International Journal of Food Engineering
·
2024
·
IF 1.6
Yanlei Li,Yiying Sun,Lin Lu,Zhiming Gao,Yuehan Wu,Dan Yuan,Wenxin Jiang
To obtain rapeseed protein with low phytic acid (PA), soy protein isolate (SPI) was used to investigate the interactions between SPI and PA. The influence of pretreatment (soaking using salt solution and dialysis) of the defatted rapeseed meal on the PA and protein content in the final rapeseed proteins was also studied. The results showed that electrostatic interactions dominated the protein–PA interaction, which was affected by pH and ionic strength. Accordingly, the pH and ionic strength in the soaking medium also influenced the PA remained in the rapeseed proteins. The PA content decreased with the ionic strength (400–800 mM) and relatively low PA was obtained at pH 6.0 (soaking environment). Finally, 52.8 % of the PA have been removed and PA content remained in rapeseed protein isolate (RPI) reached about 0.84 mg/g, at the same time, the protein content was maintained around 86.70 %. Overall, soaking using salt solution and dialysis could be an effective method to achieve high quality rapeseed protein with low PA.
研究领域:
食品科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
Gels
·
2025
·Vol. 11
·期 1
·80
·
IF 5.3
Xue Sun,Bolan Wu,Na Li,Bo Liu,Shijun Li,Liang Ma,Hangyu Zhang
Peptides can be designed to self-assemble into predefined supramolecular nanostructures, which are then employed as biomaterials in a range of applications, including tissue engineering, drug delivery, and vaccination. However, current self-assembling peptide (SAP) hydrogels exhibit inadequate self-healing capacities and necessitate the use of sophisticated printing apparatus, rendering them unsuitable for 3D printing under physiological conditions. Here, we report a precisely designed charged peptide, Z5, with the object of investigating the impact of electrostatic interactions on the self-assembly and the rheological properties of the resulting hydrogels. This peptide displays salt-triggered self-assembly resulting in the formation of a nanofiber network with a high β-sheet content. The peptide self-assembly and the hydrogel properties can be modified according to the ionic environment. It is noteworthy that the Z5 hydrogel in normal saline (NS) shows exceptional self-healing properties, demonstrating the ability to recover its initial strength in seconds after the removal of shear force, thus rendering it an acceptable material for printing. In contrast, the strong salt shielding effect and the ionic cross-linking of Z5 hydrogels in PBS result in the bundling of peptide nanofibers, which impedes the recovery of the initial strength post-destruction. Furthermore, incorporating materials with varied charging properties into Z5 hydrogels can alter the electrostatic interactions among peptide nanofibers, further modulating the rheological properties and the printability of SAP hydrogels.
研究领域:
生物材料学
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分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2020
·
IF 3.721
Yujie Zhang,Yunlong Huang,Ling Fu,Jiaoyan Qiu,Zhuqing Wang,Aiguo Wu
Paraquat (PQ) is a kind of herbicide, which is highly toxic to human body. In this work, we proposed a fast and simple detection method for PQ in aqueous samples based on electrostatic interactions between modified gold nanoparticles (Au NPs) and PQ. Au NPs were first modified with sodium 3-mercapto-1-propanesulfonate (Au NPs-3MPS). 3MPS with negative charge can interact with nitrogen atoms of PQ with positive charge via electrostatic force. As a result, Au NPs-3MPS aggregated together. Accordingly, the color of Au NPs-3MPS colloid changed from red to blue-gray, and the UV–vis absorption spectrum changed accordingly. The detection limit of PQ is 0.1 mg/L by naked eyes, and 0.001 mg/L by UV–vis spectroscopy. Moreover, this detection method has good specific selectivity and anti-interference performance, and it has been successfully used for detecting PQ in real environmental samples and fruit juice samples.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2022
·Vol. 15
·期 6
·2039
·
IF 3.748
Yueqi Zhang,Bin Du,Yuting Wu,Zhiwei Liu,Jiang Wang,Jianjie Xu,Zhaoyang Tong,Xihui Mu,Bing Liu
