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Journal of Wuhan University of Technology(Materials Science) 2018年第6期33卷 1293-1297页

作者： KESHTKAR Javad VARGAS GARCIA jorge Roberto GALAVIZ PEREZ Jorge MARTINEZ TRINIDAD José Escuela Superior de Ingenieria Mecánica y Eléctrica Instituto Politécnico NacionalMéxico07738CDMXMéxico Escuela Superior de Ingenieria Quimica e Industrias Extractivas Instituto Politécnico NacionalMéxico07738CDMXMéxico Universidad Juárez Autònoma de Tabasco DivisiònAcadémica Multidisciplinaria de Jalpa de MéndezRibera AltaJalpa de MéndezTabasco86205México

Al-doped ZnO(AZO) powders were prepared by using metal chloride precursors and the sol-gel technique. IR peaks observed at 1590 cm-1 and 1620 cm-1indicated the formation of metal chelate as a consequence of the addition of acetylacetone to the metal chloride solution. TG-DSC analysis of the AZO gels confirmed the formation of metal chelate as evidenced by the development of several weight loss peaks accompanied by the introduction of new endothermic peaks. The resulting AZO gels were annealed at 500, 600, and 800 ℃ to study the effect of annealing temperature. XRD and SEM results showed that crystallization of AZO gels takes place around 600 ℃. Hexagonal wurtzite structure was identified as the main phase for all the samples. In addition, small shift of the XRD(002) peak coupled with XPS results from the AZO powders confirmed the successful doping of the ZnO powders. Micron sized rod-like AZO powders were uniform in dimension and morphology and remained stable even at 800 ℃.

关键词： aluminum doped ZnO rod-like metal chloride sol gel acetylacetone

Primary repair of esophageal atresia Gross type C via thoracoscopic magnetic compression anastomosis: Is it the best option?

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WORLD JOURNAL OF GASTROINTESTINAL SURGERY 2024年第5期16卷 1474-1481页

作者： perez-Bertolez, Sonia Godoy-Lenz, jorge Univ Barcelona St Joan Deu Hosp Dept Pediat Surg Passeig St Joan Deu 2 Barcelona 08950 Spain Clin Alemana Santiago Dept Pediat Surg Santiago 7650568 Chile

Magnetic compression anastomosis is a promising treatment option for patients with complex esophageal atresia; but, at the present time, should not be the first therapeutic option in those cases where the surgeon can ... 详细信息

关键词： Esophageal atresia Tracheoesophageal fistula Thoracoscopy Magnamosis Magnetic anastomosis MAGNAMOSIS STRICTURES CHILDREN SURGERY

Efficient removal of the recalcitrant metamizole contaminant from drinking water by using a CaLaCoO_(9) perovskite supported on recycled polyethylene

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Journal of Environmental Sciences 2024年第2期136卷 56-67页

作者： Ernesto Valadez-Renteria Christian perez-Carrasco Dulce Yolotzin Medina-Velazquez Vicente Rodriguez-Gonzalez jorge Oliva CONACYT-División de Materiales Avanzados Instituto Potosino de Investigación Científica y Tecnológica A.C.San Luis PotosíSLP 78216México División de Ciencias Básicas e Ingeniería Universidad Autónoma Metropolitana AzcapotzalcoCol.Reynosa-TamaulipasC.P.MéxicoDF 02200México

Metamizole(MZ)is a widely used anti-inflammatory drug.Due to its common use,this contaminant is found in sewage and rivers.In order to reduce the contamination produced by the MZ,we fabricated in this work a photocatalytic composite using recycled polyethylene(RPE)and the CaLaCoO_(9)(LCCO)perovskite.Those nanoparticles had a microplate-like morphology and sizes of 1.4–5.5μm according to the analysis of microscopy.The photocatalytic properties of the LCCO powders were evaluated under ultraviolet-visible(UV-Vis)irradiation and found a removal efficiency of 96%.When the RPE+LCCO composite was employed for the photocatalytic degradation of MZ,a maximum degradation of 92.5%was obtained.The influence of the pH on the photocatalytic activity was also studied and found that an initial pH=3 produced a total degradation of MZ after 240 min of UV-Vis irradiation.Moreover,three reuse cycles were carried out for the pure LCCO powders and for the RPE+LCCO composites and found that the maximum loss of degradation was 5%.Furthermore,scavenger experiments demonstrated that the super oxide and hydroxyl radicals are formed during the photocatalytic reaction and were responsible for the degradation of MZ.Additionally,the X-ray photoelectron-spectroscopy and Raman analysis demonstrated the formation of defects(oxygen vacancies),those ones delayed the electron-hole recombination,which in turn,enhanced the degradation of the MZ.Thus,the studies performed in this work proved that composites made with recycled plastics and LCCO perovskites are a low-cost and feasible alternative for the cleaning of water sources polluted with pharmaceutical compounds.

