CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Han Feng,Ping Liu,Xu Guo,Junliang Li,Yifan Sun,Shunge Wu,Ruohai Hu,Zhi Liu,Helei Tian,Yuanming Ma,Caixia Liu,Houzhu Huang,Fei Teng,Xinyue Tang,Austin Yang,Aiguo Song,Xiaoming Yang,Ying Huang
Flexible resistive sensors based on crack structures have been widely studied in the field of electronic skin and health monitoring. However, it is still a challenge to develop resistive sensors with strong interface bonding forces due to the problem that the sensitive layer of traditional cracked sensors falls off easily. This paper reports a new type of graphene-based resistive sensor, which uses modified poly(sodium 4-phenylene sulfonate) and graphene nanosheets to prepare a highly conductive, fragile, film sensitive layer. Siloxane at the end of modified poly(sodium 4-phenylene sulfonate) is used to enhance the interface between the sensitive layer and the silicone rubber layer to prepare a flexible resistive sensor with a crack structure. The sensor has a high sensitivity (gauge factor up to 21980.28) and a high response speed (∼65 ms), with an effective working range of 0–4.7 % strain. The sensor has been successfully applied to human physiological signal detection. The neural network algorithm successfully predicted the corresponding blood pressure based on the pulse wave signal detected by the sensor. The average error of systolic blood pressure and diastolic blood pressure was 0.79 and 0.42 mmHg, and the error of ± 5 mmHg accounted for 91.2 % and 94.3 % of the total, respectively. The error value passed the Association for the Advancement of Medical Instrumentation standard, and reached the Class A standard of British Hypertension Society.
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Journal of Materials Research and Technology-JMR&T
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2023
·
IF 6.4
Shangqiao Wu,Yichun Liu,Jie Yu,Qi Zhao,Jingmei Tao,Zhong Wu,Jinfeng Zhang,Yunying Fan,Yanzhang Liu,Caiju Li,Jianhong Yi
In this paper, inhomogeneous copper matrix composite with carbon nanotube reinforced copper foam (CNTs/Cu f ) as the three-dimensional (3-D) skeleton is designed to overcome the paradox between strength and ductility or conductivity. The open cell composite foams with uniformly embedded CNTs are filled with dense copper phase in the foam pores by spark plasma sintering (SPS) to form the inhomogeneous composites. The inhomogeneous composite reinforced with CNTs/Cu f shows a combination of high electrical conductivity (93.4% IACS), tensile strength (366.7 MPa), and fracture elongation (31.78%) with a quite low CNTs content (0.2414 vol%). In addition, the polarization curves and AC impedance (EIS) tests show that the best corrosion resistance is achieved with the CNTs content of 0.2414 vol%, and the corrosion rate is reduced by 71.9% and 49.1% compared with the Cu and Cu f ®Cu samples, respectively.
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JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2023
·Vol. 98
·期 9
·2122-2135
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IF 3.4
Chong Liang,Wei Zhao,Mingyu Cui,Dingkai Wang,Xutang Liu,Linyang Dong,Xianyong Wei
BACKGROUND In view of the low economic benefit for direct utilization of lignite, the ionic liquid 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) has been used to extract Inner Mongolia lignite (IML) in order to efficiently separate lignite, develop the technology for clean and value-added utilization of lignite, and alleviate the enormous pressure of ecological environment pollution. Subsequently, sequential extraction of IML by [Bmim]Cl/ N -methyl-2-pyrrolidone (NMP), acetonitrile and ether was employed to separate group components in lignite. RESULTS Functional group results show that hydrogen bonds of IML including OH ether, COOH dimers and SH N, and weak covalent bonds such as C al O, C al N, C al S and S S, can be cleaved by [Bmim]Cl. Extraction experiments using mixed solvents of [Bmim]Cl and NMP or water indicate that the synergistic effect of NMP and [Bmim]Cl plays a vital role in increasing lignite extraction yield, but for water an opposite effect is observed. Importantly, the group components extracted by [Bmim]Cl/NMP and consecutively by acetonitrile and ether show a clear difference in composition according to gas chromatography–mass spectrometry. Specifically, polycyclic aromatic hydrocarbons and long-chain alkanes are present in the acetonitrile phase, with relative content of 8% and 88%, respectively, while most of esters, aliphatic acids and phenols are dissolved in ether with proportions of 35.24%, 35.53% and 16.57%, respectively. CONCLUSION This work demonstrates that sequential extraction of lignite by [Bmim]Cl/NMP, acetonitrile and ether may provide new insights for the separation of group components and clean utilization of lignite in industry. © 2023 Society of Chemical Industry (SCI).
