Food Packaging and Shelf Life
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2024
·
IF 8.5
Jing Yi,Shuqi Zhang,Xuanxuan Yuan,Zhilong Zhang,Zhongguo Shan,Haihua Wang
The increasing emphasis on food quality and consumer safety has prompted researchers to explore green manufacturing techniques for packaging materials. In this study, γ-cyclodextrin metal-organic frameworks (γ-CD-MOFs) were prepared as promising nanocarriers for gallic acid (GA) and silver nanoparticles (Ag NPs). These nanocarriers (GA-Ag@CD-MOFs) were further incorporated into a zein matrix to fabricate multifunctional composite films, referred to as MOFs-Zein. Scanning electron microscopy (SEM) and atomic force microscope (AFM) analysis indicated that the fabricated composite film exhibited excellent biocompatibility, with GA-Ag@CD-MOFs uniformly dispersed within the film matrix. Fourier transform infrared spectroscopy (FT-IR) result revealed that the incorporation of GA-Ag@CD-MOFs facilitated the formation of intermolecular hydrogen bonds with the matrix polymer. The addition of GA-Ag@CD-MOFs enhanced the tensile strength of the composite film by 19.70 %, improved the water barrier performance by 57.76 %, and provided almost 100 % UV protection. The exceptional controlled release capability of γ-CD-MOFs for GA empowered the composite films to maintain their robust initial antioxidant capacity even after 100 days of storage. Moreover, the composite films performed high-efficiency antibacterial activity against Escherichia coli O157:H7 and Salmonella enterica . Acute toxicological studies showed no histopathology related toxicity was found in GA-Ag@CD-MOFs treated mice. When applied to fresh pork, the composite films significantly reduced the key quality indicators of raw meat, compared to the control film. Overall, this work presents a promising approach to fabricate the composite films as a sustainable and functional solution for green functional food packaging.
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Catalysts
·
2024
·Vol. 14
·期 12
·924
·
IF 3.8
Yu Yue,Guozhi Zhu,Min Liu,Yue Zhu,Weilong Ji,Xiaoqin Si,Tianliang Lu
As an important biomass resource, γ-valerolactone (GVL) shows considerable potential for applications in biofuel production, organic synthesis, polymer, and food industries. Herein, an effective method was presented for synthesizing GVL through the catalytic transfer hydrogenation (CTH) of ethyl levulinate (EL) under mild conditions. Using isopropanol as a hydrogen donor, a 100% conversion of ethyl levulinate and an 88.7% yield of GVL were achieved over 2%Zr-Beta-7d catalyst at 110 °C for 8 h. The acidic sites of synthesized Zr-Beta via hydrothermal methods easily adjusted and offered high catalytic activity and selectivity. The Lewis (L) acid sites on the zeolite serve as the active centers for the conversion of EL. Characterization results indicate that the amounts of L acid sites on Zr-Beta increased with the Zr content and crystallization time rose, thus enhancing the selectivity for GVL. Additionally, the influences of catalyst dosage, reaction temperature, and time on catalytic performance are studied, as well as calculations of kinetic parameters such as reaction rate constants and activation energies. The 2%Zr-Beta-7d catalyst retains its high performance after five cycles. The current research may present an efficient approach for the conversion of EL to GVL under mild conditions.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2024
·
IF 6.9
Shupo Liu,Zixiang He,Xiaobin Liao,Xinyue Liu,Menglan Gao,Huayu Zhang,Jing Zou,Zhenming Zhou,Baoling Yuan,Zhimin Yang
Antibiotics and ammonia are generally co-existed in aquaculture tailwater; moreover, ammonia would also be produced from during ozonation, and should be simultaneously removed before discharge or reuse. In this study, catalyst Cu-Co/γ-Al 2 O 3 was screened from a variety of metal oxides and applied in catalytic ozonation of three kinds of antibiotics and NH + 4 -N. Factors that affected their removal, including catalyst dosages, O 3 concentration, initial pH as well as co-existing ions, were investigated. Moreover, the mechanisms were probed by exploring free radicals’ role as well as intermediates identification; and the characteristics of catalysts before and after use were evaluated using SEM, EDS, XRD, XPS, and BET. Results demonstrated that Cu-Co/γ-Al 2 O 3 could significantly stimulate the degradation of the selected antibiotics and NH + 4 -N during ozonation. The degradation efficiencies of ciprofloxacin (CIP), tetracycline (TC), sulfamethoxazole (SMX) and NH + 4 -N can reach up to 95.0 %, 100.0 %, 96.2 %, and 75.7 %, respectively. Plenty of oxygen vacancy (O vs ) and sufficient alkaline sites on the surface of catalyst facilitated the adsorption of pollutants. Furthermore, the transformation of metal ions Cu + /Cu 2+ and Co 2+ /Co 3+ enhanced the electron transfer capacity and favored the formation of reactive oxygen species (ROS) during catalytic ozonation reaction, and their roles in catalytic ozonation has also been verified. The radical quenching experiments demonstrated that ·OH was the main contributor for enhancing pollutants removal. The results of Gaussian calculation coincided with those intermediates detected by UPLC-Q-TOF-MS, the pollutants’ removal mechanisms by catalytic ozonation were proposed basing on them. The overall toxicities were compared for ozone only/catalytic ozonation by zebrafish embryo experiment. The results of this study would provide new a feasible way for treating antibiotics and NH + 4 -N simultaneously in aquaculture wastewater.
