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Vanadium mineralization at Los Chihuidos sediment-hosted Cu-V deposit,Neuquén basin,Argentina:An approach to vanadium ore forming processes

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Geoscience Frontiers 2024年第1期15卷 225-246页

作者： ana L.Rainoldi Daniel beaufort marta b.Franchini Adolfo Giusiano Sabine Petit Patricia Patrier m.Josefina Pons Dpto.de Geología Universidad Nacional del Sur(UNS)8000 Bahía BlancaArgentina Consejo Nacional de Investigaciones Científicas y Técnicas Centro Patagónico de Estudios MetalogenéticosArgentina Universitéde Poitiers IC2MPCNRS-UMR 7285HydrasaF-86022 Poitiers CedexFrance Universidad Nacional del Comahue Facultad de IngenieríaDepartamento de Geología y Petróleo8300 NeuquénArgentina Consultant Geologist 8300 NeuquénArgentina Universidad Nacional de Río Negro Instituto de Investigación en Paleobiología y GeologíaRío NegroArgentina

Vanadium mineralization at Los Chihuidos deposit of the Neuquén basin is linked to the development of a redox front system related to the inflow of hydrocarbons into the red sandstone of the Huincul *** of hydrocarbons with oxidized red beds and connate water generated redox reactions where hematite was dissolved due to iron reduction resulting in the discoloration of the red *** the contact between oxidized red sandstone and reduced white sandstone,precipitation of specific mineral phases resulted in the V ore with minor amounts of *** the implementation of the redox interface,abundant V-montmorillonite and V-hematite precipitated at the more oxidizing conditions and Cu-V-corrensite-type at the more reducing conditions of the redox *** the redox front advanced with fluids constantly migrating into the reservoir,more reducing conditions were stablished,promoting chloritization and minor illitization with V-Cu incorporation and continuous upgrading of the *** ore mineralogy consists of clay minerals including V-bearing montmorillonite,Cu-V-corrensite-type,V-di-trioctahedral chlorite and Cu-tri-trioctahedral chlorite with minor V-illite-smectite mixed-layer minerals and associated secondary *** over illitization was favored due to high amounts of Fe and mg in detrital clasts and in connate fluids and by low K availability related to low amounts of detrital *** spatial transition of V and/or Cu bearing clay minerals observed through the mineralized redox front at Los Chihuidos deposit(kaolinite→smectite→illite/smectite→corrensite-type→di-trioctahedral-chlorite→tri-trioctahedral-chlorite)and the related variation of V-Cu concentrations in bulk rock are indicative of increasing pH and decreasing Eh of resident solutions from red to white sandstones during the hypogene mineralization *** influx of Cu-rich oxidized basinal brines precipitated main copper ore with Cu-sulfides in the white sandst

关键词： Clay minerals V-chlorite Redox front bleaching Hydrocarbons

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INTRINSIC FLUORESCENCE CHANGES IN NERVE TERmINALS,EVOKED bY ACTION POTENTIALS,ARE mODULATED bY KREbS CYCLE SUbSTRATES

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Journal of Innovative Optical Health Sciences 2011年第2期4卷 209-214页

作者： PAUL KOSTERIN ana LIA ObAID bRIAN m.SALZbERG Department of Neuroscience University of Pennsylvania School of medicine Philadelphia PA 19104USA Department of Physiology University of Pennsylvania School of medicine Philadelphia PA 19104USA

Electrical stimulation of the mammalian neurohypophysial infundibular stalk evokes the entry of Nat and Ca^(2+) into the neurosecretory terminals during the action *** events,in turn,increase intracellular Ca^(2+) and activate NaK-and Ca-ATPases,prompting the mitochondria to increase oxidative phosphorylation which can be monitored by recording the changes in FAD and *** paper reflects our efforts to determine whether or not modulating the capacity of mitochondria to produce ATP,by changing the concentrations of two important substrates of the Krebs cycle of the nerve terminal mitochondria,pyruvate and glucose,has an effect on the intrinsicfluorescence changes triggered by action potential stimulation.

