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Solar-assisted photocatalytic water splitting using defective UiO-66 solids from modulated synthesis

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nano Research 2024年第5期17卷 4134-4150页

作者： Celia M.Rueda-navarro María Cabrero-Antonino Paula Escamilla valentín díez-Cabanes dong Fan Pedro Atienzar Belén Ferrer Ignacio Vayá Guillaume Maurin Herme G.Baldoví Sergio navalón departamento de Química Universitat Politècnica de ValènciaCamino de Vera s/nValencia 46022Spain Instituto de Ciencia Molecular(ICMOL) Universitat de ValènciaPaterna 46980Spain ICGM Univ.MontpellierCNRSENSCMMontpellier34095France Instituto de Tecnología Química(UPV-CSIC) Universitat Politècnica de ValènciaAvenida de los Naranjos s/nValencia 46022Spain

Metal-organic frameworks(MOFs)are attracting increasing interests as photocatalysts for solar-driven hydrogen production from *** paper reports on a comparative study of using either acetic acid(AA)or trifluoroacetic acid(TFA)as the representative UiO-66 organic modulators for synthesizing visible light responsive UiO-66(Zr)-X(X:nH_(2) or nO_(2))photocatalysts for water *** results show that photocatalytic hydrogen generation from a water/methanol mixture can be improved by varying the nature and amount of the modulator employed to prepare the different UiO-66(Zr)-X(X:nH_(2) or nO_(2))solid ***-66(Zr)-nH_(2) was the most active photocatalyst,followed by UiO-66(Zr)-nO_(2),both prepared with 12 equivalents of AA with respect to the organic *** UiO-66(Zr)-nH_(2) solid was more active than the parent MOF in photocatalytic overall water splitting(OWS)(H_(2) and O_(2) production of 450 and 160μmol·g^(-1),respectively,in 5 h;apparent quantum yield(AQY)at 400 nm of 0.06%)in the absence of methanol and compares favourably with analogous *** on the photocatalytic activity of the most active solids of both series was obtained by means of a series of techniques,including ultraviolet-visible(UV-vis)diffuse reflectance,X-ray photoelectron spectroscopy(XPS),laser flash photolysis(LFP),electron spin resonance(ESR),photoluminescence and photoelectrochemical measurements together with density functional theory(dFT)*** results showed that organic acid modulators can be used to enhance the photocatalytic activity of missing linker UiO-66 defective materials in solar-powered water splitting.

关键词： heterogeneous photocatalysis metal-organic frameworks(MOFs) UiO-66 materials carboxylic acid modulators water splitting solar light

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普通用户电子设备使用距离的特征分析

国际眼科杂志 2021年第9期21卷 1508-1514页

作者： Fernando Soler Alicia Sánchez-García Ainhoa Molina-Martín dolores de Fez valentín díaz david P Piñero Innova Ocular Clinica dr Soler 西班牙埃尔切03202 dr Soler Foundation of the Valencian Community 西班牙埃尔03202 阿里坎特大学药理学、解剖学与光学系西班牙阿里坎特03690

目的:分析普通用户使用电子设备/电脑的工作距离(Wd)及移动电话使用距离(MPUd)的特征。方法:横向描述性研究。经过筛选后,纳入每天使用电子设备/电脑超过2h的专业人员100例,年龄20-62(平均41.2)岁,测量每位受试者工作环境中使用电子设备... 详细信息

目的:分析普通用户使用电子设备/电脑的工作距离(Wd)及移动电话使用距离(MPUd)的特征。方法:横向描述性研究。经过筛选后,纳入每天使用电子设备/电脑超过2h的专业人员100例,年龄20-62(平均41.2)岁,测量每位受试者工作环境中使用电子设备/电脑的工作距离(Wd)、手臂长度和MPUd。结果:纳入受检者Wd明显长于MPUd(61.22±12.35 vs 32.22±6.35 cm;Pd明显短于臂长(74.44±4.65 cm;Pd和MPUd分别小于或等于40 cm。Wd与MPUd、手臂长度均呈弱相关性(r=0.387,Pd有显著差异(P=0.021),军队人员相比大学研究人员和讲师的Wd更长(P=0.025)。结论:普通用户使用电子设备/电脑的工作距离与移动电话使用距离差别较大,移动电话使用距离较近,这对于矫正老视具有一定的参考意义。

