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1
artículo
Se determinaron las condiciones óptimas para maximizar el porcentaje de remoción de los metales pesados como iones Pb2+ y Zn2+ de soluciones binarias acuosas mediante el uso de una zeolita químicamente modificada llamado NeoniteMR. De la caracterización por DRX, FRX, FTIR y adsorción-desorción de N2, se establece que el NeoniteMR está compuesto principalmente por la zeolita natural clinoptilolita, teniendo SiO2, Na2O, SO3 y Al2O3 como los componentes principales; la relación Si/Al fue de 3,8 y los principales cationes intercambiables son Na+, Ca2+ y K+, el área de superficie BET fue de 24,31 m2/g. El diseño Box Behnken para cuatro factores, [Pb2+], [Zn2+], dosis de Neonite y pH a tres niveles, fue usado para construir modelos cuadráticos de segundo orden, los que presentaron un coeficiente de determinación R2 ajustado de 0.8680 y 0.9614 para el porcentaje remoción de Pb2+ y ...
2
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A fin de determinar la actividad multifuncional de los residuos calcáreos de la concha de abanico, se realizaron los siguientes ensayos, calcinación de los residuos calcáreos a temperatura y tiempo controlados. El polvo activado de la calcinación fue caracterizado por FRX y DRX, los resultados mostraron un óxido de calcio de alta cristalinidad y pureza. Pero al mismo tiempo, este óxido de calcio activado al hidrolizarse en el agua para conformar Hidróxido de calcio mostró actividad funcional en deodorizar, coagular y remover bacterias en muestras reales de agua dulce superficial. Palabras Clave: Residuos de concha de abanico, deodorización, coagulación, antibacterial. Citas: Arboleda, V. J. (2000). Teoría y práctica de la purificación de agua (3° edición). Bogotá, McGraw-Hill. ASTM D1292 – 10. Standard Test Method for Odor in Water. Recuperado de https://astm.nufu.eu/st...
3
tesis de grado
La localidad de Túcume, presenta gran variedad de edificaciones de barro, este tipo de construcciones con adobe y quincha no son solo parte de nuestra cultura, sino que representan el legado de nuestros antepasados, actualmente estos sistemas están desapareciendo, debido a pseudos conceptos, sociales y económicos, que desestiman su uso, además el poco conocimiento del trabajo con estos materiales y la poca propagación de los beneficios del mismo. Mediante esto se establece como objetivo identificar el adecuado funcionamiento de los sistemas constructivos de tierra, a través del mapeo de las viviendas, sus características arquitectónicas y los elementos que conforman el sistema constructivo. La metodología usada tiene un enfoque mixto, donde se utilizan herramientas de redibujo, fotografías, fichas de observación, además de entrevistas. Mediante este contexto la localidad de T...
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OBJETIVE: To compare the effect of abdominal hysterectomy type on female sexual function. MATERIALS AND METHODS: prospective descriptive study, according to the design 'only after', held at the Regional Hospital of Trujillo, Peru, in which 54 women undergoing total abdominal hysterectomy (HAT) and 54 women who underwent subtotal hysterectomy (HAST ) for benign disease between January 2001 and December 2003; They were randomly selected to answer a questionnaire that evaluates their sexual function (FSFI). The proportions of dysfunction scores each of the domains of sexual function were determined, as well. Comparisons were made using the chi-square test, z-test of proportions and the test 't'. RESULTS: The proportion of sexual dysfunction in patients undergoing high as (40.7%) was lower than in those undergoing HAT (48.1%), with no statistically significant difference (p> 0.05), and there...
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OBJETIVE: To compare the effect of abdominal hysterectomy type on female sexual function. MATERIALS AND METHODS: prospective descriptive study, according to the design 'only after', held at the Regional Hospital of Trujillo, Peru, in which 54 women undergoing total abdominal hysterectomy (HAT) and 54 women who underwent subtotal hysterectomy (HAST ) for benign disease between January 2001 and December 2003; They were randomly selected to answer a questionnaire that evaluates their sexual function (FSFI). The proportions of dysfunction scores each of the domains of sexual function were determined, as well. Comparisons were made using the chi-square test, z-test of proportions and the test 't'. RESULTS: The proportion of sexual dysfunction in patients undergoing high as (40.7%) was lower than in those undergoing HAT (48.1%), with no statistically significant difference (p> 0.05), and th...
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Objectives: a) To verify the number of studies on executive functions (EF) in older adults carried out in Ibero-America; b) To identify the instruments used to measure EF in older adults during the years 2009-2018. Material and methods: A bibliometric study on EF in older adults in Latin America was carried out through the Scopus and Scielo databases. Studies published in Spanish and Portuguese languages using eight keywords and five registered indicators. Results: Between 2009 and 2018, a total of 12 original investigations have been carried out in six Iberoamerican countries (Spain, Argentina, Chile, Colombia, Cuba, and Peru). Most EF-related investigations were reported duing the 2010-2009 and 2013-2014 periods. Several instruments were used, the Trail Making Test and the Frontal Assessment Battery being the most frequent. Conclusions: There seems to be a limited interest in investiga...
