JOURNAL OF ORGANIC CHEMISTRY
·
2017
·
IF 4.849
Qiujie Tang,Zhaogang Bian,Wei Wu,Jin Wang,Ping Xie,Charles U. Pittman,Jr.,Aihua Zhou
The method for constructing C–S bonds is very important in organic synthesis. Here a new sulfenylation method to generate flavone thioether derivatives was developed by employing aromatic or alkyl halides, S powder and Na2S2O3 as reactants. Good yields of regioselective Calkyl–S and Caryl–S-substituted flavones were generated under relatively environmentally friendly and simple conditions. This method might be potentially applicable to large scale production, and it enriches current sulfenylation methods.
研究领域:
有机化学
·
药物合成
✓ 已验证
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2020
·
IF 6.306
Lu Yang,Jie Jia,Xuefu Zhou,Meichen Liu,Qinjun Zhang,Liangjie Tian,Wen Tan,Yanjun Yang,Xuebo Liu,Xiang Duan
Phosvitin (PSV) is considered as a good emulsifier, although it has a low proportion of hydrophobic regions and steric hindrance. Wheat gluten (WG) possesses excellent hydrophobicity and macromolecular network structure. In this work, WG was subjected to a series of Na 2 SO 3 solution, followed by cross-linking with PSV under transglutaminase (TGase) catalyzation. The results showed that Na 2 SO 3 could break disulfide bonds of WG and increase its solubility from 7.33% to 42.82% with 1200 mg/L of Na 2 SO 3 . Correspondingly, the cross-linking degree was significantly enhanced. Compared to PSV, the cross-linked PSV-WG exhibited a higher surface hydrophobicity and thermal stability, with a lower zeta potential and apparent viscosity. The emulsifying activity of PSV-WG reached 17.42, 20.63 and 20.28 m 2 /g with Na 2 SO 3 concentration of 300, 600 and 900 mg/L, which were all higher than that of PSV (15.19 m 2 /g). This work provided a novel strategy to elevate emulsifying properties of PSV by cross-link reaction.
研究领域:
食品科学
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
JOM
·
2019
·Vol. 71
·期 10
·3673-3681
·
IF 2.305
Gao Guilan,He Xin,Lou Xiaoyi,Jiao Zheng,Guo Yaoguang,Chen Shuai,Luo Xingmin,Sun Suyang,Guan Jie,Yuan Hao
Recycling of valuable metals from spent lithium-ion batteries (LIBs) appears inevitable for both environmental protection and resource recovery. In the present study, an efficient hydrometallurgical leaching of Co and Li from cathode materials of spent LIBs using a citric acid/sodium thiosulfate (Na 2 S 2 O 3 ) system is explored. The effects of citric acid and Na 2 S 2 O 3 concentrations, leaching time, temperature, and the solid/liquid ( S / L ) ratio on the leaching processes are also examined. With the exception of the S / L ratio, the increase of citric acid concentration, Na 2 S 2 O 3 concentration, leaching time, and temperature all have positive effects on the leaching of Co and Li. Ultimately, approximately 96% of Co and 99% of Li are recycled from the spent LIBs in this citric acid/sodium thiosulfate system under the leaching conditions of an S / L ratio of 20 g l −1 , concentration of Na 2 S 2 O 3 of 0.3 M, concentration of citric acid of 1.2 M, leaching time of 30 min, and leaching temperature of 70°C. The Avrami equation is well fitted by the data of the leaching processes, and model equations are built to describe the leaching of Co and Li. Furthermore, pure sulfur can be obtained as a by-product during the leaching process, and SO 2 produced during the reaction is easily collected as a raw material for industrial production of sulfuric acid. The present study represents a promising process for hydrometallurgical recovery of valuable metals from spent LIBs.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2020
·
IF 3.421
Shuai Chen,Wei Zhou,Yani Ding,Guang-Bo Zhao,Ji-Hui Gao
The potential energy of SO2 is wasted in the process of converting Na2SO3 to Na2SO4 via air oxidation during conventional treatment of SO2-contaminated air. Considering that the oxidation of Na2SO3 is thermodynamically and kinetically much easier than the oxygen evolution reaction (OER), this study proposes replacing the OER with Na2SO3 oxidation to recover the potential energy of SO2 and simultaneously reduce the energy consumption of water electrolysis. First, the influences of the reaction temperature and Na2SO3 concentration on Na2SO3-assisted water electrolysis (SAWE) were studied. Then, the difference between Na2SO3 electrolysis and water electrolysis was compared under optimum conditions. Furthermore, the long-term stability of SAWE was assessed. The results of this study suggest that the onset potential of water electrolysis decreases from 0.73 V vs saturated calomel electrode (SCE) to 0.28 V vs SCE by replacing the OER with Na2SO3 oxidation. The energy consumption of producing hydrogen by water electrolysis is reduced with the use of the potential energy of SO2. For SAWE, the Na2SO3 oxidation kinetics and hydrogen production rate are improved as the reaction temperature and Na2SO3 concentration increase.
