Tdah y el rendimiento académico en estudiantes de nivel primaria en una institución educativa - Callao, 2022

Esta investigación, tuvo como objetivo general determinar la correlación que existe entre el TDAH con el rendimiento académico en estudiantes de nivel primaria en una institución educativa - callao, 2022, por lo cual se tuvo que desarrollar una investigación de tipo básica. El estudio es de diseño no experimental, de nivel correlativo; tiene una la población de 144 escolares, existiendo la muestra de 24 escolares del sexto grado de primaria, la muestra es no probabilística, por conveniencia, donde se aplicó como herramienta el cuestionario para la primera variable con un total de 10 ítems y para la segunda variable un total de 20 ítems. El procedimiento descriptivo se obtuvo mediante la elaboración de las tablas de distribución de frecuencias, gráficos de barras y la observación de interpretación que llevó a conseguir los resultados precisos para considerar la relación entre las dos variables estudiadas. En los resultados se halló que, sí existe correlación entre el Tdah y el rendimiento académico en los escolares de primaria, esto se comprueba con la prueba de Shapiro-Wilk (Sig. Ajus. =0.000), asimismo, se encontraron que sí coexisten relación entre las dimensiones: inatención, hiperactividad e impulsividad (Sig. Ajus. =0.000), según las pruebas realizada

Efectos del Programa “Desarrollando Aprendizajes con las Laptop XO” en la Comprensión Lectora en los Estudiantes del 6to.Grado de Primaria de la I.E. N° 1086 Jesús Redentor San Miguel -2013

En el presente trabajo de investigación titulado: EFECTOS DEL PROGRAMA “DESARROLLANDO APRENDIZAJE CON LAS LAPTOP XO” EN LA COMPRENSION LECTORA DE LOS ESTUDIANTES DEL 6TO. GRADO DE PRIMARIA DE LA I. E. N° 1086 “JESÚS REDENTOR”- SAN MIGUEL - 2014, se planteó como problema de investigación: ¿Cuáles son los efectos del Programa “Desarrollando Aprendizaje con las laptop XO” en la Comprensión Lectora de los estudiantes del 6to. Grado de Primaria de la I.E. N° 1086 “Jesús Redentor”? Teniendo como objetivo general determinar cuáles son los efectos del Programa “Desarrollando Aprendizaje con las laptop XO” en la Comprensión Lectora de los estudiantes del 6to. Grado de Primaria de la I.E. N° 1086 “Jesús Redentor”. Esta investigación fue un estudio de tipo explicativa de una investigación cuasi experimental, con un diseño Experimental, en una población y muestra de 25 estudiantes grupo experimental y 25 estudiantes grupo de control de la I.E. N° 1086 “Jesús Redentor” Se aplicó dos instrumentos al grupo experimental. Para la variable independiente: se elabora el Programa “DESARROLLANDO APRENDIZAJES CON LAS LAPTOP XO” que consta de 15 sesiones de aprendizaje aplicada al grupo experimental, se aplica la técnica de la observación y el instrumento fue una guía de observación, para la variable dependiente: COMPRENSIÓN LECTORA, la técnica de prueba y el instrumento fue una prueba escrita. Obteniéndose entre sus conclusiones que existe aprendizaje significativo en la Comprensión Lectora con los estudiantes del grupo experimental del 6to grado “B” de la I.E. N° 1086 “Jesús Redentor”

Iridium-(K2-NSi) catalyzed dehydrogenation of formic acid: effect of auxiliary ligands on the catalytic performance

IThe iridium(III) complexes [Ir(H)(Cl)(κ2-NSitBu2)(κ2-bipyMe2)] (2) and [Ir(H)(OTf)(κ2-NSitBu2)(κ2-bipyMe2)] (3) (NSitBu2 = {4-methylpyridine-2-yloxy}ditertbutylsilyl) have been synthesized and characterized including X-ray studies of 3. A comparative study of the catalytic activity of complexes 2, 3, [Ir(H)(OTf)(κ2-NSitBu2)(coe)] (4), and [Ir(H)(OTf)(κ2-NSitBu2)(PCy3)] (5) (0.1 mol%) as catalysts precursors for the solventless formic acid dehydrogenation (FADH) in the presence of Et3N (40 mol%) at 353 K has been performed. The highest activity (TOF5 min ≈ 3260 h−1) has been obtained with 3 at 373 K. However, at that temperature the FTIR spectra show traces of CO together with the desired products (H2 and CO2). Thus, the best performance was achieved at 353 K (TOF5 min ≈ 1210 h−1 and no observable CO). Kinetic studies at variable temperature show that the activation energy of the 3-catalyzed FADH process is 16.76 kcal mol−1. Kinetic isotopic effect (5 min) values of 1.6, 4.5, and 4.2 were obtained for the 3-catalyzed dehydrogenation of HCOOD, DCOOH, and DCOOD, respectively, at 353 K. The strong KIE found for DCOOH and DCOOD evidenced that the hydride transfer from the C–H bond of formic acid to the metal is the rate-determining step of the process

