Slot-Die-Printed Two-Dimensional ZrS Charge Transport Layer for Perovskite Light-Emitting Diodes.

Liquid-phase exfoliation of zirconium trisulfide (ZrS) was used to produce stable and ready-to-use inks for solution-processed semiconductor thin-film deposition. Ribbon-like layered crystals of ZrS were produced by the chemical vapor transport method and were then exfoliated in three different solvents: dimethylformamide, ethanol, and isopropyl alcohol. The resulting ZrS dispersions were compared for stability and the ability to form continuous films on top of the perovskite layer in light-emitting diodes with the ITO/PEDOT:PSS/MAPbBr/2D-ZrS/LiF/Al structure.

[In vitro synthesis of alpha-fetoprotein by individual hepatocytes and microcolonies of human hepatocytes].

Alpha-fetoprotein (AFP) produced by individual hepatocytes and hepatocyte microcolonies was detected with microelectrophoresis-precipitation in polyacrylamide gel. Hepatic cells of 6--13-week-old human embryos were cultivated in vitro for 2 to 5 days. 23 of 28 individual cells, and 89 of 91 microcolonies, built up of 2--35 cells, were demonstrated to produce AFP within the range of 70--800 pg per cell.

[Synthesis and localization of alpha fetoprotein in liver regeneration in mice].

Typical mature hepatocytes constituting not over several per cent of the total amount of preserved hepatocytes served as the principal site of the alpha-fetoprotein (AFP) localization in the liver of mice regenerating after the CCl4 poisoning or partial hepatectomy. Morphologically they failed to differ from the principal mass of hepatocytes and retained an antigen of the bile capillaries on the surface. A change id to the dynamics of the AFP level in the animal serum.

[Ultramicromethod of determining antigens].

A method of alpha-fetoprotein (AFP) ultramicrodetection, permitting to reveal up to 10(--8) mg of AFP with its concentration of 1--2.10(--6) mg/ml was suggested. The antigen ic concentrated in a capillary tube during the electrophoresis in polyacrylamide gel.