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Showing 1 to 20 of 249 for “"Transpiration"”.
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Transpiration and the water relations of barley
Measurements of evapotranspiration, leaf water potential and stomatal conductance were made with a barley crop over the spring and summer of 1979. From these measurements a model of transpiration from barley was developed. Predictions of the model were compared with Bowen ratio measurements of …
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Scalable Synthetic Trees for Transpiration-Powered Hydraulic Systems
… uses of synthetic trees that replicate the transpiration mechanisms of natural trees. The first chapter provides an in-depth explanation of how natural trees utilize hydraulic mechanisms to draw water from the soil, through their roots, and up to their leaves, sustaining hydration through …
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Diurnal Variations in Transpiration and Root Metabolism in Maize
Made available in DSpace on 2014-12-10T17:12:29Z (GMT). No. of bitstreams: 1 6612370.pdf: 3382131 bytes, checksum: 6d97f8226e5471b98d9573a76fd57b88 (MD5) Previous issue date: 1966
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Photosynthesis and transpiration in a dry-land Pinus radiata forest
… and abiotic regulation of photosynthesis and transpiration at the leaf and canopy scales in a dry-land Pinus radiata D. Don forest by combining gas exchange measurements with biophysical process-based models of photosynthesis, radiation transfer, and soil water balance. Responses of …
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Transpiration cooling of a cylinder in crossflow : an experimental investigation
Experiments have been carried out in air on a two-inch diameter porous cylinder to determine the effect of air injection on heat transfer from a cylinder in crossflow. The Reynolds number based on cylinder diameter and free stream conditions was varied from 31,200 to 119,000 for the dimensionless …
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The use of transpiration in a precision temperature-controlled enclosure
Thesis: B.S., Massachusetts Institute of Technology, Department of Mechanical Engineering, 1984
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Energy conversion using thermal transpiration : optimization of a Knudsen compressor
… that use the nanoscale phenomenon of thermal transpiration to pump or compress a gas. Thermal transpiration takes place when a gas is in contact with a solid boundary along which a temperature gradient exists. If the characteristic length scale is on the order of, or smaller than, the …
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Determining transpiration efficiency of eight grain sorghum lines [Sorghum bicolor (L.) Moench]
Transpiration efficiency (TE) is defined as total biomass produced per unit of water transpired. Improvement of TE means maximizing crop production per unit of water used. The objectives of the study were to examine, at the leaf level and the whole plant level, the variation in TE for sorghum …
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Theoretical Analysis of Transpiration Cooling of a Liquid Rocket Thrust Chamber Wall
<p>Transpiration cooling is a process that could reduce the overall weight of the cooling system of an actively cooled thrust chamber wall of a liquid rocket engine by up to 50% when compared to other active cooling techniques, increasing the thrust to weight ratio of the rocket engine. In this …
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Transpiration Electrokinetic Power Generation and Zinc Ion Battery for Autonomous Leak Detection
… leak detection: an electrochemically enhanced transpiration driven electrokinetic power generator (TEPG) and a wick activated zinc air battery. Carbon nanotube paper was implemented as a TEPG using an active zinc anode to harness energy from moisture wicking and electrochemical processes, …
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Quantifying the Sensitivity of Land-Surface Models to Hydrodynamic Stress Limitations on Transpiration
Evapotranspiration is a major forcing function of Earth's climate, providing the link for the soil-plant-atmosphere continuum. Stomata conductance, which governs transpiration, also provides the link between latent heat flux and carbon uptake rates. Current land-surface models couple stomata …
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Soybean transpiration, vegetative morphology, and yield components following simulated and actual insect defoliation
… defoliation for one basic physiological process, transpiration; (2) to determine if soybean response to defoliation varies between simulation methods; and (3) to elucidate the general effects of defoliation at full bloom on soybean growth, development, yield, and yield components;Water loss from …
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Determining the influence of transpiration on soil moisture pathways using electrical resistivity imaging
… how soil moisture pathways are affected by daily transpiration using time-lapse electrical resistivity imaging (ERI) on a ponderosa pine and the surrounding soil during the growing season. By comparing sapflow measurements to the ERI data, we find that high periods of sapflow within the diel cycle …
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Direct Transpiration and Naphthalene Uptake Rates for a Hybrid Poplar Based Phytoremediation System
Direct transpiration rates and plant uptake of naphthalene by a hybrid poplar phytoremediation system located in Oneida, Tennessee were determined using hydrologic and groundwater concentration data. Water table recession analysis techniques were employed to determine direct transpiration rates …
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