MINERALS ENGINEERING
·
2021
·
IF 4.765
Kai Jia,Yuxia Yi,Wuju Ma,Yijun Cao,Guosheng Li,Shiqiang Liu,Taojin Wang,Nan An
Ion flotation was used to remove copper(II), lead(II) and chromium(III) from simulated wastewater using a new biodegradable biosurfactants, namely, sodium N-lauroylsarcosinate (LS), and the synthetic surfactant sodium dodecyl sulfate (SDS) as collectors. The use of LS resulted in better removal of metal ions than that achieved with SDS. It was found that the removal efficiency of single metal ions can reach more than 95%. The results showed that the complex formed by surfactant and metal ion was flocculent and loose in structure, which may be the main reason for the slow ion flotation speed. XPS and IR analysis showed that there was a complex reaction between the sulfonic group of SDS and the carboxyl group of LS with metal ions. These findings indicate that the new biosurfactant LS has a better treatment effect on wastewater containing heavy metal ions and compared with industrial surfactants (such as SDS), LS is degradable and environmentally friendly, potentially leading to better industrial application. DFT theory further confirmed the experimental results. The calculated results show that LS has higher complexation ability for Pb(II) than dose SDS. LS reacts with Pb to form a four-membered ring complex containing two O atoms, which has higher stability than the complex containing SDS.
研究领域:
环境科学
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化学工程
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材料科学
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DOI
高影响因子
ELECTROPHORESIS
·
2016
·Vol. 37
·期 14
·2097-2105
·
IF 2.482
Ya-Jun Duan,Li-Yun Zhang,Xiao-Feng Guo,Hong Wang
A rapid and robust CE method using a long wavelength fluorescent reagent 1,7-dimethyl-3,5-distyryl-8-phenyl-(2-maleimide)difluoroboradiaza- s -indacene as the labeling reagent has been developed for the simultaneous determination of thiols, including glutathione, cysteine, homocysteine, N -acetylcysteine, cysteinylglycine, and penicillamine. The derivatization reaction was carried out in 14 mmol/L pH 8.5 borate buffer at 30°C for 6 min and the labeled thiols derivatives were separated with the running buffer containing 30 mmol/L pH 7.4 phosphate, 30% v/v acetonitrile and 8 mmol/L SDS within 12 min. Detection limits ranged from 0.4 to 2.4 nmol/L. To demonstrate the capability of this method, it was applied to the analysis of thiols in human urine with recoveries of 92.4–105.6%. The derivatization reaction was much faster at milder conditions, and the analysis was rapider. Moreover, with excitation wavelength at long wavelength region, background interference from samples was reduced effectively. The present method seems to be a potential choice for quantifying thiols in human urine.
研究领域:
分析化学
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生物化学
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DOI
PubMed
高影响因子
Chemosensors
·
2024
·Vol. 12
·期 8
·166
·
IF 3.7
Xiangfang Lin,Qinhui Dong,Yalin Chang,Shusheng Zhang,Pengfei Shi
Luminescent Ag nanoclusters (Ag NCs) are a promising probe material for sensing and bioimaging applications. However, the intrinsic obstacle of poor water stability and photostability greatly restrict their practical application in biological systems. Herein, we report the intracellular hypochlorite (ClO−) detection with amphiphilic copolymer-modified luminescent Ag NCs with good biocompatibility and photostability. The Ag NCs were synthesized by using chemically inert hydrophobic ligands and then modified with an amphiphilic (1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[methoxy(poly(ethylene glycol))-2000]) (DSPE-PEG-2000) and sodium dodecyl sulfonate (SDS) for phase transfer. It was found that the approach of the removal of organic solvents during the phase transfer has remarkable influences on the properties of the Ag NCs, including their size, luminescence property, and aqueous stability. Furthermore, the silver core of Ag NCs could be oxidatively damaged by ClO−, thereby causing photoluminescence (PL) quenching. The ClO−-induced PL quenching was specific over the other common reactive oxygen species (ROS) as well as some common interferences. Finally, they have been successfully applied as a fluorescent nanoprobe for detecting exogenous and endogenous ClO−in living cells.
