Silicon
·
2019
·Vol. 12
·期 2
·327-338
·
IF 1.21
Wei Mengnan,Ban Boyuan,Li Jingwei,Sun Jifei,Li Feifei,Jiang Xuesong,Chen Jian
A novel green cationic surfactant Poly (propylene glycol) bis (2-aminopropyl ether) (PEA) with multiple amine groups was utilized as a collector for flotation separation of quartz from feldspar-quartz associated ore (FQA) without acid (particularly, HF) and alkali. The collecting performances and the adsorption mechanisms of PEA on the quartz/FQA were investigated through flotation experiments, ICP-OES, XRD, Zeta potential, FTIR and XPS measurements. A remarkable separation of the quartz from FQA has been realized in an environmental friendly way. The froth flotation results show that the flotation recovery of quartz is 97.79% and that of FQA is 19.30% at pH 9.00–9.50 with 10 −4 M PEA when the particle size ranges from 150 to 270 μm. The results of batch flotation, ICP-OES and XRD analyses show that the first flotation product is almost quartz, while more feldspar and little quartz exist in the sink product when compared with the FQA feed. The mechanism of PEA acting as the collector for the separation of quartz/feldspar has been investigated. The PEA is adsorbed on the quartz surface by electrostatic and hydrogen bonding interaction with ─NH 3 + /─NH 2 head groups, while is less adsorbed on the feldspar surface due to electrostatic repulsion between the K + / Na + ions and the positively charged ─NH 3 + /─NH 2 head groups of PEA. A conceptual adsorption model of the PEA cationic collector on the quartz and the FQA surfaces has been proposed.
研究领域:
矿物加工工程
·
环境科学
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产品关联
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Jiacong Wu,Shiyuan Liu,Xinnan Ma,Cailiang Zhang,Chengxiang Feng,Lei Wang,Juan Han,Yun Wang
The current study presents a scalable approach for the preparation of temperature-responsive PEG/SiO2/PNIPAM-PEA Janus particles and, for the first time, investigates their potential applications in stabilizing foam and defoaming by adjusting the temperature. The method utilizes a (W1 + O)/W2 emulsion system, which incorporates appropriate surfactants to stabilize the emulsion and prevent rapid dissolution of the hydrophilic triblock polymer PEG-b-PTEPM-b-PNIPAM in water. The PEG/SiO2/PNIPAM-PEA Janus particles with temperature-responsive characteristics were synthesized in a single step that combined the sol–gel reaction and photoinduced free radical polymerization. The contact angle of the hydrophilic PEG/SiO2/PNIPAM surface was measured to be 54.7 ± 0.1°, while the contact angle of the hydrophobic PEA surface was found to be 122.4 ± 0.1°. By incorporating PEG/SiO2/PNIPAM-PEA Janus particles at a temperature of 25 °C, the foam’s half-life is significantly prolonged from 42 s to nearly 30 min. However, with an increase in temperature to 50 °C, the foam’s half-life rapidly diminished to only 44 s. This innovative application effectively enhances foam stabilization at low temperatures and facilitates the rapid dissipation of foam at high temperatures.
研究领域:
材料科学
·
化学工程
·
胶体与表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Wanting Li,Shiqi Wei,Duankai Wu,Peng Zhang,Guoliang Chen,Binbin Luo,Xiongling Yu,Zhenyu Huang,Feiming Li
2D/3D multidimensional perovskite heterostructures have attracted considerable attention due to their inherent stability and efficient charge transport. However, many challenges remain in fabricating stable 2D/3D multidimensional perovskite heterostructures, such as a precise and convenient pathway to control the perovskite phase with stable interfacial interactions between the 2D and 3D perovskite layers. Therefore, developing a convenient method for the construction of 2D/3D perovskite heterostructures is highly necessary. In this study, we have successfully synthesized stable 2D/3D multidimensional (PEA)2PbBr4 perovskite heterostructures by precisely modulating post cation exchange with cesium oleate (CsOA). As CsOA increased, 2D (PEA)2PbBr4 nanosheets gradually transformed into 3D CsPbBr3, resulting in a multidimensional 2D/3D heterostructure with vivid multi-emission changes. Taking advantage of this precise control process, we explored their potential application in the fluorescent colorimetric detection of Cs+ in soybean oil based on multidimension transformation of 2D (PEA)2PbBr4 nanosheets. This novel strategy not only provides a new approach to constructing 2D/3D perovskite heterostructures but also expands the visual detection strategies for Cs+ sensing.
