JOURNAL OF APPLIED POLYMER SCIENCE
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2026
·
IF 3.1
Shijie Tang,Sen Wen,Haiyang Feng,Kesan Yang,Haichuan Li,Shenwen Fang
The highly efficient air flotation hydrocyclone separation technology has been gradually promoted and applied. However, the performance of flocculant reported in the literature needs improvement. In this study, a novel flocculant was synthesized using poly[N-(3-dimethylaminopropyl)methacry] (PDPM) and polyether monoamine (PMA) as the main raw materials. The synthesis conditions of the flocculant were optimized based on the oil removal rate. It was found that when PMA M-2095 was used, the resulting product, Cl-0.4-P-0.2-2095, exhibited the best flotation-flocculation oil removal performance. At a dosage of 20 mg/L and a treatment time of 7 min, the oil removal rate of Cl-0.4-P-0.2-2095 reached 90.63%, which was 31.7% higher than that of the reported flocculant. Mechanistic investigations, including measurements of surface tension, interfacial tension, zeta potential, and interfacial elastic modulus, as well as oil-coated bubble experiments, revealed that Cl-0.4-P-0.2-2095 adsorbs onto the surfaces of bubbles and oil droplets. This adsorption enhances the collision and adhesion efficiency between bubbles and oil droplets, thereby improving the flotation-flocculation oil removal performance. This study provides a novel treatment agent for the efficient treatment of produced water from offshore oilfields.
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高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2025
·
IF 4.6
Chuanshun Dai,Lerong Qi,Tingxiang Yang,Zhen Wang,Dong Hao Wang
Sciadonic acid, or 20:3(5Z,11Z,14Z), is an unusual polyunsaturated fatty acid (PUFA) found in certain gymnosperm nuts and marine invertebrates. However, no study has detected it in commonly consumed food items. This study analyzed the fatty acid compositions of fresh, salted, and preserved duck eggs thoroughly via gas chromatography coupled with covalent adduct chemical ionization mass spectrometry (GC/CACI-MS). A multiple reaction monitoring method was developed to specifically characterize three 20:3 isomers found in duck eggs. Sciadonic acid was quantified at 0.13 % and 0.07 % (wt/wt of total fatty acids) in fresh and processed duck eggs, respectively. The major n-3 PUFA is DHA, with average concentrations of 1.44 %, 0.79 %, and 0.98 % in fresh, preserved, and salted duck eggs, respectively. For an average Chinese individual, the daily intake of DHA and total long-chain n-3 PUFA from all types of duck eggs is estimated to be 7.6 mg/day and 10.6 mg/day, respectively.
研究领域:
营养学
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食品科学
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分析化学
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高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2020
·
IF 3.721
Chen Weng,Ze-Yuan Deng,Niu Zhang,Qian Zou,Ya-Wei Fan,Rong Liu,Liu-Feng Zhen,Jing Li
Studies have shown potential beneficial functions of turtle eggs, but the mechanism is not clear. The species and content of lipids have a significant impact on human health. The major lipid classes and fatty acids composition of dried Chinese soft-shell turtle eggs were characterized with the aim of clarifying the potential beneficial functions of turtle eggs from the perspective of lipid nutrition. 100 g dried turtle eggs power contained an average of 24.7 g of triacylglycerol (TAG), 1.24 g of phospholipid (PL) and 0.72 g of cholesterol. The striking feature of the lipid composition was the abundant n-3 polyunsaturated fatty acids, resulting in an excellent n-6/n-3 ratio (1.27) and low atherogenic index (AI) and thrombogenic index (TI) values, which were considered to be a healthier option for the human diet. A total of 85 TAG molecular species and 95 PL molecular species were obtained by lipidomics. ΣcisC18:1, C18:2n-6 and C18:3n-3 were preferentially esterified at sn-2 position of TAG. Phosphatidylcholine (PC) and phosphatidylethanolamine (PE) accounted for more than 90 % of the PL, while no sphingomyelin (SM) was detected. C22:6n-3 and C20:5n-3 were preferentially bound to PE and lysophosphatidylcholine (LPC) respectively.
