INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2016
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IF 3.138
Hong Niu,Dan Song,Yuelin Sun,Wuxia Zhang,Haibo Mu,Jinyou Duan
In this study, one homopolysaccharide (ACPA1) with a molecular weight (Mw) of 5.5 × 10 3 g/mol was prepared from the roots of Actinidia chinensis . It was characterized as an α- d -glucan consisting of predominant 4-linked α- d -Gl cp residues branched at O-6. Three sulfated derivatives of ACPA1 (SA1, SA2 and SA3) with different degrees of sulfation (DS) were obtained by SO 3 -pyridine procedure. Moisture-preserving tests demonstrated that the sulfated derivatives with the highest DS values, SA1 and SA2, exhibited better moisture-preserving abilities than ACPA1 and SA3. All sulfated derivatives exerted stimulatory effects on phagocytosis activity and nitric oxide production by RAW 264.7 macrophages while ACPA1 did not. These findings suggested that the sulfated derivatives of ACPA1 might be used as moisture-preserving or immunopotentiating reagents.
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POULTRY SCIENCE
·
2024
·
IF 3.8
Linglian Kong,Peng Sun,Xue Pan,Chuanpi Xiao,Bochen Song,Zhigang Song
ABSTRACT Macrophages play a crucial role in both innate and adaptive immunity. However, their abnormal activation can lead to undesirable inflammatory reactions. This study aimed to investigate the effects of glycerol monolaurate (GML), a natural monoester known for its anti-inflammatory and immunoregulatory properties, on avian macrophages using the HD11 cell line. The results indicated that a concentration of 10 μg/mL of GML enhanced the phagocytic activity of HD11 cells ( P < 0.05) without affecting cell viability ( P > 0.05). GML decreased the expression of M1 macrophage polarization markers, such as CD86 and TNF-α genes ( P < 0.05), while increasing the expression of M2 macrophage polarization markers, such as TGF-β1 and IL-10 genes ( P < 0.05). GML suppressed ROS production, apoptosis, and the expression of proinflammatory genes (IL-1β and IL-6) induced by LPS ( P < 0.05). GML also promoted the expression of TGF-β1 and IL-10 ( P < 0.05), both in the presence and absence of LPS exposure. Moreover, GML suppressed the gene expression of TLR4 and NF-κB p65 induced by LPS ( P < 0.05), as well as the phosphorylation of NF-κB p65 ( P < 0.05). In conclusion, GML exhibited regulatory effects on the polarized state of avian macrophages and demonstrated significant anti-apoptotic and anti-inflammatory properties by suppressing intracellular ROS and the NF-κB signaling pathway.
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Journal of Inorganic and Organometallic Polymers and Materials
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2024
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IF 3.9
Li Mengke,Cao Panpan,Dong Wenwen,Zhao Jun,Li Dongsheng
Organic dyes pollution has caused significant threat to flora, fauna and humans because the toxic of dyes. In this work, with the help of acetic acid as a defect initiator, the hierarchical porous MIL-101(HP-MIL-101) has been synthesized and used for removing anionic dyes Eosin y (EY), Methyl orange (MO), Congo red (CR) and Acid fuchsin (AF) from water. Due to its positive surface charge, larger specific surface area, well-matched pore structure, and the charge, size, and diameter of dyes, HP-MIL-101 showed rapid adsorption and an excellent maximum adsorption capacity of 425 and 336 mg⋅g − 1 for CR and AF, respectively. A series of batch experiments were carried out to investigate the impact of various key factors, including adsorption duration, initial dye concentration, and temperature. In addition, the kinetics, isotherm, and thermodynamics about the adsorption properties were also discussed. In addition, HP-MIL-101 showed stable and high reusability for at least three cycles, with an efficiency of over 95% without significant structural changes. This study highlights the potential of hierarchical porous MOF for mitigating dye pollution and advancing sustainable water treatment methodologies.
