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Effects of Solar UV Radiation on Materials Used in Agricultural Industry in Salta, Argentina: Study and Characterization

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Journal of Materials Science and Chemical Engineering 2014年第4期2卷 1-14页

作者： Carlos Cadena delicia acosta National Institute of Chemical Engineering INIQUI-CONICET Universidad Nacional de Salta Salta Argentina National Institute of Non-Conventional Energies INENCO-CONICET Universidad Nacional de Salta Salta Argentina

The current study presents the characterization of three types of materials after exposure to solar UV radiation. The selection of the materials is related to socio-economic aspects and rural activities in the northwest of Argentina (a.k.a. NOA). The objective was to establish a time parameter that allows estimating the durability of the materials according to their use. One of the materials is used as a protective cover (polyethylene film) of greenhouses, which are used for crop cultivation in the area. Another material is used in photovoltaic modules (PVMs), which are used to supply energy in isolated areas and the third material is sunscreen used by people that are exposed to UV radiation during rural activities. Degradation or deterioration of the materials was monitored using different spectroscopic assays: infrared was used to detect any structural changes in the material, X-rays were used for possible changes in the crystalline structure of the material, and spectral transmittance as this property is likely to be affected by changes in the structure of the material. The results showed that degradation of polyethylene seems to be related to the diminution in transparency and the loss of mechanical resistance with increasing exposure time. The decrease in transparency of one of the layers of a PVM caused a considerable decrease in the energy generated, whereas the sunscreens with a low sun protection factor (SPF) rapidly lost their protective properties and changed their photostability properties. Our results revealed a relationship between relative transmittance loss and exposure timse, which allows estimating the stability of different materials.

关键词： Polyethylene Films Photovoltaic Modules Sunscreen Characterization Degradation Effects Stability

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Borane-Tetrahydrofurane Complex Reduction of Nickel and First Transition Metals in Tetrahydrofurane Media: Controllable Chemistry Leading to Nanoscale Metal and Metal Boride Particles

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Modern Research in Catalysis 2016年第1期5卷 19-30页

作者： delicia acosta Elio E. Gonzo Hugo A. Destéfanis Instituto de Investigaciones para la Industria Química—INIQUI-CONICET ANPCyT Consejo de Investigaciones— CIUNSa Facultad de Ingeniería—UNSa Buenos Aires Argentina

Nickel borides doped with transition metal (Cr, Mn, Fe, Co, Cu, and Zn) MNiB, 4% w/w respect to Ni were prepared by chemical reduction of nickel and metallic salts in methanol solution with borane-tetrahydrofurane (BH3-THF) complex obtained in aprotic solvent (THF anhydrous). Different techniques were used to characterize these materials. The MNiB amorphous structure was verified by XRD. Thermal treatment in N2 shows Ni°, Ni2 Band NiO phases. Spongy-morphology was evident by SEM studies in all cases. XPS and TEM show that doped and non-doped nickel boride was present as Ni° in metallic state as principal phase and nickel alloying with boron was observed in minor quantities. The oxidation stability, magnetic susceptibility and catalytic effect are correlated with parameters of each dopant metal.

关键词： NiB Doped NiB Borane-Tetrahydrofurane Reduction Catalyst

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Origin and diversification of maize: Two teosintes but different contributions

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Molecular Plant 2024年第2期17卷 233-235页

作者： Jonathan acosta-Bayona Gloria Leon-Martinez Jean-Philippe Vielle-Calzada Grupo de Desarrollo Reproductivo y Apomixis UGA Laboratorio Nacional de Genomica para la BiodiversidadCinvestav IrapuatoIrapuato Gto CP36825Mexico

The unique topographic,climatic,and latitudinal heterogeneity of Mesoamerica is crucial to understanding the evolutionary emergence of one of the richest cultural and biological regions in the planet and its impact on food *** divided between two regions of large biodiversity-lowland tropical or coastal zones and temperate or subtropical highlands sculpted by parallel sierras and their central plateau-the Mexican territory harbors more than 2000 endemic monocotyledonous species,including several hundred grasses(Poaceae),particularly those belonging to the genus Zea,composed of maize(Zea mays ***)and its wild relatives,collectively referred as teosintes.

