999 resultados para Altas temperaturas criticas
Resumo:
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Resumo:
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Resumo:
Pós-graduação em Anestesiologia - FMB
Resumo:
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Resumo:
Pós-graduação em Agronomia - FEIS
Resumo:
Pós-graduação em Fisioterapia - FCT
Resumo:
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Resumo:
A presente invenção refere-se a composições vanstoras à base de óxidos metálicos, mais particularmente à base de diáxido de estanho (SnO~ 2~) com a adição de óxidos metálicos dopantes, preferencialmente óxido de cobalto (CoO), pentóxido de nióbio (Nb~ 2~O~ 5~) e triáxido de cromo (Cr~ 2~O~ 3~), para conformação de e blocos cerâmicos varistores cujas propriedades eletrónicas não-óhmicas finais são independentes das dimensões dos corpos cerâmicos. A independência das propriedades não-óhmicas em relação às dimensões do corpo permite que uma mesma composição varistora seja utilizada em aplicações para baixas, médias e altas tensões.
Resumo:
A presente invenção está relacionada com a construção genética de uma nova linhagem da levedura Saccharomyces cerevisiae, dita IQAr/45-1, destinada a fermentação de matérias primas açucaradas, contendo altas concentrações de açúcar com alta produtividade de etanol e a temperaturas maiores que 37<198>C. Esta levedura resiste a concentrações de ácido lático superiores a 3,0 até 4,0 g/l no meio durante a produção de etanol. Trata-se de uma levedura geneticamente marcada e que não apresenta nenhuma exigência nutricional decorrente de sua construção sendo capaz de crescer a temperaturas elevadas.
Resumo:
Ligas que compreendem quantidades de metais expressas como porcentagens em peso, incluídas dentro dos seguintes intervalos: 8-20% de Al; 1-20% de Ag; 0-2% (de preferência 0,5-1%) de um metal minoritário (de preferência Co); e o resto até 1005 de Cu. As suas transformações martensíticas têm lugar a temperaturas superiores e aproximadamente 200°C, e próximas aos 400°C em alguns casos, sendo habituais as próximas aos 300°C. Possuem maior resistência à corrosão que as ligas convencionais. São úteis em novos campos de aplicação industrial como, por exemplo, no controle de temperatura em óleos de alto ponto de ebulição e em situações de grande desprendimento de calor por reações exotérmicas ou por grande roçamento.
Resumo:
The use of sprinkler-irrigation and/or high levels of fertilization in upland rice can increase plant height and hence plant lodging. Lodging can be controlled by using growth regulators, in order to reduce plant height. The objective of this study was to evaluate the efficiency of plant growth regulators applied at the stage of panicle primordium differentiation on the reduction of plant height and the impact on grain yield and its components of upland rice cultivar Primavera, under sprinkler irrigation. The experiment was arranged in a 3x4 factorial randomized blocks design with four replications. Treatments consisted of: mepiquat chloride and trinexapac-ethil applied at doses 9, 50, 100, and 200 mg a.i. ha-1, and paclobutrazol at doses of 0, 25, 50, and 100 mg a.i. ha-1. Plant growth regulators reduced rice plant height; increasing doses of regulators reduced upland rice grain yield and its components; trinexapac-ethyl was the most harmful to rice grain yield.In this study, it was not identified the dose of growth regulator that allied reduction in plant height and did not cause decrease in rice yield.
Resumo:
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Resumo:
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Resumo:
In Brazil, phosphorus availability is one factor that that more limit yield of upland rice under rainfed system. Then, better understanding of cultivars development at phosphorus soil fertilization is very important in the production systems making this more sustainable. The objective was to evaluate the influence of phosphorus doses applied to the soil over the root length, root and shoot dry matter, concentration and content of macronutrient and zinc in shoot and root as well as the efficiency of nutrient uptake per meter root of upland cultivars of intermediate and modern groups. The experiment was carried out in greenhouse conditions in a completely randomized design in factorial scheme 4 x 4. Treatments were four levels of P fertilization applied at the soil (0, 50, 100 and 200 mg dm(-3) of P) and four upland rice cultivars (Maravilha - modern group, IAC-201, IAC-202 and Carajas - intermediate group). There is increase in phosphorus availability in the soil with increasing levels of P fertilization. Under low phosphorus availability, cultivars of the intermediate group have better shoots and root system development in relation to the modern cultivar group. Level of phosphorus affected nutrients contents in shoots and root system of upland rice cultivars. The increasing phosphorus fertilization increased uptake of nutrients per meter of root; and although under higher phosphorus availability there was a greater root growth, in low phosphorus availability root growth was greater at the expense of shoot growth.
Resumo:
The objective of this study was to evaluate the coverage of spray droplets on coffee plants as well as their deposition using a sprayer with and without adaptation of an auxiliary branch for tall plants. The experiment was conducted following a randomized block design with six treatments and four replications to evaluate the percentage of coverage for the spraying liquids in water sensitive paper fixed at four quadrants and two heights (lower and upper) of the plants, and the spray deposit with metallic marker (MnSO4) on sheets in the same positions of the water sensitive paper in two spray volumes (450 and 750 L h(-1)). The experiment was conducted in October 2011 in the town of Patroc nio-MG, and the experimental plots consisted of 30 plants of Catua IAC-99, with approximately 12 years of age and average height of 3.50 meters. The experiments were conducted following a randomized block design with six treatments and four replications to evaluate the coverage and deposition, in two spray volumes (450 and 750 L ha(-1)). Leaves were collected in four positions and also at the top four in the lower canopy. The results of the evaluations were analysed statistically by F test and for comparison of means by Tukey test at 5% probability. The auxiliary branch installed at the rear of the equipment is the most suitable when compared to use of equipment without this feature or installed in the front of the equipment. Furthermore, the application volume of 450 L ha(-1) results in coverages and deposits of spraying liquids equivalents to volume of 750 L ha(-1), considered sufficient according to the parameters evaluated.