Search results for "ants"
showing 10 items of 7011 documents
Pathways for the amplification of agroecology in African sustainable urban agriculture
2020
A growing awareness that highly intensified agricultural systems have made a substantial worldwide contribution to the worsening of the resilience capacity of natural ecosystems has, over the last twenty years, brought general attention to agroecological management models. This aspect is even more evident in industrial agriculture, which is based on the use of multiple chemical products derived from non-natural synthesis. In more developed countries, a new idea of ecology linked to agricultural production has been increasingly developed and, for this reason, there has been a greater diffusion of differentiated agricultural models taking into consideration the environmental impact of product…
Regulation of type 1 fimbriae synthesis and biofilm formation by the transcriptional regulator LrhA of Escherichia coli
2005
Type 1 fimbriae ofEscherichia colifacilitate attachment to the host mucosa and promote biofilm formation on abiotic surfaces. The transcriptional regulator LrhA, which is known as a repressor of flagellar, motility and chemotaxis genes, regulates biofilm formation and expression of type 1 fimbriae. Whole-genome expression profiling revealed that inactivation oflrhAresults in an increased expression of structural components of type 1 fimbriae.In vitro, LrhA bound to the promoter regions of the twofimrecombinases (FimB and FimE) that catalyse the inversion of thefimApromoter, and to the invertible element itself. TranslationallacZfusions with these genes and quantification offimEtranscript le…
The European Union as a laboratory of paradiplomacy in the context of international and domestic determinants of regions' foreign activities
2019
Celem artykułu jest zaproponowanie podejścia postrzegającego UE jako laboratorium paradyplomacji w kontekście międzynarodowych i wewnętrznych uwarunkowań aktywności zagranicznej regionów. Artykuł otwierają rozważania definicyjne, które pozwalają zrozumieć niejednoznaczność statusu regionów w stosunkach międzynarodowych. Następnie przywołane zostały wymiary i typy paradyplomacji. W dalszej kolejności, identyfikowane są międzynarodowe i wewnętrzne uwarunkowania międzynarodowego zaangażowania regionów. Podejście postrzegające UE jako laboratorium paradyplomacji wyjaśniono w trzech kolejnych częściach. W pierwszej, integracja europejska jest traktowana jako międzynarodowo-narodowa (intermestic)…
The roles of information systems in a value net
2002
Beware of the “poverty migrant”: media discourses on EU labour migration and the welfare state in Germany and the UK
2021
Abstract This article examines the role of the media in the EU freedom of movement debate through the lens of high-circulation German and UK newspapers during the first half of 2014. It explores how the media problematised migration from Eastern European member states and its influence on national host country labour markets and welfare systems. It also analyses how different media outlets positioned themselves in relation to relevant policies or policy proposals. The findings show that most articles in our sample present low-skill, low-wage working European Union (EU) migrant class referred to as “poverty migrants” as a problem to be addressed at the policy level in contrast with the econo…
Equilibres divariants entre la vapeur d'eau et les hydrates solides : Caractérisation de la nature de la solution solide, limites du domaine de divar…
1972
National audience; Nous avons récemment proposé (1, 2) deux modèles thermodynamiques pour les équilibres divariants entre la vapeur d'eau et les hydrates salins solides. Le premier postule l'existence d'une solution solide d'insertion d'eau dans le sel, le second postule l'existence d'une solution solide de substitution entre deux hydrates du sel. Le but de ce travail est d'établir un nouveau critère permettant de distinguer les deux modèles à partir de l'expérience et de délimiter le domaine divariant dans chacun des deux cas. Nous supposerons, sauf mention contraire, que la solution d'insertion obéit à la loi de Henry par rapport à l'eau et que la solution de substitution est idéale. Nous…
Relational approach to infant-teacher lap interactions during the transition from home to early childhood education and care
2022
The transition from home care to early childhood education and care (ECEC) is a period of intense change and development in young children's socio-spatial worlds. This article focuses on infant–teacher lap interactions during this transition period. This investigation applies a relational approach to the study of infant–teacher lap interactions. In doing so, it highlights the inherently social and contextual nature of interaction. From a relational perspective, actors, context, and situation are seen as constitutive of each other, and their interrelationality is considered central to the emergence of interactions. The data, regarding infants' first months attending ECEC in Finland, is compo…
Genetic analysis of BRCA1 and BRCA2 genes in Sicilian high risk families and functional characterization of BRCA1 variants of uncertain significance …
2014
Index Balearicum (III). Catàleg comentat de les plantes vasculars descrites de les Illes Balears. Addicions (2008-2016) i correccions
2017
Aquesta compilació inclou actualitzacions nomenclaturals i taxonòmiques per al catàleg de plantes vasculars descrites de les Illes Balears. Aquesta actualització inclou plantes descrites entre 2008 i 2016 a més de correccions per a altres tractades en treballs anteriors.
Antibacterial activity and cytotoxicity of selected Egyptian medicinal plants.
2011
Medicinal plants have been used as a source of remedies since ancient times in Egypt. The present study was designed to investigate the antibacterial activity and the cytotoxicity of the organic extracts from 16 selected medicinal plants of Egypt. The study was also extended to the isolation of the antiproliferative compound jaeschkeanadiol p-hydroxybenzoate (FH-25) from Ferula hermonis. The microbroth dilution was used to determine the minimal inhibitory concentration (MIC) of the samples against twelve bacterial strains belonging to four species, Providencia stuartii, Pseudomonas aeruginosa, Klebsiella pneumoniae, and Escherichia coli, while a resazurin assay was used to assess the cytoto…