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Phase equilibrium modelling of the amphibolite facies metamorphism in the Yelapa-Chimo Metamorphic Complex, Mexico

Geoscience Frontiers 2021年第1期12卷 293-312页

作者： Fabian Gutierrez-Aguilar Peter Schaaf Gabriela Solís-Pichardo Gerardo F.Arrieta-García Teodoro Hernandez-Trevino carlos linares-lopez Posgrado en Ciencias de la Tierra Instituto de GeofísicaUniversidad Nacional Autonoma de MexicoAv.Universidad 3000Ciudad de Mexico04510Mexico Laboratorio Universitario de Geoquímica Isotopica(LUGIS) Instituto de GeofísicaUniversidad Nacional Autonoma de MexicoAv.Universidad 3000Ciudad de Mexico04510Mexico Laboratorio Universitario de Geoquímica Isotopica(LUGIS) Instituto de GeologíaUniversidad Nacional Autonoma de MexicoAv.Universidad 3000Ciudad de Mexico04510Mexico Instituto de Geofísica Universidad Nacional Autonoma de MexicoAv.Universidad 3000Ciudad de Mexico04510Mexico

The Yelapa-Chimo Metamorphic Complex forms part of the Jalisco Block in western Mexico and exposes a wide range of Early Cretaceous metamorphic rocks;such as paragneiss,orthogneiss,amphibolites,and ***,the pressure-temperature(P-T)conditions of metamorphism and partial melting remain poorly studied in the *** elucidate metamorphic P-T conditions,phase equilibrium modelling was applied to two sillimanite-garnet paragneisses,one amphibole-orthogneiss,and one ***-garnet paragneisses exhibit a lepidoblastic texture with a biotite+sillimanite+kyanite+garnet+quartz+plagioclase+K-feldspar mineral ***-orthogneiss and amphibolite display a nematoblastic texture with an amphibole+(1)plagioclase+quartz+(1)titanite assemblage and an amphibole+(2)plagioclase+(2)titanite+ilmenite retrograde mineral *** calculated for the two sillimanite-garnet paragneiss samples show P-T peak conditions at~6-7.5 kbar and~725-740℃.The results for amphibole-orthogneiss and the amphibolite yield P-T peak conditions at~8.5-10 kbar and~690-710℃.The mode models imply that metasedimentary and metaigneous units can produce up to~20 vol%and~10 vol%of melt,*** within a closed system during isobaric heating suggests that melt compositions of metasedimentary and metaigneous units are likely to have direct implications for the petrogenesis of the Puerto Vallarta *** new data indicate that the Yelapa-Chimo Metamorphic Complex evolved through a metamorphic gradient between~23-33℃km^-1and the metamorphic rocks formed at depths between~22 km and~30 km with a burial rate of~2.0 km Ma^-***,the P-T data for both metasedimentary and metaigneous rocks provide new constraints on an accretionary framework,which is responsible for generating metamorphism and partial melting in the YelapaChimo Metamorphic Complex during the Early Cretaceous.

关键词： Phase equilibrium modelling Yelapa-Chimo Metamorphic Complex Amphibolite facies Partial melting

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Advancing healthcare through laboratory on a chip technology:Transforming microorganism identification and diagnostics

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World Journal of Clinical Cases 2025年第3期13卷 9-19页

作者： carlos M Ardila Department of Basic Sciences Biomedical Stomatology Research GroupUniversidad de Antioquia U de AMedellín 0057Colombia

In a recent case report in the World Journal of Clinical Cases,emphasized the crucial role of rapidly and accurately identifying pathogens to optimize patient treatment ***-on-a-chip(LOC)technology has emerged as a transformative tool in health care,offering rapid,sensitive,and specific identification of *** editorial provides a comprehensive overview of LOC technology,highlighting its principles,advantages,applications,challenges,and future *** studies from the field have demonstrated the practical benefits of LOC devices in clinical diagnostics,epidemiology,and food *** studies have underscored the superiority of LOC technology over traditional methods,showcasing improvements in speed,accuracy,and *** future integration of LOC with biosensors,artificial intelligence,and data analytics promises further innovation and *** call to action emphasizes the importance of continued research,investment,and adoption to realize the full potential of LOC technology in improving healthcare outcomes worldwide.

