69 research outputs found

    Predatory capacity of Tupiocoris cucurbitaceus (Hemiptera Miridae) on several pests of tomato

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    The predator Tupiocoris cucurbitaceus (Spinola) is frequently found preying on whiteflies in greenhouse tomato without pesticide use in Argentina. This study evaluated its preying capacity on several pests, determining the 24 hours consumption of females, males, large and small nymphs on nymphs of Bemisia tabaci (Gennadius), eggs and larvae of Tuta absoluta (Meyrick), nymphs of Myzus persicae (Sulzer) and Tetranychus urticae Koch females. Whitefly consumption varied between 15.7 and 38.2 nymphs/predator, the largest predation corresponding to the females of T. cucurbitaceus that also were most voracious of T. absoluta eggs (147.4) and M. persicae nymphs (19.8). T. cucurbitaceus individuals preyed 3.3 small larvae of T. absoluta while predation of large larvae was negligible for all predator stages. Finally, each predator consumed 27.8 T. urticae females. This information broadens our knowledge about the prey range and consumption capacity of this predator.Instituto de Microbiología y Zoología Agrícola (IMYZA)Fil: López, Silvia Noemí. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Microbiología y Zoología Agrícola; ArgentinaFil: Orozco Muñoz, Arlette. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Microbiología y Zoología Agrícola; ArgentinaFil: Andorno, Andrea Verónica. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Microbiología y Zoología Agrícola; ArgentinaFil: Cuello, Eliana Marina. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Microbiología y Zoología Agrícola; ArgentinaFil: Cagnotti, Cynthia Lorena. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Microbiología y Zoología Agrícola; Argentin

    GESTIÓN DEL CAPITAL DE TRABAJO Y SU INCIDENCIA EN LA RENTABILIDAD DE LOS RESTAURANTES EN EL DISTRITO DE MIRAFLORES, 2022

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    El estudio tuvo como objetivo investigar el impacto de la gestión del capital de trabajo en la rentabilidad de los restaurantes en el distrito de Miraflores durante el año 2022. Se llevó a cabo una investigación mixta que combinó enfoques cuantitativos y cualitativos, utilizando cuestionarios y entrevistas como principales métodos de recopilación de datos. La muestra consistió en 30 restaurantes seleccionados para representar la diversidad del sector gastronómico en Miraflores. Se consideró que esta muestra era lo suficientemente representativa como para obtener conclusiones significativas sobre la relación entre la gestión del capital de trabajo y la rentabilidad en este contexto. Los datos recopilados fueron analizados meticulosamente utilizando técnicas estadísticas avanzadas y análisis cualitativos para identificar patrones y relaciones entre las variables estudiadas. Los resultados obtenidos proporcionaron una comprensión detallada de cómo las prácticas de gestión del capital de trabajo influyen en la rentabilidad de los restaurantes en Miraflores, y ofrecieron valiosos insights para mejorar la eficiencia operativa y financiera de estos establecimientos en el futuro.The study aimed to investigate the impact of working capital management on the profitability of restaurants in the Miraflores district during the year 2022. A mixed research combining quantitative and qualitative approaches was conducted, using questionnaires and interviews as the main data collection methods. The sample consisted of 30 restaurants selected to represent the diversity of the gastronomic sector in Miraflores. This sample was considered to be sufficiently representative to draw meaningful conclusions about the relationship between working capital management and profitability in this context. The collected data were meticulously analyzed using advanced statistical techniques and qualitative analyses to identify patterns and relationships between the variables studied. The results obtained provided a detailed understanding of how working capital management practices influence the profitability of restaurants in Miraflores and offered valuable insights to improve the operational and financial efficiency of these establishments in the future.Tesi

    Programa psicopedagógico de asertividad para mejorar las relaciones interpersonales en los estudiantes del segundo grado de primaria Institución Educativa N° 10021 " San José " de Chiclayo 2014