研究领域:
材料科学
·
纳米技术
·
分析化学
·
光电
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Qiufeng Song,Weiliang Guan,Changqing Wei,Wenyu Liu,Luyun Cai
Pea protein isolates (PPI)/phlorotannins (PT)/chitosan (CS) ternary complex and PPI/CS binary complex were synthesized to prepare tomato seed oil (TSO) microcapsules. The concentration of PT was determined to be 0.025% (w/w) based on the solubility, emulsification, and UV–visible spectrum of PPI-PT complex. Subsequently, the optimal pHs associated with the formation of PPI/CS and PPI-PT/CS complex coacervates were determined to be pH 6.6 and 6.1, while the optimal ratios were 9:1 and 6:1, respectively. The coacervate microcapsules were successfully produced by freeze-dried method and those formulated with PPI-PT/CS displayed significantly lower surface oil content (14.57 ± 0.22%), higher encapsulation efficiency (70.54 ± 0.13%), lower particle size (5.97 ± 0.16 μm), and PDI (0.25 ± 0.02) than PPI/CS. The microcapsules were characterized by scanning electron microscopy and Fourier Transform infrared spectroscopy. Furthermore, the encapsulated TSO exhibited enhanced thermal and oxidative stability than that of free oil, along with microcapsules fabricated with PPI-PT/CS ternary complex showed better protection than that of free PT. Overall, PPI-PT/CS complex as an effective wall material in delivery system presented great potential.
研究领域:
食品科学
·
生物化学
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产品关联
DOI
PubMed
高影响因子
ACS Energy Letters
·
2021
·
IF 23.101
Lvpeng Yang,Yun Zhang,Junming Ma,Ping Chen,Yu Yu,Ming Shao
Efficient and spectrally stable pure-red perovskite light-emitting diodes (PeLEDs) are still rare and urgently needed for high-definition display. The traditional color tuning method by varying halide composition undergoes phase segregation and has spectral instability issues. Instead of halide mixing, we fabricate pure-red PeLEDs based on quasi-two-dimensional (quasi-2D) perovskites by simultaneously incorporating phenethylammonium (PEA) and 1-naphthylmethylammonium (NMA) cations. The control of PEA and NMA cospacer ratio modulates the phase distribution and the resulting different color emission. The PeLEDs with PEA:NMA molar ratio of 5:5 exhibit a pure-red (635 nm) electroluminescence (EL) with a CIE coordinate (0.709, 0.285) approaching the Rec. 2020 specification. Meanwhile, the optimized devices exhibit an external quantum efficiency (EQE) of 12.41% and a maximum brightness of 1452.6 cd m–2, which are among the best-performing pure-red PeLEDs based on quasi-2D perovskite to date. Additionally, our PeLEDs demonstrate stable EL spectra under different operating voltages and continuous operation.
研究领域:
材料科学
·
光电技术
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2014
·
IF 3.259
Yansong Li,Shiying Lu,Zengshan Liu,Lihui Sun,Junfei Guo,Pan Hu,Junhui Zhang,Yuanyuan Zhang,Yang Wang,Honglin Ren,Xingyu Meng,Yu Zhou
Phenylethanolamine A (PEA) is a phenethanolamine member of the family of β-adrenergic agonists compounds illegally used as feed additives for growth promotion. In this study, PEA was covalently linked to carrier protein cationized bovine serum albumin (cBSA) and egg albumin (OVA). A monoclonal antibody specific for PEA was produced and characteristics of monoclonal antibody (McAb) were studied. Based on the McAb, an enzyme-linked immunosorbent assay (ELISA) for detection of PEA was developed, which showed an IC 50 value of 6.25 ng mL −1 and a detection limit of 0.19 ng mL −1 . The average recovery of PEA from spiked samples was 103.4%, which demonstrated that the matrices of meat where PEA may be found do not interfere with the assay.