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Background: Maca, Lepidium meyenii walp, is a plant that grows in Peruvian Andes’ highlands. It is used as food because of its nutritional value and its ethnical and medical properties related to fertility and vitality. Currently public interest has increased on food and dietetic supplements that contain active principles like polyphenol compounds with inhibitory effect on acetylcholinesterase and butyrylcholinesterase activities, thus improving cognitive functions through mechanisms yet unknown; for this reason maca has been proposed as an adaptogen that increases energy and resistance and diminishes stress. Objectives: To determine the energetic effect of yellow maca on memory and learning by biochemical tests, in an animal model of weaning rats. Design: Experimental study. Setting: Biochemistry and Nutrition Research Center, Faculty of Medicine, Universidad Nacional Mayor de San Mar...
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Se presenta una solución numérica para el análisis estático tridimensional de láminas graduadas funcionalmente con curvatura constante. La solución se basa en tres ecuaciones de elasticidad escritas en coordenadas curvilíneas ortogonales que son válidas para paneles de cubierta esféricos, cilíndricos y placas rectangulares. Las ecuaciones en términos de las variables de la superficie media se resuelven mediante una suma de armónicos en términos del método de Navier, que es válido solo para estructuras simplemente apoyadas. Las ecuaciones en función de la dirección del espesor se resuelven numéricamente por el método de Cuadratura Diferencial (DQM) que permitió calcular fácilmente la derivada aproximada de una función utilizando una suma ponderada de las funciones evaluadas en una determinada grilla. Las capas de la estructura se discretizan por separado mediante la ...
9
tesis de grado
Polyethylene terephthalate (PET) is a widely used material in container manufacturing, particularly in bottle production. It is characterized by its low cost and widespread availability. However, its improper disposal has significantly exacerbated global plastic pollution. For instance, less than 50% of plastic bottles are recycled. Moreover, studies indicate that this issue has led to a significant accumulation of plastic waste in the oceans, which continues to grow annually and could be considered floating islands of debris. This study proposes replacing PET with polylactic acid (PLA), a biodegradable and biocompatible polymer with suitable properties for bottle production. PLA also has a shorter decomposition time compared to PET, contributing to the reduction of carbon footprint and greenhouse gas emissions. The research methodology included a diagnostic phase to define objectives, i...
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This paper seeks to describe and analyze the role of professionals in the field of education as one of the main agents who contribute to the socio-labor inclusion of youth with Intellectual Functional Diversity (IFD). Based on the complementarity of the quantitative and qualitative methods, we have delved into the significance of providing quality training to advisors and faculty, one which will enable them to foster the development of personal, social and labor skills and competencies in youth with IFD, so they can access employment and adulthood in an easier manner. Additionally, we have highlighted the significance of training these professionals in innovative methodologies to respond to their students’ diversity and promote the transferability of their learning to new contexts. To conclude, we have been aware of these professionals’ great commitment despite the lack of sufficien...
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This paper seeks to describe and analyze the role of professionals in the field of education as one of the main agents who contribute to the socio-labor inclusion of youth with Intellectual Functional Diversity (IFD). Based on the complementarity of the quantitative and qualitative methods, we have delved into the significance of providing quality training to advisors and faculty, one which will enable them to foster the development of personal, social and labor skills and competencies in youth with IFD, so they can access employment and adulthood in an easier manner. Additionally, we have highlighted the significance of training these professionals in innovative methodologies to respond to their students’ diversity and promote the transferability of their learning to new contexts. To conclude, we have been aware of these professionals’ great commitment despite the lack of sufficien...
12
artículo
This paper seeks to describe and analyze the role of professionals in the field of education as one of the main agents who contribute to the socio-labor inclusion of youth with Intellectual Functional Diversity (IFD). Based on the complementarity of the quantitative and qualitative methods, we have delved into the significance of providing quality training to advisors and faculty, one which will enable them to foster the development of personal, social and labor skills and competencies in youth with IFD, so they can access employment and adulthood in an easier manner. Additionally, we have highlighted the significance of training these professionals in innovative methodologies to respond to their students’ diversity and promote the transferability of their learning to new contexts. To conclude, we have been aware of these professionals’ great commitment despite the lack of sufficien...
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Objective: To compare the professional performance of the health establishments with essential obstetric and neonatal functions from Lima with respect provincie during September-October of 2015. Materials and methods: It´s a cross- sectional analytical investigation conducted in 350 health establishments with essential obstetric-neonatal functions I-II (FONE I-II) database based on national surveys conducted by the National Institute of Statistics and Informatics (INEI) during 2015. New variables were created from the databases to determinate the gynecology staff´s professional performance and analyzed the data with the R statistical software and the IBM SPSS Statistics 25 using the chi-square test. Results: The investigation showed that midwifes were the healthl staff who most frequently attended vaginal births, both in Lima (62.9%) and in provinces (91.4%). With respect to the partog...
