Journal of Food Measurement and Characterization
·
2024
·
IF 2.9
Liang Heng-Yu,Xiao Yang,Gao Hao-Xiang,Zeng Wei-Cai
Ligustrum robustum (Rxob.) Blume was utilized as an natural additive to protect oil quality during the high temperature processing. L. robustum exhibited the remarkable capability to inhibit peroxide value, acid value, viscosity and color deterioration of oil. Meanwhile, L. robustum inhibited the decomposition of unsaturated fatty acids and the formation of trans fatty acids to protect the nutritional value of the oil. In addition, L. robustum increased the initial oxidation temperature of oil and raised its initial decomposition temperature. With high content of total phenols (126.9 g gallic acid equivalent /kg extract) and flavonoids (135.6 g rutin equivalent /kg extract), L. robustum showed the remarkable antioxidant and reducing capacities and was effective in scavenging free radicals and inhibiting lipid peroxidation. Furthermore, Ligurobustoside B was identified as the phenolic component in L. robustum sample with the high amount. All present results suggest that L. robustum has potential to be utilized as the natural additive for protecting oil quality during the high temperature processing. Chemical compounds studied in this article Ligurobustoside B (PubChem CID: 102,316,894).
研究领域:
食品科学
·
植物学
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DOI
高影响因子
ELECTROANALYSIS
·
2024
·
IF 2.7
Jiaqi Fu,Jincheng Du,Ting Hou,Zhong Wang,Liyuan Sui,Jinlian Li,Yanli Zhao,Ximing Cui,Dongmei Wu
Electrochemistry with purines as indicators may be a promising new method for antibiotic activity testing. However, the traditional electrochemical detection method (S-LSV) requires a long accumulation time for purines and has low signal intensity. High-temperature treatment of bacterial samples may significantly enhance the signal intensity and speed of detection. However, this process may also impact the structure and metabolism of bacteria. Further research is necessary to determine how electrochemical signals respond to antibiotic antibacterial activity. In this paper, the electrochemical detection method based on heat-treated Escherichia coli ( E. coli , H-LSV) was used to investigate the effects of 11 antibiotics with four different antibacterial mechanisms on the electrochemical behavior of E. coli . The results showed that compared to the S-LSV, the electrochemical signal of E. coli detected by the H-LSV increased by 362%, and showed a strong linear relationship with bacterial counts up to 1.88×10 8 CFU/mL, with a detection limit of 1.15×10 6 CFU/mL. The electrochemical signal consistently correlated with changes in viable E. coli counts following treatment with the four different antibacterial mechanisms. HPLC analysis further confirmed that the changes in purine contents in bacteria after antibiotic treatment were consistent with the trends in electrochemical signals. The evaluation of antibiotic antibacterial ability by H-LSV showed good consistency with results from plate counting and turbidity methods, but was closer to the results of plate counting. The inhibition rates of antibiotics on E. coli detected by H-LSV and S-LSV also showed high consistency, indicating that short-term high-temperature treatment of E. coli did not affect the response of the bacterium to the inhibitory activity of antibiotics.
研究领域:
微生物学
·
药理学
·
分析化学
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DOI
高影响因子
Food & Function
·
2017
·Vol. 8
·期 7
·2558-2565
·
IF 3.247
Yao Li,Jingran Bi,Shan Liu,Haitao Wang,Chenxu Yu,Dongmei Li,Bei-Wei Zhu,Mingqian Tan
The presence of nanomaterials during food processing has attracted significant concern due to the physicochemical properties of nanomaterials. In this study, the presence and formation of nitrogen-containing fluorescence carbon dots (C-dots) in a grilled hamburger at different temperatures (220, 260, and 300 °C) were investigated during the pyrolysis process. The size and morphology of the C-dots were found to be highly dependent on the heating temperatures, which again affected the functional groups on their surface. The C-dots are strongly fluorescent with multicolor emission accompanied by a gradual decrease in fluorescence intensity. The fluorescence quantum yield of the C-dots produced at 260 °C was measured to be 23.25%. The potential cytotoxicity and biodistribution of the C-dots within live organisms were examined with the mouse osteoblasts cell line and mung bean sprout, respectively. The cell viability after 24 h incubation remained 79% for the C-dots obtained at 300 °C at a concentration of 3.2 mg mL−1, and no obvious phytotoxicity in the growing mung bean sprout was observed. The results showed an increased cytotoxicity of the C-dots formed at higher temperatures.
