LWT-FOOD SCIENCE AND TECHNOLOGY
·
2025
·
IF 6.6
Xing Qiao,Lian He,Yu-wen Yi,Hao Zhang,Lin Wang,Jin-Xiang Hu,Ming-feng Qiao,Hua-Chang Wu
This study aimed to elucidate how garlic-derived volatile compounds, particularly sulfur-containing odorants, dynamically migrate and accumulate within the complex matrix of light soy sauce over time. The volatile profiles at different migration intervals were analyzed using an electronic nose (E-nose) and gas chromatography-mass spectrometry (GC-MS). Systematic evaluations of differences in odor profiles and dynamic changes in volatile compounds were conducted through odor activity value (OAV) analysis and orthogonal partial least squares discriminant analysis (OPLS-DA). E-nose analysis demonstrated that prolonged migration times facilitated the transfer of sulfur-containing volatile compounds from garlic into light soy sauce, significantly increasing the response values of sensors TA/2 and T40/1 ( p < 0.05), thereby altering the aroma characteristics of the soy sauce. GC-MS analysis revealed that as migration time increased, the concentration of sulfur-containing volatile compounds(0 → 140000 μg/L) from garlic in light soy sauce significantly rose ( p < 0.05). OAV analysis suggested that the aroma profile of garlic-flavored soy sauce resulted from the combined contributions of sulfur-containing compounds and the major volatile components of soy sauce. VIP analysis based on OAV and OPLS-DA identified 18 key substances, including methyl valerate and isobutylbenzene, as the primary contributors to the differences among samples at various migration times. A key finding was the linear positive correlation observed between the migration quantity of garlic odor compounds migrating into soy sauce and migration time. This study enhances our understanding of the migration mechanisms of garlic flavor substances in light soy sauce.
研究领域:
食品科学
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分析化学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
GLASS PHYSICS AND CHEMISTRY
·
2023
·Vol. 49
·期 5
·463-477
·
IF 0.7
Wence Xu,Cao Zhao,Ma Rui,Zhang Yuxuan,Wu Nannan,Ouyang Shunli
Abstract Utilizing mining and metallurgical waste as a resource is one of the effective methods to tackle the issue of solid waste accumulation. In this study, the CaO–MgO–Al 2 O 3 –SiO 2 system glass–ceramics were prepared based on the traditional melt-casting technique using iron ore slag as the main raw material. Investigations were done on how different iron ion concentrations affected glass–ceramics properties. And the migration pattern of iron ions was explored deeply using Raman spectroscopy and FTIR. XRD revealed the crystallization ability of augite and magnetite increasing as the iron ions grew. The combination of vibrating sample magnetometer, electron backscatter diffraction, and MFM techniques indicates that the distribution of magnetite, grain size, and structure are connected to the magnetic performances of glass–ceramics. Glass–ceramics has outstanding magnetic properties and flexural strength. Therefore, it has vast potential for future development in electronic devices, wear-resistant applications, and electromagnetic shielding.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2024
·
IF 5.8
Jiajia Ma,Zhiheng Ye,Jie Zhou,Zhong-Ting Hu,Qianqian Wang,Junliang Wang,Zhiyan Pan,Mian Hu
In this study, the influences of soybean straw (SS) to spirulina platensis (SP) mass ratios and pyrolysis temperature on the evolution properties of N-containing species in pyrolytic tri-products and the nitrogen migration mechanism and involved chemical reactions during the co-pyrolysis processes were comprehensively investigated. Results indicated that co-pyrolysis of SS ang SP significantly facilitated the transformation of nitrogen into N bio-oil and N char from N gas . Increasing the amount of SP led to a decrease in the concentration of NH 3 and HCN in N gas , while their concentrations increased gradually with temperature increasing. NH 3 and HCN formation was due to H radicals attacking the N-sites of N-heterocyclic, with NH 3 formation being more strongly influenced by this process. Regarding N char , increasing the ratio of SP enhanced nitrogen incorporation reactions and promoted formation of pyridinic-N and pyrrolic-N. Conversely, decreasing the ratio of SP enhanced hydrogenation and condensation reactions, which favored the formation of quaternary-N. With increasing temperature, protein-N decomposed significantly, while pyridinic-N, pyrrolic-N, and quaternary-N remained stable. Additionally, pyridinic-N can convert to quaternary-N at temperature > 500 °C. Increasing the SP ratio greatly decreased oxygenates content while increased that of N-containing compounds in N bio-oil . The content of heterocycle-N (34.31 %) and nitriles (9.22 %) in bio-oil peaked at a ratio of 1:3, attributed to SP promoted the condensation and diazotization cyclization reactions. Furthermore, increasing the reaction temperature (from 400 to 800 °C) significantly increased the yields of heterocycles-N, while the yields of amines and amides decreased sharply due to dehydration reaction. As analyzed above, the possible nitrogen migration mechanism and involved chemical reactions were elucidated. These findings provides insights for generating high value-added N-containing chemicals and N-doped carbon materials during N-rich pyrolysis.
