El saber técnico popular en la investigación y desarrollo de tecnologías apropiadas : el caso de los horticultores del parque Pereyra Iraola

p.89-97Pequeños productores del Parque Pereyra Iraola (Buenos Aires) han comenzado un proceso de conversión hacia la producción hortícola sin agrotóxicos, con asesoramiento técnico del Programa Cambio Rural Bonaerense. Investigadores de la Facultad de Agronomía de la Universidad de Buenos Aires participan desde 2003 en este proceso, aplicando el método de Interacción del Saber Técnico Popular (STP) y el Saber Científico (SC). Esta metodología complementaria de investigación se fundamenta en reconocer la validez y la utilidad del saber técnico popular y la fuerza y eficacia que puede generar su interacción con el saber científico. Las diversas actividades de vinculación STP-SC incluyen relevamiento de innovaciones desarrolladas por productores, experimentos realizados por ellos e identificación de taxonomías utilizadas. La metodología de trabajo incluyó entrevistas a productores, visitas a las huertas; planificación, seguimiento y evaluación conjunta de ensayos; y participación en actividades de capacitación y reflexión con técnicos y horticultores. Se identificaron y estudiaron preparados caseros utilizados por los horticultores para el control de adversidades fitosanitarias y se apoyó el desarrollo de ensayos de biofumigación para el control de plagas del suelo

Fungicidal behavior of laundering detergents as a function of water temperature

The effects of varied detergent types and concentrations and of three laundering water temperatures on the sanitation of a typical 50 percent polyester/50 percent cotton blend sheeting were studied. Water temperatures selected were 43°, 51°, and 60°C. Six detergent types were chosen on the basis of distinctive components in their formulations; Tide, Oxydol, All, Biological Bold, Wisk, and Dynamo. The three detergent concentrations corresponded to half the recommendation of the manufacturer, the exact recommendation, and twice the recommendation. Sterile fabric specimens were inoculated with a broth culture of the fungus Trichophyton mentagrophytes and laundered at the regular wash cycle in a top-loading heavy-duty home washer. After laundering, fabric swatches were cut and deposited on RODAC plates. Contaminated fabric swatches were counted to determine fungal survival after laundering treatments. Data derived from RODAC counts were statistically analyzed using the analysis of variance procedure

Programa de Internship y su incidencia en el perfil laboral de los estudiantes de la Escuela Profesional de Turismo

El objetivo del presente trabajo de investigación es demostrar que el programa de Internship mejoraría el perfil laboral de los estudiantes de la Escuela profesional de turismo en la Universidad Nacional San Antonio Abad Del Cusco, tomando en cuenta que la actividad turística se caracteriza por el movimiento creciente de masas, en busca de distracción, relajación, etc., los 25 millones de personas que viajaban por ocio en 1950 se han multiplicado hasta llegar a 1 184 millones en el 2015. La naturaleza compleja del problema de investigación, constituida por dos realidades una objetiva y otra subjetiva permite abordar el problema desde un enfoque mixto, que implica un proceso sistemático empírico y crítico, que implican la recolección y análisis de datos cuantitativo y cualitativos, así como su integración conjunta, de esta forma lograr un mejor entendimiento del fenómeno objeto de estudio

INFLUENCIA DEL CLIMA ORGANIZACIONAL EN LA GESTIÓN ADMINISTRATIVA DEL ÁREA DE LOGÍSTICA DE LADRILLERA EL DIAMANTE LADISAC AREQUIPA 2014

CLIMA ORGANIZACIONAL GESTIÓN GESTIÓN ADMINISTRATIVA LOGÍSTICA PLANIFICACIÓN CONTROL INTERNO HISTORIA MISIÓN Y VISIÓN ORGANIGRAMA DISTRIBUCIÓN DE ZONAS SEGURAS ÁREA DE LOGÍSTICA ORGANIGRAMA PROPUESTO PARA EL ÁREA LOGÍSTICA DATOS DE LA EMPRESA SLOGAN FABRICACIÓN DEL LADRILLO LADRILLOS USOS TIPOS DE LADRILLO APAREJO