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    La Educación Primaria es la base para el desarrollo de las habilidades sociales, porque en ella se amplía la comprensión de sí mismo, y es así como los niños aprenden más cómo funciona la sociedad, desarrollan patrones más complejos de conducta y manejan mejor su propio comportamiento personal y social. En este sentido, la investigación lleva a asumir una connotación trascendental a la promoción de las relaciones interpersonales, específicamente a la asertividad. La investigación lleva por título “Programa psicopedagógico de asertividad para mejorar las relaciones interpersonales en los estudiantes del segundo grado de primaria Institución Educativa N° 10021“San José” de Chiclayo, 2014.” El objetivo general es demostrar que la aplicación del programa psicopedagógico fortalece las relaciones interpersonales, específicamente la asertividad. Los medios y materiales utilizados en la ejecución de la investigación están determinados por las estrategias didácticas utilizadas en el programa: modelado, role playing, reforzamiento o retroalimentación, etc. ■En este orden.,, el desarrollo del programa psicopedagógico permite valorar a la asertividad como una pieza medular en la convivencia social de cada estudiante, con ello se precisa que para tener éxito en el día a día es necesario saber comunicarse adecuadamente, ya sea de modo verbal o no verbal. Estadísticamente queda demostrado en la interpretación de los resultados y en el valor de la prueba t estudent , que se acepta la hipótesis de investigación con una confiabilidad del 99%. Por lo tanto la aplicación del programa psicopedagógico de asertividad mejoró el nivel de las relaciones interpersonales de los estudiantes del segundo grado de primaria institución educativa n° 10021 “San José” de chiclayo- 2014

    Far Ultraviolet Absolute Flux of alpha Virginis

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    We present the far ultraviolet spectrum of alpha Virginis taken with EURD spectrograph on-board MINISAT-01. The spectral range covered is from ~900 to 1080 A with 5 A spectral resolution. We have fitted Kurucz models to IUE spectra of alpha Vir and compared the extension of the model to our wavelengths with EURD data. This comparison shows that EURD fluxes are consistent with the prediction of the model within 20-30%, depending on the reddening assumed. EURD fluxes are consistent with Voyager observations but are ~60% higher than most previous rocket observations of alpha Vir.Comment: 13 pages, 4 figures. Submitted to The Astrophysical Journa

    As áreas naturais protegidas mais conhecidas pelos residentes na Ilha Terceira.

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    A CONSERVAÇÃO DA BIODIVERSIDADE é um objectivo central para a sobrevivência dos seres humanos no Planeta Terra. No entanto enfrentamos problemas e desafios complexos no que se refere à sua operacionalização. Como se conservam as espécies? Que espécies conservar primeiro? Que papel pode cada um de nós desempenhar na sua conservação? O declínio da riqueza e também da abundância de espécies – mesmo de espécies comuns – tem sido bem documentado nos últimos anos (ex. Borges, Gabriel & Fattorini, 2020), surgindo até a ideia de que a extinção de espécies a que assistimos marcaria o início de uma nova época – o Antropoceno, conceito proposto em 2000, e caracterizado pelo efeito significativo e duradouro das actividades humanas no planeta Terra (Crutzen & Stoermer, 2000; Mendes, 2020).info:eu-repo/semantics/publishedVersio

    Far Ultraviolet Spectra of B Stars near the Ecliptic

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    Spectra of B stars in the wavelength range of 911-1100 A have been obtained with the EURD spectrograph onboard the Spanish satellite MINISAT-01 with ~5 A spectral resolution. IUE spectra of the same stars have been used to normalize Kurucz models to the distance, reddening and spectral type of the corresponding star. The comparison of 8 main-sequence stars studied in detail (alpha Vir, epsilon Tau, lambda Tau, tau Tau, alpha Leo, zeta Lib, theta Oph, and sigma Sgr) shows agreement with Kurucz models, but observed fluxes are 10-40% higher than the models in most cases. The difference in flux between observations and models is higher in the wavelength range between Lyman alpha and Lyman beta. We suggest that Kurucz models underestimate the FUV flux of main-sequence B stars between these two Lyman lines. Computation of flux distributions of line-blanketed model atmospheres including non-LTE effects suggests that this flux underestimate could be due to departures from LTE, although other causes cannot be ruled out. We found the common assumption of solar metallicity for young disk stars should be made with care, since small deviations can have a significant impact on FUV model fluxes. Two peculiar stars (rho Leo and epsilon Aqr), and two emission line stars (epsilon Cap and pi Aqr) were also studied. Of these, only epsilon Aqr has a flux in agreement with the models. The rest have strong variability in the IUE range and/or uncertain reddening, which makes the comparison with models difficult.Comment: 25 pages, 6 figures, to be published in The Astrophysical Journa

