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1

24. Tama~nos y distancias celestes Matematicas II, 2012-II 24. Tama~nos y distancias celestes  

E-print Network

´on): dTL dTS = DL DS , donde DS es el di´ametro del Sol, dTL la distancia de la Tierra a la Luna y dTS la calcular la otra. De manera similar tenemos S = DS dTS . (24.5) 24-3 #12;Matem´aticas II, 2012-II 24.

Barot, Michael

2

PSC 424: Kingdom Plantae  

NSDL National Science Digital Library

A 12th grade lesson on the characteristics of Kingdom Plantae, photosynthesis and cellular respiration Kingdom Plantae Plantae Unit PowerPoint Use these fun songs to review plant processes! Cell Respiration - Cellular Respiration Song Photosynthesis Rap

Webb, Mrs.

2011-10-12

3

PREJUICIO Y DISTANCIA SOCIAL HACIA PERSONAS HOMOSEXUALES POR PARTE DE JVENES UNIVERSITARIOS  

PubMed Central

Se realiz un estudio descriptivo transversal con el propsito de explorar actitudes de rechazo y distancia social hacia las personas gays y lesbianas (GL) en 565 universitarios. Se utiliz una escala para medir Prejuicio y otra escala para medir Distancia Social. Los participantes reflejaron niveles moderados de prejuicio y distancia social (DS) hacia las personas gays y lesbianas. Los varones (M=104.5, DT= 27.47) mostraron significativamente ms prejuicio que las mujeres (M=98.8, DT= 23.41). Los hombres (M=22.7, DT= 7.00) mostraron significativamente mayor DS que las mujeres (M=21.1, DT= 5.41). Las personas que asisten con regularidad a la iglesia mostraron ms prejuicio y DS que los que no asisten. Se analiza importancia de incluir el tema de la diversidad sexual a travs del currculo para desmontar prejuicios hacia la comunidad homosexual. PMID:25606066

Fernndez Rodrguez, Mara del C.; Squiabro, Jos Caldern

2014-01-01

4

El teatro argentino actual: Entre la modernidad y la tradicin  

E-print Network

especialistas de este teatro, hemos tenido la posibilidad de ver algunas producciones en los ltimos cinco aos. Lo que hace pensar, y de cierta forma resulta sorprendente, es la radical distancia que media entre diferentes espectculos en un mismo espacio... continente, ha sido siempre marcado por estticas y prcticas escnica europeizantes, con lo cual no deseamos sostener que no exista una tradicin teatral propia. El problema no reside en lo que se adopta, sino en cmo se utiliza lo adoptado. Brecht tom...

Toro, Fernando de

1991-04-01

5

In planta gene targeting  

PubMed Central

The development of designed site-specific endonucleases boosted the establishment of gene targeting (GT) techniques in a row of different species. However, the methods described in plants require a highly efficient transformation and regeneration procedure and, therefore, can be applied to very few species. Here, we describe a highly efficient GT system that is suitable for all transformable plants regardless of transformation efficiency. Efficient in planta GT was achieved in Arabidopsis thaliana by expression of a site-specific endonuclease that not only cuts within the target but also the chromosomal transgenic donor, leading to an excised targeting vector. Progeny clonal for the targeted allele could be obtained directly by harvesting seeds. Targeted events could be identified up to approximately once per 100 seeds depending on the target donor combination. Molecular analysis demonstrated that, in almost all events, homologous recombination occurred at both ends of the break. No ectopic integration of the GT vector was found. PMID:22529367

Fauser, Friedrich; Roth, Nadine; Pacher, Michael; Ilg, Gabriele; Snchez-Fernndez, Roco; Biesgen, Christian; Puchta, Holger

2012-01-01

6

Plantas crucferas y la prevencin del cncer  

Cancer.gov

Hoja informativa que resume los resultados de estudios sobre las plantas crucferas y el cncer. Incluye una lista de plantas crucferas y las guas alimenticias recomendadas para el consumo de verduras.

7

Abono para la planta medicinal Cobra fuerza en la Isla el estudio del valor teraputico de la flora tropical.  

E-print Network

que "muchas plantas americanas (como el tabaco, que se preparaba de diferentes maneras), eran de a otros colegas e investigadores de la Escuela de Farmacia. Entre ellos, figuran Ana Vélez, Ricardo pasos para que este logre la acreditación de la Asociación Americana de Museos. Jardín con historia A su

Quirk, Gregory J.

8

Non-random sharing of Plantae genes.  

PubMed

The power of eukaryote genomics relies strongly on taxon sampling. This point was underlined in a recent analysis of red algal genome evolution in which we tested the Plantae hypothesis that posits the monophyly of red, green (including plants) and glaucophyte algae. The inclusion of novel genome data from two mesophilic red algae enabled us to robustly demonstrate the sisterhood of red and green algae in the tree of life. Perhaps more exciting was the finding that >1,800 putative genes in the unicellular red alga Porphyridium cruentum showed evidence of gene-sharing with diverse lineages of eukaryotes and prokaryotes. Here we assessed the correlation between the putative functions of these shared genes and their susceptibility to transfer. It turns out that genes involved in complex interactive networks such as biological regulation and transcription/translation are less susceptible to endosymbiotic or horizontal gene transfer, when compared to genes with metabolic and transporter functions. PMID:21980581

Chan, Cheong Xin; Bhattacharya, Debashish

2011-05-01

9

PATHOLOGIE VGTALE Interactions entre virus ou entre virus et leurs  

E-print Network

PATHOLOGIE V?G?TALE SYNTH?SE Interactions entre virus ou entre virus et leurs satellites chez un 84140 Montfavet R?SUM? Deux ou plusieurs virus, apparentés ou non, peuvent se multiplier ensemble dans une même plante et également dans une même cellule. Les interactions entre virus qui en résultent

