摘要：
This study reports the synthesis of Er-doped, Mn-doped, and Er, Mn co-doped monoclinic BiVO4 photocatalysts via a facile one-pot hydrothermal method. Er6%Mn2%/BiVO4 exhibited a larger specific surface area, bigger pore volume, and smaller average pore size compared to pure BiVO4 and single-doped BiVO4. The co-doping of Er3+ and Mn2+ ions resulted in lattice distortion and crystal particle size reduction of BiVO4, and generated a new impurity level at the bottom of the conduction band, narrowing the band gap and widening the absorption edge of visible light, thus improving the separation efficiency of photogenerated electron-hole pairs. Photocatalytic experiments on rhodamine B showed that Er6%Mn2%/BiVO4 achieved a degradation efficiency of 97.8% under visible light irradiation (lambda >420 nm) within 100 min, which is higher than those of BiVO4, Er-6%/BiVO4, and Mn-6%/BiVO4. The kinetic rate constant (0.0312 min(-1)) of Er6%Mn2%/BiVO4 was 1.3, 2.2, and 4.7 times higher than those of Er-6%/BiVO4, Mn-6%/BiVO4, and BiVO4, respectively. The study also identified <middle dot>O-2(-) and h(+) as the predominant active species involved in the photocatalytic degradation of rhodamine B and demonstrated the excellent stability of Er6%Mn2%/BiVO4 for five cycles of photodegradation experiment. This work highlights that Er6%Mn2%/BiVO4 has great potential as a candidate for treating organic pollutants in water.
摘要：
Two quantitative structure-property relationship (QSPR) models of hindered phenolic antioxidants in lubricating oils were established to help guide the molecular structure design of antioxidants. Firstly, stepwise regression (SWR) was used to filter out essential molecular descriptors without autocorrelation, including electronic, topological, spatial, and structural descriptors, and multiple linear regression (MLR) was used to construct QSPR models based on the screened variables. The two models are statistically sound, with R2 values of 0.942 and 0.941, respectively. The models' reliability was verified by the frontier molecular orbital energy gaps of the antioxidants. A hindered phenolic additive was designed based on the models. Its antioxidant property is calculated to be 20.9% and 11.0% higher than that of typical commercial antioxidants methyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate and 2,2 '-methylenebis(6-tert-butyl-4-methylphenol), respectively. The structure-property relationship of hindered phenolic antioxidants in lubricating oil obtained by computer-assisted analysis can not only predict the antioxidant properties of existing hindered phenolic additives but also provide theoretical basis and data support for the design or modification of lubricating oil additives with higher antioxidant properties.
作者机构：
[Cheng, Yahong] College of Medicine and Health Science, Wuhan Polytechnic University,No.68, Xuefu South Road,Wuhan,Hubei 430023,PR China;[Huang, Puxin; Zhang, Yiyuan] Wuhan University School of Pharmaceutical Sciences, Wuhan University,No.185 Donghu Road,Wuhan,Hubei 430072,PR China;[Cheng, Qingzhou] College of Medicine and Health Science, Wuhan Polytechnic University,No.68, Xuefu South Road,Wuhan,Hubei 430023,PR China. Electronic address: 01235@whpu.edu.cn;[Ding, Hong] Wuhan University School of Pharmaceutical Sciences, Wuhan University,No.185 Donghu Road,Wuhan,Hubei 430072,PR China. Electronic address: dinghong1106@whu.edu.cn
通讯机构：
[Qingzhou Cheng] C;[Hong Ding] W;Wuhan University School of Pharmaceutical Sciences, Wuhan University, No.185 Donghu Road, Wuhan, Hubei 430072, PR China<&wdkj&>College of Medicine and Health Science, Wuhan Polytechnic University, No.68, Xuefu South Road, Wuhan, Hubei 430023, PR China
摘要：
Epilepsy represents a prevalent neurological disorder in the population, and the existing antiepileptic drugs (AEDs) often fail to adequately control seizures. Inflammation is recognized as a pivotal factor in the pathophysiology of epilepsy. Luteolin, a natural flavonoid extract, possesses anti-inflammatory properties and exhibits promising neuroprotective activity. Nevertheless, the precise molecular mechanisms underlying the antiepileptic effects of luteolin remain elusive. In this study, we established a rat model of epilepsy using pentylenetetrazole (PTZ) to induce seizures. A series of behavioral experiments were conducted to assess behavioral abilities and cognitive function. Histological techniques, including HE staining, Nissl staining, and TUNEL staining, were employed to assess hippocampal neuronal damage. Additionally, Western blotting, RT-qPCR, and ELISA were utilized to analyze the expression levels of proteins involved in the TLR4/IκBα/NF-κB signaling pathway, transcription levels of apoptotic factors, and levels of inflammatory cytokines, respectively. Luteolin exhibited a dose-dependent reduction in seizure severity, prolonged the latency period of seizures, and shortened seizure duration. Furthermore, luteolin prevented hippocampal neuronal damage in PTZ-induced epileptic rats and partially restored behavioral function and learning and memory abilities. Lastly, PTZ kindling activated the TLR4/IκBα/NF-κB pathway, leading to elevated levels of the cytokines TNF-α, IL-6 and IL-1β, which were attenuated by luteolin. Luteolin exerted anticonvulsant and neuroprotective activities in the PTZ-induced epileptic model. Its mechanism was associated with the inhibition of the TLR4/IκBα/NF-κB pathway, alleviating the immune-inflammatory response in the post-epileptic hippocampus.
