Journal of Food Measurement and Characterization
·
2022
·Vol. 16
·期 2
·1383-1394
·
IF 3.006
Zhang Daojiu,Zhang Yujie,Gao Yeying,Lin Yiying,Ding Chao,Zhang Jiwei,Liu Qingdai
In the present study, garlic essential oil (GEO) was embedded in lecithin (LT) and β -sitosterol ( β -S). Liposomes (L-S-G) were then prepared by injecting ethanol injection to improve bioavailability of GEO (51%) andthe particle size, encapsulation efficiency, and stability of L-S-G were analyzed. The stability of L-S-G samples under different storage conditions such as light and dark was also evaluated. Results of the present study showed that the encapsulation efficiency of the liposomes was 81% and the average particle size of the embedded L-S-G was 375.8 nm. The particle size of liposomes stored for 15 days under light and dark conditions were 529 nm and 473 nm, respectively. In addition, the findings from the gastrointestinal experiment in the current study showed that the bioavailability of L-S-G was 51%. The long-term bacteriostatic experiments of the present study revealed that the garlic essence liposomes effectively inhibited growth of Listeria monocytogenes in beef, chicken, and pork as compared with garlic essential oil. Graphical abstract
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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2022
·Vol. 331
·期 2
·673-681
·
IF 1.754
Xie Kangjun,Hua Rong,Dong Zhen,Wang Nan,Zhang Manman,Qi Wei,Zhai Maolin,Yang Jun,Zhao Long
Selective adsorption of TcO 4 − from radioactive waste is important for the nuclear industry. In this work, three 1-vinyl-3 benzylimidazole chloride modified mesoporous silica bearing different pore volumes and specific surface areas were synthesized using radiation grafting. The effect of pore structure on the adsorption properties of the three adsorbents were studied. The adsorbents with bigger specific surface area and pore volume were conducive to ReO 4 − adsorption in terms of both adsorption rate and capacity. The prepared adsorbents displayed good radiation resistance under gamma rays in dry or wet conditions, and they could selectively remove ReO 4 − from simulated Hanford wastewater in column experiments.
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CELLULOSE
·
2022
·Vol. 29
·期 2
·1017-1034
·
IF 6.123
Sun Lijian,Qian Xueren,An Xianhui
Cellulose-based bioplastics with degradability and remarkable mechanical performance have recently attracted increasing attention. As a high-performance material, cellulose-based bioplastics have a strong potential to replace synthetic plastic substrates in many applications. However, its poor shielding performance to UV light limit its application. In this work, transparent and UV-blocking MIL-68(In)-NH 2 @cellulose bioplastic (M(In)CBP) sheets are fabricated via a featured processing method, i.e., cellulose liquefaction, rapid solidification, in-situ synthesis and hot-press drying. The as-obtained functional bioplastic sheet (M(In)CBP1) exhibits high visible-light transparence (74.7% a 600 nm) and the existence of MIL-68(In)-NH 2 allows superior UV-blocking ability (below 400 nm, transmittance was under 4%). The M(In)CBP sheets show high photostability even after continuous UV irradiation (365 nm) for over 12 h. The superior UV-shielding performance is attributed to the uniform distribution and the high UV absorbance of MIL-68(In)-NH 2 in M(In)CBP sheets. High resistance to penetration by aqueous/nonaqueous liquids was proved. Moreover, the M(In)CBP sheets also show excellent mechanical properties and thermal stability. The present work designed a UV-blocking bioplastic constructed from cellulose and MIL-68(In)-NH 2 , which is potential candidates to replace synthetic plastics in many advanced applications such as a UV protection layer for electronic products, or useful as packaging materials to prevent food spoilage. Graphical abstract
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GOLD BULLETIN
·
2022
·Vol. 55
·期 1
·31-40
·
IF 1.564
Wang Cuiping,Zhang Huan,Wang Chunrong
A simple template-free method was developed for the fabrication of fibers whose surfaces were covered by a three-dimensional interconnected network of Au nanostructures (3D-NW AuNSs) without additional stabilizer. The EDS and XPS measurements confirmed the metallic nature of the formed 3D gold nanowire networks on the fiber surface. The morphology of these 3D-NW AuNSs can be controlled by the experimental parameters, such as reaction time, roughness of the glass fiber surface, HAuCl 4 , and sodium citrate concentration. The 3D gold nanowire networks showed excellent uniformity. Additionally, the nanofiber was used to accurately and reliably detect methyl red (MR), crystal violet (CV), and acridine orange (AO), which can be detected as low as 1, 10, and 5 μg/L, respectively. Since the proposed strategy is simple, cost-effective, and reproducible for the mass production of network-like gold film–covered nanofiber, it is expected to play an important role in the development of trace analytical devices.
