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Flexible and ultrathin dopamine modified MXene and cellulose nanofiber composite films with alternating multilayer structure for superior electromagnetic interference shielding performance

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Frontiers of physics 2023年第3期18卷 155-166页

作者： Qiugang Liao Hao Liu Ziqiang Chen Yinggan Zhang Rui Xiong Zhou Cui Cuilian Wen Baisheng sa Multiscale Computational Materials Facility and Key Laboratory of Eco-materials Advanced TechnologyCollege of Materials Science and EngineeringFuzhou UniversityFuzhou 350100China College of Materials Fujian Provincial Key Laboratory of Theoretical and Computational ChemistryXiamen UniversityXiamen 361005China

With the development of modern electronics,especially the next generation of wearable electromagnetic interference(EMI)shielding materials requires flexibility,ultrathin,lightweight and robustness to protect electronic devices from radiation *** this work,the flexible and ultrathin dopamine modified MXene@cellulose nanofiber(DM@CNF)composite films with alternate multilayer structure have been developed by a facile vacuum filtration induced self-assembly *** multilayered DM@CNF composite films exhibit improved mechanical properties compared with the homogeneous DM/CNF *** adjusting the layer number,the multilayered DM3@CNF2 composite film exhibits a tensile strength of 48.14 MPa and a toughness of 5.28 MJ·m^(–3) with a thickness about 19μ*** that,the DM@CNF film with annealing treatment achieves significant improvement in conductivity(up to 17264 S·m^(–1))and EMI properties(se of 41.90 dB and Sse/t of 10169 dB·cm^(2)·g–1),which still maintains relatively high mechanical *** is highlighted that the ultrathin multilayered DM@CNF film exhibits superior EMI shielding performance compared with most of the metal-based,carbon-based and MXene-based shielding materials reported in the *** results will offer an appealing strategy to develop the ultrathin and flexible MXene-based materials with excellent EMI shielding performance for the next generation intelligent protection devices.

关键词： MXene dopamine cellulose nanofibers electromagnetic interference shielding performance mechanical properties

Helicobacter species and gut bacterial DNA in Meckel's diverticulum and the appendix

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World Journal of Gastroenterology 2011年第36期17卷 4104-4108页

作者： Peren H Karagin Unne Stenram Torkel Wadstrm sa Ljungh Department of Medical Microbiology Lund UniversityS lvegatan 23SE-223 62 LundSweden Department of Pathology Lund UniversitySE-22185 LundSweden

AIM:To analyse the possible association of various Helicobacter species and certain common gut bacteria in patients with Meckel's diverticulum and ***:A nested-polymerase chain reaction (PCR),specific to 16S rRNA of the Helicobacter genus,was performed on paraffin embedded samples,50 with acute appendicitis,50 normal appendixes,and 33 Meckel's diverticulum with gastric heterotopia and/or *** genus positive samples were sequenced for species *** samples were also analysed for certain gut bacteria by ***:Helicobacter pullorum DNA was found in one out of 33 cases and Enterobacteria in two cases of Meckel's *** pylori (***) was found in three,Enterobacter in 18,and Bacteroides in 19 out of 100 appendix samples by *** was not found in any MD or appendix *** *** positive cases were from normal ***:Helicobacter is not an etiological agent in the pathogenesis of symptomatic Meckel's diverticulum or in acute appendicitis.

关键词：幽门螺杆菌肠道细菌 DNA 巢式聚合酶链反应菌种 rRNA基因物种鉴定 PCR

Coprophilous contributions to the phylogeny of Lasiosphaeriaceae and allied taxa within Sordariales(Ascomycota,Fungi)

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Fungal Diversity 2015年第1期70卷 101-113页

作者： Åsa Kruys sabine M.Huhndorf Andrew N.Miller Systematic Biology Department of Organismal BiologyEvolutionary Biology CentreUppsala UniversityNorbyvägen 18DSE-75236 UppsalaSweden Botany Department Field MuseumChicagoIL 60605USA Illinois Natural History Survey University of IllinoisChampaignIL 61820US

The phylogenetic relationships of Lasiosphaeriaceae are complicated in that the family is paraphyletic and includes Sordariaceae and Chaetomiaceae,as well as several polyphyletic *** study focuses on the phylogenetic relationships of the coprophilous genera,Anopodium,Apodospora,Arnium,Fimetariella and *** are traditionally circumscribed based on ascospore characters,which have proven homoplasious in other genera within the *** results based on LSU nrDNA andß–tubulin sequences distinguish four lineages of Lasiosphaeriaceae *** joins the clade of mor-phologically similar,yellow-pigmented species of Cercophora and *** is monophyletic and joins a larger group of taxa with unclear affinities to each other,while Arnium is polyphyletic being scattered throughout three of the four major clades of *** is represented by a single collection and joins the clade containing Cercophora scortea and Podospora *** shows affinities to the Lasiosphaeris *** on a combination of morphological and molecular data,Echria *** recognized at the genus level for the former Arnium section and two new combinations are proposed:*** and ***.

