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Search Results: 1 - 10 of 6270 matches for " Pacheco-Aguilar "
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Efecto de la concentración de quitosano y ph sobre la remoción de sólidos en agua de cola de la industria sardinera
Pacheco-Aguilar,Ramón; Leyva-Soto,Pedro; Carvallo-Ruiz,Gisela; García-Carre?o,Luis F; Márquez-Ríos,Enrique;
Interciencia , 2009,
Abstract: the stickwater is a complex effluent consisting of a variety of solids, most of which should be removed to produce a new effluent that can be directly poured into the sea. in this study, stickwater was centrifuged to remove solids and the resulting liquid was then treated with chitosan at different concentrations and ph to eliminate the solids left in it. centrifugation extracted 33.88% of total solids, 28.52% protein, 97.50% fat, 40% ash and 20% npn. it also decreased in 42.2 and 63.3% the bod5 and cod, respectively. transmittance percent increased from 14.6 to 18.4, a small change in relation to the content of solids removed. the addition of chitosan to centrifuged stickwater decreased 25% of the total solids content, 55% of protein, 40% fat, 24% ash and 60% npn. likewise, the addition of chitosan decreased the bod5 and cod in 48.4 and 31.2%, respectively. as a consequence, transmittance increased from 18.4 to 86.0%, indicating that such increase was mainly due to the elimination of pigments rather than organic matter. a significant decrease was achieved in bod5 and cod; nevertheless, other tools are required to reduce these figures to the levels established by the environmental health regulations.
Arquitectura y anatomía foliar del complejo Polypodium plesiosorum sensu Moran (Polypodiaceae)
Tejero-Díez,J. Daniel; Aguilar-Rodríguez,Silvia; Terrazas,Teresa; Pacheco,Leticia;
Revista de Biología Tropical , 2010,
Abstract: architecture and leaf anatomy of the polypodium plesiosorum sensu moran complex (polypodiaceae). the polypodium plesisorum complex is a heterogeneous morphology group. we studied leaf architecture and anatomy of 12 species of this group, in addition to other 23 species of polypodium (p. dulce, p. polypodioides and p. vulgare complex sensu moran) and related genera (goniophlebium, phlebodium, pleopeltis, serpocaulon, synammia), for comparative purposes. two homogeneous groups of species were established in p. plesiosorum complex. one of them is recognized based on the type of anastomosis of the veins (type iii): polypodium conterminans (originally considered in the group of p. dulce with free venation by moran), p. hispidulum, p. plesiosorum and p. rhodopleuron. the second group with polypodium arcanum, p. castaneum, p. colpodes, p. eatonii, and p. flagellare were recognized based on the type of anastomosis of the veins (type iv) and how vascular strands fuse along the petiole-leaf rachis. characters studied helped to group the remaining species with other groups outside the complex under study. rev. biol. trop. 58 (3): 955-976. epub 2010 september 01.