研究领域:
纳米技术
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分析化学
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生物化学
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材料科学
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生物传感
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DOI
高影响因子
Geoenergy Science and Engineering
·
2025
·
IF 4.6
Ou Jiang,Xiuhua Zheng,Pei Wu,Luyao Ma,Xu Liu,Pengfei Jin,Pengxiang Zhang,Yang Yang,Haoyu Yu
Acidizing improves reservoir productivity, and foam acid fluid systems achieve both effective acidizing and reservoir protection compared to conventionally utilized acid fluids. Nevertheless, the current application of foam acid fluids is restricted to oil-gas reservoir stimulation, owing to the differences in development conditions between oil-gas and geothermal reservoirs. The transformative application of foam acid fluids from oil-gas to geothermal reservoirs can address the problems induced by conventional acid fluids in geothermal reservoirs, such as limited effective acidizing distance and difficulties in flowing back residual fluids. Here, a foam acid fluid system with typical foaming agents, including sodium dodecyl sulfate (SDS), cocoamidopropyl betaine (CAPB), dodecyl trimethyl ammonium bromide (DTAB) and decaethylene glycol monododecyl ether (DGME), with various foam stabilizer xanthan (XC) contents (0.3%−1.2%) is proposed. Its feasibility in low-temperature (25°C−90°C) geothermal reservoir stimulation is verified through foam stability and acidizing effects, containing dissolution and corrosion inhibition performances. The results shows that the foam acid fluids with DTAB and DGME at 1.2% XC have a required foam stability. A network micro-structure of foam stabilizers, the stronger intermolecular forces in the foaming system, and the chemical reaction stability of foaming agents, mutually contribute to the foam stability. Compared to non-foam acid fluids, foam acid fluids significantly retards acid-rock reaction, with a more uniform dissolution of the cuttings microscopically. The existence of bromide ion (Br – ) in DTAB enhances the corrosion of N80 steel, which is above an accepted corrosion speed. This study highlights the great application potential of foam acid fluid system in an efficient stimulation of low-temperature dolomite geothermal reservoirs.
研究领域:
地热能
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石油工程
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储层改造
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胶体与界面科学
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化学工程
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 47
·27156-27163
·
IF 10.733
Weifeng Zhang,Ruixiang Qu,Xiangyu Li,Yanan Liu,Yen Wei,Lin Feng
In the oil/water emulsion treatment field, the separation of dispersed tiny oil droplets and the removal of surfactants are both significant in order to obtain purified water. Superwetting materials have proved to be an ideal solution for stabilized emulsion separation. However, most of the previous studies only focus on the separation of oil from water while neglecting the removal of surfactants. With the purpose of realizing in situ emulsion separation and surfactant removal, a dual functional Janus membrane is designed inspired by mussel-inspired chemistry and an EDC/NHS coupling reaction. After modification, abundant amino groups and carboxyl groups are decorated on two sides of the microfiltration membrane substrate, respectively (denoted as the –NH2 side and –COOH side). Combining special wettability with electrostatic interaction, the as-prepared membrane is able to separate stabilized oil-in-water emulsions and remove anionic/cationic surfactants simultaneously. The –NH2 side is used for the treatment of anionic emulsions with the surfactant sodium dodecyl sulfate (SDS), while the –COOH side is used for the treatment of cationic emulsions with the surfactant hexadecyl trimethyl ammonium bromide (CTAB). More importantly, the separation efficiencies are all above 99.5% and the surfactant removal efficiencies are up to 95.7%. To our knowledge, this is the first time to treat both dispersed oil droplets and surfactants using superwetting materials. The excellent recyclability and stability of the Janus material make it a potential candidate for application in the industrial field.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Yimei Zheng,Yu Chang,Biying Luo,Hui Teng,Lei Chen
Ovalbumin (OVA) is a high nutritious protein, but the poor emulsibility limited its application. The present study glycosylated OVA with dextran (Dex) by controlled wetheating (60–90 °C for 3 h). Temperature was an inductive factor for glycosylation degree (DG and browning intensity), and higher temperature could accelerate the reaction. Variations in molecular structure of OVA were analyzed by SDS-PAGE, FTIR, fluorescence spectroscopy and UV spectroscopy, which verified successes in the generation of glycoconjugate with more flexible structure. Emulsifying activity index (EAI) and emulsion stability index (ESI) for the emulsion of OVA-Dex glycoconjugates were significantly enhanced with the increasing of glycosylation temperature. Moreover, confocal laser scanning results revealed that the emulsion exhibited smaller size and more uniform distribution, and slower transmission profiles were checked by LUMiSizer centrifugal analysis as well, confirming the emulsibility improvement of OVA. Thus, controlled glycosylation reaction is an available method to improve the emulsifying properties of OVA.