关键词：老视工作距离移动电话使用距离电子设备

Generalized Height-diameter Models for Pinus montezumae Lamb. and Pinus pseudostrobus Lindl. Plantations in Michoacan, Mexico

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Open Journal of Forestry 2024年第3期14卷 214-232页

作者： Jonathan Hernández-Ramos valentín José Reyes-Hernández Héctor Manuel de los Santos-Posadas Aurelio Manuel Fierros-González Enrique Buendía-Rodríguez Gerónimo Quiñonez-Barraza Instituto nacional de Investigaciones Forestales Agrcolas y Pecuarias (INIFAP)-Campo Experimental Bajo Celaya Guanajuato Mxico Colegio de Postgraduados (COLPOS) Campus Montecillo Mxico InIFAP Campo Experimental Valle de Mxico Texcoco Mxico InIFAP Campo Experimental Valle del Guardiana Durango Mxico

Tree height (H) in a natural stand or forest plantation is a fundamental variable in management, and the use of mathematical expressions that estimate H as a function of diameter at breast height (d) or variables at the stand level is a valuable support tool in forest inventories. The objective was to fit and propose a generalized H-d model for Pinus montezumae and Pinus pseudostrobus established in forest plantations of nuevo San Juan Parangaricutiro, Michoacan, Mexico. Using nonlinear least squares (nLS), 10 generalized H-d models were fitted to 883 and 1226 pairs of H-d data from Pinus montezumae and Pinus pseudostrobus, respectively. The best model was refitted with the maximum likelihood mixed effects model (MEM) approach by including the site as a classification variable and a known variance structure. The Wang and Tang equation was selected as the best model with nLS;the MEM with an additive effect on two of its parameters and an exponential variance function improved the fit statistics for Pinus montezumae and Pinus pseudostrobus, respectively. The model validation showed equality of means among the estimates for both species and an independent subsample. The calibration of the MEM at the plot level was efficient and might increase the applicability of these results. The inclusion of dominant height in the MEM approach helped to reduce bias in the estimates and also to better explain the variability among plots.

关键词： Random Covariate Random Effects Variance Structure Forest Inventories Forest Management Mixed Models

Coping with drought?Effects of extended drought conditions on soil invertebrate prey and diet selection by a fossorial amphisbaenian reptile

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Current Zoology 2023年第4期69卷 367-376页

作者： José Martín Jesús Ortega Roberto García-Roa Gonzalo Rodríguez-Ruiz Ana Pérez-Cembranos valentín Pérez-Mellado departamento de Ecología Evolutiva Museo Nacional de Ciencias NaturalesCSICMadridSpain Institute of Evolutionary Biology CSIC-Universitat Pompeu FabraBarcelonaSpain Ethology Lab Cavanilles Institute of Biodiversity and Evolutionary BiologyUniversity of ValenciaValenciaSpain departamento de Biología Animal Universidad de SalamancaSalamancaSpain

Arid climates are characterized by a summer drought period to which animals seem ***,in some years,the drought can extend for unusually longer *** the effects of these current extreme weather events on biodiversity can help to understand the effects of climate change,as models predict an increase in drought ***,we examined the effects of“unusual”extended drought on soil invertebrate prey availability and on diet composition(based on fecal contents)and diet selection of a fossorial amphisbaenian,the checkerboard worm lizard Trogonophis *** data show interannual variations in summer drought *** abundance and diversity of soil invertebrates in spring were high,and similar to those found in a“normal”early autumn,after some rain had ended with the summer *** contrast,in years with“unusual”extended drought,abundance,and diversity of soil invertebrates in early autumn were very ***,there were seasonal changes in amphisbaenians’diet;in autumn with drought,prey diversity,and niche breadth decreased with respect to spring and autumns after some rain had *** did not eat prey at random in any season,but made some changes in prey selection that may result from drought-related restrictions in prey ***,in spite that amphisbaenians showed some feeding flexibility,their body condition was lower in autumn than in spring,and much lower in autumn with *** extended drought became the norm in the future,amphisbaenians might suffer important negative effects for their health state.