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ECOTOXICOLOGY
·
2022
·Vol. 31
·期 3
·503-515
·
IF 2.935
Hu Xuemei,Peng Kuan,Chen Yijun,Chen Xiaoyong,Liu Shuguang,Zhao Yunlin,Wu Yaohui,Xu Zhenggang
Photocatalysts have been widely prepared and used in wastewater treatment. Although the influence of photocatalyst application on survival and activity of organisms has been examined, its impact on composition and diversity of microbial community is not fully understood. In this study, the impact of photocatalyst g-C 3 N 4 (Graphitic carbon nitride) on microbial communities in riverbed sediments polluted by antibiotic tetracycline (TC) was investigated. The sediment samples collected from the Xiangjiang River of China were exposed to different concentrations of TC, g-C 3 N 4 and TC/g-C 3 N 4 and the bacterial community were analyzed by Illumina sequencing. The results showed that the dominant bacterial phyla were Acidobacteriota, Proteobacteria, Actinobacteriota , and Chloroflexi in the study site. When compared to the control treatments, the application of TC, g-C 3 N 4 and TC/g-C 3 N 4 exhibited distinguishable effects on bacterial community structure in sediments. The presence of TC had greater influence on bacterial composition, while g-C 3 N 4 and TC/g-C 3 N 4 had less influence on bacteria. The diversity and richness of microorganisms in sediment increased under g-C 3 N 4 application and reached the highest values when g-C 3 N 4 was 75 mg/kg. The photocatalyst g-C 3 N 4 restored bacterial community diversity affected by TC, reduced the TC residues in aquatic environment, and eliminated the side effects of TC application in sediments. Our study indicated that g-C 3 N 4 was an environmentally friendly photocatalyst with lightly negative effects on microbial community in riverbed sediments, and could be used for effective remediation of TC-contaminated environments.
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PubMed
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2022
·Vol. 102
·期 2
·400-411
·
IF 2.606
Yue Wenda,Liang Jun,Wang Honghai,Zhang Yu,Li Chunli,Su Weiyi
In the entrapment of enzymes by sol-gel method, the special procedures for obtaining the unique structure of xerogel are sometimes destructive to enzymes, while the internal structure of xerogels is easily broken. To solve the above problems, we present an economical, bio-friendly procedure for the entrapment of Candida antarctica lipase B in silica xerogel. In this procedure, an encapsulation-structured enzyme-carrying silica xerogel was produced by controlling the evaporation rate of the solvent at ambient pressure during drying, while tetramethoxysilane and methyltrimethoxysilane were used as the co-precursors. The xerogel synthesis was modified and optimized for improving the stability and reusability of the enzyme, while the xerogel characteristic structure was preserved. Moreover, the effects of the co-precursors amount on the mechanical strength, pore structure, hydrophobicity, enzyme loading, and enzyme stability of the enzyme-carrying silica xerogels were systematically investigated. And the best performance was observed at the co-precursors content of 30.28 wt%. Finally, the catalytic performance of the enzyme-carrying silica xerogels on the transesterification of n -butanol with ethyl acetate was demonstrated.