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Zonghan Wang,Deyang Li,Xiaoyang Liu,Min Zhang,Pengfei Chu,Beiwei Zhu,Donghong Liu,Dayong Zhou
Epigallocatechin-3-gallate (EGCG) exhibits excellent cross-linking effects of myofibrillar proteins, it is prone to self-aggregation, causing excessive cross-linking and moisture loss of gels, which limits its application as a food additive in surimi products. Here, through combination γ-cyclodextrin and EGCG into one inclusion complex, we achieved proper usage of EGCG in shrimp surimi products: elevating both water holding capability and texture properties (hardness, chewiness and resilience). Moreover, the mechanism behind excellent performance was elucidated: as texture modifiers, the complexes improved gel network integrity through intermolecular interactions and moderated disulfide bonds; and as water retainer agents, the complexes promoted transformation of nitrogen in proteins towards the form of protonated amino, facilitating the occurrence of hydration. Furthermore, the inclusion complexes brought a higher phenolic retention within products in contrast with direct addition of EGCG. This work may propose novel insights for the usage of polyphenols as additives in surimi-based products.
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FOOD CHEMISTRY
·
2022
·
IF 9.231
Xiya Zhang,Zizhe Li,Yexuan Mao,Meng Dang,Xianqing Huang,Zhanhui Wang,Huijuan Yang,Yuchen Bai,Huahai Zhang
Production of high-affinity and specific antibodies to small molecules with molecular weight (MW) lower than 200 Da is challenging. Here, we designed a novel hapten, named hapten H6, for the detection of 3-methyl-quinoxaline-2-carboxylic acid (MQCA, MW of 189 Da), a residual marker of olaquindox, one of important veterinary antibiotics. The hapten H6 maintained all structural features of MQCA, especially in mulliken atomic charge distribution. Then, a monoclonal antibody (mAb) named 8C9 was obtained with an IC 50 value of 0.2 µg/L, yielding a 15.5- to 88.5-fold improvement compared to previously prepared specific antibodies against MQCA. In addition, mAb 8C9 exhibited ignorable cross-reactivity with other structural analogs. Finally, a highly sensitive and specific indirect competitive ELISA based on mAb 8C9 was developed for the detection of MQCA in swine muscle and liver samples with limit of detection values of 0.04 µg/kg and 0.09 µg/kg, respectively.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Caimei Lu,Rongrong Song,Junhui Wang,Kun Liu,Tian Fu,Rui Tang,Luying Jiang,Zhangfa Tong,Hanbing Zhang
Effective removal of hazardous and low biodegradable benzophenone-3 (BP-3) has been a challenging problem. In this study, a new Vis/TiO 2 /PDS/Cu 2+ system was constructed to evaluate the catalytic performance of BP-3 during the co-induced ligand-to-metal charge transfer (LMCT) process by Cu 2+ , PDS and TiO 2 . Under visible light irradiation, trace Cu 2+ efficiently triggering LMCT process from PDS to TiO 2 via Cu–O bridging effect was firstly reported. In this LMCT-mediated photocatalysis process, Cu 2+ was not only involved in the formation of visible-light responsive TiO 2 -Cu-PDS complexes but also inhibited the back electron transfer and promoted PDS activation by accelerating the electron transfer from the conductive band (CB) of TiO 2 to PDS via Cu 2+ /Cu + cycle. Compared with BP–3 removal in Cu 2+ /PDS system (18%) and Vis/TiO 2 system (48%), that in Vis/TiO 2 /Cu 2+ system (58%) and Vis/TiO 2 /PDS system (54%) exhibited a slight improvement. It was worth noting that BP-3 removal in Vis/Cu 2+ /TiO 2 /PDS system reached 91% within 30 min and the corresponding TOC removal was up to 76% in 120 min, which proved that the significantly enhancement of BP-3 degradation in Vis/Cu 2+ /TiO 2 /PDS system. Meanwhile, this system could maintain efficient catalytic performance in a wide pH range from 3 to 8. The formation of an interfacial charge transfer complex of Cu-PDS on TiO 2 , and the boosted generation of O 2 – , SO 4 − and HO radicals over the Vis/Cu 2+ /TiO 2 /PDS system were confirmed. Notably, visible light excited Cu-PDS complexes to distribute electrons to TiO 2 (CB) via Cu–O bridge action, thereby inducing the enhanced visible-light activity of TiO 2 and achieving superior catalytic performance for various pollutants in Vis/Cu 2+ /TiO 2 /PDS system. Furthermore, enhanced activation mechanisms of TiO 2 and PDS by visible-light induced LMCT process were proposed in detail. Hydroxylation, demethylation and ring-opening dominated BP-3 degradation, and the weakened toxicity of BP-3 in Vis/TiO 2 /PDS/Cu 2+ system was confirmed via the distinct increase of E.coli colonies numbers at the introduction of intermediates. This study offers new insights into LMCT activation approach and broadens the understanding of the ability of Cu 2+ to be applied in photo-activated persulfate-based advanced oxidation processes for environmental remediation.