研究领域:
食品科学
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化学工程
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生物化学
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产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Qiuhua Xie,Zhihua Zhang,Na Li,Li Cui,Ping Wang,Yuanyuan Yu,Qiang Wang
In this study, transglutaminase-mediated alkylation modification of zein with octadecylamine (OA) was carried out to enhance the hydrophobicity of zein and the potential application of modified zein in the functionalization of textiles was evaluated. The reaction between OA and zein was demonstrated from the results of sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE), Fourier transform infrared (FTIR) and 1 H nuclear magnetic resonance ( 1 H MIR). The hydrophobicity of zein significantly increased and the secondary structure of zein slightly changed after alkylation modification. The alkylated zein imparted excellent hydrophobic function to cotton textiles with a water contact angle (WCA) value of 131.7° and the hydrophobicity was long-lasting. Scanning electron microscope (SEM) showed a coarse surface formed on cotton fabric due to the participation of OA. The hydrophobic functionalization of the cotton fabric with alkylated zein did not cause negative impact on the mechanical properties and air permeability of the fabric.
研究领域:
材料科学
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纺织工程
·
化学
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Ting Qi,Xiaona Wei,Xianfu Chen,Tiandan Lu,Dongliang Jin,Jing Zhong
Nanofiltration (NF) membranes are emerging as promising candidates for lithium extraction. However, their performance is challenged by the comparable physicochemical characteristics of Li + and Mg 2+ . In this work, a dual-reinforcement strategy is proposed to simultaneously enhance both selectivity and permeability by combining the densification of the polyamide (PA) network and the construction of Li + -selective transport channels. During the interfacial polymerization of piperazine (PIP) and trimesoyl chloride (TMC), the cross-linking density of the PA layer is increased by adding sodium dodecyl sulfate (SDS), while Li + -selective transport nanochannels are constructed by incorporating 15-crown-5 ether (CE). This synergistic modification enhances Mg 2+ rejection via intensified size exclusion and facilitates Li + permeation through ion-specific recognition. The resulting PIP/SDS/CE-PA membrane exhibits a high cross-linking degree of 91.26 %, a reduced pore size of 0.70 nm, and a narrow pore size distribution (σ = 1.22). Molecular dynamics simulations confirm the preferential complexation of CE with Li + , and that Li + exhibits faster and more favourable translocation in the PIP/SDS/CE-PA membranes, thereby facilitating its selective transport. Experimentally, the membrane achieves a high MgCl 2 rejection of 97.1 % and a low LiCl rejection of 56.7 %, yielding an exceptional Li + /Mg 2+ selectivity of 30 in a MgCl 2 /LiCl binary system, while maintaining a water permeance of 5 L m −2 h −1 bar −1 . These findings demonstrate the strong potential of the PIP/SDS/CE-PA membrane for the direct treatment of high Mg 2+ /Li + ratio salt-lake brines and offer a versatile strategy for designing next-generation NF membranes for selective ion separations.
研究领域:
材料科学
·
膜技术
·
分离科学
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环境工程
·
能源材料
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产品关联
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2025
·
IF 6.6
Jiagang Guo,Yuhan Wu,Siyu Sun,Qian Zhu,Jingjing Du,Jiayu Gu,Song Yang,Jian Jiang
This study aims to evaluate the physicochemical, functional, and antioxidant properties of bamboo shoot protein (BSP) produced by alkali isoelectric precipitation and ultrasound- and enzyme-assisted alkali extraction methods. The extraction method significantly affected the properties of BSP. Both ultrasound- and enzyme-assisted extractions resulted in higher protein recovery yield and purity compared to alkali isoelectric precipitation. SDS-PAGE results indicated that BSP exhibited low molecular weight (12–65 kDa). However, ultrasonication and enzymatic digestion disrupted the secondary and tertiary structures of proteins, leading to smaller particle sizes and higher levels of β-turn and random coil content. In this study, BSP isolated using enzymatic-assisted alkali extraction (E-BSP) showed the highest solubility, foaming stability, emulsion activity index, water-holding capacity, and fat absorption capacity. Moreover, E-BSP exhibited the lowest IC 50 values for scavenging hydroxyl radicals (2.90 mg/mL) and ABTS + radicals (0.39 mg/mL). These findings provide a basis for the high-value utilization of bamboo shoots in the food industry.