Arquitectura y anatomía foliar del complejo Polypodium plesiosorum sensu Moran (Polypodiaceae)
J. Daniel Tejero-Díez,Silvia Aguilar-Rodríguez,Teresa Terrazas,Leticia Pacheco
Revista de Biología Tropical , 2010,
Abstract: El complejo Polypodium plesisorum es un grupo de morfología heterogénea. Se estudió la arquitectura y anatomía foliar de 12 especies que constituyen el complejo de Polypodium plesiosorum reconocidas por Moran, y otras 23 especies de Polypodium (complejos P. dulce, P. polypodioides y P. vulgare sunsu Moran) y géneros relacionados taxonómicamente (Goniophlebium, Phlebodium, Pleopeltis, Serpocaulon, Synammia) con fines comparativos. Dos grupos de especies homogéneas fueron establecidos en el complejo P. plesisorum. Uno de ellos se reconoce por el tipo de anastomosis de las venas (tipo III): Polypodium conterminans (originalmente considerado en el grupo de P. dulce de venación libre según Moran), P. hispidulum, P. plesiosorum y P. rhodopleuron. El segundo grupo formado por Polypodium arcanum, P. castaneum, P. colpodes, P. eatonii y P. flagellare, se reconoce por el tipo de anastomosis de las venas (tipo IV) y la forma en que se fusionan los cordones vasculares a lo largo del eje pecíoloraquis de la hoja. Los caracteres estudiados ayudaron a relacionar las especies restantes con otros grupos fuera del complejo estudiado. Architecture and leaf anatomy of the Polypodium plesiosorum sensu Moran complex (Polypodiaceae). The Polypodium plesisorum complex is a heterogeneous morphology group. We studied leaf architecture and anatomy of 12 species of this group, in addition to other 23 species of Polypodium (P. dulce, P. polypodioides and P. vulgare complex sensu Moran) and related genera (Goniophlebium, Phlebodium, Pleopeltis, Serpocaulon, Synammia), for comparative purposes. Two homogeneous groups of species were established in P. plesiosorum complex. One of them is recognized based on the type of anastomosis of the veins (Type III): Polypodium conterminans (originally considered in the group of P. dulce with free venation by Moran), P. hispidulum, P. plesiosorum and P. rhodopleuron. The second group with Polypodium arcanum, P. castaneum, P. colpodes, P. eatonii, and P. flagellare were recognized based on the type of anastomosis of the veins (Type IV) and how vascular strands fuse along the petiole-leaf rachis. Characters studied helped to group the remaining species with other groups outside the complex under study. Rev. Biol. Trop. 58 (3): 955-976. Epub 2010 September 01.
Comparability Assessments of Process Changes Made during Development of Anti-Idiotype Vaccine  [PDF]
Kathya de la Luz-Hernández, Yamilé Rabasa, Raquel Montesinos, Dasha Fuentes, Julio Felipe Santo Tomás, Orlando Morales, Yadira Aguilar, Blanca Pacheco, Adolfo Castillo, Ana Maria Vazquez
World Journal of Vaccines (WJV) , 2014, DOI: 10.4236/wjv.2014.41005
Racotumomab monoclonal antibody is a murine anti-idiotypic antibody. This monoclonal antibody mimics N-glycolyl-GM3 gangliosides has been tested in several clinical trials Phase I/II for breast, melanoma and non-small cell lung cancer patients as an anti-idiotypic cancer vaccine. The early production process was performed in vivo from mice ascites fluid. This process was transferred to bioreactor-based method at pilot scale followed to the scale-up of the fermentation. In this work we present a comprehensive molecular characterization of racotumomab MAb produced by the two different production scales in order to determine the impact of the manufacturing process in vaccine performance. We observed differences in glycosylation pattern and charge heterogeneity between racotumomab produced in both scales. Interestingly, these modifications had no significant impact on biological activity elicited in chickens. So, changes in primary structure like glycosylation, charge heterogeneity and oxidation did not affect biological activity of the vaccine.
Landscape Transformation in Tropical Latin America: Assessing Trends and Policy Implications for REDD+
Pablo Pacheco,Mariel Aguilar-St?en,Jan B?rner,Andres Etter,Louis Putzel,Maria del Carmen Vera Diaz
Forests , 2011, DOI: 10.3390/f2010001
Abstract: Important transformations are underway in tropical landscapes in Latin America with implications for economic development and climate change. Landscape transformation is driven not only by national policies and markets, but also by global market dynamics associated with an increased role for transnational traders and investors. National and global trends affect a disparate number of social, political and economic interactions taking place at the local level, which ultimately shapes land-use and socio-economic change. This paper reviews five different trajectories of landscape change in tropical Latin America, and discusses their implications for development and conservation: (1) Market-driven growth of agribusiness; (2) expansion and modernization of traditional cattle ranching; (3) slow growth of peasant agriculture; (4)?logging in production forest frontiers; and (5) resurgence of agro-extractive economies. Contrasting trade-offs between economic development and forest conservation emerge across these landscapes, calling for nuanced policy responses to manage them in the context of climate change. This discussion sets the background to assess how reduction of emissions from deforestation and forest degradation and enhancing carbon stocks (REDD+) aims should be better aligned with current landscape trajectories and associated actors to better address climate-change mitigation in forest landscapes with effective and equitable outcomes.
