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Search Results: 1 - 10 of 601116 matches for " Gabino García de los;Pe?a Lomelí "
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Calidad fisiológica, ácidos grasos y respiración en semillas de tomate de cáscara deterioradas artificialmente
Pichardo González, Juan M.;Ayala Garay, óscar J.;González Hernández, Víctor A.;Flores Ortiz, César M.;Carrillo Salazar, Alfredo;Pea Lomelí, Aureliano;Robledo Paz, Alejandrina;García de los Santos, Gabino;
Revista fitotecnia mexicana , 2010,
Abstract: during storage, seeds deteriorate due to mechanisms that reduce their germination rate, seedling growth rate and tolerance to adverse conditions. seed deterioration can be measured by means of artificial aging tests (aa). in this research the artificial deterioration of husk tomato seeds (physalis ixocarpa brot.) var. 'chf1-chapingo' was evaluated, and the germination rate was correlated with fatty acids content and respiratory activity. in a first experiment, seeds were artificially aged by applying 55, 65 and 75 % of relative humidity (rh) at 45 and 50 °c, for 30 d and germination rate (g, %), seed vigor (radical emergence rate, rer) and fatty acids content (quantified by means of a gas chromatograph connected to a mass spectrometer) were evaluated. in a second experiment, seeds were aged by imposing 50, 55, 60, 65, 70, 75 and 80 % of rh at 50 °c for 30 d; g, rer and respiration rate (measured after 72 h of imbibition) were measured as response variables. it was found that linoleic acid was the most abundant fatty acid (87-93 % of the total content) in these seeds, and the increase of heat and relative humidity caused a significant reduction (p ≤ 0.05) in g and ser without affecting fatty acids content. compared to untreated seeds (control), the combined effect of 50 °c and 65 % rh produced losses of 53 % in g and of 92 % in rer, in experiment 1. the same treatment (50 °c and 65 % rh) induced losses of 21 % in g and of 78 % in rer when compared to responses at 50 °c and 50 % rh. the respiratory rate correlated with the losses in g (r = 0.88) and rer (r = 0.99), thus indicating that loss of physiological quality in deteriorated seeds can be attributed to the reduction in respiratory activity.
Calidad fisiológica de semillas de Physalis ixocarpa en función de madurez a cosecha y condiciones de almacenamiento
Pérez Camacho, Ignacio;González Hernández, Víctor Arturo;Ayala Garay, óscar Javier;Carrillo Salazar, José Alfredo;Santos, Gabino García de los;Pea Lomelí, Aureliano;Cruz Crespo, Elia;
Revista mexicana de ciencias agrícolas , 2012,
Abstract: seed deterioration during storage reduces germination and seedling establishment in the field. for physalis ixocarpa brot. seeds the levels of environmental factors that affect its germination longevity and physiological performance during storage, depending on the state of development at harvest are unknown. for this research, variety chapingo seeds harvested at three stages of development were evaluated (45, 55 and 65 days after pollination), in three storage periods (0, 4 and 8 months) combined with five environments including two temperatures (23.8 and 5.3 °c) and two relative humidity levels (24 and 81 %). it was found that, the seeds can maintain its initial germination capacity (70%) for at least 8 months when stored under low relative humidity (24%) or cold (5 °c), since the combination of high relative humidity (81%) and temperature of 23 °c cause degradation in the seeds. the deterioration is manifested in reduced germination from 70 to 29%, viability from 81 to 46%, radicle rate of emergence from 20.4 to 9.9 radicles per day, rate of emergence of the aerial part from 6.3 to 2.3 seedlings per day, respiration from 16.1 to 6.6 nmol co2 g-1 s-1 and an increase in electrical conductivity from 32 to 97 μs cm-1 g-1. seeds of 55 days of age have already reached physiological maturity, since they germinate with the same vigor that the seeds of 65 days. immature seeds of 45 days do have ability to germinate, although 10% less than mature seed and with less vigor.
