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Search Results: 1 - 10 of 4246 matches for " Valérie Mechin "
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Energy Values of Registered Corn Forage Hybrids in France over the Last 20 Years Rose in a Context of Maintained Yield Increase  [PDF]
Aurélie Baldy, Marie-Pierre Jacquemot, Yves Griveau, Cyril Bauland, Matthieu Reymond, Valérie Mechin
American Journal of Plant Sciences (AJPS) , 2017, DOI: 10.4236/ajps.2017.86099
Abstract: The cultivation of corn silage has developed in France since the 1970s to reach 1.5 million of hectares nowadays. Since 1998, a feeding value criterion (namely UFL for “Unité Fourrage Laitière”) has been taken into account to register forage varieties in the French forage maize hybrids catalog in addition to other criteria related to plant agronomical performances such as yield, earliness and lodging resistance. It is frequently stated that the improvement of plant’s agronomic performances would led to a decline in forage energy value. Decline of “Unité Fourrage Laitière” values has been repeatedly reported and the expected increase was not yet visible in 2002. In the present study, a set 47 early and mid-early hybrids commercialized in France between 1958 and 2015 has been cultivated in 3 locations in France. “Unité Fourrage Laitière” values and yield have been estimated in order to shed light on the evolution of feeding value criteria during this period and to conclude on the evolution of “Unité Fourrage Laitière” values since the introduction of this criterion for registration. Results obtained in our study demonstrated a recent rise in “Unité Fourrage Laitière” value in a context of strong yield increase. This increase was not necessarily attributable to high cob proportion in the harvested silage. Breeder’s work since the 2000’s has succeeded to offer hybrids that recover “Unité Fourrage Laitière” values similar to the ones of hybrids from the 1960’s (Royal, 1960, 91 UFL/100
Neuroendocrine Differentiation in the Progression of Prostate Cancer: An Update on Recent Developments  [PDF]
Valérie Perrot
Open Journal of Urology (OJU) , 2012, DOI: 10.4236/oju.2012.223032
Abstract: Neuroendocrine (NE) differentiation, either benign or malignant, is the hallmark of prostate cancer (PCa). Clusters of malignant NE cells are found in most prostate cancer cases. NE differentiation is among the non-mutually exclusive theories proposed to explain the progression to androgen independence of PCa. NE differentiation is usually associated with an increased aggressivity and invasiveness of prostate tumors and a poor prognosis. This review aims to present an overview of current knowledge on neuroendocrine differentiation in PCa to improve our understanding of tumour progression and androgen independence. The NE component represents an important therapeutic axis. Development of new generation of drugs that selectively target NE-like cells may lead to the development of new therapeutic modalities for advanced and hormone-refractory PCa.
Bordetella holmesii: Comparison of Two Isolates from Blood and a Respiratory Sample  [PDF]
Valérie Bouchez, Nicole Guiso
Advances in Infectious Diseases (AID) , 2013, DOI: 10.4236/aid.2013.32020

Interest in Bordetella holmesii is increasing, but very little is known about this bacterium, which can be isolated from both blood and respiratory samples. In this study, we compared a B. holmesii isolate from the blood sample of an adult with bacteremia with another isolate from a nasopharyngeal swab from an adult with whooping cough syndrome. Genetic analysis was carried out, targeting relevant genes, and virulence properties were studied in cellular and animal models. Our genomic analysis provided no evidence of traits specific to either blood or respiratory isolates of B. holmesii. Neither isolate was cytotoxic to human tracheal epithelial cells. Both isolates were only weakly invasive and they did not persist within epithelial cells for less than 48 h.

Effect of Pulsed Ultraviolet Light on the Total Phenol Content of Elderberry (Sambucus nigra) Fruit  [PDF]
Ramesh Murugesan, Valérie Orsat, Mark Lefsrud
Food and Nutrition Sciences (FNS) , 2012, DOI: 10.4236/fns.2012.36104
Abstract: The changes in total polyphenolics in elderberry (Sambucus nigra) following treatment with various doses of pulsed ultraviolet rays (UV) were investigated. Four pulsed UV durations (5, 10, 20, 30 seconds) at three energy dosages (4500, 6000, 11,000 J/m2/pulse) were considered for the research. All treated elderberry fruits were incubated for 24 h at room temperature (25℃) following treatment to ensure enough response duration for enhanced development of polyphenols by the berries. The highest increase in total phenolics around 50% was found with 11,000 J/m2/pulse for a 10 seconds treatment while nearly 40% increase in total phenolics was found at an energy dosage of 11,000 J/m2/pulse after 5 seconds exposure. Even though most of the treatments indicated an increase in total polyphenols, some treatment expressed a decrease in phenolics content when compared to untreated fruits.
The Unconscious Experimentally Demonstrated by Means of Hypnosis  [PDF]
Edoardo Casiglia, Valérie Tikhonoff, Enrico Facco
Psychology (PSYCH) , 2016, DOI: 10.4236/psych.2016.74048

