ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2021
·Vol. 28
·期 21
·26913-26922
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IF 4.223
Yang Kaiyan,Sun Zhiyi,Wang Luochun,Lou Ziyang
To utilize carbon source and decompose the petroleum hydrocarbon substances simultaneously, adding the electrolysis to ozonation (E + -Ozonation) was employed to deal with hazardous activated petroleum waste sludge (P-sludge). It was found that E + -Ozonation could accelerate the ozone utilization and hydroxyl radical (·OH) generation rate. Soluble chemical oxygen demand (SCOD) increased around 16.3 times than the control one (from 471 to 7700 mg/L). The potential carbon source, such as the short-chain carbon of acetate and propionate, increased from 50 to 1088 mg/L and from 27 to 614 mg/L respectively, and approximately accounted for a quarter of total SCOD. Total petroleum hydrocarbon (TPH) decomposition was observed with a much higher removal rate of 84.3% simultaneously, and the substances with the function group of C=C and C–C bonds decomposed greatly. The long- and medium-chain substances in TPH were converted into the short-chain substances (90% of C 28 –C 40 of hydrocarbons was removed, while C 10 –C 18 increased by 13.8%). E + -Ozonation process could be one of the promising methods for P-sludge decomposition through carbon source releasing and TPH removal. Graphical abstract
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JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
·
2020
·Vol. 100
·期 11
·4319-4328
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IF 2.614
Tengfei Zhan,Yunsheng Han,Chaohua Tang,Qingyu Zhao,Dandan Sun,Ying Li,Xueting Jia,Lingyun Zhou,Junmin Zhang
BACKGROUND The aim of this study was to investigate the metabolism of α -tocopherol derived from vitamin E-enriched transgenic maize (VER) and its effects on antioxidant and immune functions in broilers aged 1–42 days. A total of 360 1-day-old male broilers were randomly divided into three groups containing six replicates with 20 broilers per replicate. The negative control (NC) group and the positive control (PC) group were given non-GM maize and non-GM maize plus exogenous vitamin E (VE), respectively, and the VER group was given VER, replacing the non-GM maize given to the NC group. Between days 1 and 21 and days 22 and 42, VE levels were 4.38 and 4.63 mg kg −1 in the NC group, and 14.11 and 14.91 mg kg −1 in the PC and VER group, respectively. RESULTS The results showed that α -tocopherol from both VER and additives increased α -tocopherol transfer protein and cytochrome P450 concentrations. Serum α -tocopherol and α -tocopherylquinone levels of broilers in the PC and VER groups were also significantly higher than those in the NC group ( P < 0.05). Compared with the NC group, broilers in both groups that received α -tocopherol had reduced NF- κ B p65 concentrations, significantly decreased serum prostaglandin E 2 , interleukin-6, malondialdehyde, and hydrogen peroxide levels ( P < 0.05), and significantly increased glutathione, glutathione peroxidase, and total antioxidant capacity ( P < 0.05). CONCLUSION In summary, both VER and non-GM maize fortified with exogenous VE showed similar effects on broilers, indicating that the α -tocopherol in VER has sufficient biological activity. © 2020 Society of Chemical Industry
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FOOD HYDROCOLLOIDS
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2020
·
IF 7.053
Mohamed Eid,Remah Sobhy,Peiyuan Zhou,Xianling Wei,Di Wu,Bin Li
Hydrogel nanocomposites (HGNCs), with a hydrophobic inner hollows structure and a hydrophilic exterior, is often used to encapsulate the broadest range of guest molecules. Herein, we established a three-dimensional, nanocomposites, superabsorbent, malleable, and bioadhesive HGNCs via chemical crosslinker poly (ethylene glycol) diglycidyl ether (PEGDGE) to enhance the controlled release and bioavailability of Vitamin E (VE). β-cyclodextrin (β-CD) are integrated as multi-core units in the soy soluble polysaccharide (SSPS) polymer network in which the β-CD cavities act as carriers for (VE) by host-guest interaction. We have examined the detailed structures and morphology by FTIR, DSC , XRD, SEM, TEM , AFM , and CLSM. Overall, increasing the β-CD than SSPS in the reaction mixture (from 10 to 25%) led to enhance the crosslinking degree, improve the elastic behavior (G′>G″), increase the particle size (from 114.2 to 202.9 nm), and the hardness. Besides, decreasing the adhesiveness, pore size, and swelling. Our (HGNCs) did not rupture under compression up to 90% strain with (1.8 MPa) strength. The nanocomposites (1:1) exhibited less nanosized after pectinase and α-amylase hydrolysis (75 and 124 nm, respectively). Also, the (HGNCs) exhibited outstanding swelling-adsorption and sustained release (over 230 h) towards VE in vitro. It showed high encapsulation efficiency and loading capacity (79.10 and 16.04%, respectively). Additionally, the oral administration of VE-loaded HGNCs in rats resulted in a sustained increase of plasma VE levels over 12 h post-administration. The relative pharmacological bioavailability of VE was larger for VE-loaded HGNCs (reached to 7.5-fold increase) compared to free VE suspension. Keywords : Nanohydrogel; β-cyclodextrin; Soy soluble polysaccharide; Vitamin E; swelling; control release.