关键词： Photocatalysis Metamizole Pharmaceutical contaminant UV-Vis irradiation Perovskite

The “Brain Stress Timing” phenomenon and other misinterpretations of randomized clinical trial on aneurysmal subarachnoid hemorrhage

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Neural Regeneration Research 2019年第8期14卷 1364-1366页

作者： Rafael Martinez-perez Natalia Rayo Agustin Montivero jorge Marcelo Mura Division of Neurosurgery Institute of Clinical Neurosciences Universidad Austral de Chile Valdivia Chile Division of Cerebrovascular and Skull Base Neurosurgery Institute of Neurosurgery Dr Asenjo Santiago Chile Western University London ON Canada

Clipping and coiling are currently the two alternatives in treatment of ruptured cerebral aneurysms. In spite of some meritorious analysis, further discussion is helpful to understand the actual state of art. Retreatment and rebleeding rates clearly favors clipping, although short-term functional outcome seems to be beneficial for clipping, while this different is not such if we perform the comparison at a longer follow up. Longterm follow ups and cost analysis are mandatory to have a clear view of the current picture in treatment of subarachnoid hemorrhage. Treatment strategy should be made by a multi-disciplinary team in accredited centers with proficient experience in both techniques.

关键词： sAH subarachnoid hemorrhage coiling clipping ruptured aneurysm timing intracranial

A novel and stretchable carbon-nanotube/Ni@TiO_(2):W photocatalytic composite for the complete removal of diclofenac drug from the drinking water

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Journal of Environmental Sciences 2023年第4期126卷 575-589页

作者： Ernesto Valadez-Renteria Rafael perez-Gonzalez Christian Gomez-Solis Luis Armando Diaz-Torres Armando Encinas jorge Oliva Vicente Rodriguez-Gonzalez Consejo Nacional de Ciencia y Tecnología-División de Materiales Avanzados Instituto Potosino de Investigación Científica y TecnológicaSan Luis Potosí78216México División de Ciencias e Ingenierías Universidad de GuanajuatoLeón 37150México Grupo de Espectroscopia de Materiales Avanzados y Nanoestructurados(GEMANA) Centro de Investigaciones enópticaA.C.Lomas Del CampestreLeón 37150México

We present the structural,morphological and photocatalytic properties of stretchable composites made with carbon nanotubes (CNTs),silicon rubber and Ni@TiO_(2):W nanoparticles(TiWNi NPs) with average size of 37±2 nm.Microscopy images showed that the TiWNi NPs decorated the surface of the CNT fibers,which are oriented in a preferential direction.TiWNi NPs presented a mixture of anatase/rutile phases with cubic structure.The performance of the TiWNi powders and stretchable composites was evaluated for the photocatalytic degradation of diclofenac (DCF) anti-inflammatory drug under ultraviolet-visible light.The results revealed that the maximum DCF degradation percentages were 34.6%,91.9%,97.1%,98.5%and 100%for the CNT composite (stretched at 0%),TiWNi powders,CNT+TiWNi(stretched at 0%),CNT+TiWNi (stretched at 50%) and CNT+TiWNi (stretched at 100%),respectively.Thus,stretching the CNT+TiWNi composites was a good strategy to enhance the DCF degradation percentage from 97.1%to 100%,since stretching created additional defects (oxygen vacancies) that acted as electron sink,delaying the electron-hole recombination,and favors the DCF degradation.Raman/absorbance measurements confirmed the presence of such defects.Moreover,the reactive oxygen species (ROS) were determined by the scavenger’s experiments and found that the main ROS were the·OH and O_(2)-radicals,which attacked the DCF molecules,causing their degradation.The results of this investigation confirmed that the stretchable CNT/TiWNi-based composites are a viable alternative to remove pharmaceutical contaminants from water and can be manually separated from the decontaminated water,which is unviable using photocatalytic powders.