Bestatin is a non-competitive inhibitor of porcine M1 family glutamyl aminopeptidase: Insights for selective inhibitor design

173-180Glutamyl aminopeptidase (APA) is an M1 family membrane-bound ectoenzyme that is a target for the development of antihypertensive and anticancer agents. Bestatin is a natural product described as a classical inhibitor of metallo-aminopeptidases. Although the IC50 value of bestatin vs human APA has been reported, the mechanism of inhibition is unknown. In the present contribution, we demonstrated that bestatin is a non-competitive (α>1) inhibitor of porcine APA (pAPA), with a Ki value of 31.59 μM (α=3.7). A model of the bestatin-pAPA complex predicted that bestatin binds to pAPA similarly to porcine aminopeptidase N (pAPN). The interaction involved catalytic and chelating residues conserved in the M1 family. Additionally, a salt bridge with R877 and a hydrogen bond interaction with T346, both key residues for APA specificity for N-terminal acidic residues were identified. These residues and E213, which forms a hydrogen bond interaction with bestatin, are not conserved in human and porcine APN. The extension of the in silico analysis to amastatin and bestatin analogs probestin, and phebestin, which are APA inhibitors, indicated that they may interact with the same residues. The results indicate that bestatin analogues currently reported to inhibit APN are dual inhibitors of APA and APN and that some APA residues could be targeted to improve inhibitor selectivity

Advancing system and policy changes for social and racial justice: comparing a Rural and Urban Community-Based Participatory Research Partnership in the U.S.

Abstract Background The paper examines the role of community-based participatory research (CBPR) within the context of social justice literature and practice. Methods Two CBPR case studies addressing health inequities related to Type 2 Diabetes and Cardiovascular disease were selected from a national cross-site study assessing effective academic-community research partnerships. One CBPR partnership works with African Americans in rural Pemiscot County, Missouri and the other CBPR partnership works with African American and Latinos in urban South Bronx, New York City. Data collection included semi-structured key informant interviews and focus groups. Analysis focused on partnerships’ context/history and their use of multiple justice-oriented strategies to achieve systemic and policy changes in order to address social determinants of health in their communities. Results Community context and history shaped each partnership’s strategies to address social determinants. Four social justice approaches (identity/recognition, procedural, distributive, and structural justice) used by both partnerships were identified. These social justice approaches were employed to address underlying causes of inequitable distribution of resources and power structures, while remaining within a scientific research framework. Conclusion CBPR can bridge the role of science with civic engagement and political participation, empowering community members to become political agents who integrate evidence into their social justice organizing strategies.http://deepblue.lib.umich.edu/bitstream/2027.42/136166/1/12939_2016_Article_509.pd

Distribution of dendritic cells in AIDS-associated oral Kaposi’s sarcoma

The aim of this study was to determine if the distribution of Langerhans cells (LC) and interstitial dendritic cells (IDC) is altered in AIDS-associated oral Kaposi’s sarcoma when compared to HIV-negative highly vascular oral lesions. Fifty-one cases of AIDS-associated oral Kaposi’s sarcoma and 20 of highly vascular oral lesions were retrospectively retrieved. All cases of Kaposi’s sarcoma were confirmed with immunoreactions against CD34 and HHV-8. Clinical data regarding sex, age and lesions location were obtained from pathology reports. Immunohistochemistry against CD207 (immature dendritic cells) and CD83 (mature dendritic cells) were done. LC were in the epithelium and IDC in the stroma. CD207+ cells predominated in the epithelium of the lesions, whereas CD83+ cells predominated in their stromal compartment. Kaposi’s sarcoma had a lower CD207+ immature LC count (p=0.02) and an increased CD207+ IDC than highly vascular oral lesions (p<0.001). Moreover, Kaposi’s sarcoma also showed an increased number of mature CD83+ IDC than highly vascular oral lesions (p<0.001). There were significant alterations in the distribution of LC and IDC in AIDS-associated Kaposi’s sarcoma when compared to HIV-negative vascular oral lesions, suggesting that changes in their concentrations may play a role in the pathogenesis of Kaposi’s sarcoma.O objetivo deste estudo foi determinar se a distribuição das células de Langerhans (CL) e das células dendríticas intersticiais (CDI) está alterada no sarcoma de Kaposi oral associado à AIDS quando comparado às lesões orais altamente vasculares HIV-negativas. 51 casos de sarcoma de Kaposi oral associado à AIDS e 20 de lesões orais altamente vasculares foram recuperados retrospectivamente. Todos os casos de sarcoma de Kaposi foram confirmados pela positividade para os anticorpos CD34 e HHV-8. Dados clínicos sobre sexo, idade e localização das lesões foram obtidos dos laudos histopatológicos. Foram realizadas imunoistoquímica contra CD207 (células dendríticas imaturas) e CD83 (células dendríticas maduras). As CL estavam presentes no epitélio enquanto as CDI estavam presentes no estroma. As células CD207+ predominaram no epitélio das lesões, enquanto as células CD83+ predominaram no estroma. O sarcoma de Kaposi teve uma contagem mais baixa de CD imaturas CD207+ (p = 0,02) e número aumentado de CDC CD207+ do que lesões orais altamente vasculares (p<0,001). Além disso, o sarcoma de Kaposi também mostrou um número aumentado de CDI CD83+ maduras do que lesões orais altamente vasculares (p<0,001). Houve alterações significativas na distribuição de CL e CDI no sarcoma de Kaposi associado à AIDS quando comparado às lesões orais vasculares HIV-negativas, sugerindo que alterações na distribuição das mesmas podem desempenhar um papel na patogênese do sarcoma de Kaposi.am2020Oral Pathology and Oral Biolog