关键词： collective planet harbor

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Review of the Cretaceous avian diversity of Antarctica:a changing scenario for the evolution of early Neornithine birds

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Advances in Polar Science 2024年第1期35卷 1-13页

作者： Carolina acosta HOSPITALECHE Facundo IRAZOQUI Paula BONA Ariana PAULINA-CARABAJAL División Paleontología de Vertebrados Museo de La PlataFacultad de Ciencias Naturales y MuseoUniversidad Nacional de La PlataPaseo del Bosque s/nLa Plata B1900FWAArgentina Consejo Nacional de Investigaciones Científicas y Técnicas(CONICET) Buenos Aires C1425FQBArgentina División Paleontología Vertebrados Museo de La Plata-Anexo ⅡFacultad de Ciencias Naturales y MuseoUniversidad Nacional de La PlataCalles 122 y 60La Plata B1900FWAArgentina Instituto de Investigaciones en Biodiversidad y Medioambiente(INIBIOMA) Consejo Nacional de Investigaciones Científicas y Técnicas-Universidad Nacional del ComahueSan Carlos de Bariloche R8400GAMArgentina

The worldwide record of Cretaceous Neornithes and Neornithine-like birds is both controversial and poorly ***,in recent years,the Antarctic continent has yielded a substantial number of Maastrichtian avian specimens,contributing significantly to our understanding of the early evolution of this ***,the keen interest and collaborative efforts of various paleornithologists have resulted in a wealth of knowledge,which we have thoroughly reviewed,updated,and discussed in the context of recent discoveries.

关键词： Maastrichtian Antarctic Peninsula Vega Island Seymour(Marambio)Island Neornithes birds

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The ILux^(®) compared to the mechanical meibomian gland expression for the treatment of moderate and severe meibomian gland dysfunction

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International Journal of Ophthalmology(English edition) 2024年第6期17卷 1042-1048页

作者： María Ximena Núñez Andrea acosta-Ortega Guillermo Raul Vera-Duarte Catalina Gómez-Duarte Unit of Cornea Cataract and Refractive SurgeryVision Sana Research GroupClínica de Oftalmología de CaliFaculty of Medicine Pontificia Universidad Javeriana CaliCali 760031Colombia Department of Ophthalmology Faculty of Medicine Pontificia Universidad Javeriana CaliCali 760031Colombia Department of Ophthalmology Hospital de ClínicasNational University of AsunciónAsunción 111421Paraguay

AIM:To compare the safety and effectiveness of eyelid treatment with the ILux®-MGD Treatment System in one session versus five sessions of mechanical meibomian gland expression(MMGE)in patients with moderate to severe meibomian gland dysfunction(MGD).METHODS:A prospective,randomized,open-label,and controlled clinical trial that compared one session of the ILux®MGD Treatment System versus five sessions of MMGE in both eyes of 130 patients aged≥18y with Ocular Surface Disease Index(OSDI)scores≥13,total meibomian gland scores(MGS)of<15 in the lower eyelid of each eye,and non-invasive tear break-up time(NI-TBUT)<10s,who were randomized 1:1 to ILux®or ***:The mean age was 58±*** total MGS scores in both treatment groups were *** follow-up,there were significant differences in total MGS and per sector with P<*** analysis was performed using generalized estimating equations corresponding to the generalized linear model for repeated means to determine the treatment relationship with total MGS,NIBUT,and *** was a significant difference between ILux®and MMGE(P<0.001)at follow-up from the first to the twelfth month in MGS,NI-BUT,and OSDI *** adverse events were ***:ILux®treatment compared to MMGE significantly improves symptoms and signs in patients with moderate to severe MGD for one year without adverse events.

