Probiotics and Antimicrobial Proteins
·
2022
·Vol. 14
·期 4
·741-750
·
IF 5.265
Gao Xiaoxi,Zhang Yuhong,Mu Guangqing,Xu Yunpeng,Wang Xinmiao,Tuo Yanfeng,Qian Fang
The aim of the present study was to investigate the in vitro antioxidant potential of Bacillus coagulans T242. B. coagulans T242 showed better antioxidant activities, including the 2,2′-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) free radical scavenging ability, lipid peroxidation inhibiting ability and reducing ability, than those exerted by Lactobacillus rhamnosus GG (LGG). B. coagulans T242 positively regulated the expression of the nuclear factor erythroid 2-relatedfactor 2/Kelch-like ECH-associated protein-1 (Nrf2/Keap1) pathway-related proteins (Nrf2, Keap1, heine oxygenase-1 (HO-1)); increased antioxidant enzymes (glutathione peroxidase (GSH-Px), catalase (CAT), superoxide dismutase (SOD)); reduced the content of malondialdehyde (MDA) level; decreased the expression of inflammatory-related cytokines interleukin-6 (IL-6), interleukin-8 (IL-8), and tumor necrosis factor-α (TNF-α); and thus increased the survival rate in 2,2′-azobis (2-methylpropionamidine) dihydrochloride (AAPH)-damaged HT-29 cells. This study proved that B. coagulans T242 exerted antioxidative effects by quenching oxygen free radicals and activating the Nrf2 signaling pathway in HT-29 cells.
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PubMed
高影响因子
CELLULOSE
·
2022
·Vol. 29
·期 9
·5339-5358
·
IF 6.123
Liu Yansong,Zhao Wenjing,Zhang Jiayue,Ren Yuanlin,Liu Xiaohui,Qu Hongqiang
Inspired by the intrinsically flame-retardant alginate fiber, a novel eco-friendly, biomass-based flame retardant was developed to endow lyocell fabrics with excellent flame-retardant properties by using bio-material glycine, aspartic acid as raw materials. Furthermore, glycine and aspartic acid were converted into sodium carboxylate (glycine-Na and aspartate-Na), respectively. Then, lyocell fabric was respectively modified by glycine-Na and aspartic acid-Na to prepare flame retardant lyocell fabric (G-lyocell-Na and A-lyocell-Na). The combustion test result showed that the modified fabrics exhibited self-extinguishing characteristics and high char-forming ability. In addition, compared to the control sample, the peak of heat release rate (PHRR) of G-lyocell-Na and A-lyocell-Na reduced by 36.5% and 49.9%. TG-IR and Raman spectra results indicated that both the condensed and gas phase played the flame retardant role. The electron withdrawing effect of the Na + reduced the activation energy, promoted the pyran ring-opening reaction and reduced the decomposition temperature. Therefore, the flame retardant lyocell fabric decomposed and formed more char residue containing Na 2 CO 3 . The expanded char layer formed during combustion could effectively block the release of heat and the overflow of combustible gases, so that the modified lyocell fabric showed highly flame-retardant efficiency. In this work, a novel preparation strategy that can endow lyocell fabric with good flame retardant properties without traditional flame retardant elements such as P, Cl and Br was proposed, which was green, environment-friendly and in line with sustainable development. Graphic abstract
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Food and Bioprocess Technology
·
2022
·Vol. 15
·期 5
·1101-1114
·
IF 5.581
Javed Miral,Belwal Tarun,Ruyuan Zhang,Xu Yanqun,Li Li,Luo Zisheng
Camellia oleifera shells are a noteworthy by-product often considered as agricultural waste and discarded rather than efficiently used. The extraction of bioactive compounds from shells using green extraction process can be a better approach for waste valorization. Also, demand for novel and green extraction method is required to avoid organic solvents, high cost, and environmental problems. Nanobubbles (NBs) can be used for extraction purposes due to their high specific area and internal pressure. In this study, a novel method using nanobubbles (NBs) solution coupled with ultrasonication to extract phytochemicals from Camellia Oleifera shells (COSs) was first explored. The characterization was performed to measure the size, zeta potential, and surface tension of NBs stabilized by biosurfactant in this case rhamnolipid (Rh). The produced NBs were of size 100 nm, having a surface tension of 35.26 ± 0.31 mN/m −1 . Single-factor experiments were performed to determine the significant variables. The Box–Behnken design optimized the ultrasonic power, ultrasonic time, and surfactant concentration to maximize the phytochemicals extraction. NBs solution coupled with ultrasonication (US) leads to a higher extraction yield of total phenolic (34.42 mg of gallic acid equivalent per gram of dry weight (mg GAE/g DW)) and flavonoid content (23.36 mg of rutin equivalent per gram of dry weight (RE/g DW)), as compared to the conventional extraction method. In addition, in vitro antioxidant activity was also increased in NBs solution and NBs’ solution–US extract compared with the conventional solvent method. The morphological and microstructural changes under NBs solution and ultrasonication were also determined to provide a possible extraction mechanism. The present experiment provides a novel extraction method and an overall green perspective of agro and food waste valorization.
