منابع مشابه
Molecular buoyancy and osmotic equilibrium.
Measurements of osmotic equilibrium of colloidal solutions, ranging from 170,000 to 20,000 in molecular weight, show that the negative buoyancy of the solute molecules is additive to the osmotic pressure. Seen together with earlier measurements of positive buoyancy of oil suspensions, these data confirm that the osmotic interaction between solute and solvent at equilibrium is purely a force-cou...
متن کاملEffects of buoyancy and of magnetic forces on osmotic pressure.
The commonly held view that the mechanism of osmotic pressure is a mass action effect at the semi-permeable membrane has recently been challenged by several authors who propose that solute molecules, in bombarding the free surface of the solution, subject the solvent to a negative hydrostatic pressure. Thus, they argue that osmotic pressure is a purely hydrostatic phenomenon. Experimental findi...
متن کاملPredicting the buoyancy, equilibrium and potential swimming ability of giraffes by computational analysis.
Giraffes (Giraffa camelopardalis) are often stated to be unable to swim, and while few observations supporting this have ever been offered, we sought to test the hypothesis that giraffes exhibited a body shape or density unsuited for locomotion in water. We assessed the floating capability of giraffes by simulating their buoyancy with a three-dimensional mathematical/computational model. A simi...
متن کاملComparison of physiological and molecular responses of Melissa officinalis L. to osmotic stress imposed by drought and salinity with iso-osmotic potential in hydroponic culture
This study was performed to compare some physiological and molecular responses of lemon balm to osmotic stress imposed by drought and salinity stresses with equal osmotic potential in hydroponic culture. Growing lemon balm plants in hydroponic culture were treated with drought and salinity stress using polyethylene glycol 6000 and sodium chloride for 14 days. Then, seedlings were sampled to eva...
متن کاملNon-equilibrium Molecular Dynamics
Statistical mechanics provides a well-established link between microscopic equilibrium states and thermodynamics. If one considers systems out of equilibrium, the link between microscopic dynamical properties and nonequilibrium macroscopic states is more difficult to establish [1,2]. For systems lying near equilibrium, linear response theory provides a route to derive linear macroscopic laws an...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1972
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.69.2.301