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International Journal of Nanomedicine
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2019
·
IF 4.471
Lijuan Liu,Lu Liu,Yin Li,Xiaoxin Huang,Donglian Gu,Bo Wei,Danke Su,Guanqiao Jin
Purpose: We developed a contrast agent for targeting E-selectin expression. We detected the agent using magnetic resonance imaging (MRI) in vivo in nude mice that had undergone nasopharyngeal carcinoma (NPC) metastasis.Methods: Sialyl Lewis X (sLeX) was conjugated with ultrasmall superparamagnetic iron oxide (USPIO) nanoparticles. Hydrodynamic size, polydispersity index, and ζ-potential of USPIO–polyethylene glycol (PEG) nanoparticles and USPIO-PEG-sLeX nanoparticles were measured. Component changes in nanoparticles of USPIO, USPIO-PEG, and USPIO-PEG-sLeX were analyzed by thermogravimetric analysis and Fourier-transform infrared spectroscopy. A model of NPC metastasis to inguinal lymph nodes in nude mice was used to investigate characteristics of the USPIO-PEG-sLeX nanoparticles in vivo. We investigated the ability of the T2* value, change in T2* value (ΔT2* value), and enhancement rate (ER) to assess accumulation of USPIO-PEG-sLeX nanoparticles quantitatively in mice of a metastasis group and control group. Four MRI scans were undertaken for each mouse. The first scan (t0) was done before administration of USPIO-PEG-sLeX nanoparticles (0.1 mL) via the tail vein. The other scans were carried out at 0 (t1), 1 (t2), and 2 hours (t3) postinjection. The mean optical density was used to reflect E-selectin expression.Results: sLeX was labeled onto USPIO successfully. In vivo, there were significant interactions between the groups and time for T2* values after administration of USPIO-PEG-sLeX nanoparticles. Six parameters (T2* at t2, ΔT2* at t1, ΔT2* at t2, ER at t1, ER at t2, and ER at t3) were correlated with the mean optical density.Conclusion: USPIO-PEG-sLeX nanoparticles can be used to assess E-selectin expression quantitatively. Use of such molecular probes could enable detection of early metastasis of NPC, more accurate staging, and treatment monitoring.
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3 Biotech
·
2018
·Vol. 8
·期 7
·1-9
·
IF 1.497
Huang Jian-Feng,Zhang Bo,Shen Zhen-Yang,Liu Zhi-Qiang,Zheng Yu-Guo
O -succinyl- l -homoserine (OSH) is a promising platform chemical for the production of C4 chemicals with huge market potential which can be produced by fermentation from glucose. To construct a strain capable of producing OSH with high yield, the metJ (encodes transcriptional repressor) and metI (encodes a subunit of dl -methionine transporter) were deleted in Escherichia coli W3110 to obtain a strain E. coli ∆JI. Then, overexpression of metL (encodes bifunctional aspartate kinase/homoserine dehydrogenase II) and inactivation of metB (encodes cystathionine γ-synthase) were implemented in one step, and the OSH titer of the resulting strain E. coli ∆JIB * Trc metL was dramatically increased to 7.30 g/L. The feedback regulation was further relieved by progressively overexpressing metA fbr (encodes homoserine O -succinyltransferase), yjeH (encodes l -methionine exporter), and thrA fbr (encodes bifunctional aspartate kinase/homoserine dehydrogenase I) to increase the metabolic flux from aspartate to OSH. The 100% rationally designed strain E. coli ∆JIB * Trc metL /pTrc- metA fbr -Trc- thrA fbr - yjeH produced 9.31 g/L OSH from 20 g/L glucose (0.466 g/g glucose) in batch fermentation, which represents the highest OSH yield from glucose reported to date. The culture profiles of the newly constructed strains were recorded to investigate their productive properties. The effects of l -methionine addition on the fermentation process of the optimal strain were also studied. Our results demonstrate that tuning the expression level of metL , inactivation of metB , and attenuation of feedback resistance of the crucial enzymes in the biosynthetic pathway are the key factors that impact the OSH production in E. coli .
