Browsing by Author "Rivera, Antonio"

Now showing 1 - 6 of 6
  • Artículo
    4 Modelo de biorremediación de plomo con lirio acuático Modelo de biorremediación de plomo con lirio acuático Vol 5 No 17
    (2020-03) Castañeda Antonio, María Dolores; Barrera, Antonio Miguel; Santamaría Juárez, Juana Deysi; Munive Hernández, Antonio; Rivera, Antonio; Ramos Cassellis, María Elena; Castañeda Antonio, María Dolores; 0000-0003-0350-3802; Santamaría Juárez, Juana Deysi; 0000-0003-0935-5468; Rivera, Antonio; 0000-0002-2727-4584; Ramos Cassellis, María Elena; 0000-0003-4922-848X
    "El jacinto de agua (Eichhornia crassipes) es una de las plantas con mejor reproducción y adaptabilidad a ambientes contaminados, los estudios han demostrado que el lirio de agua es un colector de metales pesados en el agua; aprovechando su rápido crecimiento y facilidad de recolección. Objetivo: Evaluar la eliminación de plomo (Pb) utilizando el lirio de agua como bioacumulador en un proceso de biorremediación".
  • Artículo
    Actividad antimicrobiana del aceite de naranja residual
    (2018-09) Castañeda Antonio, María Dolores; Rivera, Antonio; Choy Flores, Esther; Munguía Pérez, Ricardo; Portillo Reyes, Roberto; Muñoz Rojas, Jesús; Castañeda Antonio, María Dolores; 0000-0003-0350-3802; Munguía Pérez, Ricardo; 0000-0002-9131-0092; Muñoz Rojas, Jesús; 0000-0002-1151-9778
    "Antimicrobial activity evaluation of residual orange oil. The residue of the orange peel is a common contaminant in Mexico, even though it can be used in the cosmetic, pharmaceutical and food areas. We extract orange oil from residual skin, and determine its chemical compounds and antimicrobial activity. We used Soxhlet distillation, liquid-liquid extraction and pressing extraction, and gas chromatography coupled to mass spectrometry (GC-MS). We used a modified Kirby & Bauer technique on Acremonium sp., Alternaria sp., Aspergillus niger, Candida albicans, Pseudomonas aeruginosa ATCC27853, Staphylococcus aureus ATCC 25923, Trichoderma sp. and Verticillium sp. The Soxhlet method was the most efficient (2,065%). We observed inhibition values of 75% to 100% for S. aureus and P. auroginosa; 75 to 100% for Candida albicans; and 50 to 74% for Pseudomonas auroginosa. It acted as fungistatic for all strains. The CG-MS profile was: D-limonene 85,93%, β-myrcene 2,23%, linalool 1,72%, decanal 0,63%, α-pinene 0,43% and sabinene 0,20% per μL of oil per Head-space and per direct injection (main components: alkanes, and perilic alcohol, D-limonene and linalool)".
  • Artículo
    Assessment of biological and persistent organic compounds in Hospital Wastewater After Advanced Oxidation Process UV/H2O2/O3
    (2020-02) Castañeda Antonio, María Dolores; Mejía Morales, Claudia; Hernández, Fernando; Cortés Hernández, Diego M.; Rivera, Antonio; Bonilla, Noemí; Castañeda Antonio, María Dolores; 0000-0003-0350-3802; Mejía Morales, Claudia; 0000-0003-2640-5703
    "This work studies the reduction of biological and organic compounds in hospital wastewaters (HWW) by advanced oxidation process (AOP). The HWW samples were previously treated with an extended aeration process and, thereafter, a post-treatment with AOP based on UV/H2O2/O3 system with a medium pressure mercury lamp was applied. After using the AOP system, the water samples were characterized using chemical oxygen demand (COD), turbidity, color test, coliforms and E. coli test, gas chromatography coupled to mass spectrometry (GC-MS), and UV-Visible absorption spectra. The results showed that 73% of organic compounds were removed in 20 min and the HWW sample was sterilized; nevertheless, 10 persistent organic compounds and 8 by-products formed after AOP UV/H2O2/O3 were observed, some of them are toxic compounds. In this sense, current HWW treatment plants cannot eliminate all contaminants in HWW; therefore, it is necessary to improve current processes by techniques as AOP and create standards to control biological and organic compounds in HWW in Mexico".
