Search results for "Reproduction"
showing 10 items of 752 documents
Exposition continue à des mélanges de perturbateurs endocriniens
2012
Dans ce projet, il est question d’explorer les effets de mélanges de perturbateurs endocriniens sur plusieurs générations, en considérant des cibles différentes (appareil reproducteur, glande mammaire, os, dent, tissu adipeux, glandes salivaires, cerveau...) et adaptées à chaque âge pour essayer de mieux comprendre comment agissent des perturbateurs endocriniens, en particulier ceux qui interfèrent avec les hormones sexuelles. Parmi les questions majeures que se pose le scientifique, figurent celles de l’effet d’une exposition prolongée à des mélanges de perturbateurs endocriniens depuis la conception jusqu’à l’âge adulte, et de la possibilité que ces expositions aient des répercussions sur…
Photoperiodic regulation of life-history traits before and after eclosion: egg-to-adult development time, juvenile body weight and reproductive diapa…
2012
Photoperiod is the main environmental cue used by northern insects to predict the forthcoming seasonal changes and to adjust their life-history traits to fit these changes. We studied the effects of photoperiod on egg-to-adult development time, juvenile body mass and female reproductive diapause in two northern Drosophila montana populations with different patterns of voltinism. The most interesting findings were consistent between the populations: (1) when maintained before eclosion in short day conditions, representing early autumn, the flies developed faster and were lighter than when maintained in long day conditions, representing early summer, (2) photoperiodic time measurement is appa…
Northern Drosophila montana flies show variation both within and between cline populations in the critical day length evoking reproductive diapause
2013
Reproductive diapause, and its correct timing, plays an important role in the life cycle of many insect species living in a seasonally varying environment at high latitudes. In the present paper we have documented variation in the critical day length (CDL) for adult reproductive diapause and the steepness of photoperiodic response curves (PPRCs) in seven clinal populations of Drosophila montana in Finland between the latitudes 61 and 67°N, paying special attention to variation in these traits within and between cline populations. The isofemale lines representing these populations showed a sharp transition from 0% to 100% in females' diapause incidence in the shortening day lengths, indicate…
Conceptual silencing as a rhetorical tool. A cognitive lexical semantics study of the lexical item Europe
2021
Taking a cognitive lexical semantics perspective, the article introduces the concept of conceptual silencing as a rhetorical tool. Understood as a process of conceptual dissolution of meaning to offer a more coarse-grained sense of an expression, conceptual silencing is demonstrated to have a potential rhetorical value in that it allows for more opaque reproduction of ideology. From a cognitive linguistic standpoint, the process of conceptual silencing hinges upon a polysemous nature of a lexical item and boils down to triggering a given sense of a given lexical item in a given context. To illustrate the workings of conceptual silencing, the article reports on a case study of the lexical it…
Data from: The oxidative cost of reproduction depends on early development oxidative stress and sex in a bird species
2016
In the early 2000’s, a new component of the cost of reproduction was proposed: oxidative stress. Since then the oxidative cost of reproduction hypothesis has, however, received mixed support. Different arguments have been provided to explain this. Among them, the lack of a life history perspective on most experimental tests was suggested. We manipulated the levels of a key intracellular antioxidant (glutathione) in captive zebra finches (Taeniopygia guttata) during a short period of early life and subsequently tested the oxidative cost of reproduction. Birds were allowed to mate freely in an outdoor aviary during several months. We repeatedly enlarged or reduced their broods to increase or …
Il progetto EFIAN per Noto Antica, indagine storica e rappresentazione digitale: un connubio necessario
2017
Il progetto “Experimental Fruition Ingenious Ancient Noto” (E.F.I.A.N) cofinanziato dal M.I.U.R nell’ambito di fondi dedicati all’incentivazione delle start up, costituisce l’ultima iniziativa, in ordine di tempo, rivolta allo studio, alla salvaguardia e alla valorizzazione del sito archeologico di Noto Antica, città distrutta e poi abbandonata in seguito al terremoto del 1693 che devastò la Sicilia sud-orientale. Lo scopo del progetto EFIAN, avviato nel 2014 e concluso nell’ ottobre 2016, è stato quello di incrementare le potenzialità attrattive della antica Noto, nell’ambito del turismo culturale, attraverso i supporti multimediali, fruibili sia nella sede museale di Noto, destinata alla …
Surrogacy relationships: a critical interpretative review
2020
Abstract Based on a critical interpretative review of existing qualitative research investigating accounts of ‘lived experience’ of surrogates and intended parents from a relational perspective, this article proposes a typology of surrogacy arrangements. The review is based on the analysis of 39 articles, which belong to a range of different disciplines (mostly sociology, social psychology, anthropology, ethnology, and gender studies). The number of interviews in each study range from as few as seven to over one hundred. Countries covered include Australia, Canada, Greece, India, Iran, Israel, Italy, Mexico, Norway, Russia, Sweden, UK, Ukraine, and the USA. Most studies focus only on surrog…
Seroprevalence of Rubella among Women of Reproductive Age in Iran: A Prisma-Based Systematic Review and Meta-Analysis
2021
OBJECTIVE: Rubella is a highly contagious viral disease with a significant teratogenic effect. Various results have been published about the seroprevalence of rubella in Iran. A PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses)-systematic review and meta-analysis were conducted to assess the immunity against rubella in Iranian women. METHODS: Eleven English and Persian electronic databases including PubMed, ScienceDirect, Scopus, Web of Science, Google Scholar, Embase, Scientific Information Database, Iran doc, Iran Medex, Magiran, and Medlib were searched using the keywords: Epidemiology, Prevalence, Rubella, Women, Childbearing age, Reproductive age, and Iran. A …
Effects of temperature rising and ocean acidification on reproductive success in the sea urchin Arbacia lixula (L.)
2011
Composition répulsive et utilisations
2021
La présente invention se rapporte à l'utilisation d’au moins un acide gras, avantageusement volatile et odorant, choisi dans le groupe 5 comprenant l’acide propionique, l’acide butyrique et/ou un dérivé de ceux-ci comme principe actif répulsif et/ou pour contrôler la reproduction de brachycères, et à l’utilisation d’une composition, en particulier phytosanitaire, comprenant au moins un acide gras, avantageusement volatile et odorant, choisi dans le groupe comprenant l’acide propionique, 10 l’acide butyrique et/ou un dérivé de ceux-ci comme principe actif répulsif et/ou pour contrôler la reproduction de brachycères avantageusement par olfaction, et non-insecticide. La présente invention trou…