Coronavirus disease 2019(COVID-19)is a disease produced by severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)and it is currently causing a catastrophic pandemic affecting humans worldwide.This disease has bee...Coronavirus disease 2019(COVID-19)is a disease produced by severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)and it is currently causing a catastrophic pandemic affecting humans worldwide.This disease has been lethal for approximately 3.12 million people around the world since January 2020.Globally,among the most affected countries,Mexico ranks third in deaths after the United States of America and Brazil.Although the high number of deceased people might also be explained by social aspects and lifestyle customs in Mexico,there is a relationship between this high proportion of deaths and comorbidities such as high blood pressure(HBP),type 2 diabetes,obesity,and metabolic syndrome.The official epidemiological figures reported by the Mexican government have indicated that 18.4%of the population suffers from HBP,close to 10.3%of adults suffer from type 2 diabetes,and approximately 36.1%of the population suffers from obesity.Disbalances in the gut microbiota(GM)have been associated with these diseases and with COVID-19 severity,presumably due to inflammatory dysfunction.Recent data about the association between GM dysbiosis and metabolic diseases could suggest that the high levels of susceptibility to SARSCoV-2 infection and COVID-19 morbidity in the Mexican population are primarily due to the prevalence of type 2 diabetes,obesity,and metabolic syndrome.展开更多
Rivers and aquifers are increasingly affected worldwide by the action of agro-industrial pollution. Facing this challenge, nanoparticles have found a wide range of applications in the decontamination and remediation o...Rivers and aquifers are increasingly affected worldwide by the action of agro-industrial pollution. Facing this challenge, nanoparticles have found a wide range of applications in the decontamination and remediation of water, given the characteristics which make them highly reactive to specific substances. One of the simplest ways of gaining access to these particles is through their synthesis over a sufficiently rigid matrix of manageable size. This report describes the synthesis and characterization of nanoparticles of iron and potassium diphosphate (KFeP2O7) synthesized on silica gel beads (SiO2). Analysis by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) have been applied in order to determine the mineral phases and morphology of the synthesized compounds. Complementary tests were conducted so as to determine surface characteristics such as specific area by the BET method and point of zero charge (pHpzc) by mass titration. The acid-base titration enabled to determine the adsorptive nature of nanoparticles and their response to a pH range from 1 to 12.展开更多
基金by Secretaría de Relaciones Exteriores México(SRE),No.SRE/027/2021Agencia Mexicana de Cooperación Internacional para el Desarrollo(AMEXCID),No.AMEXCID 2020-5+2 种基金CONACyT for Doctoral Fellowships,No.777953(KC-C),No.635676(TB-G),No.291236(FH-Q),and No.336296(LEV-F)CONACyT for Master Fellowships,No.997494(NGZ-T),and No.997152(JMV-I)Fellows from the Sistema Nacional de Investigadores,Mexico,No.43142(PZ-S),No.225525(FB-G),No.47399(CP-C),and No.19815(JGM).
文摘Coronavirus disease 2019(COVID-19)is a disease produced by severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)and it is currently causing a catastrophic pandemic affecting humans worldwide.This disease has been lethal for approximately 3.12 million people around the world since January 2020.Globally,among the most affected countries,Mexico ranks third in deaths after the United States of America and Brazil.Although the high number of deceased people might also be explained by social aspects and lifestyle customs in Mexico,there is a relationship between this high proportion of deaths and comorbidities such as high blood pressure(HBP),type 2 diabetes,obesity,and metabolic syndrome.The official epidemiological figures reported by the Mexican government have indicated that 18.4%of the population suffers from HBP,close to 10.3%of adults suffer from type 2 diabetes,and approximately 36.1%of the population suffers from obesity.Disbalances in the gut microbiota(GM)have been associated with these diseases and with COVID-19 severity,presumably due to inflammatory dysfunction.Recent data about the association between GM dysbiosis and metabolic diseases could suggest that the high levels of susceptibility to SARSCoV-2 infection and COVID-19 morbidity in the Mexican population are primarily due to the prevalence of type 2 diabetes,obesity,and metabolic syndrome.
基金This study was conducted as part of the project CB 907 of ININ.
文摘Rivers and aquifers are increasingly affected worldwide by the action of agro-industrial pollution. Facing this challenge, nanoparticles have found a wide range of applications in the decontamination and remediation of water, given the characteristics which make them highly reactive to specific substances. One of the simplest ways of gaining access to these particles is through their synthesis over a sufficiently rigid matrix of manageable size. This report describes the synthesis and characterization of nanoparticles of iron and potassium diphosphate (KFeP2O7) synthesized on silica gel beads (SiO2). Analysis by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) have been applied in order to determine the mineral phases and morphology of the synthesized compounds. Complementary tests were conducted so as to determine surface characteristics such as specific area by the BET method and point of zero charge (pHpzc) by mass titration. The acid-base titration enabled to determine the adsorptive nature of nanoparticles and their response to a pH range from 1 to 12.
