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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

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 *** to its common use,this contaminant is found in sewage and *** 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)*** nanoparticles had a microplate-like morphology and sizes of 1.4–5.5μm according to the analysis of *** 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 *** 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 ***,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 ***,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 ***,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

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

Possibility of Predicting Category-5 North Atlantic Hurricanes

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Journal of Earth Science and Engineering 2014年第9期4卷 572-579页

作者： jorge perez-Peraza Alan Juarez Zuniga Instituto de Geofisica Universidad Nacional Autonoma de Mexico Coyoacan 04510 Mexico

Category-5 hurricanes are the most devastating from the standpoint of human and economic losses. The occurrence of this kind of hurricane is believed to be of quasi-random nature, so it is very difficult to predict them well in advance. Warnings at this regard are generally given in the course of their development. We propose here, that there are some inherently periodicities of the phenomena that allow to predict category-5 hurricanes, even with some years of anticipation. For our study, we consider the North Atlantic category-5 hurricanes since 1920. We consider in this study data of the SST （sea surface temperature） of the North Atlantic Ocean as a representative parameter of hurricane activity. Then, by means of the wavelet analysis, we determine the dominant oscillation periods and establish correspondence rules using fuzzy logic. The wavelet power spectrum yields the following dominant periodicities： 0.5, 1, 3, 11, 22 and 32 years. The fuzzy logic searches for associations between the hurricanes occurrence and the behavior of the harmonics. Such correspondence rules lead us to restrict dates of possible hurricane occurrence. Interpolation of the periodic behavior allows for a good reconstruction of past hurricanes dates since 1920, as well as extrapolation to predict dates of occurrence in the future. We conclude that the conditions for the formation of the next category-5 hurricane in the North Atlantic may occur during the seasons of 2015-2017 with the highest probability in 2017.

关键词： North Atlantic Hurricane Predictions.

Importance of Investing on Emergency and Disaster Preparedness At Country Level

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Importance of Investing on Emergency and Disaster Preparedne...

Importance of Investing on Emergency and Disaster Preparedness at Country Level

北京论坛（2006）文明的和谐与共同繁荣—对人类文明方式的思考

作者： Luis jorge perez Calderon Deputy Executive Director Asian Disaster Preparedness Center Thailand Bangkok Former Regional Advisor Emergency Humanitarian Action World Health Organization South East Asia Regional Office

It is a known fact that in any type of an emergency or major event,the Health Sector is always called to *** other occasions it is asked to lead,such as in the case of *** sometimes it has to provide immediate results...

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Inflammatory effect on the gastrointestinal system associated with COVID-19

文明的和谐与共同繁荣：对人类文明方式的思考——北京论坛（2006）

作者： Luis jorge perez Calderon Deputy Executive Director Asian Disaster Preparedness Center

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World Journal of Gastroenterology 2021年第26期27卷 4160-4171页

作者： Paulina Delgado-Gonzalez Carlos A Gonzalez-Villarreal jorge A Roacho-perez Adriana G Quiroz-Reyes Jose Francisco Islas Juan Luis Delgado-Gallegos Daniel Arellanos-Soto Kame A Galan-Huerta Elsa N Garza-Treviño Departamento de Bioquimica y Medicina Molecular UANLMonterrey 64610Nuevo LeónMexico Universidad de Monterrey UDEM Vicerrectoria de Ciencias de la SaludMonterrey 66238Nuevo LeonMexico

The severe acute respiratory syndrome-coronavirus-2(SARS-CoV-2)that causes coronavirus disease-2019(COVID-19)has provoked a global pandemic,mainly affecting the respiratory tract;however,a percentage of infected individuals can develop gastrointestinal(GI)*** studies describe the development of GI symptoms and how they affect the progression of *** this review,we summarize the main mechanisms associated with gut damage during infection by SARS-CoV-2 as well as other organs such as the liver and *** only are host factors associated with severe COVID-19 but intestinal microbiota dysbiosis is also observed in patients with severe disease.

关键词： SARS-CoV-2 Gastrointestinal symptoms COVID-19 Gastrointestinal system

Plasmonic metal-organic frameworks for surface-enhanced Raman scattering

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Plasmonic metal-organic frameworks for surface-enhanced Rama...

Support Vector Machines for Regression: A Succinct Review of Large-Scale and Linear Programming Formulations

第二十届全国光散射学术会议（CNCLS20）

作者：郑广超 jorge perez-Juste 洪梅 Sara Bals Luis M.Liz-marzan 郑州大学物理工程学院 CINBIO Campus Universitario Lagoas-Marcosende 化学生物学与生物技术学院北京大学深圳研究生院 EMAT-University of Antwerp CIC biomaGUNE Bionanoplasmonics Laboratory

金属-有机骨架化合物（metal–organic frameworks,MOFs）由于其比表面积大、孔径均一等优点,在催化、光学、电学等领域引起了广泛的关注。最近,基于MOFs的形貌控制研究其性能的形貌依赖性是一个热点。众所周知,表面活性剂能够很好的控... 详细信息

金属-有机骨架化合物（metal–organic frameworks,MOFs）由于其比表面积大、孔径均一等优点,在催化、光学、电学等领域引起了广泛的关注。最近,基于MOFs的形貌控制研究其性能的形貌依赖性是一个热点。众所周知,表面活性剂能够很好的控制晶体纳米颗粒的形貌。在这里,我们设计了一种利用双表面活性剂,十六烷基三甲基溴化铵（cetyltrimethylammonium bromide,CTAB）和三羟甲基氨基甲烷（tris（hydroxymethyl）aminomethane,TRIS）,来有效的控制MOFs的形貌[1]。另外,单一的金属纳米颗粒包覆在MOFs当中形成的核-壳结构能够有效的提高该等离激元MOFs在催化过程中的稳定性和选择性。我们发展了一种不依赖与金属纳米颗粒形貌、组分、尺寸的等离激元MOFs的制备方法。同时,由于等离激元纳米颗粒的局域表面等离子体共振效应,等离激元MOFs还可以通过利用表面增强拉曼散射（surface-enhanced Raman scattering,SERS）研究了MOFs孔径的灵活性[2]。

关键词：等离激元MOFs 孔径灵活性表面增强拉曼散射

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International Journal of Intelligence Science 2013年第1期3卷 5-14页

作者： Pablo Rivas-Perea Juan Cota-Ruiz David Garcia Chaparro jorge Arturo perez Venzor Abel Quezada Carreón Jose Gerardo Rosiles Department of Computer Science School of Engineering & Computer Science Baylor University Waco USA Department of Electrical & Computer Engineering Autonomous University of Ciudad Juárez Ciudad Juárez México Rosiles Consulting El Paso USA

Support Vector-based learning methods are an important part of Computational Intelligence techniques. Recent efforts have been dealing with the problem of learning from very large datasets. This paper reviews the most commonly used formulations of support vector machines for regression (SVRs) aiming to emphasize its usability on large-scale applications. We review the general concept of support vector machines (SVMs), address the state-of-the-art on training methods SVMs, and explain the fundamental principle of SVRs. The most common learning methods for SVRs are introduced and linear programming-based SVR formulations are explained emphasizing its suitability for large-scale learning. Finally, this paper also discusses some open problems and current trends.

关键词： Support Vector Machines Support Vector Regression Linear Programming Support Vector Regression

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