Graphical abstract
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 29
·44794-44805
·
IF 5.19
Wu Mingda,Lu Linghong,Zhou Tao,Ma Yi,Weng Zhengsong
Calcium and magnesium ions usually exist in natural water. When Cd 2+ is removed from water by adsorption, it will be inhibited by these two ions. Titanate nanotubes (TNTs) have an effective adsorption capacity for Cd 2+ due to extraordinary ion exchange property. However, TNTs also adsorb Ca 2+ and Mg 2+ in water. In this study, carbon-modified TNT (TNT/C) and TNT/C further treated with acid (TNT/HC) were synthesized by hydrothermal synthesis. The transmission electron microscope (TEM) images show that TNT/C or TNT/HC still keep nanotube morphology. The experimental results show the order of adsorption amount to Cd 2+ is TNT (171.56 mg/g) > TNT/C (166 mg/g) > TNT/HC (159.88 mg/g) when there is no Ca 2+ or Mg 2+ . But when there is 0.1 M Ca 2+ or Mg 2+ in the water, the order of Cd 2+ adsorption capacity becomes TNT/HC (44.28, 49.04 mg/g) > TNT/C (58.84, 69.32 mg/g) > TNT (65.52, 70.6 mg/g). It indicates that the surface carbon modification can alleviate the hindrance of Ca 2+ or Mg 2+ to Cd 2+ removal. This is because the carbon on the surface of TNT captured part of Ca 2+ or Mg 2+ ; it made more Cd 2+ be successfully absorbed by TNT through ion exchange. This mechanism was confirmed by the X-ray photoelectron spectroscopy (XPS) spectra analysis. The results of this paper can provide ideas for the adsorption and removal of Cd 2+ in water in the presence of Ca 2+ or Mg 2+ .
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Journal of Food Measurement and Characterization
·
2022
·Vol. 16
·期 2
·1754-1767
·
IF 3.006
Jing Yongshuai,Zhang Yuwei,Li Pengyue,Zhang Hao,Cheng Wenjing,Zhang Yameng,Zheng Yuguang,Wu Lanfang,Zhang Danshen
The polysaccharides of Salvia miltiorrhiza (SMP) were prepared through water-extraction and alcohol-precipitation method optimized by employing the response surface methodology. Furthermore, the structural characteristics and activities of SMP as well as its three derivatives (SMP-S, SMP-Fe and SMP-Se) were analyzed. SMP was composed of galacturonic acid, glucose, galactose and arabinose and the molecular weights were 3.79 × 10 6 Da, 3.17 × 10 4 Da and 693.68 Da. The sulfur content of SMP-S was 13.53%, the iron content of SMP-Fe was 26.12% and the content of selenium in SMP-Se was 0.984 mg/g. Their surface morphology, meso-structure and thermal stability were determined by scanning electron microscope, transmission electron microscope and thermogravimetric analyzer, respectively. Further, the antioxidant and immunomodulatory activities of SMPs were studied. The study found that three modified polysaccharides not only exhibited higher antioxidant activity, but also higher immunomodulatory activity compared to SMP. This lays a theoretical foundation for the development of Salvia miltiorrhiza polysaccharide-related foods.
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Communications Materials
·
2022
·Vol. 3
·期 1
·1-9
·
IF 0
Wang Shuaipeng,Chen Yong,Sun Yonghui,Qin Yuexiu,Zhang Hui,Yu Xiaoyong,Liu Yu
Slide-ring materials with movable cross-links have received attention due to their excellent mechanical properties. However, due to the poor solubility of polyrotaxane and low synthesis efficiency, their applications are hindered. Here, we use hydroxypropyl-modified α-cyclodextrin (Hy-α-CD) and Acrylamide-PEG 20000 -Acrylamide (ACA-PEG 20000 -ACA) to construct a polypseudorotaxane with good water solubility. Through photo-initiated polymerization of polypseudorotaxane with acrylamide in-situ, the capped polyrotaxane was easily obtained and further cross-linked by 1,4-butanediol diglycidyl ether in sodium hydroxide solution to form a slide-ring supramolecular hydrogel. The hydrogel can be stretched to 25.4 times its original length, which recovers rapidly on unloading, and the addition of Ca 2+ ions during crosslinking enhances ionic conductivity. The Ca 2+ -doped hydrogels are used to prepare wearable strain sensors for monitoring human motion.