Bacterial infection is a significant cause of morbidity and mortality to humans worldwide. Thus, a method for nonspecific, sensitive, and rapid enrichment of such bacteria is essential for bacteria detection and treatment. This study demonstrates a self-made core-shell Fe3O4@Polydopamine@Polyethyleneimine magnetic beads (Fe3O4@PDA@PEI MBs) with a high density positive charge-based magnetic separation scheme for the broad-spectrum rapid enrichment of microorganisms in the liquid phase. MBs with a high-density positive charge have a strong electrostatic attraction to most microorganisms in nature. Our scheme is as follows: (1) wrapping dopamine (DA) on the iron oxide through self-polymerization and wrapping PEI on the outermost shell layer in a mode of crosslinking with the PDA; (2) subsequently, the Fe3O4@PDA@PEI MBs were used to concentrate microorganisms from the sample solution; (3) performing magnetic separation and calculating the adsorption efficiency. The as-prepared Fe3O4@PDA@PEI MBs composite was carefully characterized by zeta potential analysis, Value stream-mapping (VSM), transmission electron microscopy (TEM), and Fourier transforms infrared spectrometry (FT-IR). In this study, both gram-positive and gram-negative bacteria could be captured in three minutes through electrostatic interaction. Furthermore, the adsorption efficiency on gram-negative (>98%) is higher than that on gram-positive (>95%), allowing for a simple, rapid assay to enrich organisms in resource-limited settings.Keywords:magnetic beads;bacterial enrichment;magnetic separation;electrostatic interaction
研究领域:
微生物学
·
医学工程
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产品关联
DOI
PubMed
高影响因子
CHEMICAL PHYSICS LETTERS
·
2021
·
IF 2.328
Wen li Zhao,Yan hua Gao,Dongfeng Zhang
In this paper, spherical g-C 3 N 4 modified by N defect and O doping was prepared by a simple hydrothermal method , and combined with CdS to form a direct Z-type heterojunction . Combined with a series of characterizations (XRD, SEM, BET, FTIR and UV–vis DRS), the results show that the addition of CTAB brings a lot of positive charges on the surface of N-OCN. According to the principle of electrostatic attraction, positively charged N-OCN negatively charged CdS attract each other, which strengthens the close contact between CdS and N-OCN and plays an important role in stabilizing the formation of heterojunction. CdS is anchored to N-OCN through electrostatic interaction. Under the irradiation of visible light, the electrons on CB on positively charged N-OCN combine with holes on negatively charged CdS valence band, which improves the redox ability in photocatalytic reaction system. Taking methyl orange (MO) as a pollutant degradation model, the possible degradation mechanism was discussed in detail. This study provides a simple, effective and wide application method for the modification of g-C 3 N 4 .
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2020
·
IF 7.864
Yinqing Zhang,Jinliang Xu,Yi Yang,Binbin Sun,Kunkun Wang,Lingyan Zhu
With increasing utilization of silver nanomaterials, growing concerns are raised on their deleterious effects to the environment. Once discharged in an aquatic environment, the interactions between silver nanowires (AgNWs) and proteins may significantly affect the environmental behaviors, fate, and toxicities of AgNWs. In the present study, three representative model proteins, including ovalbumin (OVA), bovine serum albumin (BSA), and lysozyme (LYZ), were applied to investigate the impacts of the interactions between proteins and AgNWs on the transformations (oxidative dissolution and sulfidation) of AgNWs in an aquatic environment. Fluorescence spectroscopy and isothermal titration calorimetry analyses indicated that there was very weak interaction between OVA or BSA and AgNWs, but there was a strong interaction between the positively charged LYZ and the negatively charged AgNWs. The presence of LYZ not only reversed the surface charge of AgNWs but also resulted in the breakup of the nanowire structure and increased the reactive surface area. The positively charged surface of AgNWs in the presence of LYZ favored the access of sulfide ions. As a consequence, the kinetics of oxidative dissolution and sulfidation of AgNWs were not affected by OVA and BSA but were significantly facilitated by LYZ. The results shed light on the important roles of electrostatic interactions between AgNWs and proteins, which may have important implications for evaluating the fate and effects of silver nanomaterials in complicated environments.
