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Understanding the oxidation chemistry of Ti_(3)C_(2)T_(x)(MXene)sheets and their catalytic performances

Journal of Energy Chemistry 2024年第1期88卷 437-445,I0010页

作者： suvdanchimeg sunderiya selengesuren suragtkhuu solongo Purevdorj Tumentsereg Ochirkhuyag Munkhjargal bat-Erdene Purevlkham Myagmarsereejid Ashley Dslattery Abdulaziz s.bati Joseph Gshapter Dorj Odkhuu sarangerel Davaasambuu Munkhbayar batmunkh Department of Chemistry Division of Natural SciencesSchool of Arts and SciencesNational University of MongoliaUlaanbaatar 14200Mongolia Queensland Micro-and Nanotechnology Centre School of Environment and ScienceGriffith UniversityNathan campusBrisbaneQueensland 4111Australia Department of Physics Incheon National UniversityIncheon 22012Republic of Korea Australian Institute for Bioengineering and Nanotechnology The University of QueenslandSt LuciaBrisbaneQueensland 4072Australia Adelaide Microscopy The University of AdelaideAdelaideSouth Australia 5005Australia Centre for Organic Photonics&Electronics School of Chemistry and Molecular BiosciencesThe University of QueenslandSt LuciaBrisbaneQueensland 4072Australia

Transition metal carbides and nitrides(MXenes)nanosheets are attractive two-dimensional(2D)materials,but they suffer from oxidation/degradation issues during storage and/or applications due to their sensitivity to water and *** the great research progress,the exact oxidation kinetics of Ti_(3)C_(2)T_(x)(MXene)and their final products after oxidation are not fully ***,we systematically tracked the oxidation process of few-layer Ti_(3)C_(2)T_(x) nanosheets in an aqueous solution at room temperature over several *** also studied the oxidation effects on the electrocatalytic properties of Ti_(3)C_(2)T_(x) for hydrogen evolution reaction and found that the overpotential to achieve a current density of 10 mA cm^(-2)increases from 0.435 to 0.877 V after three weeks of degradation,followed by improvement to stabilized values of around 0.40 V after eight *** results suggest that severely oxidized MXene could be a promising candidate for designing efficient *** to our detailed experimental characterization and theoretical calculations,unlike previous studies,black titanium oxide is formed as the final product in addition to white Ti(IV)oxide and disordered carbons after the complete oxidation of Ti_(3)C_(2)T_(x).This work presents significant advancements in better understanding of 2D Ti_(3)C_(2)T_(x)(MXene)oxidation and enhances the prospects of this material for various applications.

关键词： 2D materials MXene Chemical degradation Catalysis Hydrogen evolution reaction

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Rare-earth Magnet Free Flux-switching Generator for Wind Turbines in Micro-grids:A Review

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CEs Transactions on Electrical Machines and systems 2024年第3期8卷 295-309页

作者： Tugberk Ozmen batıEren Ergun Mehmet Onur Gulbahce Nevzat Onat Vocational school of Manisa Technical sciences Manisa 45140Turkey department of Electrical Engineering Istanbul Technical UniversityIstanbul 34469Turkey Department of Electrical and Electronics Engineering University of Manisa Celal Bayar UniversityManisa 45140Turkey

In traditional electricity generation plants,large powerful synchronous,induction,and direct current generators were *** the proliferation of microgrids focused on electricity generation from renewable energy sources in today’s power grids,studies have been conducted on different types of *** of the traditional generator architecture,generators with brushless structures,particularly those utilizing magnets for excitation,have found broad *** generators(FsGs)are innovative types owing to their robust structure,active stator design,and high power density ***,designs have typically relied on rare-earth element ***-earth magnets possess negative characteristics such as price uncertainty,the potential risk of scarcity in the future,and limited geographical production,leading to research on FsGs that do not depend on rare-earth *** study comprehensively examines FsGs that do not use rare-earth element *** study delves into the usage areas,operational mechanisms,structural diversities,and counterparts in the literature of these generators.

