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Analysis of Health Risk Due to the Presence of Radioactivity and Chemical Elements in Groundwater,Aldama Municipality,Chihuahua,Mexico

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Journal of Environmental Protection 2013年第11期4卷 1265-1271页

作者： Lourdes Villalba Luis Colmenero-Sujo Adan Pinales-Munguia Guadalupe Estrada-Gutierrez Hector Rubio-Arias Fernando Mireles-Garcia ignacio davila-rangel College of Engineering Autonomous University of ChihuahuaCircuito No.1Campus UniversitarioChihuahuaChih.Mexico Technology of Chihuahua Institute ChihuahuaChih.Mexico College of Animal Husbandry and Ecology Autonomous University of Chihuahua.Periferico Francisco R.AlmadaChihuahuaChih.Mexico Regional Center of Nuclear Studies Autonomous University of ZacatecasCipres 10Frac.La PenuelaZacatecasZac.Mexico

There exist potential health risks due to the presence of some elements in groundwater. This study presents measurements of gross alpha and beta activity and chemical concentrations (fluorides and nitrates) in 25 water wells in Aldama municipality, Chihuahua, Mexico. Total alpha and beta emitter analyses were performed at the Academic Unit of Nuclear Studies at the Autonomous University of Zacatecas. Radioactive elements were concentrated by total evaporation. All samples were measured with a Wallac-Oy 1411 liquid scintillate with a pulse separation option (Pulse Shape Analysis) for 6 h. Fluorine and nitrate analyses were performed at the Faculty of Engineering of the Autonomous University of Chihuahua by flow injection-hydride generation collection-atomic absorption spectrometry. Exposure levels were calculated for each well and found to exceed maximum limits allowed under Mexican law in terms of 1) gross alpha and beta activity;and 2) fluoride and nitrate concentrations. Gross alpha activity in two wells exceeded the reference value of 0.56 Bq·L-1. Fluorides and nitrates were found in 40% and 48% of water wells, respectively. Fluoride values were higher than 1.5 mg·L-1, and the exposure doses for adults and children exceeded the reference value of 0.06 mg·kg-1·d-1. Children are the most vulnerable, since their intake doses are near or above of 0.12 mg·kg-1·d-1 of the minimum level of risk for the development of skeletal fluorosis or bone fractures. On the other hand, while nitrate concentrations in water wells exceeded the drinking water limit of 10 mg·L-1, this does not represent a serious health risk, since the calculated exposure doses for adults and children are below the chronic reference level of 1.6 mg·kg-1·d-1established by the USEPA.

关键词： Dose Fluorides Nitrates Public Health Radioactivity Well Water

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Attenuation of UV-C Solar Radiation as a Function of Altitude(0≤z≤100 km):Rayleigh Diffusion and Photo Dissociation of O_(2) Influence

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Atmospheric and Climate Sciences 2017年第4期7卷 540-553页

作者： Jose Luis Pinedo-Vega Carlos Rios-Martínez David Jacobo Navarro-Solis J.ignacio davila-rangel Fernando Mireles-Garcia Sonia Azucena Saucedo-Anaya Eduardo Manzanares-Acuna Valentin Badillo-Almaraz Department:UAEN Universidad Autonoma de ZacatecasZacatecasMexico

In this paper, we present an analysis of attenuation for UV-C radiation () as a function of the altitude z () by calculating the interaction ratio between the UV-C radiation and the molecular species susceptible of interact with UV-C radiation. The Rayleigh scattering spectral cross sections were calculated, the UV-C spectral cross sections of the species susceptible of interact with UV-C radiation and the UV extraterrestrial (ETR) solar spectrum were standardized with wavelength steps of 1 nm, and The International Standard Atmosphere model (ISO 1972) was adapted to calculate the molecular density. These data were utilized to calculate the photodissociation and Rayleigh scattering ratios as a function of the altitude and to determine to what measure the photodissociation and the Rayleigh diffusion were determinants of the attenuation of UV-C radiation. It became clear that the photo dissociation of O2 is the primordial mechanism of attenuation for the UV-C radiation, but the Rayleigh diffusion appears like a mechanism that encreases the photon flux, raising the performance of the O2 photodissociation. The attenuation capacities of N2O, CO2 and water vapor (H2O) over the UV-C radiation are all similar, although smaller (less than 0.6%), and this is due to their low concentration. The O3, has the theoretical greater attenuation capacity, but it is found in mid-range altitudes? (), where the residual UV-C photons has almost vanished by O2 photo dissociation or Rayleigh diffusion, so the real effect over the UV-C attenuation is minimum.

