[Nucleation of flocculent sludge in anaerobic reactor].

The nucleation of flocculent sludge as seed in a mesophilic Internal Circulation Anaerobic reactor was investigated with a quantitative method proposed by us in this paper. In the 85th days, the average sludge diameter increased from 47.8 microm to 96.

[Investigation of phase morphology of PS/PMMA blend thin film by surface enhanced raman scattering].

Polystyrene/poly (methyl methacrylate) (PS/PMMA) was studied after the thin films were prepared on glass substrate by spin-coating from THF. Raman spectroscopy combined with microscopy was used to obtain information on the morphology and structure of the thin films. From the relative intensities of the peaks around 1 604 and 1 585 cm(-1) due to stretching of benzene rings, and 1 728 cm(-1) due to stretching of C=O for PS and PMMA respectively, the authors could define the composition of the domains in the sea-island-like phase-separated structure in the microscopic image.