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The Role of the size Effect on the Drying of Refractory Castables—How Its Under-standing Could Narrow the Gap between Laboratory studies and Industrial Reality

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China's Refractories 2024年第2期33卷 35-40页

作者： M.H.MOREIRA H.PENG s.Dal PONT v.C.PANDOLFELLI Materials Engineering Department Federal University of São Carlos(UFSCar)São Carlos 13565-905Brazil Materials Innovation Elkem Silicon Products DevelopmentKristiansand 4621Norway CNRs Grenoble INP3SRUniversitéGrenoble AlpesGrenoble 38000France

Refractories have unique capabilities such as sustaining their shape and properties at extreme conditions such as the combination of high temperatures and thermal shock,contact with molten metals and slags and in some circumstances resistance to erosion from abrasive *** the large processing output of the heavy industries such as the cement and steel ones which both require high temperature processes,the refractories structures span various meters and weight of several *** the water removal stage of hydraulic bonded castables in industrial sites takes hours(10-60 h)due to the risk of explosive spalling,efforts to mitigate it are commonly *** has provided theoretical understanding of the general aspects of drying and important tools,such as the thermogravimetry analysis(TGA),for the design of refractory compositions with higher explosive spalling ***,the optimization of this process is still far from the industrial reality especially because the actual linings that require the drying are orders of magnitude larger than the samples considered in the laboratory ***,this study proposed the analysis of the sample volume effect on the water removal dynamics through TGA of high alumina castables with calcium aluminate ***φ5 cm×5 cm cylindrical samples were assessed in a laboratory scale equipment whereas macro TGA were carried out considering 20 cm×20 cm×20 cm and 30 cm×30 cm×30 cm cubic ***,the effect of polymeric fibers was also *** was found out that the different thermal gradients within the macro TGA samples resulted in an inflection on the sample’s heating rate and that the mass loss was affected by the volume considered,especially for the composition without *** findings highlight the requirement of carefully taking into consideration the different dimensional sizes and thermal gradients in the samples when analyzing and interpreting the laboratory studies,and

关键词： drying refractory castables size effect thermogravimetry analysis

single atom Cu-N-C catalysts for the electro-reduction of CO_(2) to CO assessed by rotating ring-disc electrode

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Journal of Energy Chemistry 2024年第1期88卷 169-182,I0004页

作者： s.Pérez-Rodríguez M.Gutiérrez-Roa C.Giménez-Rubio D.Ríos-Ruiz P.Arévalo-Cid M.v.Martínez-Huerta A.Zitolo M.J.Lázaro D.sebastián Instituto de Carboquímica(CsIC) Miguel Luesma Castán 450018 ZaragozaSpain Instituto de Catálisis y Petroleoquímica(CsIC) Marie Curie 228049 MadridSpain synchrotron sOLEIL L’Orme des MerisiersDépartementale 12891190France

The electrochemical CO_(2) reduction reaction(CO_(2)RR) to controllable chemicals is considered as a promising pathway to store intermittent renewable energy. Herein, a set of catalysts based on copper-nitrogendoped carbon xerogel(Cu-N-C) are successfully developed varying the copper amount and the nature of the copper precursor, for the efficient CO_(2)RR. The electrocatalytic performance of Cu-N-C materials is assessed by a rotating ring-disc electrode(RRDE), technique still rarely explored for CO_(2)RR. For comparison, products are also characterized by online gas chromatography in a H-cell. The as-synthesized Cu-NC catalysts are found to be active and highly CO selective at low overpotentials(from -0.6 to -0.8 v ***) in 0.1 M KHCO_(3), while H_(2) from the competitive water reduction appears at larger overpotentials(-0.9 v vs. RHE). The optimum copper acetate-derived catalyst containing Cu-N_(4) moieties exhibits a CO_(2)-to-CO turnover frequency of 997 h^(-1) at -0.9 v vs. RHE with a H_(2)/CO ratio of 1.8. These results demonstrate that RRDE configuration can be used as a feasible approach for identifying electrolysis products from CO_(2)RR.

