The existence of a semipermeable layer in grass seeds has been extensively reported, yet knowledge of its influence on tests for seed viability and vigor that depend upon measurement of electrical conductivity (EC) is limited. This study determined the presence and location of the semipermeable layer, and its relation to seed viability and vigor assessment, in seeds of four important grass spec...

We use molecular dynamics simulations to study osmotically driven transport of water molecules through hexagonally packed carbon nanotube membranes. Our simulation setup comprises two such semipermeable membranes separating compartments of pure water and salt solution. The osmotic force drives water flow from the pure-water to the salt-solution compartment. Monitoring the flow at molecular reso...

The colloidal osmotic and hydrostatic pressure of chronic subdural hematomas were measured with a manometer in 35 patients. Manometric measurement showed an increase in the hematoma fluid cor responding to 5% of the total hematoma volume. The maximum colloidal osmotic pressure of the hematoma fluid, as measured with a transducer, was 23 ± 12 mmHg (mean ± standard deviation). Hemor...

      Hard gelatin capsule filled with acetaminophen, osmotic agent (sorbitol), a release promoter (sodium dodecyl sulfate), coated with a semipermeable cellulose acetate membrane containing a hydrophobic plasticizer (castor oil) and sealed with white bees wax plug was designed. When placed in the sink water penetrates the membrane, dissolves the osmotic agent and increases the osmotic pressure...

The effectiveness of using semipermeable membrane in preterm infants to reduce transepidermal losses Gurgel EPP, Caetano JÁ, Lopes MVO, Rolim KMC, Almeida PC, Magalhães FJ, Barreto JO Rev Esc Enferm USP 2011; 45(4):817-23 www.ee.usp.br/reeusp/ The effectiveness of using semipermeable membrane in preterm infants to reduce transepidermal losses* O r ig in a l a r t ic l e EFICÁCIA DO USO DE MEMBR...

Pineapple (Ananas comosus) is a horticultural species of the Bromeliaceae family high socioeconomic interest, widely cultivated around world. The multiplication pineapple seedlings in field can be time-consuming, requiring significant labor investment. objective this study was to evaluate performance continuous and temporary immersion systems micropropagation scale-up species. Shoots were obtai...

Direct measurements have been made of the net volume flow through cellulose membranes, due to a difference in concentration of solute across the membrane. The aqueous solutions used included solutes ranging in size from deuterated water to bovine serum albumin. For the semipermeable membrane (impermeable to the solute) the volume flow produced by the osmotic gradient is equal to the flow produc...

Iron-reducing bacteria can transfer electrons to ferric iron oxides which are barely soluble at neutral pH, and electron-shuttling compounds or chelators are discussed to be involved in this process. Experiments using semipermeable membranes for separation of ferric iron-reducing bacteria from ferric iron oxides do not provide conclusive results in this respect. Here, we used ferrihydrite embed...

Osmosis is the movement of solvent across a membrane induced by a solute-concentration gradient. It is very important for cell biology. Recently, it has started finding technological applications in the emerging processes of Forward Osmosis and Pressure-Retarded Osmosis. They use ultrathin and dense membranes supported mechanically by much thicker porous layers. Until now, these processes have ...