Photo correlation spectroscopy

The shape and size of micellar particles can be determined using transmission electron microscopy (TEM) and photo-correlation spectroscopy (PCS). The size distribution of the hard-core RMs measured by PCS was confirmed by TEM technique the hard-core RMs micelles of carbonate-sulfonate had mean particle sizes between 10 and 20 nm while the neutral sulfonate formed micelles with a diameter of 2 nm (Chinas-Castilio and Spikes, 2000). 

Aharoni and coworkers characterized 59 Denkewalter s cascade macromolecules 4 by employing classical polymer techniques viscosity determinations, photo correlation spectroscopy (PCS), and size exclusion chromatography (SEC). It was concluded that at each tier (2 through 10) these globular polymers were, in fact, monodisperse and behaved as nondraining spheres. The purity of these molecules was not ascertained and the dense packing limits were either not realized or simply not noted. 

These processes must be monitored to confirm that the second polymer does not emerge as a separate particle type. Re-nucleation, producing a crop of new particles, may be detected by progressive determination of particle size and comparing actual with the theoretical size calculated on the basis of constant particle number. This is easier to do in those processes where the monomer for the second polymer is added slowly at a steady and known rate and samples can be taken at regular time intervals for particle-size determination by electron microscopy, photon correlation spectroscopy or by disc centrifuge photo-sediometry. For particles prepared by non-aqueous dispersion... 

FCS fluorescence correlation spectroscopy PCH photon counting histogram TCSPC time correlated single photon counting MCS muiti-channei scaiar APDiavaianche photodiode PMT photo-mutipiiertube PCi peripherai component interconnect. 

The second observational correlation results from the detailed photo-spheric quantitative spectroscopy by Mdndez et al. (1987), which allows to determine the position of CSPN in the log g, log Te -plane with high precision. By transformation of evolutionary tracks into this plane stellar masses M/MQ and radii R/R0 can be read off directly. The log g, log Te diagram of CSPN can also be used to investigate how the strength of stellar winds depends on the stellar parameters. This is done in Fig. 14, which reveals clearly that the more massive objects closer to the Eddington limit have observable wind features. 

However, the work of List et al. [48], based on PL and IR spectroscopy, questioned this picture demonstrating a correlation between the green emission and the presence of keto defects [82] on the PF chain. These can be statistically introduced during the synthetic procedure or arise as the result of photo-oxidation. 

Liang J-J, Hawthorne FC, Swainson IP (1998) Triclinic muscovite X-ray diffraction, neutron diffraction and photo-acoustic FTIR spectroscopy. Can Mineral 36 1017-1027 Libowitzky E (1999) Correlation of 0-H stretching frequencies and 0-H...0 hydrogen bond lengths in minerals. MhChemie 130 1047-1059... 

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