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Journal of Environmental Sciences
·
2024
·
IF 5.9
Yunjin Yao,Zhongming Tao,Hongwei Hu,Lijie Zhang,Ziwei Ma,Yaoyao Wang,Shiyang Lin,Shaobin Wang
Catalytic oxidation of organic pollutants is a well-known and effective technique for pollutant abatement. Unfortunately, this method is significantly hindered in practical applications by the low efficiency and difficult recovery of the catalysts in a powdery form. Herein, a three-dimensional (3D) framework of Fe-incorporated Ni 3 S 2 nanosheets in-situ grown on Ni foam (Fe-Ni 3 S 2 @NF) was fabricated by a facile two-step hydrothermal process and applied to trigger peroxymonosulfate (PMS) oxidation of organic compounds in water. A homogeneous growth environment enabled the uniform and scalable growth of Fe-Ni 3 S 2 nanosheets on the Ni foam. Fe-Ni 3 S 2 @NF possessed outstanding activity and durability in activating PMS, as it effectively facilitated electron transfer from organic pollutants to PMS. Fe-Ni 3 S 2 @NF initially supplied electrons to PMS, causing the catalyst to undergo oxidation, and subsequently accepted electrons from organic compounds, returning to its initial state. The introduction of Fe into the Ni 3 S 2 lattice enhanced electrical conductivity, promoting mediated electron transfer between PMS and organic compounds. The 3D conductive Ni foam provided an ideal platform for the nucleation and growth of Fe-Ni 3 S 2 , accelerating pollutant abatement due to its porous structure and high conductivity. Furthermore, its monolithic nature simplified the catalyst recycling process. A continuous flow packed-bed reactor by encapsulating Fe-Ni 3 S 2 @NF catalyst achieved complete pollutant abatement with continuous operation for 240 h, highlighting its immense potential for practical environmental remediation. This study presents a facile synthesis method for creating a novel type of monolithic catalyst with high activity and durability for decontamination through Fenton-like processes.
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ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Lei Ge,Jiaqi Li,Gaojing Du,Kai Sheng,Jingwei Hou,Binyu Zhou,Yatao Zhang,Bart Van der Bruggen,Junyong Zhu
Microporous membranes featuring 3D nanochannels present a compelling avenue for energy-efficient liquid separations, attributable to their tunable interconnected through-pore structures. However, the rational design of 3D-nanochannel membranes that simultaneously achieve high permeance and selectivity remains a challenge, arising from the scarcity of appropriate molecular building blocks and the reliance on empirical synthetic methods. Herein, an innovative 3D polyacylhydrazone (PAH) membrane with unique pore-interconnected structures is constructed on a porous hydrogel using contorted tetrahedral aldehydes (TFS) monomers via an in situ interface-confined strategy. Manipulation of side alkyl chain lengths within terephthalohydrazide (TPH) derivates enabled the enhancement of microporosity and tunable pore environment of PAH nanofilms. Molecular dynamics simulations revealed that TPH EO linkers with higher reactivity and moderate steric hindrance facilitate superior pore interconnectivity and sharpened pore size distributions. The resulting PAH membranes achieved exceptional methanol permeances of 10.1 L m −2 h −1 bar −1 and small molecular weight cut-offs of 310 Da, outperforming the state-of-the-art polyamide membranes. This further translated into an outstanding capability in the fractionation of active pharmaceutical ingredients within organic solvent systems. This work demonstrates the efficacy of rational molecular design in developing high-microporosity membranes with tailored interconnected nanochannels, underscoring the potential of 3D microporous membranes for accurate molecular separations.
