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Study of the Adsorption Space of Modified Clinoptilolites

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材料科学与工程（中英文B版） 2013年第5期3卷 263-280页

作者： Rolando Roque-Malherbe Alba N. Costa-Hernandez Christymarie Rivera-Maldonado Frances N.lugo-alvarado ramon Polanco-Estrella Institute for Physical Chemical Applied Research School of Science University of Turabo Gurabo PR 00778-3030 USA

Academic Stress Assessment Using Virtual Reality as an Educational Tool in Spine Surgery

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Open Journal of Modern Neurosurgery 2024年第2期14卷 114-123页

作者： Diana Chávez lizárraga Jesús Alberto Pérez Contreras Fernando alvarado Gómez Evelyn Quintero Medina Emmanuel Cantú Chávez Iván Ulises Sámano lópez Ana Sofía Peña Blesa Department of Neurosurgery ángeles Pedregal Ciudad de México México Department of Traumatology and Orthopedics Hospital Santa Fe Bogotá Colombia

Introduction: The evaluation of academic stress in medical students and residents is a topic of significant interest, given the considerable challenges they face during their learning process with traditional teaching methods. The use of technologies like virtual reality presents an opportunity to enhance their skills through simulations and training. The main objective of this study is to qualitatively assess the stress levels experienced by medical students and residents by integrating virtual reality into their current learning methods, aiming to improve their ability to manage stressors in their practice. Material and Methods: A questionnaire was conducted with 12 medical students and 12 Traumatology and orthopedics residents. The purpose of the questionnaire was to evaluate the levels of academic stress using the SISCO inventory. The stress levels were calculated by transforming average values into percentages, and the following criteria were assigned: 0 to 33% for Mild Stress, 34 to 66% for Moderate Stress, and 67 to 100% for Deep Stress. Then, a virtual reality class focused on spine surgery was provided. Both medical students and residents were trained using the Non Nocere SharpSurgeon software platform and Oculus Quest 2 virtual reality glasses. At the end of the session, a second questionnaire related to the practice with virtual reality was conducted with the same evaluation criteria and a comparative analysis was carried out. Results: 12 undergraduate students from Hospital Angeles Mexico, CDMX and 12 traumatology and orthopedics residents at Hospital Santa Fe, Bogota were evaluated. The students in CDMX reported an average qualitative stress of 28.50% during habitual practices, which decreased to an average of 14.67% after virtual reality practice. Residents in Bogotá experienced an average qualitative stress of 30.50% with their current learning methods but this reduced to an average of 13.92% after using virtual reality. These findings indicate that t

关键词： Virtual Reality Academic Stress learning Strategies Spine Surgery Training

The Phenols of the Genus <i>Agave</i>(Agavaceae)

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Journal of Biomaterials and Nanobiotechnology 2013年第3期4卷 9-16页

作者： Norma Almaraz-Abarca Eli Amanda Delgado-alvarado José Antonio ávila-Reyes José Natividad Uribe-Soto laura Silvia González-Valdez Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional Unidad Durango Instituto Politécnico Nacional Durango Dgo México

A review is presented about the studies that have been carried out on the phenolic composition of the species of the genus Agave in order to show which species of the genus has been analyzed, what is the potential of the species of Agave as source of phenolics with important biological activities, and what is the significance of the phenolic profiles as chemotaxonomic markers in the genus. The results of the analysis of a dozen of Agave species reveal an important richness of phenolic compounds, including flavonoids, homoisoflavonoids, and phenolic acids, and a broad diversity of biological activities associated to those compounds, as antioxidant, antibacterial, antifungal, antinematod, and immunomodulatory capabilities. The phenols of Agave also have a major potential as specific chemotaxonomic markers.

关键词： Genus Agave Phenol Profiles Homoisoflavanoids Biological Activity Chemotaxonomic Markers

Evaluation of Adverse Events Following Immunization against Rotavirus Regardless of Recommended Age Restriction

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Journal of Biosciences and Medicines 2017年第8期5卷 78-82页

作者： Jesus Reyna-Figueroa Irina Jeanette Bercholc-Urinowsky Gabriela Cardoso-Yah Ricardo Platón Vazquez-alvarado Dalila ramos-lópez Freya Helena Campos-Romero Cory Handelsman Ana Elena limón-Rojas Central South Hospital Mexican Oil Company Petróleos Mexicanos México City Mexico Robert Wood Johnson University Hospital New Jersey USA

Introduction: Mild and moderate Adverse Events Following Immunization (AEFI) against Rotavirus has not received much attention when the vaccine is administered regardless of recommended age restriction. Objectives: To describe the behavior of mild and moderate AEFI in immunized subjects against Rotavirus, in who age restriction period had not been considered. Methods: A case-control study in which we included immunized patients with monovalent oral vaccine against rotavirus and divided them into two groups: 1) Infants who received RV1 vaccine without considering the recommended period, and 2) Infants who were vaccinated with the recommended schedule. Results: From the total doses, 143/1894 (7.5%) were administered outside the restriction period. The most frequent AEFIs with the first dose were purpura, polypnea, and rhinorrhea;For the second dose: purpura, bloody stools, irritability and rhinorrhea. Conclusions: This study shows the benefits from vaccination regardless of age restriction are more beneficial compared to the possible risks of AEFI.