研究领域:
环境科学
·
能源工程
✓ 已验证
DOI
高影响因子
JOURNAL OF FOOD SCIENCE
·
2024
·Vol. 89
·期 8
·4839-4855
·
IF 3.2
Yaxin Li,Zheng Zhou,Qi Wu,Baoguo Chen,Shuhong Ye,Yuna Cui,Yan Ding
Mung bean sprouts are widely consumed as a seasonal fresh vegetable, renowned for their affordability and richness in antioxidants and bioactive compounds. This study employed ultra-high-performance liquid chromatogram-Q-Exactive HF mass spectrometry (UHPLC-QE-MS) and multivariate statistical analysis to comprehensively evaluate the chemical profile of mung bean sprouts following sulfite immersion. The findings revealed a significant alteration in the overall chemical composition of mung bean sprouts following sodium sulfite immersion. Eleven components, including four sulfur-containing compounds, were identified as characteristic markers distinguishing between non-immersed and sodium sulfite-immersed mung bean sprouts. Esterification and addition reactions were inferred to occur during sodium sulfite immersion, leading to the transformation of flavonoid and saponin sulfates. Commercial samples analysis indicated that sulfur-containing compounds were detectable in 9 of 11 commercial mung bean sprouts. Meanwhile, when sodium sulfite concentration exceeded 3.00 mg/mL and immersion time exceeded 360 min, the contents of total polyphenol and flavonoid were significantly reduced and the antioxidant activity was adversely influenced.
研究领域:
食品科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2024
·
IF 7.7
Mei An,Xiaoxiang Cheng,Xinsheng Luo,Tao Yang,Xianpeng Sun,Jingtao Xu,Dao Xiao,Daoji Wu,Heng Liang
Ultrafiltration (UF) is a highly efficient technique for algal-rich water purification, but it is heavily contaminated due to the complex water characteristics. To solve this problem, potassium permanganate (KMnO 4 ) oxidation enhanced with sodium sulfite (Na 2 SO 3 ) was proposed as a pretreatment means. The results showed that the end-normalized flux was elevated from 0.10 to 0.91, and the reversible fouling resistance was reduced by 99.95%. The membrane fouling mechanism also changed obviously, without the generation of cake filtration. Regarding the properties of algal-rich water, the zeta potential was decreased from −29.50 to −5.87 mV after KMnO 4 /Na 2 SO 3 pretreatment, suggesting that the electrostatic repulsion was significantly reduced. Meanwhile, the fluorescent components in algal-rich water were significantly eliminated, and the removal of dissolved organic carbon was increased to 67.46%. In the KMnO 4 /Na 2 SO 3 process, reactive manganese species (i.e., Mn(V), Mn(III) and MnO 2 ) and reactive oxygen species (i.e., SO 4 •− and • OH) played major roles in purifying algal-rich water. Specifically, SO 4 •− , • OH, Mn(V) and Mn(III) could effectively oxidize algal pollutants. Simultaneously, the in-situ adsorption and coagulation of MnO 2 could accelerate the formation of flocs by decreasing the electrostatic repulsion between cells, and protect the algal cells from being excessive oxidized. Overall, the KMnO 4 /Na 2 SO 3 process showed significant potential for membrane fouling alleviation in purifying algal-rich water.