Paris-Sud XI, Université de

10

Hyperthermophilic endoglucanase for in planta lignocellulose conversion  

PubMed Central

Background The enzymatic conversion of lignocellulosic plant biomass into fermentable sugars is a crucial step in the sustainable and environmentally friendly production of biofuels. However, a major drawback of enzymes from mesophilic sources is their suboptimal activity under established pretreatment conditions, e.g. high temperatures, extreme pH values and high salt concentrations. Enzymes from extremophiles are better adapted to these conditions and could be produced by heterologous expression in microbes, or even directly in the plant biomass. Results Here we show that a cellulase gene (sso1354) isolated from the hyperthermophilic archaeon Sulfolobus solfataricus can be expressed in plants, and that the recombinant enzyme is biologically active and exhibits the same properties as the wild type form. Since the enzyme is inactive under normal plant growth conditions, this potentially allows its expression in plants without negative effects on growth and development, and subsequent heat-inducible activation. Furthermore we demonstrate that the recombinant enzyme acts in high concentrations of ionic liquids and can therefore degrade ?-cellulose or even complex cell wall preparations under those pretreatment conditions. Conclusion The hyperthermophilic endoglucanase SSO1354 with its unique features is an excellent tool for advanced biomass conversion. Here we demonstrate its expression in planta and the possibility for post harvest activation. Moreover the enzyme is suitable for combined pretreatment and hydrolysis applications. PMID:22928996

2012-01-01

11

Influencia de la fecha de siembra y distancia entre surcos sobre el establecimiento de asociaciones de desmanthus y el pasto klein Influence of row-spacing and planting date on the establishment of bundleflower-kleingrass mixtures  

Microsoft Academic Search

Understanding factors that affect the establishment of pastures is important to the management of persistent grass-legume mixtures. The objective of this study was to evaluate kleingrass (Panicum coloratum L.)-bundeflower (Desmanthus sp.) associations during the establishment year in terms of plant density and yield. The study was carried out at Brazos County, TX. (near College Station). Plots were drilled at a

Eduardo A. Gonzlez Valenzuela; Mark A. Hussey

12

Accidentes en plantas nucleares de electricidad y el riesgo de cncer  

Cancer.gov

Hoja informativa acerca de los riesgos del cncer asociados con accidentes en plantas nucleares de electricidad. Incluye informacin para pacientes con cncer que viven en una zona que puede haber sido afectada por un accidente en una planta nuclear.

13

La Transpiración - Movimiento del Agua a Través de las Plantas  

NSDL National Science Digital Library

La transpiración es la pérdida de agua en forma de vapor por las plantas. El agua es absorbida del suelo por las raíces y transportada en forma líquida por el xilema hacia las hojas. En las hojas, unos pequeos poros permiten que el agua (H2O) escape a la atmósfera en forma de vapor, al tiempo que se permite la entrada de bióxido de carbono (CO2) para la fotosíntesis. De toda el agua absorbida por las plantas, menos del 5% es retenida y utilizada para crecimiento y almacenamiento. En esta lección se explicará porque las plantas pierden tanta agua, la ruta que ésta sigue dentro de la planta, como pudieran las plantas controlar la pérdida excesiva de agua y como las condiciones ambientales influyen en la pérdida de agua por las plantas.

14

In planta production of indole-3-acetic acid by Colletotrichum gloeosporioides f. sp. aeschynomene.  

PubMed

The plant pathogenic fungus Colletotrichum gloeosporioides f. sp. aeschynomene utilizes external tryptophan to produce indole-3-acetic acid (IAA) through the intermediate indole-3-acetamide (IAM). We studied the effects of tryptophan, IAA, and IAM on IAA biosynthesis in fungal axenic cultures and on in planta IAA production by the fungus. IAA biosynthesis was strictly dependent on external tryptophan and was enhanced by tryptophan and IAM. The fungus produced IAM and IAA in planta during the biotrophic and necrotrophic phases of infection. The amounts of IAA produced per fungal biomass were highest during the biotrophic phase. IAA production by this plant pathogen might be important during early stages of plant colonization. PMID:15006816

Maor, Rudy; Haskin, Sefi; Levi-Kedmi, Hagit; Sharon, Amir

2004-03-01

15

Programmable Plants: Development of an in planta System for the Remote Monitoring and Control of Plant Function for Life Support  

Microsoft Academic Search

In this Phase I study we explored the revolutionary concept of using genomics and nanotechnology together for the development of plants with traits suitable for human life support in non -Earth environments. This includes the potential for the use of remote monitoring and control devices in planta and ex planta as part of an overall architecture of human and autonomous

Christopher S. Brown

16

Captulo 1 Redes complejas de interacciones mutualistas planta-animal 17  

E-print Network

#12;Capítulo 1 Redes complejas de interacciones mutualistas planta-animal 17 CAPÍTULO 1 Redes aproximación transdisciplinaria de redes complejas ( Jordano, 1987; Müller et al., 1999; Memmott y Waser, 2002; Montoya et al., 2006; Bascompte y Jordano, 2007). El enfoque de redes complejas al estudio de

Jordano, Pedro

17

Article original Entre neurosciences et neurophilosophie  

E-print Network

essential to clearly situ- ate its contribution to the origin and the development of the cognitive sciencesArticle original Entre neurosciences et neurophilosophie : la psychologie cognitive et les sciences cognitives Between neuroscience and neurophilosophy: cognitive psychology and cognitive science G. Tiberghien

Dominey, Peter F.

