The nature and rate of juvenile hormone (JH) biosynthesis and effects of allatostatins and allatotropin have been investigated in isolated corpora allata (CA) of adults and larvae of the noctuid tomato moth, Lacanobia oleracea. In adult female CA, mean rates of synthesis were relatively constant (10-16 pmol/pr/h) at all times. However, the range of JH synthesis by individual CA of similarly aged insects was quite large (2-30 pmol/pr/h). High performance liquid chromatography (HPLC) separation shows that adult female moth CA synthesise predominantly JH I and JH II. Rates of JH synthesis in vitro are dependent on methionine concentration. Synthetic Manduca sexta allatostatin (Mas-AS) caused a dose-dependent inhibition of JH synthesis by adult female CA but only to a max. of 54%, whilst 10 µM synthetic M. sexta allatotropin caused a 37% stimulation of CA activity. At 1 mM the cockroach allatostatin, Dip-allatostatin-2, had no significant effect on JH synthesis. In larval L. oleracea, rates of JH biosynthesis were very low., Neil Audsley, Robert J. Weaver, John P. Edwards, and Lit
This paper analyses the so-called Chapbooks that were being written or translated on the dawn of the 19th century. The authors tried to educate the ignorant peasants, the targeted readers, through their fetching stories. The work shows facts and deeds that were presented as "right" and "wise". First of all it presents the factual public enlightenment, more specifically the altering appreciation of time. Next, there is an analysis of the way the authors were maintaining the cogency of their work; the paper discusses whether the narrative style of writing is compatible with the didactic intention, and the characteristics of the "rational order of explanation"., Barbora Matiášová., and Obsahuje bibliografické odkazy
This article presents Christian Kyrill Schneider OFM, a significant yet not widely known Franciscan missionary who lived in the second half of the 18th century and worked in Egypt and surrounding Middle East Area. His autography that is only available as a manuscript and has never been presented before is fully described here. An excerpt of one chapter offers an insight into a catching egodocument from the beginning of the 19th century. This study is set in the context of Franciscan missions with an important focus on the activity of brothers from the Czech lands in the Middle East. The introductory chapter summarizes basic bibliography of history of Franciscan missionaries and their writings., Kateřina Holanová., and Obsahuje bibliografické odkazy
The aim of the present study is to trace an interpretation of Rousseau’s novel Julie ou la Nouvelle Heloise on the basis of the difference between love and friendship. Starting with a brief reminder of Paul de Man’s interpretation of this novel in Allegories of Reading, the author turns to Jacques Derrida and borrows a key neologism from his book The Politics of Friendship: aimance or lovence, an affective modality which blurs and transcends the duality of love and friendship. On this basis, the author presents a few remarks concerning the literary form of the novel, the configuration of its characters and finally the place of Rousseau’s Julie in the context of his other works. Rather than being an isolated literary work, Julie seems to be an attempt to answer certain questions concerning the relation between individual and society from a different angle than that chosen in The Social Contract., Etienne Balibar ; překlad Josef Fulka., and Obsahuje bibliografické odkazy
Climate features that influence life cycles, notably severity, seasonality, unpredictability and variability, are summarized for different polar zones. The zones differ widely in these factors and how they are combined. For example, seasonality is markedly reduced by oceanic influences in the Subantarctic. Information about the life cycles of Arctic and Antarctic arthropods is reviewed to assess the relative contributions of flexibility and programming to life cycles in polar regions. A wide range of life cycles occurs in polar arthropods and, when whole life cycles are considered, fixed or programmed elements are well represented, in contrast to some recent opinions that emphasize the prevalence of flexible or opportunistic responses. Programmed responses ale especially common for controlling the appearance of stages that are sensitive to adverse conditions, such as the reproductive adult. The relative contribution of flexibility and programming to different life cycles is correlated with taxonomic affinity (which establishes the general lifecycle framework for a species), and with climatic zone, the habitats of immature and adult stages, and food., Hugh V. Danks, and Lit