关键词： UV-C Radiation Rayleigh Scattering O_(2) Photodissociation

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Generation of lossy mode resonances(LMR)using perovskite nanofilms

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Opto-Electronic Advances 2024年第2期7卷 33-40页

作者： Dayron Armas ignacio R.Matias M.Carmen Lopez-Gonzalez Carlos Ruiz Zamarreño Pablo Zubiate ignacio del Villar Beatriz Romero Electrical Electronic and Communications Engineering DepartmentPublic University of NavarraPamplona 31006Spain Institute of Smart Cities(ISC) Public University of NavarraPamplona 31006Spain Experimental Science and Technology School Rey Juan Carlos UniversityMostoles 28933Spain

The results presented here show for the first time the experimental demonstration of the fabrication of lossy mode resonance(LMR) devices based on perovskite coatings deposited on planar waveguides. Perovskite thin films have been obtained by means of the spin coating technique and their presence was confirmed by ellipsometry, scanning electron microscopy, and X-ray diffraction testing. The LMRs can be generated in a wide wavelength range and the experimental results agree with the theoretical simulations. Overall, this study highlights the potential of perovskite thin films for the development of novel LMR-based devices that can be used for environmental monitoring, industrial sensing, and gas detection, among other applications.

关键词： perovskite thin films slab waveguide lossy mode resonance

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Experimental implementation of phase triplicator gratings in a spatial light modulator

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Chinese Optics Letters 2024年第2期22卷 64-69页

作者：高尚 María del Mar Sánchez-López ignacio Moreno Instituto de Bioingeniería Universidad Miguel HernándezElche 03202Spain Departamento de Física Aplicada Universidad Miguel HernándezElche 03202Spain Departamento de Ciencia de Materiales Óptica y Tec.Electr´onicaUniversidad Miguel HernándezElche 03202Spain

In this work,we compare different methods for implementing a triplicator,a phase grating that generates three equiintense diffraction *** design with optimal efficiency features a continuous phase profile,which cannot be easily reproduced,and is typically affected by *** compare its performance with binary and sinusoidal phase *** also analyze the effect of quantizing the phase ***,a random approach is adopted to eliminate the additional harmonic *** all cases,a liquid-crystal-on-silicon spatial light modulator is employed to experimentally verify and compare the different approaches.

关键词： diffraction gratings phase modulation triplicator spatial light modulators

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Navigating the controversy regarding antibiotic prophylaxis in acute variceal bleeding

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World Journal of Gastroenterology 2024年第18期30卷 2485-2487页

作者： David Aguirre-Villarreal ignacio García-Juárez Department of Gastroenterology and Liver Transplant Unit Instituto Nacional de Ciencias Médicas y Nutrición Salvador ZubiránMexico City 14080Mexico

Antibiotic prophylaxis in patients with cirrhosis and acute variceal bleeding is part of the standard of care according to most clinical ***,with recent evidence arguing against antibiotic prophylaxis,the role of this... 详细信息

关键词： Cirrhosis Acute variceal bleeding Antibiotic prophylaxis Endoscopic band ligation Spontaneous bacterial peritonitis

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Optimizing artificial intelligence in sepsis management: Opportunities in the present and looking closely to the future

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Journal of Intensive Medicine 2024年第1期4卷 34-45页

作者： Darragh O’Reilly Jennifer McGrath ignacio Martin-Loeches Department of Intensive Care Medicine Multidisciplinary Intensive Care Research Organization(MICRO)St James’HospitalDublinIreland Department of Respiratory Intensive care Hospital ClinicUniversitat de BarcelonaIDIBAPSCIBERESBarcelonaSpain

Sepsis remains a major challenge internationally for healthcare *** incidence is rising due to poor public awareness and delays in its recognition and subsequent *** sepsis,mortality increases with every hour left *** intelligence(AI)is transforming worldwide healthcare delivery at *** review has outlined how AI can augment strategies to address this global disease *** and machine learning(ML)algorithms can analyze vast quantities of increasingly complex clinical datasets from electronic medical records to assist clinicians in diagnosing and treating sepsis earlier than traditional *** review highlights how these models can predict the risk of sepsis and organ failure even before it *** gives providers additional time to plan and execute treatment plans,thereby avoiding increasing complications associated with delayed diagnosis of *** potential for cost savings with AI implementation is also discussed,including improving workflow efficiencies,reducing administrative costs,and improving healthcare *** these advantages,clinicians have been slow to adopt AI into clinical *** of the limitations posed by AI solutions include the lack of diverse data sets for model building so that they are widely applicable for routine clinical ***,the subsequent algorithms are often based on complex mathematics leading to clinician hesitancy to embrace such ***,we highlight the need for robust political and regulatory frameworks in this area to achieve the trust and approval of clinicians and patients to implement this transformational technology。