Efeito das técnicas de inserção e alisamento na estabilidade de cor e rugosidade superficial de resinas compostas

Introduction: Longevity and clinical success of dental restorations can be influenced by many factors during the restorative procedures. Objective: This study aimed to evaluate the influence of different placement techniques on color stability and surface roughness of two resin composites. Material and method: The groups of specimens (n=10) were divided according to resin composite (FiltekTM Z250 XT and FiltekTM Z350 XT) and placement technique: Mylar strip, spatula, dry brush, modeling liquid, and surface sealant. Color stability and surface roughness were accessed using a spectrophotometer (CIELab color space) and a rugosimeter (standard cutoff of 0.8 mm), respectively, after water storage. Subsequently, the specimens were immersed in coffee for 48 h and final color was measured. The data were analyzed using ANOVA and the Tukey’s post hoc test (α=5%) and the correlation between surface roughness (Ra) and color change (∆Eab) was assessed using the Pearson’s correlation coefficient. Result: The different placement techniques influenced Ra and ∆Eab on both resin composites. The groups treated with surface sealant showed greater difference in ∆Eab for both resin composites. The FiltekTM Z250 XT resin showed greater color stability compared with the FiltekTM Z350 XT resin regardless of the placement technique used. Ra of each placement technique was similar among the resin composites except for the FiltekTM Z350 XT modeling liquid group, which presented lower Ra values compared with those of FiltekTM Z250 XT. A correlation between Ra and staining was identified (p=0.268). Conclusion: Color stability and Ra are influenced by different placement techniques.Introdução: A longevidade e o sucesso clínico das restaurações dentárias podem ser influenciados por muitos fatores durante os procedimentos restauradores. Objetivo: Avaliar a influência da técnica de alisamento na estabilidade de cor e rugosidade superficial de duas resinas compostas. Material e método: Os grupos de amostras (n=10) foram divididos conforme a resina composta (FiltekTM Z250 XT e FiltekTM Z350 XT) e as técnicas empregadas: tira de poliéster, espátula, pincel seco, selante de superfície. A cor e a rugosidade da superfície foram avaliadas por espectrofotômetro (espaço de cor CIELab) e rugosímetro (corte padrão de 0,8 mm), respectivamente, após o armazenamento em água. Posteriormente, as amostras foram imersas em café por 48h e a cor final foi aferida. Os dados foram analisados usando teste ANOVA e Tukey post hoc (α = 5%) e a correlação entre rugosidade da superfície (Ra) e variação de cor (∆Eab) através do coeficiente de correlação de Pearson. Resultado: As técnicas de alisamento influenciaram a Ra e a ∆Eab em ambas as resinas compostas. Os grupos tratados com selante de superfície apresentaram maior diferença na ∆Eab. A resina FiltekTM Z250 XT apresentou maior estabilidade de cor comparada à FiltekTM Z350 XT, independentemente da técnica utilizada. A Ra das técnicas de alisamento foi semelhante entre os compósitos, exceto para o grupo do líquido modelador da FiltekTM Z350 XT, que apresentou os menores valores. Uma correlação entre Ra e manchamento (p = 0,268) foi identificada. Conclusão: A estabilidade da cor e a Ra são influenciadas pelas técnicas de alisamento utilizadas

Experimental versus computational determination of the dynamical model of a glider

In this paper we present and compare two air- craft model identification techniques that are easy to implement and suitable for various air- plane models, gliders comprised. One of them relies on flight data, while the second one uses a virtual model of the plane. To obtain the flight data, we propose a flight protocol that is simple to follow. Our analysis show that the methods find resembling results for similar airspeeds

Decreased Fatty Acid Transporter FABP1 and Increased Isoprostanes and Neuroprostanes in the Human Term Placenta: Implications for Inflammation and Birth Weight in Maternal Pre-Gestational Obesity.

