544 resultados para 1125


Relevância:

10.00% 10.00%

Publicador:

Resumo:

Planktic foraminiferal faunas and modern analogue technique estimates of sea surface temperature (SST) for the last 1 million years (Myr) are compared between core sites to the north (ODP 1125, 178 faunas) and south (DSDP 594, 374 faunas) of the present location of the Subtropical Front (STF), east of New Zealand. Faunas beneath cool subtropical water (STW) north of the STF are dominated by dextral Neogloboquadrina pachyderma, Globorotalia inflata, and Globigerina bulloides, whereas faunas to the south are strongly dominated by sinistral N. pachyderma (80-95% in glacials), with increased G. bulloides (20-50%) and dextral N. pachyderma (15-50%) in interglacials (beneath Subantarctic Water, or SAW). Canonical correspondence analysis indicates that at both sites, SST and related factors were the most important environmental influences on faunal composition. Greater climate-related faunal fluctuations occur in the south. Significant faunal changes occur through time at both sites, particularly towards the end of the mid-Pleistocene climate transition, MIS18-15 (e.g., decline of Globorotalia crassula in STW, disappearance of Globorotalia puncticulata in SAW), and during MIS8-5. Interglacial SST estimates in the north are similar to the present day throughout the last 1 Myr. To the south, interglacial SSTs are more variable with peaks 4-7 °C cooler than present through much of the early and middle Pleistocene, but in MIS11, MIS5.5, and early MIS1, peaks are estimated to have been 2-4 °C warmer than present. These high temperatures are attributed to southward spread of the STF across the submarine Chatham Rise, along which the STF appears to have been dynamically positioned throughout most of the last 1 Myr. For much of the last 1 Myr, glacial SST estimates in the north were only 1-2 °C cooler than the present interglacial, except in MIS16, MIS8, MIS6, and MIS4-2 when estimates are 4-7 °C cooler. These cooler temperatures are attributed to jetting of SAW through the Mernoo Saddle (across the Chatham Rise) and/or waning of the STW current. To the south, glacial SST estimates were consistently 10-11 °C cooler than present, similar to temperatures and faunas currently found in the vicinity of the Polar Front. One interpretation is that these cold temperatures reflect thermocline changes and increased Circumpolar Surface Water spinning off the Subantarctic Front as an enhanced Bounty Gyre along the south side of the Chatham Rise. For most of the last 1 Myr, the temperature gradient across the STF has been considerably greater than the present 4 °C. During glacial episodes, the STF in this region did not migrate northwards, but instead there was an intensification of the temperature gradient across it (interglacials 4-11 °C; glacials 8-14 °C).

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Currently, the management recommendations for asian soybean rust (ASR) has been based on the application of protective fungicides mixed with triazoles and stronilurins. Thus, this study aimed at assessing whether the increased productivity provided by the application of protective fungicides is due solely to the fungicidal action of the product or some physiological changes in the plant and which the latter would be. The experiment was conducted from March to July 2015 at the experimental station of Udi Research and Development in Uberlândia-MG, with the cultivar 97Y07 RR. The experimental design chosen for this study was comprised of a randomized block with four replications and 16 treatments: check, fluxapyroxad + pyraclostrobin (116.55 + 58.45 g ha-1), azoxystrobin + benzovindiflupir (90 + 45 g ha-1), trifloxystrobin + prothioconazole (60 + 70 g ha-1), tebuconazole + picoxystrobin (100 + 60 g ha-1), picoxystrobin + cyproconazole (60 + 24 g ha-1), mancozeb (1125 g ha-1), azoxistrobina + tebuconazole + difenoconazole (60 + 75 + 120 g ha-1), azoxystrobin + tebuconazole + difenoconazole + chlorothalonil ( 60 + 120 + 75 + 1440 g ha-1), and mistures fluxapyroxad + pyraclostrobin + mancozeb, azoxystrobin + benzovindiflupir + mancozeb, trifloxystrobin + prothioconazole + mancozeb, tebuconazole + picoxystrobin + mancozeb, picoxystrobin + cyproconazole + mancozeb, azoxystrobin + tebuconazole + difenoconazole + mancozeb, and azoxystrobin + benzovindiflupir + chlorothalonil, from the aforesaid doses. The first application of the treatments occurred in R1, in the absence of symptoms. The number of applications, intervals and the use of adjuvants were performed according to the recommendations by manufacturers. The variables analyzed were: disease severity, concentration of chlorophylls and carotenoids, photosynthetic rate (A), transpiration rate (E), stomatal conductance (gs), internal carbon concentration (Ci), instantaneous efficiency in water use (A/E), intrinsic water use efficiency (A/gs), and carboxylation efficiency (A/C). With these data collected, this study set to date the progress curve of each variable (AUPC). At the end of the crop cycle, the average of pods per plant was quantified, grain per pod, productivity and weight of 1,000 grains. It was concluded that: the addition of mancozeb to fluxapyroxad + pyraclostrobin, azoxystrobin + benzovindiflupir, trifloxystrobin + prothioconazole and tebuconazole + picoxystrobin potentiated the ASR control; adding mancozebe to the mixture azoxystrobin + benzovindiflupir provided better control of the disease compared to the addition of chlorothalonil; mancozeb amounts to AUPC concentration of photosynthetic pigments and when added to axozystrobin + tebuconazole + difenoconazole, increases the AUPC for total chlorophyll concentration, as well as when chlorothalonil was added; mancozeb added to the mix fluxapyroxad + pyraclostrobin raised the AUPC for A/Ci and A/gs, increasing the W1,000G and crop productivity; the addition of protectors similarly reflected on the productivity of culture.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