Although taken for granted today by people and by some experts, the unconscious has never been experimentally demonstrated. Even for the psychoanalysts, the unconscious is nothing more than a model. The unconscious, if anything, is normally obscured by conscious activities and can only express itself in response to conditions leading to non-ordinary mental expressions, for instance during hypnosis. For many years, we have been using hypnosis in variegating experimental setting, and we think one of the evidences coming from our tests is the experimental demonstration that the unconscious exists and can be forced to respond to solicitations the participant is not aware of. We administered hypnotic suggestions to highly-hypnotizable normal participants with the aim of inducing hallucination of body heating, alexia, amusia, spatial neglect, focused analgesia, general anaesthesia, and age regression. Following such suggestions, participants actually experienced a sensation of heat, incapability to read, lack of interest in a side of the world, indifference to painful stimuli, and revivification of infantile age, respectively. But this is not all. Through the above-mentioned suggestions we also obtained some physical reactions that could only be defined as unconscious, i.e. increase of the stroke volume and of the mesenteric artery flow following hallucinated body heating, reduction of reaction times to incongruent color words in a Stroop task following alexia, prolongation of ipsilateral reaction times following spatial neglect, reduction of mismatch negativity to deviant stimuli following hypnotic amusia, coherent modifications of the sympathetic/parasympathetic balance to trigeminal and non-trigeminal pain during analgesia and anaesthesia, reduction of Raven score and Raven-induced stress during age regression. These responses evoked during hypnosis in response to mental images are clearly non-voluntary and non-conscious, and demonstrate in experimental setting with the tools that are typical of human physiology—the existence of unconscious to perceive and react.

A Critical Evaluation of Single Extractions from the SMT Program to Determine Trace Element Mobility in Sediments
Valérie Cappuyns
Applied and Environmental Soil Science , 2012, DOI: 10.1155/2012/672914
Abstract: Two commonly applied single extractions procedures, namely extractions with ammonium-EDTA and acetic acid, were evaluated based on the analysis of 72 samples from alluvial sediments. For most trace elements (Cu, Zn, Cd, Ni, As, and Pb), a significant linear relationship could be established between their ammonium-EDTA or acetic acid extractable concentrations and their total concentrations, the organic carbon content, pH, and Fe , Al, and/or Ca content in the sediments. The scientific understanding of trace element partitioning in the complex soil-water system with these simple models is rather limited, but they offer the opportunity to use data from single extractions in a more comprehensive way. Despite the fact that these extractions cannot directly be related to the bioavailability of elements, they can provide input data for use in risk assessment models. Additionally, they also offer possibilities to perform a fast screening of the mobilizable pool of elements in soils and/or sediments. 1. Introduction The contamination of soils and sediments is widespread and is a potential threat for the environment in the short and long term. The impact of trace elements in soils and sediments on the environment depends on their speciation, mobility, and bioavailability. Over the past decades, the term “heavy metals” has increasingly been used, without any consistency to denote trace element contamination of environmental media. An overview of the use of the term “heavy metals” in scientific dictionaries and relevant literature can be found in Duffus [1]. Since “heavy metals” is a poor scientific term and many alternatives exit [2], we will use the term “trace elements” in the present study to refer to As, Cd, Cu, Cr, Ni, Pb, and Zn. Talking about trace metals would be incorrect because arsenic is actually a metalloid. Before discussing the different methods for determination of “trace element” availability in soils and/or sediments and before addressing the pros and cons of single and sequential extraction procedures, the difference between soils and sediments will be clarified, as well as the terminology used throughout this paper. 1.1. Soils versus Sediments Soils and sediments are different matrixes from many viewpoints, especially under the environmental context. “Soil” can be defined as a “three-dimensional body with properties that reflect the impact of climate, vegetation, fauna, and topography on soils parent material over a variable time span. Soils are still in a process of change. As a result of “soil formation” or “pedogenesis,” soil profiles show
The chicken as a model to study microchromosomes in birds: a review
Valérie Fillon
Genetics Selection Evolution , 1998, DOI: 10.1186/1297-9686-30-3-209
Chungará (Arica) , 2004, DOI: 10.4067/S0717-73562004000300011
Abstract: how to carry out a comparative study between human groups distinguished by the means of subsistence and their territories? the example of comparison of the lithic industries of the maritimes hunters from seno otway (bahia colorada, englefield 1), the riesco island (ponsonby), the strait of magellan (bahía buena, punta santa ana), the beagle channel (lancha packewa?a) and the terrestrial hunters from fell's cave show us clearly how the lithic technology is a privileged means to answer regional issue of cultural characterization. the results are given with a view to showing methodically how the study has been adjusted to the context and how many questions pertaining to the data comparison have been sorted. in view of a global approach, the author will explain the choices of a technological and typological analysis, and the importance of the economic and cultural patterns constitutions that enhance the concepts ("way of seeing") and also the technical behaviours ("way of doing") used by the inhabitants of those different sites. finally the interpretation and the accuracy of the results in terms of cultural signification will be discussed
Frontières : langues, discours et histoire
Valérie Spa?th
Synergies France , 2005,
Mathilde Lévêque, écrire pour la jeunesse, en France et en Allemagne dans l’entre-deux-guerres
Valérie Vignaux
Strenae : Recherches sur les Livres et Objets Culturels de l'Enfance , 2012,
Abstract: L’ouvrage de Mathilde Lévêque, écrire pour la jeunesse en France et en Allemagne dans l’entre-deux-guerres est la version remaniée d’une thèse de doctorat dirigée par Isabelle Nières-Chevrel qui en rédige la préface. Le livre qui a conservé de la thèse l’assurance de sa méthodologie se déroule au fil des pages comme une enquête, et à travers ses hypothèses donne à voir ce qui constitue la singularité d’une littérature jeunesse en France et en Allemagne au cours de l’entre-deux-guerres.Mathild...
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