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Tungsten 2024年第2期6卷 293-303页

作者： Hao-Zhe Xu Dong Li Ying Chen Pin Fang Xiao-Xing Ke Olga Demidenko Yu-Jing Li Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications Experimental Center of Advanced MaterialsSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Faculty of Materials and Manufacturing Beijing University of TechnologyBeijing 100124China Scientifi c-Practical Materials Research Centre National Academy of Sciences of Belarus220072 MinskBelarus

Platinum-group-metal-based alloy nanocrystals have been considered as the most effi cient catalysts for oxygen reduction reaction(ORR).However,the poor stability issues limit their further deployment in *** oxide(WO_(3))has received attention due to its intrinsic electrochemical stability and proton absorption/desorption *** this work,we prepared PtCuNi/WO_(3)/C hybrid catalyst with inter-diff usive alloy/WO_(3)interface on *** catalyst exhibits enhanced activity and stability associated with the WO_(3)*** characterization results suggest that the increased activity originates from the complementary proton supply of non-stoichiometric H_(x)WO_(3).Moreover,WO_(3)prevents the particle from dissolution and detachment under vigorous electrochemical *** enhanced stability originates from the electronic interaction established between Pt and *** work provides new strategies to design high-performance ORR catalysts by taking the merits of WO_(3)。

关键词： Tungsten oxide PtCuNi Interface Electronic interaction

Monascus purpureus M-32 fermented soybean meal improves the growth, immunity parameters, intestinal morphology, disease resistance, intestinal microbiota and metabolome in Pacific white shrimp(Litopenaeus vannamei)

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Animal Nutrition 2024年第2期17卷 283-296页

作者： Pan Wang Shanshan Wang Chuanzhong Zhu Yunzhang Sun Qingpi Yan Ganfeng Yi Fisheries College Jimei University Key Laboratory of Aquatic Functional Feed and Environmental Regulation of Fujian Province Fujian DBN Aquatic Sci.&Tech. Co. Ltd. Fantastic Victory(Shenzhen)Technological Innovation group Co. Ltd.

This study was conducted to evaluate the effects of Monascus purpureus M-32 fermented soybean meal（MFSM） on growth, immunity, intestinal morphology, intestinal microbiota, and intestinal metabolome of Pacific white shrimp（Litopenaeus vannamei）. Four groups of diets were formulated, including control group（30% fish meal and 30% soybean meal [SBM] included in the basal diet） and three experimental groups which MFSM replaced 20%（MFSM20）, 40%（MFSM40）, and 60%（MFSM60） of SBM in control group, respectively. Results showed that the soluble proteins larger than 49 k Da in MFSM were almost completely degraded. Meanwhile, the crude protein, acid-soluble protein, and amino acid in MFSM were increased. The results of shrimp culture experiment showed that the replacement of SBM with MFSM decreased FCR（P experimental groups, and increased weight gain rate（P = 0.006）, specific growth rate（P = 0.002）, survival rate（P = 0.005）, intestinal villus height（P experimental groups, as well as increased content of calcium(Ca2+) and phosphorus（■） in blood and muscle, and enhanced resistance to Vibrio parahaemolyticus infection. The gut microbiota of MFSM groups was significantly different from that of the control group,and the abundance of Actinobacteria and Verrucomicrobia increased significantly in the MFSM60 group,whereas Proteobacteria and Firmicutes decreased. Compared with the control group, there were significant changes in the levels of several intestinal metabolites in the MFSM60 group, including leukotriene C5, prostaglandin A1, taurochenodeoxycholic acid, carnosine, and itaconic acid. The fermentation of SBM by the strain M. purpureus M-32 has the potential to enhance the nutritional quality of SBM,promote the growth of L. vannamei, boost immune response, improve intestinal morphology and microbiota compos

关键词： Monascus purpureus Fermented soybean meal Litopenaeus vannamei Intestinal microbiota Metabolome

Machine learning-driven optimization of plasma-catalytic dry reforming of methane

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Journal of Energy Chemistry 2024年第9期96卷 153-163页

