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Search Results: 1 - 10 of 3538 matches for " Ruth Cueva "
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Study of Configural Reasoning and Written Discourse in Geometric Exercises of Proving  [PDF]
Ruth Cueva
Open Journal of Social Sciences (JSS) , 2016, DOI: 10.4236/jss.2016.42007
Abstract:

This article presents a study of configural reasoning and written discourse developed by students of the National Polytechnic School of Ecuador when performing geometrical exercises of proving.

Acid Tolerance of Lactobacillus acidophilus LA-K as Influenced by Various Pulsed Electric Field Conditions  [PDF]
Olga Cueva, Kayanush J. Aryana
Advances in Microbiology (AiM) , 2012, DOI: 10.4236/aim.2012.23044
Abstract: Pulsed electric field (PEF) processing involves the application of pulses of voltage for less than one second to fluid foods placed between two electrodes. Lactobacillus acidophilus is an important probiotic bacterium used for the production of fermented dairy products. Acid tolerance is an important probiotic characteristic. The influence of PEF on acid tolerance of Lactobacillus acidophilus is not known. Objective of this study was to elucidate the influence of certain PEF conditions on the acid tolerance of Lactobacillus acidophilus LA-K. Freshly thawed Lactobacillus acidophilus LA-K was suspended in sterile peptone 0.1% w/v distilled water and treated in a pilot plant PEF system. The treatments were pulse width (3, 6 and 9 μs), pulse period (10,000; 20,000 and 30,000 μs) and voltage (5, 15 and 25 kV/cm). Control was run through PEF system at 60 mL/min without receiving any pulsed electric field condition. Data were analyzed using the PROC GLM of the Statistical Analysis Systems (SAS). Differences of least square means were used to determine significant differences at P < 0.05. The control and the three different bipolar pulse widths studied were significantly different from each other. The acid tolerance of the control was significantly the highest, followed by the acid tolerance of the culture subjected to 3 μs and 6 μs. The acid tolerance of culture subjected to 9 μs was the lowest. The acid tolerance of the control was significantly the highest, followed by the acid tolerances subjected to the pulse period of 30,000 and 20,000 us. The acid tolerance of culture subjected to pulse period 10,000 μs was significantly the lowest. The acid tolerance of the control was significantly the highest followed by the acid tolerances of culture subjected to electric field strength of 5 and 15 kV/cm. The acid tolerance of culture subjected to 25 kV/cm was significantly the lowest. Acid tolerance of Lactobacillus acidophilus LA-K lowered by increasing pulse widths and voltages but lowering pulse periods.
Bile tolerance of Lactobacillus acidophilus LA-K as influenced by various pulsed electric field conditions  [PDF]
Olga Cueva, Kayanush J. Aryana
Advances in Bioscience and Biotechnology (ABB) , 2012, DOI: 10.4236/abb.2012.35080
Abstract: Lactobacillus acidophilus has several health benefits and is used as an adjunct bacterium in the manufacture of cultured dairy foods. Bile tolerance is an important probiotic characteristic. Pulsed electric field (PEF) processing is non-thermal, hurdle technology which comprises of passing fluid foods between two electrodes and subjecting them to pulses of voltage for less than one second. Whether certain mild PEF conditions can enhance bile tolerance of Lactobacillus acidophilus is not known. The objective was to study the influence of certain PEF conditions on the, bile tolerance of Lactobacillus acidophilus LA-K. Lactobacillus acidophilus LA-K suspended in sterile peptone 0.1% w/v distilled water was treated with pulse widths of 3, 6 and 9 μs, pulse periods of 10,000; 20,000 and 30,000 μs and electric field strengths of 5, 15 and 25 kV/cm. The control did not receive any pulsed electric field condition. Bile tolerance was determined hourly for 16 hours. PROC GLM of the Statistical Analysis Systems (SAS) was used for data analysis. Significant differences were determined at P < 0.05. Three replications were conducted. Bipolar pulse width effect had a significant (p < 0.0001) influence on the bile tolerance. Bile tolerance of the control was significantly higher than the bile tolerance subjected to any of the bipolar pulse widths studied. There were no significant differences among the three different bipolar pulse widths. Pulse period had a significant (p < 0.0001) influence on the bile tolerance. The control and the three different pulse periods studied were significantly different from each other. The bile tolerance of the control was significantly the highest, followed by the bile tolerances subjected to 30,000 μs and 20,000 μs respectively. The bile tolerance subjected to 10,000 μs was significantly the lowest. Electric field strength had a significant (p < 0.0001) influence on the bile tolerance. Bile tolerance of the control and bile tolerance of Lactobacillus acidophilus LA-K subjected to 5 kV/cm were signifycantly the highest while the bile tolerance when subjected to 25 kV/cm was significantly the lowest.