Lesión de la médula espinal: actualización bibliográfica: fisiopatología y tratamiento inicial
Ballesteros Plaza, Vicente;Marré Pacheco, Bartolomé;Martínez Aguilar, Celmira;Fleiderman Valenzuela, José;Zamorano Pérez, Juan José;
Coluna/Columna , 2012, DOI: 10.1590/S1808-18512012000100014
Abstract: the pathophysiology of spinal cord injury (sci) is complex and still not fully elucidated. primary and secondary processes determine sci. the initial injury is produced by the transmission of the mechanical energy of the trauma to the spinal cord and neural structures. the secondary injury acts on those structures that were spared by the initial trauma, affecting microvascular perfusion and ionic concentrations, inducing the liberation of free radicals and neurotransmitters and activating lipid peroxidation, thus producing cellular death. recent research in the treatment of sci is focused on the development of timely therapeutic interventions that could attenuate the effects of these secondary pathophysiological mechanisms. among the pharmacological interventions, methyl-prednisolone, gangliosides and antagonists of opiod, glutamate receptor and ionic channels have been used, advocating their theoretical protective effect in the neurological prognosis of patients with sci. nevertheless, none of these interventions has yet significantly modified this prognosis.
Análisis térmico de semilla de maíz con plaga por microscopía fotopiroeléctrica
Dominguez-Pacheco, A.;Hernández Aguilar, C.;Zepeda Bautista, R.;Martínez Ortiz, E.;Cruz-Orea, A.;
Superficies y vacío , 2012,
Abstract: photothermal techniques have been used to characterize the thermal and optical parameters of different homogeneous materials. among these techniques the photopyroelectric and photoacoustic microscopy have been applied for obtaining superficial and in-depth thermal images of several materials with the possibility to obtain sub-superficial characteristics by changing the modulation frequency of the incident light on the sample under study. in the present research the thermal image of a non-homogeneous material such as a biological object, in this case a maize seed was obtained by photopyroelectric microscopy. the differences in the seed structural components were observed through its thermal image obtained from the photopyroelectric signal when the modulated light is scanned on the pyroelectric sensor, which is in good thermal contact with the sample. a scale of colors is used to represent the different values of the photopyroelectric signal, as a function of the scan coordinates, which allows observing better the seed components. the differences of photopyroelectric signal are caused by the inhomogeneities in the optical and thermal properties of the material which locally constituting the sample. in the case of this study the sample was an infected seed with "palomilla" (ostrinia nubilalis) plague and the thermal image shows the damage at the interior of the maize seed due to this plague.
Eficacia de dos tipos de recolecta para registrar la diversidad de melolóntidos nocturnos (Coleoptera: Scarabaeoidea)
María de Jesús Méndez Aguilar,Adriana E. Castro Ramìrez,Ricardo Alvarado Barrantes,Cutberto Pacheco Flores
Acta zoológica mexicana , 2005,
Abstract: Tradicionalmente se ha asumido que los melolóntidos nocturnos son atraídos por las luces, por lo que se ha registrado su diversidad a través de capturas por medio de fuentes luminosas, sin embargo, en recientes trabajos se ha demostrado que no todas las especies responden a ello. Con el propósito de identificar un método de recolecta de estos escarabajos más eficaz para registrar su diversidad, durante los meses de abril a junio de 2001y 2002 se capturaron escarabajos en alumbrados públicos y en plantas hospederas, buscándolos con lámparas manuales, en tres parcelas agrícolas de San Cristóbal Las Casas, Chiapas. Los datos se analizaron por tipo de recolecta dentro de cada sitio (área agrícola por a o) y de forma conjunta entre sitios y tipos de recolecta. La composición de especies por tipo de recolecta se analizó con la prueba Kruskal-Wallis. Se obtuvieron índices de Shannon-Winner y Bootstrap, y corrieron pruebas de Wilcoxon, Mann-Whitney y procedimiento de Hutcheson; además de una regresión logística para analizar el efecto del tipo de captura en la relación de hembras y machos. Se obtuvieron 11,091 ejemplares de 20 especies y siete morfoespecies, pertenecientes a 11 géneros. Las especies más abundantes fueron Phyllophaga obsoleta (51.6%), P. tumulosa (25%) y Anomala sticticoptera (10.4%)...