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ACS Sensors
·
2023
·
IF 8.9
Siqi Xie,Cheng Zhao,Jiabin Shen,Jing Wei,Haiquan Liu,Yingjie Pan,Yong Zhao,Yongheng Zhu
Listeria monocytogenes, which is abundant in environment, can lead to many kinds of serious illnesses and even death. Nowadays, indirectly detecting the metabolite biomarker of L. monocytogenes, 3-hydroxy-2-butanone, has been verified to be an effective way to evaluate the contamination of L. monocytogenes. However, this detection approach is still limited by sensitivity, selectivity, and ppb-level detection limit. Herein, low-cost and highly sensitive and selective 3-hydroxy-2-butanone sensors have been proposed based on the bimetallic AuPd decorated hierarchical flower-like WO3 nanospheres. Notably, the 1.0 wt % AuPd-WO3 based sensors displayed the highest sensitivity (Ra/Rg = 84 @ 1 ppm) at 250 °C. In addition, the sensors showed outstanding selectivity, rapid response/recovery (8/4 s @ 10 ppm), and low detection limit (100 ppb). Furthermore, the evaluation of L. monocytogenes with high sensitivity and specificity has been achieved using 1.0 wt % AuPd-WO3 based sensors. Such a marvelous sensing performance benefits from the synergistic effect of bimetallic AuPd nanoparticles, which lead to thicker electron depletion layer and increased adsorbed oxygen species. Meanwhile, the unique hierarchical nanostructure of the flower-like WO3 nanospheres benefits the gas-sensing performance. The AuPd-WO3 nanosphere-based sensors exhibit a particular and highly selective method to detect 3-hydroxy-2-butanone, foreseeing a feasible route for the rapid and nondestructive evaluation of foodborne pathogens.
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Food & Function
·
2023
·Vol. 14
·期 14
·6707-6717
·
IF 6.1
Shuai Zhang,Mei Deng,Ruifen Zhang,Xuchao Jia,Fei Huang,Dong Zhao,Lihong Dong,Jianwei Chi,Zhida Sun,Qin Ma,Mingwei Zhang
Black rice (Oryza sativa L.) is a great source of anthocyanins and dietary fiber and possesses various health-promoting properties. The modulating effect of insoluble dietary fiber (IDF) from black rice on the fermentation of cyanidin-3-O-glucoside (Cy3G) in an in vitro human colonic model, together with the possible microbiota-mediated mechanisms, was investigated. The combined Cy3G and IDF fermentation can promote the biotransformation of Cy3G into phenolic compounds such as cyanidin and protocatechuic acid with stronger antioxidant activities and increase the total production of SCFAs during the fermentation of Cy3G. 16S rRNA sequencing analysis revealed that the addition of IDF modulated the microbiota structure and bloomed Bacteroidota and Prevotellaceae-related genera, which were positively correlated with metabolites of Cy3G, thus potentially regulating the microbial metabolism of Cy3G. The work is of great significance for elucidating the material basis of the health benefits of black rice.
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Polymers
·
2022
·Vol. 14
·期 17
·3661
·
IF 4.967
Sai Zou,Li Dang,Ping Li,Jiachen Zhu,Shengjie Lan,Donghai Zhu
To alleviate the safety hazards associated with the use of epoxy resin (EP), a multifunctional filler was designed. This study firstly combines the superior mechanical properties of magnesium borate rods (MBR) with the excellent smoke suppression and flame-retardant characteristics of layered double hydroxide (LDH). H2PO4−intercalated LDH (LDHP) was coated on the MBR surface to obtain inorganic composite particles MBR@LDHP. Subsequently, MBR@LDHP was modified with 3-aminopropyltriethoxysilane (APES) to obtain organic-inorganic composite particles MBR@LDHP-APES. Eventually, the hybrid particles were added to EP to prepare the composite materials. Thereafter, the morphology, composition, and structure of MBR@LDHP-APES were characterized utilizing scanning electron microscopy (SEM), Fourier transform infrared (FTIR), and X-ray diffraction (XRD). The results indicated the successful preparation of MBR@LDHP-APES, after which we investigated the effects of MBR@LDHP-APES on the smoke suppression, flame retardancy, and mechanical characteristics of EP. As observed, the EP composites containing 7.5 wt% MBR@LDHP-APES exhibited superior smoke suppression and flame retardancy abilities. The limiting oxygen index reached 33.5%, which is 36.73% greater than pure EP, and the lowest values of total heat and smoke release were observed for the composite materials. In addition, the mechanical properties test revealed that MBR@LDHP-APES considerably enhanced the tensile strength as well as the flexural strength of the composites. Furthermore, mechanistic studies suggested that the barrier effect of MBR, endothermic decomposition of LDHP, and the synergistic effect of LDHP and APES contributed essentially to the smoke suppression and flame-retardant properties of the material. The findings of this research point to a potential method for enhancing the EP’s ability to suppress smoke and flames while enhancing its mechanical properties.Keywords:epoxy resin;magnesium borate rod;layered double hydroxide;composites;flame retardant