关键词： meibomian gland dysfunction ILux® ocular surface dry eye

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Association between lifestyle factors and thyroid function in young euthyroid adults

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Food Science and Human Wellness 2024年第1期13卷 265-275页

作者： Elisa Merchan-Ramirez Guillermo Sanchez-Delgado Lucas Jurado-Fasoli Francisco M acosta Manuel Munoz-Torres Jose M.Llamas-Elvira Jonatan R Ruiz Sport and Health University Research Institute(iMUDS) Faculty of Sports ScienceUniversity of GranadaGranada 18016Spain Pennington Biomedical Research Center Baton Rouge 70808USA Faculty of Medicine University of GranadaGranada 18071Spain Turku PET Centre University of TurkuTurku 20500Finland Turku PET Centre Turku University HospitalTurku 20520Finland Biosanitary Research Institute of Granada(Ibs.Granada) Granada 18012Spain CIBERFES Instituto de Salud CarlosⅢMadrid 28029Spain Endocrinology and Nutrition Service University Hospital San CecilioGranada 18016Spain Nuclear Medicine Service "Virgen de las Nieves"University HospitalGranada 18014Spain

Purpose:The present work examines the associations of dietary habits,sedentarism,physical activity(PA)levels and sleep habits,with thyroid function in young euthyroid ***:A total of 105 young euthyroid adults participated in this cross-sectional *** function was determined in fasting conditions(>6 h).Dietary habits were measured by a food frequency questionnaire and three non-consecutive 24 h recalls,and different dietary intake and patterns were then *** time spent in sedentary,PA levels and sleep habits were objectively measured using a wrist-worn ***:Energy and carbohydrate intake were positively associated with thyroid stimulating hormone(TSH)(β=0.222;R^(2)=0.102;P=0.022 andβ=0.425;R^(2)=0.129;P=0.007,respectively)whereas fat intake was negatively associated with TSH(β=-0.428;R^(2)=0.137;P=0.004).Energy intake was also positively associated with free triiodothyronine(β=0.277;R^(2)=0.137;P=0.004).Further,adherence to the Mediterranean diet was negatively related to TSH and free thyroxine(FT4)(β=-0.221;R^(2)=0.113;P=0.020 andβ=-0.268;R^(2)=0.071;P=0.007,respectively).Vigorous-intensity and overall PA were negatively associated with FT4(β=-0.227;R^(2)=0.052;P=0.022 andβ=-0.204;R^(2)=0.042;P=0.041,respectively).In contrast,no associations were found between sleep parameters and thyroid ***:Lifestyle factors such as dietary intake and PA levels seems to be related to thyroid function even in young euthyroid adults.

关键词： Thyroid hormones Dietary intake Sleep Physical activity Euthyroid

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Fungi Associated with Sand and Plants from Marine Coastlines: Potential Relevance for Human Health

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Advances in Microbiology 2024年第6期14卷 303-316页

作者： Marina Carrasco-acosta Pilar Garcia-Jimenez Department of Biology Universidad de Las Palmas de Gran Canaria Campus de Tafira Las Palmas Spain

The fungal community associated with beach sand and plants located along marine coasts are an under-studied area of research despite its potential relevance to human health. In this study, we isolated and identified the cultivable mycobiota associated with sand and plants collected along the coast of Gran Canaria (Spain) using culture-dependent and -independent methods. Clinically relevant species belonging to Cryptococcus spp. and related genera such as Naganishia and Papilotrema were isolated and identified from shoreline plants. Moreover, Candida tropicalis was isolated from beach sand, and Aspergillus fumigatus and Aspergillus terreus strains were associated with both types of samples (i.e., plants and beach sand). We conclude that beach sand and shoreline plants are potential reservoirs of fungi of high clinical interest. We recommend including beach sand and plants from the environment when assessing the quality of marine coastal systems. Our results open a framework for studying the natural marine environment and its role in the epidemiology of infectious diseases in order to more accurately manage public health.