Arturo Domu00EDnguez Pacheco,Claudia Hernu00E1ndez Aguilar,Alfredo Cruz Orea,Aquiles Carballo Carballo
Revista fitotecnia mexicana , 2010,
Abstract: La energía electromagnética actúa sobre la materia e interrelaciona con los organismos biológicos, en cada etapa de desarrollo desde la germinación, y por ello puede ser una técnica de bajo costo para mejorar la calidad de semilla. En esta investigación se evaluó el efecto de la irradiación electromagnética sobre la calidad fisiológica de la semilla de maíz (Zea mays L.), del híbrido experi-mental 'CL-11 x CL-12', con un campo electromagnético de baja frecuencia. Se compararon 12 tratamientos de campos magnéticos, con intensidades de 160 y 560 mT y siete tiempos de exposición (t) de 0, 30, 60, 120, 240, 360 y 480 min, en un dise o experimental de bloques completos al azar con cuatro repeticiones. Hubo diferencias estadísticas significativas en la velocidad de emergencia y porcentaje de establecimiento de plántulas al cuarto día, y al día 17 en el peso seco. Se detectó bioestimulación positiva con exposición de 30 y 60 min a una intensidad de 560 y 160 mT (dosis de 705.6 y 27.42 K J m-3 s-1, respectivamente). Con la dosis de 705.6 K J m-3 s-1 hubo un incremento significativo de 69.2 % en comparación con el testigo en velocidad de emergencia, de 90.5 % en establecimiento de plántulas y de 36.6 % en peso seco.
Quality of life associated with treatment adherence in patients with type 2 diabetes: a cross-sectional study
Yolanda V Martínez, Carlos A Prado-Aguilar, Ramón A Rascón-Pacheco, José J Valdivia-Martínez
BMC Health Services Research , 2008, DOI: 10.1186/1472-6963-8-164
Abstract: A cross-sectional comparative study on a random sample of 238 type 2 diabetic patients was carried out over one year in four family medicine units of the Mexican Institute of Social Security (IMSS) in Aguascalientes, Mexico. Treatment adherence was measured using the indirect method of pill count to assess adherence behaviour, obtaining information at two home visits. In the first we recorded the medicine prescribed and in the second, we counted the medicine remaining to determine the proportion of the medicine taken. We also assessed two adherence behaviour precursors: the patients' knowledge regarding their medical prescription measured through a structured questionnaire; and attitudes to treatment adherence using a Likert scale. Quality of life was measured through the WHOQOL-100 (the WHO Quality of Life questionnaire). Information concerning both knowledge and attitude was obtained through interviews with the patients. A multiple linear regression model was constructed to establish the relationship between each quality of life domain and the variables related to adherence, controlling for covariates.There was no association between quality of life and treatment adherence behaviour. However, the combination of strong knowledge and a positive attitude was associated with five of the six quality of life domains.The results suggest that it is important to explore psychological precursors of treatment adherence behaviour in type 2 diabetic patients. Indeed, we consider that it will be useful to carry out interventions that change negative attitudes towards treatment adherence and that promote medical prescription knowledge, which may help to improve the quality of life of such patients.When patients with diabetes do not adhere to their drug prescriptions the efficacy of the medication declines [1], as does their control of glycaemia. Accordingly, there is a higher risk of acute and chronic complications [2,3], leading to unnecessary hospital admissions [4]. A systema
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