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1
artículo
The products derived from the weathering process of soils can be removed from this system by the process of water drainage or they can react in this system by forming a variety of crystall or amorphous products. The reaction products that are most commonly observed are the clay minerals, the oxides and hydroxides iron and aluminum. The characterization of these materials is of vital importance because they reflect at its best the long term effects of the chemical environment and draining mechanisms of soils. Moreover, they have a marked influence on many soil properties. This paper reports the results of the elemental and mineralogical characterization of a soil sample from the Motupe orchard and nursery farm that belongs to the Pedro Ruiz Gallo National University, Lambayeque, using X-ray Fluorescence (XRF), X-ray Diffraction (XRD) and Transmission Mössbauer Spectroscopy (EMT) techniqu...
2
artículo
The products derived from the weathering process of soils can be removed from this system by the process of water drainage or they can react in this system by forming a variety of crystall or amorphous products. The reaction products that are most commonly observed are the clay minerals, the oxides and hydroxides iron and aluminum. The characterization of these materials is of vital importance because they reflect at its best the long term effects of the chemical environment and draining mechanisms of soils. Moreover, they have a marked influence on many soil properties. This paper reports the results of the elemental and mineralogical characterization of a soil sample from the Motupe orchard and nursery farm that belongs to the Pedro Ruiz Gallo National University, Lambayeque, using X-ray Fluorescence (XRF), X-ray Diffraction (XRD) and Transmission Mössbauer Spectroscopy (EMT) techniqu...
3
artículo
Taxidermy is an encounter between science, technique and art in favor of education and scientific culture. The objective of this research work is to propose a complementary course of basic taxidermy for the students of the second year of the Primary Teachers' career of the Pedagogical School "Manuel Ascunce Domenech", located in the city of Santa Clara, province of Villa Clara, Cuba. In order to carry out the research, the methods of information gathering and processing of the information gathered in their dialectic interrelation were used, within the latter, observation and survey stand out. It was found that in this institution there are no natural objects, namely animals preserved in liquid or dissected, which facilitate a better understanding when using them as a means of teaching the contents related to the teaching-learning process of Biology, and the students and teachers have ins...
4
artículo
Objective: Determine the relationship between maternal knowledge and practices on complementary feeding in a health center in Lambayeque, Peru 2021. Method: This research was non-experimental, quantitative, correlational, cross-sectional. The sample consisted of 151 mothers, obtained by StatCalc, from a population of 250. The sampling was simple random probabilistic, the technique used was the survey and the instrument was a questionnaire prepared by Barzola, resulting in 0.059 in the table of concordance, determining its validity, the Kuder Richardson statistical test was also applied with a result of 0.62. Subsequently, descriptive tables were built on the variables studied and the Pearson correlation and determination model was used through SPSS V24 software. The ethical criteria taken into account during the investigation were: respect for people, justice and beneficence. Main result...
5
artículo
The restoration of endodontically treated teeth (RETT) is a subject in constant study, in order to obtain safe clinical protocols that can improve treatments longevity. In recent years, the search for complementary methodologies to bond-strength proves has been growing for evaluating RETTE, being important to know the most used complementary methods’ advantages and disadvantages to evaluate this. The aim of this study is to present a literature review on complementary methods to bond strength and the fracture strength tests. The articles search was done in databases: PUBMED, BBO (Brazilian Dental Library), LILACS (Health Literature of Latin America and the Caribbean), SciELO and Medline, using the keywords “endodontically treated teeth” and “prefabricated post” from 1990 to 2020. Out of 360 articles 295 were excluded because they did not present relevant information for this re...