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JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2022
·Vol. 37
·期 2
·149-154
·
IF 1.271
Sun Jiyang,Li Yiqiu,Guo Xiangxin
Li/garnet/LiFePO 4 solid-state battery was fabricated. The cathode contains LiFePO 4 , Ketjen black, poly(vinylidene fluoride):LiTFSI polymer as active material, electric conductor and Li-ion conducting binder, respectively. Polyvinylpyrrolidone was added into the cathode to improve cathode/electrolyte interfacial performance. When combined with polyvinylpyrrolidone additive, poly(vinylidene fluoride):polyvinylpyrrol idone:LiTFSI blend forms, and the cathode/electrolyte interfacial resistance reduces from 10.7 kΩ to 3.2 kΩ. The Li/garnet/LiFePO 4 solid-state battery shows 80% capacity retention after 100 cycles at 30 °C and 0.05 C. This study offers a general strategy to improve cathode/electrolyte interfacial performance and may enable the practical application of solid-state Li-metal batteries.
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Bioresources and Bioprocessing
·
2022
·Vol. 9
·期 1
·1-15
·
IF 4.983
Cheng Guoqing,Ding Huili,Chen Guanglin,Shi Hongjie,Zhang Xu,Zhu Minglong,Tan Wensong
Sulfate-containing wastewater has a serious threat to the environment and human health. Microbial technology has great potential for the treatment of sulfate-containing wastewater. It was found that nano-photocatalysts could be used as extracellular electron donors to promote the growth and metabolic activity of non-photosynthetic microorganisms. However, nano-photocatalysts could also induce oxidative stress and damage cells. Therefore, the interaction mechanism between photosynthetic nanocatalysts and non-photosynthetic microorganisms is crucial to determine the regulatory strategies for microbial wastewater treatment technologies. In this paper, the mechanism and regulation strategy of cadmium sulfide nanoparticles (CdS NPs) on the growth of sulfate-reducing bacteria and the sulfate reduction process were investigated. The results showed that the sulfate reduction efficiency could be increased by 6.4% through CdS NPs under light conditions. However, the growth of Desulfovibrio desulfuricans C09 was seriously inhibited by 55% due to the oxidative stress induced by CdS NPs on cells. The biomass and sulfate reduction efficiency could be enhanced by 6.8% and 5.9%, respectively, through external addition of humic acid (HA). At the same time, the mechanism of the CdS NPs strengthening the sulfate reduction process by sulfate bacteria was also studied which can provide important theoretical guidance and technical support for the development of microbial technology combined with extracellular electron transfer (EET) for the treatment of sulfate-containing wastewater.
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高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2022
·Vol. 40
·期 5
·515-525
·
IF 3.815
Luo Hua-Bin,Pan Xiao-Ren,Yang Jing-Hui,Qi Xiao-Dong,Wang Yong
High-performance dielectric polymer composites have received increasing attention due to their important applications in the field of energy storage. The rational structural design of hybrid fillers can lead to a balance between high dielectric constant and insulation in composites. In this work, novel hybrid fillers were fabricated by in situ synthesizing one-dimensional polypyrrole nanowires (PPynws) on the two-dimensional molybdenum disulfide (MoS 2 ), which integrated the good ion polarization ability of PPynws and the high insulation and adjustable band gap of MoS 2 . Compared with the binary poly(vinylidene fluoride) (PVDF)/MoS 2 composites, the PVDF/MoS 2 -PPynws composites exhibited remarkably improved dielectric constant and breakdown strength, while the dielectric loss was still maintained at a low level. An optimal ternary composite with 1 wt% MoS 2 -PPynws showed a high dielectric constant (15@1kHz), suppressed dielectric loss (0.027@1kHz), and high breakdown strength (422.1 MV/m). PPynws inducing strong interfacial polarization and the highly insulated MoS 2 nanosheets extending the breakdown path mainly contributed to the synchronously enhanced dielectric constant and breakdown strength. This intriguing synthesis method of PVDF/MoS 2 -PPynws nanocomposite will open up new opportunities for fabricating nanostructured polymer composites to produce high dielectric materials.
