Search results for "Amy"
showing 10 items of 1486 documents
Immunomodulatory effects of dietary β-1,3-glucan from Euglena gracilis in rainbow trout (Oncorhynchus mykiss) immersion vaccinated against Yersinia r…
2012
Abstract Potential immunostimulatory effects of orally administered β-glucan were investigated in combination with immersion vaccination against enteric redmouth disease caused by Yersinia ruckeri in rainbow trout (Oncorhynchus mykiss). A linear, unbranched and pure (purity ≥98%) β-1,3-glucan (syn. paramylon) from the alga Euglena gracilis was applied at an inclusion level of 1% β-glucan in feed administered at a rate of 1% biomass day−1 for 84 consecutive days. Fish were vaccinated after two weeks of experimental feeding and bath challenged with live Y. ruckeri six weeks post-vaccination. Blood and head kidney were sampled at day 0, 13 (1 day pre-vaccination), 15, 55, 59 (day 3 post-challe…
Diversité génétique individuelle, différenciation morphologique et comportementale entres les sexes, patterns d'appariement et paramètres démographiq…
2013
Research in avian behavioral ecology is affected by a known bias in favour of temperate species despite the greatest diversity of tropical species and the radically remote natural conditions which make knowledge of temperate species hardly relevant to tropical species.We propose to reduce the lack of information about tropical birds through the study of a socially monogamous species, reproducing and defending an all-purpose territory all year round, the Zenaida dove, Zenaida aurita. We used monitoring data from a population of ringed birds in Barbados for six years. First, we focused on plumage coloration both to ascertain their sexually mono- or dichromatic nature and whether plumage colou…
Response of Chlamydomonas reinhardtii to Herbicides: Negative Relationship Between Toxicity and Water Solubility Across Several Herbicide Families
2002
International audience
Identification of bound alcohols in soil humic acids by gas chromatography-mass spectrometry
2000
International audience; Humic acids are complex, partly macromolecular, yellow-brownish substances occurring in soils, waters and sediments. In order to shed some light on their molecular structure, crop humic acids were cleaved by alkaline hydrolysis (KOH). The products were fractionated by thin layer chromatography to give mono-alcohols which were analysed as acetate derivatives by gas chromatography coupled to mass spectrometry. Linear alcohols, sterols, stanols and plant-derived triterpenoid alcohols were identified by co-injection of pure standards and by comparison with literature data. These findings imply that alcohols could have been incorporated into the humic matrix by esterifica…
Xenohormones and oral homeostasis : impact on taste preferences and salivary glands
2012
Oral homeostasis strongly influences taste perceptions. It depends on a healthy oral epithelium and salivary gland secretions, which are both regulated by sex hormones. The aim of this thesis was to identify the effect of an oral exposure to Bisphenol A, a food packaging and dental sealer component, and of a soy-diet containing phytoestrogens on oral homeostasisTwo experiments were conducted in adult rats: a dose-response study of BPA (5μg 12.5 mg / kj / day), and a study about the impact of a soy-diet on the BPA disrupting effects. By using gustation choice tests, and histological and qPCR-TR molecular approach, we identify for the first time an action of BPA on dry mouth. We found that BP…
Les Replis du cœur : François Lamy et la méconnaissance de soi
2012
International audience
Assessment of Researchers Through Bibliometric Indicators: The Area of Information and Library Science in Spain as a Case Study (2001–2015)
2018
Research activities are subject to constant processes of evaluation, which increasingly include the use of bibliometric indicators to support decision-making. This paper presents a model for the individual evaluation of different facets of researchers' work and discusses the interest in using “control” parameters to identify deviations suggesting inappropriate conduct. The proposed model is illustrated through an empirical example that analyzes the activity of Spanish researchers in the area of Library and Information Science. There are important differences among the most productive authors, and in many cases, there is no association between the degree of participation in high-impact journ…
Strategia redukcji szkód w pracy z osobami uzależnionymi od narkotyków i alkoholu
2016
Polityka państw europejskich, Stanów Zjednoczonych, Ameryki Południowej i Australii od kilkunastu lat zmierza w kierunku restrukturyzacji systemu pomocy osobom uzależnionym wdrażając działania, których celem jest ograniczanie szkód zdrowotnych i społecznych wynikających z używania substancji psychoaktywnych. Wiele krajów oferuje dostęp do niskoprogowych programów, czyli takich, w których udział nie nakłada na uczestnika obowiązku utrzymywania abstynencji i stosowania się do wygórowanych zasad i obowiązków placówki odwykowej. Redukcja szkód jest filozofią opartą na pragmatycznych i realistycznych celach pracy z osobami uzależnionymi i użytkownikami. Zakłada, że każda, nawet najmniejsza zmian…
Kylmävesihoidon vaikutus immuunipuolustukseen kovan harjoittelujakson yhteydessä
2015
Johdanto. Terveenä pysyminen ja säännöllinen harjoittelu ovat urheilijoille kehityksen kannalta äärimmäisen tärkeää. On kuitenkin tutkittu, että sekä akuutti kuormittava, että pitkään jatkuva intensiivinen harjoittelu saa aikaan immuunipuolustuksen heikentymistä. Kylmään adaptoituneita ihmisiä ja heidän immuunipuolustustaan tutkittaessa puolestaan on saatu tuloksia, joiden mukaan kylmään adaptoitunut immuunipuolustus toimisi eri tavalla ja mahdollisesti tehokkaammin, kuin kylmään adaptoitumattomien yksilöiden immuunijärjestelmä. Tässä tutkimuksessa oli tarkoitus selvittää, saako kymmenen viikon intensiiviseen harjoittelujaksoon yhdistetty kylmävesihoito aikaan muutoksia tietyissä immuunijär…
Biochemical and structural features of a novel cyclodextrinase from cow rumen metagenome.
2007
A novel enzyme, RA.04, belonging to the alpha-amylase family was obtained after expression of metagenomic DNA from rumen fluid (Ferrer et al.: Environ. Microbiol. 2005, 7, 1996-2010). The purified RA.04 has a tetrameric structure (280 kDa) and exhibited maximum activity (5000 U/mg protein) at 70 degrees C and was active within an unusually broad pH range from 5.5 to 9.0. It maintained 80% activity at pH 5.0 and 9.5 and 75 degrees C. The enzyme hydrolyzed alpha-D-(1,4) bonds 13-fold faster than alpha-D-(1,6) bonds to yield maltose and glucose as the main products, and it exhibited transglycosylation activity. Its preferred substrates, in the descending order, were maltooligosaccharides (C3-C…