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A near infrared spectroscopy calibration for the prediction of fresh grass quality on Irish pastures

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Information Processing in Agriculture 2022年第2期9卷 243-253页

作者： Darren J.Murphy Bernadette o’Brien Michael o’donovan Tomas Condon Michael D.Murphy Teagasc Animal&Grassland Research and Innovation CentreMooreparkFermoyCo.CorkIreland Department of Process Energy and Transport EngineeringMunster Technological UniversityCorkIreland

The aim of this study was to develop near infrared spectroscopy(NIRS)calibrations to predict quality parameters,dry matter(DM,g kg1)and crude protein(CP,g kg1 DM),in fresh un-dried *** of these parameters would enable more precise allocation of quality herbage to grazing *** ryegrass samples(n=1615)were collected over the 2017 and 2018 grazing seasons at Teagasc Moorepark to develop a NIRS calibration *** samples were collected for an independent validation dataset(n=197)during the 2019 grazing *** were scanned using a FoSS 6500 spectrometer at 2 nm intervals in the range of 1100~2500 nm and absorption was recorded as log 1/Reflec*** wet chemistry analysis was carried out for both parameters and the resultant data were calibrated against spectral data by means of modified partial least squares regression.A range of mathematical spectral treatments were examined for each calibration,which were ranked in order of standard error of prediction(SEP)and ratio of percent deviation(RPD).Best performing calibrations achieved high predictive precision for DM(R2=0.86 SEP=9.46 g kg1,RPD=2.60)and moderate precision for CP(R2=0.84 SEP=20.38 g kg1 DM,RPD=2.37).These calibrations will aid the optimisation of grassland management and the development of precision agricultural technologies.

关键词： Near infrared spectroscopy Fresh grass analysis Grassland management Grass quality Precision agriculture

Mycogenic Silver Nanoparticles From Endophytic Trichoderma atroviride with Antimicrobial Activity

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Journal of Renewable Materials 2020年第2期8卷 171-185页

作者： Ahmed Abdel-Azeem Amr A.Nada Anthonia o’donovan Vijay Kumar Thakur Amr Elkelish Microbiology Section Department of BotanyFaculty of ScienceUniversity of Suez CanalIsmailia41522Egypt Department of Analysis and Evaluation Egyptian Petroleum Research InstituteNasr CityCairoP.B.11727Egypt Institut Européen des Membranes IEMUMR-5635Univ MontpellierENSCMCNRSMontpellierFrance School of Science and Computing Galway-Mayo Institute of TechnologyGalwayIreland Enhanced Composites and Structures Center School of AerospaceTransport and ManufacturingCranfield UniversityBedfordshireUK Botany Section Department of BotanyFaculty of ScienceUniversity of Suez CanalIsmailia41522Egypt

There is an increasing interest in developing nanoparticles with diverse biologic *** this end,we prepared 10 to 15 nm silver nanoparticles(AgNP)from native isolates of Trichoderma *** this study,endophytic fungi hosted four medicinal plants in Saint Katherine Protectorate,South Sinai,Egypt have been isolated by surface sterilization technique on four isolation *** species,based on their frequency of occurrence,out of twenty recovered taxa were tested for their capability to synthesize extracellular *** atroviride hosted Chiliadenus montanus was found to be the best candidate for the production of mycogenic AgNPs among all examined *** mycosynthesized AgNPs were compared with chemically synthesized and characterized using Ultraviolet-visible(UV-vis)spectroscopy,Raman spectroscopy,X-ray diffraction(XRD)and high-resolution transmission electron microscopy(HRTEM)*** HRTEM result showed the distribution of spherical AgNPs ranging from 10 to 15 *** atroviride isolate was subjected to sequencing for confirmation of phenotypic *** internal transcribed spacer(ITS)1-5.8 s-ITS2 rDNA sequences obtained were compared with those deposited in the GenBank Database and registered with accession number MH283876 in the NCBI ***,anticandidal and antifungal effects of chemically and mycosynthesized AgNPs were examined at various concentrations in vitro against six pathogenic bacteria and 4 pathogenic fungi by agar well diffusion *** antibiotics;Gentamicin,Amoxicillin,Clotrimazole,and Nystatin at 5μg/disk were taken as positive controls,while 5%DMSo was used as the negative *** data revealed that the application of mycogenic AgNPs at a concentration of 100 ppm resulted in maximum inhibition of pathogenic bacteria and *** data suggest that AgNPs from native isolates of Trichoderma atroviride(MH283876)offer a source of rapid synthesis of eco-friendly,e

关键词： Antimicrobial endobionts mycogenic AgNPS Saint Katherine Protectorate

Investigation of Particle Breakdown in the Production of Composite Magnesium Chloride and Zeolite Based Thermochemical Energy Storage Materials

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Energy Engineering 2023年第10期120卷 2193-2209页