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JOURNAL OF SUPERCRITICAL FLUIDS
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2024
·
IF 3.4
Dongjie Zhang,Yue Zhang,Yifei Li,Zanhong Wang,Yin Zhang,Haitao Li
This study reports a novel method for γ-valerolactone (GVL) production from ethyl levulinate (EL) utilizing non-noble metal catalysts within a supercritical isopropanol (IPA) system. Nickel-loaded nickel–aluminum oxide nanosheets (Ni X Al-R) were fabricated via hydrothermal treatment of Ni–Al layered double hydroxide precursors, followed by hydrogen reduction at 550 °C for 1.5 h. Using Ni X Al-R as the catalyst and IPA as the hydrogen donor , we achieved notable results: 82.7% EL conversion, 73.6% GVL yield, and 1.178 mol GVL g −1 h −1 reaction efficiency after 1.5 h in supercritical IPA. The catalytic activity of Ni X Al-R remained stable over five catalytic cycles. The surface of Ni X Al-R exhibits abundant oxygen vacancies and unsaturated Al species (Al x+ ), which promote the initial transfer hydrogenation of EL to form the ethyl 4-hydroxypentanoate (4-HPE) intermediate. Simultaneously, the supercritical IPA environment overcomes mass transfer limitations at the solid–liquid interface between 4-HPE and the catalyst, thereby facilitating the Al x+ -catalyzed intramolecular esterification of 4-HPE into GVL.
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Small
·
2024
·
IF 13
Yaping Wang,Xirui Wang,Han Yi,Linping Yan,Xuepin Liao,Bi Shi
Advanced X- and γ-ray-shielding materials are conventionally designed and fabricated via the uniform dispersion of high-Z elements into the substrate. These soluble high-Z elements considerably reduced the particle size of functional components; however, the as-obtained composites exhibited weak absorption region at 40–80 keV and poor water resistance. To address these issues, such materials are fabricated by introducing cerium and tungsten into regenerated collagen fibers (RCFs) using a “dual impregnation–desolvation” strategy. The uniform dispersion of functional components is achieved via the in situ generation of cerium–tungsten nanoparticles (CeW NPs) under multiple impregnating and desolvating cycles; as a result, the CeW NPs achieved an ultrasmall particle size of 17.15 nm. Benefiting from the ultrasmall particle size and uniform dispersion of CeW NPs, the fabricated CeW-RCF composites exhibit satisfactory X- and γ-ray-shielding capabilities with an ultrahigh mass attenuation coefficient (MAC) of 5.9 cm 2 g −1 at 83 keV, higher than that of lead plates. The CeW-RCF composites also exhibit outstanding mechanical strength, low density, and high air permeability, demonstrating their superior wearability. This work provides novel insights into the design and fabrication of advanced X- and γ-ray-shielding materials with high radiation-shielding performance and enhanced wearability.
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高影响因子
PHYTOTHERAPY RESEARCH
·
2025
·
IF 6.3
Jingyi Hu,Feng Xu,Lei Zhu,Yuan Cui,Ryan Au,Yanan Li,Yiheng Tong,Hong Shen
Angelica dahurica radix (ADR), the root of the botanical family Apiaceae (genus Angelica , species Angelica dahurica ( Hoffm .)), has been used to treat colitis in clinical practice. The immunomodulatory effects of ADR are attributed to its polysaccharides (RP). However, its mechanism of action has not been elucidated. In this study, RP's structure was determined through nuclear magnetic resonance analysis. Dextran sulfate sodium-induced colitis in mice was utilized to assess the therapeutic efficacy of RP, while experiments involving fecal microbiota transplantation (FMT) and antibiotic treatment were performed to investigate the contribution of gut microbiota to RP's protective function. Non-targeted metabolomics was utilized to identify potential targets for elucidating the underlying mechanisms. RP is likely composed of (→4)-α-D-Glcp-(1→ and →4)-α-D-Galp-(1→). It effectively alleviated DSS-induced colitis by restoring the balance of the gut microbial community, a finding validated through FMT and antibiotic intervention experiments. Imidazole propionate (ImP) emerged as a potential target for RP's efficacy in treating colitis, which inhibits the activation of peroxisome proliferator-activated receptor gamma (PPAR-γ). Our findings suggest that RP may confer protection against colitis by activating the PPAR-γ signaling pathway through alleviating the constraint imposed by ImP.