6
artículo
La investigación verificó si existe gestión de la información contable por medio de accruals discrecionales específicos en entidades de previsión complementaria, lo que podría ocurrir a partir de la decisión de registro contable de lasprovisiones contingentes con la intención de mejorar resultados divulgados en los estados financieros consolidados. Para ello, se compuso una muestra con las 30 mayores entidades de previsión complementaria que actúan en Brasil, en relación al activo total, en sus sectores de actuación, siendo 15 EFPC y 15 EAPC. Los datos fueron del período de 2010 a 2017 y la técnica utilizada fue regresión de datos en panel por medio del método MQO agrupado. Con el análisis de los resultados, se percibió que el Pasivo Operativo y el Resultado Operativo explican los cambios en las provisiones contingenciales, mostrando que hubo gestión por parte de los ...
7
tesis de grado
Ribosome profiling (RP) is a novel technique that exploits RNA sequencing and ribosome immobilization to quantify transcription and translation at different cell growth stages. Therefore, RP provides invaluable information for expression dynamics studies. Quantitative –omics studies are of crucial importance for identification of potential biomarkers of infection. An ideal parasite detection system should definitely establish the presence or absence of infection; determine the species involved; be detectable even in low concentrations; be proportional to parasite density; and determine the presence of antibiotic resistance.
8
artículo
Objective. To compare the microhardness in a composite resin of nanoparticles with complementary techniques of light curing r; based on the principle of wave length and intensity of light that need materials for their conversion. Material and methods. Experimental study. 90 blocks of a composite resin of nanoparticles whose dimensions were 10mm of diameter and 2mm of thick were manufactured, those blocks were separated into three groups according to the type of light exposure : technique of Low Light (Soft star), technique of flashing light (Blinking light),technique of intense light (strong light), then the samples were taken to an indenter of last generation Zwick / ROLL Indentec ZHV with an increase (eye) of 20X to see better the footprint where a load of 500 g on the surface (indentation) was applied in order to determine the microhardness.Results. The results showed according to the...
9
tesis de grado
El presente estudio tiene como objetivo determinar los conocimientos de las madres de sus niños de 6 a 12 meses sobre Alimentación Complementaria en el Centro de Salud Los Libertadores - SMP .El estudio fue de nivel aplicativo, tipo cuantitativo, método descriptivo simple de corte transversal. La población estuvo conformada por 64 madres, obtenida por criterios de exclusión. El instrumento que se utilizó para la recolección de datos fue el cuestionario y como técnica la entrevista semi - estructurada. Este trabajo consta de los capítulos: Capítulo I. Planeamiento de problema en el cual se expone la identificación, formulación, obejtivos, justificación y importancia del problema. Capítulo II. Marco teórico que incluye antecedentes del estudio marco teórico y definiciones de términos básicos. Capítulo III. Variables e hipótesis que presentan variables operacionalizació...
10
artículo
This study seeks to analyze whether the use of the seminar technique, an active technique, as a complementary tool to lecture and exercise resolution, influences the level of cognitive development of students. In methodological terms, a quasi-experiment was carried out with students of the 4th semester of Accounting Sciences of a Federal Institution of Higher Education. The results showed that the use of the seminar, regarding the levels "remember, apply and analyze", was able to influence the cognitive development of students.It is concluded that the use of the seminar technique, as a complementary instrument, can influence the level of cognitive development achieved by accounting students.
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tesis de grado
El presente trabajo de la investigación incluye la alimentación complementaria radica en la adecuada ingesta de alimentos que el niño consuma para cubrir sus necesidades y poder desarrollarse saludablemente, de allí la importancia del conocimiento de la madre que asegure un estado nutricional en su niño a partir de los seis meses. El objetivo del estudio fue determinar la relación entre el nivel de conocimiento sobre alimentación complementaria en madres y el estado nutricional de niños de 6 a 12 meses del Centro de Salud de Condorillo Alto Chincha 2016. Material y métodos: para la recolección de datos se utilizó la técnica de la encuesta cuyo instrumento fue un cuestionario para el nivel de conocimiento y análisis documental para establecer el estado nutricional utilizando una ficha nutricional, ambos instrumentos fueron previamente validado a través de juicio de expertos,...
