Psychrometry
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Resfriamento evaporativo: estudo do potencial de sua aplicação no Brasil / Evaporative cooling: study of the potential of her application in Brazil
O objetivo deste trabalho é a validação de um método matemático que será utilizado para o mapeamento das regiões brasileiras com potencialidade de utilizar sistemas de resfriamento evaporativo no condicionamento de ambientes. O resfriador evaporativo ensaiado apresenta capacidade para condicionamento de um ambiente de até 50 m2. São sobrepostos mapa
Publicado em: 2006
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2. Estimation of Osmotic Gradients in Soybean Sieve Tubes by Quantitative Autoradiography: Qualified Support for the MÜnch Hypothesis 1
An attempt was made to evaluate Münch's hypothesis of osmotically generated pressure flow in soybean (Glycine max L.) sieve tubes from velocity measurements and calculations of pressure potentials and sieve tube resistances. Pressure potential was estimated from values for water potentials and osmotic potential. Leaf water potential measurements were made b
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3. Pressure Probe and Isopiestic Psychrometer Measure Similar Turgor 1
Turgor measured with a miniature pressure probe was compared to that measured with an isopiestic thermocouple psychrometer in mature regions of soybean (Glycine max [L.] Merr.) stems. The probe measured turgor directly in cells of intact stems whereas the psychrometer measured the water potential and osmotic potential of excised stem segments and turgor was
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4. Direct Measurement of Turgor and Osmotic Potential in Individual Epidermal Cells 1: Independent Confirmation of Leaf Water Potential as Determined by in Situ Psychrometry
The pressure probe, which is routinely used to measure the turgor potential (Ψp) of individual epidermal cells in Tradescantia virginiana (L.), has also been used to sample small volumes of vacuolar fluid from these same cells (as low as 0.02 nl) for measurement of cellular solute (osmotic) potential (Ψs) in a micro freezing point osmometer. The water pote
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5. Root Xylem Embolisms and Refilling. Relation to Water Potentials of Soil, Roots, and Leaves, and Osmotic Potentials of Root Xylem Sap1
Embolism and refilling of vessels was monitored directly by cryomicroscopy of field-grown corn (Zea mays L.) roots. To test the reliability of an earlier study showing embolism refilling in roots at negative leaf water potentials, embolisms were counted, and root water potentials (Ψroot) and osmotic potentials of exuded xylem sap from the same roots we
American Society of Plant Physiologists.
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6. Origin of Growth-Induced Water Potential 1: Solute Concentration Is Low in Apoplast of Enlarging Tissues
We developed a new method to measure the solute concentration in the apoplast of stem tissue involving pressurizing the roots of intact seedlings (Glycine max [L.] Merr. or Pisum sativum L.), collecting a small amount of exudate from the surface of the stem under saturating humidities, and determining the osmotic potential of the solution with a micro-osmome
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7. Water Relations of Seed Development and Germination in Muskmelon (Cucumis melo L.) 1: I. Water Relations of Seed and Fruit Development
Total water potential (ψ), solute potential, and turgor potential of field-grown muskmelon (Cucumis melo L.) fruit tissue (pericarp) and seeds were determined by thermocouple psychrometry at 5-day intervals from 10 to 65 days after anthesis (DAA). Fruit maturity occurred between 44 and 49 DAA, and seed germination ability developed between 35 and 45 DAA. Pe