TY JOUR TI AUTOMATIC OPTICAL DENSITY SENSOR OF MICROALGAE CULTURE ON THE ARDUINO NANO BASIS KW optical density sensor KW Spirulina platensis KW absorption coefficient KW modelling KW plane parallel photobioreactor JO Russian Journal of Biological Physics and Chemisrty AU Chekushkin, A.A. AU Gavrilov, P.E. AU Lelekov, A.S. PY 2019 IS 4 PB Federal State Educational Institution of Higher Education Sevastopol State University