Otto Mangold [5] was an early-twentieth-century embryologist who specialized in the development of amphibian embryos. A major emphasis of his research was refining the concept of the organizer [6], now referred to as embryonic induction [7]. He was born on 4 November 1891 in Auenstein, Germany, and came from what Viktor Hamburger [8], a colleague and personal acquaintance, described as ?peasant...

This study focuses on the fossil beetles assigned previously to the family Hydrophilidae described from the localities in the southern part of the Upper Rhine Graben: Brunstatt (France, Alsace) and Kleinkems (Germany, Baden-Württemberg) (both dated ca. to Eocene-Oligocene boundary, 34 Ma). The identity of Escheria convexa Förster, 1891 is fixed by the designation of its neotype, the species is ...

The genus name Rhodococcus Zopf 1891 was created to accommodate two species of red pigment (lipochrome)-producing bacteria. However, the genus name Rhodococcus Hansgirg 1884 had already been applied to an algal taxon. The wording of the 1975 and subsequent revisions of the Code dealing with bacteria/prokaryotes is such that the name Rhodococcus Zopf 1891 is illegitimate, despite the fact that i...

Alfred Henry Sturtevant studied heredity in fruit flies in the US throughout the twentieth century. From 1910 to 1928, Sturtevant worked in Thomas Hunt Morgan?s research lab in New York City, New York. Sturtevant, Morgan, and other researchers established that chromosomes play a role in the inheritance of traits. In 1913, as an undergraduate, Sturtevant created one of the earliest genetic maps ...

The cytochrome P450 2C19 (CYP2C19) enzyme plays an important role in the metabolism of many commonly used drugs. Relatively little is known about CYP2C19 inhibitors, including compounds of natural origin, which could inhibit CYP2C19, potentially causing clinically relevant metabolism-based drug interactions. We evaluated a series (N = 49) of structurally related plant isoquinoline alkaloids for...

The monotypic genera Epiplagiops Blanchard, 1943 and Tetragrapha Brauer and Bergenstamm, 1891 are revised. Both are invalidated and synonymized with Chetogena Rondani, 1856. Their type-species, Epiplagiops littoralis Blanchard, 1943 and Tetragrapha tessellata Brauer and Bergenstamm, 1891, are studied, redescribed, illustrated, and transferred to Chetogena. A lectotype is designated for T. tesse...

Two rare documents associated with the Indian Museum and the Indian Marine Survey for the administrative year April 1890 to March 1891 have been examined and found to have nomenclatural consequences for malacostracan crustaceans. Even though they constitute available published works according to the International Code for Zoological Nomenclature, these reports have rarely been cited. Dating the...

The genus Delenda Croissandeau, 1891 is revised and redescribed. The taxonomic position of the Delenda frivaldszkyi Reitter, 1893 is discussed, and its species status is resurrected. Delenda carthago Croissandeau, 1891, and D. frivaldszkyi Reitter, 1893 are redescribed. One new species D. rhodopensis sp. n. is described. 

At the end of a brilliant paper' published in 1922 from one of the world's foremost laboratories of physiology-a contribution which, in one swift motion, gathered together the best of nineteenth century material and laid the foundation for the modern study of arterial elasticity-there appeared the following careless citation: "Moens, 'Die Pulskurve', Leiden. 1878. p. 90." In one form or another...

Izydor Kopernicki’s 1887–1891 letters to Seweryn Udziela
 The paper is an edition of 11 and 6 postcards sent by Kopernicki Udziela in years 1887–1891, stored S. Etnographic Museum Cracow.