研究领域:
能源与环境科学
·
化学工程
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Jihong Dong,Jiabang Li,Yu Huang,Jingyu Zhong,Kai Dun,Min Wu,Lijuan Zhang,Quan Chen,Bo Pan
The lack of understanding on the environmental fate and implications of heavy metals in coal gangue (CG) has restrained its utilization. Conventional extraction methods provide empirical measures of heavy metal speciation, lacking a detailed description of bound strength, which limits long-term risk assessment. In this study, the releasing and migrating behavior of six heavy metals (Cd, As, Pb, Ni, Cu, and Cr) were investigated through an approach by combining experimental and computational investigations. The corresponding mechanisms and risks were understood and discussed on a molecular level. The results suggested that CG is primarily a natural kaolinite α-quartz and anatase mineral. The sequence extraction results showed that heavy metals in CG are mainly distributed in stable silicate and iron manganese oxide-bound states. The toxicity characteristic leaching procedure test advised Cu, Cr, Ni, and Pb had a high toxic level and thus required long-term monitoring and controlling. A quantum chemical calculation demonstrated that the heavy metals were more likely to be embedded in silicate minerals with high binding energy than those binding on the anatase surface. The findings of this research provide a promising approach to comprehensively evaluate the stability mechanism and potential long-term risks of heavy metals in solid waste.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2023
·
IF 6
Qian-Da Xu,Zhi-Long Yu,Qiang He,Wei-Cai Zeng
Migration of phenolics in meat is an important procedure for their valuable applications in meat production, which affects their modification effects on meat quality and safety. So, in present study, the migration process and regulations of phenolics in marinaded meat were investigated, and the mechanism was further explored. 50% KCl mass substitution and 30 g/L chloride were determined as optimal conditions for the marinating of phenolics (gallic acid, chlorogenic acid, epigallocatechin gallate and tannic acid) in meat. Migration of chloride and phenolics in marinating process were fitted well with exponential time-variant function. With different concentrations (6–10 μmol/mL), migration of phenolics in meat was mainly promoted by their concentration gradient. With the same concentration, order of diffusivity coefficient value for phenolics in meat was: epigallocatechin gallate > gallic acid > chlorogenic acid > tannic acid, which was attributed to their different capability to change the microstructure and water distribution of meat by interacting with myofibrillar protein. All results suggested that the migration of phenolics in meat depended on their marinating concentration, molecule size, structure characteristic and reactivity, which provided some beneficial information for the potential applications of phenolics in food industries to ameliorate meat quality and safety.
研究领域:
食品科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD SCIENCE
·
2022
·Vol. 87
·期 9
·3953-3964
·
IF 3.693
Yuan Li,Cijian Li,Meiyu Chen,Zunying Liu,Mingyong Zeng,Yaqin Hu
Sous-vide cooking is a highly praised method used to cook muscle foods because of its desired effect of providing better sensory properties by maintaining texture. In this study, we further explored the effect of water on texture by revealing the mechanisms of moisture migration. Low field nuclear magnetic resonance (LF-NMR) showed that the nonflowing water in sous-vide cooking hairtail was 2.36 ± 0.33% higher than that in traditional cooking. Magnetic resonance imaging (MRI) was used to clarify the law of moisture migration induced by temperature, and the moisture migration of the sous-vide cooking hairtail was slower during the holding heating stage. The microstructure explained the change rules of the texture. The degree of change was consistent with the moisture migration level. Digitalizing analysis quantitatively verified the effect of sous-vide cooking on the hairtail microstructure. The low moisture migration rate of sous-vide cooking resulted in a less damaged microstructure of the hairtail, manifesting as a desirable texture. Practical Application LF-NMR and MRI showed that sous-vide hairtails exhibited a lower moisture migration rate. The holding heating stage only slightly changed the microstructure of the hairtail. The digitalizing analysis confirmed the moisture migration mechanisms. Heat-induced protein denaturation was closely related to the water state.