18

Article original Relations gntiques entre populations  

E-print Network

and European cattle breeds. The polymorphism of 16 genetic systems, the 11 known blood group systems in cattle and correspondence analysis in an attempt to clarify the genetic relationships bet- ween these populations. Since 12Article original Relations génétiques entre populations de taurins ou zébus d'Afrique de l'Ouest et

Boyer, Edmond

19

Interactions plasma entre exoplantes et toiles parentes  

E-print Network

Interactions « plasma » entre exoplanètes et étoiles parentes Philippe Zarka LESIA, Observatoire de Paris/CNRS, Meudon philippe.zarka@obspm.fr "Ecole thématique de Physique Stellaire", Oléron, 6 septembre prépondérante à la distance d'un HJ cf. figure de Zarka et al. 2001 aussi ici en dia. 47) [4] HJ : B stellaire

Demoulin, Pascal

20

Chlamydiae Has Contributed at Least 55 Genes to Plantae with Predominantly Plastid Functions  

PubMed Central

Background The photosynthetic organelle (plastid) originated via primary endosymbiosis in which a phagotrophic protist captured and harnessed a cyanobacterium. The plastid was inherited by the common ancestor of the red, green (including land plants), and glaucophyte algae (together, the Plantae). Despite the critical importance of primary plastid endosymbiosis, its ancient derivation has left behind very few footprints of early key events in organelle genesis. Methodology/Principal Findings To gain insights into this process, we conducted an in-depth phylogenomic analysis of genomic data (nuclear proteins) from 17 Plantae species to identify genes of a surprising provenance in these taxa, Chlamydiae bacteria. Previous studies show that Chlamydiae contributed many genes (at least 21 in one study) to Plantae that primarily have plastid functions and were postulated to have played a fundamental role in organelle evolution. Using our comprehensive approach, we identify at least 55 Chlamydiae-derived genes in algae and plants, of which 67% (37/55) are putatively plastid targeted and at least 3 have mitochondrial functions. The remainder of the proteins does not contain a bioinformatically predicted organelle import signal although one has an N-terminal extension in comparison to the Chlamydiae homolog. Our data suggest that environmental Chlamydiae were significant contributors to early Plantae genomes that extend beyond plastid metabolism. The chlamydial gene distribution and protein tree topologies provide evidence for both endosymbiotic gene transfer and a horizontal gene transfer ratchet driven by recurrent endoparasitism as explanations for gene origin. Conclusions/Significance Our findings paint a more complex picture of gene origin than can easily be explained by endosymbiotic gene transfer from an organelle-like point source. These data significantly extend the genomic impact of Chlamydiae on Plantae and show that about one-half (30/55) of the transferred genes are most closely related to sequences emanating from the genome of the only environmental isolate that is currently available. This strain, Candidatus Protochlamydia amoebophila UWE25 is an endosymbiont of Acanthamoeba and likely represents the type of endoparasite that contributed the genes to Plantae. PMID:18493612

Bhattacharya, Debashish

2008-01-01

21

Screening for in planta protein-protein interactions combining bimolecular fluorescence complementation with flow cytometry  

PubMed Central

Understanding protein and gene function requires identifying interaction partners using biochemical, molecular or genetic tools. In plants, searching for novel protein-protein interactions is limited to protein purification assays, heterologous in vivo systems such as the yeast-two-hybrid or mutant screens. Ideally one would be able to search for novel protein partners in living plant cells. We demonstrate that it is possible to screen for novel protein-protein interactions from a random library in protoplasted Arabidopsis plant cells and recover some of the interacting partners. Our screen is based on capturing the bi-molecular complementation of mYFP between an YN-bait fusion partner and a completely random prey YC-cDNA library with FACS. The candidate interactions were confirmed using in planta BiFC assays and in planta FRET-FLIM assays. From this work, we show that the well characterized protein Calcium Dependent Protein Kinase 3 (CPK3) interacts with APX3, HMGB5, ORP2A and a ricin B-related lectin domain containing protein At2g39050. This is one of the first randomin planta screens to be successfully employed. PMID:22789293

2012-01-01

22

Caracterizao socio-econmico-cultural de raizeiros e procedimentos ps-colheita de plantas medicinais comercializadas em Macei, AL  

Microsoft Academic Search

RESUMO: Objetivou-se, com este trabalho, estabelecer o perfil scio-econmico-cultural de raizeiros, bem como executar um levantamento dos procedimentos ps-colheita para as plantas medicinais comercializadas em feiras e mercados ao ar livre na cidade de Macei, AL. Foram abordados aspectos sociais, econmicos e culturais de 46 raizeiros, bem como os procedimentos ps-colheita adotados para a conservao das plantas medicinais comercializadas no

Csar de Arajo

23

Aplicaciones prácticas de la fisiología de los herbicidas en las plantas  

NSDL National Science Digital Library

Esta leccin se focaliza en el impacto de las caractersticas de la planta y el herbicida, importantes para determinar el desempeo del herbicida. Se usarn imgenes visuales para ilustrar varios principios, incluyendo el sitio de absorcin del herbicida en la planta, transporte, el sitio de accin sensible, y efectos del ambiente sobre el desempeo del herbicida. Esta informacin provee la base para maximizar la utilidad del uso de los herbicidas.

24

EntreWorld: Resources for Entrepreneurs  

NSDL National Science Digital Library

Looking to make that first million? Then EntreWorld, provided by the Ewing Marion Kauffman Foundation, is an excellent place to begin. The site is highlighted by four sections: starting your business, running your business, rapid growth, and supporting entrepreneurship. The first two sections allow users to select from an interactive search box of several topics, and retrieve annotated articles from various Internet sources. The fourth contains a potpourri of information including annotated pointers to other Internet resources in six major subject areas (pointers are also available from the Business Center area of each major section). The number of article pointers, and the annotation of each, make this site worth a visit.

2007-05-14

25

i Planta  

Technology Transfer Automated Retrieval System (TEKTRAN)

This application was designed for farmers, agriculture researchers, and gardeners. The application includes a calculator, a data logger, and a GPS mapping function. It was designed for vegetable farming but can be used for open field applications. The calculator solves for the amount of pesticide,...