摘要：
This study utilises the transfer matrix method (TMM) to address the acoustic characteristics of multilayered cylindrical shells lined with porous materials. The TMM theoretical model for the sound transmission loss of composite cylindrical shells with internal porous materials is derived by establishing transfer matrices for the air/composite material interface, composite material/foam interface, foam/air interface and boundary interfaces. The accuracy of the TMM model is validated through a comparison and analysis with experimental results. Building upon this, the impact of porous foam material parameters and types on the structural sound transmission loss is discussed. The results indicate that the use of TMM accurately reflects the acoustic performance of composite structures. Additionally, this model allows for the determination of the influence patterns of porous foam material parameters and types on the acoustic performance of composite structures. In the frequency range of 100-10,000 Hz, the sound transmission loss of the melamine foam-lined composite structure increases with the increase in flow resistance and porosity and the decrease of the tortuosity factor. The use of the porous lining material significantly enhances the structural sound insulation performance.
摘要：
Due to their large surface area and pore volume, three-dimensional covalent organic frameworks (3D COFs) have emerged as competitive porous materials. However, structural dynamic behavior, often observed in imine-linked 3D COFs, could potentially unlock their potential application in gas storage. Herein, we showed how a pre-locked linker strategy introduces breaking dynamic behavior in 3D COFs. A predesigned planar linker-based 3,8-diamino-6-phenylphenanthridine (DPP) was prepared to produce non-dynamic 3D JUC-595, as the benzylideneamine moiety in DPP locked the linker flexibility and restricted the molecular bond rotation of the imine linkages. Upon solvent inclusion and release, the PXRD profile of JUC-595 remained intake, while JUC-594 with a flexible benzidine linker experienced crystal transformation due to framework contraction-expansion. As a result, the activated JUC-595 achieved higher surface areas (754 m2 g-1) than that of JUC-594 (548 m2 g-1). Furthermore, improved CO2 and CH4 storages were also seen in JUC-595 compared with JUC-594. Impressively, JUC-595 recorded a high normalized H2 storage capacity that surpassed other reported high-surface area 3D COFs. This works shows important insights on manipulating the structural properties of 3D COF to tune gas storage performance.
摘要：
This study explores the influence of various ultrasound treatment parameters and microwave drying parameters on the quality and drying characteristics of rice. The rice was treated in an ultrasound water bath (200W) for 30 min, 40 min, and 50 min, followed by microwave drying (210W) for 10 min. The influence of ultrasound treatment time on the moisture content variation of rice was found to be significant through correlation analysis. The time required for the 50 -min ultrasound treatment to reach the safe moisture level (15 %) was approximately 20 % shorter than the time required for the 30 -min ultrasound treatment. Due to the combined ultrasoundmicrowave treatment, changes occur in the constituents of rice (Starch gelatinization, Maillard reaction, etc.), and the variations in rice quality can be reflected by the changes in CIE Lab color parameters. The differences in characteristic peaks of Fourier Transform Infrared Spectroscopy (FTIR) can reflect the variations in flavor and aroma of rice, as well as the significant disruption of the ordered structure of starch molecules. Additionally, response surface experiments based on Box-Behnken design were conducted to obtain the optimal conditions for ultrasound-microwave combined treatment (240W, 46min, 3min). Moreover, ultrasound-microwave combined treatment leads to a significant reduction in rice hardness and an increase in elasticity.
作者：
Ming Cheng;Ye Tao;Chunwei Wang;Ao Li;Ming Cheng Ming Cheng Ming Cheng;...