14
artículo
Objective: To compare the professional performance of the health establishments with essential obstetric and neonatal functions from Lima with respect provincie during September-October of 2015. Materials and methods: It´s a cross- sectional analytical investigation conducted in 350 health establishments with essential obstetric-neonatal functions I-II (FONE I-II) database based on national surveys conducted by the National Institute of Statistics and Informatics (INEI) during 2015. New variables were created from the databases to determinate the gynecology staff´s professional performance and analyzed the data with the R statistical software and the IBM SPSS Statistics 25 using the chi-square test. Results: The investigation showed that midwifes were the healthl staff who most frequently attended vaginal births, both in Lima (62.9%) and in provinces (91.4%). With respect to the partog...
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Objective: To ascertain that social and emotional deprivation of the mother is associated with fetal growth restriction, fetal death, preterm birth and congenital defects. Materials and Methods: We retrieved the maternal and perinatal outcome from the Informatic Perinatal System of all pregnancies with antenatal care whose delivery occurred between January 1, 1992 and December 31, 2001. Three groups of patients with social and emotional deprivation were included: 1) single women (n=1285), 2) teenage women with absent prenatal care (APC), (n=2131), and 3) primigravid with stature lower than 160 cm (n=35722). Maternal and perinatal outcome were compared with: 1) women living with sexual partner (n=5550), 2) teenage women with prenatal care (n=7644), and 3) primigravids taller than 159 cm (n=5264). Odds ratio and 95% confidence interval (CI) were calculated. Results: Single women presented ...
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The Quality Function Deployment (QFD) and the Theory of Inventive Problem Solving (TRIZ) are independent methodologies, that can be used and developed freely, but can be an important enhancer when you want to achieve innovation if they work together. The objective of this article is to present an analysis of the customers’ requirements in a product manufactured with biodegradable materials, the output result when applying the QFD was the quality critic related to toxicity, while the input information for the matrix TRIZ’s technical contradictions were the translation of the quality critic to one of the 39 technical design parameters, corresponding to parameter 30 (Harmful factors acting on the object from outside), being considered as the transfer point between the methodologies thus achieving the integration of both.
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The Quality Function Deployment (QFD) and the Theory of Inventive Problem Solving (TRIZ) are independent methodologies, that can be used and developed freely, but can be an important enhancer when you want to achieve innovation if they work together. The objective of this article is to present an analysis of the customers’ requirements in a product manufactured with biodegradable materials, the output result when applying the QFD was the quality critic related to toxicity, while the input information for the matrix TRIZ’s technical contradictions were the translation of the quality critic to one of the 39 technical design parameters, corresponding to parameter 30 (Harmful factors acting on the object from outside), being considered as the transfer point between the methodologies thus achieving the integration of both.
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Introduction and objectives: The objective of this study is to determine if the type of cleft lip and palate is associated with a higher risk of alteration of the Eustachian tube. Materials and methods: A descriptive case series study was carried out with an inferential analysis of children operated on for cleft lip and palate at the San Bartolomé hospital during the years 2018 and 2019. Results: 48 patients with tympanometry were evaluated, 62.5% male (n = 30) and 37.5% female (n = 18), the mean age was 1.3 years. The type of cleft lip and palate was determined using the Veau classification, the most frequent type found was Veau type III: 62.5% (n = 30), the least frequent type was Veau I with 4.2% (n = 2). The evaluation of the function of the Eustachian tube was performed with tympanometry, defining the type B curve as pathological. In the studygroup, there was an overall prevalence ...
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Introduction and objectives: The objective of this study is to determine if the type of cleft lip and palate is associated with a higher risk of alteration of the Eustachian tube. Materials and methods: A descriptive case series study was carried out with an inferential analysis of children operated on for cleft lip and palate at the San Bartolomé hospital during the years 2018 and 2019. Results: 48 patients with tympanometry were evaluated, 62.5% male (n = 30) and 37.5% female (n = 18), the mean age was 1.3 years. The type of cleft lip and palate was determined using the Veau classification, the most frequent type found was Veau type III: 62.5% (n = 30), the least frequent type was Veau I with 4.2% (n = 2). The evaluation of the function of the Eustachian tube was performed with tympanometry, defining the type B curve as pathological. In the studygroup, there was an overall prevalence ...
20
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Objective: The operationalization and the role of a participatory model of diagnostic and therapeutic formulations called Foster Groups, implemented in a Community Mental Health Center in Lima, Peru, are analyzed. Material and Methods: The research was based on the participanting observation by experts in community mental health, public health, communication and social sciences, of a total of 24 Foster Group sessions held at the Nancy Reyes Community Mental Health Center in Chorrillos, Lima Peru, during the years 2018-2019. Results: The Foster Groups are structured in sequential phases that follow a logical process of diagnostic formulations and management plans, concurrently performed by professionals from different disciplines for a small group of users, thus allowing both, diagnoses as plans, to be more comprehensive. An environment of trust is generated, allowing people to share expe...