关键词： Cu-N-C Carbon xerogel Rotating ring disc electrode Carbon dioxide reduction reaction Carbon monoxide

Wind energy feasibility and wind turbine selection studies for the city surat,India

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Clean Energy 2024年第3期8卷 166-173页

作者： Arshi Banu P s Maanat Bhadani Hindustan Institute of Technology and science ChennaiIndia The Doon school UttarakhandDehradunIndia

Wind energy represents a clean,abundant and cost-effective power source,fostering job growth and environmental *** wind energy harnesses several gigawatts today,its availability hinges on diverse factors,with geographical location standing *** turbines,with varying capacity ranges,saturate the *** site-specific suitability and matching the appropriate turbine to meet specific requirements are of paramount *** study aims to assess the feasibility of wind energy in surat,Gujarat,India and select an optimal small commercial turbine for residential *** research involves Rayleigh and Weibull probability distribution functions based on yearlong velocity *** distributions are fitted with actual data,revealing the most probable velocity(v_(mf)=3 m/s)and velocity at maximum power(v_(pmax)=5 m/s).The power availability of the site has been assessed as 42.6 W/m^(2)using both graphical and analytical *** commercial turbines have been shortlisted based on on-site power criteria and their specifications are evaluated against site power availability.A comparative analysis culminates in identifying the most suitable turbine for the *** best suitable turbine for the site with an annual energy yield of 8 MW has been suggested amongst selected turbines for small-scale residential applications.

关键词： site feasibility wind energy commercial wind turbine probability distribution function rated power

等离子体技术制备具有亚微米颗粒结构的球化W-Cu伪合金微粉

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Transactions of Nonferrous Metals society of China 2024年第2期34卷 592-603页

作者： A.v.sAMOKHIN N.v.ALEKsEEv A.A.DOROFEEv A.A.FADEEv M.A.sINAYsKIY I.D.ZAvERTIAEv Y.v.GRIGORIEv Institute of Metallurgy and Materials science Russian Academy of SciencesMoscow 119334Leninsky prospect 49Russian Federal scientific Research Center“Crystallography and Photonics” Russian Academy of SciencesMoscow 119334Leninsky prospect 59Russian

采用复杂多级方法研究并证实制备具有亚微米/纳米级内部结构的球形W-Cu复合微粉的可能性。首先,采用等离子体化学合成法制备具有核壳结构的W-Cu纳米粉末(W核及Cu壳)。然后,将W-Cu纳米粉末与蔗糖的水悬浮液进行喷雾干燥,形成25~63μm的微... 详细信息

采用复杂多级方法研究并证实制备具有亚微米/纳米级内部结构的球形W-Cu复合微粉的可能性。首先,采用等离子体化学合成法制备具有核壳结构的W-Cu纳米粉末(W核及Cu壳)。然后,将W-Cu纳米粉末与蔗糖的水悬浮液进行喷雾干燥,形成25~63μm的微粒,收率为50%。最后,用热等离子体射流处理由纳米粉末组成的微粒,形成致密的球形W-Cu颗粒。成品粉末的球化度为90%~95%,体积密度为8.1 g/cm^(3),流动性约为12 s/50 g,杂质中O、C和H的含量(质量分数)分别为0.7%、0.02%~0.2%和0.03%~0.05%。

关键词： W-Cu复合材料等离子体化学合成造粒等离子体球化纳米颗粒微粒微粉

structural,morphological,optical and antibacterial performances of rare earth(sm)-doped ZnO nanorods

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Journal of Rare Earths 2024年第11期42卷 2119-2127页

作者： A.Ravi J.samuel s.sahaya Jude Dhas s.Usharani Turibius simon D.senthil Kumar s.K.Jasmin vijitha A.sivakumar Raju suresh Kumar C.s.Biju Department of Physics University College of Engineering Department of Physics and Research Centre Malankara Catholic College Manonmaniam sundaranar University saveetha school of Engineering Saveetha Institute of Medical and Technical SciencesSaveetha University Department of Chemistry S.I.V.E.T College Department of Biotechnology Vivekanandha College of Arts and Science for Woman (Autonomous) Department of Physics Vel Tech Rangarajan Dr.Sagunthala R & D Institute of Science and Technology Department of Physics & Research Centre Muslim Arts College Key Laboratory of High-temperature and High-pressure study of the Earth's Interior Institute of GeochemistryChinese Academy of Sciences Department of Chemistry College of ScienceKing Saud University Department of Physics St. Alphonsa College of Arts and Science