关键词： Laboratory-on-a-chip Microorganism identification Diagnostics Point-ofcare testing Biosensors

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Linking morphological and ecophysiological leaf traits to canopy dieback in Persian oak trees from central Zagros

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Journal of Forestry Research 2019年第5期30卷 1755-1764页

作者： Ahmad Hosseini Seyed Mohsen Hosseini Juan carlos linares Department of Natural Resources AREEOIlam Agricultural and Natural Research and Education CenterIlam 69317-73835Iran Faculty of Natural Resources&Marine Sciences Tarbiat Modares UniversityNoorMazandaran 46417-76489Iran Department of Physical Chemical and Natural SystemsUniversity Pablo de OlavideCarretera de Utrera Km 141013 SevilleSpain

Intraspecific variability in morphological and ecophysiological leaf traits might be theorized to be present in declining populations,since they seem to be exposed to stress and plasticity could be *** we focused on declining Persian oaks(Quercus brantii ***(Jaub and Spach)Zohary)in the Zagros Mountains of western Iran,representing the most important tree species of this *** selected trees with contrasting crown dieback,from healthy to severely defoliated,to investigate the relationships between canopy dieback and leaf morphology,water content and *** also measured esterase and peroxidase,as enzymatic antioxidants and indicators of contrasting *** showing moderate to severe defoliation showed higher leaf mass area(LMA),reduced relative water content(RWC),and lower stomatal density(SD).Increasing LMA indicates a more sclerophyllic structure,according to drier *** did not find significant differences in leaf pigments(chlorophyll a and b,and carotenoids)among crown dieback classes,suggesting that Persian oak trees are able to maintain accurate photochemical efficiency,while reduced RWC and SD suggest hydraulic *** results do not provide a consistent pattern as regards enzymatic antioxidant defense in Persian *** leaf traits would be important drivers of future adaptive evolution in Persian oak,leading to smaller and thicker leaves,which have fitness benefits in dry ***,drought responses may be critically affecting carbon uptake,as photosynthetic compounds are less effectively used in leaves with higher sclerophylly.

关键词： Crown dieback Drought Leaf mass area Oak decline Quercus brantii Stomatal density Sclerophylly

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3D non-stationary wideband circular tunnel channel models for high-speed train wireless communication systems

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Science China(Information Sciences) 2017年第8期60卷 189-201页

作者： Yu LIU Cheng-Xiang WANG carlos lopez Xiaohu GE Shandong Provincial Key Lab of Wireless Communication Technologies Shandong University Institute of Sensors Signals and Systems School of Engineering & Physical Sciences Heriot-Watt University Department of Electronics and Information Engineering Huazhong University of Science and Technology

This paper proposes three-dimensional(3D) non-stationary wideband circular geometry-based stochastic models(GBSMs) for high-speed train(HST) tunnel scenarios. Considering single-bounced(SB)and multiple-bounced(MB) components from the tunnel’s internal surfaces, a theoretical channel model is first established. Then, the corresponding simulation model is developed using the method of equal volume(MEV)to calculate discrete angular parameters. Based on the proposed 3D GBSMs, important time-variant statistical properties are investigated, such as the temporal autocorrelation function(ACF), spatial cross-correlation function(CCF), and space-Doppler(SD) power spectrum density(PSD). Results indicate that all statistical properties of the simulation model, verified by simulation results, can match well those of the theoretical *** statistical properties of the proposed 3D GBSMs are further validated by relevant measurement data,demonstrating the flexibility and utility of our proposed tunnel GBSMs.

关键词： non-stationary statistical properties tunnel channel model GBSM channel measurement

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Photovoltaic-based DC microgrid with partial shading and fault tolerance

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Journal of Modern Power Systems and Clean Energy 2019年第2期7卷 340-349页

作者： carlos CORREA-BETANZO Hugo CALLEJA carlos AGUILAR Adolfo R.lopez-NUNEZ Elías RODRIGUEZ Electronics Department National Center for Research and Development of Technology62490 CuernavacaMorelosMexico Electronics Department Technological Institute of Celaya38010 CelayaGuanajuatoMexico

Partial shading is a common problem that affects bus regulation in DC microgrids with several photovoltaic(PV) modules as energy sources, as a result of reduced solar irradiance reaching the *** problem can be mitigated by incorporating batteries, but if they are not included, appropriate control strategies must be used. This paper presents a new approach in a PV-based DC microgrid, which provides a high-quality bus voltage regulation in islanding mode, without being affected by partial shading or problems associated with PV module connection and disconnection. The solution proposed herein ensures a proper voltage regulation without being affected by problems such as failures in PV modules or mismatch between them. Besides, it can help to prevent PV partial shade stress by disconnecting the affected modules. A further advantage of the approach is the flexibility to connect more PV modules. The advantages of this approach were verified in a 200 W prototype.

