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Exfoliation of bulk 2H-MoS_(2)into bilayer 1T-phase nanosheets via ether-induced superlattices

Nano Research 2024年第6期17卷 5705-5711页

作者： Xiuling Shi Dongmei Lin Zhuorui Xiao Yibo Weng Hanxiang Zhou Xiaoying long Zhiyu Ding Fuyuan Liang Yan Huang Guohua Chen Kaikai Li Tong-Yi Zhang School of Materials Science and Engineering Harbin Institute of TechnologyShenzhen 518055China Department of Mechanical Engineering Research Institute for Smart EnergyThe Hong Kong Polytechnic UniversityHong KongChina School of Energy and Environment City University of Hong KongTat Chee AvenueKowloonHong KongChina The Hong Kong University of Science and Technology(Guangzhou) Guangzhou Municipal Key Laboratory of Materials InformaticsAdvanced Materials Thrust and Sustainable Energy and Environment ThrustNanshaGuangzhou 511400China

The exfoliation of bulk 2H-molybdenum disulfide(2H-MoS_(2))into few-layer nanosheets with 1T-phase and controlled layers represents a daunting challenge towards the device applications of MoS_(2).Conventional ion intercalation assisted exfoliation needs the use of hazardous n-butyllithium and/or elaborate control of the intercalation potential to avoid the decomposition of the MoS_(2).This work reports a facile strategy by intercalating Li ions electrochemically with ether-based electrolyte into the van der Waals(vdW)channels of MoS_(2),which successfully avoids the decomposition of MoS_(2)at low *** co-intercalation of Li+and the ether solvent into MoS_(2)makes a first-order phase transformation,forming a superlattice phase,which preserves the layered structure and hence enables the exfoliation of bulk 2H-MoS_(2)into bilayer nanosheets with *** with the pristine 2H-MoS_(2),the bilayer 1T-MoS_(2)nanosheets exhibit better electrocatalytic performance for the hydrogen evolution reaction(HER).This facile method should be easily extended to the exfoliation of various transition metal dichalcogenides(TMDs).

关键词： exfoliation of MoS_(2) phase transformations superlattices ether electrolyte hydrogen evolution reaction(HER)

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Clinical-based phenotypes in children with pediatric post-COVID-19 condition

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World Journal of Pediatrics 2024年第7期20卷 682-691页

作者： Lieke C.E.Noij Jelle M.Blankestijn Coen R.Lap Marlies A.van Houten Giske Biesbroek Anke-Hilse Maitland-van der Zee Mahmoud I.Abdel-Aziz Johannes B.van Goudoever Mattijs W.Alsem Caroline L.H.Brackel Kim J.Oostrom Simone Hashimoto Suzanne W.J.Terheggen-Lagro Department of Pediatric Pulmonology and Allergy Amsterdam UMCLocation AMCEmma Children’s HospitalAmsterdam University Medical CenterRoom G2-222Meibergdreef 91105AZAmsterdamThe Netherlands Department of Pulmonary Medicine Amsterdam UMCAmsterdamThe Netherlands Department of Pediatrics Spaarne GasthuisHoofddorpThe Netherlands Department of Pediatrics Emma Children’s HospitalAmsterdam University Medical CenterAmsterdamThe Netherlands Department of Rehabilitation Medicine Amsterdam Movement SciencesMeibergdreef 9AmsterdamThe Netherlands Department of Paediatric Pulmonology Department of PaediatricsTergooi MCHilversumThe Netherlands Department of Child and Adolescent Psychiatry and Psychosocial Care Amsterdam UMCAmsterdam Reproduction and DevelopmentAmsterdamThe Netherlands

Background Pediatric post coronavirus disease 2019(COVID-19)condition(PPCC)is a heterogeneous syndrome,which can significantly affect the daily lives of *** study aimed to identify clinically meaningful phenotypes in children with PPCC,to better characterize and treat this *** Participants were children with physician-diagnosed PPCC,referred to the academic hospital Amsterdam UMC in the Netherlands between November 2021 and March *** factors and information on post-COVID symptoms,comorbidities,and impact on daily life were *** clusters were identified using an unsupervised and unbiased approach for mixed data *** Analysis of 111 patients(aged 3–18 years)revealed three distinct clusters within *** 1(n=62,median age=15 years)predominantly consisted of girls(74.2%).These patients suffered relatively more from exercise intolerance,dyspnea,and smell *** 2(n=33,median age=13 years)contained patients with an even gender distribution(51.5%girls).They suffered from relatively more sleep problems,memory loss,gastrointestinal symptoms,and *** 3(n=16,median age=11 years)had a higher proportion of boys(75.0%),suffered relatively more from fever,had significantly fewer symptoms(median of 5 symptoms compared to 8 and 10 for clusters 1 and 2 respectively),and experienced a lower impact on daily *** This study identified three distinct clinical PPCC phenotypes,with variations in sex,age,symptom patterns,and impact on daily *** findings highlight the need for further research to understand the potentially diverse underlying mechanisms contributing to post-COVID symptoms in children.