作者： Louis F.Marie Karina Sałek Tadhg S.o’donovan HeriotWatt University Institute of MechanicalProcess and Energy EngineeringEdinburghUK

Composite thermochemical energy storage(TCES)represents an exciting field of thermal energy storage which could address the issue of seasonal variance in renewable energy ***,there are open questions about their performance and the root cause of some observed *** researchers have observed the breakdown of particles in their production phase,and in their *** study seeks to investigate the underlying cause of this *** and EDX analysis have been conducted on MgCl2 impregnated 13X zeolite composites of differing diameters,as well as LiX *** was done in order to study the level of impregnation of salt into the zeolite matrix,as well as the effect this impregnation process has on the morphology of the *** was conducted using ImageJ software to study the effect of the impregnation process on the diameter of the *** has been found that a by weight impregnation concentration of magnesium chloride of 11.90%for the LiX zeolite,and 7.59%and 5.26%for the large diameter 13X zeolite and the small diameter 13X zeolite respectively has been *** has been found that the impregnation process significantly affects themorphology of 13X zeolite particles,causing large fissures to form,and eventually resulting in the previously found breakdown of these *** has been verified that a primary factor influencing the breakdown of the 13X zeolite particles is the efflorescence and sub-fluorescence phenomena,which leads to a build-up of crystals in the zeolite *** has also been found that prolonged impregnation times and the use of high concentration salt solutions in the soaking process can induce significant crystal growth which also leads to the breakdown of these *** demonstrate that LiX zeolite is the optimum host matrix choice in these *** results will allow for the design of more resilient composite TCES particles.

关键词： Composites thermochemical energy storage salt-in-porous-matrix zeolites seasonal storage

Concussion in contact sport:A challenging area to tackle

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Journal of Sport and Health Science 2017年第3期6卷 299-301页

作者： Samuel Stuart Aodhan Hickey Rosie Morris Karol o'donovan Alan Godfrey Institute of Neuroscience/Newcastle University Institute of Ageing Newcastle UniversityNewcastle upon Tyne NE4 5PLUK Insight Centre for Data Analytics University College DublinDublin D04 V1W8Ireland School of Medicine University College CorkCork T12 EH31Ireland Newcastle University Business School Newcastle UniversityNewcastle upon Tyne NE1 4SEUK

*** problem The term'concussion'refers to a common form of traumatic brain injury,which typically occurs after a blow or injury to the *** has been described as a'complex pathophysiological process affecting the brain,induced by biomechanical factors',and shear forces induced by rotational acceleration are believed to be the primary mechanism of injury in concussion.~1The incidence of concussion in the UK has been shown to be

关键词： Concussion in contact sport:A challenging area to tackle

Seasonal variations in nutritive and botanical composition properties of multispecies grazing swards over an entire dairy grazing season

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Grassland Research 2022年第4期1卷 221-233页

作者： Ciarán Hearn Michael Egan Mary Bridget Lynch Christina Fleming Michael o'donovan Teagasc Animal and Grassland Research and Innovation Centre MooreparkCorkIreland School of Agriculture and Food Science University College DublinDublinIreland Contribution:Formal analysis InvestigationMethodologyVisualizationWriting-original draftWriting-review&editing

Background Recently,there has been increasing interest in the use of multispecies(MS)swards in dairy grazing *** A plot grazing study was established to investigate the potential contribution of different sward species(perennial ryegrass,legumes and herbs)sown in grazing *** sward mixtures were sown,ranging in complexity from a perennial ryegrass(PRG)monoculture to binary mixtures including either forage legumes or herbs to a five-species mixture;four different nitrogen(N)application rates of 0,100,150 and 200 kg N ha−1 were applied to each *** Species abundance for all sward species components was associated with the interaction of time point and sward mixture;species abundance for all sward components,except PRG,was associated with the interaction of N application and sward *** interactions of time point and sward mixture,and time point and N application rate,were associated with all analysed sward chemical components,except for sward *** Increased N application rates reduced the level of clover in all sward *** levels of white clover led to increased sward crude protein levels;the inclusion of ribwort plantain led to some seasonal variation in the nutritive value of swards.

