The present finding describes an efficient facile approach for the fabrication of nitrogen-doped carbon dots (N-CDs) as a “fluorescent nanoswitch”. Highly fluorescent blue-light-emitting N-CDs have been synthesized via a simpler hydrothermal method using 2,2′-(ethylenedioxy)-bis(ethylamine) and malic acid as the precursors. N-CDs showed excitation-dependent and pH-independent emission along with a quantum yield of ∼25%. The blue fluorescent emission of N-CDs has been selectively “turned off” (quenching of fluorescence (FL)) during the sensing of Cr(VI) with 0.02 μM limit of detection and further been selectively “turned on” (restoration of FL) on sensing ascorbic acid, compared with other metal cations and biomolecules tested. For testing the practical applicability of N-CDs, the switchable reversibility of the fluorescent nanoswitch has been tested for up to four cycles on the basis of FL “on–off–on”. Furthermore, the toxicological test showed the antibacterial effect of the N-CDs on the tested Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli cells. Additionally, these N-CDs can also be used as a fluorescent ink for imaging purposes.

The monograph describes microbial technologies for obtaining of derivatives of terpenoids. Obtaining new derivatives of terpenoids, including artemisinin derivatives with increased antimalarial activity, is an important goal of research in microbial biotechnology and medicinal chemistry.
Dallas: Primedia E-launch LLC, 2016. − 102 p. (ISBN 978-1-68419-775-0)

The monography describes microbial technologies for obtaining of derivatives from a series of nitrogen heterocycles (saturated nitrogen heterocycles, azaarenes and quinolones). It is proposed alternative ways for synthesize substances that are difficult to obtain by the methods of organic chemistry. Microbial technologies of synthesis of organic compounds may find out a practical application in the production of various drugs.
Dallas: Primedia E-launch LLC, 2016. − 130 p. (ISBN 978-1-68419-830-6)

In the process of degradation of 4-methylpyridine by bacterium Аrthrobacter sp. KM-4MP were isolated two metabolites and identified as 4-methylpyridin-2-ol and 8-hydroxy-4-methylidene-1H-cyclopenta[1,2-b:3,4-c']dipyridine-2,3,5,7(4H,6H)-tetrone.
Asian Journal of Microbiology, Biotechnology and Environmental Sciences. 2016. V. 18. N 1. P.75-77.

Poly-Extremotolerant Bacterium Isolated from Reverse Osmosis Reject: an Implication toward Waste Water Management