关键词： Adolescents Clusters long COVID Pediatric Phenotypes Post-COVID syndrome

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SUPERCHARGED Express couriers meet China's ever-evolving need for delivery speed By Elsbeth van Paridon

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Beijing Review 2024年第5期67卷 12-15页

作者： Elsbeth van Paridon 不详

Jingdong ayi lai la!Or"The Jing Dongauntie is here!"in plain *** cheeks,unmistakably the result of spending a lot of time outdoors in the ice box that is Beijing winter,He Fang emerges from behind a long line of delivery karts,wrapped in several *** outer layer is a perfect match for the tiny three-wheeled vehicles:red and emblazoned with"JDL."The three letters stand for JD Logistics,the shipping and delivery arm of ***,launched in 2004 and now one of China's three key e-commerce players,together with Alibaba and PDD.

关键词： Express perfect winter

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Ethnic Euuphoria?A deep dive into the cultural curiosity of young Chinese

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Beijing Review 2024年第25期67卷 36-38页

作者： Elsbeth van Paridon 不详

"Hey,you're too *** need to fill you up!Don't you like it?!"Amid thecacophonyof jangling silver trinkets,traditional songs and the deep sonorous blasts of the lusheng,mouth organs fashioned from 6-meter-long bamboo pipes,this author crouches down and attempts to elegantly sip bowl after bowl of rice wine offered by a spirited women of the local Miao ethnic *** alert:Graceful consumption wasn't exactly the end result.

关键词： silver Grace pipes

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Critical behavior and Joule-Thomson expansion of charged AdS black holes surrounded by exotic fluid with modified Chaplygin equation of state

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Chinese Physics C 2024年第6期48卷 179-190页

作者：张梦瑶陈浩 Hassan Hassanabad 隆正文杨辉 School of Mathematics and Statistics Guizhou UniversityGuiyang 550025China School of Physics and Electronic Science Zunyi Normal UniversityZunyi 563006China Faculty of Physics Shahrood University of TechnologyShahroodIran Department of Physics University of Hradec KrálovéRokitanského 6250003 Hradec KrálovéCzechia College of Physics Guizhou UniversityGuiyang 550025China

By considering the concept of a unified single fluid model,referred to as modified Chaplygin gas(MCG),which amalgamates dark energy and dark matter,we explore the thermodynamic characteristics of charged anti-de Sitter(AdS)black holes existing in an unconventional fluid accompanied by *** accomplish this objective,we derive the equations of state by regarding the charge Q^(2) as a thermodynamic *** effects of MCG parameters on the critical thermodynamic quantities(ψ_(c),T_(c),Q_(c)^(2))are examined,followed by a detailed analysis of the Q^(2)-ψ *** provide a clearer explanation of the phase transition,we present an analysis of the Gibbs free *** is important to note that if the Hawking temperature exceeds the critical temperature,a distinct pattern is observed known as swallowtail *** indicates that the system undergoes a first-order phase transition from a smaller black hole to a larger *** critical exponent of the system is found to be in complete agreement with that of the van der Waals fluid ***,we investigate the impact of MCG parameters and black hole charge on Joule-Thomson(J-T)expansion in the extended phase *** J-T coefficient is examined to pinpoint the exact region experiencing cooling or heating,and the observation reveals that the presence of negative heat capacity results in the occurrence of a cooling *** impact of MCG on the inversion curve of charged black holes exhibits a striking resemblance to that observed in most multi-dimensional black hole *** addition,it is worth noting that certain parameters exert a significant influence on the ratio T_(min)/*** specific values of the MCG parameters,the ratio is consistent with the charged AdS black *** parametersγandβhave a non-negligible effect on the isenthalpic curve.