研究领域:
营养学
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生物化学
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高影响因子
FOOD CHEMISTRY
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2017
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IF 4.529
Dan Xie,Hongyan Mu,Tianpei Tang,Xiaosan Wang,Wei Wei,Jun Jin,Xingguo Wang,Qingzhe Jin
In this study, a three-step extraction method (separately use acetone, hexane, and ethanol as extraction solvent in each step) was conducted to selectively extract three types of krill oils with different compositions. The lipid yields were 5.08% in step 1, 4.80% in step 2, and 9.11% in step 3, with a total of 18.99%. The krill oil extracted with acetone in step 1 (A-KO) contained the lowest contents of phospholipids (PL) (2.32%) and n-3 polyunsaturated fatty acids (PUFA) (16.63%), but the highest levels of minor components (505.00 mg/kg of astaxanthin, 29.39 mg/100 g of tocopherols, 34.32 mg/100 g of vitamin A and 27.95 mg/g of cholesterol). By contrast, despite having traces of minor components, the krill oil extracted using ethanol in step 3 (E-KO) was the most abundant in PL (59.52%) and n-3 PUFA (41.74%). The krill oil extracted using hexane in step 2 (H-KO) expressed medium contents of all the testing indices. The oils showed significant differences in the antioxidant capacity (E-KO > H-KO > A-KO) which exhibited positive correlation with the PL content. These results could be used for further development of a wide range of krill oil products with tailor-made functions.
研究领域:
食品科学
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营养学
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DOI
PubMed
高影响因子
POLYMER SCIENCE SERIES B
·
2020
·Vol. 62
·期 4
·368-374
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IF 0.976
Qian Zhao,Zhan Yi-Kai,Liu Yu-Fei,He Min,Gong Yong-Ji
Abstract Poly( N -(3-carboxyphenyl)maleimide- alt -styrene) with superior heat-resistance was synthesized by free radical copolymerization and its structure was confirmed by FTIR and NMR spectroscopy. To show the advantages in heat-resistance of the synthesized copolymers, the thermal properties of poly( N -phenylmaleimide- alt -styrene) and poly( N -phenylmaleimide- alt -maleic anhydride) with similar structures were determined. DSC/TG analysis showed that the synthesized copolymer exhibited the better thermal properties than two other copolymers due to the formation of a chemically crosslinked three-dimensional network during heating.
研究领域:
高分子化学
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材料科学
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DOI
高影响因子
ELECTROCHIMICA ACTA
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2024
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IF 5.5
Zhefei Zhao,Xuyao Yao,Linlin Zhang,Minhao Chen,Xingyu Luo,Ruopeng Yu,Yinghua Xu,Youqun Chu,Xinbiao Mao,Huajun Zheng
Electrochemical selective dechlorination for the synthesis of high value-added chemical products is an economical and promising technology. Although silver (Ag) electrode is the most representative catalyst in most electrocatalytic dehalogenation reactions, the selectivity for specific reaction needs to be improved. In this framework, AgCu bimetallic electrocatalysts were designed for the selective dechlorination of 4-amino-3,5,6-trichloropyridine carboxylic acid (4-N-3,5,6-TCP) to 4-amino-3,6-dichloropyridolinic acid (4-N-3,6-DCP). The optimum Ag 16 Cu 4 electrode exhibits excellent performance with 99.0% selectivity and 98.8% yield of 4-N-3,6-DCP, surpassing the pure Ag electrode. The combined results of experimental measurements and theoretical calculations indicated that the introduction of Cu modulates the electronic structure of Ag, which not only promoted the transfer of charges, but also reduces the energy barrier of the rate-determining step (the C H formation). In addition, the practicality and scalability of this system was evaluated using a flow-cell reactor. This study demonstrates that AgCu bimetallic catalyst plays a crucial role in determining the selectivity and activity in the electrochemical dechlorination of 4-N-3,5,6-TCP and displays the prospective applications.
