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Search Results: 1 - 10 of 206546 matches for " Alarcón-Cruz "
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Exploración y caracterización morfológica de poblaciones de la jamaica (Hibiscus sabdariffa L.) del estado de Guerrero, México Morphological exploration and characterization of roselle (Hibiscus sabdariffa L.) populations from state of Guerrero, Mexico
Noé Alarcón-Cruz,Rafael Ariza Flores,Aristeo Barrios Ayala,David H. Noriega Cantú
Revista mexicana de ciencias agrícolas , 2012,
Abstract: El presente estudio se realizó en las instalaciones de la Universidad Autónoma Chapingo durante el periodo de 2007 a 2009 y tuvo como objetivo caracterizar morfológicamente a 47 colectas de jamaica (Hibiscus sabdariffa L.) que representaron a poblaciones del estado de Guerrero. En la caracterización morfológica se evaluaron 50 variables, mismas que se separaron en 40 cuantitativas y 10 cualitativas. De las cuantitativas se seleccionaron 25 variables y de las cualitativas cinco con alta significancia. En la caracterización de datos morfológicos se utilizaron correlaciones, análisis de correspondencia y de agrupamiento. Los caracteres morfológicos cuantitativos que más aportaron a la diferenciación de los genotipos de jamaica fueron: longitud en la base del lóbulo principal de la hoja, longitud promedio del fruto, perímetro promedio del fruto, longitud vertical de la hoja, ángulo del lóbulo izquierdo de la hoja, croma (C) de la flor y promedio de color de hoja cuantificado con colorímetro (L). Los caracteres cualitativos que mejor ayudaron a definir los grupos de jamaicas fueron el color visual de la hoja, precocidad, color aparente del tallo, color de brácteas y ausencia o presencia de glándulas melíferas que contribuyeron de manera substancial en la separación de los grupos. During 2007 to 2009 period this study was performed. Taking place at facilities of Universidad Autonoma Chapingo, the aim was to morphologically characterize 47 collections of roselle (Hibiscus sabdariffa L.) that represented populations from the state of Guerrero. In morphological characterization 50 variables were assessed, which were divided into 40 quantitative and 10 qualitative variables. 25 were selected from the quantitative ones and five with high importance from the qualitative. For morphological data characterization correlations, correspondence and grouping analysis were used. The quantitative morphological characters that most contributed to differentiation of roselle genotypes were: width at the base of leaf's main lobule, average length of fruit, average fruit perimeter, leaf's vertical length, leaf's left lobule angle, flower's chroma (C) and average leaf's color quantified by colorimeter (L). The qualitative characters that best helped to define roselle groups were leaf's visual color, earliness, stem's apparent color, bracts color and lack or presence of glands, which substantially contributed to segregate the groups.
Exploración y caracterización morfológica de poblaciones de la jamaica (Hibiscus sabdariffa L.) del estado de Guerrero, México
Alarcón-Cruz, Noé;Ariza Flores, Rafael;Barrios Ayala, Aristeo;Noriega Cantú, David H.;Legaria Solano, Juan Porfirio;
Revista mexicana de ciencias agrícolas , 2012,
Abstract: during 2007 to 2009 period this study was performed. taking place at facilities of universidad autonoma chapingo, the aim was to morphologically characterize 47 collections of roselle (hibiscus sabdariffa l.) that represented populations from the state of guerrero. in morphological characterization 50 variables were assessed, which were divided into 40 quantitative and 10 qualitative variables. 25 were selected from the quantitative ones and five with high importance from the qualitative. for morphological data characterization correlations, correspondence and grouping analysis were used. the quantitative morphological characters that most contributed to differentiation of roselle genotypes were: width at the base of leaf's main lobule, average length of fruit, average fruit perimeter, leaf's vertical length, leaf's left lobule angle, flower's chroma (c) and average leaf's color quantified by colorimeter (l). the qualitative characters that best helped to define roselle groups were leaf's visual color, earliness, stem's apparent color, bracts color and lack or presence of glands, which substantially contributed to segregate the groups.
Corrosion Behavior of Titanium and Nickel-based Alloys in HCl and HCl + H2S Environments
J. Mendoza-Canales and J. Marín-Cruz
International Journal of Electrochemical Science , 2008,
Abstract: Titanium grade 2 (UNS R50400), alloy 400 (UNS N04400), alloy 20 (UNS N08020) and alloy C-276 (UNS N10276) were electrochemically explored to determine their corrosion susceptibility behavior when exposed to environments typically found on existent atmospheric column overhead systems in mexican crude oil refineries. Linear anodic polarization was used to attain electrochemical results. Main corrosive species –present in actual overhead systems for a characteristic heavy crude oil produced in Mexico- were reproduced by performing experiments in two distinct electrolytes (0.05 mol/L HCl and 0.05 mol/L HCl + 500 ppm H2S in aqueous solution) at 40 °C. Metals were examined at pH 1.5, 4, 6, 8 and 10 values for both electrolytes to identify effects of key contaminants. Results revealed that each explored metal exhibits particular corrosion susceptibility depending on pH of environment, suggesting that corrosion susceptibility of every metal is a function of particular metal-environment conditions.