关键词： black hole dark matter dark energy phase transition Joule-Thomson expansion

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Added Resistance Acting on Hull of a Non Ballast Water Ship

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Journal of Marine Science and Application 2014年第1期13卷 11-22页

作者： ngo van He Yoshiho Ikeda Marine System Engineering Osaka Prefecture University Department of Ship Engineering and Fluid Mechanics Hanoi University of Science and Technology

In this paper, added resistances acting on a hull of non ballast water ship(NBS) in high waves is discussed. The non ballast water ships were developed at the laboratory of the authors at Osaka Prefecture University, Japan. In the present paper, the performances of three kinds of bow shapes developed for the NBS were theoretically and experimentally investigated to find the best one in high waves. In previous papers, an optimum bow shape for the NBS was developed in calm water and in moderated waves. For a 2 m model for experiments and computations, the wave height is 0.02 m. This means that the wave height is 15% of the draft of the ship in full load conditions. In this paper, added resistances in high waves up to 0.07 m for a 2 m model or 53% of the full load draft are investigated. In such high waves linear wave theories which have been used in the design stage of a ship for a long time may not work well anymore, and experiments are the only effective tool to predict the added resistance in high waves. With the computations for waves, the ship is in a fully captured condition because shorter waves, λ/Lpp<0.6, are assumed.

关键词： added resistance non ballast water ship hull optimum bow shape

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A bibliometric analysis and visualization of osteochondral lesions of talus (2004-2021)

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Medical Data Mining 2024年第3期7卷 17-25页

作者： Xiao-Jie Sun Shu-long Wang Zi-Dong Wang Zhao-Jun Chen The Third Affiliated Hospital of Beijing University of Chinese Medicine Beijing University of Chinese MedicineBeijing 100029China Department of Hand and Foot Surgery The Third Affiliated Hospital of Beijing University of Chinese MedicineBeijing 100029China School of Acupuncture-Moxibustion and Tuina Beijing University of Chinese MedicineBeijing 100029China

Background:Osteochondral lesions of the talus(OLTs)are a significant challenge for foot and ankle specialists,which could cause pain and decrease patient *** can use the findings of this study to shape future directions for research by exploring global trends and hotspots in ***:Web of Science Core Collection was used to retrieve literature related to OLT between 2004 and *** report covers the current state of OLTs,such as publications,journals,trends,hotspots,and the performances of relevant countries,institutions and *** co-citation analysis,the coauthorship analysis,the cooccurrence analysis,and the bibliographic coupling analysis were conducted with the Bibliometrix R package,VOSviewer v1.***.10.0,and CiteSpace ***:During an 18-year review,717 articles and 76 review articles on OLT published from 2004 to 2021 were *** USA has made the largest contribution to the OLT-related literature,and a significant contribution has been made by Kennedy JG(48/6.05%)and van Dijk CN(30/3.78%).In terms of total link strength,Foot&Ankle International was the leading *** showed that the global research hotspots of OLTs focused on the pathogenesis,diagnosis,clinical research,and surgical treatment of *** would be significant to pay close attention to future research on osteochondral autograft transplantation and management,surgery,multidisciplinary integration and mechanisms of OLT,and its related ***:The study provides information about the current status and hotspots of research in the domain of OLT over the past 18 years that will assist researchers in identifying potential perspectives on hot topics and research frontiers.

关键词： bibliometric analysis hotspots osteochondral lesions of the talus trends visualised analysis

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Antioxidant and anti-inflammatory roles of tea polyphenols in inflammatory bowel diseases

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Food Science and Human Wellness 2022年第3期11卷 502-511页

作者： van-long Truong Woo-Sik Jeong Food and Bio-industry Research Institute School of Food Science&BiotechnologyCollege of Agriculture and Life SciencesKyungpook National UniversityDaegu 41566Korea

