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Showing 1 to 20 of 152 for “"water uptake"”.
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DEHYDRATION AND MICROBIAL IMPACTS ON WATER UPTAKE AND POSTHARVEST QUALITY OF CUT LILY
Water plays a vital role in postharvest physiology of cut flowers. There are several factors affecting water uptake of cut flowers, including aspiration into the xylem and bacterial occlusion. While numerous studies have focused on water balance with cut flowers, few of them have focused on cut …
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Soil drying cycles in the succulent Karoo : different rooting systems and water uptake
In the semi-arid Succulent Karoo water is one of the most limiting resources, and plants that survive in the area require competitive water-use strategies suited to long periods of drought. Over the years much emphasis has been put on mechanisms that allow for the competitive success of water-use …
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Impedance spectroscopy study of water uptake and long-term degradation of immersed polyimide coatings
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1994.
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Understanding the role of deep root water uptake in Amazon hydroclimate using modeling and observational approaches
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
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Investigations on Dry Beans (Phaseolus Vulgaris L.): Microstructure, Processing, and Antinutrients (Phytic Acid, Tanning, Enzyme Inhibitors)
… features of a typical legume. Initial water uptake rates during soaking were characteristic of each variety. The hilum and micropile along with a loosely arranged cell structure on the raphe-side of the hilum, a deeply-grooved hilar fissure, and a narrow tracheid bar were the most …
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Synthesis, crosslinking and characterization of disulfonated poly(arylene ether sulfone)s for application in reverse osmosis and proton exchange membranes
… (RO) membranes for application in fuel cell and water purification respectively were developed by synthesis and crosslinking of disulfonated biphenol-based poly (arylene ether sulfone)s (BPS). Crosslinking is a prospective option to reduce the water swelling and improve the dimensional stability …
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Model-based analysis of climate change impacts on the productivity of oak-pine forests in Brandenburg
… production of all selected tree species. But, in water-limited regions this positive net primary production trend is dependent on the length of drought periods which results in a larger uncertainty regarding future forest productivity. One of the regions with the highest uncertainty of net primary …
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Non-invasive monitoring of water and solute fluxes in a cropped soil
Although the influence of root water uptake on solute transport is commonly recognized as important, it has barely been studied throughout the literature. However, plants take up a big amount of the infiltrating water and therefore they influence water flow patterns in the soil and concurrently …
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TiO2-doped Ionic Polymer-Metal Composite Actuator
… actuators are capable of complex deformation in water and air and they are soft actuation materials with promising applications in wide range of fields, such as robotics and medical devices. Although fabrication techniques on the polymer doped with metal oxides for IPMCs have been developed, …
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Proton Exchange Membrane Fuel Cell Systems Based on Aromatic Hydrocarbon and Partially Fluorinated Disulfonated Poly(Arylene Ether) Copolymers
… Lastly, the basic PEM parameters such as water uptake, proton conductivity, and methanol permeabilities were controlled and presented as tunable properties as a function of molecular structure. This was achieved by in-situ control of chemical composition. The direct methanol fuel cell …
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Transport and Structure in Fuel Cell Proton Exchange Membranes
… compared. Species transport (protons, methanol, water) in hydrated membranes was found to correspond with the water-self diffusion coefficient as measured by pulsed field gradient nuclear magnetic resonance (PFG NMR), which was used as a measure of the state of absorbed water in the membrane. …
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Environmental Influences on Tree-driven Karst Bedrock Physical Weathering
… fractures, where they can expand due to water uptake or generate forces on rock in response to wind gusts, these processes have not been investigated in temperate karst regions until now. I monitored forces at the root-rock interface for an American elm and Hackberry tree between …
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Polymeric and Polymer/Inorganic Composite Membranes for Proton Exchange Membrane Fuel Cells
… nanocomposite hybrid membranes show lower water uptake and conductivity than Nafion and neat poly(arylene ether sulfone)s copolymers, but in some cases have similar or even slightly improved DMFC performance due to the lower methanol permeability. These membranes also show advantages for …
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Effects of Thermal Treatments on Perfluorosulfonate Ionomer Membranes
… of side chains and the nature of the membrane. Water uptake analysis has been performed on annealed membranes, and the result shows that water uptake decreases with increasing degree of crystallinity.
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Stock plant nutrition and stem cutting water relations during propagation of four woody nursery crops
… Stem cutting survival and rooting, midday xylem water potential, and basal water uptake all generally increased with increasing medium moisture level. Incidence of cutting basal rot was not directly related to medium moisture level, but was related to species and growth stage of the stock plant. …
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Coupled Behaviour of Soil and Plant Water Dynamics: Effects of Vegetation Cover, Soil Type and Fire Disturbance
Plant and soil water dynamics are crucial for terrestrial carbon uptake, agriculture and human livelihoods. As plants primarily rely on water uptake from the soil, soil and plant water dynamics are strongly coupled over most of the land surface. Soil and plant water dynamics also play a crucial …
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Regulation of Seat-patch Water Potentials in Anurans
Decades of research on water exchange in frogs have assumed that blood osmotic potential drives water uptake. However, more recent reports have suggested an intermediate control of the water potential partially separate from the osmotic potential of blood. Some reports have speculated that …
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Role of Water in the Formation, Transformation and Fate of Secondary Organic Aerosol
Particle-phase water is the most abundant atmospheric aerosol constituent, yet the importance of water for the formation, transformation and fate of secondary organic aerosol (SOA) remains not fully characterized. In order to address this knowledge gap, this thesis explores the role of water in SOA …
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