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JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY
·
2025
·
IF 2.4
Pan Gao,Yu Li,Yong Yang,Yuling Zheng,Jiaojiao Yin,Xinghe Zhang,Xingguo Wang
This study investigates the antioxidant interactions of γ-tocopherol, β-sitosterol, and ellagic acid in iron walnut oil within ethanol and ethyl acetate, assessing their impact on oxidative stability. In ethanol, γ-tocopherol and ellagic acid display initial synergistic effects, enhancing free radical scavenging beyond their individual capabilities. Conversely, γ-tocopherol and β-sitosterol show antagonistic effects, reducing their combined scavenging abilities. Kinetic analysis indicates ellagic acid's robust scavenging, generally outperforming combinations of antioxidants. Fourier-transform infrared spectroscopy revealed that solvent polarity significantly impacts hydrogen bonding interactions. Ethanol, with its higher polarity, promoted more extensive hydrogen bonding compared to ethyl acetate, which imposed constraints on such interactions due to its lower polarity. Notably, despite its poor solubility in ethyl acetate, ellagic acid exhibits enhanced synergy with γ-tocopherol, likely via electron transfer. These findings underscore the intricate dynamics of antioxidant interactions, further emphasizing the pivotal role of solvent polarity in modulating these interactions. These results indicated that solvent properties significantly influence antioxidant behavior, yet they also introduce novel insights specific to the iron walnut oil system.
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JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
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2018
·
IF 1.911
Xuebin Ma,Shuai Liu,Hejun Tang,Rong Yang,Bo Chi,Zhiwen Ye
Due to the syringeability of precursor solution and convenience of open surgical treatment, injectable hydrogels have gained growing attention in drug delivery application. For load-bearing tissue, the excellent mechanical property is an important requirement for delivery vehicles to resist external stress and loads. Herein, we prepared mechanically robust injectable hydrogels (HA/γ-PGA hydrogels for short) using methacrylate-functionalized hyaluronic acid and poly (γ-glutamic acid) via photopolymerization. The HA/γ-PGA hydrogels showed outstanding anti-compression ability and could suffer a more than 80% strain. Meanwhile, after 5 cycles of compression, HA/γ-PGA hydrogels could still recover quickly against external stress, showing excellent shape recovery capability. Moreover, the mechanical properties could be modulated easily by changing the molar ratio of HA to γ-PGA. The drug release behavior was also evaluated and the drug-loaded HA/γ-PGA hydrogels showed a weak burst release and sustained release behavior. Additionally, HA/γ-PGA hydrogels also exhibited superior biocompatibility. Therefore, HA/γ-PGA hydrogels have great potential as injectable drug carriers for load-bearing tissue application.
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Current Research in Food Science
·
2022
·
IF 6.269
Jinxin Che,Keqin Chen,Jaorao Song,Ying Tu,Okwong Oketch Reymick,Xiumei Chen,Nengguo Tao
Cinnamaldehyde (CA) is a promising antimicrobial agent for the preservation of fruits and vegetables due to its excellent antibacterial activity. The application is however, limited by its unstable and volatile properties. A biocompatible carbon dots hybrid γ-cyclodextrin-based metal organic framework (CD/MOF) was developed by the seed-mediated method to improve the encapsulation and sustained continuous release of CA. CD/MOF-0.5 exhibited a CA loading efficiency of 28.42% and a sustained release duration time of more than 15 days at 8 o C. The release kinetics results showed that the release behavior of CD/MOF-0.5 fitted well with the Korsmeyer–Peppas release kinetics model, indicating that its sustained release is mainly controlled by diffusion. Both the Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy analyses revealed that CD/MOF-0.5 and CA molecules were linked by hydrogen bonds. Due to the high sustained release performance, CA-loaded CD/MOF-0.5 considerably inhibited the growth of Escherichia coli , hence preventing the spoilage of fresh-cut cantaloupes. CD/MOF-0.5/CA treatment also maintained the qualities of the fresh-cut cantaloupes, prolonging their edibility to five days. This work provides a promising strategy for the prevention of spoilage in food industry.