研究领域:
环境科学
·
水处理工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2016
·
IF 2.75
Oluwasola Oribayo,Xianshe Feng,Garry L. Rempel,Qinmin Pan
Oil spills have serious impact on the environment, and its effective remediation for environmental protection is of global significance. Thus, oil sorbents with interconnected microporous structures having superoleophilic and superhydrophobic properties have attracted significant interest as sorption materials for oil spill clean-ups. In this study, an approach inspired by the adhesive proteins secreted by mussels was used in modifying a commercially available formaldehyde-melamine-sodium bisulfite copolymer foam ( FMSF) as a thiols and amine functionalized oil/solvent sorption material, resulting in significantly improved hydrophobicity and oleophilicity. Our strategy was based on facile conjugation of octadecylamine (ODA) and 1H,1H,2H,2H perfluorodecanethiol (PFD) molecules to polydopamine (PDA) adhered to the interior micropores of FMSF. The FMSF-PDA-PFD and FMSF-PDA-ODA foams so prepared showed excellent oil/water selectivity, without damaging its intrinsic 3-D porous structure. In oil and solvent sorption experiments using engine oil and chloroform , a very high oil sorption capacity (amounting to 84 and 152 times its own weight) was obtained respectively. They also showed excellent reusability, and the same good oil sorption capacity was retained after 50 cycles of sorption-squeezing steps. The absorbed oil in the foams could be removed and collected simply by squeezing, and the foams became ready for reuse. The superhydrophobic and superoleophilic foams exhibited a significant potential as an effective and low-cost oil absorbent for applications in large-scale oil-spill clean-ups and recovery.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Hongxia Zhang,Fei Xiao
Enhancing the aqueous reactivity of aluminum-based composites under ambient conditions is crucial for their application as portable, on-demand hydrogen sources in outdoor and emergency settings. This study synthesizes three aluminum composites (Al-Bi-Na 2 SO 3 , Al-Bi-Na 3 PO 4 , and Al-Bi-Na 2 CO 3 ) via mechanical ball milling to systematically evaluate the effect of anion type on the hydrolysis kinetics of aluminum. The microstructural features and hydrogen production performance of these composites are thoroughly examined. Results indicate that ball milling facilitates the uniform dispersion of bismuth and sodium salts over the aluminum particle surfaces. The composites exhibit distinctly different hydrolysis behaviors depending on the anion species. Notably, Al-Bi-Na 2 SO 3 shows the highest reactivity, reaching a maximum hydrogen generation rate of 5.35 mL g −1 s −1 and a total yield of 1019 mL g −1 at 40 °C. Impressively, it sustains rapid hydrogen release even at 0 °C. Real-time monitoring of temperature and pH variations during hydrolysis provides further insight into the reaction dynamics. The excellent performance of Al-Bi-Na 2 SO 3 is due to the key role of SO 3 2− , which enables the formation of soluble Al 2 (SO 3 ) 3 with Al 3+ produced during the reaction, thereby effectively mitigating surface passivation. Moreover, the SO 3 2− /H 2 SO 3 system provides mild buffering capacity that promotes an alkaline shift in the reaction environment, further accelerating aluminum hydrolysis. This study underscores the crucial role of anion selection in sodium salts for tuning the hydrolysis kinetics of aluminum composites, providing a strategic pathway for designing high-performance hydrogen generation systems operable under ambient conditions.
✓ 已验证
DOI
高影响因子
Journal of Fungi
·
2025
·Vol. 11
·期 9
·612
·
IF 4
Mingchen Yang,Yonghua Zhang,Xiaoli Tan,Lu Li,Qiuli OuYang,Nengguo Tao
Green mold formed byPenicillium digitatumis a major disease that limits the yield and overall value of postharvest citrus fruits. The antifungal activity of sodium cuminate (SC) againstP. digitatumand the corresponding mechanism were explored in this research. The minimal inhibitory concentration (MIC) and minimal fungicidal concentration (MFC) of SC againstP. digitatumwere 0.4 and 0.8 g L−1, respectively. SC (8× MFC) reduced the incidence of disease in Ponkan fruits without compromising their quality. The results of CFW staining and extracellular alkaline phosphatase assays revealed that 1/2MIC SC for 30 min had no impact on the cell wall integrity ofP. digitatum. In contrast, 1/2MIC SC apparently destroyed cell membrane integrity, as shown by the increase in the content of reactive oxygen species (ROS), malondialdehyde, and H2O2. The addition of exogenous cysteine (Cys) or diphenyleneiodonium chloride (DPI) significantly mitigated the cytotoxic effects of SC. At the same time, mitochondrial membrane potential was significantly decreased by 1/2MIC SC, and the addition of exogenous Cys or DPI restored it to normal levels. In summary, the antifungal capacity of SC might be attributable to membrane damage inP. digitatumcaused by oxidative stress.