研究领域:
食品科学
·
毒理学
·
纳米生物学
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Jianjun Li,Yanfeng Wu,Jungang Cao,Zhonglin Wei,Ying Guo,Qun Wang,Qingyu Peng,Yibin Li,Xiaodong He
In this paper, SiO 2 -TiO 2 hybrid fibres are fabricated using the electrospinning technique and Eu 3+ is successfully doped into the fibres through a simple sol-gel approach. The obtained SiO 2 -TiO 2 hybrid fibres are subjected to heat treatments at 600 °C, 800 °C and 1200 °C. The silica fibres subjected to a high temperature of 1200 °C become brittle and easily broken. Furthermore, the X-ray diffraction patterns demonstrate that crystalline titania forms in the SiO 2 -TiO 2 samples treated at 1200 °C, and excellent flexibility is demonstrated in the corresponding SiO 2 -TiO 2 non-woven mat. Moreover, the stress-strain curve demonstrates that the SiO 2 -TiO 2 mat heat-treated at 1200 °C exhibits typical elastic-plastic behaviour. Finally, the emission intensity of Eu 3+ of the SiO 2 -TiO 2 fibres is higher than that of the analogous SiO 2 fibres. This method can be adapted to fabricate inorganic-based hybrid fibres and will pave the way for the implementation of SiO 2 -TiO 2 non-woven mats in related research fields.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
Frontiers in Energy Research
·
2020
·
IF 2.746
Yang Qianwen,Chen Langlang,Feng Xiang,Li De,Chen Yong
Being a graphite-like material, LiBC can deliver a high capacity as an anode material in Li-ion batteries, which are strongly dependent on carbon precursors. Developing a method to improve the capacity would be significant to the study and utilization of LiBC anode material. Here we treated a pristine LiBC material with a high temperature to obtain four modified LiBC samples. A reversible capacity of 353 mAh/g was delivered by a modified LiBC sample treated at 600°C for 10 h in a powder form wrapped with an Al foil, which was only 218 mAh/g for the pristine LiBC in Li-ion batteries. According to the XRD result, the layer structure of LiBC was maintained after the high-temperature treatment, while the lattice parameters were changed slightly, especially for the interlayer distance. The modified LiBC samples showed a similar Raman spectra to the pristine LiBC except for the peak intensity, which indicates lithium evaporation during high-temperature treatment. Thereby, the high-temperature treatment can improve the capacity of LiBC through reducing the lithium content and modifying the crystal structure, and this method would make the LiBC material become a more promising anode material in Li-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Jiangtao Li,Xiaoxia Hu,Junpeng Jiang,Anran Guo,Liwen Yan,Haiyan Du,Linlin Guo,Jiachen Liu
Ceramic fiber fabric embrittlement at 1200 °C, resulting in poor tensile strength. In order to improve the tensile strength of ceramic fiber fabric after high temperature heat treatment. In this study, gradient coating is sprayed on the surface of ceramic fiber fabric by adjusting the composition of two kinds of slurry. The structure and property of ceramic fiber fabric with different coating are thoroughly investigated. The pore size of Al 2 O 3 -SiC porous transition layer is less than 1 μm, which limits the infiltration of the high-emission coating into the ceramic fiber fabric. A weak bond is formed between the ceramic fiber fabric and the porous transition layer, which induces the crack deflection. The flexibility of ceramic fiber fabric after heat treatment is significantly improved. After being heated by butane flame at 1200 °C for 20 min, the tensile strength of fiber fabric with gradient coating is double that of raw ceramic fiber fabric. The silicone cross-links to form a network, which improves the bonding strength of the gradient coating. Due to the high emissivity and low thermal conductivity of the gradient coating, the temperature of the ceramic fiber fabric is below 900 °C when heated by the butane flame.