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高影响因子
Journal of Materials Chemistry B
·
2013
·Vol. 1
·期 10
·1491-1500
·
IF 0
Zhi-Gang Wang,Gong Cheng,Yan-Lin Liu,Ji-Lin Zhang,De-Hui Sun,Jia-Zuan Ni
The multifunctional microspheres consisting of the magnetic γ-Fe2O3 core and the affinity REVO4 (RE = Sm, Dy, Ho) shell have been synthesized via the homogenous precipitation–calcination–ion exchange three-step synthetic route. Their morphologies, structures, surface properties, and magnetisms were characterized, respectively. SEM and TEM images indicate that they all have an average size of about 400 nm and very rough surfaces. The TEM images further reveal that the γ-Fe2O3@REVO4 microspheres are all core–shell structures and the REVO4 shells are about 55–60 nm in thickness. The XRD pattern analyses show that the magnetic γ-Fe2O3 cores belong to cubic structure and the REVO4 (RE = Sm, Dy, Ho) shells are composed of their corresponding tetragonal major phases. HRTEM images, FTIR spectra and EDS further demonstrate the formations of tetragonal REVO4 shells based on checkup of the corresponding lattice fringes, characteristic IR absorption peaks and element signals. Their potentials for selective capture, rapid separation, and convenient mass spectra (MS) labeling of the phosphopeptides from complex proteolytic digests are explored and evaluated for the first time. The experimental results show that the magnetic γ-Fe2O3@REVO4 core–shell structured microspheres have high selective affinity for the phosphopeptides. The trapped phosphopeptides can be rapidly isolated by an external magnetic field, and can be easily identified by characteristic MS signals from 80 Da mass losses in the mass spectra (MS). Additionally, the γ-Fe2O3@REVO4 affinity materials can be reused after recovery.
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PubMed
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Yanhe Wu,Yushuai Cheng,Zhengke Wang
To address the toxicity, weight, and environmental limitations of lead-based radiation shields, this research develops a lightweight water-based radiation attenuation coating via facile integration of core-shell structured Gd@Si and Bi@Si fillers into a waterborne polyurethane/polyvinyl alcohol matrix. The tetraethyl orthosilicate-modified core-shell design enables uniform dispersion of high atomic number fillers (up to 70 wt%) while enhancing interfacial photon scattering. At 1.5 mm thickness, this coating achieves 99.1 % X-ray attenuation efficiency at 31 keV, which is comparable to 0.25 mm lead, and a γ-ray mass attenuation coefficient of 0.1408 cm 2 /g at 662 keV, exceeding lead by 44 %. Simultaneously, the composite maintains robust mechanical properties (683.9 % elongation at 50 wt% loading) and thermal stability (264.9 °C onset decomposition temperature). With a density 78 % lower than lead, inherent hydrophobicity (97.5° contact angle), and adhesion to diverse substrates, this sprayable coating offers a scalable, eco-friendly solution for radiation protection in medical, nuclear, and aerospace applications.
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PROGRESS IN ORGANIC COATINGS
·
2022
·
IF 6.206
Xiaojie Li,Hui Shi,Kai Pan,Miao Dai,Wei Wei,Xiaoya Liu
Zinc-lithium (Zn-Li) alloys have attracted considerable attention as potential biodegradable orthopedic implant materials . However, the biocompatibility and antibacterial property need further improvement to meet the clinical requirements. In this study, poly(γ-glutamic acid)- g -dopamine/copper (γ-PGA- g -DA/Cu) hybrid coatings were fabricated on a Zn alloy to improve its biocompatibility and antibacterial performance. Corrosion analysis in simulated body fluid indicated that the γ-PGA- g -DA/Cu coatings afforded tunable degradation rates of Zn alloys. The cytotoxicity evaluation revealed that the presence of copper ions in the coatings could reduce the cytotoxicity problem caused by zinc ions and enhance the biocompatibility of Zn alloy. In vitro antibacterial tests exhibited that the antibacterial activity of Zn alloy enhanced due to the γ-PGA- g -DA/Cu coatings and the antibacterial performance of γ-PGA- g -DA/Cu coated samples increased with increasing copper content of the coatings. In summary, γ-PGA- g -DA/Cu coatings provide a feasible strategy to design Zn alloy implant materials with improved functional performance.
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