Consumo de medicamentos en ancianos
Pea,Ma. de los ángeles; Redondo García,Alina; Groning,Ernesto;
Revista Cubana de Medicina General Integral , 2003,
Abstract: a retrospective observational descriptive study was carried out in the health area of the people′s council luyanó, subordinated to "14 de junio" polyclinics, with the aim of characterizing the drug consumption in a sample of aged people. the study was made from november to december 1999 and from january to february 2000. one-hundred and thirty two older people were interviewed, which represented 89 % of the total amount of aged people taken care by 2 physician?s offices. the average age was 71,23 years. we found that 81 % of the older people took some drug (except vitamins) and the main reason of prescription was cardiovascular diseases and joint pains. the most used drugs were analgesics, anti-inflammatories, antipyretics, and mainly aspirin. forty-nine patients used vitamins and 21 resorted to traditional herb medicine. 40 % of prescriptions was made by the family doctor, 41 % by other specialists and 19 % represented self-medication practice. in general, few secondary effects were reported, mainly digestive malaises. the drug consumption was high in the studied sample, which mostly corresponds to the treatment of frequent diseases found in this age group.
Consumo de medicamentos en ancianos
Ma. de los ángeles Pea,Alina Redondo García,Ernesto Groning
Revista Cubana de Medicina General Integral , 2003,
Abstract: Se realizó una estudio observacional, descriptivo, retrospectivo, en un área de salud del Consejo Popular Luyanó, perteneciente al Policlínico "14 de junio"; para caracterizar el consumo de medicamentos en una muestra de ancianos. El estudio fue realizado durante los meses de noviembre y diciembre de 1999, y enero y febrero de 2000. Fueron entrevistados 132 ancianos que representan del 89 % del total de ancianos en 2 consultorios. El promedio de edad fue de 71,23 a os. Encontramos que el 81 % de los ancianos consumen algún fármaco (exceptuando vitaminas), y el motivo principal de prescripción son las afecciones cardiovasculares y los dolores articulares. La familia de fármacos más utilizada fue la de los analgésicos, los antiinflamatorios, los antipiréticos, y dentro de estos, la aspirina. Las vitaminas fueron utilizadas por 49 pacientes y la medicina verde por 21, el 40 % de las prescripciones fueron hechas por el Médico de Familia, el 41 % por otros especialistas y el 19 % correspondió a la automedicación. En general, fue reportada la incidencia de pocos efectos secundarios y sobresalieron los malestares digestivos. En la muestra estudiada el consumo de fármacos fue elevado y en muchos aspectos se corresponde con el tratamiento de las afecciones más frecuentes en este grupo etáreo. A retrospective observational descriptive study was carried out in the health area of the People′s Council Luyanó, subordinated to "14 de Junio" polyclinics, with the aim of characterizing the drug consumption in a sample of aged people. The study was made from November to December 1999 and from January to February 2000. One-hundred and thirty two older people were interviewed, which represented 89 % of the total amount of aged people taken care by 2 physician’s offices. The average age was 71,23 years. We found that 81 % of the older people took some drug (except vitamins) and the main reason of prescription was cardiovascular diseases and joint pains. The most used drugs were analgesics, anti-inflammatories, antipyretics, and mainly aspirin. Forty-nine patients used vitamins and 21 resorted to traditional herb medicine. 40 % of prescriptions was made by the family doctor, 41 % by other specialists and 19 % represented self-medication practice. In general, few secondary effects were reported, mainly digestive malaises. The drug consumption was high in the studied sample, which mostly corresponds to the treatment of frequent diseases found in this age group.
Calidad de semilla en colectas de chile de agua (Capsicum annuum L.) de los Valles Centrales de Oaxaca, México
Carrillo, Erik Pablo;Mejía Contreras, José Apolinar;Carballo Carballo, Aquiles;García de los Santos, Gabino;Aguilar Rincón, Víctor Heber;Corona Torres, Tarsicio;
Agricultura técnica en México , 2009,
Abstract: the crop of "chile de agua" in the central valley of oaxaca is economically important due to its generalized consumption in this region. the seed to establish this crop is obtained through the traditional method, for this reason the physical and physiological quality standards of those seeds is unknown. the aim of this research was to determine the physical and physiological quality in the seed of 14 landraces of "chile de agua" produced in three environments. the 14 landraces were sown at san sebastián abasolo, tlacolula, oaxaca during the 2004 spring-summer and fall-winter cycles under field condition and at montecillo, mexico under greenhouse conditions. the experimental design was a randomized complete block with four replications. from the three environments five ripened fruits from each of five plants per plot were taken for seed evaluation. the physical quality of the seed was evaluated through the weight of 1000 seeds and volumetric weight, whereas the physiological quality by means of standard germination and after accelerated aging, seedling and root length and dry weight. in a principal component analysis the first two components explained 98.36% of the total variation; the variables important in the first component were weight of 1 000 seeds, volumetric weight and seedling length, for the second component were germination with and without accelerated aging. a cluster analysis formed four groups of landraces; landraces from san sebastián abasolo and santiaguito showed high physical and physiological seed quality reflected in a higher percentage of germination and favorable response to accelerated aging and greater volumetric and one thousand seeds weight, as well as greater accumulation of dry matter in the three environments.