研究领域:
环境科学
·
纳米生物学
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2018
·
IF 2.21
Yuanfang Xiang,M. Katherine Banks,Ruoxi Wu,Weijian Xu,Shu Chen
A thermo-sensitive graphene-based hybrid is prepared by the electrostatic interactions between the poly(diallyldimethylammonium chloride)-co-poly(N- isopropylacrylamide) (PDDA-co-PNIPAM) and graphene oxide (GO). The electrostatic interaction, chemical structure , morphology and thermo-sensibility of the hybrid are systematically characterized, which have been manifested that the electrostatic interaction between the PDDA-co-PNIPAM and GO is strong, and the employment of the cationic PDDA-co-PNIPAM results into a well distributed polymer nanoparticles on the GO sheets. The new PDDA-co-PNIPAM/GO hybrid has good dispersity in some polar solvents. Notably, the phase transition of this hybrid can be reversibly modulated by temperature in water, which can be applied as thermo-switch material for the adsorption and separation of the organic pigments in aqueous solutions.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2019
·
IF 1.479
Jialiang Chen,Lirong Fu,Yan Li,Xiaodeng Yang,Beibei Wang,Chunlin Xu,Tianduo Li
To illuminate the interactions in N-[(2-hydroxyl)-propyl-3-trimethyl ammonium] chitosan chloride (HTCC)/sodium carboxymethyl cellulose (CMC) based films, the film-forming solutions were studied by rheology, and HTCC/CMC based films were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy and thermogravimetric analysis. The HTCC/CMC based film-forming solutions with glycerol (polyvinyl alcohol (PVA) and anthocyanin) showed shear-thinning behavior. The apparent viscosity of the HTCC/CMC/glycerol (PVA and anthocyanin) film-forming solutions decreased slower than that of HTCC/CMC film-forming solution, due to the electrostatic interaction between HTCC and CMC, and hydrogen bonding interaction between the two biomacromolecules and glycerol, PVA and anthocyanin, which resulted in the formation of three-dimensional networks. The anthocyanin with rigid molecular structure formed different three-dimensional matrix with HTCC/CMC, resulted in viscosity dominated film-forming solution. The pH affected the electrostatic interaction between HTCC, CMC, and anthocyanin through neutralizing –COO− groups, and temperature showed a synergistic effect on both electrostatic interaction and hydrogen bonding. The inter-molecular interactions resulted in the red-shift of typical absorption peaks, and the increase of initial decomposition temperature and decomposition enthalpy of HTCC/CMC based films. The homogenous and smooth surface, and the compact texture of HTCC/CMC based films confirmed the intermolecular interaction between HTCC, CMC, and PVA (glycerol and anthocyanin).
研究领域:
材料科学
·
生物化学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Shiqin Liu,Wenjian Ji,Ting Wu,Yingqi He,Yuxiang Huang,Yanglun Yu,Wenji Yu
Due to the biodegradable, biocompatible, sustainable, and renewable properties of lignocellulosic materials, there is growing interest in developing functional materials based on lignocellulosic components using green strategies. For example, the surface of lignocellulosic materials can be modified using polyphenols with inherent characteristics such as metal chelation and reducibility to prepare functional materials with flame retardant, antibacterial, and self-cleaning properties. Understanding the fundamental interaction mechanisms between lignocellulosic materials and polyphenols is crucial for these applications and the design of lignocellulosic-based functional materials. In this study, we used wood fibers (WFs) and tannic acid (TA) as typical representatives of lignocellulosic materials and polyphenols, respectively. We combined adsorption isotherm models and density functional theory simulations to reveal the interaction mechanisms between the main components of WFs (cellulose, hemicellulose, and lignin) and TA. Cellulose and hemicellulose primarily interacted with TA through hydrogen bonding, electrostatic interaction, and hydrophobic interaction, while lignin–TA interactions are hydrogen bonding and electrostatic interaction. For WFs, their pore structure and exposed surface components determined their binding with TA. The adsorption of TA on WFs followed the Langmuir model for monolayer adsorption, with the main driving forces being hydrogen bonding, electrostatic interactions, and van der Waals forces between surface cellulose components and TA. Our findings provide new insights into the interaction mechanisms between lignocellulosic materials and polyphenols, offering valuable guidance for the development of lignocellulosic/polyphenol composite functional materials with environmental, biomedical, and engineering applications.