作者： Yuxiang Cai Danhua Mei Yanzhen Chen Annemie Bogaerts Xin Tu Department of Electrical Engineering and Electronics University of LiverpoolLiverpool L693GJUK Research group PLASMANT Department of ChemistryUniversity of AntwerpUniversiteitsplein 1BE-2610 Wilrijk-AntwerpBelgium College of Electrical Engineering and Control Science Nanjing Tech UniversityNanjing 211816JiangsuChina

This study investigates the dry reformation of methane(DRM)over Ni/Al_(2)O_(3)catalysts in a dielectric barrier discharge(DBD)non-thermal plasma reactor.A novel hybrid machine learning(ML)model is developed to optimize the plasma-catalytic DRM reaction with limited experimental *** address the non-linear and complex nature of the plasma-catalytic DRM process,the hybrid ML model integrates three well-established algorithms:regression trees,support vector regression,and artificial neural networks.A genetic algorithm(GA)is then used to optimize the hyperparameters of each algorithm within the hybrid ML *** ML model achieved excellent agreement with the experimental data,demonstrating its efficacy in accurately predicting and optimizing the DRM *** model was subsequently used to investigate the impact of various operating parameters on the plasma-catalytic DRM *** found that the optimal discharge power(20 W),CO_(2)/CH_(4)molar ratio(1.5),and Ni loading(7.8 wt%)resulted in the maximum energy yield at a total flow rate of∼51 mL/***,we investigated the relative significance of each operating parameter on the performance of the plasma-catalytic DRM *** results show that the total flow rate had the greatest influence on the conversion,with a significance exceeding 35%for each output,while the Ni loading had the least impact on the overall reaction *** hybrid model demonstrates a remarkable ability to extract valuable insights from limited datasets,enabling the development and optimization of more efficient and selective plasma-catalytic chemical processes.

关键词： Plasma catalysis Machine learning Process optimization Dry reforming of methane Syngas production

Coupled heat and moisture transfer in walls featuring moisture-buffering materials and ventilating layers:An experimental study

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Energy and Built Environment 2024年第1期5卷 97-109页

作者： Xueqiong He Chi Feng Huibo Zhang School of Design Shanghai Jiao Tong UniversityShanghai 200240China Shanghai Research Institute of Building Sciences group Co. LtdShanghai 200032China School of Architecture and Urban Planning Chongqing UniversityChongqing 400045China

The moisture performance of building envelopes largely depends on the building materials,construction tech-niques,and exposure loads from the indoor and outdoor regions.A ventilated air interlayer placed in a wall can help dehumidify the wall and indoor *** paper presents an experimental study of the heat,air,and moisture variations within the envelope wall of a chamber featuring different air interlayer settings under real outdoor air conditions during the summer of 2020 in Shanghai,***-developed humidity-controlling building mate-rials were applied to the inner building ***,humidity,wind velocity,and heat-flow sensors were placed at different positions in the middle of the *** parameters were measured and recorded in real-time under three working conditions:humidification,dehumidification,and *** experimental results show that under the ventilation working conditions,moisture content of 0.52 kg can be removed after a 2-h air layer ventilation,which can benefit the design strategy for the humidification and ventilation of dehu-midification walls.

关键词： Ventilated wall Heat and humidity coupling transfer Moisture-buffering materials experimental research

Research progress in CALPHAD assisted metal additive manufacturing

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China Foundry 2024年第4期21卷 295-310页

作者： Ya-qing Hou Xiao-qun Li Wei-dong Cai Qing Chen Wei-ce Gao Du-peng He Xue-hui Chen Hang Su China Iron&Steel Research Institute group Beijing 100081China Thermo-Calc Software AB SolnaSE-169Sweden KTH Royal Institute of Technology StockholmSE-100Sweden Central Iron and Steel Research Institute Beijing 100081China

Metal additive manufacturing(MAM)technology has experienced rapid development in recent *** both equipment and materials progress towards increased maturity and commercialization,material metallurgy technology based on high energy sources has become a key factor influencing the future development of *** calculation of phase diagrams(CALPHAD)is an essential method and tool for constructing multi-component phase diagrams by employing experimental phase diagrams and Gibbs free energy models of simple *** combining with the element mobility data and non-equilibrium phase transition model,it has been widely used in the analysis of traditional metal *** development of CALPHAD application technology for MAM is focused on the compositional design of printable materials,the reduction of metallurgical imperfections,and the control of microstructural *** endeavor carries considerable theoretical and practical *** paper summarizes the important achievements of CALPHAD in additive manufacturing(AM)technology in recent years,including material design,process parameter optimization,microstructure evolution simulation,and properties ***,the limitations of applying CALPHAD technology to MAM technology are discussed,along with prospective research directions.