26

AtHKT1 Facilitates Na+ Homeostasis and K+ Nutrition in Planta1  

PubMed Central

Genetic and physiological data establish that Arabidopsis AtHKT1 facilitates Na+ homeostasis in planta and by this function modulates K+ nutrient status. Mutations that disrupt AtHKT1 function suppress NaCl sensitivity of sos1-1 and sos2-2, as well as of sos3-1 seedlings grown in vitro and plants grown in controlled environmental conditions. hkt1 suppression of sos3-1 NaCl sensitivity is linked to higher Na+ content in the shoot and lower content of the ion in the root, reducing the Na+ imbalance between these organs that is caused by sos3-1. AtHKT1 transgene expression, driven by its innate promoter, increases NaCl but not LiCl or KCl sensitivity of wild-type (Col-0 gl1) or of sos3-1 seedlings. NaCl sensitivity induced by AtHKT1 transgene expression is linked to a lower K+ to Na+ ratio in the root. However, hkt1 mutations increase NaCl sensitivity of both seedlings in vitro and plants grown in controlled environmental conditions, which is correlated with a lower K+ to Na+ ratio in the shoot. These results establish that AtHKT1 is a focal determinant of Na+ homeostasis in planta, as either positive or negative modulation of its function disturbs ion status that is manifested as salt sensitivity. K+-deficient growth of sos1-1, sos2-2, and sos3-1 seedlings is suppressed completely by hkt1-1. AtHKT1 transgene expression exacerbates K+ deficiency of sos3-1 or wild-type seedlings. Together, these results indicate that AtHKT1 controls Na+ homeostasis in planta and through this function regulates K+ nutrient status. PMID:15347798

Rus, Ana; Lee, Byeong-ha; Muoz-Mayor, Alicia; Sharkhuu, Altanbadralt; Miura, Kenji; Zhu, Jian-Kang; Bressan, Ray A.; Hasegawa, Paul M.

2004-01-01

27

Dynamic root exudation of sorgoleone and its in planta mechanism of action  

PubMed Central

The oily droplets exuded from the root hairs of sorghum are composed of a 1:1 ratio of sorgoleone and its lipid resorcinol analogue. The production of these droplets appears to be suppressed when c. 20 ?g of exudate mg?1 root dry weight accumulates at the tip of the root hairs. However, more exudate is produced following gentle washing of the roots with water, suggesting that the biosynthesis of lipid benzoquinones and resorcinols is a dynamic process. Sorgoleone interferes with several molecular target sites, including photosynthetic electron transport, in in vitro assays. However, the in planta mechanism of action of sorgoleone remains controversial because it is not clear whether this lipid benzoquinone exuding from the roots of sorghum is taken up by roots of the receiving plants and translocated to their foliage where it must enter the chloroplast and inhibit PSII in the thylakoid membrane. Experiments designed to test the in planta mode of action of sorgoleone demonstrated that it has no effect on the photosynthesis of older plants, but inhibits photosynthesis in germinating seedlings. Sorgoleone is not translocated acropetally in older plants, but can be absorbed through the hypocotyl and cotyledonary tissues. Therefore, the mode of action of sorgoleone may be the result of inhibition of photosynthesis in young seedlings in concert with inhibition of its other molecular target sites in older plants. PMID:19357432

Dayan, Franck E.; Howell, J'Lynn; Weidenhamer, Jeffrey D.

2009-01-01

28

La coordinacin entre niveles asistenciales: del discurso al proyecto transformador  

Microsoft Academic Search

La falta de coordinacin entre los diferentes niveles asistenciales, y particularmente entre atencin primaria y hospitales ha suscitado miles de artculos, debates tcnicos y polmicas encendidas, pero escasos avances prcticos. La persistencia del problema se debe indudablemente a su complejidad, porque la existencia de talento y experiencia generosamente distribuido en el sistema sanitario en teora deberan haber provocado el desarrollo

Raimon Belenes

2009-01-01

29

Vers de nouvelles interactions entre les Suds ? L'exemple des liens entre Madagascar et l'Afrique du Sud  

E-print Network

1 Vers de nouvelles interactions entre les Suds ? L'exemple des liens entre Madagascar et l du continent, et le pays pauvre voisin, Madagascar, s'inscrivent dans cette dynamique. L'article examine l'intérêt sud-africain pour Madagascar à l'échelle du continent africain et dans le contexte de

Paris-Sud XI, Université de

30

Mexican papita viroid and tomato planta macho viroid belong to a single species in the genus Pospiviroid  

Technology Transfer Automated Retrieval System (TEKTRAN)

Tomato planta macho viroid (TPMVd) and Mexican papita viroid (MPVd) are two closely-related (>90% sequence identity) members of the genus Pospiviroid. Their current status as separate species is based upon the reported ability of TPMVd to replicate in Gomphrena globosa and the inability of this viro...

31

G. Leubner-Metzger et al.: -1,3-Glucanase and tobacco seed germination Planta (1996) 199: 282-288  

E-print Network

G. Leubner-Metzger et al.: ?-1,3-Glucanase and tobacco seed germination - 1 - Planta (1996) 199,3-glucanase induction in tobacco seed germination Gerhard Leubner-Metzger, Corinne Fründt, Frederick Meins, Jr.g. 10-5 M GA4 or GA7) can substitute for light in releasing dormancy. Measurements of ?-1,3-glucanase

Leubner, Gerhard

32

In planta transformation method for T-DNA transfer in orchids  

NASA Astrophysics Data System (ADS)

