Search results for "InSe"

Could Europe Apply a Suitable Control Method for the Small Hive Beetle (Coleoptera: Nitidulidae)?

2022

Abstract The European bee, Apis mellifera L. (Hymenoptera: Apidae), is a fundamental resource for the pollination of a great variety of botanical species used by humans for sustenance. Over the last few decades, bee colonies have become vulnerable to a new pest that has advanced beyond its native sub-Saharan territory: the small hive beetle, Aethina tumida Murray (Coleoptera: Nitidulidae). This currently presents a pressing problem in the United States and Australia, but it has also been recorded in Portugal and Italy and it is likely to spread in the rest of Europe too. This study represents a systematic review, based on EFSA guidelines, of the various control treatments for small hive bee…

Hypoxia-induced reduction of sVEGFR-2 levels in human colonic microvascular endothelial cells in vitro: Comparative study with HUVEC.

2008

The functionality of large-vessel endothelial cells, such as human umbilical vein endothelial cells (HUVEC), may differ significantly from that in the microvasculature. We established a method for the isolation of human colonic microvascular endothelial cells (HCMEC). Since colonic diseases are often accompanied by hypoxia we examined its effects on HCMEC of five individuals in comparison with HUVEC, with respect to the secretion of the soluble form of the two important vascular endothelial growth factor (VEGF) receptors, VEGFR-1 and 2. After dissociation by dispase/collagenase of mucosal and submucosal tissue obtained from normal adult colon, HCMEC were isolated using CD31-coated magnetic …

Gozosas matanzas

2002

Foragers of the stingless bee Plebeia droryana inform nestmates about the direction, but not the distance to food sources

2020

The tropical stingless bees have evolved intricate communication systems to recruit nestmates to food locations. Some species are able to accurately communicate the location of food, whereas others simply announce the presence of food in the environment. Plebeia droryana is a tiny Neotropical stingless bee that, until recently, was thought to use a solitary foraging strategy, that is without the use of a recruitment communication system. However, recent research has indicated that P. droryana might be able to recruit nestmates to specific food source locations. We tested this by studying whether foragers can guide nestmates in the direction and the distance of artificial feeders placed in t…

Les jeunes en situation de NEET : le rôle des compétences de base

2021

International audience; Enjeu prioritaire des politiques publiques nationales et européennes, les jeunes qui ne sont ni en emploi, ni en études, ni en formation connaissent un risque d’exclusion plus ou moins marqué selon les pays. Si le niveau d'éducation joue un rôle central dans ces situations, l’approche par les compétences de base permet d’affiner la focale. Les données internationales montrent en effet qu’un même niveau de diplôme ne certifie pas partout le même niveau de compétences. Comment s’expliquent ces écarts ? Dans quelle mesure ces compétences protègent-elles des situations de NEET indépendamment du diplôme ?

La population étudiante à l'épreuve des comparaisons internationales

2019

International audience; Deux grands types d'enquêtes originales permettent de cerner les mondes étudiants dans l'espace européen de l'enseignement supérieur. Ce chapitre dévoile les principaux résultats en matière de conditions de vie des étudiant-e-s et d’insertion professionnelle en l’illustrant par les spécificités des étudiants au cœur de neuf pays qui ont participé à ces projets depuis 1999. Le croisement des informations, qui reposent sur les expériences et les perceptions des jeunes, permet de dégager les tendances communes au niveau de l'Europe et de saisir les particularités de chaque pays. Malgré certaines similitudes avec l'ensemble des diplômé-e-s européens, les conditions de vi…

Factors Behind Junk DNA in Bacteria

2012

Although bacterial genomes have been traditionally viewed as being very compact, with relatively low amounts of repetitive and non-coding DNA, this view has dramatically changed in recent years. The increase of available complete bacterial genomes has revealed that many species present abundant repetitive DNA (i.e., insertion sequences, prophages or paralogous genes) and that many of these sequences are not functional but can have evolutionary consequences as concerns the adaptation to specialized host-related ecological niches. Comparative genomics analyses with close relatives that live in non-specialized environments reveal the nature and fate of this bacterial junk DNA. In addition, the…

Bacterial endosymbionts of insects: insights from comparative genomics.

2004

The development of molecular techniques for the study of uncultured bacteria allowed the extensive study of the widespread association between insects and intracellular symbiotic bacteria. Most of the bacterial endosymbionts involved in such associations are gamma-proteobacteria, closely related to Escherichia coli. In recent years, five genomes from insect endosymbionts have been sequenced, allowing the performance of extensive genome comparative analysis that, as a complement of phylogenetic studies, and analysis on individual genes, can help to understand the different traits of this particular association, including how the symbiotic process is established, the explanation of the specia…

The fine structural organization of sternal glands of pseudergates and workers in termites (Isoptera): a comparative survey

2008

1873-5495 (Electronic) Comparative Study Journal Article; Thirty-nine species belonging to different families of termites are studied to give a comprehensive view of the evolution of the sternal glands. Several modifications occurring at cuticular and cytological levels are described in neuter castes. The outer epicuticle is always pierced by epicuticular pores. In advanced termites the epicuticular filaments greatly increase in number and length creating a thick layer. The pore canals gradually enlarge while the cuticle changes into a lattice structure lining an extracellular space in which the secretion is stored. Two classes of cells are present in basal termites (Mastotermitidae, Hodote…

La competenza docimologica per la valorizzazione dei talenti. Una ricerca con i futuri docenti di scuola primaria e dell’infanzia

2018

Educating gifted students must be a priority for educators and education systems if society is to capitalise on their potential to contribute to an economical and sustain- able future. Given the importance of teachers in supporting academic achievement, educating preservice teachers on how to cater for gifted students commences the process as they can foster the implementation of current teaching practices that draw on sub- stantial research into the education of gifted children. If Evaluation process becomes an instrument for the development of talent in the classroom pre-service teacher training in docimological skill is necessary. In the ed- ucational field, talent and excellence find th…