[Evaluation of a cell block method in cytological diagnostics].

Background: Cell block procedures have now become an established part of cytological diagnostics. In this study a cytoblock technique based on the plasma-thrombin method was evaluated.

Materials And Methods: In total 389 consecutive cytological samples were initially analyzed by the classical procedure and then by the cell block technique.

Optimized enrichment and purification of ferrocyanide for 13/12C and 15/14N isotope analysis of aqueous solutions.

The occurrence of ferrocyanide, Fe(CN)(6)(4-), in aqueous environments is of concern, since it is potentially hazardous. For tracing the source of ferrocyanide in contaminated water we developed a method that relies on the determination of the stable isotope ratios of (13)C/(12)C and (15)N/(14)N of this complexed cyanide (CN) after precipitating it as cupric ferrocyanide, Cu(2)[Fe(CN)(6)] · 7H(2)O. The precipitate was combusted and the isotope ratios were determined by continuous flow isotope ratio mass spectrometry.

Stable carbon ((12/13)C) and nitrogen ((14/15)N) isotopes as a tool for identifying the sources of cyanide in wastes and contaminated soils--a method development.

The occurrence of iron-cyanide complexes in the environment is of concern, since they are potentially hazardous. In order to determine the source of iron-cyanide complexes in contaminated soils and wastes, we developed a method based on the stable isotope ratios (13)C/(12)C and (15)N/(14)N of the complexed cyanide-ion (CN(-)). The method was tested on three pure chemicals and two industrials wastes: blast-furnace sludge (BFS) and gas-purifier waste (GPW).

[Metastatic deposits of carcinoma in the choroid (author's transl)].

The authors report on choroid metastatic deposits from primary tumors of other organs with regard to a survey of the literature and personal observations. 85% of the choroid secondary growths occur after breast cancer in women with an average latency of 3 1/2 years. The ophthalmological appearances and the fluorescence-angiographical phenomena are discussed with regard to the differential diagnosis of melanoma and haemangioma of the choroid.