Azalea
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Titulações espectrofotométricas de sistemas ácido-base utilizando extrato de flores contendo antocianinas
Considering the attraction of the students' attention by the changes in the colors of vegetable crude extracts caused by the variation of the pH of the medium, the use of these different colors in order to demonstrate principles of spectrophotometric acid-base titrations using the crude extracts as indicators is proposed. The experimental setup consisted of
Química Nova. Publicado em: 2007-08
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2. Desenvolvimento do botão floral de Rhododendron simsii cv. Helmut Vogel : controle ambiental e hormonal
Rhododendron simsii é uma espécie ornamental, tendo uma grande importância comercial. Esta espécie apresenta dormência do botão floral. o objetivo deste trabalho foi estudar o desenvolvimento do botão floral e o tempo médio de antese desta espécie, mais especificamente da cultivar Helmut Vogel, examinando a influência de baixas temperaturas (vernal
Publicado em: 1996
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3. Supercooling in Overwintering Azalea Flower Buds 1
Differential thermal analysis and nuclear magnetic resonance spectroscopy experiments on whole flower buds and excised floral primordia of azalea (Rhododendron kosterianum, Schneid.) proved that supercooling is the mode of freezing resistance (avoidance) of azalea flower primordia. Increase in the linewidth of nuclear magnetic resonance spectra for water upo
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4. Comparative Freezing Patterns in Stems of Cherry and Azalea 1
Ice formation in stems, as determined by means of an electrophoretic mobility technique, occurs much more rapidly in azalea than in sour cherry. The difference is more marked in the bark than in the wood. Disrupting the structure of the tissues completely eliminates differences in freezing patterns, although gross anatomical differences do not appear to acco
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5. Supercooling in Overwintering Azalea Flower Buds: Additional Freezing Parameters 1
Results of calorimetric, nuclear magnetic resonance, and low temperature light microscopic studies on supercooled azalea (Rhododendron kosterianum, Schneid.) floral primordia are reported. Heat release during freezing of the supercooled floral primordia is in the range predicted for supercooled pure water. Spin-lattice and spin-spin relaxation times measured