El visitante del Parque Nacional Nevado de Toluca, México. Análisis del comportamiento en un área natural protegida
Osorio García, Maribel;Maass, Sergio Franco;Ramírez de la O, Irma Luz;Nava Bernal, Gabino;Novo Espinosa de los Monteros, Gerardo;Regil, Héctor Hugo;
Investigaciones geográficas , 2011,
Abstract: this paper presents the results of research conducted on visitors to the national park nevado de toluca (pnnt), which is located in the central region of mexico. the study is innovative because it takes up the demographic and psychographic variables of tourism market analysis in order to identify the visitor profiles in this natural area. thus, a statistical and cartographic analysis was carried out through a stratified survey which involved crossing variables and the calculation of standard deviations for some of them. finally the results are compared from the findings of the limited literature produced around nature tourism visitor.
Análisis dialélico para caracteres de vigor de semilla y de plántula en genotipos de maíz tropical
Cervantes Ortiz, Francisco;García de los Santos, Gabino;Carballo-Carballo, Aquiles;Bergvinson, David;Crossa, José Luis;Mendoza-Elos, Mariano;Moreno-Martínez, Ernesto;
Agricultura técnica en México , 2006,
Abstract: with the aim of evaluating the genetic effects of seed and seedling vigor characters in tropical corn, a diallel cross design was used involving six inbred lines of tropical corn previously characterized as three possessing high and three low seed vigor. the seed was produced at tlaltizapan, morelos, mexico, in the summer of 2004 and evaluated at the postgraduate college, montecillo, state of mexico in the autumn of the same year. in seeds, the percentage of germination was determined after seed vigor was analyzed using the accelerated aging test, the electric conductivity test and weight. in the seedlings the percentage of emergency, speed of emergency, shoot dry matter, plant height, number of leaves, emergency index, index of rate of emergency, and vigor, were evaluated. the general combining ability (acg) effects for seed characters and initial seedling vigor, were significant (p<0.01) and higher than those of the specific combining ability (ace), except in seed vigor. the maternal and reciprocal effects were significant (p<0.01) for all evaluated traits indicating the influence of the female parent used for the production of the evaluated seed. the progenitors cml 396, cml 254 and cml 307 showed the highest acg in seed and seedling characters. in the estimation of variances it was found that those of the dominance effects were more important than the additives in all characters. seedling characters had higher h2 than seed characters, indicating that the selection would be more effective if made on seedlings.
Calidad fisiológica y da?o físico en semilla de maíz sometida a impacto
Mancera Rico, Arturo;García de los Santos, Gabino;Carballo Carballo, Aquiles;Villase?or Perea, Carlos Alberto;Martínez Garza, ángel;Estrada Trejo, Victoria;
Agricultura técnica en México , 2007,
Abstract: damage caused by physic impacts diminishes the physical and physiological quality of corn seeds. the object of this study was to evaluate the damage caused by an impact and an accelerated ageing test on the physical and physiological quality of corn seeds. the experiment was performed in the seed analysis laboratory at the colegio de postgraduados, montecillo, state of mexico, mexico in 2005. seed samples from the apical, middle and basal portion of the cob were collected with 10 and 23% of moisture content. the seeds were placed on a table with the embryo upward and impacted by the free falling of an iron 243 g cylinder equivalent to 0.000, 0.141, 0.188 and 0.235 j; subsequently, half of the seeds were subjected to an accelerated ageing test. the highest physical and physiological quality was observed in seeds with 23 % of moisture content and from the middle and basal positions of the cob. in seeds impacted at 23 and 10% of moisture content, the percentages observed without visible damage were 34 and 25, standard germination percentages 80 and 69, germination after accelerated ageing test was 74 and 40% and the electrolyte loss (electrical conductivity per gram of seed) were 23 and 53 (μscm-1, respectively. in seeds from the apical, middle and basal portion, the percentages of seeds without visible damage were 25, 31 and 31%, standard germination 62, 82 and 81%, germination after accelerated ageing test 3 0, 74 and 80% and electrolyte loss 54, 25 and 23 (μscm-1, respectively. the percentages of seed damaged and the reduction of physiological quality were proportional to the impact applied, except for germination rate.
