aerosol formation due to ions in the atmosphere is not well understood, although it seems to play an important role in cloud formation. the ions in the atmosphere can enhance cloud formation and can increase nucleation as well as impeding the evaporation from the surfaces of the droplets. recently there has been some experimental work to find the relation between ions concentrations and cloud i...

2014 It is shown that liquid 4He can usually be overpressurized only 10-2 bars above the melting pressure. This value suggests that the nucleation takes place on the walls of the cell, not in the bulk liquid as calculated previously. Further theoretical effort on this problem is called for. In the presence of carefully degased graphite we confirm that the barrier to the nucleation disappears, a...

We find that profilin contributes in several ways to Cdc42-induced nucleation of actin filaments in high speed supernatant of lysed neutrophils. Depletion of profilin inhibited Cdc42-induced nucleation; re-addition of profilin restored much of the activity. Mutant profilins with a decreased affinity for either actin or poly-l-proline were less effective at restoring activity. Whereas Cdc42 must...

[1] We have studied sulfuric acid aerosol nucleation in an atmospheric pressure reaction chamber using a 580 MeV electron beam to ionize the volume of the reaction chamber. We find a clear contribution from ion‐induced nucleation and consider this to be the first unambiguous observation of the ion‐effect on aerosol nucleation using a particle beam under conditions that resemble the Earth’s atmo...

We present the longest series of measurements so far (2 years and 7 months) made with an Ion-DMPS at the SMEAR II measurement station in Hyytiälä, Southern Finland. We show that the classification into overcharged (implying some participation of ion-induced nucleation) and undercharged (implying no or very little participation of ion-induced nucleation) days, based on Ion-DMPS measurements, agr...

016101-1 Many chemically active, hazardous, and toxic substances have a high dipole moment, and they interact strongly with the charged particles and molecular ion clusters. A new nucleation model considering the contribution of the dipole-charge interaction to the ion-induced nucleation rates is developed, with the dipole moment of the condensing monomers as a new parameter. It is shown that i...

(Hales, J. R. S., eds.), pp. 169-173, Raven Press, New York Nedergaard, J., Alexson, S. & Cannon, B. (1980) Am. J . Physiol. 239, C208Z2 16 Nedergaard, J., Connolly, E., NBnberg, E. & Mohell, N. (1984) Biochem. Soc. Trans. 12, 393-396 Nedergaard, J., Connolly, E. & Cannon, B. (1986) in Brown Adipose Tissue (Trayhurn, P. & Nicholls, D. G., eds.), Edward Arnold, London, in the press Raasmaja, A.,...

The previous work of Professor W. G. Burgers and Dr. A. J. Bogers is used to develop a mechanism of strain-induced martensitic nucleation, involving two intersecting shear systems. We distinguish between strain-induced nucleation and stressassisted nucleation, the latter involving the same sites and embryos as does the regular spontaneous transformation. The strain-induced nucleation, on the ot...

A method is presented for calculating ion-induced nucleation rates. Whereas classical ion-induced nucleation theory makes the approximation that small ionic clusters are charged droplets whose properties equal their values for the bulk liquid, the method presented gives a nucleation rate in the form of a summation over discrete cluster properties. The summation converges rapidly around the crit...