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Green Processing and Synthesis
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2019
·Vol. 8
·期 1
·667-676
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IF 1.128
Dan Chen,Binglin Li,Bin Li,Xiaoli Zhang,Longhui Wei,Wenwen Zheng
Catalytic efficiency in synthesis of vitamin E succinate was dramatically increased via the preparation of robust catalyst and the improvement of reaction system. 4-dimethylaminopyridine (DMAP) was covalently immobilized on nano-SiO 2 to avoid the catalyst contamination of the product and permit the easy recycling of DMAP. Then, a hexane-acetone mixed solvent system was firstly introduced to replace the traditional single-solvent system, which was employed to improve the activity of immobilized DMAP derivative and the substrate solubility of the reaction system. The highest vitamin E succinate yield of 94% was achieved. In addition, the recyclability and stability of the immobilized DMAP derivative was excellent, the yield of vitamin E succinate had no obvious loss and remained 90% after recycling 20 times. The excellent results make this technology be a promising candidate for the industrial production of vitamin E succinate.
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CHINESE JOURNAL OF CATALYSIS
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2013
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IF 1.304
Yi Hu,Xiangjun Jiang,Suwen Wu,Ling Jiang,He Huang
Vitamin E succinate was synthesized by interfacial activated Candida rugosa lipase (CRL) encapsulated in sol-gel materials. The effects of various immobilization parameters were investigated. The optimum conditions were found to consist of n -propyltrimethoxysilane/tetraethoxysilane molar ratio = 1/1, water/silane molar ratio ( R value) = 20, lipase loading = 0.5 mg/ml sol, and PEG400 loading = 12 μl/ml sol. Compared with free enzymes, sol-gel encapsulated enzymes kept its activity of 70.58% and achieved 2.6-fold increased stability after 18 h incubation in phosphate buffer (0.025 mol/L, pH = 7.0) at 50 °C. Based on the interfacial characteristics of CRL, five kinds of surfactants were used for activation. The results demonstrate that olive oil was the most effective in activating CRL. The esterification activity of vitamin E succinate synthesis by interfacial activated CRL encapsulated in sol-gel materials reached up to 6.7-fold and 1.43-fold that of free enzyme and non-interfacial activated enzyme, respectively.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2014
·
IF 3.107
Dong-Mei Wang,Cheng-Chen Zhang,Qiang Zhang,Nusrat Shafiq,Gennaro Pescitelli,Deng-Wu Li,Jin-Ming Gao
Five new sesquiterpene polyol esters with a dihydro-β-agarofuran skeleton, designated as wightianines A–E (1–5), besides two known compounds, were isolated from the methanolic extract of the whole plant of the traditional herbal medicine Parnassia wightiana Wall. The structures of the isolated compounds were elucidated on the basis of spectroscopic analyses, including two-dimensional nuclear magnetic resonance techniques (correlation spectroscopy, heteronuclear multiple-quantum coherence, nuclear Overhauser effect spectrometry, and heteronuclear multiple-bond correlation) and electronic circular dichroism studies. The antifungal and insecticidal activities of five compounds were evaluated against several plant pathogenic fungi and armyworm larvae (Mythimna separata Walker). Among the test metabolites, compounds 2 and 7 both exhibited potent antifungal activity against the phytopathogenic fungus Cytospora sp. with minimum inhibitory concentration values of 0.78 μg/mL, which are equal to the two positive controls, hymexazol and carbendazim. However, no insecticidal activity of the test compounds was observed in the present study. Compounds 2 and 7 could be promising leads for developing new fungicides against agriculturally important fungus Cytospora sp.