研究领域:
兽医学
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分析化学
·
食品安全
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF DAIRY SCIENCE
·
2023
·
IF 3.5
Ru Zhao,Wenfei Fu,Dan Li,Chao Dong,Zhaoxue Bao,Cuina Wang
ABSTRACT Three modifications (pH-shift, ultrasound, combined pH-shift/ultrasound) induced alterations in pure whey protein (WPI), pea protein (PPI), and mixed whey/pea protein (WPI/PPI) were investigated. The processing effect was related to the protein type and technique utilized. Solubility of WPI remained unchanged by various treatments. Particle size was enlarged by pH-shift while reduced by ultrasound and combined approach. All methods exposed more surface hydrophobic groups on WPI, while pH-shift and joint processing was detrimental to its emulsifying activity. PPI and mixture exhibited similar responses toward the modifications. Solubility of PPI and the blend enhanced in the sequence of pH-shift/ultrasound > ultrasound > pH-shift. Individual approach expanded while co-handling diminished the particle diameter. Treatments also caused more disclosure of hydrophobic regions in PPI and WPI/PPI and emulsifying activity was ameliorated in the order of pH-shift/ultrasound > ultrasound > pH-shift.
研究领域:
食品科学
·
蛋白质化学
·
超声波技术
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产品关联
DOI
PubMed
高影响因子
PHARMACOLOGICAL RESEARCH
·
2022
·
IF 10.334
Yuhang Li,Yitian Li,Sennan Xu,Yue Chen,Pan Zhou,Ting Hu,Hua Li,Ying Liu,Yaping Xu,Jie Ren,Yan Qiu,Canzhong Lu
Psoriasis is an incurable autoimmune disease that affects 2–3% of the world’s population. Limited understanding of its pathogenesis hinders the development of therapies for the disease. Herein, we reported that N-acylethanolamine acid amidase (NAAA), a cysteine enzyme that catalyzes the hydrolysis of fatty acid ethanolamides (FAEs), was upregulated in psoriasis patients and imiquimod (IMQ)-induced mouse model of psoriasis. The upregulated NAAA contributes to the progression of psoriasis via enhancing dendritic cell (DCs) maturation. Transgenic expression of NAAA in mice accelerated the development of psoriasis, whereas genetic ablation of NAAA or local administration of NAAA inhibitor F96 ameliorated psoriasis. NAAA expressed in dendritic cells (DCs), but not in macrophages, T cells, or keratinocytes plays a critical role in psoriasis development. In addition, the results showed that NAAA degrades palmitoylethanolamide (PEA) and reduces PEA-PPARα-mediated dissociation of NF-κB p65 from Sirtuin 1 (SIRT1), subsequently, repressing the acetylation of p65 and down-regulating IL10 production. The decreased IL10 then leads to the maturation of DCs, thus promoting the development of psoriasis. These results provide new insights into the pathophysiological mechanism of psoriasis and identify NAAA as a novel target for the treatment of psoriasis.