期刊：
Journal of the Science of Food and Agriculture,2024年:- ISSN：0022-5142
通讯作者：
Ao Li<&wdkj&>Ao Li Ao Li Ao Li
作者机构：
Department of Food Science and Pharmaceutics, Zhejiang Ocean University, Zhoushan, China;Department of Food Science and Technology, Wuhan Polytechnic University, Wuhan, China;Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, China;Hubei Key Laboratory of Natural Products Research and Development, College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang, China;[Ming Cheng; Ye Tao; Ming Cheng Ming Cheng Ming Cheng; Ye Tao Ye Tao Ye Tao] Department of Food Science and Pharmaceutics, Zhejiang Ocean University, Zhoushan, China<&wdkj&>Department of Food Science and Technology, Wuhan Polytechnic University, Wuhan, China
通讯机构：
[Ao Li; Ao Li Ao Li Ao Li] D;Department of Food Science and Technology, Wuhan Polytechnic University, Wuhan, China<&wdkj&>Hubei Key Laboratory of Natural Products Research and Development, College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang, China
关键词：
Curcumin;emulsion;green tea polysaccharide conjugates;soybean protein isolate
摘要：
Tea processing often generates significant waste, resulting in resource inefficiency. However, extracting green tea polysaccharide conjugate (gTPC) from this waste has shown promising bioactivity. Previous studies have confirmed the emulsifying properties of gTPC. Yet, its use as an emulsifier is limited due to its requirement for high surface activity. The findings revealed that a 0.40 wt% soy protein isolate (SPI) and 0.50 wt% gTPC conjugate required 300 degrees C for complete decomposition, demonstrating the highest stability among other ratios. The Pickering emulsion, using a 0.30 wt% emulsifier ratio, exhibited exceptional stability. Moreover, it showed remarkable zeta potential and particle size stability under stressful conditions (temperature, pH and metal ions). Additionally, it effectively protected curcumin from adverse pH, light and temperature effects, with a retention rate of over 74.00%. These results highlight the gTPC/SPI combination as an effective stabiliser, offering new prospects for gTPC development and utilisation. gTPC and SPI complexes (gTPC/SPI) were prepared and characterised. gTPC/SPI had stronger emulsifying ability than that of the two alone. In emulsions, gTPC/SPI content was low (0.30 wt%) and oil content was high (60 wt%). gTPC/SPI emulsions carried curcumin and protected it in stressed environment. image
摘要：
Our previous study revealed that green tea polysaccharide conjugate (gTPC) has emulsion effect, but its emulsifying ability is weak. In order to improve the emulsification ability of gTPC, gTPC and bovine serum albumin (BSA) were combined to form five different mass proportions of the TPC/BSA (TB) complex: TPC/BSA: 5:1, 5:2, 5:3, 5:4, and 5:5 w/w. We observed that the 5:5 w/w TB emulsion was more hydrophobic and surface-active. Furthermore, the emulsions prepared using 50.00wt% medium-chain triglycerides exhibited the best stability. In addition, the TB emulsion exhibited stability in adverse environments of pH, salt, and heat; in particular, under salt conditions, no significant changes were observed in zeta potential. Subsequently, in vitro simulated digestion experiments were performed to investigate the use of TB emulsions for β-carotene encapsulation. We observed that the encapsulation efficiency for β-carotene was approximately 90.0%; it was subsequently released in the intestine.
作者机构：
[Cao, Jie; Xu, Feng; Wang, Li-Na; Zhou, Xian; Zhang, Wei-wei; Ye, Jia-Bao] Yangtze Univ, Coll Hort & Gardening, Jingzhou, Peoples R China.;[Cheng, Shuiyuan; Liu, Xiao-Meng] Wuhan Polytech Univ, Natl R&D Ctr Se Rich Agr Prod Proc Technol, Sch Modern Ind Selenium Sci & Engn, Wuhan 430048, Peoples R China.;[Xu, Feng; Xu, F] Yangtze Univ, Coll Hort & Gardening, Jingzhou 434025, Hubei, Peoples R China.
通讯机构：
[Xu, F ] Y;Yangtze Univ, Coll Hort & Gardening, Jingzhou 434025, Hubei, Peoples R China.