关键词： metal additive manufacturing CALPHAD integrated computational material engineering powder bed fusion material design microstructure simulation

Exposure to microplastics induces lower survival,oxidative stress,disordered microbiota and altered metabolism in the intestines of grass carp(Ctenopharyngodon idella)

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Aquaculture and Fisheries 2024年第5期9卷 785-794页

作者： Xuewen Jia Yang Liu Yan He Hongyan Yu Yuting Liu Yubang Shen Xiaoyan Xu Jiale Li Key Laboratory of Freshwater Aquatic Genetic Resources Ministry of Agriculture and Rural Affairs Shanghai Ocean UniversityShanghai201306China National Demonstration Center for experimental Fisheries Science Education Shanghai Ocean UniversityShanghai201306China Shanghai Engineering Research Center of Aquaculture Shanghai Ocean UniversityShanghai201306China

There are major gaps in illustrating the risk to freshwater fish that are exposed to environmental microplastics(MPs),even though MPs in freshwater environments has drawn much *** explore the potentially negative effects of microplastics on freshwater fish,grass carp(averaging 9.215±0.035g)were exposed to microplastics(32-40μm in diameter)at two environmental concentrations(100 and 1000μg/L)for 21 days,and evaluated for physio-biochemical performance,gut microbiome,and metabolome *** exposure,microplastics were detected in the intestine and within basal nuclei and goblet cells *** enzyme activities(superoxide dismutase and catalase)also significantly decreased within the intestines(Pgroup,while Bacteroides and Shewanella increased in the MPs-H ***,abundance of Lactobacillus decreased both in the MPs-H and MPs-L *** analysis revealed primary bile acid biosynthesis metabolism upregulated in the MPs-L and purine metabolism downregulated in the MPs-H ***,an integration analysis of the gut microbiome and metabolomics identified significant associations between several bacteria taxa and metabolites related to intestinal *** together,these results highlighted the negative effects on intestinal morphology,oxidative stress,and microbiome and emphasized the relationship between microbiota and metabolites in response to microplastics,which could provide comprehensive insights into the potential risks of MPs on freshwater fish intestines.

关键词： Microplastics Oxidative stress Metabolomics Microbiome Grass carp Intestine

Roles of Aqueous Extract of Marigold on Arsenic-Induced Oxidative Damage in Pancreatic Islet β-Cells

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Journal of Biosciences and Medicines 2024年第5期12卷 19-34页

作者： Zongqin Mei Jiao Dai Guofen Liu Zuoshun He Shiyan Gu Institute of Preventive Medicine School of Public Health Dali University Dali China experimental Training Teaching Management Office Qujing Medical College Qujing China

Roles of Marigold extracts (ME) on arsenic trioxide (ATO)-induced oxidative damage to pancreatic β-cells need to be further elucidated. In this study, NIT-1 cells were treated with different concentrations of and/or ATO, following by the cell viability was detected by CCK8 assay. Then, intracellular reactive oxygen species (ROS) levels, lipid peroxide (MDA) contents and superoxide dismutase (SOD) activity were measured with a fluorescence probe method and colorimetric assay, respectively. The apoptosis rate and morphology was detected and observed with hoechst 33,258 staining assay. The mRNA levels and protein expressions of nuclear factor E2-related factor 2 (Nrf2) and heme oxygenase-1 (HO-1) were measured by real-time fluorescence quantitative polymerase chain reaction and protein immunoblotting assay, respectively. Our results indicated that Co-treatment with ME and ATO exacerbated the cell viability decreasing reduced by ATO, while the addition of ME after ATO treatment effectively promote the recovery of ATO reduced survival rates. The ATO group increased apoptosis (P P β-cells by modulating the activation of the Nrf2 signaling pathway.