This material is based upon work supported by the National Science Foundation through the Florida Coastal Everglades Long-Term Ecological Research program under Cooperative Agreements #DBI-0620409 and #DEB-9910514. This image is made available for non-commercial or educational use only.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

En el presente trabajo de tesis se realizó un estudio comparativo de los alimentos consumidos por niños menores de dos años de los cantones de Cuenca y Nabón, a partir de datos obtenidos por medio de encuestas de consumo (recordatorios de 24 horas) en el año 2008 por el proyecto de investigación.Alimentación, Nutrición y Salud VLIR-IUC & Universidad de Cuenca. La información de las encuestas fue tabulada, clasificada, procesada y homologada con el fin de obtener recetas promedio para la estimación de su contenido nutricional. Además, las recetas más comúnmente elaboradas por los cuidadores de infantes menores de 2 años fueron preparadas para determinar su consistencia, contenido energético y densidad energética, y estos parámetros fueron comparados con las directrices de la Organización Mundial de la Salud (OMS) para la alimentación de niños amamantados. La información de las encuestas fue tabulada, clasificada, procesada y homologada con el fin de obtener recetas promedio para la estimación de su contenido nutricional. Además, las recetas más comúnmente elaboradas por los cuidadores de infantes menores de 2 años fueron preparadas para determinar su consistencia, contenido energético y densidad energética, y estos parámetros fueron comparados con las directrices de la Organización Mundial de la Salud (OMS) para la alimentación de niños amamantados. Entre los resultados obtenidos, se observó que la consistencia de las recetas de Cuenca fue mayor que las de Nabon. En cuanto a las directrices de la OMS, del total de recetas preparadas se encontró que 17 recetas (77%) fueron energéticamente adecuadas; sin embargo, desde el punto de vista nutricional, la diversidad de ingredientes a incluir en estas preparaciones no fue la adecuada.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

El presente trabajo tiene como alcance la elaboración de un plan estratégico de recursos humanos para ser implementado en la empresa STRACON GyM durante el periodo comprendido entre los años 2015 y 2019. Como base metodológica no se contempla la recolección de muestras desde la perspectiva del enfoque cuantitativo, pues se carece de dichos elementos de medición para formular las hipótesis del planeamiento. En ese sentido, es conveniente utilizar la metodología cualitativa para entregar un documento de tipo consultoría que aborde una problemática inicial (necesidad de cumplir los objetivos estratégicos de la empresa) desde la gestión de personas, y que proponga, con suficiente base teórica, las estrategias de recursos humanos apropiadas para la consecución de las metas del negocio. Se complementará este enfoque utilizando el método Delphi, que permitirá predecir de manera sistemática los efectos de la implementación del plan de recursos humanos propuesto. De esta manera, los cuestionarios formulados a los expertos en identificación de las necesidades del negocio al interno de la organización, volverán a ser consultados por estos mismos para establecer una conceptualización firme sobre la problemática a abordar en la gestión de personas dentro de STRACON GyM, y de esa manera sustentar, sobre la base de los modelos teóricos consultados, las mejores propuestas que compondrán el plan referido. Para una mejor precisión conceptual, se utilizará el término Gestión Humana en lugar de Recursos Humanos, puesto que considera que las personas que contribuyen al logro de los éxitos empresariales no son meramente recursos y mucho menos gastos, sino seres humanos con talentos, a los que hay que dirigir en el ámbito laboral, de acuerdo con estrategias y tácticas de gestión de personas para aprovechar al máximo sus capacidades y desarrollar sus potencialidades, ya que son ellos los que generan y sostienen el valor en una organización.  