研究领域:
食品科学
·
蛋白质化学
·
功能食品
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产品关联
DOI
高影响因子
ACS Omega
·
2020
·
IF 2.87
Junhui Yang,Cuicui Ding,Lele Tang,Feng Deng,Qili Yang,Hui Wu,Lihui Chen,Yonghao Ni,Liulian Huang,Min Zhang
Because of poor water solubility and low thermostability, the application of collagen is limited seriously in fields such as injectable biomaterials and cosmetics. In order to overcome the two drawbacks simultaneously, a novel bifunctional modifier based on the esterification of polyacrylic acid (PAA) with N-hydroxysuccinimide (NHS) was prepared. The esterification degree of PAA-NHS esters was increased upon increasing the NHS dose, which was confirmed by Fourier-transform infrared (FTIR) and nuclear magnetic resonance spectrascopy. FTIR results indicated that the triple helix of the modified collagens remained integrated, whereas the molecular weight became larger, as reflected by the sodium dodecyl sulfate–polyacrylamide gel electrophoresis pattern. The modified collagens displayed excellent water solubility under neutral condition, owing to lower isoelectric point (3.1–4.3) than that of native collagen (7.1). Meanwhile, denaturation temperatures of the modified collagens were increased by 4.8–5.9 °C after modification. The modified collagen displayed hierarchical microstructures, as reflected by field-emission scanning electron microscopy, while atomic force microscopy further revealed a “fishing net-like” network in the nanoscale, reflecting a unique aggregation behavior of collagen macromolecules after modification. As a whole, the PAA-NHS ester as a bifunctional modifier endowed collagen with desired water solubility and thermostability in a conflict-free manner, which was beneficial to the process and application of the water-soluble collagen.
研究领域:
生物材料
·
化妆品
·
材料科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Meijuan Lan,Tongshuai Li,Lin Li,Shaoyun Wang,Juncheng Chen,Tangyu Yang,Zhiru Li,Yipeng Yang,Xia Zhang,Bing Li
The physiochemical properties, structure characteristics, oxidation, and emulsifying properties of myofibrillar proteins (MPs) in low salt solution after treated by the ultrasound were investigated. The solubility, mean diameters, sulfhydryl content, and carbonyl contents of MPs after ultrasonic treatment increased, while the turbidity decreased. The surface hydrophobicity of MPs with 200 W–600 W treatment increased, but decreased at 800 W treatment. The circular dichroism analysis revealed that α-helix content increased, while β-sheet and random coil content decreased after ultrasonic treatment. Fluorescence spectroscopy indicated the fluorescence intensities of MPs were increased after ultrasonic treatment. SDS-PAGE results showed more protein polymers due to myosin heavy chain (MHC) aggregation via disulfide bonds. Based on LC-MS/MS result, the myosin heavy chain was susceptible to oxidation, with monooxidation being the main oxidative modification. Finally, the emulsions stabilized by ultrasonically treated MPs, especially those treated at 800 W, exhibited decreased particle size, improved uniformity, and enhanced stability.
研究领域:
食品科学
·
蛋白质化学
·
生物物理学
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产品关联
DOI
PubMed
高影响因子
Marine Drugs
·
2023
·Vol. 21
·期 5
·260
·
IF 5.4
Zhilin Pan,Baolin Ge,Mingjun Wei,Jeevithan Elango,Wenhui Wu
Numerous studies have shown that type II collagen (CII) has a potential role in the treatment of rheumatoid arthritis. However, most of the current studies have used terrestrial animal cartilage as a source of CII extraction, with fewer studies involving marine organisms. Based on this background, collagen (BSCII) was isolated from blue shark (Prionace glauca) cartilage by pepsin hydrolysis and its biochemical properties including protein pattern, total sugar content, microstructure, amino acid composition, spectral characteristics and thermal stability were further investigated in the present study. The SDS-PAGE results confirmed the typical characteristic of CII, comprising three identical α1chains and its dimeric β chain. BSCII had the fibrous microstructure typical of collagen and an amino acid composition represented by high glycine content. BSCII had the typical UV and FTIR spectral characteristics of collagen. Further analysis revealed that BSCII had a high purity, while its secondary structure comprised 26.98% of β-sheet, 35.60% of β-turn, 37.41% of the random coil and no α-helix. CD spectra showed the triple helical structure of BSCII. The total sugar content, denaturation temperature and melting temperature of BSCII were (4.20 ± 0.03)%, 42 °C and 49 °C, respectively. SEM and AFM images confirmed a fibrillar and porous structure of collagen and denser fibrous bundles formed at higher concentrations. Overall, CII was successfully extracted from blue shark cartilage in the present study, and its molecular structure was intact. Therefore, blue shark cartilage could serve as a potential source for CII extraction with applications in biomedicine.Keywords:type II collagen;blue shark (Prionace glauca) cartilage;microstructure;thermal stability
研究领域:
生物化学
·
生物技术
·
海洋生物学
·
医学
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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）