109 research outputs found
Le contrôle sanitaire du lait I. — Inspection préventive du lait pasteurisé
Thieulin Gustave Léon, Basille Daniel. Le contrôle sanitaire du lait I. — Inspection préventive du lait pasteurisé. In: Bulletin de l'Académie Vétérinaire de France tome 108 n°6, 1955. pp. 211-220
Méthode d’appréciation de la qualité hygiénique des œufs congelés
Thieulin Gustave Léon, Basille Daniel. Méthode d’appréciation de la qualité hygiénique des œufs congelés. In: Bulletin de l'Académie Vétérinaire de France tome 110 n°2, 1957. pp. 67-77
Le contrôle sanitaire du lait III. — Méthode d' appréciation de la qualité moyenne d’une fourniture de lait pasteurisé
Thieulin Gustave Léon, Basille Daniel. Le contrôle sanitaire du lait III. — Méthode d' appréciation de la qualité moyenne d’une fourniture de lait pasteurisé. In: Bulletin de l'Académie Vétérinaire de France tome 108 n°9, 1955. pp. 417-423
Le contrôle sanitaire du lait. IV. — Inspection du lait stérilisé
Thieulin Gustave Léon, Basille Daniel, Rosset Roland. Le contrôle sanitaire du lait. IV. Inspection du lait stérilisé. In: Bulletin de l'Académie Vétérinaire de France tome 111 n°2, 1958. pp. 65-74
Effet des rayonnements ionisants sur la flore microbienne de l’œuf cassé congelé
Thieulin Gustave Léon, Brunelet L., Sarrazin P., Basille Daniel. Effet des rayonnements ionisants sur la flore microbienne de l'œuf cassé congelé. In: Bulletin de l'Académie Vétérinaire de France tome 112 n°10, 1959. pp. 589-602
Sex-specific effects of wind on the flight decisions of a sexually-dimorphic soaring bird
1. In a highly dynamic airspace, flying animals are predicted to adjust foraging behaviour to variable wind conditions to minimize movement costs.
2. Sexual size dimorphism is widespread in wild animal populations, and for large soaring birds which rely on favourable winds for energy‐efficient flight, differences in morphology, wing loading and associated flight capabilities may lead males and females to respond differently to wind. However, the interaction between wind and sex has not been comprehensively tested.
3. We investigated, in a large sexually dimorphic seabird which predominantly uses dynamic soaring flight, whether flight decisions are modulated to variation in winds over extended foraging trips, and whether males and females differ.
4. Using GPS loggers we tracked 385 incubation foraging trips of wandering albatrosses Diomedea exulans , for which males are c . 20% larger than females, from two major populations (Crozet and South Georgia). Hidden Markov models were used to characterize behavioural states—directed flight, area‐restricted search (ARS) and resting—and model the probability of transitioning between states in response to wind speed and relative direction, and sex.
5. Wind speed and relative direction were important predictors of state transitioning. Birds were much more likely to take off (i.e. switch from rest to flight) in stronger headwinds, and as wind speeds increased, to be in directed flight rather than ARS. Males from Crozet but not South Georgia experienced stronger winds than females, and males from both populations were more likely to take‐off in windier conditions.
6. Albatrosses appear to deploy an energy‐saving strategy by modulating taking‐off, their most energetically expensive behaviour, to favourable wind conditions. The behaviour of males, which have higher wing loading requiring faster speeds for gliding flight, was influenced to a greater degree by wind than females. As such, our results indicate that variation in flight performance drives sex differences in time–activity budgets and may lead the sexes to exploit regions with different wind regimes
Uniting statistical and individual-based approaches for animal movement modelling
<div><p>The dynamic nature of their internal states and the environment directly shape animals' spatial behaviours and give rise to emergent properties at broader scales in natural systems. However, integrating these dynamic features into habitat selection studies remains challenging, due to practically impossible field work to access internal states and the inability of current statistical models to produce dynamic outputs. To address these issues, we developed a robust method, which combines statistical and individual-based modelling. Using a statistical technique for forward modelling of the IBM has the advantage of being faster for parameterization than a pure inverse modelling technique and allows for robust selection of parameters. Using GPS locations from caribou monitored in Québec, caribou movements were modelled based on generative mechanisms accounting for dynamic variables at a low level of emergence. These variables were accessed by replicating real individuals' movements in parallel sub-models, and movement parameters were then empirically parameterized using Step Selection Functions. The final IBM model was validated using both k-fold cross-validation and emergent patterns validation and was tested for two different scenarios, with varying hardwood encroachment. Our results highlighted a functional response in habitat selection, which suggests that our method was able to capture the complexity of the natural system, and adequately provided projections on future possible states of the system in response to different management plans. This is especially relevant for testing the long-term impact of scenarios corresponding to environmental configurations that have yet to be observed in real systems.</p></div
'Glocal' disorder: causes, conduct and consequences of the 2008 Greek unrest
This article examines the unrest that emanated in Athens and rolled out across Greek cities in December 2008 as a case through which to advance understanding of how local, national and international arenas may together shape localised episodes of disorder. We begin by addressing the proximate and structural causes of the unrest, before turning to explore the multifarious character of protest actions, including novel and derivative forms of contestation deployed by protestors, and public debate about the appropriate apportioning of blame amongst the variety of actors involved. Finally, we look at the diverse outcomes of the unrest and their impact upon extant socio-political tensions. For each stage of the lifecycle of the unrest, we evaluate the relevance of international actors, practices and discourses. Our analysis of the Greek unrest of 2008 suggests, first, that the array of intersections between global, national and local dimensions of unrest are more diverse than has heretofore been recognised by pertinent scholarship; and second, that international or transnational factors may play a significant role in the emergence, conduct and consequences of disorder even in instances where national and local dynamics remain predominant
Crystal Structure of the PAC1R Extracellular Domain Unifies a Consensus Fold for Hormone Recognition by Class B G-Protein Coupled Receptors
Pituitary adenylate cyclase activating polypeptide (PACAP) is a member of the PACAP/glucagon family of peptide hormones, which controls many physiological functions in the immune, nervous, endocrine, and muscular systems. It activates adenylate cyclase by binding to its receptor, PAC1R, a member of class B G-protein coupled receptors (GPCR). Crystal structures of a number of Class B GPCR extracellular domains (ECD) bound to their respective peptide hormones have revealed a consensus mechanism of hormone binding. However, the mechanism of how PACAP binds to its receptor remains controversial as an NMR structure of the PAC1R ECD/PACAP complex reveals a different topology of the ECD and a distinct mode of ligand recognition. Here we report a 1.9 Å crystal structure of the PAC1R ECD, which adopts the same fold as commonly observed for other members of Class B GPCR. Binding studies and cell-based assays with alanine-scanned peptides and mutated receptor support a model that PAC1R uses the same conserved fold of Class B GPCR ECD for PACAP binding, thus unifying the consensus mechanism of hormone binding for this family of receptors
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