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纳米金/单壁碳纳米管复合物的制备、表征及其多相催化的潜力(英文)

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新型炭材料 2011年第5期26卷 347-355页

作者： Anne E.Shanahan james A.Sullivan Mary McNamara hugh j.byrne School of Chemical and Pharmaceutical Sciences Dublin Institute of TechnologyKevin St. Dublin 8Republic of Ireland FOCAS Research Institute Dublin Institute of TechnologyCamden Row Dublin 8Republic of Ireland UCD School of Chemistry and Chemical Biology BelfieldDublin 4Republic of Ireland

制备了一种单壁碳纳米管担载金纳米颗粒复合材料,利用X射线衍射、扫描透射显微镜、能量色散X射线分析、比表面积分析、激光拉曼光谱和紫外-可见分光光度计等对其结构进行了表征。结果表明:纳米金粒为微晶体,其平均直径为7nm且直径分布... 详细信息

制备了一种单壁碳纳米管担载金纳米颗粒复合材料,利用X射线衍射、扫描透射显微镜、能量色散X射线分析、比表面积分析、激光拉曼光谱和紫外-可见分光光度计等对其结构进行了表征。结果表明:纳米金粒为微晶体,其平均直径为7nm且直径分布范围较窄。研究了该单壁碳纳米管担载金颗粒对仲醇的无溶剂氧化的活性和选择性,发现其转化效率可达95%。

关键词：单壁碳纳米管纳米金复合物催化作用

单壁纳米管与对三联苯的交互作用及其束散现象(英文)

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新型炭材料 2009年第1期24卷 73-82页

作者： Theresa G.Hedderman Anika S.Mostaert Anne E.Shanahan hugh j.byrne Focas Institute Dublin Institute of TechnologyKevin Street Conway Institute of Biomolecular and Biomedical Research University College Dublin

研究了单壁纳米管(SWCNT)与对三联苯(p-Terphenyl)分子的交互作用和束散现象。SWCNTs分别由电弧放电法和一氧化碳高压分解法(Hipco法)制备。比较了不同制备工艺及纯化处理后SWCNTs与p-Terphenyl交互作用及其束散程度。采用分光和显微镜... 详细信息

研究了单壁纳米管(SWCNT)与对三联苯(p-Terphenyl)分子的交互作用和束散现象。SWCNTs分别由电弧放电法和一氧化碳高压分解法(Hipco法)制备。比较了不同制备工艺及纯化处理后SWCNTs与p-Terphenyl交互作用及其束散程度。采用分光和显微镜等技术,探讨了SWCNTs及其与p-Terphenyl交互作用。应用X光能量消散(EDAX)技术,给出了纯化处理前后SWCNTs试样的元素分析。利用萤光分析和原子显微镜技术评估了SWCNTs交互作用及束散程度。研究显示:SWCNTs束散程度及其和p-Terphenyl交互作用的强弱与SWCNTs纯化程度有关.

关键词：萤光单壁纳米管对三联苯 AFM XRD

Predictors of the placebo response in a nutraceutical randomized controlled trial for depression

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journal of Integrative Medicine 2024年第1期22卷 46-53页

作者： Rosemary Arnold jenifer Murphy-Smith Chee H.Ng David Mischoulon Gerard j.byrne Chad A.Bousman Con Stough Michael Berk jerome Sarris Professorial Unit the Melbourne ClinicDepartment of PsychiatryUniversity of MelbourneRichmond 3121Australia Depression Clinical and Research Program Department of PsychiatryMassachusetts General HospitalHarvard Medical SchoolBostonMA 02115USA Faculty of Medicine Discipline of PsychiatryCentre for Clinical ResearchRoyal Brisbane&Women’s HospitalHerstonthe University of QueenslandBrisbane 4006Australia Departments of Medical Genetics PsychiatryPhysiology&Pharmacology and Community Health SciencesUniversity of CalgaryCalgaryAB T2N 1N4Canada Department of Psychiatry the University of MelbourneMelbourne 3052Australia Centre for Human Psychopharmacology Swinburne UniversityMelbourne 3122Australia The Institute for Mental and Physical Health and Clinical Translation School of MedicineBarwon HealthDeakin UniversityGeelong 3220Australia The Centre of Excellence in Youth Mental Health the University of MelbourneParkville 3052Australia Florey Institute of Neuroscience and Mental Health the University of MelbourneParkville 3052Australia NICM Health Research Institute Western Sydney UniversityWestmeadNSW 2145Australia