关键词： Sand Beach Shoreline Plants Reservoir of Pathogenic Fungi Cryptococcus spp. Aspergillus spp.

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Hordedane diterpenoid phytoalexins restrict Fusarium graminearum infection but enhance Bipolaris sorokiniana colonization of barley roots

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Molecular Plant 2024年第8期17卷 1307-1327页

作者： Yaming Liu Dario Esposto Lisa K.Mahdi Andrea Porzel Pauline Stark Hidayat Hussain Anja Scherr-Henning Simon Isfort Ulschan.Bathe Ivan F.acosta Alga Zuccaro Gerd U.Balcke Alain Tissier Department of Cell and Metabolic Biology Leibniz Institute of Plant BiochemistryHalleGermany Institute for Plant Sciences Cluster of Excellence on Plant Sciences(CEPLAS)Cologne BiocenterUniversity of CologneCologneGermany Department of Bioorganic Chemistry Leibniz Institute of Plant BiochemistryHalleGermany Max Planck Institute for Plant Breeding Research CologneGermany Horticultural Sciences University of FloridaGainesvilleFLUSA.

Plant immunity is a multilayered process that includes recognition of patterns or effectors from pathogens to elicit defense *** include the induction of a cocktail of defense metabolites that typically restrict pathogen ***,we investigate the interaction between barley roots and the fungal pathogens Bipolaris sorokiniana(Bs)and Fusarium graminearum(Fg)at the metabolite *** identify hordedanes,a previously undescribed set of labdane-related diterpenoids with antimicrobial properties,as critical players in these *** of barley roots by Bs and Fg elicits hordedane synthesis from a 60o-kb gene *** reconstruction of the biosynthesis pathway in yeast and Nicotiana benthamiana produced several hordedanes,including one of the most functionally decorated products 19-β-hydroxy-hordetrienoic acid(19-OH-HTA).Barley mutants in the diterpene synthase genes of this cluster are unable to produce hordedanes but,unexpectedly,show reduced Bs *** contrast,colonization by Fusarium graminearum,another fungal pathogen of barley and wheat,is 4-fold higher in the mutants completely lacking ***,19-OH-HTA enhances both germination and growth of Bs,whereas it inhibits other pathogenic fungi,including *** of microscopy and transcriptomics data suggest that hordedanes delay the necrotrophic phase of *** together,these results show that adapted pathogens such as Bs can subvert plant metabolic defenses to facilitate root colonization.

关键词： barley Hordeum vulgare diterpenoid phytoalexins gene cluster pathogenic fungi Bipolaris sorokininiana Fusarium graminearum

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Foreword

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Advances in Polar Science 2024年第1期34卷 2-2页

作者： Javier N.Gelfo Carolina acosta Hospitaleche

Motivated by the spirit ignited during the I Provincial Scientific Congress on Antarctica in the city of Ushuaia,in Tierra del Fuego,Antártida e Islas del Atlántico Sur Province,Argentina,convened in October 2022,we proudly introduce this special volume entitled“Past and present climatic change in Antarctica:geological proxies and biological processes”.

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Acknowledgements

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Advances in Polar Science 2024年第1期35卷 142-142页

作者： Carolina acosta Hospitaleche Javier N.Gelfo Carolina acosta Hospitaleche and Javier N.Gelfo

Acknowledgement to reviewers for Vol.35 No.1 issue The editors of this special volume,along with the Editorial Board and Editorial Office of Advance in Polar Science,wish to express deep gratitude for the time invested and the meticulous revisions carried out by Enrique Bostelmann(Chile),Michael Burns(USA),Rodolfo Coria(Argentina),Jun Ebersole(USA),Jürgen Kriwet(Austria),Guillermo M.López(Argentina),James Parham(USA),Juan Saad(Argentina),Leonardo Salgado(Argentina),Sergio Soto Acuña(Chile),Washington Jones(Uruguay)and seven anonymous reviewers from Argentina,China,Germany,Poland,and USA.

关键词： knowledge invested Saa

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