Development of a cell culture method for quantal assay of strain I-2 of Newcastle disease virus

Repeated titrations of strains of Newcastle disease virus (NDV) are more conveniently undertaken in cell cultures rather than in embryonated eggs. This is relatively easy with mesogenic and velogenic strains that are cytopathic to various cell lines, but is difficult with avirulent Australian isolates that are poorly cytopathic. Strain V4 for example has been shown to be pathogenic iin vitro only to of chicken embryo liver cells. Strain 1-2 was reported to produce cytopathic effect (CPE) on chicken embryo kidney (CEK) cells. The present studies confirmed this observation and developed a quantal assay. CEK cells infected with strain 1-2 developed CPE characterized by degeneration, rounding, granularity and vacuolation, and the formation of synctia. End points were readily established by microscopic examination of fixed and stained cells. In virus infectivity studies on strain 1-2, where multiple titrations are required and where large numbers of samples are used, titration using CEK cell grown in microtitre plates is recommended. Such studies may not be feasible in embryonated eggs.

Az értékesítés és a marketing kapcsolatának piaci tájékozódásban betöltött szerepe és meghatározó tényezői (Role of the sales and marketing relationship in market orientation and its determining factors)

A szerző kutatásában azt vizsgálja, hogy az értékesítés területén dolgozó munkatársak piaci megfigyeléseit milyen mértékben képesek beépíteni a marketingvezetők a menedzsmentmunkába. Az értékesítési munkatársak piaci megfigyelései mindig naprakészek, ráadásul jelentősebb ráfordítás nélkül hozzáférhetők. A marketing- és a sales munkatársak közötti hagyományosan konfliktusokkal terhelt kapcsolat miatt azonban a vállalatok sokszor mégsem aknázzák ki a piaci tájékozódásnak ezt a lehetőségét. A nagyvállalati mintán empirikusan tesztelt modell szerint a menedzserek azon képessége, hogy felhasználják a vállalaton belül rendelkezésre álló információkat, alapvetően nem egyéni, hanem szervezeti képesség. Azok a menedzserek, akik olyan cégeknél dolgoznak, ahol a vállalati továbbképzések során más részlegek munkájába is bekapcsolódhatnak, nagyobb mértékben támaszkodnak a munkatársak piaci megfigyeléseire döntéseik meghozatala során. _____ The author examines in her research that to what extent marketing leaders can build market experience of sales employees into the management activity. Because of the traditionally problematic relationship between marketing and sales employees, companies do not exploit this opportunity of market orientation. According to the model tested on a big corporation sample, the capacity of managers to use information available within the company is basically not an individual but organisational capacity.

Between the Colony and the Revolution: The Formation of the Cuban Nation through Children's Literature of the Republic (1902-1958}), Lecture by Zeila Frade

This flyer promotes the event "Between the Colony and the Revolution: The Formation of the Cuban Nation through Children's Literature of the Republic (1902-1958} Lecture by Zeila Frade".