Objective The placebo response in depression studies is the change in symptoms amongst those who receive an inactive *** well-designed randomized controlled trials(RCTs)of depression have a high proportion of placebo responders,with little understanding as to *** present study assesses characteristics associated with the placebo response in a nutraceutical trial with a large proportion of placebo *** This is a secondary analysis of a nutraceutical depression RCT which identified no overall treatment benefit relative to placebo(n=69 in placebo group).We investigated participant characteristics such as socio-demographics,clinical features,and recruitment methods,and their association with the placebo *** genetic polymorphisms were also *** response was measured based on change in Montgomery-Asberg Depression Rating Scale *** association of these hypothesis-driven variables of interest and the placebo response was examined using linear mixed effects *** Greater levels of education,particularly pursuing post-high school education,better self-reported general health,marriage/de facto,greater improvement in the first trial week,and more failed antidepressant therapies in the current depressive episode were associated with greater placebo *** increased placebo response was not found in those recruited via social media nor in those with concomitant antidepressant *** nucleotide polymorphisms from the tryptophan hydroxylase 1(TPH1)gene(A779C and A218C)were weakly associated with greater placebo response,although the evidence was attenuated after accounting for multiple *** This is,to our knowledge,the first study within nutraceutical research for depression to assess the association between participant characteristics and variation in the placebo *** variables appeared to predict the placebo *** findings may encourage future trial design

关键词： Randomized controlled trial Placebo Depression Nutraceutical Psychiatry

Blood metal concentrations and cardiac structure and function in total joint arthroplasty patients

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World journal of Orthopedics 2024年第8期15卷 773-782页

作者： Peter C Brennan Stephanie M Peterson Thomas j O'byrne Mariana L Laporta Cody C Wyles Paul j jannetto Garvan C Kane Maria Vassilaki Hilal Maradit Kremers Department of Orthopedic Surgery Mayo ClinicRochesterMN 55905United States Department of Quantitative Health Sciences Mayo ClinicRochesterMN 55905United States Department of Anesthesiology and Perioperative Medicine Mayo ClinicRochesterMN 55905United States Department of Laboratory Medicine and Pathology Mayo ClinicRochesterMN 55905United States Department of Cardiovascular Diseases Mayo ClinicRochesterMN 55905United States

BACKGROUND There is concern regarding potential long-term cardiotoxicity with systemic distribution of metals in total joint arthroplasty(TjA)*** To determine the association of commonly used implant metals with echocardiographic measures in TjA *** The study comprised 110 TjA patients who had a recent history of high chromium,cobalt or titanium *** underwent two-dimensional,three-dimensional,Doppler and speckle-strain transthoracic echocardiography and a blood draw to measure metal *** and sex-adjusted linear and logistic regression models were used to examine the association of metal concentrations(exposure)with echocardiographic measures(outcome).RESULTS Higher cobalt concentrations were associated with increased left ventricular end-diastolic volume(estimate 5.09;95%CI:0.02-10.17)as well as left atrial and right ventricular dilation,particularly in men but no changes in cardiac *** titanium concentrations were associated with a reduction in left ventricle global longitudinal strain(estimate 0.38;95%CI:0.70 to 0.06)and cardiac index(estimate 0.08;95%CI,-0.15 to-0.01).CONCLUSION Elevated cobalt and titanium concentrations may be associated with structural and functional cardiac changes in some *** studies are warranted to better understand the systemic effects of metals in TjA patients.

关键词： Total joint arthroplasty Metal-on-metal Cardiotoxicity Heart failure Echocardiography Cobalt

Discrete element modelling of the quasi-static uniaxial compression of individual infant formula agglomerates

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Particuology 2012年第5期10卷 523-531页

作者： Kevin j.Hanley Catherine O'Sullivan Edmond P.byrne Kevin Cronin Department of Process and Chemical Engineering University College CorkCorkIreland Department of Civil and Environmental Engineering Skempton BuildingImperial College LondonLondon SW7 2AZ United Kingdom