Relevância:

10.00% 10.00%

Publicador:

Resumo:

El objetivo de este estudio es diseñar y validar el instrumento Escala de Expectativas de Futuro en la Adolescencia (EEFA). Se analizó una muestra compuesta por 1125 participantes de ambos sexos procedentes de la provincia de Cádiz, con edades comprendidas entre los 11 y 15 años. A partir del Análisis Factorial Exploratorio (AFE), realizado con la submuestra 1 (n=551), se identificaron cuatro factores: Expectativas económico/ laborales, Expectativas académicas, Expectativas de bienestar personal y Expectativas familiares. Mediante un Análisis Factorial Confirmatorio (AFC), usando la submuestra 2 (n=574), se confirmó la estructura factorial de la escala, cuyo modelo presentaba un buen ajuste. Los análisis de los ítems y de fiabilidad demostraron una aceptable consistencia interna de la escala. Para la obtención de otras evidencias de validez, los datos obtenidos mediante el instrumento EEFA se contrastaron con otros instrumentos que evalúan autoestima y satisfacción vital, esperando obtener relaciones positivas entre los mismos. Se concluye que el instrumento EEFA, compuesto por 14 ítems, posee propiedades psicométricas adecuadas, considerándose un instrumento válido para evaluar las expectativas de futuro que presentan los adolescentes.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

In the months of January 2001 and 2002, female cachara Pseudoplatystoma fasciatum were selected during their first and second gonadal maturation (2 years and 7 months old and 3 years and 7 months old, respectively) with an of oocyte diameter of 937.5 mum (82.5% with central nuclei and 17.5% with peripheral nuclei). Nine females in first maturation received two doses of carp pituitary extract (CPE), 0.5 mg/kg and 5.0 mg/kg; seven received two doses of human chorionic gonadotropin (hCG), 5 and 10 IU/g; five received doses of 0.5 CPE mg/kg and 5 hCG IU/g (CPE+hCG); and four received 0.9% saline (saline). Nine females from CPE and seven from hCG presented oocytes with the same diameter at the moment of oocyte release (100% with germinal vesicle breakdown and fertilization rate of 53.44 +/- 18.3 and 54.81 +/- 11.8%; larvae number of 165,330 +/- 94.1 and 158,570 +/- 20.6, respectively). The five females from CPE+hCG did not respond to the hormonal treatment. The four females from the saline group did not ovulate. In January 2002, 6 of 15 selected females that were going through the second reproductive cycle received CPE (five received hCG and four received saline), showing oocyte diameters similar to the ones in the first maturation. At stripping, CPE females had an oocyte diameter of 1062.5 mum (the hCG females had oocyte diameters ranging from 937.5 to 1125.0 mum; fertilization rates of 56.08 +/- 30.9 and 81.90 +/- 17.3%; 364,547 +/- 244 and 633,129 +/- 190, larvae, respectively). The fertilization rates and larvae number were higher in the second gonad maturation, both for CPE and hCG. (C) 2004 Elsevier B.V. All rights reserved.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Combined media on photographic paper. 40" x 30" (shaped) Private Collection

Relevância:

10.00% 10.00%

Publicador:

Resumo:

A presente dissertação desenvolve um projeto que visa analisar o papel da ilustração enquanto meio de comunicação e de que forma as ilustrações, juntamente com a linguagem verbal, podem contribuir favoravelmente para o processo de aprendizagem das crianças. A análise teórica refletiu-se num trabalho prático que visa responder a uma necessidade comum e atual das crianças e dos familiares que as acompanham. No presente trabalho, foi criado um rolo de papel higiénico ilustrado que serve como guia de instruções para as crianças em fase de transição da fralda para a sanita. Este produto temático é ainda inexistente no mercado de vendas de papel higiénico sendo que a sua investigação e desenvolvimento poderá ser uma mais valia.