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JOURNAL OF DAIRY SCIENCE
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2022
·
IF 4.225
Zihao Liu,Kun Wang,Xuemei Nan,Liang Yang,Yue Wang,Fan Zhang,Meng Cai,Yiguang Zhao,Benhai Xiong
ABSTRACT The compound 3-nitrooxypropanol (3-NOP) is a promising methane inhibitor, which performs well in inhibiting methane emission and does not affect animal feed intake and digestibility. However, it causes a significant increase in hydrogen production while suppressing methane emission, resulting in a waste of feed energy. Vitamin B 12 is a key factor in the propionate production pathway and thus plays an important role in regulating the hydrogen utilization pathway. In this study, the effects of 3-NOP combined with vitamin B 12 supplementation on rumen fermentation and microbial compositional structure in dairy cattle were investigated by simulating rumen fermentation in vitro. Experiments were performed using a 2 × 2-factorial design: two 3-NOP levels (0 or 2 mg/g dry matter) and 2 vitamin B 12 levels (0 or 2 mg/g dry matter). Three experiments were performed, each consisting of 4 treatments, 4 replicates, and 4 blanks containing only inoculum. The combined supplementation of 3-NOP and vitamin B 12 reduced methane emission by 12% without affecting dry matter digestibility. The combined addition of 3-NOP and vitamin B 12 significantly increased the concentration of propionate and reduced the concentration of acetate and the acetate to propionate ratio. At the bacterial level, 3-NOP increased the relative abundances of Christensenellaceae_R-7_group and Lachnospiraceae_NK3A20_group . Vitamin B 12 increased the relative abundances of unclassified_f__Prevotellaceae and Prevotellaceae_UCG-003 and decreased the relative abundance of Lachnospiraceae_NK3A20_group . At the archaeal level, the combination of 3-NOP and vitamin B 12 increased the relative abundances of Methanobrevibacter_ sp._ Abm4 , OTU1125, and OTU95 and decreased the relative abundances of uncultured_methanogenic_archaeon_g__Methanobrevibacter , OTU1147, OTU1056, and OTU55. The results indicated that 3-NOP combined with vitamin B 12 could alleviate rumen hydrogen emission and enhance the inhibition of methane emission compared with 3-NOP alone.
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ELECTROANALYSIS
·
2022
·Vol. 35
·期 3
·e202200279
·
IF 3.077
Yuxue Chen,Yunxiu Sun,Yanyan Niu,Baoli Wang,Zejun Zhang,Lina Zeng,Lin Li,Wei Sun
As a typical plant hormone, indole-3-acetic acid (IAA) can regulate the biological activities including division, growth and differentiation of plant cells. In this paper, a MXene and multi-walled carbon nanotubes composite was prepared by self-assembly procedure, which was modified on screen-printed electrode (SPE) to construct a wireless portable electrochemical sensor. Electrochemical investigations of IAA were studied by cyclic voltammetry and an irreversible oxidation process could be observed. The excellent electroanalytical method of IAA was realized on the modified SPE with the detection range as 0.05–125.0 μmol/L and the detection limit as 16.7 nmol/L. The sensor was used for IAA content analysis in different part of pea seedlings with satisfactory results.
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FOOD CHEMISTRY
·
2022
·
IF 9.231
Ming Nie,Lu Wang,Shengmin Lu,Yangguang Wang,Meiyu Zheng,Zhongxiang Fang
The protective effects of three amino acids ( l -phenylalanine, l -tryptophan and l -methionine) on the stability of bayberry anthocyanins were investigated. The anthocyanin stability under constant illumination (5000 Lux, 50 Hz) or in the presence of ascorbic acid were evaluated by degradation kinetic parameters, and the interaction between l -methionine and cyanidin-3-O-glucoside (C3G) in a model beverage system was analyzed using Fourier transform infrared spectroscopy, 1H nuclear magnetic resonance, X-ray diffraction, molecular docking, and molecular dynamics simulation. Results indicated that the three amino acids significantly reduced the degradation rate of bayberry anthocyanins (p < 0.05), with the most effect by l -methionine. l -methionine could bind to C3G via hydrogen bonds and Van der Waals forces. This study suggested that l -methionine could well protect anthocyanin against degradation in the aqueous solution and have the potential to be used as a co-pigment to improve the sensory property and extend the shelf life of anthocyanin rich berry products.
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