The rise in prevalence of obesity in women of reproductive age in developed and developing countries might propagate intergenerational cycles of detrimental effects on metabolic health. Placental lipid metabolism is disrupted by maternal obesity, which possibly affects the life-long health of the offspring. Here, we investigated placental lipid metabolism in women with pre-gestational obesity as a sole pregnancy complication and compared it to placental responses of lean women. Open profile and targeted lipidomics were used to assess placental lipids and oxidised products of docosahexaenoic (DHA) and arachidonic acid (AA), respectively, neuroprostanes and isoprostanes. Despite no overall signs of lipid accumulation, DHA and AA levels in placentas from obese women were, respectively, 2.2 and 2.5 times higher than those from lean women. Additionally, a 2-fold increase in DHA-derived neuroprostanes and a 1.7-fold increase in AA-derived isoprostanes were seen in the obese group. These changes correlated with a 70% decrease in placental FABP1 protein. Multivariate analyses suggested that neuroprostanes and isoprostanes are associated with maternal and placental inflammation and with birth weight. These results might shed light on the molecular mechanisms associated with altered placental fatty acid metabolism in maternal pre-gestational obesity, placing these oxidised fatty acids as novel mediators of placental function

Gesti?n de la sostenibilidad, an?lisis de los criterios de innovaci?n frugal en empresas peruanas con Certificaci?n B y la participaci?n del profesional de Psicolog?a Organizacional

En la ?ltima d?cada, ha habido un creciente inter?s por el estudio de la innovaci?n frugal y su relaci?n con la sostenibilidad, en pa?ses emergentes. La literatura reporta que la innovaci?n frugal cuenta con componentes que integran la sostenibilidad para brindar soluciones suficientes, de calidad y asequibles para usuarios finales, incluso de escasos recursos. Este estudio busca dar contexto de las empresas sostenibles en el Per?, evaluando el nivel de desarrollo de innovaciones frugales. Esto se logr? a trav?s de la revisi?n del universo de empresas peruanas certificadas en B, comparando sus propuestas para identificar si calificaba como innovaci?n frugal. Finalmente, esta investigaci?n apunta a contribuir a la literatura y puesta en pr?ctica para generar conciencia en el p?blico y otras organizaciones, as? como a revisar el rol del psic?logo organizacional en la adopci?n de este nuevo enfoque

Podbat: A Novel Genomic Tool Reveals Swr1-Independent H2A.Z Incorporation at Gene Coding Sequences through Epigenetic Meta-Analysis

Epigenetic regulation consists of a multitude of different modifications that determine active and inactive states of chromatin. Conditions such as cell differentiation or exposure to environmental stress require concerted changes in gene expression. To interpret epigenomics data, a spectrum of different interconnected datasets is needed, ranging from the genome sequence and positions of histones, together with their modifications and variants, to the transcriptional output of genomic regions. Here we present a tool, Podbat (Positioning database and analysis tool), that incorporates data from various sources and allows detailed dissection of the entire range of chromatin modifications simultaneously. Podbat can be used to analyze, visualize, store and share epigenomics data. Among other functions, Podbat allows data-driven determination of genome regions of differential protein occupancy or RNA expression using Hidden Markov Models. Comparisons between datasets are facilitated to enable the study of the comprehensive chromatin modification system simultaneously, irrespective of data-generating technique. Any organism with a sequenced genome can be accommodated. We exemplify the power of Podbat by reanalyzing all to-date published genome-wide data for the histone variant H2A.Z in fission yeast together with other histone marks and also phenotypic response data from several sources. This meta-analysis led to the unexpected finding of H2A.Z incorporation in the coding regions of genes encoding proteins involved in the regulation of meiosis and genotoxic stress responses. This incorporation was partly independent of the H2A.Z-incorporating remodeller Swr1. We verified an Swr1-independent role for H2A.Z following genotoxic stress in vivo. Podbat is open source software freely downloadable from www.podbat.org, distributed under the GNU LGPL license. User manuals, test data and instructions are available at the website, as well as a repository for third party–developed plug-in modules. Podbat requires Java version 1.6 or higher