关键词： amphisbaenians drought feeding ecology soil invertebrates Trogonophis wiegmanni weather conditions

dnA metabarcoding the diet of Podarcis lizards endemic to the Balearic Islands

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Current Zoology 2023年第5期69卷 514-526页

作者： Iris Alemany Ana Pérez-Cembranos valentín Pérez-Mellado JoséAurelio Castro Antònia Picornell Cori Ramon JoséA Jurado-Rivera deptartment of Biology Universitat de les Illes BalearsCtra.Valldemossa km 7’5Palma de Mallorca07122Balearic IslandsSpain and department of Animal Biology Universidad de SalamancaCampus Miguel de Unamuno s/n37007SalamancaSpain

dietary studies are essential to unravel the functioning of ecosystems and ultimately to understand *** task,which at first may seem simple,becomes especially complex in those cases of omnivorous species with highly variable *** this regard,the emergence of next-generation dnA sequencing methodologies represents a powerful tool to address the *** we implement a high-throughput metabarcoding strategy based on the analysis of four molecular markers aimed at sequencing both mitochondrial(animal prey)and chloroplast(diet plants)genome fragments from fecal samples of two lizard species endemic to the Balearic Archipelago(Podarcis lilfordi and ***)obtained through non-invasive *** results allowed for the characterization of their diets with a high degree of taxonomic detail and have contributed a large number of new trophic *** reported diets are based mainly on the consumption of arthropods,mollusks and plants from a diversity of taxonomic orders,as well as carrion and marine *** analyses also reveal inter-and intra-specific differences both in terms of seasonality and geographical distribution of the sampled lizard *** molecular findings provide new insights into the trophic interactions of these threatened endemic lizards in their unique and isolated ecosystems.

关键词： Balearic archipelago COI metabarcoding Podarcis lilfordi Podarcis pityusensis psbA-trnH rbcL trophic ecology

Anterior tibiofemoral dislocation after total knee arthroplasty:A case report and literature review

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Chinese Journal of Traumatology 2022年第4期25卷 237-241页

作者： Alejandro Almoguera-Martinez Catarina Godinho-Soares valentín Calcedo Bernal Jose-Antonio Pareja Esteban Marta Garcia-Lopez Miguel Angel Plasencia Arriba Orthopaedic and Traumatology Resident at Príncipe de Asturias Hospital Alcala de HenaresMadridSpain

Anterior tibiofemoral dislocation after total knee arthroplasty is an extremely rare and serious *** English-published papers,we found only 15 relevant cases,3 of which presented vascular *** manuscript aims to present a 77-year-old woman with a TC-Plus(Smith&nephew)cruciate-retaining type in first time of knee prosthesis,who suffered an anterior tibiofemoral dislocation and were admitted to our *** clinical management and outcome were ***,a review of literature was *** concluded that early detection and surgical intervention of vascular injury is the key in the survival of the *** there is still knee instability after acute recovery,it seems that revision surgery with constrained total knee arthroplasty can bring about good clinical and functional results.

关键词： Arthroplasty Knee dislocation Knee replacement Popliteal artery Risk factors

Phase diagram of a distorted kagome antiferromagnet and application to Y-kapellasite

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npj Computational Materials 2022年第1期8卷 79-88页

作者： Max Hering Francesco Ferrari Aleksandar Razpopov Igor I.Mazin Roser valentí Harald O.Jeschke Johannes Reuther Helmholtz-Zentrum Berlin für Materialien und Energie Hahn-Meitner Platz 114109BerlinGermany dahlem Center for Complex Quantum Systems and Fachbereich Physik Freie Universität Berlin14195BerlinGermany Institute for Theoretical Physics Goethe University FrankfurtMax-von-Laue-Straße 160438Frankfurt am MainGermany department of Physics and Astronomy and Quantum Science and Engineering CenterGeorge Mason UniversityFairfaxVA22030USA Research Institute for Interdisciplinary Science Okayama UniversityOkayama700-8530Japan

We investigate the magnetism of a previously unexplored distorted spin-1/2 kagome model consisting of three symmetry-inequivalent nearest-neighbor antiferromagnetic Heisenberg couplings J_(■),J,and J′,and uncover a rich ground state phase diagram even at the classical *** analytical arguments and numerical techniques we identify a collinear Q^(→)=0 magnetic phase,two unusual non-collinear coplanar Q^(→)=(1/3,1/3)phases and a classical spin liquid phase with a degenerate manifold of non-coplanar ground states,resembling the jammed spin liquid phase found in the context of a bond-disordered kagome *** further show with density functional theory calculations that the recently synthesized Y-kapellasite Y_(3)Cu_(9)(OH)_(19)C_(l8) is a realization of this model and predict its ground state to lie in the region of Q^(→)=(1/3,1/3)order,which remains stable even after the inclusion of quantum fluctuation effects within variational Monte Carlo and pseudofermion functional renormalization *** presented model opens a new direction in the study of kagome antiferromagnets.