关键词： Flux-switching Generator Micro-grid Wind energy

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Olfactory receptors in neural regeneration in the central nervous system

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Neural Regeneration Research 2025年第9期20卷 2480-2494页

作者： Rafael Franco Claudia Garrigós Toni Capó joan serrano-Marín Rafael Rivas-santisteban Jaume Lillo Molecular Neurobiology Laboratory Department of Biochemistry and Molecular BiomedicineFacultat de BiologiaUniversitat de BarcelonaBarcelonaSpain CiberNed Network Center for Biomedical Research in Neurodegenerative Diseases Spanish National Health Institute Carlos ⅢMadridSpain school of Chemistry Universitat de BarcelonaBarcelonaSpain Department of Biochemistry and Physiology School of Pharmacy and Food SciencesUniversitat de BarcelonaBarcelonaSpain Laboratory of Computational Medicine Biostatistics UnitFaculty of MedicineAutonomous University of BarcelonaCampus BellaterraBarcelonaSpain

Olfactory receptors are crucial for detecting odors and play a vital role in our sense of smell,influencing behaviors from food choices to emotional *** receptors also contribute to our perception of flavor and have potential applications in medical diagnostics and environmental *** ability of the olfactory system to regenerate its sensory neurons provides a unique model to study neural regeneration,a phenomenon largely absent in the central nervous *** gained from how olfactory neurons continuously replace themselves and reestablish functional connections can provide strategies to promote similar regenerative processes in the central nervous system,where damage often results in permanent *** the molecular and cellular mechanisms underpinning olfactory neuron regeneration could pave the way for developing therapeutic approaches to treat spinal co rd injuries and neurodegenerative diseases like Alzheimer's *** ctory receptors are found in almost any cell of eve ry orga n/tissue of the mammalian *** ectopic expression provides insights into the chemical structures that can activate olfactory *** addition to odors,olfactory receptors in ectopic expression may respond to endogenous compounds and molecules produced by mucosal colonizing *** analysis of the function of olfactory receptors in ectopic expression provides valuable information on the signaling pathway engaged upon receptor activation and the receptor's role in proliferation and cell differentiation *** review explo res the ectopic expression of olfa ctory receptors and the role they may play in neural regeneration within the central nervous system,with particular attention to compounds that can activate these receptors to initiate regenerative *** suggests that olfactory receptors could serve as potential therapeutic targets for enhancing neural repair and recovery following central nervous syste

关键词： adenosine receptors adrenergic receptors ectopic expression G proteincoupled receptors glia neurons

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Effect of the Density of Molten Metal on the Raining Phenomenon in Horizontal Centrifugal Casting

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Open Journal of Applied sciences 2024年第7期14卷 1918-1926页

作者： Miguel A. Barron joan Reyes Departamento de Materiales Universidad Autonoma Metropolitana Azcapotzalco Ciudad de Mexico Mexico

In this work the influence of the density of the molten metal on the emergence of the raining phenomenon in the horizontal centrifugal casting process is numerically studied. Transient 2D numerical simulations were carried out using Computational Fluid Dynamics software. Three molten metals with different density, namely aluminum, iron and lead, and three angular frequencies, namely 50, 66 and 77 rad/s were considered. It is found that the density of the molten metal significantly affects the emergence, transient or permanent, of the rain phenomenon. However, the magnitude and duration of the rain phenomenon depend on the angular frequency of the rotating mold. Likewise, since gravitational forces affect the metal according to its density, the value of the critical rotation speed of the mold is also affected.

关键词： Angular Frequency Centrifugal Force Computational Fluid Dynamics Critical Rotation speed G Factor Horizontal Centrifugal Casting Molten Metal Density

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Lack of evidence for germline WWP1 pathogenic variants in gastrointestinal polyposis and other phenotypes suggestive of PTEN-hamartoma-tumor syndrome

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Genes & Diseases 2024年第2期11卷 524-527页

作者： Noemi Gonzalez-Abuin Tirso Pons Teresa Fuster Isabel Quintana Mariona Terradas Gemma Aiza joan Brunet Gabriel Capellá Heather Hampel Laura Valle Hereditary Cancer Program Catalan Institute of OncologyOncobell ProgramIDIBELLHospitalet de LlobregatBarcelona 08908Spain Department of Immunology and Oncology National Center for BiotechnologySpanish National Research Council (CNB-CSIC)Madrid 28049Spain Centro de Investigación Biomédica en Red de Cáncer (CIBERONC) Madrid 28029Spain Catalan Institute of Oncology IDIBGiGirona 17007Spain Division of Clinical Cancer Genomics Department of Medical Oncology & Therapeutic ResearchCity of Hope National Cancer CenterDuarteCA 91010USA

Germline activating variants in WWP1,which encodes an E3 ubiquitin ligase that antagonizes PTEN tumor suppressive function,have been proposed as an alternative mechanism of PTEN inactivation in PTEN-hamartoma-tumor syndrome(PHTs)-like patients with wildtype PTEN.1 More specifically,heterozygous,potentially activating wwP1 variants were first identified by Lee et al in patients affected with gastrointestinal oligopolyposis,including adenomatous,hyperplastic/serrated,and hamartomatous polyps,and occasionally with colorectal cancer(Table 1).subsequently,based on the PHTs phenotypic features,wWP1 mutational screening was performed in patients with thyroid nodules,2 or normocephalic autism spectrum disorder(AsD),3 where germline WWP1 variants were also identified(Table s1).