Atypical Variations of Water Conductivity Prior to Tectonic Earthquakes  [PDF]
Fidel Martínez-García, Arturo Colín-Cruz, Salvador Adame-Martínez, Jorge J. Ramírez-García
International Journal of Geosciences (IJG) , 2015, DOI: 10.4236/ijg.2015.612108
Abstract: Within the framework of precursor events related to earthquakes, this paper analyzes the possible effect on the aquatic environment of the surrounding energy that accompanies earthquakes, particularly in the area where oceanic and continental plates collide (Cocos Plate and North American Plate, south of Mexico). As a preamble, the types of precursor events, characteristics, and their possible origin are described. A project was designed under the assumption that in areas with high frequency and intensity seismicity there is an electrical and electromagnetic potential promoter which is detectable and assessable indirectly by measuring water conductivity behavior, which also may have atypical variations of data; the outcome of intensive conductivity monitoring in different settings, natural as well as manmade (wellsprings, artesian well and a cistern), are presented herein. The results of the conductivity monitoring for seven months, highlight two patterns in data behavior: one pattern shows the subtle dependence of data behavior on the geographic location of data monitoring instruments, revealing that could have a slight relationship between areas with increased seismic frequency and intensity and the presence of atypical conductivity variations. Another pattern reveals the possible relationship between atypical variations in conductivity and subsequent earthquake events; a total of 241 seismic events were analyzed and 59 of them are provided as evidence related with patterns mentioned.
Intrinsic Motives of Autonomy, Self-Efficacy, and Satisfaction Associated with Two Instances of Sustainable Behavior: Frugality and Equity  [PDF]
Víctor Corral-Verdugo, Daniel González-Lomelí, Marisol Rascón-Cruz, Víctor O. Corral-Frías
Psychology (PSYCH) , 2016, DOI: 10.4236/psych.2016.75068
Abstract:

This paper explores the relationship between sustainable behavior, indicated by frugal and equitable actions, and three intrinsic motives: satisfaction, autonomy and self-efficacy. One-hundred and seventy-three undergraduates at a Mexican university responded to a questionnaire investigating their sustainable actions and the intrinsic repercussions derived from those actions. Using structural equations, a model is specified and tested, which reveals the presence of a higher-order factor (sustainable behavior) subjacent to a high and significant covariance between frugal and equitable behaviors. The resulting higher-order-factor, in turn, significantly predicts the report of feelings of satisfaction, autonomy, and self-efficacy. These findings are in line with the idea that sustainable behavior is to a good extent self-determined through the operation of intrinsic consequences, which instigate people’s pro-social and pro-environmental actions.

Producción de ácido giberélico a partir de Gibberella fujikuroi utilizando lodo residual municipal como sustrato
Cuali-álvarez,Irene; Pavón-Romero,Sergio H.; Colín-Cruz,Arturo;
Universitas Scientiarum , 2011,
Abstract: objective. to use municipal sewage sludge (lrm) from a wastewater treatment plant located in toluca, state of mexico, to grow the fungus gibberella fujikuroi in submerged fermentation and to produce gibberellic acid (ag3). materials and methods. we used gibberella fujikuroi (cdbb: 268). to obtain ag3, production was verified using as a substrate the standard culture medium (mce). gibberellic acid determination was done with high performance liquid chromatography (hplc) with a varian 9050.9012 equipment. we obtained 6 samples of sludge from a wastewater treatment plant in toluca, state of mexico, that were then characterized. finally, both substrates (lrm and mce) were used in submerged fermentation, and ga3 was obtained by extraction and quantified using hplc. results. the lrm characterization showed that the organic matter content (mo) is of 5.20% (w/v) and the total nitrogen content (nt) is of 0.25% (w/v). such composition is within the range as a substrate for the production of ag3 by gibberella fujikuroi. the fungus was cultivated for 3, 8, 13 and 30 days in sterile sewage sludge with a moisture content of 95.6% (w/v) and in standard culture medium (mce). samples were processed and analyzed by high performance liquid chromatography (hplc). production of ag3 in the lrm was of 460.06 mg/l after 30 days in submerged fermentation at ph 4.0, and of 1,014.46 mg/l in the control. conclusion. the nutrient content of lrm is suitable for the growth of the fungus gibberella fujikuroi and for the production of ga3 when used as a substrate.