Community Scientist Program Provides Bi-directional Communication and Co-learning Between Researchers and Community Members

Community involvement in research is key to translating science into practice, and new approaches to engaging community members in research design and implementation are needed. The Community Scientist Program, established at the MD Anderson Cancer Center in Houston in 2018 and expanded to two other Texas institutions in 2021, provides researchers with rapid feedback from community members on study feasibility and design, cultural appropriateness, participant recruitment, and research implementation. This paper aims to describe the Community Scientist Program and assess Community Scientists\u27 and researchers\u27 satisfaction with the program. We present the analysis of the data collected from 116 Community Scientists and 64 researchers who attended 100 feedback sessions, across three regions of Texas including Northeast Texas, Houston, and Rio Grande Valley between June 2018 and December 2022. Community Scientists stated that the feedback sessions increased their knowledge and changed their perception of research. All researchers (100%) were satisfied with the feedback and reported that it influenced their current and future research methods. Our evaluation demonstrates that the key features of the Community Scientist Program such as follow-up evaluations, effective bi-directional communication, and fair compensation transform how research is conducted and contribute to reducing health disparities

Multicentre harmonisation of a six-colour flow cytometry panel for naïve/memory T cell immunomonitoring

Background. Personalised medicine in oncology needs standardised immunological assays. Flow cytometry (FCM) methods represent an essential tool for immunomonitoring, and their harmonisation is crucial to obtain comparable data in multicentre clinical trials. The objective of this study was to design a harmonisation workflow able to address the most effective issues contributing to intra- and interoperator variabilities in a multicentre project. Methods. The Italian National Institute of Health (Istituto Superiore di Sanita, ISS) managed a multiparametric flow cytometric panel harmonisation among thirteen operators belonging to five clinical and research centres of Lazio region (Italy). The panel was based on a backbone mixture of dried antibodies (anti-CD3, anti-CD4, anti-CD8, anti-CD45RA, and anti-CCR7) to detect naive/memory T cells, recognised as potential prognostic/predictive immunological biomarkers in cancer immunotherapies. The coordinating centre distributed frozen peripheral blood mononuclear cells (PBMCs) and fresh whole blood (WB) samples from healthy donors, reagents, and Standard Operating Procedures (SOPs) to participants who performed experiments by their own equipment, in order to mimic a real-life scenario. Operators returned raw and locally analysed data to ISS for central analysis and statistical elaboration. Results. Harmonised and reproducible results were obtained by sharing experimental set-up and procedures along with centralising data analysis, leading to a reduction of cross-centre variability for naive/memory subset frequencies particularly in the whole blood setting. Conclusion. Our experimental and analytical working process proved to be suitable for the harmonisation of FCM assays in a multicentre setting, where high-quality data are required to evaluate potential immunological markers, which may contribute to select better therapeutic options

Ontogeny and thermogenic role for sternal fat in female sheep

Brown adipose tissue acting through a unique uncoupling protein (UCP1) has a critical role in preventing hypothermia in new-born sheep but is then considered to rapidly disappear during postnatal life. The extent to which the anatomical location of fat influences postnatal development and thermogenic function, particularly following feeding, in adulthood, are not known and were both examined in our study. Changes in gene expression of functionally important pathways (i.e. thermogenesis, development, adipogenesis and metabolism) were compared between sternal and retroperitoneal fat depots together with a representative skeletal muscle over the first month of postnatal life, coincident with the loss of brown fat and accumulation of white fat. In adult sheep, implanted temperature probes were used to characterise the thermogenic response of fat and muscle to feeding and the effects of reduced or increased adiposity. UCP1 was more abundant within sternal than retroperitoneal fat and was only retained in the sternal depot of adults. Distinct differences in the abundance of gene pathway markers were apparent between tissues, with sternal fat exhibiting some similarities with muscle that were not apparent in the retroperitoneal depot. In adults, the post-prandial rise in temperature was greater and more prolonged in sternal than retroperitoneal fat and muscle, a difference that was maintained with altered adiposity. In conclusion, sternal adipose tissue retains UCP1 into adulthood when it shows a greater thermogenic response to feeding than muscle and retroperitoneal fat. Sternal fat may be more amenable to targeted interventions that promote thermogenesis in large mammals

Evidence-based Guidelines for the Management of Exocrine Pancreatic Insufficiency After Pancreatic Surgery

To provide evidence-based recommendations for the management of exocrine pancreatic insufficiency (EPI) after pancreatic surgery