关键词： Diclofenac Pharmaceutical contaminant TiO_(2) Carbon nanotubes Stretchable composite Photocatalysis

The new Caribbean Nitrogen Index to assess nitrogen dynamics in vegetable production systems in southwestern Puerto Rico

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International Soil and Water Conservation Research 2017年第1期5卷 69-75页

作者： Miguel Oliveras-Berrocales David Sotomayor-Ramirez jorge A.Delgado Luis R.perez-Alegriad USDA-NRCS Arkansas:2603 Federal Building100 E8th AvePine BluffAR 71601USA University of Puerto Rico Mayaguez CampusCollege of Agricultural SciencesDepartment of Agroenvironmental SciencesPO Box 9000MayagüezPR 00680USA USDA-ARS Acting Research LeaderSoil Management and Sugar Beet Research Unit2150 Centre Ave.Building DSuite 100Fort CollinsCO 80526USA University of Puerto Rico Mayaguez CampusCollege of Agricultural SciencesDepartment of Agricultural and Biosystems EngineeringUSA

Nutrient loss from agricultural fields is one of the main factors influencing surface-and ground-water quality.Typical fertilizer nitrogen(N)consumption rates in vegetable production systems and horticultural crops in Puerto Rico fluctuate between 112 and 253 kg N/ha.The nitrogen use efficiency of vegetable crops is low,increasing the potential for nitrogen losses and high residual soil nitrate content.Quantification of residual soil N and N losses to the environment can be a difficult task.Simulation models such as the USDA-ARS N Index can be used to identify the relative magnitude of varying N-loss pathways and to identify best management practices.Field studies were conducted to quantify residual soil N and crop N removal,and to validate the Nitrogen Index in onion,tropical pumpkin and tomato production systems in the Lajas Valley in southwestern Puerto Rico.Relationships between observed and simulated values were determined to examine the capability of the model for evaluating N losses.There was good correlation between observed and predicted values for residual soil N(r=0.88)and crop N removal(r=0.99)(p<0.05).In the production systems evaluated,the N volatilization losses ranged from 1 to 4 kg N/ha,the denitrification losses ranged from 18 to 46 kg N/ha,the leaching losses ranged from 155 to 779 kg N/ha,and the residual soil nitrate ranged from 64 to 401 kg N/ha.The N use efficiency ranged from 15% to 39%.The results obtained showed that the Nitrogen Index tool can be a useful tool for evaluating N transformations in vegetable production systems of Puerto Rico's semi-arid zone.

关键词： Nitrogen index Nitrogen management Residual soil N Crop N removal

Formation potential and analysis of 32 regulated and unregulated disinfection by-products: Two new simplified methods

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Journal of Environmental Sciences 2022年第7期34卷 209-221页

作者： Jillian N.Murakami Xu Zhang Joanne Ye Amy M.MacDonald jorge perez David W.Kinniburgh Susana Y.Kimura Department of Chemistry University of CalgaryCalgaryAlbertaT2N 1N4Canada Alberta Centre for Toxicology University of CalgaryCalgaryAlbertaT2N 4N1Canada

Water disinfection is an essential process that provides safe water by inactivating pathogens that cause waterborne diseases. However, disinfectants react with organic matter naturally present in water, leading to the formation of disinfection by-products(DBPs). Multi-analyte methods based on mass spectrometry(MS) are preferred to quantify multiple DBP classes at once however, most require extensive sample pre-treatment and significant resources. In this study, two analytical methods were developed for the quantification of 32 regulated and unregulated DBPs. A purge and trap(P&T) coupled with gas chromatography mass spectrometry(GC-MS) method was optimized that automated sample pre-treatment and analyzed volatile and semi-volatile compounds, including trihalomethanes(THMs), iodinated trihalomethanes(I-THMs), haloacetonitriles(HANs), haloketones(HKTs) and halonitromethanes(HNMs). LOQs were between 0.02-0.4 μg/L for most DBPs except for 8 analytes that were in the low μg/L range. A second method with liquid chromatography(LC) tandem mass spectrometry(MS/MS) was developed for the quantification of 10 haloacetic acids(HAAs) with a simple clean-up and direct injection. The LC-MS/MS direct injection method has the lowest detection limits reported(0.2-0.5 μg/L). Both methods have a simple sample pre-treatment, which make it possible for routine analysis. Hyperchlorination and uniform formation conditions(UFC) formation potential tests with chlorine were evaluated with water samples containing high and low TOC. Hyperchlorination formation potential test maximized THMs and HAAs while UFC maximized HANs. Ascorbic acid was found to be an appropriate quencher for both analytical methods. Disinfected drinking water from four water utilities in Alberta, Canada were also evaluated.