    2005- 2008 UNLV McNair Journal

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    Journal articles based on research conducted by undergraduate students in the McNair Scholars Program Table of Contents Biography of Dr. Ronald E. McNair Statements: Dr. Neal J. Smatresk, UNLV President Dr. Juanita P. Fain, Vice President of Student Affairs Dr. William W. Sullivan, Associate Vice President for Retention and Outreach Mr. Keith Rogers, Deputy Executive Director of the Center for Academic Enrichment and Outreach McNair Scholars Institute Staf

    Ciudad-territorio sustentable. Procesos, actores y estructuras

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    En los últimos años, los estudios urbanos especializados insisten en que los procesos de urbanización por los que atraviesan los distintos países desarrollados, parecen dejar atrás las explicaciones de la urbanización industrial, han surgido otras construcciones y perspectivas unas más acabadas que otras (Indovina, 1998, la “ciudad difusa”; Dematteis 1998, ciudad sin centros; Nel-lo, 1998 ciudad sin confines, Soja, 2008, la exópolis). En suma se dice que se avanza hacia la urbanización generalizada, ello acaba con la larga trayectoria del funcionamiento y naturaleza de la ciudad moderna, el cambio urbano estructural actual, es nuevamente, consecuencia de la descentralización, difusión, redistribución del desarrollo, del crecimiento y las innovaciones ahora sobre una estructura en el territorio. Ha sido una mutación no sólo empírica sino que ha dado lugar a la confrontación teórica. El sistema urbano jerárquico ha reducido su valor interpretativo porque se han modificado los supuestos en los que se basaban las relaciones de dominio y dependencia de los centros principales, porque se han abaratado los costos de transporte y el efecto de la distancia ya no es una limitante absoluta, ahora los procesos productivos flexibles y descentralizados propician las relaciones técnicas horizontales con lo cual se consiguen economías de escala externas e internas a las empresas en un territorio ampliado y no sólo exclusivamente en la aglomeración económica (Precedo, 2003; Veltz, 1999; Boix, 2002; Camagni, 2005; De Santiago, 2008 y; Garmendia, 2010).El objetivo es examinar dentro de la descentralización del proceso urbano a la ciudad-territorio en América Latina, en particular en México. En contextos urbanos desarrollados se afirma la convergencia urbana con la apertura de las unidades funcionales de los sistemas urbanos donde operan redes e interrelaciones de desarrollo cualitativo en el territorio. América Latina registra evidencias empíricas poco claras, existe alta concentración de aquella economía que contribuye al crecimiento nacional, mientras la población se descentraliza rápidamente. México, es un caso de primacía urbana histórica aunque da paso a la formación de regiones urbanas, mismas que reproducen relaciones polarizadas y escasamente descentralizadas. De manera que, en tanto domine la concentración espacial económica, la ciudadterritorio se podrá presentar en el continente sólo con algunos rasgos en regiones urbanas con mayor desarrollo y crecimiento. Palabras claves: descentralización urbana, sistema urbano, ciudad-territorio

    A Large-Scale Rheumatoid Arthritis Genetic Study Identifies Association at Chromosome 9q33.2

