MEAT SCIENCE
·
2016
·
IF 2.801
Xianchao Feng,Chenyi Li,Xu Jia,Yan Guo,Na Lei,Robert M. Hackman,Lin Chen,Guanghong Zhou
The influence of NaNO 2 content on protein oxidation and nitrosation was investigated in cooked sausages at different concentrations (0, 50, 100, 200 and 400 mg NaNO 2 /kg). Dependent on concentration, NaNO 2 had both anti- and pro-oxidant effects on protein oxidation. The antioxidant effects of NaNO 2 on the protein oxidation were evidenced by significantly lower carbonyl contents, higher free amines and lower surface hydrophobicities. The pro-oxidant effects of NaNO 2 on protein oxidation resulted in a decrease of sulfhydryls and an increase of disulfide bonds. NaNO 2 also improved the protein nitrosation inducing the formation of 3-nitrotyrosine (3-NT). Moreover, 3-NT had significant correlations with parameters of protein oxidation, indicating that 3-NT may be a possible marker for protein oxidation. Results of this study contribute to an understanding of the impact of NaNO 2 on food quality and help to identify optimal formulations of cured meat products .
研究领域:
食品科学
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2015
·
IF 2.912
Xianchao Feng,Chenyi Li,Niamat Ullah,Robert M. Hackman,Lin Chen,Guanghong Zhou
The stability of cured meat products is increased by the protection of its proteins from oxidation by sodium nitrite (NaNO2) during processing. This study investigated the effects of NaNO2 (0, 50, 100, 200, and 400 mg/kg) on the physiochemical and structural characteristics of myofibrillar protein (MP) in raw and cooked ham. The NaNO2 showed a dose-dependent antioxidant effect, by inhibiting carbonyl formation, dityrosine formation, and denaturation of MP, and a nitrosative effect, through the formation of 3-Nitrotyrosine (3-NT). The 3-NT content within MP of raw ham had distinct negative correlations with sulfhydryl content and surface hydrophobicity. The 3-NT content within MP of cooked ham had significantly negative correlations with carbonyl, sulfhydryl content and turbidity and had significantly positive correlations with disulfide content. These results indicated that 3-NT may be a potential marker for protein oxidation in raw and cooked cured meat products.
研究领域:
食品科学
·
生物化学
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2015
·
IF 2.352
Xianxiang Liu,Hui Ding,Qiong Xu,Wenzhou Zhong,Dulin Yin,Shengpei Su
A mild and simple process for the effective oxidation of 5-hydroxymethylfurfural (HMF) into 2,5-diformylfuran (DFF) has been developed using NaNO 2 as the oxidant. Some important reaction parameters were investigated to optimize the oxidation of HMF into DFF. It was found that the reaction solvent was very crucial for this reaction. Trifluoroacetic acid was the best solvent for the oxidation of HMF into DFF by NaNO 2 . Under the optimal reaction condition, almost quantitative HMF conversion and high DFF yield of 90.4% were obtained after 1 h at room temperature.
研究领域:
化学工程
·
有机化学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Guiling Luo,Hui Xie,Hamza Abdalla Yones,Si Mi,Binghang Li,Yubao Wang,Pengying Chen,Guangjiu Li,Wei Sun
In this paper the effect of gold nanochains (AuNCs) on direct electron transfer of Myoglobin (Myb) was studied in detail. A Nafion polymer dispersions, Myb solution and AuNCs solution were dropped on carbon ionic liquid electrode (CILE) in sequence to develop a new working electrode. AuNCs have high electrochemical activity with excellent biocompatibility, which serve as electron transfer path for intensifying electrochemical response of Myb. In electrolyte a pair of symmetrical redox peaks of Myb was displayed on cyclic voltammogram and electrochemical performance of this modified electrode was investigated. Myb on electrode surface exhibited good electrocatalytic reduction activity to trichloroacetic acid (TCA) and sodium nitrite (NaNO2). The electrocatalytic current displayed a linearity regression behavior to TCA concentrations from 2.0 to 400.0 mmol/L with the detection limit of 0.26 mmol/L, to NaNO2 concentrations from 0.04 to 1.8 mmol/L with the detection limit of 0.013 mmol/L. Consequently, this paper extended the utilization of AuNCs in construction of an excellent platform based on electrocatalysis of redox enzymes.