研究领域:
食品科学
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生物物理学
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2022
·
IF 13.599
Shanjian Liu,An Zhao,Jia Liu,Mengqian Yin,Fupeng Huang,Dongmei Bi
This study aimed to investigate the mechanism of nitrogen doping, migration, and conversion during ammonia torrefaction and also explore the evolution law of the chemical structure of cellulose. The results showed that the ammonia torrefaction pretreatment could significantly optimize the distribution of nitrogen and oxygen elements in cellulose. The carbon skeleton first captured the active nitrogenous radicals to form –NH n -N, and pyridine-N and pyrrole-N originated from the conversion of –NH n -N. The existence of C O played a major role in the immobilization of nitrogen. The nitrogen in bio-oil exists mainly in the form of five- and six-membered heterocycles. The correlation analysis showed that the main precursors for the formation of nitrogenous heterocyclic compounds were five-membered O-heterocyclic compounds. Finally, the product distribution characteristics in the torrefaction-pyrolysis systems were summarized, and the nitrogen doping and conversion mechanisms were proposed. This study expanded the boundaries of cellulose pretreatment and the production of high-value chemicals.
研究领域:
生物质能
·
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2025
·
IF 9
Yang Peng,Xianqing Zhu,Qian Shen,Yun Huang,Ao Xia,Jingmiao Zhang,Xun Zhu,Qiang Liao
Co-hydrothermal carbonization (co-HTC) of microalgae and lignocellulosic biomass can boost co-hydrochar yield and nitrogen retention rate, but the co-hydrochar still suffers from low nitrogen content and porosity. Accordingly, in this study, FeCl 3 , NH 4 Cl and melamine were employed as additives to intensify the co-HTC process of microalgae (CP) and corn stalk (CS), and their impacts on the co-hydrochar yield, physicochemical properties and nitrogen transformation pathways were firstly investigated comprehensively. The results indicated that adding FeCl 3 increased co-hydrochar’s specific surface area, but the oxidation power of Fe 3+ facilitated nitrogen into the aqueous-phase products, leading to the nitrogen distribution in aqueous-phase products reaching up to 83.51 %. Melamine incorporation increased the nitrogen content of co-hydrochar (6.95 %) and oil-phase products, while reduced co-hydrochar’s porosity. NH 4 Cl was the most effective additive for nitrogen-doped hydrochar production, simultaneously increasing the yield (40.24 %), nitrogen content (8.93 %) and specific surface area (9.12 m 2 g −1 ) of co-hydrochar. The nitrogen transformation mechanism during NH 4 Cl-assisted co-HTC process could be divided into two stages. At the first stage (200 ℃–240 ℃), the NH 4 + in NH 4 Cl could react with hydrolysis intermediates (Maillard and Mannich reactions) to generate heterocyclic nitrogen compounds entering the oil-phase, which would further react with the oxygen-containing functional groups to facilitate the nitrogen enrichment in the co-hydrochar. At the second stage (240 ℃–280 ℃), a portion of hydrochar would undergo secondary degradation and formed water-soluble nitrogen-rich small molecules, which were transferred to the aqueous-phase products again. This study demonstrated the high feasibility of additive-assisted co-HTC for producing high-quality nitrogen-rich carbon materials.
研究领域:
环境科学
·
生物质能
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Bang Li,Tingjin Zhou,Honghuai Sun,Qingming Song,Ya Liu,Jia Li,Zhenming Xu
Wet-crushing with aqueous media protection is considered safer and more efficient than common inert-gas protected dry-crushing in preprocessing spent lithium-ion batteries (LIBs). However, it is also accompanied with the releasement and transformation of hazardous electrolyte, while the mechanisms and pollution impact yet remain unknown. Based on a self-built wet-crushing system, this topic was systematically investigated here. It was found that water might provide efficient cooling to the hazardous electrolyte, while dissolution was a major electrolyte migration pathway. Consequently, nearly 90% lithium hexafluorophosphate (LiPF 6 ) could be dissolved with little decomposition in 4 min, and no fluorine and phosphorus was found emitting as gas. Electrolyte organics also suffered rapid dissolution, but emission via thermal gasification, or re-emission from water via evaporation and saturation existed. Fluorine and so forth may precipitate back to the solids. Water temperature and dissolved electrolyte content were found to be the major influencing factor for the above migration and transformations, and solubility can be used as reference. Suggestions about the future wet-crushing process design with hazardous electrolyte control were proposed. Corresponding treatment strategies for exhausted gas and electrolyte enriched circulating water were discussed. These findings and suggestions would help the improvement and implementation of wet-crushing technique.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2024