Algunas aplicaciones clínicas del zinc y su acción sobre el sistema inmune
de la Guardia Pea,Odalis; Ustáriz García,Catalino; García García,María de los ángeles; Morera Barrios,Luz;
Revista Cubana de Hematolog?-a, Inmunolog?-a y Hemoterapia , 2011,
Abstract: zinc is a chemical element located in group 12 of the periodic table; it is classified as a transition metal. from the biological point of view, it is a constituent of more than 300 metalloproteins and more than 2 000 transcription factors. its participation in metabolism encompasses a wide variety of reactions, both synthesis and degradation of almost all biomolecules. the recommended daily intake is estimated to be between 10 and 20 mg. it is very abundant in red meat, seafood, germ of cereal and milk. it is found in virtually all cells, although 90 % of total body zinc is contained in skeletal muscle and bone. it highlights the lack of reserves and their levels are under tight homeostatic control. due to its immune modulatory function, it has been clinically used in pediatric acute respiratory infections and immune system recovery of malnourished children. it has been used in acute diarrheal disease as a stabilizer of intestinal epithelium and membranes, as well as lipid peroxidation protector. another of its actions is to improve healing, so it has been used in lower limb ulcers associated with venous disease and diabetic foot, which is combined its healing effect with its stimulating cellular immunity. some skin disorders such as common warts have been treated with zinc. no papers directly relating zinc with immune compromised patient were found.
Algunas aplicaciones clínicas del zinc y su acción sobre el sistema inmune Some clinical applications of zinc and its effect on the immune system
Odalis de la Guardia Pea,Catalino Ustáriz García,María de los ángeles García García,Luz Morera Barrios
Revista Cubana de Hematolog?-a, Inmunolog?-a y Hemoterapia , 2011,
Abstract: El zinc es un elemento químico situado en el grupo 12 de la tabla periódica; es un metal clasificado como de transición. Desde el punto de vista biológico es un constituyente de más de 300 metaloproteínas y de más de 2 000 factores de transcripción. Su participación en el metabolismo abarca una amplia variedad de reacciones, tanto de síntesis como de degradación de casi todas las biomoléculas. La ingesta diaria recomendada está calculada entre 10 y 20 mg. Es muy abundante en las carnes rojas, mariscos, germen de los cereales y leche. Se encuentra prácticamente en la totalidad de las células, aunque el 90 % del zinc total del organismo está contenido en el músculo esquelético y los huesos. Se destaca la inexistencia de reservas y sus niveles están bajo estricto control homeostático. Por su función inmunomoduladora ha sido utilizado clínicamente en las infecciones respiratorias agudas pediátricas y en la recuperación del sistema inmune de los ni os desnutridos. Se ha empleado en las enfermedades diarreicas agudas como estabilizador del epitelio intestinal y las membranas, así como protector de la peroxidación lipídica. Otra de sus acciones es mejorar la cicatrización, por lo que ha sido utilizado en las úlceras de miembros inferiores, asociadas con enfermedad venosa y en el pie diabético, donde se combina su efecto cicatrizante con el de estimulador de la inmunidad celular. Algunos desórdenes cutáneos como las verrugas vulgares, han sido tratados con zinc. No se han encontrado trabajos que relacionen al zinc directamente con el paciente inmunodeficiente. Zinc is a chemical element located in group 12 of the periodic table; it is classified as a transition metal. From the biological point of view, it is a constituent of more than 300 metalloproteins and more than 2 000 transcription factors. Its participation in metabolism encompasses a wide variety of reactions, both synthesis and degradation of almost all biomolecules. The recommended daily intake is estimated to be between 10 and 20 mg. It is very abundant in red meat, seafood, germ of cereal and milk. It is found in virtually all cells, although 90 % of total body zinc is contained in skeletal muscle and bone. It highlights the lack of reserves and their levels are under tight homeostatic control. Due to its immune modulatory function, it has been clinically used in pediatric acute respiratory infections and immune system recovery of malnourished children. It has been used in acute diarrheal disease as a stabilizer of intestinal epithelium and membranes, as well as lipid peroxidation protector. Another
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