关键词： Ascomal wall Ascomycete β-tubulin LSU nrDNA Systematics,Taxonom

High-precision geochronology of Mesozoic magmatism in Macao,Southeast China:Evidence for multistage granite emplacement

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Geoscience Frontiers 2020年第1期11卷 243-263页

作者： Pedro Quelhas Agata Alveirinho Dias Joao Mata Donald Wayne Davis Maria Luísa Ribeiro Institute of Science and Environment University of Saint JosephMacaoChina Instituto Dom Luiz Faculdade de CiênciasUniversidade de LisboaLisboaPortugal Jack satterly Geochronology Laboratory Department of Earth SciencesUniversity of TorontoTorontoOntCanada Laboratório Nacional de Engenharia e Geologia LisboaPortugal

Six new high precision U-Pb zircon ID-TIMS ages plus thirteen in situ high spatial resolution U-Pb zircon LA-MC-ICPMS ages are reported from Jurassic plutonic(metaluminous to weakly peraluminous biotite granites)and Jurassic to Cretaceous hypabyssal(dacites)rocks from *** its relatively small area(~30 km^2),the new ages tightly constrain the Macao granitic magmatism to two periods ranging from 164.5±0.6 Ma to 162.9±0.7 Ma and 156.6±0.2 Ma to 155.5±0.8 Ma,separated by ca.6 *** zircons point to the existence of a basement with ages up to Paleo-Proterozoic and late Archean in the *** addition,younger dacitic rocks were dated at 150.6±0.6 Ma andse is also represented in Hong Kong and Southeast(se)China,while magmatism with the chemical characteristics of the second pulse seems to not be represented outside *** two granitic magmatic pulses have distinct mineralogical and geochemical features that support their discrete nature rather than a continuum of comagmatic activity and suggest that the Macao granitic suite was incrementally assembled during a period of ca.9 Ma,a hypothesis also extendable to the neighboring Hong Kong region for a time lapse of ca.24 *** Macao,the transition from granitic magmatism(Middle to Upper Jurassic)to the younger dacite dykes(Upper Jurassic to Lower Cretaceous)most likely corresponds to a change in the regional tectonic setting,from an extensional regime related with foundering of the subducting paleoPacific plate during the Early Yanshanian period to the reestablishment of a normal subduction system in se China during the Late Yanshanian period.

关键词： Granites UePb geochronology Zircon Jurassic Yanshanian orogeny Macao

Impact of time to diagnosis on the occurrence of cardiogenic shock in MIS‑C post‑COVID-19 infection

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World Journal of Pediatrics 2023年第6期19卷 595-604页

作者： said Bichali Mathilde Bonnet Marie‑Emilie Lampin Jean‑Benoit Baudelet Heloise Reumaux Olivia Domanski Thameur Rakza Alexandre Delarue Morgan Recher Jerome Soquet Francois Dubos Stephane Leteurtre Ali Houeijeh Francois Godart Pediatric Cardiology Univ.LilleCHU Lille2 Avenue Oscar Lambret59000 LilleFrance Pediatric Intensive Care Univ.LilleCHU Lille59000 LilleFrance ULR 2694‑Metrics:Evaluation des Technologies de sante et des Pratiques Medicales Univ.Lille59000 LilleFrance Pediatric Rhumatology Univ.LilleCHU Lille59000 LilleFrance Cardiac Surgery Univ.LilleCHU Lille59000 LilleFrance Pediatric Emergency Univ.LilleCHU Lille59000 LilleFrance