关键词： Rotavirus Vaccination Age Restriction Adverse Reaction

Synthesis and Characterization of Mesoporous Aluminosilicates for Copper Removal from Aqueous Medium

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Materials Sciences and Applications 2012年第7期3卷 485-491页

作者： David Alejandro de Haro-Del Río Alberto Florentino Aguilera-alvarado Irene Cano-Aguilera Merced Martínez-Rosales Stuart Holmes División de Ciencias Naturales y Exactas University of Guanajuato Guanajuato Mexico School of Chemical Engineering and Analytical Sciences University of Manchester Manchester UK. School of Chemical Engineering and Analytical Sciences University of Manchester Manchester UK

In this study the characterization of an aluminosilicate synthesized from commercial Al2(SO4)3 and colloidal SiO2 is presented, as well as its capacity for the removal of copper from aqueous solution. Characterization of the synthesized material was performed using X-ray diffraction, BET nitrogen adsorption-desorption, mass titration and the Boehm method. In order to obtain stable agglomeration and enhance its surface area (165 - 243 m2/g) and solid adsorbing capabilities, the molar ratio SiO2:Al2O3 (1:3, 1:1 and 3:1) was studied, the solubility of the preparation material, synthesis-procedure time and solution pH function were also examined. The maximum capacity to remove copper ions from an aqueous solution by synthesized aluminosilicate was 16 mg/g at pH 4 and 25℃. The langmuir model fitted better to the copper adsorption experimental data.

关键词： Mesoporous Aluminosilicates Surface Properties Copper Adsorption

Toll-like receptor 4 polymorphisms and bacterial infections in patients with cirrhosis and ascites

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World Journal of Hepatology 2018年第1期10卷 124-133页

作者： Edilmar alvarado-Tapias Carlos Guarner-Argente Elida Oblitas Elisabet Sánchez Silvia Vidal Eva Román Mar Concepción Maria Poca Cristina Gely Oana Pavel Juan Camilo Nieto Cándido Juárez Carlos Guarner Germán Soriano Department of Gastroenterology Hospital de la Santa Creu i Sant PauBarcelona 08025Spain Instituto de Salud Carlos III Institut de Recerca IIBSant PauUniversitat Autònoma de BarcelonaBellaterra(Cerdanyola del Vallès)08193Spain Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas(CIBERehd) Instituto de Salud Carlos IIIMadrid 28029Spain Department of Immunology Hospital de la Santa Creu i Sant PauBarcelona 08025Spain Escola Universitària d’Infermeria EUI-Sant Pau Hospital de la Santa Creu i Sant PauBarcelona 08025Spain

AIM To assess the relationship between the presence of toll-like receptor 4(TlR4) polymorphisms and bacterial infections in cirrhotic patients with ascites. METHODS We prospectively included consecutive patients with cirrhosis and ascites hospitalized during a 6-year period. Patients with human immunodeficiency virus(HIV) infection or any other immunodeficiency, patients with advanced hepatocellular carcinoma(beyond Milan's criteria) or any other condition determining poor short-term prognosis, and patients with a permanent urinary catheter were excluded. The presence of D299 G and/or T399 I TlR4 polymorphisms was determined by sequencing and related to the incidence and probability of bacterial infections, other complications of cirrhosis, hepatocellular carcinoma, and mortality during follow-up. A multivariate analysis to identify predictive variables of mortality in the whole series was performed. RESUlTS We included 258 patients: 28(10.8%) were carriers of D299G and/or T399I TlR4 polymorphisms(polymorphism group) and 230 patients were not(wildtype group). The probability of developing any bacterial infection at one-year follow-up was 78% in the polymorphism group and 69% in the wild-type group(P = 0.54). The one-year probability of presenting infections caused by gram-negative bacilli(51% vs 44%, P = 0.68), infections caused by gram-positive cocci(49% vs 40%, P = 0.53), and spontaneous bacterial peritonitis(29% vs 34%, respectively, P = 0.99) did not differ between the two groups. The oneyear probability of transplant-free survival was 55% in the polymorphism group and 66% in the wild-type group(P = 0.15). Multivariate analysis confirmed that age, Child-Pugh score, active alcohol intake, previous hepatic encephalopathy, hepatocellular carcinoma and serum creatinine were associated with a higher risk of death during follow-up. CONClUSION Genetic polymorphisms D299 G and/or T399 I of TlR4 do not seem to play a relevant role in the predisposition of cirrhotic patie

