Classification and Identification of Pfiesteria and Pfiesteria-Like Species

Dinoflagellates can be classified both botanically and zoologically; however, they are typically put in the botanical division Pyrrhophyta. As a group they appear most related to the protistan ciliates and apicomplexans at the ultrastructure level. Within the Pyrrhophyta are both unarmored and armored forms of the dominant, motile flagellated stage. Unarmored dinoflagellates do not have thecal or wall plates arranged in specific series, whereas armored species have plates that vary in thickness but are specific in number and arrangement. In armored dinoflagellates, the plate pattern and tabulation is a diagnostic character at the family, subfamily, and even genus levels. In most cases, the molecular characterization of dinoflagellates confirms the taxonomy on the basis of external morphology; this has been demonstrated for several groups. Together, both genetic and morphological criteria are becoming increasingly important for the characterization, separation, and identification of dinoflagellates species. Pfiesteria and Pfiesteria-like species are thinly armored forms with motile dinospore stages characterized by their distinct plate formulae. Pfiesteria piscicida is the best-known member of the genus; however, there is at least one other species. Other genetically and morphologically related genera, now grouped under the common names of Lucy, Shepherd\u27s crook, and cryptoperidiniopsoid, are being studied and described in separate works. All these other heterotrophic dinoflagellate groups, many of which are thought to be benign, co-occur in estuarine waters where Pfiesteria has been found

Women in Nineteenth-Century Russia

Russian women of the nineteenth century are often thought of in their literary incarnations as the heroines of novels such as Anna Karenina and War and Peace. But their real counterparts are now becoming better understood as active contributors to Russia’s varied cultural landscape. This collection of essays examines the lives of women across Russia – from wealthy noblewomen in St Petersburg to desperately poor peasants in Siberia – discussing their interaction with the Church and the law, and their rich contribution to music, art, literature and theatre. It shows how women struggled for greater autonomy and, both individually and collectively, developed a dynamic but often overlooked presence in Russia's culture and society during the long nineteenth century (1800-1917). Women in Nineteenth-Century Russia provides invaluable reading for anyone interested in Russian history, nineteenth-century culture and gender studies.Wendy Rosslyn is Emeritus Professor of Russian Literature at the University of Nottingham, UK. Her research on Russian women includes Anna Bunina (1774-1829) and the Origins of Women’s Poetry in Russia (1997), Feats of Agreeable Usefulness: Translations by Russian Women Writers 1763-1825 (2000) and Deeds not Words: The Origins of Female Philantropy in the Russian Empire (2007).Alessandra Tosi is a Fellow at Clare Hall, Cambridge. Her publications include Waiting for Pushkin: Russian Fiction in the Reign of Alexander I (1801-1825) (2006), A. M. Belozel’skii-Belozerskii i ego filosofskoe nasledie (with T. V. Artem’eva et al.) and Women in Russian Culture and Society, 1700-1825 (2007), edited with Wendy Rosslyn

Women in Nineteenth-Century Russia

Russian women of the nineteenth century are often thought of in their literary incarnations as the heroines of novels such as Anna Karenina and War and Peace. But their real counterparts are now becoming better understood as active contributors to Russia’s varied cultural landscape. This collection of essays examines the lives of women across Russia – from wealthy noblewomen in St Petersburg to desperately poor peasants in Siberia – discussing their interaction with the Church and the law, and their rich contribution to music, art, literature and theatre. It shows how women struggled for greater autonomy and, both individually and collectively, developed a dynamic but often overlooked presence in Russia's culture and society during the long nineteenth century (1800-1917). Women in Nineteenth-Century Russia provides invaluable reading for anyone interested in Russian history, nineteenth-century culture and gender studies.Wendy Rosslyn is Emeritus Professor of Russian Literature at the University of Nottingham, UK. Her research on Russian women includes Anna Bunina (1774-1829) and the Origins of Women’s Poetry in Russia (1997), Feats of Agreeable Usefulness: Translations by Russian Women Writers 1763-1825 (2000) and Deeds not Words: The Origins of Female Philantropy in the Russian Empire (2007).Alessandra Tosi is a Fellow at Clare Hall, Cambridge. Her publications include Waiting for Pushkin: Russian Fiction in the Reign of Alexander I (1801-1825) (2006), A. M. Belozel’skii-Belozerskii i ego filosofskoe nasledie (with T. V. Artem’eva et al.) and Women in Russian Culture and Society, 1700-1825 (2007), edited with Wendy Rosslyn

Effects of Gaussian disorder on charge carrier transport and recombination in organic semiconductors

In this review, we discuss recent advances in our understanding of charge transport and exciton generation in disordered organic semiconductors with a Gaussian DOS, with a focus on applications to organic light-emitting diodes (OLEDs). Three-dimensional (3D) modeling shows that the actual current density in OLEDs based on materials with a Gaussian electron and hole DOS is filamentary. However, it is possible to accurately calculate the average current density by solving a one-dimensional (1D) drift-diffusion equation, making use of compact expressions for the temperature, electric field, and carrier density dependent mobility which have been derived from 3D-modeling. For the cases of spatially uncorrelated energetic disorder and spatially correlated disorder due to random dipole fields, these models are called the extended Gaussian disorder model (EGDM) and extended correlated disorder model (ECDM), respectively. We discuss how the effects of trapping on guest molecules can be included, and how exciton generation is described. The application of these models to hole and electron transporting polymer and small molecule materials is discussed, with an emphasis on the modeling of the transport and emission of blue-emitting OLEDs based on a polyfluorene-derivative