Infant formula is usually produced in an agglomerated powder form. These agglomerates are subjected to many transient forces following their manufacture. These can be difficult to quantify experimentally because of their small magnitudes and short durations, Numerical models have the potential to address this gap in the experimental data. The objective of the research described here was to calibrate a discrete element model for these agglomerates using experimental data obtained for quasi-static loading, and to use this model to study the mechanics of the particle response in detail. The Taguchi method was previously proposed as a viable calibration approach for discrete element models. In this work, the method was assessed for calibration of the model parameters （e.g., bond stiffnesses and strengths） considering three responses： the force at failure, strain at failure and agglomerate stiffness. The Weibull moduli for the simulation results and the experimental data were almost identical following calibration and the 37% characteristic stresses were similar. An analysis of the energy terms in the model provided useful insight into the model response. The bond energy and the normal force exerted on the platens were strongly correlated, and bond breakage events coincided with the highest energy dissipation rates.

关键词： Discrete element modellingUniaxial compressionQuasi-static crushingSimulationGranular materialsTaguchi methods

ANALYSES OF RECENT GEOMORPHIC EVOLUTION OF GARGATHY INLET, EASTERN SHORE OF VIRGINIA, U. S. A.

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Chinese journal of Oceanology and Limnology 1992年第1期10卷 9-22页

作者：张乔民 R.j.byrne G.R.Thomas South China Sea Institute of Oceanology Academia Sinica Guangzhou 510301 Virginia Institute of Marine Science VA 23062 U.S.A

Uargathy Inlet is a small natural tidal inlet in the northern region ol the Virginia Darner island chain. It is 100 m wide with a throat cross-sectional area of 384m2 and an average tidal prism of 6.47 x 106 m3. The inside drainage system is 7.8 km long and 2.2km wide. The main channels comprise 5.8% of the area, shallow lagoons 19.8%, and Spartina marshes 74.4% in 1970. Over the period 1851 - 1989 the inlet narrowed and migrated northward while maintaining a weakening downdrift offset. The nearby barrier island coastline’s rapid retreat (average rate 4.78m /a, 138 years retreat 660 m) was accompanied by back barrier channel and lagoon filling and a decrease in intertidal water volume which was probably the main reason for the entrance narrowing. The northward migration of the inlet was related to the dredging of the Inside Passage (before 1949) and the breaching of southern Metompkin Island (since 1957) connected with the inlet system. This altered the interior tidal circulation and likely shifted

关键词： geomorphic evolution Gargathy Inlet

Roles for the VCP co-factors Npl4 and Ufd1 in neuronal function in Drosophila melanogaster

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journal of Genetics and Genomics 2017年第10期44卷 493-501页

作者： Dwayne j.byrne Mark j.Harmon jeremy C.Simpson Craig Blackstone Niamh C. O'Sullivan UCD School of Biomolecular and Biomedical Science UCD Conway Institute University College Dublin Dublin 4 Ireland UCD School of Biology and Environmental Science UCD Conway Institute of Biomolecular and Biomedical Research University College Dublin Dublin 4Ireland Cell Biology Section Neurogenetics Branch National Institute of Neurological Disorders and Stroke National Institutes of Health Bethesda MD 20892 USA

The VCP-Ufd1-Npl4 complex regulates proteasomal processing within cells by delivering ubiquitinated proteins to the proteasome for *** in VCP are associated with two neurodegenerative diseases,amyotrophic lateral sclerosis（ALS） and inclusion body myopathy with Paget＇s disease of the bone and frontotemporal dementia（IBMPFD）,and extensive study has revealed crucial functions of VCP within *** contrast,little is known about the functions of Npl4 or Ufd1 in *** neuronalspecific knockdown of Npl4 or Ufd1 in Drosophila melanogaster,we infer that Npl4 contributes to microtubule organization within developing motor ***,Npl4 RNAi flies present with neurodegenerative phenotypes including progressive locomotor deficits,reduced lifespan and increased accumulation of TAR DNA-binding protein-43 homolog（TBPH）.Knockdown,but not overexpression,of TBPH also exacerbates Npl4 RNAi-associated adult-onset neurodegenerative *** contrast,we find that neuronal knockdown of Ufd1 has little effect on neuromuscular junction（NMj） organization,TBPH accumulation or adult *** findings suggest the differing neuronal functions of Npl4 and Ufd1 in vivo.