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    Rheumatoid arthritis (RA) is a chronic, systemic autoimmune disease affecting both joints and extra-articular tissues. Although some genetic risk factors for RA are well-established, most notably HLA-DRB1 and PTPN22, these markers do not fully account for the observed heritability. To identify additional susceptibility loci, we carried out a multi-tiered, case-control association study, genotyping 25,966 putative functional SNPs in 475 white North American RA patients and 475 matched controls. Significant markers were genotyped in two additional, independent, white case-control sample sets (661 cases/1322 controls from North America and 596 cases/705 controls from The Netherlands) identifying a SNP, rs1953126, on chromosome 9q33.2 that was significantly associated with RA (ORcommon = 1.28, trend Pcomb = 1.45E-06). Through a comprehensive fine-scale-mapping SNP-selection procedure, 137 additional SNPs in a 668 kb region from MEGF9 to STOM on 9q33.2 were chosen for follow-up genotyping in a staged-approach. Significant single marker results (Pcomb<0.01) spanned a large 525 kb region from FBXW2 to GSN. However, a variety of analyses identified SNPs in a 70 kb region extending from the third intron of PHF19 across TRAF1 into the TRAF1-C5 intergenic region, but excluding the C5 coding region, as the most interesting (trend Pcomb: 1.45E-06 → 5.41E-09). The observed association patterns for these SNPs had heightened statistical significance and a higher degree of consistency across sample sets. In addition, the allele frequencies for these SNPs displayed reduced variability between control groups when compared to other SNPs. Lastly, in combination with the other two known genetic risk factors, HLA-DRB1 and PTPN22, the variants reported here generate more than a 45-fold RA-risk differential

    Canagliflozin and renal outcomes in type 2 diabetes and nephropathy

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    BACKGROUND Type 2 diabetes mellitus is the leading cause of kidney failure worldwide, but few effective long-term treatments are available. In cardiovascular trials of inhibitors of sodium–glucose cotransporter 2 (SGLT2), exploratory results have suggested that such drugs may improve renal outcomes in patients with type 2 diabetes. METHODS In this double-blind, randomized trial, we assigned patients with type 2 diabetes and albuminuric chronic kidney disease to receive canagliflozin, an oral SGLT2 inhibitor, at a dose of 100 mg daily or placebo. All the patients had an estimated glomerular filtration rate (GFR) of 30 to &lt;90 ml per minute per 1.73 m2 of body-surface area and albuminuria (ratio of albumin [mg] to creatinine [g], &gt;300 to 5000) and were treated with renin–angiotensin system blockade. The primary outcome was a composite of end-stage kidney disease (dialysis, transplantation, or a sustained estimated GFR of &lt;15 ml per minute per 1.73 m2), a doubling of the serum creatinine level, or death from renal or cardiovascular causes. Prespecified secondary outcomes were tested hierarchically. RESULTS The trial was stopped early after a planned interim analysis on the recommendation of the data and safety monitoring committee. At that time, 4401 patients had undergone randomization, with a median follow-up of 2.62 years. The relative risk of the primary outcome was 30% lower in the canagliflozin group than in the placebo group, with event rates of 43.2 and 61.2 per 1000 patient-years, respectively (hazard ratio, 0.70; 95% confidence interval [CI], 0.59 to 0.82; P=0.00001). The relative risk of the renal-specific composite of end-stage kidney disease, a doubling of the creatinine level, or death from renal causes was lower by 34% (hazard ratio, 0.66; 95% CI, 0.53 to 0.81; P&lt;0.001), and the relative risk of end-stage kidney disease was lower by 32% (hazard ratio, 0.68; 95% CI, 0.54 to 0.86; P=0.002). The canagliflozin group also had a lower risk of cardiovascular death, myocardial infarction, or stroke (hazard ratio, 0.80; 95% CI, 0.67 to 0.95; P=0.01) and hospitalization for heart failure (hazard ratio, 0.61; 95% CI, 0.47 to 0.80; P&lt;0.001). There were no significant differences in rates of amputation or fracture. CONCLUSIONS In patients with type 2 diabetes and kidney disease, the risk of kidney failure and cardiovascular events was lower in the canagliflozin group than in the placebo group at a median follow-up of 2.62 years
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