关键词： Disinfection byproducts Purge and trap LC-MS/MS Drinking water DBP formation potential HAAs HANs

One image is worth more than a thousand words:producing an atlas of medical signs for teaching clinical and forensic toxicology

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Forensic Sciences Research 2022年第4期7卷 815-822页

作者： Ricardo jorge Dinis-Oliveira TOXRUN-Toxicology Research Unit University Institute of Health SciencesAdvanced Polytechnic and University Cooperative(CESPU)CRLGandraPortugal Department of Public Health and Forensic Sciences and Medical EducationFaculty of MedicineUniversity of PortoPortoPortugal UCIBIO-REQUIMTE Laboratory of ToxicologyDepartment of Biological SciencesFaculty of PharmacyUniversity of PortoPortoPortugal

Clinical and forensic toxicology are critically involved in the acquisition of basic skills to correctly suspect intoxication,collect biological and non-biological materials for toxicological analysis,comprehend the complexities inherent to laboratory activity,and understand the fundamentals of toxicokinetics and toxicodynamics that underlie the interpretation of results.This works presents a pedagogical innovation proposal for the teaching of clinical and forensic toxicology based on a compilation of more than 3000 cases where the image was fulcra for suspicion.The experience in this article follows the model practiced in bachelors,masters,and PhD degrees,as well as in other continuing training courses,where we are teaching toxicology for more than 15 years.All these levels of education are considered fundamental to the sound development of this science.This approach aims also to offer strength to the intervention of the true toxicologist in all the toxicological phases,besides the classic analytical chemistry.Indeed,it is impossible to provide effective clinical and forensic toxicological interpretations without a proper and broad education,and not thinking exclusively in terms of laboratory techniques.In the future,it will be interesting to evaluate knowledge retention and to propose a database of videos of signs related to intoxications.

关键词： Forensic sciences clinical and forensic toxicology teaching learning signs of exposure pre-analytical phase

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味物理中破坏轻子普适性的新相互作用?

Science Bulletin 2022年第1期67卷 1-4,M0003页

作者： jorge Martin Camalich Mitesh Patel Instituto de Astrofísica de Canarias Calle Via Lactea S-NTenerife 38200Spain Departamento de Astrofísica Universidad de La LagunaTenerife 38205Spain Imperial College London London SW72AZUK

The Standard Model(SM)of particle physics succeeds in predicting the vast majority of experimental high-energy data in terms of a minimal set of subatomic particles and their strong and electroweak interactions.Howeve... 详细信息

关键词： theory interactions predicting

Physical exercises for preventing injuries among adult male football players:A systematic review

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Journal of Sport and Health Science 2022年第1期11卷 115-122页

作者： jorge Pérez-Gómez JoséCarmelo Adsuar Pedro EAlcaraz jorge Carlos-Vivas Health EconomyMotricity and Education(HEME)Research GroupFaculty of Sports SciencesUniversity of ExtremaduraCaceres 10003Spain UCAM Research Center for High Performance Sport Catholic University of MurciaMurcia 30107Spain Faculty of Sport Sciences Catholic University of MurciaMurcia 30107Spain

Background:Football is the most practised sport in the world and is associated with the risk of injuries in the players.Some studies have been published that identify injury prevention programs,but there is no review of the full body of evidence on injury prevention programs for use by football coaches.The aim of this article was to carry out a systematic review of published studies on injury prevention programs for adult male footballers,identify points of common understanding and establish recommendations that should be considered in the design of injury prevention strategies.Methods:PubMed and EMBASE databases were used to identify relevant published articles using the following keywords:"soccer"AND"injury"AND"prevention".Results:A total of 2512 studies were identified initially,but only 11 studies met the inclusion criteria,and their outcomes are presented.Results revealed that injury prevention programs in football have focused on strength training,proprioceptive training,multicomponent programs(balance,core stability,and functional strength and mobility),and warm-up programs.Conclusion:Based on results from the studies analyzed,football players can lower the incidence of match and training injuries by participating in dynamic warm-up programs that include preventive exercises before games or during training sessions,and by adding strength,balance,and mobility training to the training sessions.

关键词： Balance Core stability Injury prevention programs Soccer Warm-up