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The article represents a new production method based on polylactic acid for electronic devices. The originality of the proposed method is the replacement of environmentally unfriendly binders currently used in the manufacture of printed circuit boards with biodegradable polymers. We focused on materials based on renewable raw materials, which can be completely recycled to safe chemicals or reused without deep recycling in chemical or biochemical industries. Also, the proposed material biodegrades naturally into environmental substances. This approach has great potential for practical industrial uses, especially in the light of the “green chemistry” and “circular economy” concepts. Besides, the described materials are a promising base for creating new composite materials for biodegradable electronics.

One of the most popular building blocks for producing organic semiconductors is 2,7-dibromo-9H-carbazole and its derivatives. Building blocks based on 9H-carbazole are among the most expensive building blocks. The article presents new, highly effective, and “green” methods for the synthesis of 2,7-dibromo-9H-carbazole and its derivatives under microwave irradiation. The use of a flow-type microwave reactor significantly reduced the synthesis time. The methods described differ in efficiency, simplicity, performance, and a significant reduction in time compared to classical methods. The research was conducted in accordance with the principles of green chemistry.

Aim: To determine the antiproliferative and cytotoxic activities of Geranium and Erodium species against human cancer and noncancer cell lines, respectively. Methods: Twenty-one species of Geranium and Erodium were extracted and screened against cancerous and noncancerous human cell lines. Results: In a dose-response manner, G. glaberrimum, G. asphodeloides, E. brandianum and E. leucanthum were able, with variable potency, to inhibit cellular proliferation. Except for E. brandianum, all extracts induced cellular autophagy in tumor cells with similar levels to that of rapamycin; but, only E. brandianum induced cellular apoptosis, likely through Bcl2 and BAX protein expressions. Discussion: This is the first study to report the potential antiproliferative effects of ethanol extracts of several Geraniaceae species., Lay abstract Several plant species of the genera Geranium and Erodium were extracted and screened against five tumor cell lines for their potential antitumor activities. Out of the tested species, four showed potential antitumor action against all the tumor cells used. Interestingly, they appeared to achieve their antitumor activities by inducing important cellular defense mechanisms called autophagy and apoptosis. The current work is the first to test the antiproliferative potential of these species against different tumor cells.