Estudio clínico y genético de tres casos de anemia de células falciformes
Josefina Salomón-Cruz,Luis Gómez-Valencia,Anastasia Morales-Hernández
Salud en Tabasco , 2006,
Abstract: En la anemia de células falciforme o drepanocitosis los eritrocitos contienen una hemoglobina (HBS) anormal, debido a lo cual los eritrocitos al dejar libre el oxigeno adquieren la forma de hoz o de media luna. El patrón de herencia de esta enfermedad es autosómica recesiva. En este trabajo se presentan tres casos de tres hermanos quienes tienen anemia drepanocítica, la evaluación citogenética de sangre periférica en ellos resultó un cariotipo normal, pero por las características clínicas, y la presentación de los casos en el árbol genealógico corroboran la herencia autosómica recesiva.
Assessment of Beauveria bassiana and Their Enzymatic Extracts against Metamasius spinolae and Cyclocephala lunulata in Laboratory  [PDF]
Lluvia Sánchez-Pérez, Silvia Rodríguez-Navarro, Victor Hugo Marín-Cruz, Miguel ángel Ramos-López, Alejandro Palma Ramos, Juan Esteban Barranco-Florido
Advances in Enzyme Research (AER) , 2016, DOI: 10.4236/aer.2016.43010
Abstract: The application of enzymatic extracts and conidia of Beauveria bassiana in Metamasius spinolae and Cyclocephala lunulata was evaluated. The variables were mortality and time of death. In M. spinolae, mortality with extracts 29%, conidia 27% and the combination of both 31%, all had a time of death of four days. Although with different symptoms, used enzymatic extracts: contraction and softening of the joints; by conidia: mycelium in the joints; in the combination of conidia and enzymatic extracts: abundant aerial mycelium. In C. lunulata, 100% mortality in all treatments; Time of death: enzymatic extracts and extracts with conidia 1.2 days; conidia 2.8 days. Symptoms were different, enzymatic extracts: melanization and internal tissue lysis; enzymatic extract and conidia: mycelium emerged and melanization; conidia: mycelium emerged. Enzymatic extracts showed insecticidal activity in M. spinolae and C. lunulata. These results suggest the potential of enzymatic extracts as biocontrol agents to improve the use of entomopathogenic fungi.
La eficiencia y el misreporting contable en las ONGD espa olas. Análisis de proyectos de cooperación internacional para el desarrollo
Natalia Martín-Cruz,Víctor Martín-Pérez,César Gámez-Alcalde
Academia : Revista Latinoamericana de Administración , 2012,
Abstract: El objetivo de este trabajo es valorar el comportamiento contable denominado misreporting de las organizaciones no gubernamentales para el desarrollo (ONGD) y evaluar sus consecuencias sobre la eficiencia en la ejecución de proyectos. En concreto, se selecciona una muestra de 52 proyectos financiados por la Agencia Espa ola de Cooperación Internacional para el Desarrollo (Aecid), se compara la imputación de las partidas de gasto realizadas por las ONGD a las partidas contables proporcionadas por la Aecid con las que se correspondería utilizando la clasificación del Plan General de Contabilidad Pública para valorar el misreporting, y se calcula la eficiencia de cada proyecto utilizando la metodología del análisis envolvente de datos (DEA, por sus siglas en inglés). Los resultados obtenidos muestran que la práctica de misreporting es habitual dentro del subsector de la cooperación al desarrollo y que contribuye a mejorar los niveles de eficiencia con los que se ejecutan los proyectos de cooperación internacional para el desarrollo.
Tratamiento de aguas residuales por un sistema piloto de humedales artificiales: evaluación de la remoción de la carga orgánica
ROMERO-AGUILAR, Mariana;COLíN-CRUZ, Arturo;SáNCHEZ-SALINAS, Enrique;ORTIZ-HERNáNDEZ, Ma. Laura;
Revista internacional de contaminación ambiental , 2009,
Abstract: wastewater treatment is a priority at the global level, because it is important to have enough water of good quality, which will allow an improvement of environment, health and life quality. in mexico, because of insufficient infrastructure, high costs, lack of maintenance and qualified staff, only 36 % of the generated wastewaters are treated, which generates the need for developing alternative technologies for their depuration. artificial wetlands are an alternative due their high efficiency for removal of polluting agents and their low installation and maintenance costs. this paper evaluates the removal percentage of the organic charge of wastewaters in a treatment system of artificial wetlands of horizontal flux, with two vegetal species. the system was designed with three modules installed in a sequential way. at the first one, organisms of the species phragmites australis (cav.) trin. ex steudel were integrated; at the second, organisms of the species typha dominguensis (pers.) steudel, and at the third, both species. the experimental modules were installed at the effluent of a primary treatment, which contains municipal wastewater coming from a research building. the following parameters were analyzed in the water: chemical oxygen demand (cod), ions of nitrogen (no3-, n-no2- y n-nh4+) and total phosphorus. additionally, the total count of bacteria associated to the system was evaluated. results showed that the system is an option for the removal of organic matter and nutrients, of low operation and maintenance costs.
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