关键词： Fluorescence FAD NADH action potential metabolism

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Effect of Zn binding to phytate and humic substances on its uptake by wheat(Triticum durum L.)as affected by carbonates and Fe oxides

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Pedosphere 2022年第6期32卷 823-832页

作者： ana m.GARCÍA-LÓPEZ Ramiro RECENA Antonio DELGADO Department of Agronomy ETSIAUniversity of SevilleSeville 41013(Spain)

Although complexation with soil organic matter may improve zinc(Zn)bioavailability to plants,the effect of Zn sorbent surface on the use of complexed Zn by plants remains *** objective of this research was to elucidate how Zn complexation with humic substances(HS)and phytate affects the uptake of Zn by wheat plants depending on the main sorbent surface in growth media,i.e.,carbonates and Fe *** this end,two pot experiments were performed,one using Fe oxide-coated siliceous as the siliceous growth medium sand and the other using a mixture of calcareous sand and siliceous sand as the calcareous growth *** experiment involved three Zn sources,Zn-HS complex,Zn phytate,and ZnSO_(4).All sources were applied with surface irrigation at two Zn rates(0.25 and 2 mg kg^(-1) growth medium).The Zn-HS complex significantly increased Zn uptake by plants in both media,relative to the other two Zn sources,but no significant difference was observed between Zn phytate and ZnSO_(4).In the calcareous medium,Zn-HS complex and Zn phytate resulted in significantly higher dry biomass yields of wheat than ZnSO_(4).In the siliceous medium,spike and shoot dry biomass yields with Zn-HS complex at the low rate and Zn phytate at both rates were not significantly different from those with ZnSO_(4) at the high *** harvest,approximately 50%of the Zn applied as Zn-HS complex remained extractable by diethylenetriaminepentaacetic acid(DTPA),while this proportion was less than 20%for the other Zn ***,Zn-HS complex and Zn phytate are sources of available Zn for plants,and they are more effective than ZnSO_(4) in increasing plant growth,particularly when carbonates are the main Zn sorbent surface.

关键词： calcareous growth medium micronutrient organic matter organic phosphorus Zn availability Zn deficiency Zn sorbent surface Zn source

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Clinical outcomes with a new microincisional diffractive multifocal IOL

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Eye and Vision 2015年第1期2卷 7-15页

作者： Jorge L Alió Alfredo Vega-Estrada ana b Plaza-Puche Vissum Corporation AlicanteSpain Division of Ophthalmology Universidad Miguel HernándezAlicanteSpain Avda de Denia s/n Edificio Vissum03016 AlicanteSpain

background:To evaluate the refractive outcomes and the optical performance as well as the quality of life in patients implanted with a new diffractive multifocal intraocular lens(IOL).methods:Prospective,clinical study including 41 cases of patients who underwent cataract surgery and were divided in two groups:group 1,including 20 eyes implanted with the multifocal IOL SeeLens mF(Hanita Lenses,Israel);group 2,21 eyes implanted with the Acrysof SA60AT *** acuity,defocus curve,intraocular aberrations,contrast sensitivity function and quality of life were assessed during a follow up period of 6 ***:Significant improvement was observed in the uncorrected distance visual acuity(UDVA)and corrected distance visual acuity(CDVA)in both groups(pmultifocal group showed better results in terms of uncorrected near visual acuity(UNVA)and distance-corrected near visual acuity(DCNVA)(pmparison of both groups showed better visual acuities for the multifocal IOL group in defocus levels from-3.0 D to-1.50 D(p≤0.01).At 6 months,there was a significant reduction of the internal higher order aberrations(p≤0.04).A significant increase in scotopic contrast sensitivity was detected for 6 cycles/°spatial frequency during follow up(p=0.04),but no significant changes were observed for the rest of spatial frequencies(p≥0.06).Visual Functioning Index(VF-14)questionnaire showed that patients reported high levels of satisfaction when performing daily ***:The SeeLens mF IOL is able to successfully restore distance,near and intermediate visions after cataract *** also provides functional intermediate vision with optimal intraocular optical quality.