研究领域:
材料科学
·
涂层技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2025
·
IF 3.2
Zhang Wenlong,Wang Bin,Xu Yuxin,Chen Xiao,Zhang Kuibao,Hao Yan
To enhance the thermal stability of SiO 2 aerogels at high temperature, this study proposes a method involving the incorporation of MgAl 2 O 4 nanoparticles into SiO 2 aerogels to improve their high-temperature stability. By comparing the performance of MgAl 2 O 4 -SiO 2 aerogel with pure SiO 2 aerogels after heat treatment at high temperatures, it is demonstrated that the MgAl 2 O 4 nanoparticles significantly enhances the thermal stability of SiO 2 aerogels at elevated temperatures while almost no effect on thermal conductivity, about 0.0312 and 0.0322 W/(m·K). The MgAl 2 O 4 -SiO 2 aerogels exhibit superior thermal stability and insulation performance compared to pure SiO 2 aerogels at temperatures exceeding 800 ℃. Notably, even after heat treatment at 1100℃, a condition that causes pure SiO 2 aerogels to nearly lose their porous structure, the MgAl 2 O 4 -SiO 2 aerogels retain a specific surface area of 81.95 m 2 /g and thermal conductivity of 0.0584 W/(m·K).
研究领域:
材料科学
·
无机化学
·
热力学
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2018
·Vol. 28
·期 10
·1706276
·
IF 13.325
Liangbin Xiong,Minchao Qin,Cong Chen,Jian Wen,Guang Yang,Yaxiong Guo,Junjie Ma,Qi Zhang,Pingli Qin,Songzhan Li,Guojia Fang
Planar perovskite solar cells (PSCs) based on low-temperature-processed (LTP) SnO 2 have demonstrated excellent photovoltaic properties duo to the high electron mobility, wide bandgap, and suitable band energy alignment of LTP SnO 2 . However, planar PSCs or mesoporous (mp) PSCs based on high-temperature-processed (HTP) SnO 2 show much degraded performance. Here, a new strategy with fully HTP Mg-doped quantum dot SnO 2 as blocking layer (bl) and a quite thin SnO 2 nanoparticle as mp layer are developed. The performances of both planar and mp PSCs has been greatly improved. The use of Mg-SnO 2 in planar PSCs yields a high-stabilized power conversion efficiency (PCE) of close to 17%. The champion of mp cells exhibits hysteresis free and stable performance with a high-stabilized PCE of 19.12%. The inclusion of thin mp SnO 2 in PSCs not only plays a role of an energy bridge, facilitating electrons transfer from perovskite to SnO 2 bl, but also enhances the contact area of SnO 2 with perovskite absorber. Impedance analysis suggests that the thin mp layer is an “active scaffold” selectively collecting electrons from perovskite and can eliminate hysteresis and effectively suppress recombination. This is an inspiring advance toward high-performance PSCs with HTP mp SnO 2 .