研究领域:
材料科学
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Hui Liu,Hao Chen,Xiaofeng Xie,Chaofang Li,Fenghua Shen,Pingshan Wang,Kaisong Xiang
Low-temperature gaseous elemental mercury (Hg 0 ) abatement is an objective demand in industrial flue gas treatment . In this work, we proposed a new approach for Hg 0 capture via weak interaction of ionic liquids . Ionic liquids with varied anions (1-butyl-3-methylimidazolium thioacetate ([Bmim][ThAc]), 1-butyl-3-methylimidazolium diethyldithiocarbamate ([Bmim][DTCR]), and 1-butyl-3-methylimidazolium ethylxanthate ([Bmim][EX])) were designed and synthesized. The interaction energies between ionic liquids and elemental mercury were proved to be positively related to mercury removal efficiency, revealing that the electrostatic interaction derived physical adsorption from anions is the dominant factor affecting mercury removal performance. [Bmim][ThAc] with the largest anionic electrostatic interaction energy showed the best mercury abatement performance, achieving a Hg 0 removal efficiency of over 98% and an adsorption capacity of 10.66 mg/g at 50 °C. The influence of temperature and the results of mercury temperature-programmed desorption (Hg-TPD), X-ray photoelectron spectroscopy (XPS) further confirmed that the ionic liquid combines with elemental mercury through physical adsorption. The work provides a new perspective on designing high-efficiency sorbents for mercury removal at low temperature.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qi Zhao,Xiaoyue Liang,Chunju He
Solid phase extraction is an effective method for the separation and purification of nucleic acid molecules, which still suffers from high loss and low efficiency. Herein, a polyether sulfone membrane adsorber for deoxyribonucleic acid (DNA) separation and purification is constructed by combining vapor-induced phase separation (VIPS) technique and in-situ coupling reaction. More specifically, the slow phase separation during VIPS promotes the formation of reaction platform with loose bicontinuous structure, high porosity and surface segregation of poly (acrylic acid), which is subsequently highly aminated by in-situ coupling of polyethyleneimine. Significantly, the reversible binding of amine ligands to DNA is solely based on electrostatic interaction, which is regulated by medium pH, avoiding the requirement for additional binding agents as encountered by commercial silica matrices and dramatically reducing DNA loss. Consequently, the resulting membrane adsorber exhibits excellent DNA binding capacity of 293.3 mg·g −1 and improved dynamic DNA recovery efficiency of 85.2 %, far exceeding that of commercial silica matrices (55.5 %). This work provides a major breakthrough in the field of nucleic acid separation and purification, paving the way to construct next-generation solid phase extraction materials for biomacromolecules.
研究领域:
生物技术
·
分子生物学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2016
·
IF 3.014
Zuxue Mo,Hongwei Guo,Yufei Wang,Hairong Yin,Chen Yang,Jianbo Song
Magnetic paper manufactures are nowadays widely used in information storage, electromagnetic shielding and security industry for its outstanding performances. In this article, Tb-doped germanium borosilicate glass was prepared by melt quenching technique and they were used as magnetic sources of magnetic paper to loading into the bamboo fibers. Magnetic paper has been successfully produced by adding inorganic magnetic particles modified by different concentrations of graphene oxide (GO) solution. The samples were characterized by Fourier Transform Infrared Spectroscopy (FT-IR), Raman Spectroscopy , Superconducting Quantum Interferometer Device (SQUID) and Scanning Electron Microscope (SEM). The results shown that the structure of magnetic particle are made from [BO 3 ], [BO 4 ], [A1O 6 ], [SiO 4 ] and [GeO 4 ]. GO sheets had been successfully immobilized on magnetic particles (MPs) surface via electrostatic interaction . SQUID indicated that the magnetic particles and papers were paramagnetic materials . SEM images clearly shown that the MPs loaded into the lumen of bamboo fibers and the interstitial of fibers. Bridge-fibers that connecting other cellulose fibers and MPs by hydrogen bonds were formed in the network of paper due to the functional groups on surface of magnetic particles. The mechanical properties of papers increased with the increment of GO concentration, which is correlated with the hydrogen-bonding that forming by bridge-fibers and other cellulose fibers in network of paper.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）