Transgenic plant technology is an efficient tool to study the function of gene(s) in plant. The most popular and widely used technique is Agrobacterium-mediated transformation in which cocultivation was done by immersing the plant tissues/organ in overnight bacterial cultured for about 30 minutes to one hour under in vitro condition. In this experiment, we developed more easier technique that omitted the in vitro step during cocultivation with Agrobacterium, namely in planta transformation method. Pollinaria (compact pollen mass of orchid) of Phalaenopsis amabilis and Spathoglottis plicata orchids were used as target explants that were immersed into bacterial culture for 30 minutes, then dried up the pollinaria, the transformed pollinaria was used to pollinate orchid flowers. The T-DNA used for this experiments were Ubipro?PaFT/A. tumefaciens GV3101 for P. amabilis and MeEF1?2 pro?GUS/ A. tumefaciens LBA 4404 for S.plicata. Seeds that were produced from pollinated flowers were grown onto 10 mg/l hygromicin containing NP (New Phalaenopsis) medium. The existance of transgene in putative transformant protocorm (developing orchid embryo) genome was confirmed using PCR with specific primers of either PaFT or GUS genes. Histochemical GUS assay was also performed to the putative transformants. The result showed that transformation frequencies were 2.1 % in P. amabilis, and 0,53% in S. plicata. These results indicates that in planta transformation method could be used for Agrobacterium-mediated genetic transformation, with advantage easier and more secure work from contaminants than that of the in vitro method.

Semiarti, Endang; Purwantoro, Aziz; Mercuriani, Ixora S.; Anggriasari, Anida M.; Jang, Seonghoe; Suhandono, Sony; Machida, Yasunori; Machida, Chiyoko

2014-03-01

33

Pathologie vgtale Relation entre le pH des sols  

E-print Network

Pathologie végétale Relation entre le pH des sols et leur niveau de réceptivité à Fusarium solani pH des sols et leur niveau de réceptivité à Fusarium roseum var sambu- cinum et à F solani var sols de culture dont les pH s'échelonnent de 5,1 à 6,2, un lien direct existe entre les faibles valeurs

Paris-Sud XI, Université de

34

Native-sized spider silk proteins synthesized in planta via intein-based multimerization.  

PubMed

The synthesis of native-sized proteins is a pre-requisite for exploiting the potential of spider silk as a bio-based material. The unique properties of spider silk, such as extraordinary tensile strength and elasticity, result from the highly repetitive nature of spider silk protein motifs. The present report describes the combination of spider silk flagelliform protein (FLAG) production in the endoplasmic reticulum of tobacco plant leaf cells with an intein-based posttranslational protein fusion technology. The repeated ligation of FLAG monomers resulted in the formation of large multimers. This method avoids the need for highly repetitive transgenes, which may result in a higher genetic and transcriptional stability. Here we show, for the first time, the production of synthetic, high molecular weight spider silk proteins larger than 250kDa based on the assembly of protein monomers via intein-mediated trans-splicing in planta. The resulting multimeric structures form microfibers, thereby demonstrating their great potential as a biomaterial. PMID:23001519

Hauptmann, Valeska; Weichert, Nicola; Menzel, Matthias; Knoch, Dominic; Paege, Norman; Scheller, Jrgen; Spohn, Uwe; Conrad, Udo; Gils, Mario

2013-04-01

35

Analysis of in planta Expressed Orphan Genes in the Rice Blast Fungus Magnaporthe oryzae  

PubMed Central

Genomes contain a large number of unique genes which have not been found in other species. Although the origin of such orphan genes remains unclear, they are thought to be involved in species-specific adaptive processes. Here, we analyzed seven orphan genes (MoSPC1 to MoSPC7) prioritized based on in planta expressed sequence tag data in the rice blast fungus, Magnaporthe oryzae. Expression analysis using qRT-PCR confirmed the expression of four genes (MoSPC1, MoSPC2, MoSPC3 and MoSPC7) during plant infection. However, individual deletion mutants of these four genes did not differ from the wild-type strain for all phenotypes examined, including pathogenicity. The length, GC contents, codon adaptation index and expression during mycelial growth of the four genes suggest that these genes formed during the evolutionary history of M. oryzae. Synteny analyses using closely related fungal species corroborated the notion that these genes evolved de novo in the M. oryzae genome. In this report, we discuss our inability to detect phenotypic changes in the four deletion mutants. Based on these results, the four orphan genes may be products of de novo gene birth processes, and their adaptive potential is in the course of being tested for retention or extinction through natural selection. PMID:25506301

Sadat, Abu; Jeon, Junhyun; Mir, Albely Afifa; Kim, Seongbeom; Choi, Jaeyoung; Lee, Yong-Hwan

2014-01-01

36

Rad54 is not essential for any geminiviral replication mode in planta.  

PubMed

The circular single-stranded DNA of phytopathogenic geminiviruses is propagated by three modes: complementary strand replication (CSR), rolling circle replication (RCR) and recombination-dependent replication (RDR), which need host plant factors to be carried out. In addition to necessary host polymerases, proteins of the homologous recombination repair pathway may be considered essential, since geminiviruses are particularly prone to recombination. Among several others, Rad54 was suggested to be necessary for the RCR of Mungbean yellow mosaic India virus. This enzyme is a double-stranded DNA-dependent ATPase and chromatin remodeller and was found to bind and modulate the viral replication-initiator protein in vitro and in Saccharomyces cerevisiae. In contrast to the previous report, we scrutinized the requirement of Rad54 in planta for two distinct fully infectious geminiviruses with respect to the three replication modes. Euphorbia yellow mosaic virus and Cleome leaf crumple virus were inoculated into Rad54-deficient and wildtype Arabidopsis thaliana plant lines to compare the occurrence of viral DNA forms. Replication intermediates were displayed in the time course of infection by one and two-dimensional agarose gel electrophoresis and Southern hybridization. The experiments showed that Rad54 was neither essential for CSR, RCR nor RDR, and it had no significant influence on virus titers during systemic infection. PMID:25492528

Richter, Kathrin S; Ende, Lukas; Jeske, Holger

2015-01-01

37

In planta selfing and oospore production of Phytophthora cinnamomi in the presence of Acacia pulchella.  

