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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 83 for “"Osmotic pressure"”.
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Osmotic pressure measurements of phase-separating protein solutions
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1990.
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ANOMALOUS TRANSPORT:_FROM THEORIES ABOUT OSMOTIC PRESSURE TO A NEW APPROACH IN THE FRAMEWORK OF DYNAMICAL SYSTEMS
… like the Van't Hoff or Morse equations for osmotic pressure, have been observed to fail in many circumstances and this has prompted the development of a quantity of models trying to describe osmotic processes in non-classical regimes. Recently some authors tried to modify the classical laws …
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The physical mechanism of osmosis and osmotic pressure--a hydrodynamic theory for calculating the osmotic reflection coefficient
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1991.
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Inverse Monte Carlo simulation of biomolecular conformation and coarse-grained molecular modeling of chondroitin sulfate conformation, titration, and osmotic pressure
The first part of this thesis is concerned with the solution structure determination problem. Whereas many biomacromolecules, such as proteins, can be adequately characterized by a single conformation in solution, numerous other important molecules (e.g., nucleic acids, carbohydrates, and …
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The Effect of a Second Stress on Growth of Tetrahymena Pyriformis
… by a second stress, using temperature change and osmotic pressure change as stress factors.</p> <p>Growth rate of T. pyriformis was determined under standard conditions of temperature and osmotic pressure (29°C and 100 milliosmols). A single stress consisting of a decrease in temperature to 20°C …
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Investigating the calcium wave and actin dynamics at Drosophila egg activation
… bodies and meiotic spindles, I show that osmotic pressure acts as an initiation cue for the calcium wave and downstream processes, including the resumption of cell cycle and the dispersion of the translational repression sites. I further show that aquaporin channels, together with external …
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Plasma proteins and cardiac oedema
… proteins which results in a fall in the colloid osmotic pressure of the blood. This depletion is due principally to malnutrition, and it is suggested that cases of cardiac oedema should be given diets containing the maximum amount of protein compatible with the digestive functions of the patients …
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Electrocatalytically induced liberation of mineral matter from coal
… coal has been developed which is based on the osmotic pressures that occur when electrical double layers overlap. In this technique, coal is exposed to ferric ions in an acidic medium which causes the coal to lose electrons and become positively charged, thereby establishing ionic double layers …
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Modeling Of Membrane Solute Mass Transfer In Ro/nf Membrane Systems
… were used to describe mass transfer in a low pressure RO integrated membrane system. Inorganic and organic solute and water mass transfer coefficients were systematically investigated for dependence on membrane surface properties and NOM mass loading. Inorganic MTCs were accurately described …
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Improving product release from saccharomyces cerevisiae and kluyveromyces lactis by pretreatment for cell wall weakening and selective product release
… to ultrasound or passing through the high pressure homogenisation (HPH). Pretreatments were selected for their ability to weaken the yeast cell wall, rather than to permeabilise the cell. This allowed product release to be concentrated into the disruption step only, not distributed between …
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Utilization of High Milk-Protein Powder in Bulk Starter Production and Manufacture of Gouda Cheese
… barrier. The driving force is the hydrostatic pressure gradient required to overcome the osmotic pressure against which the water flow occurs. It can be used as concentration or fractionation operation to produce two liquid streams of different compositional characteristics: the retentate or …
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Star-shaped Polyelectrolytes
… and high arm numbers, leading to a pronounced osmotic pressure inside the stars due to the presence of counterions. The osmotic pressure opposes further deprotonation, resulting in a decreased acidity. The osmotic coefficient decreases with increasing arm number, indicating higher counterion …
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The dynamic properties of concentrated charge stabilized suspensions
… are examined. Equilibrium elastic moduli and osmotic pressures are characterized. Rheological and osmotic pressure determinations of the location of the order/disorder phase transition are found to agree. Yielding and catastrophic shear thinning where the suspension viscosity decreases …
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Development of Photoelastic Gelatin Spheres for Force Measurement and Visualization in Granular Media
… hydration was controlled by manipulating the osmotic pressure across the sphere boundary. It is likely that smaller forces could be observed with more sensitive equipment.
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Osmotic mass exchangers for power generation and energy recovery : analysis and analogy to heat exchangers
… Fundamentally, an RO system is a membrane-based osmotic mass exchanger. Another type of membrane-based osmotic process, a subset of forward osmosis (FO) called pressure retarded osmosis (PRO), currently exhibits promise for making desalination more energy efficient and is receiving attention in …
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Genetic Algorithm Based Optimization of Baffle Positions in a Forward Osmosis Draw Channel
… a significant if not dominant source of overall osmotic pressure loss across the membrane. Accurate modeling of ICP effects is therefore very critical for accurate Computational Fluid Dynamic (CFD) modeling of asymmetric membranes. A related, dilutive effect known as external concentration …
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Assessment of performance and efficiency of membrane distillation for treatment of impaired water and brine with high scaling potential
Water recovery is limited in pressure-driven membrane processes such as reverse osmosis (RO) and nanofiltration (NF) due to increase in scaling risk and osmotic pressure of the feed water with concentration. Membrane distillation (MD) is an emerging thermally-driven membrane desalination processes …
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Aggregation Effects on the Rheological, Sedimentation, and Drying Behavior of Colloidal Silica Suspensions
… behavior indicative of a dispersed system. Their osmotic pressure was well described by the modified Carnahan-Starling equation. Further salt additions produced weakly flocculated suspensions. SiO$\sb2$ suspensions in toluene displayed the strongest shear thinning behavior, highest apparent …
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Biodegradable, Liquid-Filled, Spherical Capsules With Pre-Determined Burst Times
… shell thickness, radius of the capsule, core osmotic pressure and the membrane tensile strength. Elastoplastic and failure characterization of PLGA was conducted as a function of hydration under uniaxial and biaxial stretch and by a novel “beach ball” inflation technique. The presence of small …
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