Necessidades de irrigação suplementar em soja nas condições edafoclimáticas do Planalto Médio e Missões, RS.

Este trabalho foi conduzido com a finalidade de estimar as necessidades estocásticas de irrigação suplementar por aspersão na cultura da soja (Glycine max L. Merrill), nas regiões agroecológicas do Estado do Rio Grande do Sul, denominadas de Planalto Médio e Missões. As necessidades foram simuladas em relação à combinação entre locais, épocas de semeadura, níveis de manejo da irrigação e entre níveis de ocorrência . As necessidades de irrigação suplementar foram máximas na semeadura de 15 de outubro, e os menores valores foram encontrados na semeadura de 15 de dezembro; as necessidades de irrigação suplementar foram maiores nas condições agroecológicas das Missões quando comparadas com as do Planalto Médio; as lâminas de irrigação suplementar estimadas aumentaram à medida que o nível de risco diminuiu

Incorporation Of Nanocrystals With Different Dimensionalities In Hybrid Tio2/p3ht Solar Cells

We investigate the effect of TiO2 nanoparticles-nanospheres and nanorods-inserted in the poly(3-hexylthiophene) (P3HT) matrix of TiO2?P3HT inverted hybrid solar cells. X-ray diffraction, high-resolution transmission electron microscopy, small-angle x-ray scattering, photoluminescence, and photoelectrochemical experiments were employed to investigate the structure, morphology, and photoactivity of TiO2 nanoparticles modified with 2-thiopheneacetic acid, mixed or not with P3HT. Both TiO2 nanospheres and TiO2 nanorods presented a good dispersion in the polymer matrix. The incorporation of TiO2 nanospheres and nanorods has improved the photocurrent generation, and devices with efficiency values up to 1.35% were obtained. Our results reveal that the nanoscale morphology enables an enhanced interfacial area for exciton dissociation. 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Clinical changes in cats submitted to experimental hyperthyroidism

A relação do hipertireoidismo experimental com parâmetros clínicos foi avaliada em gatos machos e fêmeas, intactos e mantidos em estado hipertireóideo por um período de 42 dias. Os parâmetros estudados foram consumo diário de água e ração, débito urinário, o volume fecal, peso corporal, temperatura corporal, coloração de membranas mucosas, palpação de linfonodos superficiais, palpação da glândula tireóide, pulso femoral, auscultação cardíaca e respiratória, freqüência cardíaca e respiratória e palpação abdominal. Correlacionou-se as variáveis com os níveis de T3 total, T4 livre e total. O excesso dos hormônios tireoidianos acompanhou aumento da freqüência cardíaca, polifagia, polidipsia, perda de peso e aumento do volume fecal nos gatos estudados.The interrelation between experimental hyperthyroidism andclinical changes was studied in adult intact cats kept under hyperthyroidic state for 42 days. Clinical aspects evaluated were dairy food and water intake, urine output and fecal volume, body weight, temperature, mucous membranes colour, palpable lymphnodes, thyroid gland palpation, abdominal palpation, and cardiac and respiratory frequencies. These characteristics were correlated with free and total T4 and total T3 serum concentrations. Excessive circulant thyroid hormone levels resulted in increased cardiac frequency, polyuria, polidipsia, weight loss and increased fecal volume in the studied cats