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Signal Transduction and Targeted Therapy
·
2022
·Vol. 7
·期 1
·1-10
·
IF 38.104
Wu Jiajing,Nie Jianhui,Zhang Li,Song Hao,An Yimeng,Liang Ziteng,Yang Jing,Ding Ruxia,Liu Shuo,Li Qianqian,Li Tao,Cui Zhimin,Zhang Mengyi,He Peng,Wang Youchun,Qu Xiaowang,Hu Zhongyu,Wang Qihui,Huang Weijin
Emerging SARS-CoV-2 variants are the most serious problem for COVID-19 prophylaxis and treatment. To determine whether the SARS-CoV-2 vaccine strain should be updated following variant emergence like seasonal flu vaccine, the changed degree on antigenicity of SARS-CoV-2 variants and H3N2 flu vaccine strains was compared. The neutralization activities of Alpha, Beta and Gamma variants’ spike protein-immunized sera were analysed against the eight current epidemic variants and 20 possible variants combining the top 10 prevalent RBD mutations based on the Delta variant, which were constructed using pseudotyped viruses. Meanwhile, the neutralization activities of convalescent sera and current inactivated and recombinant protein vaccine-elicited sera were also examined against all possible Delta variants. Eight HA protein-expressing DNAs elicited-animal sera were also tested against eight pseudotyped viruses of H3N2 flu vaccine strains from 2011–2019. Our results indicate that the antigenicity changes of possible Delta variants were mostly within four folds, whereas the antigenicity changes among different H3N2 vaccine strains were approximately 10–100-fold. Structural analysis of the antigenic characterization of the SARS-CoV-2 and H3N2 mutations supports the neutralization results. This study indicates that the antigenicity changes of the current SARS-CoV-2 may not be sufficient to require replacement of the current vaccine strain.
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 6
·3237-3249
·
IF 2.779
Wang Siyu,Guo Jiaxiong,Lin Zhidong,Liu Liming,Hui Yuchong,Zhang Xiaowen
A series of very small grain Au/SnO 2 composites were synthesized by a facile hydrothermal method. The microstructure of the Au/SnO 2 composites were characterized by X-ray diffraction, scanning electron microscope, transmission electron microscopy, and nitrogen adsorption–desorption experiment. The composites were composed of 20–30 nm spherical nanoparticles, which are hierarchical structure composed of 8 nm Au cores and 5 nm SnO 2 nanograins. The composites were porous material with large specific surface area. The sensors based on the Au/SnO 2 composites showed high sensitivities and selectivity to n -butanol at low working temperature with fast response. Among these sensors, the 1.5 wt% Au/SnO 2 -based sensor shows the highest response (2662.8) to 100 ppm n -butanol with the response time of 35 s at 80 °C. The excellent low-temperature gas-sensing properties of the Au/SnO 2 sensors can be ascribed to the synergetic effect of high surface energy of small SnO 2 nanograins and catalysis of gold nanoparticles. Our study demonstrates that controlling the grain size of SnO 2 and Au nanoparticle-assisted gas sensing are effective methods to improve the sensing properties of SnO 2 at low working temperature. The 1.5 wt% Au/SnO 2 composite is a potential low-temperature gas-sensing material for n -butanol detection.
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2022
·Vol. 128
·期 2
·1-11
·
IF 2.983
Liu Xi,Xu Haoyan,Li Yifei,Jing Mingxing,Wang Wensheng,Li Zhaoxin,Zhang Pengtao,Sun Zhuangzhi
In recent years, the application of flexible electronic devices such as soft sensors and soft actuators has been limited, due to issues with their greater electromechanical performance and self-healing ability. Ionic electroactive polymers (iEAPs) have excellent development potential in this field because of its faster response speed and better tensile properties. Here, we proposed a stretchable, self-healing ionic electroactive polymer (PAST-iEAPs), which contains cassava starch to generate many hydrogen bonds in PAST-iEAPs. We introduced a variety of conductive materials for modification. The results showed that the modified PAST-iEAPs had good tensile strength (about 1.45 MPa), and their self-healing efficiency was about 92% after 24 h of self-healing at room temperature. Especially, PAST-iEAPs had an excellent electromechanical performance. Under 10 V DC voltage, the maximum deflection angle (128°) and maximum output force (38.326 mN) were 1.8 times and 2.1 times higher than those without modification. This work illustrated that PAST-iEAPs with low cost, easy preparation, and good biocompatibility have great potential in the research fields of soft robots and biomedical devices.
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