The H I chronicles of LITTLE THINGS blue compact dwarf galaxies

Star formation occurs when the gas (mostly atomic hydrogen; H I) in a galaxy becomes disturbed, forming regions of high density gas, which then collapses to form stars. In dwarf galaxies it is still uncertain which processes contribute to star formation and how much they contribute to star formation. Blue compact dwarf (BCD) galaxies are low mass, low shear, gas rich galaxies that have high star formation rates when compared to other dwarf galaxies. What triggers the dense burst of star formation in BCDs but not other dwarfs is not well understood. It is often suggested that BCDs may have their starburst triggered by gravitational interactions with other galaxies, dwarf-dwarf galaxy mergers, or consumption of intergalactic gas. However, there are BCDs that appear isolated with respect to other galaxies, making an external disturbance unlikely.^ Here, I study six apparently isolated BCDs from the LITTLE THINGS sample in an attempt to understand what has triggered their burst of star formation. LITTLE THINGS is an H I survey of 41 dwarf galaxies. Each galaxy has high angular and velocity resolution H I data from the Very Large Array (VLA) telescope and ancillary stellar data. I use these data to study the detailed morphology and kinematics of each galaxy, looking for signatures of starburst triggers. In addition to the VLA data, I have collected Green Bank Telescope data for the six BCDs. These high sensitivity, low resolution data are used to search the surrounding area of each galaxy for extended emission and possible nearby companion galaxies.^ The VLA data show evidence that each BCD has likely experienced some form of external disturbance despite their apparent isolation. These external disturbances potentially seen in the sample include: ongoing/advanced dwarf-dwarf mergers, an interaction with an unknown external object, and external gas consumption. The GBT data result in no nearby, separate H I companions at the sensitivity of the data. These data therefore suggest that even though these BCDs appear isolated, they have not been evolving in isolation. It is possible that these external disturbances may have triggered the starbursts that defines them as BCDs.^

Between the Colony and the Revolution: The Formation of the Cuban Nation through Children's Literature of the Republic (1902-1958), Lecture by Zeila Frade

Literary researcher and professor Zeila Frade gives a lecture analyzing the relationship among children's literature, ideology, and cultural identity in Cuba.

Wild bee monitoring in six agriculturally dominated landscapes of Saxony-Anhalt (Germany) in 2010

Wild bee species abundance based on combined flight traps (yellow funnels with perspex windows) placed at ecotones between semi-natural habitats and agricultural fields. Design: six agricultural dominated landscapes of 4x4 km with one trap per square km in Saxony-Anhalt (Germany), activity of traps in late spring-early summer (three sampling rounds) and late summer (three sampling rounds).

Wild bee monitoring in six agriculturally dominated landscapes of Saxony-Anhalt (Germany) in 2011

Wild bee species abundance based on combined flight traps (yellow funnels with perspex windows) placed at ecotones between semi-natural habitats and agricultural fields. Design: six agricultural dominated landscapes of 4x4 km with one trap per square km in Saxony-Anhalt (Germany), activity of traps in late spring-early summer (three sampling rounds) and late summer (three sampling rounds).

Wild bee monitoring in six agriculturally dominated landscapes of Saxony-Anhalt (Germany) in 2014

Wild bee species abundance based on combined flight traps (yellow funnels with perspex windows) placed at ecotones between semi-natural habitats and agricultural fields. Design: six agricultural dominated landscapes of 4x4 km with one trap per square km in Saxony-Anhalt (Germany), activity of traps in late spring-early summer (three sampling rounds) and late summer (three sampling rounds).

TERENO (Terrestrial Environmental Observatories) wild bee monitoring in six agriculturally dominated landscapes of Saxony-Anhalt (Germany)

In 2001 we started as part of the EU FP5 project Greenveins monitoring of insect communities in the normal landscape of Saxony-Anhalt (Germany), which is dominated by agricultural use. We selected four landscape sites of 4x4 km and recorded insects using combined flight traps, combining the ideas of window and yellow pan traps (see Duelli et al., 1999). Traps consist of a yellow funnel (25 cm diameter) filled with water (preserving agent added) and two perspex windows mounted in a way that they are crossed in the center. Within each square km of a site one trap was placed at ecotones between semi-natural habitats and agricultural fields (16 traps per site). Traps were operated in late spring-early summer (three sampling rounds) and late summer (three sampling rounds). Follow-up sampling started in 2010 as long-term monitoring within the TERENO project (www.tereno.net), contributing to the LTER network (Long-Term Ecosystem Research) in Germany (www.lter-d.de) and internationally as well (www.lter-europe.net). Metadata about the sites and related activities and data sets can be found in the DEIMS Repository for Research Sites and Datasets (https://data.lter-europe.net/deims/). In 2010 another two landscapes were added and yearly sampled in the same way. Due to long processing time of trapped insects data of follow-up years will be available about 18 months after trapping.