关键词： Proteasome TDP-43 accumulation Neurodegeneration Drosophila

Self-assembled bright luminescent hierarchical materials from a tripodal benzoate antenna and heptadentate Eu(III) and Tb(III) cyclen complexes

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Frontiers of Chemical Science and Engineering 2019年第1期13卷 171-184页

作者： Aramballi j.Savyasachi David F.Caffrey Kevin byrne Gerard Tobin Bruno D'Agostino Wolfgang Schmitt Thorfinnur Gunnlaugsson School of Chemistry and Trinity Biomedical Sciences Institute (TBSI) University of Dublin Trinity College Dublin Dublin 2 Ireland School of Chemistry and Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) University of Dublin Trinity College Dublin Dublin 2 Ireland

The europium heptadentate coordinatively unsaturated (Eu(III)) and the terbium (Tb(III)) 1,4,7,10-tetraazacyclododecane (cyclen) complexes 1 and 2 were used in conjunction with ligand 3 (1,3,5-benzene-trisethynylbenzoate) to form the supramolecular self-assembly structures 4 and 5;this being investigated in both the solid and the solution state. The resulting self-assemblies gave rise to metal centered emission (both in the solid and solution) upon excitation of 3, confirming its role as a sensitizing antenna. Drop-cased examples of ligand 3, and the solid forms of 4 and 5, formed from both organic and mixture of organic-aqueous solutions, were analyzed using Scanning Electron Microscopy, which showed significant changes in morphology;the ligand giving rise to one dimensional structures, while both 4 and 5 formed amorphous materials that were highly dense solid networks containing nanoporous features. The surface area (216 and 119 m2·g^-1 for 4 and 5 respectively) and the ability of these porous materials to capture and store gases such as N2 investigated at 77 K. The self-assembly formation was also investigated in diluted solution by monitoring the various photophysical properties of 3–5. This demonstrated that the most stable structures were that consisting of a single antennae 3 and three complexes of 1 or 2 (e.g., 4 and 5) in solution. By monitoring the excited state lifetimes of the Eu(III) and Tb(III) ions in H2O and D2O respectively, we showed that their hydration states (the q-value) changed from -2 to 0, upon formation of the assemblies, indicating that the three benzoates of 3 coordinated directly to the each of the three lanthanide centers. Finally we demonstrate that this hierarchically porous materials can be used for the sensing of organic solvents as the emission is highly depended on the solvent environment;the lanthanide emission being quenched in the presence of acetonitrile and THF, but greatly enhanced in the presence of methanol.

关键词： self-assembly supramolecular chemistry lanthanides Eu(III) and Tb(III) complexes luminescence metallostars

Recovery of threatened plant species and their habitats in the biodiversity hotspot of the Southwest Australian Floristic Region

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Plant Diversity 2019年第2期41卷 59-74页

作者： Leonie Monks Sarah Barrett Brett Beecham Margaret byrne Alanna Chant David Coates j.Anne Cochrane Andrew Crawford Rebecca Dillon Colin Yates Biodiversity and Conservation Science Department of Biodiversity Conservation and Attractions Parks and Wildlife Service Department of Biodiversity Conservation and Attractions

The Southwest Australian Floristic Region(SWAFR) is a global biodiversity hotspot with high plant diversity and endemism and a broad range of threatening processes. An outcome of this is a high proportion of rare and threatened plant species. Ongoing discovery and taxonomic description of new species, many of which are rare, increases the challenges for recovery of threatened species and prioritisation of conservation actions. Current conservation of this diverse flora is based on integrated and scientific evidence-based management. Here we present an overview of current approaches to the conservation of threatened flora in the SWAFR with a focus on active management through recovery and restoration that is integrated with targeted research. Key threats include disease, fragmentation, invasive weeds, altered fire regimes, grazing, altered hydro-ecology and climate change. We highlight the integrated approach to management of threats and recovery of species with four case studies of threatened flora recovery projects that illustrate the breadth of interventions ranging from In situ management to conservation reintroductions and restoration of threatened species habitats. Our review and case studies emphasise that despite the scale of the challenge, a scientific understanding of threats and their impacts enables effective conservation actions to arrest decline and enhance recovery of threatened species and habitats.

关键词： Threatened species Threatening processes Conservation Recovery Restoration Biodiversity hotspot