Polyphenols,including phenolic acids,flavonoids,and procyanidins,are abundant in food and beverage derived from ***(Camellia sinensis)is particularly rich in polyphenols(e.g.,catechins,theaflavins,thearubigins,gallic acid,and flavonols),which are thought to contribute to the health benefits of *** intake of tea polyphenols has been described to prevent and/or attenuate a variety of chronic pathological conditions like cardiovascular diseases,neurodegenerative diseases,diabetes,and *** review focuses on established antioxidant and anti-inflammatory properties of tea polyphenols and underlying mechanisms of their involvement in inflammatory bowel diseases(IBD).Tea polyphenols act as efficient antioxidants by inducing an endogenous antioxidant defense system and maintaining intracellular redox *** polyphenols also regulate signaling pathways such as nuclear factor-κB,activator protein 1,signal transducer and activator of transcriptions,and nuclear factor E2-related factor 2,which are associated with IBD *** pieces of evidence have indicated that tea polyphenols enhance epithelial barrier function and improve gut microbial dysbiosis,contributing to the management of inflammatory ***,this study suggests that supplementation of tea polyphenols could prevent inflammatory conditions and improve the outcome of patients with IBD.

关键词： Antioxidant Anti-inflammation Epithelial barrier function Inflammatory bowel diseases Gut microbiota Tea polyphenols

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Bacterial Exofactors Modulate Biofilm Growth and Resistivity to Antimicrobial Drugs

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Advances in Microbiology 2024年第1期14卷 11-24页

作者： van Nguyen^# Bea Penaredondo^# Girdhari Rijal Department of Medical Laboratory Sciences Public Health and Nutrition Science College of Health Sciences Tarleton State University A Member of Texas A & M University System Fort Worth Texas USA

Some bacteria have the ability to co-exist, proliferate and survive in a multicellular community, biofilm. Each participating bacteria can form its colonies and encases itself by a self-produced insoluble extracellular matrix substance (EPS). Microcolonies within biofilm are held together by interactions and bonding of the substances present in the EPS with their separation from the water channels. Similar to insoluble EPS, bacterial microcolonies release soluble exofactors that have direct impacts on the survivability, growth and antibacterial resistivity of other microcolonies made of single- or multi-species bacteria in the same biofilm. How the exofactors of microcolonies of one-type bacteria impact on microcolonies of other-type bacteria is still unclear. We studied about the role of exofactors released from Escherichia coli, Staphylococcus aureus and Pseudomonas aeruginosa, which are common biofilm-forming pathogenic bacteria. Exofactors facilitate to transform the microenvironment where bacteria can acquire alternative lifestyle with a long survival period and resistivity to certain antimicrobial drugs.

关键词： Biofilm Exofactors Antimicrobial Drugs Growth Extracellular Matrix Substance Microcolonies

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Drought Tolerance and Recovery of the Sedge Carex planostachys (Cyperaceae) from Central Texas Woodlands

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American Journal of Plant Sciences 2024年第9期15卷 746-765页

作者： E. Rob Wayne Oscar William van Auken Natural Sciences Department St. Philips College San Antonio USA Department of Integrative Biology The University of Texas at San Antonio San Antonio USA

Carex planostachys Kunze (Cyperaceae, Cedar sedge) is an herbaceous species in a genus commonly inhabiting mesic or hydric habitats. Carex planostachys is found in arid and semi-arid Juniperus woodlands. Arid conditions impose survival challenges to plants in dry areas. Some plants have plasticity responses to soil water content and continued normal though reduced functions through droughts, but most herbaceous plants do not survive. Limited previous studies have suggested C. planostachys is tolerant of drought. Physiological responses of C. planostachys from Juniperus woodlands was examined is this study to determine how long plants could survive without water and if they are capable of recovery from very negative water potentials beyond what is considered the permanent wilting point for most herbaceous plants. Plants were placed in pots in partial shade in this experiment. Water loss from the soil with plants was an inverse 2nd order polynomial function with soil water decreasing from 32% to 8% by day 28 of the study. Leaf water potential was also an inverse 2nd order polynomial function but did not decline significantly until 14 days without watering. Leaf water potential was −10.0 MPa after 35 days without watering. Non-watered plants Anet, (photosynthetic rate) was significantly lower compared to the water treatment by day 21 as was stomatal conductance and transpiration. When non-watered plants were watered after 21, 28 or 35 days, full recovery of physiological responses occurred within 7 days. The length of time that C. planostachys was able to withstand drought was greater than the annual trends in lack of precipitation during springtime in this area. Carex planostachys can photosynthesize at water stress between −8 and −10 MPa. Carex planostachys drought and shade tolerance enables it to occupy an understory niche devoid of other herbaceous plants.

关键词： CO2 Uptake Conductance Gas Exchange Photosynthesis Respiration Transpiration Water Stress Water Potential.

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