Hartmann

Hartmann, Max (Max Hartmann, born 1876), German zoologist, specialist in protistology. He studied and received his doctorate (1901) in Munich. He heads one of the laboratories at the Kaiser-Wilhelm Institute for Biology and is a professor at the University of Berlin. In his early works (before 1914), he studied the morphology of protozoan nuclei, developing the theory of the binucleate nature of the simplest cells, defended the universal presence of centrioles in Protozoa, and established the concept of polyenergid nuclei. Later (1917-22), he worked to determine the ability of flagellates (Eudorina) to reproduce exclusively asexually for extended periods. In 1922-24, he conducted experiments on Stentor and amoebas that demonstrated the possibility of inhibiting asexual reproduction and prolonging individual life through repeated regeneration. More recently, he has been engaged in establishing the relative sexuality of unicellular organisms (using Ectocarpus). H. is the author of "Praktikum d. Bakteriologie und Protozoologie" (together with Kisskalt, Jena, 1915; the protozoological part was translated into Russian as "Pathogenic Protozoa", M.-P., 1923) and "Allgemeine Biologie" (Jena, 1925-28; being translated into Russian). H. edited "Archiv f. Protistenkunde" (Jena, 1902-15).