Background In multisystem inflammatory syndrome in children(MIS-C),diagnostic delay could be associated with *** study aims to measure the time to diagnosis in MIS-C,assess its impact on the occurrence of cardiogenic shock,and specify its *** A single-center prospective cohort observational study was conducted between May 2020 and July 2022 at a tertiary care *** meeting the World Health Organization MIS-C criteria were included.A long time to diagnosis was defined as six days or *** on time to diagnosis were collected by two independent *** primary outcome was the occurrence of cardiogenic *** regression and receiver operating characteristic curve analysis were used for outcomes,and a Cox proportional hazards model was used for *** Totally 60 children were assessed for inclusion,and 31 were finally analyzed[52%males,median age 8.8(5.7-10.7)years].The median time to diagnosis was 5.3(4.2-6.2)*** univariable analysis,age above the median,time to diagnosis,high C-reactive protein,and high N-terminal pro-B-type natriuretic peptide(NT-proBNP)were associated with cardiogenic shock[odds ratio(OR)6.13(1.02-36.9),2.79(1.15-6.74),2.08(1.05-4.12),and 1.70(1.04-2.78),respectively].In multivariable analysis,time to diagnosis≥6 days was associated with cardiogenic shock[adjusted OR(aOR)21.2(1.98-227)].Time to diagnosis≥6 days had a sensitivity of 89% and a specificity of 77% in predicting cardiogenic shock;the addition of age>8 years and NT-proBNP at diagnosis≥11,254 ng/L increased the specificity to 91%.Independent determinants of short time to diagnosis were agese of inotropes and

关键词： COVID-19 Delay in diagnosis Heart failure MIS-C saRS-CoV-2

Indigestible fraction of guava fruit:Phenolic profile,colonic fermentation and effect on HT-29 cells

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Food Bioscience 2022年第2期46卷 563-571页

作者： Francisco J.Blancas-Benitez Jara P´erez-Jim´enez JAdriana sa˜nudo-Barajas Nuria E.Rocha-Guzm´an Gustavo A.Gonz´alez-Aguilar Juscelino Tovar Sonia G.S´ayago-Ayerdi Tecnol´ogico Nacional de M´exico/Instituto Tecnol´ogico de Tepic Laboratorio Integral de Investigaci´on en AlimentosAv.Tecnol´ogico 2595CP 63175TepicNayaritMexico Institute of Food Science Technology and Nutrition(ICTAN-CSIC)Jos´e Antonio Novais 1028040MadridSpain Centro de Investigaci´on en Alimentaci´on y Desarrollo A.C.Unidad Culiac´an.ApdoPostal 32-A.80129Culiac´anSinaloaMexico Tecnol´ogico Nacional de M´exico/Instituto Tecnol´ogico de Durango Departamento de Ingenierías Química y Bioquímica BlvdFelipe Pescador 1830Ote.Col.Nueva VizcayaCP 3408078000DurangoDgo.Mexico Coordinaci´on de Tecnología de Alimentos de Origen Vegetal Lab.de Antioxidantes y Alimentos FuncionalesCentro de Investigaci´on en Alimentaci´on y DesarrolloA.C.Carretera a la Victoria Km 0.6Col.La VictoriaHermosillo Sonora83000Mexico Department of Food Technology Engineering and NutritionLund UniversityP.O.Box 124SE-22100LundSweden

Guava fruit is rich in phenolic compounds(PCs),whose metabolic fate has not been ***-digestible carbohydrates and PCs in whole guava(WG)and seedless guava(SG)were submitted to an in vitro colonic fermentation,followed by evaluation of the anti-proliferative activity of the fermentation extracts in HT-29 cancer cell *** main PCs in both samples were(+)-gallocatechin and gallic acid,while procyanidin B was the most abundant one associated with soluble indigestible fraction and quercetin predominated in the insoluble indigestible *** fermentability index at 24 h was 78.84%in WG and 84.74%for SG,near to the value for raffinose used as reference,with butyric acid as the main short chain fatty acids(SCFA)*** greatest antiproliferative effects were observed in the SG at 12 h of fermentation and WG at 24 h of *** results allow to suggest consumption of guava fruit,either with or without seeds,as a feasible way to maintain colonic health.

关键词： Short chain fatty acids(SCFA) Phenolic compounds Indigestible fraction In vitro colonic fermentation Antiproliferative Psidium guajava L

Is hydrotherapy an appropriate form of exercise for elderly patients with biventricular systolic heart failure?

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Journal of Geriatric Cardiology 2012年第4期9卷 408-410页

作者： Bente Grüer Sve 1v Margareta Scharin T ng sa Cider The Wallenberg Laboratory Department of Molecular and Clinical Medicine Institute of Medicine at Sahlgrenska Academy University of Gothenburg Bruna Str ket 16 SE-413 45 Gothenburg Sweden Physiotherapy and Occupational Department Institute of Neuroscience and Physiology/Physiotherapy at Sahlgrenska Academy University of Gothenburg Vita straket 13 SE-413 45 Gothenburg Sweden

