Homogeneous nucleation rates of water at temperatures between 240 and 270 K were measured in a laminar flow diffusion chamber at ambient pressure and helium as carrier gas. Being in the range of 10(2)-10(6) cm(-3) s(-1), the experimental results extend the nucleation rate data from literature consistently and fill a pre-existing gap. Using the macroscopic vapor pressure, density, and surface te...

Homogeneous nucleation theory for binary mixtures is developed as a two-component extension of the classical multistate kinetics rate theory. A matrix formulation, based on the stochastic model of Shugard and Reiss @J. Chem. Phys. 65, 2827 ~1976!#, provides the framework for solving the strongly coupled two-dimensional flux network associated with tracking the evaporation and growth kinetics of...

1 In this work, we have investigated in mammalian cells how microtubule nucleation at 2 centrosome and Golgi apparatus are coordinated, using genetic ablation of three g-TuRC 3 binding proteins -AKAP450, Pericentrin and CDK5Rap2and the PLK4 inhibitor centrinone. We 4 show that centrosomal microtubule nucleation is independent of Golgi activity whereas the 5 converse is not true: nucleation on t...

Kinetic equations describing nucleation on active centers are solved numerically to determine the number of supercritical nuclei, nucleation rate, and the number density of nuclei for formation both of droplets from vapor and also crystalline phase from vapor, solution, and melt. Our approach follows standard nucleation model, when the exhaustion of active centers is taken into account via the ...

The square gradient approximation is used to calculate the surface tension between two phases of differing density in a charged colloidal suspension, and the results are compared with experimental and theoretical evidence from various colloidal systems. The nucleation rate of a colloidal liquid cluster from a metastable colloidal gas is estimated using a version of classical nucleation theory. ...

This paper describes the oriented nucleation of calcite controlled by self-assembled monolayers (SAMs) of ω-terminated alkanethiols (HS(CH2)nX) supported on metal films. The effect of the chemistry and geometry of the organic surfaces was surveyed by using different functional groups (X ) CO2, SO3, PO3, OH, N(CH3)3, CH3) and different supporting metals (Au and Ag). Optical microscopy, SEM with ...

The impact of fouling on the performance Reverse Electrodialysis operated with highly concentrated brine is a poorly investigated area. In this work, propensity and stability Ion Exchange Membranes (IEMs), developed by Fujifilm Manufacturing Europe BV (The Netherlands), under condition seawater brine. IEMs was depicted determination Gibbs energy barrier based-on Classical Nucleation along Theor...

OBJECTIVE To test the hypothesis that the extraocular muscles (EOMs) of patients with infantile nystagmus have muscular and innervational adaptations that may have a role in the involuntary oscillations of the eyes. METHODS Specimens of EOMs from 10 patients with infantile nystagmus and postmortem specimens from 10 control subjects were prepared for histologic examination. The following varia...

Inhomogeneous systems where stable and metastable regions coexist are common in nature. Phase separation and coarsening [1], aggregation [2], wetting [3], dendritic growth [4], and growth of breath figures [5] are just a few examples of such systems. Typically, the stable phase grows into the metastable phase according to complicated kinematic rules. However, in certain cases such as adsorption...

A new heterogeneous ice nucleation parameterization that covers a wide temperature range (−36 to−78 C) is presented. Developing and testing such an ice nucleation parameterization, which is constrained through identical experimental conditions, is important to accurately simulate the ice nucleation processes in cirrus clouds. The ice nucleation active surface-site density (ns) of hematite parti...