研究领域:
生物化学
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分析化学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Ting Qu,Jinpeng Zhang,Jinbo Song,Jieying Jing,Wen-Ying Li
The magnesium oxide (MgO) sorbents doped with different NaNO 3 /NaNO 2 molar ratios were prepared to improve their stability over multiple cycles. Regulating the NaNO 3 /NaNO 2 molar ratio effectively improved the CO 2 adsorption performance of the sorbent. The MgO sorbent with the NaNO 3 /NaNO 2 molar ratio of 0.8 exhibited outstanding performance and stability. Characterization and density functional theory calculations confirmed the positive effects of the appropriate NaNO 3 amount in improving the adsorption activity, whereas the suitable NaNO 2 amount slowed the sintering step and improved stability. Notably, the molten salt remained stable during cycling and did not decompose even at high regeneration temperatures, guaranteeing the cyclic stability of the sorbent. Further characterization showed that the CO 2 sorption drop in the first few cycles was ascribed to the decline in the active surface owing to the aggregation of MgO particles, incomplete regeneration of sorbents, and segregation of molten salt on the sorbent surface.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2025
·
IF 6.2
Zhencong Yang,Xue Feng,Philippe Madjirebaye,Yuting Fan,Li Yan,Zhoujin Xu,Xuli Wu
Although sodium nitrite (SN) is broadly used as a food preservative, its immunomodulatory effects on food allergy pathogenesis remain poorly understood. This study examined how subchronic SN exposure influences dendritic cell (DC)-mediated sensitization and T-cell polarization in an Ovalbumin (OVA)-induced mouse food allergy (FA) model. Our findings reveal that SN exacerbated allergic responses manifested by increased clinical symptoms, reduced weight gain, and elevated serum histamine, MCP-1, and IgE levels compared to those of OVA-sensitization alone. Mechanistically, SN promoted Th2 polarization through T-bet/GATA3 imbalance, Treg suppression, and enhanced DC activation. In vitro studies have demonstrated augmented antigen uptake by SN, MHC II expression, and selectively activated MAPK (p-JNK/ERK1/2) and STAT6 pathways, amplifying Th2 cytokine production and IgE class switching. These findings indicate that SN might disrupt immune homeostasis through coordinated modulation of DC function, Th2 polarization, and regulatory mechanisms, which highlights the potential of SN to exacerbate FA via multiple immunomodulatory pathways.
研究领域:
免疫学
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过敏与免疫学
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分子免疫学
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营养免疫学
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黏膜免疫学
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信号转导
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食品毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-10
·
IF 4.259
Chu Qiang,Zhao Yiying,Shi Xuer,Han Wen,Zhang Yanzhen,Zheng Xiaodong,Zhu Jing
To address the need for a high throughput toxicity test in the modern food industry, an in vivo -like 3-D cell model was constructed in this study to provide an alternative to controversial long-term animal models and to improve the sensitivity and accuracy of the traditional monolayer model. The model formed cell cylindroids within polyvinylidene fluoride (PVDF) hollow fibers and therefore mimicked the microenvironment of liver tissue. Microscopy methods were used, and liver-specific functions were measured to demonstrate the superiority of the model compared to the monolayer model, as well as to optimize the model for best cell performances. Later, toxicity tests of sodium nitrite and acrylamide were conducted in both the 3-D model and the monolayer model to study the sensitivity of the 3-D model in toxicity responses. As expected, HepG2 cells within the 3-D model responded at lower concentrations and shorter exposure times compared to cells within the monolayer model. Furthermore, western blot analysis of apoptosis pathways also supported the argument.
研究领域:
毒理学
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细胞生物学
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食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYST
·
2024
·
IF 3.6
Fengnian Liang,Yiqun Huang,Junjian Miao,Keqiang Lai
Sodium nitrite is a commonly used preservative and color protectant in the food industry. Conventional analytical methods are highly susceptible to food matrix interference, time-consuming and costly. In this study, the ion cross-linking method was employed to prepare alginate hydrogel substrates, and phenosafranin was chosen as a single-molecule probe to analyze sodium nitrite. Our investigation centered on elucidating the effects of alginate and cross-linking ion concentrations on Raman signal characteristics. The optimal Raman response was observed in the precursor solution with 1% sodium alginate and 0.1 mol L−1 cross-linking ions. The relative standard deviations (RSDs) of the feature peaks from the three substrate batches ranged from 1.22% to 16.30%, attesting the robustness and consistency of the substrates. The signal reduction of the substrates after a four-week storage period remained below 10%, indicating that the substrates had good reproducibility and stability. The limits of detection (LODs) for sodium nitrite in extracts from cured meat, luncheon meat, and sliced ham were determined to range from 3.75 mg kg−1 to 8.11 mg kg−1, with low interference from the food matrix. The support vector machine algorithm was utilized to train and predict the data, which proved to be more accurate (98.6%–99.8% recovery) than the traditional linear regression model (81.9%–112.7% recovery) in predicting the spiked samples. The application of hydrogel-based surface-enhanced Raman spectroscopy (SERS) substrates for nitrite detection in food, combined with machine learning for regression prediction in data processing, collectively augmented the potential of SERS technology in the field of food analysis.