·Vol. 11
·期 16
·5014-5025
·
IF 6.1
Xinyue Geng,Gaoqing Hang,Alberto J. Fernández-Carrión,Xing Ming,Sihao Deng,Lunhua He,Xiaojun Kuang,Xiaoyan Yang
Solid-state oxide ion and proton conductors are garnering significant attention due to their high ionic conductivity and potential applications in a range of electrochemical devices, including solid oxide fuel cells and gas sensors. In this study, we report the influence of partial substitution of La3+ in isolated tetrahedral LaVO4 ceramics with 0.01 mol of alkaline-earth metals Ca2+, Sr2+ and Ba2+ on the phase stability and electrical properties. It was found that acceptor doping effectively enhances mixed oxide ion and proton conductivities, with Sr2+ substitution yielding the highest conductivity, achieving ∼10−3 S cm−1 at 900 °C under a wet O2 atmosphere. DFT calculations and ab initio molecular dynamics simulations revealed that protons preferentially form hydrogen bonds with the lattice oxygen near the dopants and migrate through a continuous process of hopping and rotation between inter- and intra-tetrahedral VO4 groups. Additionally, the existence of oxygen vacancies facilitates the formation of V2O7 dimers through sharing corners with adjacent isolated VO4 tetrahedra, enabling ion exchange through a synergistic mechanism involving V2O7 dimer breaking and reforming. This research highlights the critical role of the deformation and rotational flexibility of isolated tetrahedral units in facilitating oxide ion and proton transport, underscoring the potential for developing mixed oxide ion and proton conductors in oxygen vacancy-deficient oxides with tetrahedral-based structures.
研究领域:
材料科学
·
计算化学
✓ 已验证
DOI
高影响因子
Food & Function
·
2019
·Vol. 10
·期 11
·7052-7062
·
IF 3.241
Lukai Ma,Guoqin Liu,Weiwei Cheng,Xinqi Liu,Huifan Liu,Qin Wang
In this study, the formation of two toxic reactive aldehydes, 4-hydroxy-2-hexenal (HHE) and 4-hydroxy-2-nonenal (HNE), was investigated during frying of two different foodstuffs at 180 °C for 7 h in three different vegetable oils. The results showed that HHE and HNE content in the oil after frying was lower than that in the oil fried without foods. It was mainly because of the incorporation of HHE/HNE into the fried foods. In French Fries (FF), the HNE content was higher, whereas it was lower in the fried chicken breast meat (FCBM). The bidirectional model systems consisting of the model oil frying system and the model food frying system were used. The result of the model oil system showed that the content of HNE was higher in FF for the higher hydrophobic property than that in HHE, which would be preferably bounded into the hydrophobic helical structures, whereas the lower content of HNE was observed in FCBM due to its higher reactivity towards the nucleophilic group, namely, the protein in FCBM. Furthermore, the model food frying system including starch and protein extracted from the corresponding foodstuffs verified the results in the model oil system. Finally, the probable migration mechanism of HHE and HNE in different food matrices was proposed for the first time.
研究领域:
食品科学
·
毒理学
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2014
·
IF 4.331
Jinfeng Zhang,Yingfei Hu,Xiaoliang Jiang,Shifu Chen,Sugang Meng,Xianliang Fu
A direct Z-scheme photocatalyst Bi 2 O 3 /g-C 3 N 4 was prepared by ball milling and heat treatment methods. The photocatalyst was characterized by X-ray powder diffraction (XRD), UV–vis diffuse reflection spectroscopy (DRS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer–Emmett–Teller (BET) surface areas, photoluminescence technique (PL), and electron spin resonance (ESR) technology. The photocatalytic activity was evaluated by degradation of methylene blue (MB) and rhodamine B (RhB). The results showed that Bi 2 O 3 /g-C 3 N 4 exhibited a much higher photocatalytic activity than pure g-C 3 N 4 under visible light illumination. The rate constants of MB and RhB degradation for Bi 2 O 3 (1.0 wt.%)/g-C 3 N 4 are about 3.4 and 5 times that of pure g-C 3 N 4 , respectively. The migration of photogenerated carriers adopts a Z-scheme mechanism. The photoexcited electrons in the CB of Bi 2 O 3 and photogenerated holes in the VB of g-C 3 N 4 are quickly combined, so the photoexcited electrons in the CB of g-C 3 N 4 and holes in the VB of Bi 2 O 3 participate in reduction and oxidation reactions, respectively. O 2 − , OH and h + are the major reactive species for the Bi 2 O 3 /g-C 3 N 4 photocatalytic system.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）