Violencia y adicciones: problemas de salud pública
Cueva,Gloria;
Revista Peruana de Medicina Experimental y Salud Pública , 2012, DOI: 10.1590/S1726-46342012000100015
Abstract: violence and addictions produce a great impact over persons, families, and communities. they impair their normal development and affect the possibility of individuals to fully grow. there are many different factors involved in their presentation, so proposed solutions must come from different sectors with an integrated point of view. the prospects of an adequate individual and collective development depend on the efficacy of the actions taken, from the public health point of view.
Violencia y adicciones: problemas de salud pública Violence and addictions: public health problems
Gloria Cueva
Revista Peruana de Medicina Experimental y Salud Pública , 2012,
Abstract: La violencia y las adicciones constituyen problemas de gran impacto en las personas, las familias y las comunidades, pues alteran el normal desenvolvimiento y la posibilidad de desarrollarse plenamente. En su presentación participan múltiples factores que obligan a que las alternativas de solución sean articuladas desde diferentes sectores y con una mirada integradora. Las perspectivas de un buen desarrollo individual y colectivo dependerán de la eficacia de las acciones que se tomen, desde la mirada de la Salud Pública. Violence and addictions produce a great impact over persons, families, and communities. They impair their normal development and affect the possibility of individuals to fully grow. There are many different factors involved in their presentation, so proposed solutions must come from different sectors with an integrated point of view. The prospects of an adequate individual and collective development depend on the efficacy of the actions taken, from the public health point of view.
Weak and strong forms of irresolute maps
Miguel Caldas Cueva
International Journal of Mathematics and Mathematical Sciences , 2000, DOI: 10.1155/s0161171200001502
Abstract: We consider new weak and stronger forms of irresolute and semi-closure via the concept sg-closed sets which we call ap-irresolute maps, ap-semi-closed maps and contra-irresolute and use it to obtain a characterization of semi-T1/2 spaces.
Estado de la cuestión sobre las características gramaticales de los marcadores discursivos del espa?ol
Cueva Lobelle,Alberto;
Forma y Función , 2008,
Abstract: this article focuses on a series of restrictive features of prosodic, morphological, syntactic and semantic nature that may be used to delimit the broad field of discourse markers in spanish. the analysis of these features, using divergent information from a variety of theoretical models, exposes the type of units that may be or may not be present within the units that are the object of study. once this problem is resolved, article focuses on this question: which is the category of discourse markers? two fundamental points of view are held: the conjunction as prototypical category of discourse markers and the discourse markers as a subset of the adverbial category.
Santa Anita: la finca, el feudo y el territorio en la nación imaginada por el personaje Fernando Vallejo
Cueva Lobelle,Alberto;
Folios , 2010,
Abstract: the farm of santa anita is an emblematic place constantly appearing in fernando vallejo's narrative. through the memory of the farm, we see a worldview, a way of seeing the world linked to the region within a literary writing which constitutes a highly contextualized social practice. in this sense, we consider the imagination as an act committed to reality and therefore we will appraise the ideological and political changes of human and social agencies that literary writing set in motion. therefore, we will analyze the text as a document in which the relationship with power is presented as a testimony of the existence of more or less opened relations of struggle and conflict.
Determinación de la calidad de la educación: buscando alternativas
La Cueva,Aurora;
Educere , 2007,
Abstract: in this paper, of a reflexive and purposeful nature, we establish the need to approach to determine the quality of pre-university education, while respecting its multifaceted and vital holistic experience characteristics. to this efect, we propose and justify three complementary paths: the first is based on the study of certain critical quantitative indicators, taken from the whole population sample, such as schooling indexes, grade repetition, desertion, teacher absence, books per student and cost per student, among others. a second path, using samples, proposes the use of surveys and interviews for those involved, to question them on aspects such as social and physical environment in the classroom and school, participation, teacher knowledge, pedagogical activities and satisfaction level with the school. a third option, also using samples, would use student production for the study. we reject determining quality through testing
Rawls y Kohlberg: una lectura en clave latinoamericana
Cueva Perus, Marco;
En-claves del pensamiento , 2011,
Abstract: we propose an approach to justice in latin america. with the backdrop of greed, injustice has resulted from two reasons: the acquisition of positions of exception, by individuals and groups, and the lack of social conventions that restrict these positions; both issues are addressed with the working theories of rawls and kohlberg.
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