关键词： Arsenic Trioxide Marigold Extracts Nuclear Factor E2-Related Factor 2 Oxidative Damage

Calcium Carbonate and Ettringite Induced Efflorescence in CAC-Anhydrite Binary Systems

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Journal of Wuhan University of Technology(Materials Science) 2024年第5期39卷 1129-1137页

作者： SUN Zixuan CHEN Yuting XU Linglin LIU Siyu YU Long PAN Feng WANG Chaoqiang WU Kai YANG Zhenghong Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education School of Materials Science and EngineeringTongji UniversityShanghai 201804China Shanghai Construction No.5(group)Co. Ltd.Shanghai 200063China School of Material Science and Engineering Chongqing Jiaotong UniversityChongqing 400074China

We focused on the efflorescence induced microstructural evolution of ettringite-rich systems prepared with calcium aluminate cement(CAC)and *** effects of anhydrite on the visible efflorescence,and the corresponding capillary absorption of CAC-anhydrite mortars were *** composition and microstructure of efflorescence-causing substances were investigated by optical microscope,in-situ Raman spectroscopy,scanning electron microscope,energy dispersive spectrometer,thermogravimetric analysis,and differential scanning calorimetry,at *** indicate that,besides the calcium carbonate,ettringite is another main component of efflorescence-causing *** with the neat CAC mortars,the addition of anhydrite has a significant effect on the degree of efflorescence by acting on the composition of hydration products and pore *** addition,methods are proposed for the prevention of efflorescence of CAC-anhydrite binary system.

关键词： calcium aluminate cement anhydrite efflorescence ettringite phase assemblage pore structure

Decorin treatment of spinal cord injury

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Neural Regeneration Research 2014年第18期9卷 1653-1656页

作者： Maryam Esmaeili Martin Berry Ann Logan Zubair Ahmed Neurotrauma Research group Neurobiology SectionSchool of Clinical and Experimental MedicineUniversity of Birmingham

The scarring response after a penetrant central nervous system injury results from the interaction between invading leptominingeal/pericyte-derived fibroblasts and endogenous reactive astrocytes about the wound margin. Extracellular matrix and scar-derived axon growth inhibitory mole- cules fill the lesion site providing both a physical and chemical barrier to regenerating axons. Dec orin, a small leucine-rich chondroitin-dermatan sulphate proteoglycan expressed by neurons and astrocytes in the central nervous system, is both anti-fibrotic and anti-inflammatory and attenu- ates the formation and partial dissolution of established and chronic scars. Here, we discuss the potential of using Decorin to antagonise scarring in the central nervous system.

关键词： spinal cord injury Decorin transforming growth factor-beta scarring chondroiti^sulphate proteoglycan matrix metalloproteases

Solidification behaviour and hot cracking susceptibility of a novel Ni-based superalloy

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Journal of Iron and Steel Research International 2024年第4期31卷 956-966页

作者： Yue Chen Shao-min Lv Xing-fei Xie Xiao-can Wen Jng-long Qu Jin-hui Du High-Temperature Materials Institute China Iron and Steel Research Institute Group Co.Ltd.Beijing 100081China Beijing GAONA Materials and Technology Co. Ltd.Beijing 100081China Sichuan CISRI-GAONA Forging Co. Ltd.Deyang 610000SichuanChina

A novel Ni-based superalloy GH4151,with a γ′ volume fraction of about 55%and a service temperature capability up to 8oo oC,was *** to the different cooling conditions of various regions during the solidification of ingots,significant cooling rate variations may lead to the occurrence of hot *** scanning laser microscope was utilised to investigate the solidification process and phase precipitation behaviour of the GH4151 under wide range cooling *** characteristics of L→γ transformation were analysed,and the growth rates of at each stage were *** segregation behaviour was predicted using the Scheil equation,and the predicted results match well with the experimental *** sensitivity coefficient for hot cracking was modified,and cracking sensitivity coefficient values for the alloy under different cooling rates were computed,revealing that the alloy is most susceptible to hot cracking at 10℃/min cooling ***,controlling the cooling rate can reduce the possibility of hot cracking in ingot.

关键词： Ni-based superalloy Solidification behaviour In-situ observation Clyne and Davies's criterion:Hot cracking susceptibility