The significant rise of ultra-violet（Uv） radiation and pathogenic infectious bacteria poses a serious threat to global *** researchers' interests are attracted by novel materials with strong Uvblocking ability,antibacterial activity and low toxicity to other *** this case,a simple wet chemical method with different annealing temperatures（400,500,and 600℃） was employed to create highly effective rare earth（sm）-doped ZnO ***（101） plane of wurtzite ZnO shifts towards a lower angle with increasing annealing temperature,according to the X-ray diffraction（XRD） study findings,which additionally establishes the consequence of lattice *** of doublet peaks of sm 3d(sm 3d5/2and sm 3d3/2) in the X-ray photoelectron spectroscopy（XPs） spectrum clearly validates the substitution of sm3+ions in the 500℃-annealed *** 500℃-annealed nanorods exhibit combined performances of the wide band gap,improved Uv absorbance,and vivid green luminescent emission（563 nm）.Additio nally,the nanorods have favorable Uv-blocking execution of 96% for UvA at 360 nm,92% for UvB at 320 nm,and 57% for UvC at 225 nm,which is greater than the majority of ZnO-related materials that have been reported up to this *** doping is also appropriate for improving bacterial inhibition against the two studied strains（Escherichia coli and staphylococcus aureus）,in addition to the intriguing features discussed ***,with maximum inhibition zone diameters of 20±0.72 and 18±0.57 mm,respectively,these nanorods exhibit high inhibitory action against *** and *** bacterial *** rare earth-doped material developed during the current experiment,which was annealed at 500℃,could potentially serve as an effective replacement for Uv-blocking and antibacterial material,especially for biomedical applications.

关键词： Bacterial inhibition Metal oxide Rare earth doping Uv-shielding Wet chemical method

A new aberrant species of the genus sphaerostoma(Trematoda: Opecoelidae) from the Amur River basin

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Zoological systematics 2024年第4期 352-360页

作者： sergey G.sokolov sergei v.shchenkov Evgeniy v.Frolov sergei A.vlasenkov A.N.severtsov Institute of Ecology and Evolution RAs Department of Invertebrate Zoology St.Petersburg State University sakhalin Branch of Russian Federal Research Institute of Fisheries and Oceanography

A new freshwater opecoelid species, sphaerostoma tamarae sp. nov., is described from Rhynchocypris percnura mantschurica caught in the syumnyur River(Amur River basin,Russia). This parasite species differs from all other congeners in the distribution of the vitelline follicles(restricted to the hindbody) and the morphology of the ventral sucker(strongly protuberant). Molecular phylogenetic analysis based on 28s rRNA gene sequences and the morphological analysis allow to tentatively assign the new species to the genus sphaerostoma,without closing the question regarding the true genus affiliation of this species. In addition, the authors provide an argument for renaming the Plagioporinae to the sphaerostomatinae.

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Microbial phenolic metabolites are associated with better frontal lobe cognition

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Food science and Human Wellness 2024年

作者： Inés Domínguez-López Isabella Parilli-Moser Anna vallverdú-Queralt Anna Tresserra-Rimbau Cinta valls-Pedret Zenaida vázquez-Ruiz Olga Casta?er Ramon Estruch Emili Ros Rosa M.Lamuela-Raventós Lipid Clinic， Endocrinology and Nutrition service， Institut d'Investigacions Biomèdiques August Pi i sunyer， Hospital Clínic 08036 Barcelona， Spain Unit of Cardiovascular Risk and Nutrition， Institut Hospital del Mar de Investigaciones Médicas (IMIM) Department of Preventive Medicine and Public Health， University of Navarra Departament de Nutrició， Ciències de l'Alimentació i Gastronomía， Facultat de Farmacia， Universitat de Barcelon (UB)， Av.de Joan XXII Department of Endocrinology， Hospital Clinic IDIBAPS， Barcelona， Spain Department of Internal Medicine， Hospital Clinic， Institut d'Investigació Biomèdica August Pi i sunyer (IDIBAPs)， University of Barcelona CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN)， Instituto de salud Carlos III Institut de Nutrició i seguretat Alimentària (INsA)， Universitat de Barcelona (UB)