关键词： WWP1 gastrointestinal polyposis

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Open Journal of Civil Engineering 2024年第2期14卷 214-224页

作者： joan Anyika Otike Charles Kabubo Victoria Okumu Kenya National Highways Authority Nairobi Kenya Jomo Kenyatta University of Agriculture and Technology Nairobi Kenya

The performance of bridge projects in Kenya is poor in terms of completion by schedule, cost, and quality (scope). Yet, there is less evidence of empirical research on what factors contribute to this outcome. This study aimed to bridge this gap by examining the effects of contractor-related factors on the performance of bridge construction projects in Kenya through a case study of the Bridge projects Implemented by the Kenya National Highway Agency (KeNHA). The theory of constraints (TOC) was adopted as its theoretical framework. Descriptive research was used, and the target population was 18 bridge construction projects, which were the units of analysis from 2012 to 2022. In each of these projects, 18 respondents, namely clients, consultants, contractors, engineers, environment and social guards, project managers, stakeholders, subcontractors, technical advisors, and inspectors, were included in a target population of 144 respondents. A census was conducted and a structured questionnaire was administered from which a response rate of 68% was achieved. The information was analyzed using descriptive, correlation, and multiple linear regression analysis. The contractor-related factors considered in the study were staff and management factors. The findings indicated that staff and management factors had a positive and significant outcome on performance of bridge construction projects. The study recommends continuous training and a safe learning environment for staff to improve their skills and performance in future projects. The study also recommends that a special category for bridge contractors be created in Kenya’s National Construction Authority rankings to ensure that only qualified contractors implement the Bridge projects.

关键词： staff Factors Management Factors Performance Bridge Projects KeNHA

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Non-Darcy Flow in Molding sands

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Open Journal of Applied sciences 2024年第4期14卷 976-982页

作者： Miguel A. Barron-Meza joan Reyes-Miranda Daniel Flores-sanchez Departamento de Materiales Universidad Autonoma Metropolitana Azcapotzalco Ciudad de Mexico Mexico

Darcy’s law is widely used to describe the flow in porous media in which there is a linear relationship between fluid velocity and pressure gradient. However, it has been found that for high numbers of Reynolds this law ceases to be valid. In this work, the Ergun equation is employed to consider the non-linearity of air velocity with the pressure gradient in casting sands. The contribution of non-linearity to the total flow in terms of a variable defined as a non-Darcy flow fraction is numerically quantified. In addition, the influence of the shape factor of the sand grains on the non-linear flow fraction is analyzed. It is found that for values of the Reynolds number less or equal than 1, the contribution of non-linearity for spherical particles is around 1.15%.

关键词： Darcy’s Law Molding sands Non-Darcy Flow Reynolds Number shape Factor

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Personalized nutrition to mitigate inflammation in genetically predisposed individuals: a secondary analysis of the Danish PREVENTOMICs intervention

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Food science and Human Wellness 2024年

作者： sebastià Galmés Andreu Palou-March Kristina Pigsborg Mona Adnan Aldubayan sophia M.O.Gormsen Alberto Calleja joan Trabal Vanesa Martínez Biotza Gutiérrez Josep M.Del Bas Faidon Magkos Francisca serra Eurecat， Centre tecnològic de Catalunya， Biotechnology Area Avd Universitat 1 Laboratory of Molecular Biology， Nutrition and Biotechnology (Nutrigenomics， Biomarkers and Risk Evaluation-NuBE)， University of the Balearic Islands Health Research Institute of the Balearic Islands (IdIsBa) CIBER of Physiopathology of Obesity and Nutrition (CIBEROBN)， Carlos III Health Institute (IsCIII) Alimentómica s.L.， Camí de na Pontons.s/n (Pol.11，Parc 3) Department of Nutrition， Exercise and sports， Faculty of science， University of Copenhagen Department of Clinical Nutrition， College of Applied Medical sciences， King saud bin Abdulaziz University for Health sciences R&D， Food & Culinary Department simple Feast Leitat Technological Center C/Innovació 2 Creaciones Aromáticas Industriales sA， Cuatrecasas i Arumí， sant Quirze del Valles

