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Search Results: 1 - 10 of 222442 matches for " Céline; Prado Pano "
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Transporte de Atrazina en un Andosol y un Vertisol de México
Raymundo Raymundo,Elías; Nikolskii Gavrilov,Iourii; Duwig,Céline; Prado Pano,Blanca Lucía; Moreno,Claudia Isabel; Gavi Reyes,Francisco; Figueroa Sandoval,Benjamín;
Interciencia , 2009,
Abstract: the problem of pesticide migration in agricultural lands is traditionally studied by means of periodical soil, water and plant sampling. more advanced methods are available today, which permit to reduce the costs of field analysis and to predict environmental contamination risk. these methods are based on mathematical simulation of pesticide movement. the process of atrazine migration in a volcanic soil andosol and a vertisol of mexico was studied by means of laboratory experiments in packed columns. different atrazine doses and steady state unsaturated water flow were applied in the experiments. the 18o and br- water tracers were used to compare atrazine and water movement. the atrazine and water mass balance components were measured, as well as the dynamics of elution. the chemical substances movement theory was applied to interpret the experimental results and to obtain the principal properties of atrazine transport in both soils. the results show that atrazine moves in the andosol 10-16 times slower than water, and 2.5 times slower in the vertisol. five properties of atrazine transport were determined, which can be used to predict the migration of this pesticide so as to minimize the sampling effort in the field, and to assess the risk of soil and aquifer contamination by calculation methods reported in the literature.
Assessing Development Pathway Trends in Developing Countries over the 1995-2010 Period Using Multivariate Analysis  [PDF]
Céline Dondeynaz, César Carmona Moreno
Journal of Water Resource and Protection (JWARP) , 2018, DOI: 10.4236/jwarp.2018.103018
Abstract: Country development is a complex issue that can be meant from a strict economic view to a more integrated vision. This study analyses the sustainable development in terms of access to basics services, water resources management and external support from Donors. 103 countries are analysed according to 22 variables that include the access to basic services, urbanisation process, uses of water resource, freshwater availability, governance and Official Development Assistance. The measure of Human Development has progressed for all countries except one, during 1995-2010 period. Countries are clustered in 5 reference profiles, where profiles 4 and 5 are considered the poorest and mostly include African countries. The mid-term changes concern 16% of the countries, where most of them are related to governance and Development Assistance aspects. 5% shifts are temporary changes due to the country specificity. Changes from or to the profiles 4 and 5 are deeper analysed providing potential explanations.
A Multilevel Core Sampler Device to Directly Estimate Food Supply Accessible to Waders  [PDF]
Christophe Luczak, Dominique Menu, Céline Rolet
Open Journal of Marine Science (OJMS) , 2013, DOI: 10.4236/ojms.2013.32A006
Abstract:

To understand food webs functioning in intertidal soft-sediments, it is critical to assess the macrobenthic prey fraction accessible to waders. Here we describe a simple core sampler device allowing to directly relating the vertical distribution of macrozoobenthos to waders bill length. Bill length measurements were used as a proxy of probing depth to estimate the amount of food supply accessible. Several metal plates can be inserted in the core sampler at different heights according to the bill length data of the studied species. These data are provided in a literature survey. For each species, the bill length variability is then explicitly taken into account in the estimation of food accessibility. The core is transparent to check for the quality of the sample. It could also be used to estimate a Benthic Habitat Quality index (BHQ) based on characteristics of the vertical structure of the sediment. This multilevel core is easy to build and to adapt to any studied wader species of the intertidal zone, floodplains or other wetlands. The samples are obtained with the same effort as with usual circular cores leading to the possibility to survey large area. With one core sample, the ecological information that can be achieved at once is threefold: 1) benthic community structure (partitioned in several depths), 2) estimate of the accessible food fraction to waders (range of values) and 3) habitat quality index assessment.

Current needs, the future of adolescents and young adults having sustained a moderate or severe Traumatic Brain Injury (TBI) and the potential of their social participation  [PDF]
Sirois Katia, Boucher Normand, Lepage Céline
Open Journal of Therapy and Rehabilitation (OJTR) , 2014, DOI: 10.4236/ojtr.2014.21009
Abstract: The general objective of this study is to identify the specific needs of youths who have suffered a moderate or severe traumatic brain injury (TBI) and their levels of life habit accomplishments. The secondary objective aims to identify how they view themselves in the future with regard to their life habits. Eighteen young persons with moderate or severe TBIs aged 14 to 20 completed questionnaires based on the Life-Habits questionnaire and elaborated on their current level of satisfaction and their visions of the future. Teenagers reported that maintaining good interpersonal relationships, being autonomous, fulfilling their responsibilities, warding off lone-liness, as well as being supported in their efforts to reach a satisfying response to their needs and concerns were their highest priorities. In order to increase their satisfaction related to life habits they suggest improving external factors, such as information concerning TBIs to their entourage. They see themselves as complete social participants in the future. Youths with moderate or severe TBIs identified their needs and envisioned their future to be like that of any other teenager and young adult. They hope to start a family and find a good job. They also identified strategies to improve their life habits.
Behaviour of Roofing Materials Facing to Micro-Organisms  [PDF]
Marielle Fassier, Céline Faugeron, Vincent Gloaguen, Céline Ducroquetz, Olivier Dupont
Green and Sustainable Chemistry (GSC) , 2013, DOI: 10.4236/gsc.2013.31002
Abstract:

An accelerated water-streaming test was used to evaluate several roofing materials regarding their behavior to colonization by algae, by closely reproducing the phenomenon of natural biological soiling. A set of roofing materials with defined physical and chemical characteristics was thus investigated against the colonization by algae. Porosity, roughness and chemical composition showed to be factors of influence in the establishment of those micro-organisms.