PubMed

This paper provides the first evidence of A2 type 1 and type 2 isolates of Phytophthora cinnamomi producing selfed oospores in planta in an Australian soil and in a potting mix. Oospores were observed in infected lupin (Lupinus angustifolius) roots incubated for 7d either in the substrate under potted Acacia pulchella plants, or in soils collected from under and near varieties of A. pulchella in jarrah (Eucalyptus marginata) forest. The A2 type isolates varied in their ability to produce selfed oospores and none were produced by A1 isolates. The gametangial association was amphigynous and spores were predominantly spherical with diameters from 13-40 microm. The oospores were viable but dormant. Two A2 type isolates produced small numbers of selfed oospores with amphigynous antheridia axenically in Ribeiro's liquid medium within 30 d, and one A2 type 2 isolate produced oospores after mating with an A1 strain. Evidence is presented that the presence of roots of Acacia pulchella, and particularly A. pulchella var. glaberrima and var. goadbyi, enhances the production of oospores. PMID:17350243

Jayasekera, Arunodini U; McComb, Jen A; Shearer, Bryan L; Hardy, Giles E St J

2007-03-01

38

Rapid in planta evaluation of root expressed transgenes in chimeric soybean plants.  

PubMed

Production of stable transgenic plants is one factor that limits rapid evaluation of tissue specific transgene expression. To hasten the assessment of transgenes in planta, we evaluated the use of chimeric soybean seedlings expressing transgenic products in roots. Tap roots from four-day old seedlings (cultivars 'Jack' and KS4704) were excised and hairy roots were induced from hypocotyls via Agrobacterium rhizogenes-mediated transformation. Inoculated hypocotyls were screened on a MS-based medium containing either 200 mg/L kanamycin or 20 mg/L hygromycin. Beta-glucuronidase (GUS) activity assay indicated that highest GUS expression was observed in hypocotyls exposed to a 4-d pre-inoculation time, a neutral pH (7.0) for the co-cultivation medium. A 170-bp of the Fib-1 gene and 292-bp of the Y25C1A.5 gene fragments, both related to nematode reproduction and fitness, were cloned independently into pANDA35HK vector using a Gateway cloning strategy. The resulting RNAi constructs of the genes fragments were transformed into soybean using the chimeric hairy root system and evaluated for its effect on soybean cyst nematode (Heterodera glycines) fecundity. Confirmation of transformation was attained by polymerase chain reaction and Southern-blot analysis, and some potential for suppression of H. glycines reproduction was detected for the two constructs. This method takes on average four weeks to produce chimeric plants ready for transgene analysis. PMID:20012965

Li, Jiarui; Todd, Timothy C; Trick, Harold N

2010-02-01

39

Characterization of VIP1 activity as a transcriptional regulator in vitro and in planta  

PubMed Central

VIP1 (VirE2 interacting protein 1), initially discovered as a host protein involved in Agrobacterium-plant cell DNA transfer, is a transcription factor of the basic leucine-zipper (bZIP) domain family that regulates several defence-related genes in Arabidopsis. We have developed assays to assess VIP1 binding to its DNA target in vitro and transcriptional activation efficiency in planta. Several point mutations in the VIP1 response element VRE affected the VIP1 activity, and a strong correlation between VIP1-VRE binding and transcriptional activation levels was observed. Promoter activation by VIP1 was influenced by bacterial and plant proteins known to interact with VIP1 during Agrobacterium infection, i.e., VirE2, VirF and VIP2. VirF, an F-box protein, strongly decreased VIP1 transcriptional activation ability, but not its binding to VRE in vitro, most likely by triggering proteasomal degradation of VIP1. Finally, activation of a VRE-containing promoter was observed in dividing cells, probably resulting from activation of endogenous VIP1. PMID:23942522

Lacroix, Benot; Citovsky, Vitaly

2013-01-01

40

In planta Production of Flock House Virus Transencapsidated RNA and Its Potential Use as a Vaccine.  

PubMed

We have developed a transencapsidated vaccine delivery system based on the insect virus, Flock House virus (FHV). FHV is attractive due to its small genome size, simple organization, and nonpathogenic characteristics. With the insertion of a Tobacco mosaic virus (TMV) origin of assembly (Oa), the independently replicating FHV RNA1 can be transencapsidated by TMV coat protein. In this study, we demonstrated that the Oa-adapted FHV RNA1 transencapsidation process can take place in planta, by using a bipartite plant expression vector system, where TMV coat protein is expressed by another plant virus vector, Foxtail mosaic virus (FoMV). Dual infection in the same cell by both FHV and FoMV was observed. Though an apparent classical coat protein-mediated resistance repressed FHV expression, this was overcome by delaying inoculation of the TMV coat protein vector by 3 days after FHV vector inoculation. Expression of thetransgene marker in animals by these in vivo-generated transencapsidated nanoparticles was confirmed by mouse vaccination, which also showed an improved vaccine response compared to similar in vitro-produced vaccines. PMID:25432792

Zhou, Yiyang; Maharaj, Payal D; Mallajosyula, Jyothi K; McCormick, Alison A; Kearney, Christopher M

2014-11-29

41

Assessment of factors influencing the Agrobacterium-mediated in planta seed transformation of brinjal (Solanum melongena L.).  

