Author: RICARDO LOPEZ GUTIERREZ

Esta vez, el agua nos llegó hasta el cuello ...

RICARDO LOPEZ GUTIERREZ (2005)

Ecoteca

Te interesaría saber quién visita anualmente la costa de Baja California, específicamente la laguna Ojo de liebre. Si quieres saber de quién se trata escucha está cápsula

Article

CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA Recursos Mar

Ya no más dolores de cabeza e inflamación del cerebro...

RICARDO LOPEZ GUTIERREZ (2005)

Trayectos

Since 2001, Plesiomonas shigelloides belongs to the family Enterobacteriaceae, is a Gram-negative, facultative anaerobic, motile because of lophotrichous flagella, non-sporeforming bacilli. P. shigelloides colonies are positive reactions for oxidase, catalase, indol, inositol, and glucose. Is an aquatic microorganism which has been isolated from fresh water such as rivers, streams, ponds, lakes; estuarine water and sea water. The species name shigelloides was justified by its biochemical and antigenic resemblance with Shigella sonnei. Growth rates with respect to temperature on P. shigelloides are: the maximums ranged from 40 to 55 ºC with optimum growth temperatures ranging from 25 to 35 ºC and has a minimal growth temperature of about 8 to 10 °C

Article

MEDICINA Y CIENCIAS DE LA SALUD Cerebro -- Anatomía Inflamación

El Mundo de las Ballenas Mexicanas

Alejandra Alvarado Zink RICARDO LOPEZ GUTIERREZ (2003)

Estancias

La guía de ballenas, es una recopilación de once especies y ocho de ellas habitan en las aguas mexicanas

Article

BIOLOGÍA Y QUÍMICA Ballenas Mamíferos

Tratamiento de agua residual doméstica mediante un reactor rafa y una celda microbiana de combustible

Cindy Yajaira Martínez Santacruz David Herrera López Rubén Fernando Gutiérrez Hernández Ricardo Bello Mendoza (2016)

Resumen en español: "Se evaluó el desempeño de un sistema compuesto por un reactor anaerobio de flujo ascendente (RAFA) y una celda microbiana de combustible (CMC) en el tratamiento de agua residual de baja carga, así como la recuperación de energía de este sistema. El reactor RAFA (1 L) se alimentó de manera continua con agua residual doméstica bajo tiempos de retención hidráulica (TRH) de 12 y 6 h. La CMC (250 mL) fue operada por lotes y alimentada con agua residual cruda (TRH = 12 h) o con el efluente del reactor RAFA (TRH = 6 h). Se encontró que la remoción de materia orgánica en el sistema acoplado RAFA-CMC (88 % en demanda química de oxígeno (DQO), 75 % de carbono orgánico total (COT) y 79 % de sólidos suspendidos totales (SST)) fue superior a los niveles observados en el reactor RAFA (76 % DQO, 66 % COT y 73 % SST) y en la CMC (60 % DQO, 53 % COT y 40 % SST) cuando estos fueron operados de manera individual. La mayor densidad de potencia obtenida con la CMC fue de 176 mW/m2, utilizando una resistencia de 1000 Ω, en tanto que la eficiencia coulómbica fue de 8 %. El sistema RAFA-CMC demostró ser una buena alternativa para el tratamiento de agua residual y la generación simultánea de electricidad aún bajo condiciones de limitación de sustrato, es decir, con baja concentración de materia orgánica en el influente. "