Hydrotherapy (exercise in warm water) is considered to be a safe and beneficial method to use in the rehabilitation of stable heart failure patients, but there is little information on the effect of the increased venous return and enhanced preload in elderly patientswith biventricular heart failure. We present a case of an elderly man whowas recruited to participate in a hydrotherapy study. We compared echocardiographic data duringwarm water immersion with land measurements, and observed increases in stroke volume from 32 mL (land) to 42 mL (water), left ventricular ejection fraction from 22% to 24%, left ventricular systolic velocity from 4.8 cm/s to 5.0 cm/s and left atrioventricular plane displacement from 2.1 mm to 2.2 mm. By contrast, right ventricular systolic velocity decreased from 11.2 cm/s to 8.4 cm/s and right atrioventricular plane displacement from 8.1 mm to 4.7 mm. The tricuspid pressure gradient rose from 18 mmHg on land to 50mmHg during warm water immersion. Thus, although left ventricular systolic function was relatively unaffected during warm water immersion, we observed a decrease in right ventricular function with an augmented right ventricular pressure. We recommend further investigations to observe the cardiac effect of warm water immersion on patients with biventricular systolic heart failure and at risk of elevated right ventricular pressure.

关键词： Echocardiography Heart failure Hydrotherapy Pulmonary hypertension

TDDFT Studies of Electronic Structure and First Hyperpolarizability of Tetra-nuclear Cubane-like Transition Metal Clusters

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Chinese Chemical Letters 2002年第12期13卷 1205-1208页

作者： Rong Jian sa Ke Chen WU Ping LIU Chen Sheng LIN Chao Yong MANG State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002 The Graduate school of the Chinese Academy of Sciences Beijing 100036

The TDDFT method is first applied in a series of tetra-nuclear transition metal clusters studies for nonlinear optical properties. The results indicate that the charge transfer inside the metal core [MCu3X4] (M=W, Mo; X=S, O, Cl, se, Br) makes contribution to the optical nonlinearity. It is possible to enhance the hyperpolarizability by substituting the ligands of the clusters.

关键词： Nonlinear optical properties transition metal clusters TD- DFT method.

构建分级结构碳包覆的MoSse纳米片/多孔碳微球复合材料显著提升储钾性能

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Science Bulletin 2022年第9期67卷 933-945,M0004页

作者： Mengting Cai Hehe Zhang Yinggan Zhang Bensheng Xiao Lei Wang Miao Li Ying Wu Baisheng sa Honggang Liao Li Zhang Shuangqiang Chen Dong-Liang Peng Ming-Sheng Wang Qiaobao Zhang Department of Materials Science and Engineering College of MaterialsXiamen UniversityXiamen 361005China Department of Chemical Engineering School of Environmental and Chemical EngineeringShanghai UniversityShanghai 200444China School of Materials and Energy Lanzhou UniversityLanzhou 730000China College of Chemistry and Chemical Engineering Xiamen UniversityXiamen 361005China Key Laboratory of Eco-materials Advanced Technology College of Materials Science and EngineeringFuzhou UniversityFuzhou 350108China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361005China

研发能够有效缓解储钾过程中巨大的体积变化和加快反应动力学的先进负极材料,对于钾离子电池的实际应用至关重要.为此,本文报道了一种新颖分级结构薄层碳包覆的MoSse纳米片/多孔碳微球复合负极材料Cs@MoSse@C,能够显著提升储钾性能.在... 详细信息

研发能够有效缓解储钾过程中巨大的体积变化和加快反应动力学的先进负极材料,对于钾离子电池的实际应用至关重要.为此,本文报道了一种新颖分级结构薄层碳包覆的MoSse纳米片/多孔碳微球复合负极材料Cs@MoSse@C,能够显著提升储钾性能.在这种新颖结构中,多孔碳微球骨架上锚定的分级MoSse纳米片具有较大的层间距和丰富的阴离子空位,有利于钾离子的快速嵌入、脱出,并能提供丰富的钾离子存储活性位点.同时,薄碳层和高度多孔的碳微球骨架可有效缓解充放电过程中体积膨胀和加快反应动力学,并维持电极结构稳定性.因此,研发的Cs@MoSse@C负极材料及其组配的全电池都表现出了优异的循环稳定性和出色的倍率性能.此外,通过原位透射电镜技术、原位拉曼技术和非原位显微技术结合理论模拟揭示了其嵌入-转化反应储钾机理和获得优异电化学性能的本质原因.该工作为高性能过渡金属硫族化合物储钾负极材料的构筑与性能优化提供了实验依据和新策略.

关键词：负极材料充放电过程分级结构过渡金属硫族化合物电化学性能电极结构转化反应钾离子