关键词： Visual visual IOL

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Protein glycation:a wolf in sweet sheep’s clothing behind neurodegeneration

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Neural Regeneration Research 2024年第5期19卷 975-976页

作者： ana b.Uceda Francisco Leal-Pérez miquel Adrover Institut Universitari d’Investigacióen Ciències de la Salut(IUNICS) Institut d’InvestigacióSanitària Illes balears(IdISba) Departament de Química Universitat de les Illes BalearsCtraPalma de MallorcaSpain

At the beginning of the 16th century,Paracelsus coined the maxim:“the dose makes the poison”.This principle can be applied to all living organisms,including organs and *** brain and its glial and neuronal cells are ... 详细信息

关键词： organs sheep sweet

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Water balance prediction in stormwater infiltration basins using 2-D modeling:An application to evaluate the clogging process

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International Journal of Sediment Research 2018年第4期33卷 371-384页

作者： Patrice Cannavo anas Coulon Sylvain Charpentier béatrice béchet Laure Vidal-beaudet Agrocampus Ouest Institute for Research on Urban Sciences and Techniques (IRSTV) Research Unit Environmental Physics and Horticulture Research(EPHor) bretagne Loire University French Institute of Science and Technology for Transport Development and Networks (IFSTTAR) IRSTV Geotechnical engineeringEnvironment Natural hazards and Earth sciences Department (GERS) Water and Environment Laboratory (LEE)

Sustainable urban drainage systems are built along roads and in urban areas to collect urban runoff and avoid flooding, and to filter water pollutants. Sediment collected by runoff is deposited in the stormwater basin and progressively reduces water infiltration efficiency, leading to the clogging of the basin. To help stormwater basin managers and stakeholders better understand and predict clogging rates in order to elaborate maintenance plans and schedules, water transport prediction models are necessary. However,because of the heterogeneous sediment hydrodynamic properties inside the stormwater basin, a twodimensional(2-D) water flow model is required to predict water levels and possible overflow as accurately as possible. Saturated hydraulic conductivity(Ks) and sediment water retention curves were measured in the overall sediment layer of the stormwater basin, in addition to sediment layer thickness and organic matter content(11 sampling points). Sediment depth was used to predict organic matter(Om) content, and the Om was used to predict Ks. Water height in the basin was modeled with the HYDRUS-2 D model by taking into account the sediment hydrodynamic properties distribution. The HYDRUS-2 D model gave a satisfactory representation of the measured data. Scenarios of the hydraulic properties of stormwater basin sediment were tested over time, and hydraulic resistance, R, was calculated to assess the stormwater basin performance. Presently, after 20 years of functioning, the stormwater basin still ensures efficient water infiltration, but the first outflow(Hydraulic resistance,R > 24 h)) is expected to appear in the next 5 years, and clogging(R > 47 h) in the next 13 years. This 2-D water balance model makes it possible to integrate the hydrodynamic heterogeneity of a stormwater basin. It gives interesting perspectives to better predict 2-D/3-D contaminant transport.

关键词： 2-D water transport Hydraulic conductivity Sediment water retention Stormwater basin efficiency

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Evolutionary Genomics of Weedy Rice in the USA

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Journal of Integrative Plant biology 2007年第6期49卷 811-816页

作者： Kenneth m. Olsen ana L. Caicedo Yulin Jia Department of biology Washington University St Louis MO 63130 USA Department of biology University of Massachusetts Amherst MA 01003 USA USDA-ARS Dale bumpers National Rice Research Center Stuttgart AR 72160 USA

Red rice Is an Interfertlle, weedy form of cultivated rice （Oryza sativa L.） that competes aggressively with the crop In the southern US, reducing yields and contaminating harvests. No wild Oryza species occur In North America and the weed has been proposed to have evolved through multiple mechanisms, Including ＂de-domestication＂ of US crop cultlvars, accidental introduction of Asian weeds, and hybridization between US crops and Asian wild/weedy Oryza strains. The phenotype of US red rice ranges from ＂crop mimics＂, which share some domestication traits with the crop, to strains closely resembling Asian wild Oryza species. Assessments of genetic diversity have Indicated that many weed strains are closely related to Asian taxa （Including indica and aus rice varieties, which have never been cultivated In the US, and the Asian crop progenitor O. ruflpogon）, whereas others show genetic similarity to the tropical Japonica varieties cultivated In the southern US. Herein, we review what Is known about the evolutionary origins and genetic diversity of US red rice and describe an ongoing research project to further characterize the evolutionary genomlcs of this aggressive weed.