12
tesis doctoral
Hydrogenated Aluminum Oxynitride (AlNxOy:H) is a versatile material for the surface passivation of crystalline silicon (c-Si). The capability of having positive or negative fixed charges makes AlNxOy:H a suitable material for surface passivation of both n-type and p-type c-Si. Terbium (Tb) implemented in thin films is known for its potential for downshifting light. This work studies the electronic properties of the Tb-doped AlNxOy:H/cSi(p) interface. The studied samples’ layers were deposited by reactive direct current (DC) sputtering with different hydrogen flows and then annealed. Due to high leakage currents and high defect densities, the electronic properties of the Tb-doped AlNxOy:H layers could not be analyzed conclusively using standard techniques such as high-frequency capacitance-voltage (HF-CV) or quasi-steady-state photoconductance (QSSPC) measurements, respectively. As an a...
13
tesis doctoral
Hydrogenated Aluminum Oxynitride (AlNxOy:H) is a versatile material for the surface passivation of crystalline silicon (c-Si). The capability of having positive or negative fixed charges makes AlNxOy:H a suitable material for surface passivation of both n-type and p-type c-Si. Terbium (Tb) implemented in thin films is known for its potential for downshifting light. This work studies the electronic properties of the Tb-doped AlNxOy:H/cSi(p) interface. The studied samples’ layers were deposited by reactive direct current (DC) sputtering with different hydrogen flows and then annealed. Due to high leakage currents and high defect densities, the electronic properties of the Tb-doped AlNxOy:H layers could not be analyzed conclusively using standard techniques such as high-frequency capacitance-voltage (HF-CV) or quasi-steady-state photoconductance (QSSPC) measurements, respectively. As an a...
14
artículo
The authors want to thank Lucía González and Laura Fernández for technical assistance. Dr. Erin Bromage (University of Massachusetts Dartmouth, USA) is also acknowledged for supplying the anti-IgD and anti-CD3 antibodies used in this study. This work was supported by the European Research Council (ERC Consolidator Grant 2016 725061 TEMUBLYM). Carlos Távara would like to acknowledge the financial support from the Master Program in Aquatic Animal Health of the UPCH subsidized by Cienciactiva of CONCYTEC (Management Agreement No. 230-2015- FONDECYT-DE-PROMOCION 2). Carlos Távara also would like to acknowledge Vitapro S.A. for the interest in this research and support in the development of this work. E. Muñoz-Atienza holds a Juan de la Cierva-Formación Postdoctoral Contract (FJCI-2015-24452) funded by the Spanish Ministry of Economy, Industry and Competitiveness.
15
tesis de grado
La articulación temporo mandibular o complejo articular cráneo mandibular, está situada delante de los oídos y es una de las articulaciones más complejas del cuerpo, clasificada como ginglimoartroidal o diartrosis bicondílea. Está compuesta por un conjunto de estructuras anatómicas que, con la ayuda de grupos musculares específicos, permiten a la mandíbula ejecutar variados movimientos asociados a la función masticatoria como apertura, cierre, protrusión, retrusión y lateralidad. Esta articulación puede ser afectada por alteraciones que comprometan su morfología y fisiología normal, la etiología puede ser diversa debido a procesos inflamatorios, traumáticos, neoplásicos, mal formativos, infecciosos, degenerativos y disfuncionales. La patología de la ATM, es compleja y compete a diversas especialidades médicas y odontológicas involucradas en su manejo. Una de estas p...
16
artículo
The objective of the present study was to determine and compare the levels of the relative expression of messenger RNA (mRNA) of IgA in intestinal epithelium of newborn alpaca up to 45 days old, that were in good health status (n=35) and ill with enteropathy (n=35). In each group, five animals were newborns before the consumption of colostrum and five for each week of age until the sixth week. Samples consisted in 2 cm length of jejunum, which was immediately preserved at -196 °C. The extraction was done with Trizol®, then complementary DNA (cDNA) was synthesized. Subsequently, the conventional PCR and real time RT-PCR was conducted using oligonucleotides designed for detecting the exon 1 of the Fc IgA region of alpaca. The quantification of the relative expression was made through normalization with the GAPDH gene mRNA and the relative expression calculations were conducted using the ...