研究领域:
食品科学
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分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Mengjie Ma,Yi Zhang,Yujin Ji,Qi Shao,Kui Yin,Wenxiang Zhu,Junjun Yang,Fan Liao,Zhenglong Fan,Yang Liu,Youyong Li,Mingwang Shao,Zhenhui Kang
Poisoning species, such as methanol and air pollutants, degrade the electrocatalytic activity for oxygen reduction reaction (ORR). Here, via taking advantage of the varied electronic property of nano-silicon, a versatile strategy is reported for enhancing the catalytic activity and anti-poisoning ability toward ORR by decorating noble metal catalysts with the size-controlled silicon nanoclusters (DS). Consequently, DS-Pd exhibits the enhanced ORR performance with a large halfwave potential of 0.892 V and an onset potential of 1.010 V. More importantly, it also shows enhanced anti-poisoning performance in methanol, NaNO 2 and NaHSO 3 electrolytes, compared to those of commercial Pt/C and Pd/C catalysts. Mechanism studies reveal that the synergistic effect between Pd and more oxygen-philic and less poison-philic Si nanoclusters largely abbreviate the absorption of poisoning species on the active sites. This strategy also improves the methanol-tolerant performance of Pt based catalysts, providing a versatile strategy for the fabrication of methanol-tolerant ORR catalysts.
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2022
·
IF 4.331
Fiona Hammond Quarcoo,Lijian Shi,Yujia Tong,Yaping Zhang,Changqing Miao,Weixing Li
Plant polyphenol-inspired surface modification of membranes is helpful for oil–water separation. However, the preparation of this coating is time-consuming. Herein, we introduce a rapid synthesis of the TA-APTES coating by the addition of sodium periodate (SP). The surface chemical composition and morphology of the resultant TA-APTES hybrid coatings were characterized using SEM, ATR-FTIR, and XPS. The hydrophilicity and membrane performance were investigated by the water contact angle, pure water permeability, and oil rejection for an isooctane-in-water emulsion. The experimental findings revealed that the optimal microfiltration (MF) membrane (MF-TA-APTES-SP-0.05) displayed exceptional hydrophilicity and water permeability (9558 L m–2 h–1 bar–1). The membrane realized highly efficient separation with a permeability (4117 L m–2 h–1 bar–1) and rejection of oils (>99%). Furthermore, it possessed outstanding chemical stability and maintained underwater superoleophobicity even after exposure to harsh conditions. This simple and rapid strategy of developing hydrophilic coatings as a modifier for the poly(vinylidene fluoride) membranes has potential applications in oil–water separation and wastewater treatment.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 14
·1094
·
IF 4.3
Chuang Zhu,Wenxuan He,Manting Gu,Dan Zhang,Baiyuan Tian
LiNO3-NaNO3-KNO3-NaNO2has a relatively low phase-change temperature, making it suitable for low-temperature heat utilization systems. This study focuses on the performance optimization of the quaternary molten salt to advance its applicability. A series of nanocomposites consisting of nano-SiO2/MgO and the quaternary salt are prepared. Core thermophysical properties, including phase transition behaviors and thermal transport parameters, are quantified. The incorporation of nano-SiO2/MgO induces moderate adjustments to the melting point and latent heat yet demonstrates an obvious enhancement in specific heat capacity. Optimal doping at 0.7 wt.% SiO2and 0.3 wt.% MgO yields a molten-state specific heat of 1.51 J/(g·K), representing a 6% increase over the undoped base salt (1.42 J/(g·K)). By combining the thermal diffusivity properties of the samples, this study found that the doping of nanoparticles typically induces new structures in molten salts that tend to enhance the specific heat capacity while simultaneously reducing thermal diffusivity.
研究领域:
储能
·
纳米材料
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热工工程
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
ORGANIC & BIOMOLECULAR CHEMISTRY
·
2022
·Vol. 20
·期 39
·7814-7820
·
IF 3.89
Bei Wan,Fan Cheng,Hua-Hua Wang,Atif Ali,Yan-Mei Sun,Hai-Yang Liu,Chi-Kwong Chang
Catalytic oxidation using manganese corrole is a hot topic of contemporary porphyrin chemistry, in which PhIO, TBHP, PhI(OAc)2, KHSO5 and m-CPBA are usually used as oxidants. This article reports the first selective oxidation of styrene to benzaldehyde using a manganese(III) corrole catalyst and sodium nitrite (NaNO2) as oxidant and cocatalyst at room temperature. The yield was 158.1% in air and 96.5% under a nitrogen atmosphere, showing oxygen might be involved in the reaction and that NaNO2 is an oxygen source and cocatalyst in the system. The peripheral electron-withdrawing substituents of the manganese corrole were favorable to the catalytic reaction. Radical inhibition and H218O experiments proved that the catalytic reaction was a free radical and hydrolysis-involved reaction.
研究领域:
无机化学
·
有机化学
·
催化
✓ 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）