关键词： botanical composition chemical composition dairy production grazing multispecies swards

Vitamin D Levels in CoVID-19 Patients Admitted to Intensive Care

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Health 2023年第8期15卷 845-860页

作者： James o’donovan Julia Cheong Duncan Chambler Intensive Care Unit Dorset County Hospital Dorchester UK

Background: Vitamin D has garnered much attention for its role in immune function, more specifically, it’s conceivable link to the clinical severity of Covid-19 infections and therefore its potential application in prophylactic or therapeutic treatment. Vitamin D appears capable of inhibiting pulmonary inflammatory responses while enhancing innate defence mechanisms against respiratory pathogens with population-based studies showing an association between circulating vitamin D levels and lung function. We understand that infection with Sars-Cov-2 induces production of pro and anti-inflammatory cytokines, whilst Vitamin D downregulates production of pro-inflammatory Th1 cytokines including tumour necrosis factor and interferon Y, whilst increasing expression of anti-inflammatory cytokines by macrophages. Vitamin D is also involved in the renin-angiotensin system which is regulated by entry of the SARS-Cov-2 virus into cells via the ACE2 receptor, leading to cytokine storms, with subsequent fatal respiratory distress syndrome. The theoretical implications for Vitamin D status in the presentation of Covid-19 (the disease state of Sars-Cov-2) exist, yet data on its application is currently limited. Geographical variables depicting patterns between sun exposure, diet or Vit D status, and risk of death from Covid-19 have shown strong negative correlation. Aim: We aim to assess levels of Vitamin D deficiency in ICU patients who have tested positive for Sars-Cov-2 and who have exhibited respiratory symptoms. In this way, we hope to identify the possibility of Vitamin D as a significant contributing factor to disease progression in Covid patients. Sample: Male or Female patients of any age, who were admitted to the Intensive Care Unit exhibiting respiratory symptoms, with a positive Sars-Cov-2 PCR test, between 12/3/21 and 25/2/21. sample total: 79. Results: Testing was very inconsistent with only 67.1% having their Vitamin D levels checked. There was average delay in testin

关键词： Covid-19 Sars-Cov-2 Vitamin D Viral Syndrome Cytokine Storm

Impacts of Sward Renewal Method with Perennial Ryegrass (Lolium perenne) on Dry Matter Yield, Tiller Density and Nitrate Leaching

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American Journal of Plant Sciences 2016年第4期7卷 684-694页

作者： Philip Creighton Emer Kennedy Deirdre Hennessy Michael o’donovan Animal and Grassland Research and Innovation Centre Teagasc Mellows Campus Athenry Co. Galway Ireland Animal and Grassland Research and Innovation Centre Teagasc Moorepark Fermoy Co. Cork Ireland

The objective of this study was to evaluate alternative methods of grassland renewal (reseeding) with perennial ryegrass and quantify their effects on subsequent DM yield, tiller density and nitrate leaching. Two experiments were carried out;the first focused on quantifying the influence of Autumn reseeding (August cultivation), and the second, on Spring reseeding (May cultivation) on sward establishment and grass DM production. The study incorporated six treatments namely: direct drill (DD), disc plus power harrow (DPH), power harrow (PH), conventional-plough, till and sow (PLo), and the chemical application of diquat to suppress the existing sward followed by direct drilling (DIQ), represented a rejuvenation method as opposed to full renewal (Spring trial only). All treatments were compared against a control (old permanent pasture). Reseeded swards produced more seasonal (P otal (P only) DM yield than the control sward. All reseeding methods increased the perennial ryegrass tiller density of the sward compared to the old permanent pasture (P ods evaluated were equally as effective as the conventional method of grassland reseeding with the DIQ rejuvenation method intermediate as measured in terms of DM yield and PRG tiller density. The results of the study show no significant difference in the level of nitrate lost in leachate following reseeding regardless of method used or indeed any difference between reseeded swards and old permanent pasture.

关键词： Grass Planting Pasture and Grazing

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专统电视机将不复存在

科技纵览 2016年第5期 50-55页

作者： Paul o’donovan

自20世纪50年代电视取代收音机成为家庭娱乐的主要用具以来，电视机一直是消费类电子产品世界的统治者。它的外形发生了变化，从置于坚固木纹柜子里的微小圆形舷窗变成了今天超乎想象的超薄屏幕，可以平稳地放在电视柜上或挂在墙上。

关键词：电视机消费类电子产品家庭娱乐收音机屏幕超薄

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猪的回肠炎及其控制

中国畜牧兽医 2002年第4期29卷 46-47页

作者： Jim o donovan 余春明

猪的增生性回肠病(回肠炎)最早在1931年被发现,但直到约60年后,本病的病原体由爱丁堡大学的lawson等人命名为lawsonia intracellularis.随后的10年中由于许多特有技术的发展,使得人们可进一步研究这种细菌感染的流行病学和它的各种临床... 详细信息

猪的增生性回肠病(回肠炎)最早在1931年被发现,但直到约60年后,本病的病原体由爱丁堡大学的lawson等人命名为lawsonia intracellularis.随后的10年中由于许多特有技术的发展,使得人们可进一步研究这种细菌感染的流行病学和它的各种临床表现-即地方性回肠炎(RI)、增生性肠病(PE)、坏死性肠炎(NE)和急性出血增生性肠病(AHPE).所有疾病的控制方案都是以流行病学为基础的.有关病原体和传播方式的许多问题仍待解决.

关键词：猪回肠炎控制预防治疗