Porous and Close Packed Supramolecular Assemblies from 2,4-Difluoronitrobenzene with Three Different Linkers and an -Butylamine Cap.

A porous structure formed from sheets with cavities and two close packed structures were crystallised from building blocks prepared from 2,4-difluoronitrobenzene, a diamine linker and -butylamine. The porous structure crystallised from a flexible building block prepared using 1,4-diaminobutane as linker. The close packed structures were prepared using either piperazine or 1,4-bis(aminomethyl)benzene as a linker and have less conformational freedom.

[Angioscintigraphy in venous pathology. Comparison of isotope angioscintigraphy and radiologic examination].

Results of vascular radiology and isotope examinations were compared in 48 patients with suspected ileocaval lesions (37 cases) or affections of the veins of the upper limb or superior vena cava (11 cases). Isotopic examination, which can be performed in ambulatory patients, respects normal hemodynamic conditions, is painless, and can be repeated, was found to give valid results, positive correlations with radiological investigation findings being present in 43 cases. Lack of correlation in the remaining 5 patients could have resulted from the period of time elapsed between the two examinations or the techniques employed during each investigation.