关键词： group distorted diagram

Random Route and Quota Sampling: do They Offer Any Advantage over Probably Sampling Methods?

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Open Journal of Statistics 2014年第5期4卷 391-401页

作者： Vidal díaz de Rada valentín Martínez Martín Centro de Investigaciones Sociológicas Madrid Spain departamento de Sociología Public University of Navarre Pamplona Spain

The aim of this paper is to compare sample quality across two probability samples and one that uses probabilistic cluster sampling combined with random route and quota sampling within the selected clusters in order to define the ultimate survey units. All of them use the face-to-face interview as the survey procedure. The hypothesis to be tested is that it is possible to achieve the same degree of representativeness using a combination of random route sampling and quota sampling (with substitution) as it can be achieved by means of household sampling (without substitution) based on the municipal register of inhabitants. We have found such marked differences in the age and gender distribution of the probability sampling, where the deviations exceed 6%. A different picture emerges when it comes to comparing the employment variables, where the quota sampling overestimates the economic activity rate (2.5%) and the unemployment rate (8%) and underestimates the employment rate (3.46%).

关键词： Sampling Methods Random Sampling Multistage Cluster Sampling Random Route Method Quota Sampling

Association between cardiorespiratory fitness level and insulin resistance in adolescents with various obesity categories

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World Journal of diabetes 2023年第7期14卷 1126-1136页

作者： Lavinia La Grasta Sabolic Marija Pozgaj Sepec Bernardica valent Moric Maja Cigrovski Berkovic department of Pediatric Endocrinology and diabetology University Hospital Centre Sestre milosrdniceZagreb 10000Croatia School of Medicine Catholic UniversityZagreb 10000Croatia department for Sport and Exercise Medicine Faculty of Kinesiology University of ZagrebZagreb 10000Croatia

BACKGROUnd An association between cardiorespiratory fitness(CRF)and insulin resistance in obese adolescents,especially in those with various obesity categories,has not been systematically *** is a lack of knowledge about the effects of CRF on insulin resistance in severely obese adolescents,despite their continuous *** To investigate the association between CRF and insulin resistance in obese adolescents,with special emphasis on severely obese *** We performed a prospective,cross-sectional study that included 200 pubertal adolescents,10 years to 18 years of age,who were referred to a tertiary care center due to *** to body mass index(BMI),adolescents were classified as mildly obese(BMI 100% to 120% of the 95^(th)percentile for age and sex)or severely obese(BMI≥120% of the 95^(th)percentile for age and sex or≥35 kg/m^(2),whichever was lower).Participant body composition was assessed by bioelectrical impedance analysis.A homeostatic model assessment of insulin resistance(HOMA-IR)was *** oxygen uptake(VO_(2)max)was determined from submaximal treadmill exercise *** was expressed as VO_(2)max scaled by total body weight(TBW)(mL/min/kg TBW)or by fat free mass(FFM)(mL/min/kg FFM),and then categorized as poor,intermediate,or good,according to VO_(2)max *** were analyzed by statistical software package SPSS(IBM SPSS Statistics for Windows,Version 24.0).Pnsidered statistically *** A weak negative correlation between CRF and HOMA-IR was found[Spearman’s rank correlation coefficient(rs)=-0.28,Pne-way analysis of variance(AnOVA)revealed a significant main effect of CRF on HOMA-IR[F(2200)=6.840,P=0.001 for CRF_(TBW);F_((2200))=3.883,P=0.022 for CRF_(FFM)].Subsequent analyses showed that obese adolescents with poor CRF had higher HOMA-IR than obese adolescents with good CRF(P=0.001 for CRF_(TBW);P=0.018 for CRF_(FFM)).Two-w

关键词： Cardiorespiratory fitness Insulin resistance Obese adolescents Severe obesity Obesity category