摘要：
4-Coumarate-CoA ligase (4CL) gene plays vital roles in plant growth and development, especially the regulation of lignin metabolism and flavonoid synthesis. To investigate the potential function of 4CL in the lignin biosynthesis of Ginkgo biloba, this study identified two 4CL genes, Gb4CL1 and Gb4CL2, from G. biloba genome. Based on the phylogenetic tree analysis, Gb4CL1 and Gb4CL2 protein were classified into Class I, which has been confirmed to be involved in lignin biosynthesis. Therefore, it can be inferred that these two genes may also participate in lignin metabolism. The tissue-specific expression patterns of these two genes revealed that Gb4CL1 was highly expressed in microstrobilus, whereas Gb4CL2 was abundant in immature leaves. The onion transient expression assay indicated that Gb4CL1 was predominantly localized in the nucleus, indicating its potential involvement in nuclear functions, while Gb4CL2 was observed in the cell wall, suggesting its role in cell wall-related processes. Phytohormone response analysis revealed that the expression of both genes was upregulated in response to indole acetic acid, while methyl jasmonate suppressed it, gibberellin exhibited opposite effects on these genes. Furthermore, Gb4CL1 and Gb4CL2 expressed in all tissues containing lignin that showed a positive correlation with lignin content. Thus, these findings suggest that Gb4CL1 and Gb4CL2 are likely involved in lignin biosynthesis. Gb4CL1 and Gb4CL2 target proteins were successfully induced in Escherichia coli BL21 with molecular weights of 85.5 and 89.2kDa, proving the integrity of target proteins. Our findings provided a basis for revealing that Gb4CL participated in lignin synthesis in G. biloba.
摘要：
The production and sales of electric vehicle lithium-ion batteries (EV LIB) have experienced rapid growth in the past decade, resulting in an extensive and intricate supply chain network (SCN). The SCNs orchestrated by different focal firms are interdependent due to the joint suppliers and customers. This interdependence, coupled with geographical segmentation, introduces vulnerability to the global EV LIB SCN. Focal firms need management insights from the multiplexity of the global EV LIB SCN to address the potential vulnerability. This investigation utilizes the empirical data regarding the supplier-buyer relationships of the top six EV LIB manufacturers in 2020 to construct the multilayered EV LIB SCN. Then, a focal firm-specific analysis is conducted to explore the multiplexity of the global EV LIB SCN, including identifying the influential firms, measuring the structure of SCNs led by different focal firms, and distinguishing the dependence and discrepancies of different focal firms' SCNs. Furthermore, an SCN vulnerability (SCNV) index was designed to assess the vulnerability of such a multilayered SCN in two disruption scenarios, i.e., single-country blockade and intercountry blockade. The structural analysis can assist focal firms in allocating vulnerability-coping resources more effectively. Besides, the assessment of SCNV can assist managers in identifying potential risk sources beyond their own SCNs.
摘要：
The use of microalgae-bacteria consortia (MBC) for wastewater treatment has garnered attention as their interactions impart greater environmental adaptability and stability compared with that obtained by only microalgae or bacteria use, thereby improving the efficiency of pollutant removal and bio-product productivity. Additionally, the value-added bio-products produced via biorefineries can improve economic competitiveness and environmental sustainability. Therefore, this review focuses on the interaction between microalgae and bacteria that leads to nutrient exchange, gene transfer and signal transduction to comprehensively understand the interaction mechanisms underlying their strong adaptability. In addition, it includes recent research in which MBC has been efficiently used to treat various wastewater. Moreover, the review summarizes the use of MBC-produced biomass in a biorefining context to produce biofuel, biomaterial, high-value bio-products and bio-fertilizer. Overall, more effort is needed to identify the symbiotic mechanism in MBC to provide a foundation for circular bio-economy and environmentally friendly development programmes.
摘要：
In the realm of practical problem-solving, multi-objective optimisation problems with redundant variables and indefinite objective functions (MOPRVIF) are becoming increasingly prevalent. MOPRVIF involve determining the optimal decision variables that optimise multiple objectives, leveraging the relational data of a set of variables and multiple objectives. For these problems, this paper focuses on the following two issues: one is the demand for a unified computational model to solve this problem; the other is how to improve the algorithm's deep intelligent search capability. In this regard, this paper designs a dual data-driven multi-objective optimisation method. The method used consisted of four parts: elimination of redundant variables (ERV), objective function construction (OFC), selection evolution operator (SEO), and multi-objective evolutionary algorithm (MOEA). MOEA was the main focus of the method. ERV is data preparation and variable selection according to multiple objectives. OFC involves constructing the relationship model between variables and objectives, and a high-accuracy model is important for guaranteeing reliable results. Furthermore, SEO can adjust the evolution operator during a deep search. This is an important guarantee for deep, intelligent search. MOEA combined OFC and SEO to form the final solution algorithm-Dual Data Driven Multi-Objective Evolutionary Algorithm (DDMOEA). DDMOEA was explored using two different disciplinary problems of drug compound optimisation and wild blueberry cultivation and benchmarks were selected. The first two problem domains are distinct. The first problem is more complex than the second; however, both encompass redundant variables and indefinite objective functions. Benchmarks are utilised independently to gauge the profound intelligent search capability. The experiments affirm that the dual data -driven optimization approach proposed in this paper is effective, practical, and scalable.