关键词： crop-weed introgression de-domestication Oryza sativa weed evolution weedy rice.

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Onto the sense of smell in macaws, amazons and toucans: can they use volatile cues of fruits to make foraging decisions?

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Integrative Zoology 2023年第4期18卷 762-771页

作者： m.Carmen HERNÁNDEZ ana maría VILLADA Isabel bARJA Unidad Zoología Departamento de BiologíaUniversidad Autónoma de MadridCampus Universitario de CantoblancoMadridSpain Toucan Rescue Ranch HerediaCosta Rica Centro de Investigación en biodiversidad y Cambio Global(CIbC-UAm)Universidad Autónoma de madrid MadridSpain

Over the past decades,empirical evidence has been accumulated indicating that olfactory information plays a fundamental role in bird life ***,many aspects of avian olfaction remain poorly *** purpose was to broaden the knowledge about the importance of the sense of smell in some neglected bird groups:psittaciformes and ramphastids,and to compare how the response varied between the *** of the lack of information about the use of chemical cues for locating food in fruit-eating species,we also aimed to delve into this *** conducted a 3-choice(water/vinegar/papaya and banana juice)scent test in 5 Costa Rican native species:scarlet macaw(Ara macao),red-lored amazon(Amazona autumnalis),yellow-naped amazon(Amazona auropalliata),keel-billed toucan(Ramphastos sulfuratus),and yellow-throated toucan(Ramphastos ambiguus).Results revealed that macaws and toucans allocated signiﬁcantly more time to interacting with the fruit scent container,indicating that these species can perceive the volatile chemicals emitted by ripe fruits and that they can use this information to make foraging ***,amazons did not dedicate more time to interact with the fruit *** research provides theﬁrst evidence of the ability to exploit chemical volatile cues in macaws and toucans.

关键词： avian olfaction bird senses frugivorous birds psittaciformes ramphastids scent test

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The Convex-Set Algebra and Intersection Theory on the Toric Riemann–Zariski Space

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Acta mathematica Sinica,English Series 2022年第3期38卷 465-486页

作者： ana maría bOTERO Institut Für mathematik Universität RegensburgUniversitätsstr.3193053RegensbergGermany

In previous work of the author,a top intersection product of toric b-divisors on a smooth complete toric variety is *** is shown that a nef toric b-divisor corresponds to a convex set and that its top inetersection number equals the volume of this convex *** goal of this article is to extend this result and define an intersection product of sufficiently positive toric b-classes of arbitrary *** this,we extend the polytope algebra of mcmullen to the so called convex-set algebra and we show that it embeds in the toric b-Chow *** this way,the convex-set algebra can be viewed as a ring for an intersection theory for sufficiently positive toric *** an application,we show that some Hodge type inequalities are satisfied for the convex set algebra.

关键词： Convex geometry intersection theory toric varieties b-Chow groups Riemann–Zariski spaces

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mesalamine treatment mimicking relapse in a child with ulcerative colitis

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World Journal of Pediatrics 2014年第4期10卷 371-373页

作者： Iva Hojsak ana m Pavić Sanja Kolaček Referral Center for Pediatric Gastroenterology and Nutrition Children's Hospital ZagrebZagrebCroatia University of Zagreb medical School ZagrebCroatia

background:There are reports on mesalamine-induced bloody diarrhea mimicking ulcerative colitis(UC)relapse,mostly in ***:Herein we present a case of a child with UC who developed relapse of hemorrhagic colitis related to ***:A 10-year-old girl developed severe symptoms mimicking UC relapse 3 weeks after introduction of mesalamine *** mesalamine was withdrawn,her symptoms improved,but deteriorated again during the challenge of mesalamine despite concomitant use of ***:This is the fi rst case report on such a young child during the concomitant use of corticosteroids.

关键词： 5-aminosalicylic acid mesalamine ulcerative colitis

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