Search results for "cens"
showing 10 items of 803 documents
Parodia dei generi, della storia e della letteratura nel cinema di Franco e Ciccio
Predation on Multiple Trophic Levels Shapes the Evolution of Pathogen Virulence
2009
The pathogen virulence is traditionally thought to co-evolve as a result of reciprocal selection with its host organism. In natural communities, pathogens and hosts are typically embedded within a web of interactions with other species, which could affect indirectly the pathogen virulence and host immunity through trade-offs. Here we show that selection by predation can affect both pathogen virulence and host immune defence. Exposing opportunistic bacterial pathogen Serratia marcescens to predation by protozoan Tetrahymena thermophila decreased its virulence when measured as host moth Parasemia plantaginis survival. This was probably because the bacterial anti-predatory traits were traded o…
Genomic evolution of bacterial populations under co-selection by antibiotics and phage
2017
Bacteria live in dynamic systems where selection pressures can alter rapidly, forcing adaptation to the prevailing conditions. In particular, bacteriophages and antibiotics of anthropogenic origin are major bacterial stressors in many environments. We previously observed that populations of the bacterium Pseudomonas fluorescens SBW25 exposed to the lytic bacteriophage SBW25Φ2 and a noninhibitive concentration of the antibiotic streptomycin (coselection) achieved higher levels of phage resistance compared to populations exposed to the phage alone. In addition, the phage became extinct under coselection while remaining present in the phage alone environment. Further, phenotypic tests indicate…
The Influence of Contextual Aspects in Talent Development: Interaction Between Relative Age and Birthplace Effects in NBA-Drafted Players
2021
The aims of this study were two-fold: (1) to inspect separately for the relative age and birthplace effects for players selected in the National Basketball Association (NBA) draft; (2) to explore the interaction among these factors and analyse this interaction in players' career performance. The database was obtained from the official records of the players (n = 1,738), who were selected during the annual editions of the NBA Draft from 1990 to 2019. The participants' date of birth was analyzed according to the month of birth and divided into four quartiles. The place of birth was compared to the distribution of the general population' places of birth based on different communities' sizes. C…
On porn censorship and liberal ethics in the UK. Brief notes on the Audiovisual Media Services Regulations 2014
2015
This article deals with the highly criticised Audiovisual Media Services Regulations 2014, which provides that now the British Board of Film Classification (BBFC) regulations apply also to the videos-on-demand (and not only to DVDs).
The effect of prey resources on evolutionary and ecological dynamics of prey (Serratia marcescens) and predator (Tetrahymena thermophila)
2006
The effect of a temperature-sensitive prophage on the evolution of virulence in an opportunistic bacterial pathogen.
2022
https://doi.org/10.1111/mec.16638 Abstract Viruses are key actors of ecosystems and have major impacts on global biogeochemical cycles. Prophages deserve particular attention as they are ubiquitous in bacterial genomes and can enter a lytic cycle when triggered by environmental conditions. We explored how temperature affects the interactions between prophages and other biological levels by using an opportunistic pathogen, the bacterium Serratia marcescens, that harbours several prophages and that had undergone an evolution experiment under several temperature regimes. We found that the release of one of the prophages was temperature-sensitive and malleable to evolutionary changes. We furthe…
Prezentācijas prasmes jauniešu vecumposmā
2019
Jauniešu vecumposms ir tas laiks, kad cilvēks esošās zināšanas ir spējīgs uzlabot ar publiskajām runām un citās situācijās. Šis darbs pēta jauniešu prezentēšanas prasmes izaugsmi, kā arī apskata šo prasmju īpašības, ķermeņa valodas iedarbību publisko runu laikā, kā arī apskata, kas būtu jādara, lai publiskā runa būtu atmiņā paliekoša. Darba mērķis ir izpētīt kādas ir tipiskākās iezīmes prezentēšanas prasmēs jauniešu vecumposā, tādējādi rodot iespējas uzlabot viņu zināšanas un prasmes. Darbā izmantotas pētījuma metodes kā literatūras pārskats un apsekojumi. Apsekojumos studenti un skolotāji aizpildīja anketas. Rezultāti parādīja, ka studentiem pietrūkst zināšanu nozīmīgākās informācijas iekļ…
Ravintoresurssin ajallisen vaihtelun vaikutus saaliin (Serratia marcescens -bakteeri) ja pedon (Tetrahymena thermophila -alkueläin) evolutiiviseen ja…
2010
Resurssit ovat yksi tärkeimmistä eliöiden evoluutioon vaikuttavista ympäristötekijöistä. Esimerkiksi eliöiden kyky kilpailla ja puolustautua voivat kehittyä erilailla ravintoympäristöstä ja sen muutoksista riippuen: hyvä resurssisaatavuus voi mahdollistaa kalliisiin puolustusominaisuuksiin allokoimisen, kun taas resurssien puute voi estää saaliin puolustusominaisuuksien evoluution. Tutkin saalistuksen ja ympäristön vaihtelun vaikutusta faktoriaalisessa mikrokosmos kokeessa, jossa saalisbakteereita (Serratia marcescens) kasvatettiin joko yksin (kontrollit) tai yhdessä alkueläinpedon (Tetrahymena thermophila) kanssa vakaassa tai vaihtelevassa ravintoresurssiympäristössä 8 viikon ajan. Petojen…
Population et territoire: une incessante recomposition
2001
Un an après la parution des premiers résultats du recensement général, que dire de l'évolution de la population en Franche-Comté ? Au-delà des chiffres agrégés qui fournissent une image incomplète d'une réalité rendue toujours plus complexe par les migrations, interrogeons-nous sur quelques indicateurs capables de traduire l'extrême diversité des situations communales tout en conservant une approche géographique permettant de mettre en évidence des régularités spatiales.