摘要：
Four typical forest types in Sygera Mountain, namely, Pinus armandii (PA), Picea likiangensis var. linzhiensis (PLL), Abies georgei var. smithii (AGS), and Juniperus saltuaria (JS) were considered using methods such as analysis of variance and stoichiometry. Effects of changes of nutrient content and stoichiometric ratio of various organs of arbor plants were evaluated. Compared with global plant nutrients, this study area had lower N and P contents. The growth of the Juniperus saltuaria forest was jointly restricted by N and P, and as the environmental gradient decreased, the growth of the other three forest types changed from N and P joint restrictions to N restrictions. The distribution order of element content in various organs among different forest types was consistent as follows: leaf>branch>root>trunk. There was a strong domestication reaction between N and P contents. This led to a significantly higher C/N ratio of the square branch Berlin compared to the other three forest types, while the C/P and N/P ratios were opposite. This may be due to the "optimal allocation principle" of nutrients in various organs under different environmental conditions. The nutrient allocation patterns of plant organs in different forest types were not the same, which reflects the differences in life strategies and nutrient utilization among different forest species.
期刊：
IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY-TRANSACTIONS OF CIVIL ENGINEERING,2024年:1-12 ISSN：2228-6160
通讯作者：
Gang Zeng
作者机构：
[Caihong Zhang] School of Civil Engineering, Nanjing Forestry University, Nanjing, China;[Jinwei Qiu] Department of Civil and Environmental Engineering, Changjiang River Scientific Research Institute, Wuhan, China;[Gang Zeng] School of Civil Engineering and Architecture, Hubei University of Arts and Science, Xiangyang, China;[Yiqie Dong; Haijun Lu] School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan, China;[Guanghua Cai] School of Civil Engineering, Nanjing Forestry University, Nanjing, China<&wdkj&>Department of Civil and Environmental Engineering, Changjiang River Scientific Research Institute, Wuhan, China
通讯机构：
[Gang Zeng] S;School of Civil Engineering and Architecture, Hubei University of Arts and Science, Xiangyang, China
摘要：
Quicklime (CaO) or reactive magnesia (MgO) could be utilized as a novel activator of ground granulated blast-furnace slag (GGBS) to produce the geopolymer. The geopolymer was used to solidify soft soil, showing a significant environmental benefit over conventional Portland cement. In this study, the geopolymers were made according to the weight ratio of CaO/MgO to GGBS of 1:9 and 2:8 and were further used to solidify silty clay. The engineering and microstructural characteristics of the solidified silty clay were investigated through various physicochemical, mechanical, and microscopic tests. The results indicated that the unconfined compressive strength of the solidified specimens increased with the increase of activator ratio and curing period. The CaO-GGBS (CG)-solidified soil had a higher unconfined compressive strength than the MgO-GGBS (MG)-solidified soil after 7-day curing, while the MG-solidified soil showed good mechanical properties in the long run. The pH and electrical conductivity of the solidified soils gradually decreased with the decreasing binder dosage and the increasing curing period, and these values of MG-solidified soils were lower than those of CG-solidified soils. Based on XRD analysis, the CSH and hydrotalcite were confirmed to be the main hydration product of both CG/MG-solidified soils in filling the large pores, and the reinforcement mechanism model for the soil treated with CG/MG geopolymers was also proposed. The research results demonstrated that CG/MG geopolymers can be used as a binder to solidify soft soils.
摘要：
As an advanced time-frequency (TF) decomposition (TFD) method, variational nonlinear chirplet mode decomposition (VNCMD) decomposes the original signal into a series of nonlinear chirplet modes (NCMs), such that the inherent characteristic information contained in the signal can be revealed effectively. However, the decomposition ability of VNCMD is largely affected by the prior instantaneous frequency (IF) and the pre-set parameters. In practical engineering applications, the presence of noise and interference components often complicates the accurate determination of prior IFs and appropriate decomposition parameters. Considering the above issues, in order to precisely extract the NCMs and realize the effective analysis of mechanical vibration signals, this paper mainly focuses on the drawbacks of accurate prior IF and the decomposition parameters of VNCMD, and proposed an improved version via local maximum synchrosqueezing transform and a recursive mode extracting scheme. The performance of the proposed method is evaluated through simulation cases, and the results demonstrate its effectiveness. Finally, the proposed method is successfully applied to bearing data analysis and rub-impact fault detection.