PubMed

An efficient and reproducible in planta transformation method was developed for brinjal using seed as an explant. The brinjal seeds were infected with Agrobacterium tumefaciens EHA 105 harbouring pCAMBIA 1301-bar plasmid, and the transformants were selected against BASTA. Several parameters influencing the in planta seed transformation such as pre-culture duration, acetosyringone concentration, surfactants, duration of sonication, vacuum pressure and vacuum duration have been evaluated. The putatively transformed (T 0) brinjal plants were screened by GUS histochemical analysis. Among the different combinations and concentrations tested, when the 18-h pre-cultured brinjal seeds were sonicated for 20min and vacuum infiltered for 3min at 500mm of Hg in Agrobacterium suspension containing 100?M acetosyringone, 0.2% Silwett L-77 favoured the Agrobacterium infection and showed maximum transformation efficiency. Among the five brinjal varieties evaluated, Arka Samhitha showed maximum transformation efficiency at 45.66%. The transgene was successfully transmitted to progeny plants (T 1) which was evidenced by GUS histochemical analysis, polymerase chain reaction and Southern hybridisation. The in planta protocol developed in the present study would be beneficial to transfer the economically and nutritionally important genes into different varieties of brinjal, and the transgenic brinjal plants can be produced in less time (approximately 27days). PMID:23852797

Subramanyam, Kondeti; Rajesh, Manoharan; Jaganath, Balusamy; Vasuki, Amirthalingam; Theboral, Jeevaraj; Elayaraja, Dhandapani; Karthik, Sivabalan; Manickavasagam, Markandan; Ganapathi, Andy

2013-09-01

42

Floral benzenoid carboxyl methyltransferases: From in vitro to in planta function  

PubMed Central

Benzenoid carboxyl methyltransferases synthesize methyl esters (e.g., methyl benzoate and methyl salicylate), which are constituents of aromas and scents of many plant species and play important roles in plant communication with the surrounding environment. Within the past five years, eleven such carboxyl methyltransferases were isolated and most of them were comprehensively investigated at the biochemical, molecular and structural level. Two types of enzymes can be distinguished according to their substrate preferences: the SAMT-type enzymes isolated from Clarkia breweri, Stephanotis floribunda, Antirrhinum majus, Hoya carnosa, and Petunia hybrida, which have a higher catalytic efficiency and preference for salicylic acid, while BAMT-type enzymes from A. majus, Arabidopsis thaliana, Arabidopsis lyrata, and Nicotiana suaveolens prefer benzoic acid. The elucidation of C. breweri SAMTs three-dimensional structure allowed a detailed modelling of the active sites of the carboxyl methyltransferases and revealed that the SAM binding pocket is highly conserved among these enzymes while the methyl acceptor binding site exhibits some variability, allowing a classification into SAMT-type and BAMT-type enzymes. The analysis of expression patterns coupled with biochemical characterization showed that these carboxyl methyltransferases are involved either in floral scent biosynthesis or in plant defense responses. While the latter can be induced by biotic or abiotic stress, the genes responsible for floral scent synthesis exhibit developmental and rhythmic expression pattern. The nature of the product and efficiency of its formation in planta depend on the availability of substrates, the catalytic efficiency of the enzyme toward benzoic acid and/or salicylic acid, and the transcriptional, translational, and post-translational regulation at the enzyme level. The biochemical properties of benzenoid carboxyl methyltransferases suggest that the genes involved in plant defenses might represent the ancestor for the presently existing floral genes which during evolution gained different expression profiles and encoded enzymes with the ability to accept structurally similar substrates. PMID:15946712

Effmert, Uta; Saschenbrecker, Sandra; Ross, Jeannine; Negre, Florence; Fraser, Chris M.; Noel, Joseph P.; Dudareva, Natalia; Piechulla, Birgit

2010-01-01

43

Nodularin, a cyanobacterial toxin, is synthesized in planta by symbiotic Nostoc sp.  

PubMed

The nitrogen-fixing bacterium, Nostoc, is a commonly occurring cyanobacterium often found in symbiotic associations. We investigated the potential of cycad cyanobacterial endosymbionts to synthesize microcystin/nodularin. Endosymbiont DNA was screened for the aminotransferase domain of the toxin biosynthesis gene clusters. Five endosymbionts carrying the gene were screened for bioactivity. Extracts of two isolates inhibited protein phosphatase 2A and were further analyzed using electrospray ionization mass spectrometry (ESI-MS)/MS. Nostoc sp. 'Macrozamia riedlei 65.1' and Nostoc sp. 'Macrozamia serpentina 73.1' both contained nodularin. High performance liquid chromatography (HPLC) HESI-MS/MS analysis confirmed the presence of nodularin at 9.552.4?ng ?g-1 chlorophyll a in Nostoc sp. 'Macrozamia riedlei 65.1' and 12.58.4?ng??g-1 Chl a in Nostoc sp. 'Macrozamia serpentina 73.1' extracts. Further scans indicated the presence of the rare isoform [L-Har(2)] nodularin, which contains L-homoarginine instead of L-arginine. Nodularin was also present at 1.340.74?ng?ml(-1) (approximately 3?pmol per g plant ww) in the methanol root extracts of M. riedlei MZ65, while the presence of [L-Har(2)] nodularin in the roots of M. serpentina MZ73 was suggested by HPLC HESI-MS/MS analysis. The ndaA-B and ndaF genomic regions were sequenced to confirm the presence of the hybrid polyketide/non-ribosomal gene cluster. A seven amino-acid insertion into the NdaA-C1 domain of N. spumigena NSOR10 protein was observed in all endosymbiont-derived sequences, suggesting the transfer of the nda cluster from N. spumigena to terrestrial Nostoc species. This study demonstrates the synthesis of nodularin and [L-Har(2)] nodularin in a non-Nodularia species and the production of cyanobacterial hepatotoxin by a symbiont in planta. PMID:22456448

Gehringer, Michelle M; Adler, Lewis; Roberts, Alexandra A; Moffitt, Michelle C; Mihali, Troco K; Mills, Toby J T; Fieker, Claus; Neilan, Brett A

2012-10-01

44

In planta reduction of maize seedling stalk lesions by the bacterial endophyte Bacillus mojavensis.  