关键词： Artificial intelligence Data science Machine learning Intensive care unit(ICU) Critical care Sepsis

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Insights into complications after unicompartmental knee arthroplasty

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World Journal of Clinical Cases 2024年第25期12卷 5662-5664页

作者： Tomas Nicolino ignacio Garcia-Mansilla Knee Division Hospital Italiano de Buenos AiresCapital Federal 1109Argentina

Zhao's study,offers a comprehensive analysis of unicompartmental knee arthroplasty(UKA)revision *** study provides a detailed,case-by-case analysis of the factors leading to knee revision surgery in 13 *** only elucidates the complexities of UKA revisions but also underscores the importance of continuous improvement in surgical techniques and the adoption of innovative technologies.

关键词： Unicompartmental knee arthroplasty UKA Complications Revision Total knee arthroplasty

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Damage Mechanism of CK2 and IKAROS in Philadelphia Like Acute Lymphoblastic Leukemia

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Journal of Biosciences and Medicines 2024年第4期12卷 49-59页

作者： ignacio Vélez-Rodríguez Victoria Carranza-Aranda Facultad Mexicana de Medicina Universidad La Salle Tlalpan M&#233xico Hospital General de Mé xico Cuauht&#233moc M&#233xico

Acute lymphoblastic leukemia (ALL) is characterized by immature and poorly differentiated B lymphocytes in large numbers in the blood. B cells are distinct from the cell types involved in their development (common lymphoid progenitor cells, pro-B cells, pre-B cells, and mature cells). The process of B cell maturation depends on precise communication within the cell: signals activate specific genes that are essential for proper development. Errors in this intricate signaling network can lead to issues with B cell function and contribute to disease. B-lineage acute lymphoid leukemias, malignancies of precursor-stage B lymphoid cells inhibit lymphoid differentiation, leading to abnormal cell proliferation and survival. The process of developing leukemia (leukemogenesis) can be triggered by an overproduction of both hematopoietic stem cells (the cells that form all blood cells) and the immature versions of white blood cells called lymphoblasts. Acute lymphoblastic leukemia (ALL) with the presence of the Philadelphia chromosome (ALL Ph) is classified as a high-risk manifestation of the disease, this chromosome is the product of the reciprocal translocation, whose product is a BCR-ABL fusion protein. It is a highly active tyrosine kinase that can transform hematopoietic cells into cytokine-independent. Hyperphosphorylation cascades inhibit the differentiating function of IKZF1 as a tumor suppressor gene which leads to an abnormal proliferation of B cells due to the presence of the Philadelphia chromosome;it inhibits the differentiating process, leukemogenesis involving immature B cells in the bloodstream can result from the uncontrolled growth and division of hematopoietic stem cells and immature lymphoblasts (the precursors to B cells).

关键词： Acute Lymphoblastic Leukemia IKAROS Dephosphorylation Philadelphia Chromosome CK2

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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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Patellar reconstruction in primary total knee arthroplasty using bone chips from routine cuts:A case report and review of literature

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World Journal of Methodology 2024年第2期14卷 158-166页

作者： Juan ignacio Perez-Abdala Franco L De Cicco Tomas Nicolino Juan Astoul Institute of Orthopaedics“Carlos E.Ottolenghi” Italian Hospital of Buenos AiresCapital Federal 1198Argentina

BACKGROUND Total patellectomy is currently reserved for exceptional cases,such as recalcitrant patellofemoral instability and comminuted fractures,due to its demonstrated negative impact on knee ***,managing patellectomy is crucial to mitigate its inherent deleterious *** techniques have been described,including autologous or allogeneic bone grafts for reconstruction and soft tissue realignment to enhance the extensor *** SUMMARY A 73-year-old male underwent a patellectomy due to a comminuted fracture,subsequently developing osteoarthritis and experiencing a decline in functional *** with total knee replacement,we conducted a patellar reconstruction,incorporating routine bone cuts and utilizing bone chips to fashion a new *** intervention resulted in the restoration of full extension and improvement of knee *** Patellar reconstruction demonstrates benefits on knee mechanics and stabilization,contributing to enhanced outcomes and satisfaction following knee *** present an affordable technique for managing patellectomized patients undergoing total knee replacement.

关键词： Patellectomy Patella Reconstruction Knee arthroplasty Autologous bone Knee osteoarthritis Case report

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