研究领域:
环境科学
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材料科学
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电化学工程
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高影响因子
Nutrition & Food Science
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2025
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IF 1.6
Ye Yue,Huasong Bai,Tong Liu,Shang Jia,Xiaohong Kou,Zhanzhong Wang
Purpose This study aims to investigate the impact of the compositions and concentrations of α -linolenic acid (ALA), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), which are significant n-3 polyunsaturated fatty acids (n-3 PUFAs), on the anti-inflammatory properties of lipopolysaccharide (LPS)-stimulated mouse hepatocytes. Design/methodology/approach A mouse hepatocyte inflammation model was established using LPS to evaluate the anti-inflammatory effects of a combination therapy with EPA, ALA and DHA. Interleukin-10 (IL-10), lipoxin A4 (LXA4) and tumor necrosis factor-α(TNF- α ) were measured to evaluate the anti-inflammatory ability of hepatocytes. The compositions and concentrations of EPA, ALA and DHA were optimized by response surface methodology to obtain the best anti-inflammatory effect. Findings The optimal inflammatory model was established with 10 µg/mL LPS treatment for 24 h. Maximal cell viability was found at EPA concentration of 150 µM, ALA concentration of 400 µM and DHA concentration of 600 µM. The optimal concentrations of n-3 PUFAs for anti-inflammatory activity in mouse hepatocytes were obtained through single-factor experiments and response surface analysis, with EPA 141.41 µM, ALA 405.45 µM and DHA 551.76 µM. Under optimized conditions, the experimental results for TNF- α , IL-10 and LXA4 levels were close to the theoretical prediction, indicating that the mathematical model was extremely accurate and versatile. Originality/value This study systematically explored the specific effects of different ratios and concentrations of ALA, EPA and DHA on the anti-inflammatory ability of mouse hepatocytes, offering an experimental foundation for the advancement of novel anti-inflammatory medicines and nutritional supplements.
研究领域:
营养学
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免疫学
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药理学
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2020
·Vol. 137
·期 47
·49559
·
IF 2.52
Yifan Wang,Ming Duan,Xiujun Wang,Bo Jing,Fei Wang,Yan Xiong,Shenwen Fang
Gas flotation is one of the important technologies for oily wastewater treatment and the surface-active polymer is an important kind of developing flotation agents. In this article, the flotation performance, polymerization kinetics, and copolymerization behavior of surface-active copolymer of N -[3-(dimethylamino) propyl] methacrylamide (DMAPMA) and dodecyl dimethyl propenyl ammonium chloride (C 12 DM) and copolymer of DMAPMA and decyl dimethyl vinylbenzyl ammonium chloride(C 10 MVBA) were investigated. The flotation experiment showed that both copolymers had an oil removal of 97% at the concentration of 30 mg/L. The result of polymerization kinetics showed that the polymerization initiation rate was influenced by the monomer concentration and the polymerization termination was dominated by bimolecular termination and accompanied by unimolecular termination. The activation energy of DMAPMA-C 12 DM copolymerization (89.64 kJ/mol) was smaller than that of DMAPMA-C 10 MVBA (91.65 kJ/mol) copolymerization. The reactivity ratios of DMAPMA and C 12 DM were 0.46 and 15.52, respectively, as well as the reactivity ratios of DMAPMA and C 10 MVBA were 1.19 and 35.77, respectively. These results are meaningful for the oily wastewater flotation and the copolymerization mechanism of DMAPMA-based copolymer.
研究领域:
环境科学
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高分子化学
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高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2024
·
IF 6
Youyou Yang,Dapeng Liu,Weihai Xing,Chaohua Tang,Xiaohui Feng,Junmin Zhang
Lipid autoxidation is one of the main pathways for the formation of volatiles in meat. Investigations into how the unsaturated fatty acid (UFA) chains in lipids are autoxidized into volatiles are of great importance and could facilitate aroma research. In this study, taking UFAs as the research model, understanding of the formation of volatiles from the UFAs’ autoxidation has been updated and new pathways for furaldehyde derivatives have been proposed. The types of volatile produced were determined by the position and the number of C=C bonds as well as the methylene group flanked by the C=C bond. When the number of carbon atoms adjacent to C=C increases, the carbon lengths of aliphatic aldehydes elongate. Additionally, the number of methylene groups flanked by the C=C bond in PUFAs determine the types of aldehydes, alkanals, alkenals or alkadienals, as well as ketones. Apart from the alkyl furans, also furaldehydes and other derivatives could be produced from the oxidation of n-3 and n-6 fatty acids with over two C=C bonds, instead of from the Maillard reaction. This study presents the direct proof of the correlation between fatty acids and volatiles, and could also provide the theoretical basis for elevating aroma through lipid regulation.