研究领域:
植物病理学
·
微生物学
·
食品科学
·
生物化学
·
采后生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Yibo Gao,Shifang Mu,Yao Li,Lanyun Wang,Yongliang Xu,Kun Zhang
Capture and storage of CO2 (CCS) is recognized as an important, urgent, and necessary option to reduce CO2 emissions from the coal and oil and gas industries and to mitigate the severe impact of CO2 on the atmosphere and the environment. Hydrate-based approach is a new way to solve this challenge, but the challenge is how to synthesize hydrates rapidly and increase their growth rate and storage capacity. In this paper, two additives, 1,3-dioxopentacycline (1,3-DIOX) and sodium lignosulfonate (SL-Na), were selected for experimental studies of CO2 hydrate trapping at different concentration ratios, and the results showed that the two synergistically enhanced the kinetic process of the hydrates under a certain concentration of the compound system. Molecular dynamics simulations showed that the potential energy of the 1,3-DIOX + SL-Na + CO2 + H2O compound system was lower than that of the other systems, suggesting that a more stable CO2 hydrate would be generated within this compound system. The radial distribution function shows that 1,3-DIOX changes the structure of the hydrate, SL-Na enhances the solubilization of CO2 molecules, and the copresence of the two reduces the agglomeration force between CO2 molecules, which facilitates the diffusion of CO2 in the aqueous solution and the confinement of CO2 in the crystalline cages, and thus promotes the growth of the hydrate.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2025
·
IF 5.1
Mi Li,Haorong Cheng,Yang Song,Xinxin Shi,Tongxiang Li,Yan Chen,Zhao Li,Lin Tian
The rapid detection of sulfide compounds including glutathione (GSH) and Na2S2O8 is of great interest because they play an essential role in the process of food processing. Here, we design a colorimetric/smartphone dual-mode sensing platform to detect GSH and Na2S2O8 simultaneously, depending on gold nanoparticle-decorated MnO2 nanosheets (Au/MnO2 NSs). Because of the distinct structure, Au/MnO2 possesses superior catalytic activity similar to native oxidase capable of catalysing the directly oxidation of 3,3’,5,5’-tetramethylbenzidine (TMB) under near-neutral pH conditions. Meanwhile, this catalytic reaction results in an obvious color change or the solution, which senses GSH and Na2S2O8 through redox and diazotization reactions. The designed sensor enables value-assisted and visual determination of GSH and Na2S2O8 with limits of detection of 2.3 nM. Based on the dual-modal sensing system, a smartphone-mediated “all-in-one” sensing platform is designed to realize the real-time and intelligent monitoring of GSH and Na2S2O8. This work provides a new avenue to construct multifunctional sensors to achieve the visualization and portable determination of sulfide compounds.
研究领域:
纳米生物技术
·
分析化学
·
环境监测
·
食品安全
·
分子诊断
·
转化医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Jianing Li,Zheng Zhou,Qi Wu,Zhaofang Liu,Lin Zhu,Shuhong Ye,Yan Ding
Hemerocallis citrina Baroni (HC) is usually soaked with sodium metabisulfite solution after harvest to keep its freshness. However, this will introduce bound sulfites with potential safety risks. In this study, formation pathways of bound sulfite in HC were explored using ultra-high performance liquid chromatography-Q-Exactive HF mass spectrometry (UHPLC-QE-MS) and statistical analysis. The results indicated that the chemical composition of HC changed the most at soaking times of 6–8 h and concentrations of 1.00–2.50 mg/mL. Primary metabolites and phenols in secondary metabolites were greatly affected during soaking. 71 compounds were identified in HC and 8 characteristic markers including 3 bound sulfites were screened which can be used to distinguish between non-soaked HC (NSHC) and sodium metabisulfite-soaked HC (SSHC). Among the 19 commercial HC samples analyzed, 79 % had been treated with sulfites. Mass spectrometry data further revealed two pathways of formation of bound sulfite in HC: one is the sulfonation of amino acids at the amino, the content initially increased with sulfite soaking time and concentration and then decreased until it disappeared; the other is that the addition of aldehyde at the carbonyl, the content increased continuously with sulfite soaking concentration. This study provides insight into bound sulfite formation in HC post‑sodium metabisulfite treatment.
研究领域:
食品科学
·
分析化学
·
植物代谢
✓ 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）