研究领域:
免疫学
·
皮肤病学
·
药理学
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产品关联
DOI
PubMed
高影响因子
Materials
·
2022
·Vol. 15
·期 6
·2327
·
IF 3.748
Zuolong Yu,Deping Gong,Chao Han,Yunxiao Wei,Changchun Fu,Xuejiao Xu,Youri Lu
The composite films comprising pea starch (St) and ε-polylysine (PL) as the matrix and glycerol and sodium alginate as the plasticizers were investigated. The rheological properties, mechanical properties, Fourier transformed infrared spectroscopy, water vapor permeability (WVP), oil permeability, microstructure, thermogravimetry (TGA), and antimicrobial properties of the composite films were analyzed. The properties of the composite films with different mass ratios of St/PL varied significantly. First, the five film solutions were different pseudoplastic fluids. Additionally, as the mass ratio of PL increased, the tensile strength of the blends decreased from 9.49 to 0.14 MPa, the fracture elongation increased from 38.41 to 174.03%, the WVP increased, and the oil resistance decreased substantially. The films with a broad range of St/PL ratios were highly soluble; however, the solubility of the film with a St/PL ratio of 2:8 was reduced. Lastly, the inhibition ofE. coli,B.subtilis, and yeast by the films increased with increasing mass ratios of PL, and the inhibition ofB.subtiliswas the strongest.Keywords:pea starch;ε-poly lysine;composite film;antibacterial;properties
研究领域:
食品科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Min Fu,Qin Geng,Jun Chen,Xiaohong He,Xuemei He,Ti Li,Chengmei Liu,Taotao Dai
Quercetin (Qu), Quercitrin (Que) and Rutin (Ru) were advisedly selected to explore the interaction of flavonoids with pea protein (PP) by spectral analysis and molecular simulation. The order of binding affinity at 298 K for the flavonoids with PP was Qu (2.26 × 10 5 M −1 ) > Ru (8.23 × 10 4 M −1 ) > Que (7.93 × 10 4 M −1 ), introducing one or two glycosides weakened the affinity. Thermodynamic analysis indicated that the dominant interaction of flavonoids with PP were hydrogen bond and Van der Waals force, which supported by the results of molecular docking simulations. Moreover, decreased surface hydrophobicity and the changed of circular dichroism showed that the conformation of PP became looser with the addition of flavonoids, then the surface tension was decreased, foaming and emulsifying properties of PP were improved. This result may be beneficial to the application of natural flavonoid nutraceuticals and improvement of protein-based food quality properties.
研究领域:
食品科学
·
分子生物学
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产品关联
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2021
·
IF 9.147
Xingfei Li,Shunuan Yang,Cheng Lu,Jie Long,Xiangzhen Kong,Yufei Hua
Selective complexation with anionic polysaccharides (sulfated (SPS) and carboxylated polysaccharides (CPS)) was used to purify a target protein, pea albumin 1a (PA1a), a sulfur rich protein, from PA1a/pea albumin 2 (PA2) mixtures (PPM, two main pea albumins). The results showed that PPM-SPS system had higher critical pH c and protein recovery than that of PPM-CPS. The binding affinity of PA2 with CPS or SPS was stronger than that of PA1a, which led to the preferential complexation of PA2 and the enrichment of single PA1a in the supernatant. The high charge densities of dextran sulfate, κ-carrageenan and sodium alginate were unfavorable to the isolation of PA1a, and the highest PA1a recovery was obtained for PPM-carboxymethyl cellulose system, although it had the lowest charge density. After removal of polysaccharides by ultrafiltration in non-interacting pH conditions, a purified PA1a (>90% by SEC-HPLC) was obtained. This work provides a novel strategy for the purification of PA1a from multi-proteins system based on selective complexation.
研究领域:
食品科学
·
生物化学
✓ 已验证
DOI
高影响因子
Food & Function
·
2023
·Vol. 14
·期 9
·4339-4353
·
IF 6.1
Jiaxing Xie,Weijuan Huang,Xuehui Wu
Plant proteins are becoming increasingly important for foam formation as an alternative to animal proteins. Consumers, however, are unsatisfied with the foaming properties of pea protein isolates. Recent research on proteins and surfactants has primarily concentrated on chemically synthesized surfactants. In this study, foams were prepared by complexing pea protein isolates with a natural small molecule surfactant tea saponin. This study investigates the mechanisms responsible for the formation and stability of foams prepared from pea protein isolates (PPIs) complexed with tea saponins. Analyses of foaming performance were carried out by analyzing the morphology of foam, foaming properties, foam's rheological properties, and the microstructure of the pea protein-tea saponin complex system. Compared to the pea protein isolate alone, the pea protein-tea saponin complex significantly improved foaming capacity and foaming stability. As shown by light microscopy analysis, the size of the foam decreased and became more homogeneous, probably because of the altered aggregate state of the protein. In this study, natural surfactants and mixtures of plant proteins are studied in order to better understand their properties. The mixed system has excellent prospects for application in the industries related to foam.
研究领域:
食品科学
·
胶体与表面化学
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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）