A Cysteine Protease Inhibitor of Plasmodium berghei Is Essential for Exo-erythrocytic Development
Christine Lehmann,Anna Heitmann,Satish Mishra,Paul-Christian Burda,Mirko Singer,Monica Prado,Livia Niklaus,Céline Lacroix,Robert Ménard,Friedrich Frischknecht,Rebecca Stanway,Photini Sinnis,Volker Heussler
PLOS Pathogens , 2014, DOI: doi/10.1371/journal.ppat.1004336
Abstract: Plasmodium parasites express a potent inhibitor of cysteine proteases (ICP) throughout their life cycle. To analyze the role of ICP in different life cycle stages, we generated a stage-specific knockout of the Plasmodium berghei ICP (PbICP). Excision of the pbicb gene occurred in infective sporozoites and resulted in impaired sporozoite invasion of hepatocytes, despite residual PbICP protein being detectable in sporozoites. The vast majority of these parasites invading a cultured hepatocyte cell line did not develop to mature liver stages, but the few that successfully developed hepatic merozoites were able to initiate a blood stage infection in mice. These blood stage parasites, now completely lacking PbICP, exhibited an attenuated phenotype but were able to infect mosquitoes and develop to the oocyst stage. However, PbICP-negative sporozoites liberated from oocysts exhibited defective motility and invaded mosquito salivary glands in low numbers. They were also unable to invade hepatocytes, confirming that control of cysteine protease activity is of critical importance for sporozoites. Importantly, transfection of PbICP-knockout parasites with a pbicp-gfp construct fully reversed these defects. Taken together, in P. berghei this inhibitor of the ICP family is essential for sporozoite motility but also appears to play a role during parasite development in hepatocytes and erythrocytes.
El conjunto habitacional Las Américas, un laboratorio para la edificación de una microsociedad
Jacquin, Céline;
Alteridades , 2007,
Abstract: in a recent social housing estate of mexico's periphery, conditions of life, mobility as well as immobility patterns generate a certain isolation for the mass of population reunited there, making it a self-contained territory of life. the differential practices confined within it as well as the coexistence of different but close social layers, stimulate specific schemes of interaction that conform the neighborhood as a living arena where strategies of exclusion and inclusion are revealed according to larger principles of social identification.
L'experience d'ecrire: construction d'un lieu extra-topique
Masson, Céline;
Psicologia & Sociedade , 2009, DOI: 10.1590/S0102-71822009000400015
Abstract: in this article, i will develop ideas of writing as a place of revival time events (old sensations not yet "psychisées"). in this time of the narrative, writing of itself, everything becomes an image, everything is projected in the visible space "extime" as lacan said but yet this outside forum is inaccessible. words are the witnesses of that time of a memory open to the faces, but faces that became phantom-faces. the time of writing is the time of the return of faces in images distorted by the work of time: this psychic time changes the perceptions and offers another view.
Cavalhadas em Pirenópolis: tradi??es e sociabilidade no interior de Goiás
Spinelli, Céline;
Religi?o & Sociedade , 2010, DOI: 10.1590/S0100-85872010000200004
Abstract: this article approaches aspects of pirenópolis's culture through one party annually carried out: the cavalhadas, a religious rite that integrates the traditional holy spirit festival. the stage of the party, pirenópolis, is a small town in the state of goiás, mid-west of brazil. it is characterized by a close relation between the urban universe and the rural one. for the local population, the party represents an important socialization moment, when collective values are shared. through the religious celebration a notion of collective belonging to a community of believers is created; moreover, some local culture elements are reinforced. based in an ethnographic perspective, we'll analyze: the familiar dimension of the festivity process; differences about gender's way of significating the party experience; meanings involved in the cavalhada's representation.
THE LACK OF POLITICAL RESPONSIBILITY OF THE FRENCH PRESIDENT UNDER THE CONSTITUTION OF 1958 AND THE OLD ARTICLE 68
Lageot,Céline;
Vniversitas , 2009,
Abstract: since 1962 and except in the political context of cohabitation, the french president has become the first leader of the political system, instead of the government and the prime minister. however, in regard with article 20, 67 and 68 of the constitution, the head of state is still not politically responsible. until the constitutional revision in february 23, 2007, there was only one exception to this principle, the case of "high treason". "the president of the republic is responsible for the acts achieved in the performance of his duties only in the event of high treason", said the old article 68. not only was the procedure exceptional for the head of state but also the jurisdiction. he could only have been judged in this context by the high court of justice. the constitutional council widened the principle of the immunity of the head of state in a controversial decision in 1999 but the "cour de cassation" contradicted the constitutional council while returning to the traditional principle of temporary immunity in its major decision breisacher in 2001. in order to calm down many of the politicians and lawyers, the chirac candidate advanced in his electoral program of 2002 the idea of the meeting of a commission to think of the criminal status of the head of state. the old procedure of "high treason" is nowadays dead; the high court of justice too. all that has been changed in february 23, 2007 into a new procedure of "dismissal", in accordance with the conclusions of the "avril commission".
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