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Osmosis is the movement of water through a semipermeable membrane according to the concentration gradient of water across the membrane, which is inversely proportional to the concentration of solutes. Semipermeable membranes, also termed selectively permeable membranes or partially permeable membranes, allow certain molecules or ions to pass ...
Jan 17, 2012 · In an Artemisia tridentata stand, HR maintained soil water potentials above the threshold at which nutrient diffusion stops (Ryel et al., 2002), and Matzner & Richards (1996) suggested that the ability of A. tridentata shrubs to maintain nutrient uptake under very dry soil conditions (< −5 MPa) was enhanced by release of water through HR, although they did not directly test it.
- Iván Prieto, Cristina Armas, Francisco I. Pugnaire
- 271
- 2012
- 17 January 2012
Nov 30, 2023 · Total body water volume is largely regulated by the pituitary hormonal effect of arginine vasopressin acting on vasopressin type 2 receptors in renal collecting ducts to retain or release water. In critical illness, arginine vasopressin deficiency predisposes patients to dilutional hyponatremia if the infused volume is larger than necessary or excessively prescribed as ‘electrolyte-free ...
- Thomas Woodcock
Because cells primarily use diffusion to move materials within the cytoplasm, any increase in the cytoplasm’s density will inhibit the movement of the materials. An example of this is a person experiencing dehydration. As the body’s cells lose water, the rate of diffusion decreases in the cytoplasm, and the cells’ functions deteriorate.
Oct 1, 2023 · The in vitro release of YARA was evaluated using Franz diffusion cells with a receptor phase consisting of phosphate-buffered solution (100 mM, pH 7.2) under constant stirring (200 RPM) at 37.0 ± 0.5 °C [[47], [48], [49]]. A cellulose membrane (15,000 Da cut, Spectrum Chemical Mfg. Corp., Gardena, CA) was placed between the recipient and donor compartments, and 500 μL of NP-YARA (4 mg) in ...
Jul 1, 2021 · Aquaporin 2 has an essential role in water reabsorption in the collecting duct. Here, the authors discuss novel insights in the field of aquaporin 2 regulation and how they might have implications ...
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Jan 1, 2015 · Many controlled-release systems commercially available now are based on membrane technology. These systems consist of a core containing the drug surrounded by a thin polymer membrane and transport of drug through membrane occurs by a solution-diffusion mechanism. Drug molecules first dissolve in the membrane and then diffuse from interior part ...