关键词： Photovoltaic Microgrid Partial shading Fault Control strategy

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An unsupervised pattern recognition methodology based on factor analysis and a genetic-DBSCAN algorithm to infer operational conditions from strain measurements in structural applications

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Chinese Journal of Aeronautics 2021年第2期34卷 165-181页

作者： Juan carlos PERAFAN-lopez Julian SIERRA-PEREZ Grupo de Investigacion en Ingenieria Aeroespacial Universidad Pontificia BolivarianaCircular 170-01Medellin 050031Colombia

Structural Health Monitoring(SHM) suggests the use of machine learning algorithms with the aim of understanding specific behaviors in a structural system. This work introduces a pattern recognition methodology for operational condition clustering in a structure sample using the well known Density Based Spatial Clustering of Applications with Noise(DBSCAN) *** methodology was validated using a data set from an experiment with 32 Fiber Bragg Gratings bonded to an aluminum beam placed in cantilever and submitted to cyclic bending loads under 13 different operational conditions(pitch angles). Further, the computational cost and precision of the machine learning pipeline called FA + GA-DBSCAN(which employs a combination of machine learning techniques including factor analysis for dimensionality reduction and a genetic algorithm for the automatic selection of initial parameters of DBSCAN) was measured. The obtained results have shown a good performance, detecting 12 of 13 operational conditions, with an overall precision over 90%.

关键词： Clustering DBSCAN Factor analysis FBGs Pattern recognition Strain field

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Warm Forged Medium Carbon V Steel

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Journal of Iron and Steel Research International 2011年第S1期18卷 822-826页

作者： carlos Garcia-Mateo Beatriz lopez Jose Maria Rodriguez-Ibabe MATERALIA Research Group.Department of Physical Metallurgy Centro Nacional de Investigaciones Metalúrgicas (CENIM-CSIC)Avda.Gregorio del Amo 8.E-28040MadridSpain CEIT and TECNUM (University of Navarra) Po Manuel de Lardizabal 15San SebastianE-20018Basque ContrySpain

Nowadays there is a continuous demand,particularly from the automotive industry,for cheaper,lighter and more reliable *** is not surprising then that steel research has been focused during the last decades in new qualities and *** paper is dealing with the use of vanadium microalloyed steels on one of those new processes,warm *** its low precipitation temperature and its recognised ability to strengthen steel microstructures via austenite grain growth control,precipitation hardening and interference of the static recrystallization process,vanadium in microalloyed steels seem to be an appropriate candidate for warm forging.

关键词： warm forging vanadium microalloyed steels

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The movement of ＂false antennae＂ in butterflies with ＂false head＂ wing patterns

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Current Zoology 2015年第4期61卷 758-764页

作者： Tania G. lopez-PALAFOX Armando LUIS-MARTINEZ carlos CORDERO Posgrado en Ciencias Biologicas Instituto de Ecologia Universidad Nacional Autonoma de Mexico Distrito Federal 04510 Mexico Museo de Zoologia Departamento de Biologia Evolutiva Facultad de Ciencias Universidad Nacional Autonoma de Mexico Distrito Federal 04510 Mexico Departamento de Ecologia Evolutiva Instituto de Ecologia Universidad Nacional Autonoma de M6xico Distrito Federal 04510 Mexico

In many butterfly species of the family Lycaenidae, the morphology and color pattern of the hind wings, together with certain behaviors, suggests the presence of a false head （FH） at the posterior end of the perching individual. This FH is consi- dered an adaptation to escape from visually oriented predators. A frequent component of the FH are the tails that presumably resemble the antennae, and the typical hind wings back-and-forth movement along the sagittal plane （HWM） performed while perching apparently move the tails in a way that mimics antennal movement. By exposing 33 individuals from 18 species of Lycaenidae to a stuffed insectivorous bird, we tested two alternative hypotheses regarding HWM. The first hypothesis proposes that, when the butterfly is observed at close range, the HWM distorts the shape of the false head thus reducing its deceiving effect and, therefore, selection will favor butterflies that stop moving their wings when a predator is close by; the second hypothesis says that an increase in the frequency of HWM improves its deflective effect when the butterfly confronts a predator at close range. Our results tend to support the second hypothesis because half of the butterflies started to move their hind wings or increased the rate of HWM when exposed to the stuffed bird; however a substantial proportion of butterflies （30%） stopped moving their hind wings or decreased the rate of HWM as expected from the first hypothesis. Our observations also showed that there is great variation in the rates of HWM, and demonstrated the existence of alternative ways of producing ＂vivid＂ movement of the hind wing tails （the ＂false antennae＂） in the absence of HWM [Current Zoology 61 （4）： 758-764, 2015].