  • Artículo
    Bioactive constituents in ethanolic extract leaves and fruit juice of Morinda citrifolia
    (2012-03) Castañeda Antonio, María Dolores; Cedillo Ramírez, María Lilia; Rivera, Antonio; Hernández, Fernando; Castillo, V.; Sánchez, A.; Castañeda Antonio, María Dolores; 0000-0003-0350-3802
    "Plants and fruits are considered as one of the main sources of biologically active compounds, and several studies reported that medicinal plants are used by 80% of the people living in rural areas as primary healthcare system. Morinda citrifolia has been heavily promoted for a wide range of uses, including antibacterial, antiinflamatory, analgesic, antioxidant, and antitumor effects. The objective was to identify chemical constituents in leaves extract and fruit juice of Morinda citrifolia by GC-MS analysis. The bioactive constituents in ethanolic extract leave and fruit juice of Morinda citrifolia were investigated using Gas Chromatography-Mass Spectrometry GC-MS analysis. Bioactive constituents studies of ethanolic extract leaves and fruit juice of M. citrifolia by GC-MS analysis clearly showed the presence of eighteen and fifteen compounds, respectively. Among the identified compounds of medical importance were detected (octanoic acid, cyclopropyl, hexanoic acid, n-decanoic acid, allantoin, sorbitol, mannitol, glycerin and gamma-tocopherol)".
  • Artículo
    Caracterización fisicoquímica de material particulado del Popocatépetl, trayecto Atlixco-Puebla, y su impacto en la salud y el ambiente
    (2022-08-17) Castañeda Antonio, María Dolores; Santamaría Juárez, Juana Deisy; Linares Ruíz, Viridiana; Ramírez Guzmán, Martha Elva; Juárez Meneses, Mayté; Velasco H, Ángeles; Águila Almanza, Eva; Munguía P, Ricardo; Rivera, Antonio; Báez R, Antonino; Castañeda Antonio, María Dolores; 0000-0003-0350-3802; Santamaría Juárez, Juana Deisy; 0000-0003-0935-5468; Ramírez Guzmán, Martha Elva; 0000-0002-8840-3706; Juárez Meneses, Mayté; 0000-0002-0658-169X; Águila Almanza, Eva; 0000-0002-5182-6465; Rivera, Antonio; 0000-0002-2727-4584
    "El estudio determinó la presencia de material particulado (MP) emitido por el volcán Popocatépetl los días 29 y 31 de marzo de 2019 en el trayecto Atlixco-Puebla. El objetivo fue identificar tamaño y naturaleza química del MP en esta zona y reconocer el impacto en la salud (por inhalación) y el ambiente, así como comparar las cenizas de los años 1994, 2012 y 2019. El MP suspendido se cuantificó con un contador DT-9880, los metales totales y lixiviados se calcularon por espectrofotometría de absorción atómica (EAA) y la caracterización de cenizas se realizó por difracción de rayos X (DRX), espectroscopia de infrarrojo (FTIR-ATR) y espectroscopia de energía dispersiva (EDS)/microscopia electrónica de barrido (SEM). El 99.9% del MP presentó de 0.3 a 2.5 micrómetros (µm) de metales totales: cromo (8.5 ppm), cobre (0.61 ppm), magnesio (99.9 ppm) y zinc (39 ppm). La lixiviación fue desde 0.05% a 2.5% de metales totales. Se encontraron diferencias morfológicas significativas en la porosidad y tamaño de partícula de las cenizas. Monitorear el MP en esta área permite proponer medidas de atenuación por afectaciones a la salud y ambientales".
  • Artículo
    Photochemical treatment of residual water, determination of genotoxic effect and bacterial inactivation load
    (2016-02) Castañeda Antonio, María Dolores; García, Sandra; Hernández, Fernando; Rivera, Antonio; Cedillo, Lilia; Chávez, Sayra; Castañeda Antonio, María Dolores; 0000-0003-0350-3802
    "A photochemical UV/H2O2/O3 (PCT) system was used for the depuration of pretreated wastewater with advanced primary treatment (APT); genotoxic effect was determined over the water aliquots before and after the application of the photochemical system. As a toxicity indicator, garlic bulbs (Allium sativum), were used; the inhibition average of the roots and the chromosomal aberration frequency over the radical meristem cells were determinate, some morpho-anatomical alterations were registered".