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Influence of free fatty acid content and degree of fat saturation on production performance,nutrient digestibility,and intestinal morphology of laying hens

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Animal Nutrition 2023年第2期13卷 313-323页

作者： mar.a palomar Carlos Garces-Narro Olga Piquer Roser Sala Alba Tres Jose AGarcía-Bautista mar.a D.Soler AviFeed Science Department of Animal Production and HealthFacultad de VeterinariaUniversidad CEU Cardenal Herrera e CEU UniversitiesE-46115Alfara de PatriarcaValenciaSpain Animal Nutrition and Welfare Service Department of Animal and Food ScienceFacultat de VeterinariaUniversitat Autonoma de BarcelonaE-08193BellaterraBarcelonaSpain Departament de Nutrici Ciencies de l’Alimentaci i GastronomiaFacultat de Farmacia i Ciencies de l’AlimentaciUniversitat de BarcelonaE-08921Santa Coloma de GramenetBarcelonaSpain

This study was conducted to evaluate the effects of dietary free fatty acid(FFA)content and degree of fat saturation on production performance,lipid and calcium digestibility,and intestinal function of laying *** a 15-week period,a total of 144 laying hens(19 weeks old)were randomly assigned to 8 dietary treatments,which were obtained by gradually replacing crude soybean oil with soybean acid oil(AO),or crude palm oil with palm fatty acid distillate(FAD).Thus,there were 4 soybean and 4 palm diets with 6%added fat varying in their FFA percentage(10%,20%,30%,and 45%),following a 2×4 factorial *** treatment included 6 replicates with 3 birds per *** daily feed intake and final body weight were significantly higher in palm diets(P<0.001),while no differences were found in egg mass and feed conversion *** levels of FFA in soybean diets resulted in lower egg production and higher egg weight(linear,P<0.01).Regarding the degree of fat saturation,hens fed soybean diets presented higher digestibility of ether extract(EE),fatty acids,and calcium than palm diets(P<0.001).The dietary FFA percentage negatively affected the digestibility of EE and calcium(P<0.01),while having little effect on FA *** was a significant interaction in the AME;lower values were reported in soybean diets as the dietary FFA percentage increased(linear,P<0.01),whereas palm diets remained *** experimental diets had little effect on gastrointestinal weight and ***,the jejunum of soybean diets showed higher villus height and higher villus height-to-crypt depth ratio than palm diets(P<0.05),and the dietary FFA percentage increased the crypt depth and decreased the villus height-to-crypt depth ratio(linear,P<0.05).It was concluded that varying dietary FFA content did not affect fat utilization as much as the degree of saturation did,supporting the use of AO and FAD as alternative fat ingredients.

关键词： Acid oil Fat by-product Fatty acid distillate Lipid Calcium

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First imported Plasmodium ovale malaria in Central America: Case report of a Guatemalan soldier and a call to improve its accurate diagnosis

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Journal of Medical Colleges of PLA(China) 2014年第4期29卷 244-247页

作者： mar.a Eugenia Castellanos Sheilee Díaz Emily Parsons Leonard F Peruski Fabiola Enríquez Juan Luis Ramírez Norma Padilla Center for Health Studies-Universidad del Valle de Guatemala (CES-UVG).18 Av.11-95 zona 15Vista Hermosa IIIGuatemalaGuatemala National Reference Laboratory Ministry of Health and Welfare.Km.22Carretera al Pacíi coBarcenasVilla NuevaGuatemalaC.A.GuatemalaGuatemala F.Edward Hebert School of Medicine Uniformed Services University of the Health Sciences.4301 Jones Bridge RoadBethesdaMaryland 20814USA Global Disease Detection Program Centers for Disease Control and Prevention (CDC)Central America Regional Office.1600 Clifton Road NEMS-D68AtlantaGeorgia 30333USA Military Healthcare and Social Services Ministry of DefenseGuatemalaGuatemala.Finca El PalomarAcatanSta.Rosita Zona 16GuatemalaGuatemala Military Medical Center Ministry of DefenseGuatemalaGuatemala.Finca El PalomarAcatanSta.Rosita Zona 16GuatemalaGuatemala

The Mesoamerican Ministers of Health have set 2020 as the target for malaria elimination to be achieved in the region. Imported malaria cases are a potential threat to countries attempting elimination or working to prevent resurgence. We report the first imported Plasmodium ovale infection with molecular confirmation in Central America, which occurred in a Guatemalan soldier that had been deployed in Africa. The obstacles for its diagnosis using the standard microscopy technique and the need to improve its detection are discussed.

关键词： Plasmodium ovale Imported malaria Diagnosis

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Assessing a novel modelling approach with high resolution UAV imagery for monitoring health status in priority riparian forests

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Forest Ecosystems 2021年第4期8卷 810-830页

作者： Juan Guerra-Hernandez Ramon A.Diaz-Varela Juan Gabriel Avarez-Gonzalez Patricia mar.a Rodriguez-Gonzalez edata Centro de iniciativas empresariaisFundacion CEL.O Palomar s/n27004 LugoSpain Forest Research Centre School of AgricultureUniversity of LisbonInstituto Superior de Agronomia(ISA)Tapada da Ajuda1349-017 LisbonPortugal Biodiversity and Applied Botany Unit(GI BIOAPLIC 1809) Department of BotanyEscuela Politecnica SuperiorR/Benigno LedoUniversity of Santiago de CompostelaCampus Universitario27002 LugoSpain Sustainable Forest Management Unit(UXFS) Department of Agroforestry EngineeringEscuela Politecnica SuperiorR/Benigno LedoUniversity of Santiago de CompostelaCampus UniversitarioE-27002 LugoSpain

Background:Black alder(Alnus glutinosa)forests are in severe decline across their area of distribution due to a disease caused by the soil-borne pathogenic Phytophthora alni species complex(class Oomycetes),“alder Phytopththora”.Mapping of the different types of damages caused by the disease is challenging in high density ecosystems in which spectral variability is high due to canopy *** obtained by unmanned aerial vehicles(UAVs)may be particularly useful for such tasks due to the high resolution,flexibility of acquisition and cost efficiency of this type of *** this study,*** decline was assessed by considering four categories of tree health status in the field:asymptomatic,dead and defoliation above and below a 50% threshold.A combination of multispectral Parrot Sequoia and UAV unmanned aerial vehicles-red green blue(RGB)data were analysed using classical random forest(RF)and a simple and robust three-step logistic modelling approaches to identify the most important forest health indicators while adhering to the principle of parsimony.A total of 34 remote sensing variables were considered,including a set of vegetation indices,texture features from the normalized difference vegetation index(NDVI)and a digital surface model(DSM),topographic and digital aerial photogrammetry-derived structural data from the DSM at crown ***:The four categories identified by the RF yielded an overall accuracy of 67%,while aggregation of the legend to three classes(asymptomatic,defoliated,dead)and to two classes(alive,dead)improved the overall accuracy to 72% and 91% *** the other hand,the confusion matrix,computed from the three logistic models by using the leave-out cross-validation method yielded overall accuracies of 75%,80% and 94% for four-,three-and two-level classifications,***:The study findings provide forest managers with an alternative robust classification method for the rapid,effective assessment of area

关键词： Alder RPAS Multi-spectral Defoliation Texture variables 3D point cloud Tree health monitoring

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