Deep phenotyping and genetic characterization of individuals are fundamental to assessing the metabolic status and determining nutrition-specific requirements. This study aimed to ascertain the utmost effectiveness of personalized interventions by aligning dietary adjustments with both the genotype and metabolotype of individuals. Therefore， we assessed here the usefulness of a polygenic score (PGs) characterizing a potential pro-inflammatory profile (PGsi) as a nutrigenetic tool to discern individuals from the Danish PREVENTOMICs cohort that could better respond to precision nutrition (PN) plans， specifically targeted at counteracting the low-grade inflammatory profile typically found in obesity. The cohort followed a PN plan to counteract the pro-inflammatory profile (PNi group) or generic dietary recommendations (Control) for 10 weeks. PGsi was applied for genetic stratification (Low/High). The effects of the intervention on anthropometrics and biomarkers related to inflammatory profile and carbohydrate metabolism were assessed. Around 30% of subjects had a high genetic predisposition to pro-inflammatory status (high-PGsi). These individuals demonstrated the most effective response to the dietary plan， experiencing improved body composition， with significant decreases in body weight (△: -4.84%; p=0.039) and body fat (△: -4.86%; p=0.007)， and beneficial changes in pro- and anti-inflammatory biomarkers， with significant increases in IL-10 (△: 71.3%; p=0.025) and decreases in TNF-α (△: -3.0%; p=0.048)， CRP (△: -31.1%)， ICAM1 (△: -5.8%)， and MCP1 (△: -4.2%) circulating levels， compared to low-PGsi individuals. Both phenotypic and genetic stratification contributed to a better understanding of metabolic heterogeneity in response to diet. This approach allows for refinement of the prediction of individual requirements and potentially for better management of obesity.

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Prediction of Bandwidth of Metamaterial Antenna Using Pearson Kernel-Based Techniques

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Computers, Materials & Continua 2024年第3期78卷 3449-3467页

作者： sherly Alphonse s.Abinaya sourabh Paul school of Computer science and Engineering Vellore Institute of TechnologyChennai600127India school of Electronics Engineering Vellore Institute of TechnologyChennai600127India

The use of metamaterial enhances the performance of a specific class of antennas known as metamaterial *** radiation cost and quality factor of the antenna are influenced by the size of the *** antennas allow for the circumvention of the bandwidth restriction for small *** parameters have recently been predicted using machine learning algorithms in existing *** learning can take the place of the manual process of experimenting to find the ideal simulated antenna *** accuracy of the prediction will be primarily dependent on the model that is *** this paper,a novel method for forecasting the bandwidth of the metamaterial antenna is proposed,based on using the Pearson Kernel as a standard *** with these new approaches,this paper suggests a unique hypersphere-based normalization to normalize the values of the dataset attributes and a dimensionality reduction method based on the Pearson kernel to reduce the dimension.A novel algorithm for optimizing the parameters of Convolutional Neural Network(CNN)based on improved bat Algorithm-based Optimization with Pearson Mutation(BAO-PM)is also presented in this *** prediction results of the proposed work are better when compared to the existing models in the literature.

关键词： Antenna pearson optimization bandwidth metamaterial

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世界第一名餐厅什么样？让人吃哭了的美食哲学与情感魔法

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环球人文地理 2024年第13期 62-67页

作者：王洁 Francesc Guillamet Ernest Abentin joan Valera

万众瞩目的 2024世界50佳餐厅榜单揭晓，西班牙Disfrutar餐厅摘得桂冠！Disfrutar可译为“享受”，店如其名，这里呈献的美食体验堪称全球之最，每一口，都是对味蕾边界的惊喜探索。北京时间2024年6月6日，最受美食界瞩目和认可的国际...

万众瞩目的 2024世界50佳餐厅榜单揭晓，西班牙Disfrutar餐厅摘得桂冠！Disfrutar可译为“享受”，店如其名，这里呈献的美食体验堪称全球之最，每一口，都是对味蕾边界的惊喜探索。北京时间2024年6月6日，最受美食界瞩目和认可的国际榜单——“The World’s 50 Best Restaurants（世界50佳餐厅）”公布了今年的排名，位于西班牙巴塞罗那的米其林三星餐厅Disfrutar荣登榜首！

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