研究领域:
材料科学
·
光伏技术
·
纳米技术
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产品关联
DOI
高影响因子
Optical Materials Express
·
2016
·Vol. 7
·期 1
·32-42
·
IF 2.657
Bin Sun,Yan Wang,Guifu Ding
We report on the fabrication, characterization, and field emission behavior of cold electron cathodes that are specifically designed to be used for X-ray sources. The emitter was designed as a two-tier system, with the patterned CNT field emission array and the Pt comb electrode beneath. The micromachining patterning process, which enhanced the edge effect, significantly improved the field emission performance. By using an inorganic binder, the cathode could resist high temperature annealing up to 800°C. Our novel emitter showed relatively good field emission properties such as low turn on field, high current density, and good stability. We ascribed the improved emission properties after the annealing process to the oxygen desorption induced decrease of work function, and defect annealing which could stabilize the emitter. To check the application of the emitter, the fabricated emitter was sealed in a conventional X-ray tube. The blackened shade on the sensitive film confirmed the X-ray generation, which demonstrated that our emitter successfully survived the high temperature processing steps of the X-ray source fabrication.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 21
·11280-11288
·
IF 2.936
Qingna Lin,Lipeng Han,Guoqin Liu,Weiwei Cheng,Liqing Wang
The formation of food-derived glycated phosphatidylethanolamine (PE) in thermal process was investigated by designing a 1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine (DPPE)-glucose model system heated from 40 to 100 °C for 8 h. The main products of glycated PE were determined by high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). Results showed that the glycation of DPPE formed three major glycated compounds: amadori-glycated-1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine (Amadori-DPPE), carboxymethyl-1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine (CM-DPPE), and carboxyethyl-1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine (CE-DPPE). Amadori-DPPE was identified to generate CM-DPPE through oxidative cleavage of glycated polar head group under high temperature and extended incubation time. Additionally, during thermal processing, retro-aldol reactions of glucose led to the formation of two reactive dicarbonyl intermediates: glyoxal (GO) and methylglyoxal (MGO), both of them reacted with amino group of DPPE to form CM-DPPE and CE-DPPE, respectively. Thus, the formation pathways of CM-PE might involve the irreversible rearrangements of Amadori-PE following oxidative cleavage, as well as the glycation of amino group of PE with GO. CE-PE could only be formed by reaction of PE with MGO. Moreover, the content of CM-DPPE was higher than that of CE-DPPE in the same incubation conditions, which indicated that CM-PE might be a more useful predictive marker for food-derived glycated amino-phospholipid, rather than Amadori-PE, particularly in thermal processed foodstuffs.
研究领域:
食品科学
·
生物化学
·
营养学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2020
·Vol. 103
·期 9
·4957-4968
·
IF 3.502
Shengjian Zhao,Shaohua Qin,Zhanlin Jia,Shuai Fu,Peigang He,Xiaoming Duan,Zhihua Yang,Daxin Li,Dechang Jia,Jie Zhang,Yu Zhou
In this paper, monoclinic SrAl 2 Si 2 O 8 ceramics with porous structures were prepared based on ion-exchanged geopolymer precursor technique. Micron-level pores with a homogeneous pore-size distribution were introduced into the inorganic framework using foaming agents. The results demonstrated that the apparent density, pore-size distribution and specific surface area of porous geopolymer precursors can be well-engineered via tailoring the category and concentration of the foaming agent. After being treated at 900°C, hexagonal SrAl 2 Si 2 O 8 first-crystallized from the amorphous geopolymer matrix and then gradually converted into monoclinic SrAl 2 Si 2 O 8 between 1100°C and 1200°C. The resulting monoclinic SrAl 2 Si 2 O 8 ceramics maintained the porous structures during high-temperature treatments and exhibited high porosity, specific surface area, and compressive strength. The aforementioned strategy not only achieves monoclinic SrAl 2 Si 2 O 8 ceramics with well-defined and robust microstructures, but also provides an alternative route to prepare other porous ceramics, with potential applications in fields of high-temperature filters, adsorbents, and heterogeneous catalysis.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Huaneng Su,Tianen Wu,Huiyuan Liu,Weiqi Zhang,Qian Xu,Jianwei Ren
Liquid water flooding is one of the major challenges in the high current density operation of proton exchange membrane fuel cells (PEMFCs). Optimizing microstructure and properties of gas diffusion layer (GDL), as an essential diffusion medium in PEMFCs, is considered as a promising approach to ensure the long-term stable operation of PEMFCs at high current densities. Herein, we report a simple elevated temperature treatment technique to enhance the hydrothermal durability and water removal capacity of GDLs. Although elevating the heat-treatment temperature from 330 °C (most commonly used) to 430 °C has no obvious impact on the GDLs’ surface hydrophobicity , the GDL treated at 430 °C exhibits excellent hydrothermal stability and water removal capacity due to the increased dispersion of polytetrafluoroethylene (PTFE). In PEMFC, the membrane electrode assembly (MEA) containing the elevated-temperature-treated GDL could maintain high performance at high current densities and high humidity conditions. 200 h steady state test at high current densities and high humidity conditions manifests that the MEA with elevated-temperature-treated GDL is more stable and has better water removal capacity than the MEA with normal-temperature-treated GDL.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）