研究领域:
食品科学
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生物化学
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DOI
高影响因子
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
·
2025
·
IF 3.5
Boruo Yang,Mei Lan,Jin Liu,XuanYi Liu,Weihao Xiong,Luan Lin,Min Zhang,Peng Liang
BACKGROUND Triglyceride-type n-3 polyunsaturated fatty acids (n-3 PUFAs) are often used to improve the quality of meat products, while the potential of phospholipid-type n-3 PUFAs remains underexplored. This study evaluated the gel and flavor quality of minced pork gel (MPG) with marine-sourced large yellow croaker roe phospholipids (LYPLs) as phospholipid-type n-3 PUFA supplements. RESULTS The addition of LYPLs increased the n-3 PUFA content in MPG and caused no visually significant color changes. Textural properties, water-holding capacity and binding water percentage increased with the incorporation of LYPLs, with the best MPG quality obtained at 1.6% LYPLs. The addition of LYPLs enriched flavor compounds such as aldehydes, ketones and alcohols in MPG while enhancing the perception of saltiness and freshness of MPG. CONCLUSION LYPLs can be successfully applied as a potential n-3 PUFA supplementation in gel-form meat products and subsequently improve their quality and flavor attributes. This study informs using LYPLs as phospholipid-type n-3 PUFA supplements in meat products. © 2025 Society of Chemical Industry.
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2014
·
IF 2.045
Kelei Zhuo,Hao Ren,Yujing Wei,Yujuan Chen,Jingjing Ma
Activity coefficients of the 1-alkyl-3-methylimidazolium bromide [Cnmim]Br (n = 3 to 8) ionic liquids (ILs) in fructose + water mixed solvents at 298.15 K were determined by cell potential measurements. The molalities of [Cnmim]Br ranged from (0.005 to 0.1) mol·kg–1 and those of fructose from (0.2 to 0.8) mol·kg–1. Gibbs free energy interaction parameters were also obtained together with salt constants. The interactions between [Cnmim]Br and fructose are mainly controlled by electrostatic interactions. Gibbs free energy interaction parameters (gES) and salting constants (kS) are negative for the ILs (n = 3 to 6), indicating fructose are salted-in by the ILs in water, whereas fructose are salted-out by the ILs (n = 7 and 8).
研究领域:
化学
·
物理化学
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高影响因子
BIOORGANIC & MEDICINAL CHEMISTRY
·
2016
·
IF 2.923
Honglei Xie,Yiqun Li,Changlin Bai,Ruifeng Wang,Chunchi Liu,Chenzhou Hao,Bin Lin,Maosheng Cheng,Dongmei Zhao
Epidemiological studies have identified that the risk of cardiovascular events increases due to the decreased levels of high density lipoprotein-cholesterol and the elevated levels of low density lipoprotein-cholesterol. Herein, we report a novel series of N , N -3-phenyl-3-benzylaminopropionanilide derivatives, which were identified as potent cholesteryl ester transfer protein (CETP) inhibitor. The initial lead compound L10 (IC 50 8.06 μM) was found by pharmacophore-based virtual screening (Dong-Mei Zhao et al., Chin. Chem. Lett. 2014 , 25 , 299). After systematic structure variation and biological testing against CETP, two different series were identified as scaffolds for potent CETP inhibitors. One is N , N -3-phenyl-3-benzylaminopropanamide derivatives, which were investigated in our previous paper ( Bioorg. Med. Chem. 2015 , doi: http://dx.doi.org/10.1016/j.bmc.2015.12.010 ). The most potent compound HL16 in that series has the IC 50 of 0.69 μM. The other series is N , N -3-phenyl-3-benzylaminopropionanilide derivatives, which was investigated in current study. Further optimization of the structure–activity relationship (SAR) resulted in H16 (IC 50 0.15 μM), which was discovered as a potent CETP inhibitor in vitro by BODIPY-CE fluorescence assay . In addition, the results of pharmacodynamics studies showed that H16 exhibited both favorable HDL-C enhancement and LDL-C reduction in vivo by hamster. It also has an excellent stability in rat liver microsomal.
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PubMed
高影响因子
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