With increasing life expectancy， neurodegenerative diseases have become one of the leading causes of ill-health in the elderly. Preventive strategies include following healthy diets， such as the Mediterranean diet， which is particularly rich in polyphenols， bioactive compounds with neuroprotective properties. The aim of this study was to assess the association of microbial phenolic metabolites (MPM) with cognition. This cross-sectional analysis was performed with 200 participants of the PREDIMED trial (Barcelona-Clinic recruitment center). A novel method based on liquid chromatography coupled to mass spectrometry was used to identify urinary MPM (protocatechuic acid， enterodiol glucuronide， enterolactone glucuronide， urolithin B glucuronide， and vanillic acid glucuronide)， and cognitive function was evaluated with neuropsychological tests. Multivariable-adjusted ordinary least squares regression was used to assess the associations between cognitive function and MPM， and a score was calculated as the weighted sum of MPM. A higher MPM score was associated with better frontal lobe function. Among individual metabolites， vanillic acid glucuronide was correlated with frontal cognitive performance. Participants with higher concentrations of vanillic acid glucuronide and urolithin B glucuronide obtained better scores in the Color Trail Test part 2. A higher score for urinary multi-MPM was associated with better frontal cognitive performance in an older Mediterranean population.

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Cr-induced fusion reactions to synthesize superheavy elements

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Nuclear science and Techniques 2024年第5期35卷 122-130页

作者： s.Madhu H.C.Manjunatha N.sowmya B.M.Rajesh L.seenappa R.s.susheela Department of Physics R V College of EngineeringBangalore 560074India visvesvaraya Technological University BelagaviKarnataka 590018India Department of Physics Government First Grade CollegeSrinivasapurKarnataka 563135India Department of Physics Government First Grade CollegeDevanahallyKarnataka 562110India Department of Physics Government First Grade CollegeMulbagalKarnataka 563131India Department of Physics Government First Grade collegeNanjangudOoty RoadMysore 571301India

We investigated ^(50,52-54)Cr-induced fusion reactions for the synthesis of the superheavy element in the 104≤Z≤122 *** cross sections produced in this investigation using ^(54)Cr projectiles were compared with those obtained in prior *** estimated cross sections from this analysis are consistent with the findings of prior *** the current study,the predicted cross section was found to be 42fb at 236 Mev for ^(53)Cr+^(243)Am,23.2 fb at 236 Mev for ^(54)Cr+^(247)Cm,95.6 fb at 240 Mev for ^(53)Cr+248Bk,and 1.33 fb at 242 Mev for ^(53)Cr+***,these projected cross sections with excitation energy and beam energy will be useful in future Cr-induced fusion reaction investigations.

关键词： Fusion cross sections Compound nucleus formation probability survival probability Evaporation residue cross sections

Hybrid bimetallic cluster ZrO2/Rh@N,s co-doped porous carbon nanosheets for efficient hydrogen evolution in acid electrolytes

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Tungsten 2024年第4期6卷 657-662页

作者： Xin-Yi Zhang Igor v.Zatovsky Jun-Ming Cao Xing-Long Wu Faculty of Chemistry Northeast Normal University F.D.Ovcharenko Institute of Biocolloidal Chemistry NAS Ukraine MOE Key Laboratory for Uv Light-Emitting Materials and Technology Northeast Normal University

Acid hydrogen evolution reaction (HER) is a critical energy conversion process,which is significantly important in hydrogen energy manufacturing and storage [1].Although the performance of noble metal platinum (Pt)-based catalysts in acidic HER is well known,the challenges are high cost,limited reserves,poor stability,and susceptibility to toxic substances [2].Therefore,it is urgent to design and manufacture acidic HER catalysts with high reactivity,high stability,and low cost.

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