Resumen en inglés: "The performance of a system consisting of an up-flow anaerobic sludge blanket (UASB) reactor and a microbial fuel cell (MFC) for the treatment of low-strength wastewater and the recovery of energy was evaluated. The UASB reactor (1 L) was continuously fed with raw domestic wastewater under hydraulic retention times (HRT) of 12 and 6 h. The MFC (250 mL) was operated in batch mode and fed with either raw wastewater (HRT = 12 h) or the effluent from the UASB reactor (HRT = 6 h). It was found that the removal of organic matter by the coupled UASB–MFC system (88 % chemical oxygen demand (COD), 75 % total organic carbon (TOC) and 79 % total suspended solids (TSS)) was higher than the levels obtained by the UASB reactor (76 % COD, 66 % TOC and 73 % TSS) and the MFC (60 % COD, 53 % TOC and 40 % TSS) when these were operated individually. The highest power density obtained in the MFC was 176 mW/m2 with 1000 Ω resistance, whereas the coulombic efficiency was 8 %. The UASB-MFC system proved to be a good alternative for the treatment of wastewater and the simultaneous generation of electricity even under substrate limiting conditions, such as low concentration of organic matter in the influent. "

Article

Tratamiento de aguas residuales domésticas;Digestión anaerobia;Remoción de materia orgánica Treatment of domestic wastewater;Anaerobic digestion;Organic matter removal INGENIERÍA Y TECNOLOGÍA CIENCIAS TECNOLÓGICAS CIENCIAS TECNOLÓGICAS

Robust H∞ control of glycemia in Type 2 Diabetes Mellitus via continous insulin plus Metformin

NELIDA ELIZABETH LOPEZ PALAU CLAUDIA PATRICIA FLORES GUTIERREZ Alejandro Ricardo Femat Flores (2018)

"Several studies have shown that an adequate therapy for glycemic control in patients with type 2 diabetes mellitus (T2DM) can delay or prevent complications derived from this condition. To achieve the control objectives an adequate therapy should be performed by using insulin alone or in combination with an oral hypoglycemic agent. However, the key point of glycemic control is to determine the amount of insulin to be delivered. In order to achieve the above different strategies have been proposed, one of them is the design of feedback control algorithms. In this article a robust feedback control algorithm of glycemia in T2DM was designed. The algorithm determines the continuous insulin infusion to be delivered to maintain normoglycemia considering a combined therapy with a dose of metformin. The problem approach was to find a controller that minimized in the sense of the H? norm: i) the difference between the glycemia of a T2DM patient and a healthy subject (tracking problem) and ii) the effect of disturbances due to glucose intake and noise from a glucose sensor."

Article

Robust control Dynamic modelling Closed-loop Control Biomedical systems Pharmacokinetic-Pharmacodynamic modelling CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA MATEMÁTICAS MATEMÁTICAS

Potato Plants

Induction by salicylic acid of in vitro thermotolerance during thermotherapy

HUMBERTO ANTONIO LOPEZ DELGADO MIGUEL AGUILAR CAMACHO RICARDO MARTINEZ GUTIERREZ MARTHA ELENA MORA HERRERA GLORIA ROGEL MILLAN (2015)

Capitulo de investigación cientifica

Virus are an important problem in plants, since they can generate important economic lost in many crops. Production of virus-free plants is a requirement in seed production schemes. This chapter demonstrates the potential effect of salicylic acid on getting virus-free plants. Thermotherapy followed by meristem isolation and culture is the usual method for eradication of virus. Thermotherapy can be done in vitro or in pots. The thermotherapy treatment depends on the virus present in the plants and the sensitivity of the cultivar to heat. Often plants do not tolerate the high temperatures for periods long enough to inactivate the virus. Enhanced thermotholerance effect of salicylic acid is demonstrated for getting PVX-free plants in Solanum tuberosum and TSWV, TAVfree plants in Dendranthema grandiflora Tzvelev. Short and long terms effects of SA were tested in microplants infected. Survival after thermotherapy, recovery period and virus-free microplants were assessed. Both short and long term SA treatments showed a significant survival during thermotherapy. The number of virus-free microplants was also increased by SA treatments in contrast with control. SA was able to improve the survival and the virus-free microplantas. The induction of thermotolerance by salicylic acid is associated with active oxygen species.

INIFAP

Book part

Salicylic Acid In Vitro BIOLOGÍA Y QUÍMICA