17
artículo
El presente estudio tuvo como objetivo determinar y comparar los niveles de expresión relativa de ARN mensajero (ARNm) de IgA en el epitelio intestinal de las crías de alpacas en aparente buen estado de salud (n=35) o enfermas con enteropatía (n=35). Encada grupo se incluyeron cinco animales recién nacidos antes del consumo de calostro y cinco por cada semana de edad hasta la sexta semana. Se tomaron 2 cm de yeyuno por animal y se almacenaron en congelación a -196 °C. Se realizó la extracción de ARN total con Trizol® y luego se sintetizó el ADN complementario (ADNc). Posteriormente se realizó el PCR y la RT-PCR Tiempo Real empleando oligonucleótidos diseñados para la detección del exón 1 de la región Fc IgA de alpaca. Se realizó la cuantificación de la expresión relativa mediante normalización con ARNm del gen GAPDH y los cálculos de la expresión relativa se realiza...
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artículo
This is the case of a 46-year-old man, asymptomatic, with a history of single-disk mechanical aortic prosthesis implanted 25 years ago, who was incidentally diagnosed with a pseudoaneurysm of the mitral-aortic intervalvular fibrosa (a region of fibrous tissue located between the anterior leaflet of the mitral valve and the left and non-coronary aortic leaflets) discovered by means of a transthoracic echocardiography, transesophageal echocardiography and cardiac computed tomography. Surgery was decided because of the size of the pseudoaneurysm. This article shows the late presentation of a pseudoaneurysm in this location caused by a complication of an aortic valve replacement due to endocarditis. It also highlights the asymptomatic evolution, the size of the pseudoaneurysm and the election of a valve preserving surgery because the valve was not compromised. The different imaging technique...
19
tesis de grado
El presente estudio tuvo como objetivos determinar y comparar los niveles de expresión relativa de ARN mensajero (ARNm) de IgA en el epitelio intestinal de las crías de alpacas sanas y enfermas con enteropatía hasta los 45 días de edad. Se muestrearon 70 animales: 35 sanas y 35 enfermas; 5 crías antes del consumo de calostro y 5 por cada semana de edad hasta la sexta semana. Las muestras consistieron en 2 cm de longitud del yeyuno, la cual fue inmediatamente conservada en nitrógeno líquido (-196°C). Se realizó la extracción de ARN total con Trizol®, luego se sintetizó ADN complementario (ADNc). Posteriormente se realizó la PCR convencional y la RT- PCR Tiempo Real empleando oligonucleótidos diseñados para la detección del exón 1 de de la región Fc IgA de alpaca. Se realizó la cuantificación de la expresión relativa mediante normalización con ARNm del gen GAPDH y los...
20
tesis de maestría
El derecho fundamental a la educación debe estar revestido de calidad para su pleno ejercicio; sin embargo, la realidad ha demostrado que, a pesar de los esfuerzos realizados, ello no siempre logra materializarse. Es por esta razón que esta investigación se enfocó en describir la situación de la calidad educativa superior en el marco del respeto del derecho fundamental a la educación en la región Cusco durante el año 2019. El estudio contó con la participación de 20 estudiantes y 6 especialistas en Educación y Derecho Constitucional, pertenecientes universidades licenciadas en Cusco, quienes a través de entrevistas compartieron sus experiencias con relación a la calidad educativa y el ejercicio del derecho fundamental a la educación. Adicionalmente, se aplicó la técnica de investigación documental legislativa para identificar los fundamentos jurídicos nacionales pertine...