[Long lasting symptoms of dyspnea, cough and fatigue after COVID-19 - narrative review of epidemiological studies].

"Long-COVID" is described as long-term effects of SARS‑ CoV‑2 infection that last >4 weeks after the acutephase of infection. The aim of this narrative reviews to evaluate the frequency of occurrence of 3 symptoms often observed in Long-COVID, i.e.

The shape of cells adhering to sulfonated copolymer surfaces.

We studied the shape of L1210 leukaemia cells adhering in a protein-free medium to sulfonated (styrene/methyl methacrylate) copolymer surfaces of two sulfonic group densities, and thus of differing wettability. The use of our image analysis method and the mathematical procedure [Kowalczynska, H.M.

Adsorption characteristics of human plasma fibronectin in relationship to cell adhesion.

Adsorption of human plasma fibronectin (FN) on nonsulfonated and sulfonated polymer surfaces was studied, by using a polyclonal antiserum to FN and the ELISA method. ELISA signal was recorded as a function of FN concentration in solutions. The concentration dependence of FN binding shows the saturation effect in the range 5-10 microg/mL.