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ELECTROCHIMICA ACTA
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2017
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IF 4.798
Yujuan Xu,Wu Lei,Juan Su,Jinjin Hu,Xiaodan Yu,Tong Zhou,Yun Yang,Daniel Mandler,Qingli Hao
A fast, ultrasensitive electrochemical sensing platform based on graphitic carbon nitride-electrochemically deposited-poly(3,4-ethylenedioxythiophene) (g-C 3 N 4 -E-PEDOT) composite was constructed by in-situ electropolymerization and applied for the quantitative determination of acetaminophen (AP). E-PEDOT was introduced as the conducting matrix for developing g-C 3 N 4 composite to complement the poor conductivity disadvantage of g-C 3 N 4 . The strong affinity and synergetic effect between g-C 3 N 4 and E-PEDOT, which were analyzed by PM6 computational calculation, highly improved the electron transfer property and remarkably enhanced the electrochemical catalytic activity of the composite. The g-C 3 N 4 -E-PEDOT modified glassy carbon electrode (GCE) demonstrated better electrocatalytic activity towards the oxidation of AP than bare, g-C 3 N 4 and E-PEDOT modified ones. Under the optimized conditions, the oxidation peak currents at the g-C 3 N 4 -E-PEDOT/GCE increased linearly in the concentration range of AP from 0.01 to 2 μM and 2–100 μM, and an ultra-low limit of detection (LOD) of 34.28 nM was obtained (S/N = 3). In addition, the g-C 3 N 4 -E-PEDOT/GCE was successfully applied for the AP determination in the clinical human serum, and also exhibited excellent selectivity, reproducibility and stability. Except the novel AP determination approach, moreover, this work provided a new electrochemical application angle of graphitic carbon nitride theoretically as well as experimentally.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Qing Luo,Chenyue Yan,Ruoteng Ma,Lei Dai,Wenjun Shu,Anum Asghar,Zhigang Jia,Xulong Zhu,Shun Yu
The development of multifunctional hydrogels, especially hydrogels with antibacterial and antioxidant properties, plays a crucial role in the effective healing of diabetic wounds. This work proposed a novel composite hydrogel with the oxidized gellan gum (O-GG) and hyaluronic acid (HA) as the hydrogel matrix, and the crosslinking was realized via the Ca 2+ . ε-polylysine/MnO 2 nanozymes (EM) offered antioxidant and antibacterial properties to the corresponding composite hydrogels. The results verified that the O-GG/HA@EM hydrogel exhibited excellent cytocompatibility and injectability. The CCK-8 data indicated that the proliferation rate of mouse fibroblasts reached 314.58 % after three days of coculture with the hydrogel. The hydrogel effectively alleviated oxidative stress and hypoxic microenvironments in wounds, inhibited bacterial infection, and promoted angiogenesis, thereby significantly accelerating the healing process of diabetic wounds. Data from a mouse diabetic wound model revealed that the wound closure rate in the sample group reached 92.4 % after 14 days. This composite hydrogel provides a novel and effective solution for the treatment of chronic diabetic wounds.
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ACS Applied Electronic Materials
·
2024
·
IF 4.3
Qiaoqiao Bai,Xin Liu,Xiaohu Shi,Ziwei Wang,Ziyi Wu,Qizhi Dong,Nan Liu,Tang Liu,Song Liu
With the rapid development of technologies, such as the Internet of Things and artificial intelligence, the flexible electronic skin (e-skin) that bridges the material and the physical world presents vast market potential. However, the development of cost-effective, multifunctional e-skin remains a formidable challenge. Herein, a dual-functional e-skin based on a microspinous MXene/PDMS composite film is prepared by using a low-cost natural template method. The e-skin has good performance, making it suitable for detecting small pressures and joint movements as well as high-quality electromyogram and electrocardiogram signals. The e-skin can monitor a variety of human motions and electrophysiological signals, positioning it as a promising tool in the areas of motion detection and health monitoring.
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Food Chemistry-X
·
2024
·
IF 6.5
Binchen Wang,Shaohua Dou,Shang Wang,Yi Wang,Sufang Zhang,Xinping Lin,Yingxi Chen,Chaofan Ji,Yiwei Dai,Liang Dong
Unsaturated aliphatic aldehyde oxidation plays a significant role in the deep oxidation of fatty acids to produce volatile chemicals. Exposing the oxidation process of unsaturated aliphatic aldehydes is crucial to completely comprehend how food flavor forms. In this study, thermal desorption cryo-trapping in conjunction with gas chromatography-mass spectrometry was used to examine the volatile profile of (E)-4-decenal during heating, and 32 volatile compounds in all were detected and identified. Meanwhile, density functional theory (DFT) calculations were used, and 43 reactions were obtained in the 24 pathways, which were summarized into the peroxide reaction mechanism (ROOH), the peroxyl radical reaction mechanism (ROO·) and the alkoxy radical reaction mechanism (RO·). Moreover, the priority of these three oxidative mechanisms was the RO· mechanism > ROOH mechanism > ROO· mechanism. Furthermore, the DFT results and experimental results agreed well, and the oxidative mechanism of (E)-4-decenal was finally illuminated.
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危险品化学品经营许可证（带存储）