关键词： Cirrhosis Genetic polymorphisms Toll-like receptor 4 Bacterial infections Ascites

Damaging Agents and Tree’s Health Condition in an Urban Forest

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Open Journal of Forestry 2021年第3期11卷 238-253页

作者： luz de lourdes Saavedra-Romero Tomás Martínez-Trinidad Dionicio alvarado-Rosales Patricia Hernández-de la Rosa Jaime Villa-Castillo Postgrado en Fitosanidad-Fitopatología Colegio de Postgraduados Campus Montecillo Texcoco Estado de México Postgrado en Ciencias Forestales Colegio de Postgraduados Campus Montecillo Texcoco Estado de México Consultor Independiente Colegio de Postgraduados Campus Montecillo Texcoco Estado de México

Urban trees are subjected to different damaging agents throughout their lifetime. The aims of this study were to identify tree damaging agents, and to obtain a Damage Severity Index (DSI) in order to categorize tree health condition at San Juan de Aragon Park. Each tree was identified at species level in 28 randomly established plots in ten sections of the study area. Up to two types of damage were recorded per tree, based on the FIA (Forest Inventory an Analysis Program) protocol, and a DSI was obtained for each damaged tree considering location of damage, nature of the damaging agent and severity. A total of 753 trees were assessed and 12 species and 27 damaging agents were identified. Cankers, galls, the pepper tree psyllid and the red gum lerp psyllid were the most frequent damaging agents. Australian pine, red gum, Mediterranean cypress, Mexican white cedar, and California pepper were the most affected species. The DSI ranged from 3 to 17 and the average was 7.9. Sections J and H and the species California pepper, Australian pine, and Mexican white cedar presented the highest DSI. The tree population had a moderate health condition, while the aforementioned sections and tree species showed the poorest.

关键词： Damaging Agents Urban Trees Bleeding Cankers Galls Health Categories Damage Severity Index

New insights into the role of intra-tumor genetic heterogeneity in carcinogenesis: identification of complex single gene variance within tumors

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Journal of Cancer Metastasis and Treatment 2018年第1期4卷 428-441页

作者： Bruce Gottlieb Farbod Babrzadeh Kathleen Klein Oros Carlos alvarado Chunlin Wang Baback Gharizadeh Mark Basik Celia MTGreenwood lenore KBeitel Mark Trifiro lady Davis Institute for Medical Research Jewish General HospitalMontrealQC H3T 1E2Canada Segal Cancer Centre Jewish General HospitalMontrealQC H3T 1E2Canada Department of Human Genetics McGill UniversityMontrealQC H3A 0G4Canada Stanford Genome Technology Center Stanford UniversityPalo AltoCA 94304USA Department of Medicine McGill UniversityMontrealQC H3A 0G4Canada

Aim:Present cancer hypotheses are almost all based on the concept that accumulation of specific driver gene mutations cause *** discovery of intra-tumor genetic heterogeneity(ITGH),has resulted in this hypothesis being modified by assuming that most of these ITGH mutations are in passenger *** addition,accumulating ITGH data on driver gene mutations have revealed considerable genotype/phenotype *** study proposes to investigate this disconnect by examining the nature and degree of ITGH in breast ***:ITGH was examined in tumors using next generation sequencing of up to 68,000 reads and analysis tools that allowed for identification of distinct minority variants within single genes,i.e.,complex single gene variance(CSGV).Results:CSGV was identified in the androgen receptor genes in all breast tumors ***:Evidence of CSGV suggests that a selection-as opposed to a mutation-centric hypothesis could better explain *** hypothesis proposes that tumors develop by the selection of preexisting de novo mutations rather than just the accumulation of de novo ***,the role of selection pressures,such as changes in tissue microenvironments will likely be critical to our understanding of tumor resistance as well as the development of more effective treatment protocols.

关键词： Intra-tumor genetic heterogeneity breast cancer complex single gene variance

遗传学(育种)在未来家禽行业中起着很大的作用

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国外畜牧学（猪与禽） 2012年第5期32卷 28-29页

作者：谢金平 C.Z.alvarado

家禽健壮性的遗传选育是家禽行业未来5年的工作重点,同时营养、兽医保健和管理起着支撑作用。经济现状和未来食品农业问题是当今家禽行业从业者需面对或解决的热门课题。为解决这些课题,家禽科学协会日前在圣路易斯主办了一个研讨会,以... 详细信息

家禽健壮性的遗传选育是家禽行业未来5年的工作重点,同时营养、兽医保健和管理起着支撑作用。经济现状和未来食品农业问题是当今家禽行业从业者需面对或解决的热门课题。为解决这些课题,家禽科学协会日前在圣路易斯主办了一个研讨会,以此探讨家禽行业的未来发展。

关键词：家禽行业遗传学育种遗传选育支撑作用农业问题科学协会健壮性