关键词： Butterflies Lycaenidae Predator deception Anti-predator behavior Wing morphology

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Highly accessible aqueous synthesis of well-dispersed dendrimer type platinum nanoparticles and their catalytic applications

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Nano Research 2019年第5期12卷 1083-1092页

作者： Adrian Fernandez-Lodeiro Jamila Djafari David lopez-Tejedor carlos Perez-Rizquez Benito Rodriguez-Gonzalez Jose Luis Capelo Jose M.Palomo carlos Lodeiro Javier Fernandez-Lodeiro BIOSCOPE Group LAQV@REQUIMTEChemistry DepartmentFaculty of Science and TechnologyUniversity NOVA of LisbonCaparica CampusCaparica 2829-516Portugal PROTEOMASS Scientific Society Rua dos InventoresMadan ParqueCaparica CampusCaparica 2829-516Portugal Department of Biocatalysis Institute of Catalysis(CSIC)MadridSpainMarie Curie 2CantoblancoUAM CampusMadrid 28049Spain Scientific and Technological Research Assistance Center(CACTI) University of VigoLagoas-MarcosendeVigo 36310Spain

The application of novel methodologies to the synthesis of nanomaterials is still a challenge in many different technological and scientific *** efficient and reproducible synthetic methodologies,that produce fewer residues and reduce the cost of raw materials must be *** the present work,we have explored the attractive possibility to apply the cheap iron (Ⅱ) sulphate salt in the reduction process of the K2PtCl4 to produce colloids *** synthesis took places in water and was assisted by sodium citrate (SC) using polyvinylpyrrolidone (PVP) as a *** adjustment of this novelty process allows obtaining well-dispersed and sub-20 nm dendrimer-type platinum nanoparticles (Pt D-NPs).The nano-dendrimers produced have been characterized using dynamic light scattering (DLS),transmission electron microscopy (TEM),high-resolution TEM (HR-TEM),XRD spectroscopy,inductive couple plasma (ICP) analysis,Fourier transform infrared (FT-IR) and ultraviolet-visible (UV-vis) *** conformational results derived from the size and shape will be *** application of the Pt D-NPs has been explored in the reduction of p-nitrophenol (p-NP) to p-aminophenol (p-AP) in aqueous media at room temperature obtained TOF value of 253 min^-***,our Pt D-NPs were tested as artificial metalloenzyme showing catechol oxidase activity for oxidation of L-DOPA.

关键词： platinum dendrimer NPs catalytic application green synthesis cateohol oxidase-like activity

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Regulation of the New Arabidopsis Imprinted Gene AtBMIIC Requires the Interplay of Different Epigenetic Mechanisms

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Molecular Plant 2012年第1期5卷 260-269页

作者： Fabian Bratzel ChaoYang Alexandra Angelova Gema lopez-Torrejon Marcus Koch Juan carlos del Pozo Myriam Calonje Centre for Organismal Studies Heidelberg Department of Biodiversity and Plant Systernatics University of Heidelberg Im Neuenheirner Feld 345 69120 Heidelberg Germany Centro de Biotecnologia y Genomica de Plantas （UPM-INIA） Campus de Montegancedo s/n Boadilla del Monte 28660 Madrid Spain

Recently, it has been shown that plants contain homologs to the animal Polycomb repressive complex I （PRC1） components BM11 and RINGIA/B. In Arabidopsis, there are three BMIl-like genes, two of which, AtBMIIA and B, are required during post-embryonic plant growth to repress embryonic traits and allow cell differentiation. However, little is known about the third BMIl-like gene, AtBMIIC. In this work, we show that AtBMIIC is only expressed during endosperm and stamen development. AtBMIIC is an imprinted gene expressed from the maternal allele in the endosperm but bialleli- cally expressed in stamen. We found that the characteristic expression pattern of AtBMIIC is the result of a complex epigenetic regulation that involves CG DNA methylation, RNA-directed non-CG DNA methylation （RdDM）, and PcG activity. Our results show the orchestrated interplay of different epigenetic mechanisms in regulating gene expression throughout development, shedding light on the current hypotheses for the origin and mechanism of imprinting in plant endosperm.

关键词： Epigenetics gene silencing development Polycomb Group proteins.

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