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CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Yunjin Yao,Wei Wang,Hongwei Hu,Lijie Zhang,Ziwei Ma,Shaobin Wang
Nickel–manganese bimetallic sulfide microparticles in situ grown on Ni foam (NiMnS@NF) with controllable morphology and composition were developed via a hydrothermal method to boost potassium periodate activation for oxidation of multiple micropollutants. Benefiting from the unique morphology and structure, along with a synergistic effect of different components, the optimized NiMnS@NF exhibits outstanding performance and durability in potassium periodate activation, surpassing other oxidant systems (e.g., H 2 O 2 , peroxydisulfate, and peroxymonosulfate). Electron spin resonance analysis, scavenging tests, electrochemical analysis, and galvanic oxidation tests unveiled that NiMnS@NF can initiate the activation of potassium periodate, resulting in the formation of high-potential metastable intermediates (NiMnS@NF–potassium periodate*). Additionally, superoxide radical anions play a cooperative role in organic elimination. The experimental results further indicate that the synergy among Mn/Ni and S induces a local charge redistribution, improving electron transfer capability and Mn(II)/Mn(III)/Mn(IV) and Ni(II)/Ni(III) redox reactions. This work proposes a feasible and efficient monolithic catalyst for environmental remediation.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Dandan Xie,Xiaochuan Yang,Hang Wang,Qiuxia Fu,Fayun Wei,Nuo Liu,Hailou Wang,Guangyu Zhang,Jiamu Dai,Chunhong Zhu,Wei Zhang
The reuse and development of natural waste resources is a hotspots and challenges in the research of new fiber materials and the resolution of environmental concern globally. Herein, this study aimed to develop a simple and direct manual extraction process to extract Musa core fibers (MCFs) for rapid water conduction and evaporation. Through simple processes such as ring cutting and stretching, this green and non-destructive inside-out extraction strategy enabled Musa fibers to be naturally and harmlessly degummed from natural Musa stems, with good maintenance of the fiber structure and highly helical morphology. The extracted fibers are composed of regularly and closely arranged cellulose nanofibrils in the shape of ribbon spirally arranged multi-filaments, and the single filament is about 2.65 μm. The high-purity fibers exhibit ultra-high tensile strength under a non-destructive extraction process, and the ultimate tensile strength in dry state is as high as 742.95 MPa. The tensile strength is affected by the number of fiber bundles, which shows that tensile strength and tensile modulus is higher than those of vascular bundle fibers in dry or wet condition. In addition, the MCFs membrane indicates good water conductivity, with a water absorption height of 50 mm for the sample in only 60 s. Moreover, the water evaporation rate of MCFs reaches 1.37 kg m −2 h −1 in 30 min, which shows that MCFs have excellent water conductivity and evaporation rate compared with ordinary cotton fibers . These results indicate that MCFs have great potential in replacing the use of chemical methods to extract fibers from vascular bundles, providing an effective way to achieve sustainability in quick-drying applications, as well as in the sustainable development of natural waste resources.
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NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 16
·7439-7448
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IF 2.7
Xiaoyu Yang,Hongdan Wu,Zhihui Zhou,Yehao Zhao,Yuedong Li
Two-dimensional (2D) layered MoS2 membrane has a unique pore structure, adjustable interlayer spacing and excellent transmission performance, which has wide-ranging and excellent application prospects for water treatment. However, the MoS2 membrane exhibits a narrow interlayer height, which can only accommodate one layer of water molecules, causing low water permeation and flux. In this work, a MoS2/SiO2 composite membrane with regular transport channels was prepared by the vacuum-assisted self-assembly (VASA) process using the intercalation of nano-silica (SiO2) nanoparticles. The resulting membrane showed an increase in interlayer widths from 0.61 nm to 0.69 nm. The MoS2/SiO2 composite membrane featured a high-efficiency dye separation performance and aqueous stability as the mass ratio of MoS2/SiO2 was 2.5, and the water permeance flux could reach 979 L m−2 h−1 bar−1, with a rejection of 100% for Evans blue (EB), methyl blue (MB) and neutral red (NR) and a rejection of over 98% for rhodamine B (RhB). MoS2 membranes decorated by SiO2 nanosheet nanoparticles could effectively achieve precision regulation of interlayer spacings and hold the channel order of MoS2 laminates. In addition, the rejection rate of the composite membrane remained 100% after remaining immersed in strong oxidizing acid for up to 60 days, which showed their stability toward strong acid and oxidative environments. This work suggests that an interlayer manipulation strategy in 2D laminar membranes could improve membrane performance for wastewater treatment and other separations.