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JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 16
·7778-7790
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IF 4.682
Zhao Haijia,Qu Jiakang,Li Xianyang,Zhao Zhuqing,Chen Xiang,Xie Hongwei,Yin Huayi
Advanced high-performance functional materials rely on their specific morphological structures designed by template method. However, the current template methods suffer from the complex template-removal process. The molten salts have an ability to dissolve some specific materials and could be easily removed by water. Thus, the molten salts could be employed as a not only solvent but also template. Herein, the Na 2 CO 3 –K 2 CO 3 and NaCl–KCl molten salts were employed as both solvents and templates to synthesize the carbonates (CaCO 3 , BaCO 3 , or SrCO 3 ) with diverse morphologies. And then the carbonates, which are soluble in molten salts and insoluble in water, were added into the high-temperature molten salt to form a homogeneous liquid phase. Subsequently, the molten salts templates can be easily removed in water after solidification. After removing the templates, the carbonates with fine particles and strip-shaped belts could be obtained in Na 2 CO 3 –K 2 CO 3 and NaCl–KCl molten salt, respectively, indicating that the different molten salts have diverse template effects. Overall, molten salts are a promising soft and water-soluble template for materials’ structural design.
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METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2022
·Vol. 53
·期 4
·2227-2238
·
IF 2.872
Yue Hong-Rui,Liu Jian-Xing,Cheng Gong-Jin,Xue Xiang-Xin,Zhang Wei-Jun
The material accumulation during roasting in the practical production causes the hypoxia of the internal materials, leading to the relatively lower vanadium recovery than that in theoretical studies. This work aims to solve the problem of material hypoxia through the Na 2 O 2 -briquetting roasting route. The vanadium slag and Na 2 O 2 powders were mixed, briquetted, and roasted at various parameters. The generated phases and their distributions were analyzed using X-ray diffraction, Fourier transform infrared spectroscopy, and electron probe microanalysis. The analyzing results showed that Fe 2 O 3 , Fe 3 O 4 , Mg 0.165 Mn 0.835 O, CaTiO 3 , and Na 3 VO 4 were generated during roasting. The solid–solid reaction between V 2 O 5 and Na 2 O was described using the vacancy-mediated diffusion mechanism. Na + (or V 5+ ), in the Na 2 O (or V 2 O 5 ) layer, jumped and diffused through the Na + (or V 5+ ) vacancies (in the Na 3 VO 4 layer) to the Na 3 VO 4 /V 2 O 5 (or Na 3 VO 4 /Na 2 O) interface. Na + (or V 5+ ) reacted with V 2 O 5 (or Na 2 O) and O 2 decomposed from Na 2 O 2 or transported from the air to generate Na 3 VO 4 . The roasted mixture was leached in an aqueous solution to study the effects of the roasting variables on the vanadium leaching recovery. The vanadium leaching recovery was very sensitive to the roasting variables, it showed very complicated relationships with the Na/V molar ratio, temperature, time, and briquetting pressure. The maximum vanadium leaching recovery of 95.57 pct was achieved when the Na/V molar ratio, temperature, time, and pressure were optimized as 3/1, 850 °C, 2.5 hours, and 5 MPa, respectively. The leaching solution containing vanadium was processed via precipitation and calcination to gather vanadium. The obtained compound was identified as V 2 O 5 with a purity of 96.84 pct, based on the high consistency of diffraction peaks between the present work and that of the joint committee on powder diffraction standards.
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Nano-Micro Letters
·
2022
·Vol. 14
·期 1
·1-13
·
IF 23.655
Jiang Meifang,Mu Pengzhou,Zhang Huanrui,Dong Tiantian,Tang Ben,Qiu Huayu,Chen Zhou,Cui Guanglei
The double-network binder shows excellent adhesive and self-healing abilities, which help suppress electrode volume expansion and stabilize the electrode interface upon cycling.
