pi
Surface-enhanced Raman scattering (SERS) has extraordinary potential in detecting hydrogen sulfide (H 2 S) gas molecules due to its high sensitivity and specificity. However, constructing SERS substrates with strong Raman signal enhancement effects has been a major challenge. In this study, a gold/silver nanostars (Au/Ag NSs) islands chip was developed, leveraging the phenomenon that the SERS enhancement can be significantly improved by patterning plasmonic metals with micro/nanostructures. Compared to the SERS mapping spectrogram of the conventional homogeneous Au/Ag NSs chip, uniform and dense hot spots were formed on the surface of the island chip, which is the key to remarkable enhancement of Raman signal. Both chips were functionalized with 4-mercaptophenylboronic acid (4-MPBA) for the quantitative detection of H 2 S. The islands chip displays 1.6 folds and 2 orders higher blank Raman signal intensity and a limit of detection (LOD) for H 2 S than conventional homogeneous SERS chips, respectively. The islands chip is also used for on-line monitoring of spoilage in high-protein foods. The detection ranges for H 2 S were 2 × 10 −8 M – 2 × 10 −3 M, with a LOD of 1.9 nM. This sensing strategy provides not only a novel approach for on-ling gaseous hazards detection for food spoilage but also a potential possibility for monitoring gas molecules in the environment.
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RSC Advances
·
2015
·Vol. 6
·期 6
·4803-4809
·
IF 3.84
Jing-jing Li,Fei Zhou,Xiao-dong Tang,Tao Hu,Jin Cheng
With the increasing awareness of environmental protection, deep desulfurization of methyl tert-butyl ether (MTBE), which is the most important octane booster in gasoline, is extremely urgent. Herein, a new desulfurization method, involving the combination of electrochemical oxidation and distillation, is proposed to reduce the sulfur content in MTBE. Under optimum operating conditions, the sulfur content of real MTBE decreases from 132.5 μg g−1 to 2.3 μg g−1 and the desulfurization efficiency reaches 98.25%. The oxidation products with high boiling points can be separated by distillation. FTIR analyses prove that electrochemical oxidation has no influence on the main properties of MTBE. Moreover, GC/MS is used to study the conversion of model organic sulfides (dimethyl disulfide, diethyl sulfide and butyl mercaptan) in the electrochemical oxidative desulfurization process. Finally, the possible reaction mechanism of the electrochemical oxidative desulfurization of MTBE is proposed.
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Heliyon
·
2024
·
IF 3.4
Yimeng Ren,Longzhu Zhou,Yujie Shi,Yanan Yu,Weihai Xing,Qingyu Zhao,Junmin Zhang,Yueyu Bai,Jing Li,Chaohua Tang
Beef flavor profiles are strongly influenced by cooking methods and lipid composition. However, the effect of instant-boiling on the aroma of different beef slices was unclear. This study investigated the lipid profiles and instant-boiling volatile profiles of chuck tender (M. Supraspinatus ), sirloin (M. Longissimus dorsi ) and silverside (M. Biceps femoris ). Quantitative lipidomics identified 336 lipid molecular species, of which 84–112 were quantitatively different among the three beef slices. Sirloin had lower phosphatidylcholine, phosphatidylinositol, phosphatidylglycerol and free fatty acids than chuck tender and silverside. The unsaturated fatty acid acyl chains in phosphatidylethanolamine differed significantly. Solid phase microextraction-gas chromatography-olfactometry-mass spectrometry (SPME-GC-O-MS) identified hexanal, octanal, nonanal, decanal, (E)-2-octenal, (E)-2-nonenal, (E)-2-undecenal, (E,E)-2,4-nonadienal, (E,E)-2,4-decadienal, 1-octen-3-ol, 2-pentylfuran and acetoin as the aroma-active compounds of instant-boiled beef. Unsaturated free fatty acids and phosphatidylglycerols with unsaturated fatty acid residues positively correlated with the aroma-active compounds and might be crucial in flavor differences among the three beef slices. These findings provide greater understanding of the lipid and instant-boiling aroma-active compound profiles in chuck tender, sirloin and silverside, and reflect the suitability of different beef slices for instant-boiling from the aroma perspective.
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GENE
·
2024
·
IF 2.6
Haoran Pei,Gang Xie,Xiang Yao,Shenghui Wang,Jin Yan,Liangying Dai,Yunsheng Wang
Odorant-binding proteins (OBPs) are crucial in insect olfaction. The most abundant expressed OBP of citrus psyllids, DcitOBP9 encodes 148 amino acids. DcitOBP9 lacks a transmembrane structure and possesses a 17-amino acid signal peptide at the N-terminus. Characterized by the six conserved cysteine sites, DcitOBP9 is classified as the Classical-OBP family. RT-qPCR experiments revealed ubiquitous expression of DcitOBP9 across all developmental stages of the citrus psyllid, with predominant expression in adults antennae. Fluorescence competitive binding assays demonstrated DcitOBP9′s strong affinity for ocimene, linalool, dodecanoic acid, and citral, and moderate affinity for dimethyl trisulfide. Additionally, it binds to myrcia, (−)- trans -caryophyllene, (±)-Citronellal, nonanal, and (+)-α-pinene. Among them, ocimene, linalool, and dodecanoic acid were dynamically bound to DcitOBP9, while citral was statically bound to DcitOBP9. Molecular docking simulations with the top five ligands indicated that amino acid residues V92, S72, P128, L91, L75, and A76 are pivotal in the interaction between DcitOBP9 and these odorants. These findings suggest DcitOBP9′s involvement in the citrus psyllid's host plant recognition and selection behaviors, thereby laying a foundation for elucidating the potential physiological and biological functions of DcitOBP9 and developing attractants.
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危险品化学品经营许可证（带存储）