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SENSORS
·
2018
·Vol. 18
·期 3
·681
·
IF 2.475
Xiaoyang Du,Xiaoxia Zhang,Chunlai Jiang,Weilu Zhang,Lizhu Yang
A novel fluorescence sensor of NR-β-CD@AuNPs was prepared for the trace detection of nitrite in quantities as low as 4.25 × 10−3μg∙mL−1in an aqueous medium. The fluorescence was due to the host-guest inclusion complexes between neutral red (NR) molecules and gold nanoparticles (AuNPs), which were modified by per-6-mercapto-beta-cyclodextrins (SH-β-CDs) as both a reducing agent and a stabilizer under microwave radiation. The color of the NR-β-CD@AuNPs changed in the presence of nitrite ions. A sensor was applied to the determination of trace nitrites in environmental water samples with satisfactory results.Keywords:gold nanoparticles;cyclodextrin;neutral red;nitrite ions;fluorescence sensor;trace detection
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2018
·
IF 6.653
Abdul Ghaffar,Lina Zhang,Xiaoying Zhu,Baoliang Chen
Graphene oxide (GO) membranes are robust and continue to attract great attention due to their fascinating properties, despite their potential issues regarding stability and selectivity in aqueous-phase processing. That being said, however, the functional moieties of GO could be used for membrane surface modification, while ensuring simultaneous removal and recycling of industrial organic dyes. Herein, we present a versatile porous structured polyvinylidene fluoride–graphene oxide (PVdF-GO) nanofibrous membranes (NFMs), prepared by using simple and straightforward electrospinning approach for selective separation and filtration. The GO nanosheets were distributed homogeneously throughout the PVdF nanofiber, regulating the surface morphology and performance of PVdF-GO NFM. The PVdF-GO NFMs possesses high mechanical strength and surface free energy (SFE), consequently resulting high permeation and filtration efficiency as compared to PVdF NFM. The selectivity (99%) toward positively charged dyes based on electrostatic attraction, while maintaining rejection (100%) for negatively charged dye from mixed solutions highlight the role of GO in PVdF-GO NFM, owing to uniform pores and negatively charged surface. In addition, the actual efficiency of NFMs could be recovered easily up to three consecutive filtration cycles by regeneration, thereby assuring high stability. The high permeation, purification and filtration efficiency, good stability and recycling of PVdF-GO NFMs are promising for use in practical water purification and applications, particularly for selective filtration and recycling of dyes.
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Nanoscale
·
2024
·Vol. 16
·期 48
·22273-22282
·
IF 5.8
Feng Li,Kairen Zhao,Yan Jin,Baoxin Li
Currently, water treatment usually requires additional light illumination or oxidants for the degradation of organic pollutants, which increases the costs and is not conducive to practical application. In this study, carbon vacancy-modified Fe–N–C single-atom catalysts (Cv-Fe–N–C SACs) were prepared through one simple acid-etching and pyrolysis process. Interestingly, we found that Cv-Fe–N–C SACs could degrade organic pollutants without any external assistance (such as oxidants or light illumination). The Cv-Fe–N–C SACs could remove over 99% of Rhodamine B (RhB) within 10 min at room temperature. The degradation of organic pollutants with the Cv-Fe–N–C SACs was attributed to their ability to activate dissolved oxygen for producing superoxide (O2˙−). In addition, the catalysts showed high activity over a broad pH range (3–11) and held rather good stability after 5 recycles. This study proved that the Cv-Fe–N–C SACs are highly efficient catalysts for degrading organic pollutants. These catalysts have the potential to make sewage treatment more efficient and less expensive.
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COLLOIDS AND SURFACES B-BIOINTERFACES
·
2024
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IF 5.4
Huilin Chen,Ran Xu,Enyu Xu,Yan Chen,Chunyu Niu,Yin Chen
Polysaccharides have garnered significant attention as potential nanoparticle carriers for targeted tumor therapy due to their excellent biodegradability and biocompatibility . Polyguluronic acid (PG) is a homogeneous acidic polysaccharide fragment derived from alginate, which is found in brown algae , possesses excellent bioactivities, unique properties. This study explored the immunomodulatory activity of PG and developed PG-based nanogels through modified disulfide bonds and Ca 2+ dual crosslinking. We characterized their structure, assessed their drug-loading and release properties, and ultimately validated both the safety of the nanocarrier and the in vitro anti-tumor efficacy of the encapsulated drug. Results indicated that PG significantly enhanced the proliferative activity and phagocytosis of RAW264.7 cells while promoting reactive oxygen species (ROS) production and cytokine secretion. The study identified TLR4 as the primary receptor for PG recognition in RAW264.7 cells. Furthermore, PG-based drug-carrying nanogels were prepared, exhibiting uniform sizes of about 184 nm and demonstrating exceptional encapsulation efficiency (82.15 ± 0.82 %) and drug loading capacity (8.12 ± 0.08 %). In vitro release experiments showed that these nanogels could responsively release drugs under conditions of high glutathione (GSH) reduction, facilitating drug accumulation at tumor sites and enhancing therapeutic efficacy. This research not only expands the application of PG in drug delivery systems but also provides valuable insights into leveraging natural immunomodulatory polysaccharides as carriers for targeted drug delivery .
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