Dietary intervention with green dwarf banana flour (Musa sp AAA) prevents intestinal inflammation in a trinitrobenzenesulfonic acid model of rat colitis

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Nitrogen and potassium fertilization of 'Nanicao' banana (Musa AAA Cavendish subgroup) under irrigated and non-irrigated conditions

A field experiment was carried out in São Paulo State, Brazil, with the objective of investigating the response of 'Nanicao' banana (Musa AAA Cavendish subgroup) to nitrogen and potassium fertilization under irrigated and non-irrigated conditions during two crop seasons. The effects of cropping on some soil chemical properties were also investigated. A split-plot design was used with irrigation (micro-sprinkler) and no irrigation applied to main plots, and a combination of four rates of N (0, 200, 400 and 800 kg N ha-1) and K (0, 300, 600 and 900 kg K2O ha-1) as the sub-plot treatments. Irrigation caused a significant increase in fruit yield and determined the response to N and K fertilizers. In spite of a high level of exchangeable K, a positive response to K application was observed on the plant crop in non-irrigated plants. Fruit yield was impaired by N application in the plant crop (1st cycle). A positive response to N application was observed in the 2nd cycle. Soil pH decreased with increasing N rates. Exchangeable K was significantly reduced due to crop exhaustion.

Avaliação da atividade preventiva da dieta enriquecida com banana verde (banana 'Nanica' Musa sp AAA) e de seus efeitos sinérgicos com a prednisolona no modelo de colite ulcerativa induzida por ácido trinitrobenzenosulfônico em ratos

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Avaliação de genótipos de bananeira em Botucatu-SP

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Caracterização físico-química dos frutos de genótipos de bananeira produzidos em Botucatu-SP

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Crescimento e produção de genótipos de bananeiras em clima subtropical

O presente trabalho teve como objetivo avaliar as características de crescimento e o potencial produtivo de genótipos de bananeira em Botucatu/SP. Foram avaliadas características de crescimento, tais como altura de planta, circunferência do pseudocaule, número de folhas e número de dias entre o florescimento e a colheita. Estas medidas foram realizadas na emissão da inflorescência. Foram mensuradas também as características de produção, como peso do cacho, número de frutos, peso médio dos frutos, produtividade, número de pencas; peso, número, comprimento e diâmetro dos frutos da 2a penca. O delineamento adotado foi o inteiramente casualisado, com 11 tratamentos (genótipos), cinco repetições e duas plantas úteis por parcela experimental. Os genótipos que apresentaram melhor desempenho agronômico, dentro de cada grupo genômico, foram 'Grand Naine'(AAA), 'Thap Maeo' (AAB) e 'Fhia 01' (AAAB).

Correlaçôes fenotípicas entre características de produção e crescimento em genótipos de bananeira

The correlations between the characters seen in experimental trials are generated by genetic and environmental factors and are estimated for the purpose of measuring the change in a character when the selection is practised in another. The objective was to correlate bunch weight with characteristics of growth and production of 4 genomic groups of banana: 'Nanicao-IAC-2001', 'Grand Naine', 'Caipira' and 'Nam' ( AAA); 'Ma a', 'Thap Maeo', 'Prata Ana' and 'Prata Zulu' (AAB), 'Fhia 01', 'Fhia 18', 'Prata Grauda' and 'Maca Tropical' (AAAB) and 'Figo Cinza' (ABB), Botucatu, Brazil. Some growth characteristics were evaluated such as: plant heights, the pseudostem circumference, number of leaves, number of days between planting and flowering, number of days between flowering and harvest and number of days from planting to harvest. These characteristics were measured at the flowering time. The production characteristics such as the bunch weigth, number of fruits, average weigth of the fruits, productivity, number of hands and weight, number, length and diameter of the fruits of the 2(nd) hand. The correlations between the characteristics studied varied for each genotype, but they all showed significant correlation between the bunch weight and the characteristics fruit weigth and productivity. The correlations involving all genotypes were predominantly positive and significant.

Desempenho agronômico de bananeiras micropropagadas em Botucatu-SP

O trabalho teve como objetivo avaliar o desempenho agronômico de cultivares de bananeira 'Prata-anã', 'Maçã' e 'Nanicão', no município de Botucatu-SP. As mudas provenientes de micropropagação foram aclimatadas em estufa durante noventa dias e, posteriormente, plantadas no campo, conforme as recomendações técnicas para a cultura. Foram avaliadas características de crescimento, como número de dias do plantio à colheita, número de folhas ativas, altura de plantas e diâmetro do pseudocaule, medidas na época de emissão da inflorescência. Também foram mensuradas características de produção, entre as quais o número de frutos, diâmetro, comprimento e peso da segunda penca, peso total das pencas e número de frutos por cacho, na época da colheita. Os resultados obtidos evidenciaram que o ciclo cultural médio variou com as cultivares, sendo de 416 dias, contados do plantio à colheita para a cv 'Nanicão', que foi a mais precoce, seguido da 'Prata-anã' (434 dias) e da 'Maçã' (437 dias). As três cultivares apresentaram produtividade estimada no primeiro ciclo (planta-mãe) de 30,56 t.ha-1; 19,50 t.ha-1 e 14,37 t.ha-1, respectivamente, para 'Nanicão', 'Prata-anã' e 'Maçã'. Houve correlação positiva entre algumas características de crescimento e produção.

Experimental Investigation into the Characteristics of In-Pipe Leak Noise in Plastic Water Filled Pipes

This paper presents an experimental investigation of the characteristics of leak noise in plastic water-filled pipes. An experimental set-up was designed to identify the physical mechanisms of leak noise generation. Possible mechanisms include cavitation and turbulence. The experiments show that cavitation is not responsible for leak noise generation and clearly indicate that turbulence is the main mechanism, at least in the experiments conducted. An alternative experimental set-up was also designed to identify the characteristics of leak noise spectra and to investigate how the spectra are affected by the leak size and the leak flow velocity. A number of different hole sizes (leaks) starting from 1 mm diameter, increasing progressively every 0.5 mm until a size of 4 mm diameter were tested for different jet velocities and an empirical model that describes this behaviour is proposed.

Lingüística de interações moleculares

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

MANUTENÇÃO DE FOLHAS ATIVAS em BANANEIRA-'NANICÃO' POR MEIO do MANEJO DAS ADUBAÇÕES NITROGENADA E POTÁSSICA E da IRRIGAÇÃO

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

An investigation of cadmium(II) and nickel(II) adsorption by chitin graft covolymer

Chitin hydrogels of poly(vinylpyrrolidone) (VP) were prepared by means of the hydrogen peroxide graft copolymerization process. The effect of the VP grafted chain on water diffusion through the biopolymer was studied. Fourier transform infrared spectra of the VP-g-Ch showed an increase in the intensities of the hydroxyl and carbonyl stretching bands indicating a reduction in the hydrogen bonding of chitin. An investigation was undertaken regarding the adsorption of nickel(II) and cadmium(II) ions from aqueous solutions by the VP grafted chitin and the effects of the grafting degree on the Cd2+ and Ni2+ sorption were studied. The Cd2+ and Ni2+ adsorption equilibrium data correlate well with the Freundlich equation. The results indicate that the Ch-g-VP graft copolymer under investigation is a potentially powerful chelating material that can be employed for Ni2+ and Cd2+ ion removal from wastewater effluents. (C) 2004 Wiley Periodicals, Inc.