This binder induces a Li 3 N/LiF-rich solid electrolyte interface layer, which can suppress continuous electrolyte decomposition.
Superior electrochemical performance can be achieved in Si/Li half cells and LiNi 0.8 Co 0.1 Mn 0.1 O 2 /Si full cells, even with a high loading of Si electrode.
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高影响因子
CHEMICAL PAPERS
·
2022
·Vol. 76
·期 7
·4379-4392
·
IF 2.146
Zhang Huixian,Hu Xizhou,Xia Hong,Zhou Youxiang,Peng Lijun,Wu Jianyuan,Peng Xitian
Phenoxy carboxylic acid herbicides (PCAs) are widely used in agricultural production. However, due to their potential threat to human health, it is necessary to develop efficient analysis method for monitoring PCA concentration in environment and food samples. Based on dispersive micro-solid phase extraction (D-μ-SPE) with amine-functionalized metal–organic framework MIL-101(Fe)-NH 2 , a selective, sensitive, and cost-efficient method was proposed for the extraction of PCAs from environmental water and rice samples in this study. From the perspective of adsorption kinetics and isotherms, interaction mechanisms between MIL-101(Fe)-NH 2 and PCAs were investigated. Key parameters of D-μ-SPE procedure including adsorbent dosage, solution pH, ionic strength, eluting solution, and washing solutions were optimized. Using of small amount of MIL-101(Fe)-NH 2 could achieve desirable extraction effect due to its large surface area and multiple interactions with PCAs. Under the optimized D-μ-SPE conditions, calibration curves of 8 PCAs were linear within a concentration range of 0.05–5 ng/mL for water samples ( r 2 > 0.9898) and 0.5–50 ng/g for rice samples ( r 2 > 0.9879). Limits of detection of water and rice samples were as low as 0.004–0.008 ng/mL and 0.05–0.1 ng/g, respectively. The recoveries of 8 PCAs ranged from 83.0 to 109.3%. Both inter- and intra-day relative standard deviations were less than 10.3%. Our proposed method was successfully employed in actual environmental water and rice samples.
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2022
·Vol. 128
·期 4
·1-8
·
IF 2.983
Chen Lintao,Li He,Ling Luting,Guo Jiazhuang,Shen Haixia,Wang Cai-Feng,Chen Su
We report the in situ synthesis and interesting optical properties of graphene oxide–CdTe (GO–CdTe) nanocomposites, as well as their potential application in solar cells. By doping GO during the synthesis process of CdTe quantum dots (QDs), the as-prepared GO–CdTe nanocomposites have layered structure and CdTe QDs are well preserved on the layer with uniform distribution and no aggregation. The effects of different experimental conditions on the optical properties of GO–CdTe nanocomposite are investigated. Interestingly, the colors of GO–CdTe nanocomposite solutions under daylight are similar to their fluorescence color observed under ultraviolet (UV) light, distinct from those of pure CdTe QDs and GO/CdTe nanocomposites prepared by direct mixing of GO and CdTe QDs. In addition, we demonstrate the application of GO–CdTe nanocomposites for sensitized solar cells, which show enhanced photoelectric performance. Our findings may provide new insight into optical properties of QDs coupled with carbon nanomaterials.
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CELLULOSE
·
2022
·Vol. 29
·期 4
·2497-2511
·
IF 6.123
Xu Dezhong,Cheng Yanan,Wu Shuai,Zou Qiuxia,Mondal Ajoy Kanti,Ning Dengwen,Huang Fang
In this work, tunicate cellulose nanocrystals (tCNCs) were extracted from the tunicate by bleaching and acid hydrolysis. They were used as filler in the preparation of sodium alginate-based enteric capsules. The addition of tCNCs with a high aspect ratio (65) rendered the enteric capsule excellent physical properties. Compared with the control sample, when the addition of tCNCs were 10% (wt), the water contact angle of the capsule was enhanced by 46.0%, the opacity was increased by 356.8%, the maximum tensile stress was increased by 142.6%, the modulus of elasticity was increased by 240.3%, and the elongation at break was increased by 133.8%. In the in vitro degradation experiments, the capsule hardly degraded in the gastric environment (pH 1.2), while in the intestinal environment (pH 6.8), the degradation became slower with the increase of tCNC content, which was consistent with the properties of the enteric capsule. This research developed a new direction for the application of tCNCs in the pharmaceutical material productions. Graphical abstract
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危险品化学品经营许可证（带存储）