PubMed

Maize (Zea mays L.) is susceptible to infection by Fusarium verticillioides through autoinfection and alloinfection, resulting in diseases and contamination of maize kernels with the fumonisin mycotoxins. Attempts at controlling this fungus are currently being done with biocontrol agents such as bacteria, and this includes bacterial endophytes, such as Bacillus mojavensis . In addition to producing fumonisins, which are phytotoxic and mycotoxic, F. verticillioides also produces fusaric acid, which acts both as a phytotoxin and as an antibiotic. The question now is Can B. mojavensis reduce lesion development in maize during the alloinfection process, simulated by internode injection of the fungus? Mutant strains of B. mojavensis that tolerate fusaric acid were used in a growth room study to determine the development of stalk lesions, indicative of maize seedling blight, by co-inoculations with a wild-type strain of F. verticillioides and with non-fusaric acid producing mutants of F. verticillioides. Lesions were measured on 14-day-old maize stalks consisting of treatment groups inoculated with and without mutants and wild-type strains of bacteria and fungi. The results indicate that the fusaric-acid-tolerant B. mojavensis mutant reduced stalk lesions, suggesting an in planta role for this substance as an antibiotic. Further, lesion development occurred in maize infected with F. verticillioides mutants that do not produce fusaric acid, indicating a role for other phytotoxins, such as the fumonisins. Thus, additional pathological components should be examined before strains of B. mojavensis can be identified as being effective as a biocontrol agent, particularly for the control of seedling disease of maize. PMID:21635192

Bacon, Charles W; Hinton, Dorothy M

2011-06-01

45

RNA-guided transcriptional regulation in planta via synthetic dCas9-based transcription factors.  

PubMed

Targeted genomic regulation is a powerful approach to accelerate trait discovery and development in agricultural biotechnology. Bacteria and archaea use clustered regularly interspaced short palindromic repeats (CRISPRs) and CRISPR-associated (Cas) regulatory systems for adaptive molecular immunity against foreign nucleic acids introduced by invading phages and conjugative plasmids. The type II CRISPR/Cas system has been adapted for genome editing in many cell types and organisms. A recent study used the catalytically inactive Cas9 (dCas9) protein combined with guide-RNAs (gRNAs) as a DNA-targeting platform to modulate gene expression in bacterial, yeast, and human cells. Here, we modified this DNA-targeting platform for targeted transcriptional regulation in planta by developing chimeric dCas9-based transcriptional activators and repressors. To generate transcriptional activators, we fused the dCas9 C-terminus with the activation domains of EDLL and TAL effectors. To generate a transcriptional repressor, we fused the dCas9 C-terminus with the SRDX repression domain. Our data demonstrate that dCas9 fusion with the EDLL activation domain (dCas9:EDLL) and the TAL activation domain (dCas9:TAD), guided by gRNAs complementary to selected promoter elements, induce strong transcriptional activation on Bs3::uidA targets in plant cells. Further, the dCas9:SRDX-mediated transcriptional repression of an endogenous gene. Thus, our results suggest that the synthetic transcriptional repressor (dCas9:SRDX) and activators (dCas9:EDLL and dCas9:TAD) can be used as endogenous transcription factors to repress or activate transcription of an endogenous genomic target. Our data indicate that the CRISPR/dCas9 DNA-targeting platform can be used in plants as a functional genomics tool and for biotechnological applications. PMID:25400128

Piatek, Agnieszka; Ali, Zahir; Baazim, Hatoon; Li, Lixin; Abulfaraj, Aala; Al-Shareef, Sahar; Aouida, Mustapha; Mahfouz, Magdy M

2014-11-14

46

A Relao entre Teoria, Postulados, Hipteses e a Natureza da  

E-print Network

A Relação entre Teoria, Postulados, Hipóteses e a Natureza da Investigação Científica #12;Conhecimento (Teorias) Explicação Científica Hipótese Científica Modelo Estatístico Hipótese Estatística Dados

Paiva, Paulo Cesar de

47

Qui a dmnag entre 1973 et 1978, et pourquoi ?  

Microsoft Academic Search

[fre] 85% des mnages existant en mars 1978 taient dj constitus au 1er janvier 1973. L'article tudie la mobilit rsidentielle de ces mnages permanents . Presqu'un sur trois a dmnag au moins une fois, et un sur vingt a chang de rgion entre ces deux dates. Ce sont surtout les jeunes qui changent de domicile mais on migre aussi

Claude Taffin; Franois Fabre

1981-01-01

48

Norbert Elias entre sociologie et histoire Daniel Azulos  

E-print Network

Norbert Elias entre sociologie et histoire Daniel Azuélos Professeur des Universités (littérature Cedex 1, azuelos.daniel [at] orange.fr Norbert Elias, dans ses travaux les plus sociologiques ou d'excéder le réel. In his most sociological works Norbert Elias always privileged the historical

Paris-Sud XI, Université de

49

Publication interne IRISA numro 1912 Proportion analogique entre arbres  

E-print Network

Publication interne IRISA numéro 1912 Proportion analogique entre arbres : une étude étiquetés. Pour ce type de structure, nous proposons notre propre définition de la proportion analogique et.irisa.fr inria-00340623,version1-21Nov2008 #12;Analogical proportion between trees: a bibliographic study

Paris-Sud XI, Université de

50

Significant reduction of BiFC non-specific assembly facilitates in planta assessment of heterotrimeric G-protein interactors  

PubMed Central

Protein networks and signaling cascades are key mechanisms for intra- and intercellular signal transduction. Identifying the interacting partners of a protein can provide vital clues regarding its physiological role. The bimolecular fluorescence complementation (BiFC) assay has become a routine tool for in vivo analysis of proteinprotein interactions and their subcellular location. Although the BiFC system has improved since its inception, the available options for in planta analysis are still subject to very low signal-to-noise ratios, and a systematic comparison of BiFC confounding background signals has been lacking. Background signals can obscure weak interactions, provide false positives, and decrease confidence in true positives. To overcome these problems, we performed an extensive in planta analysis of published BiFC fragments used in metazoa and plants, and then developed an optimized single vector BiFC system which utilizes monomeric Venus (mVenus) split at residue 210, and contains an integrated mTurquoise2 marker to precisely identify transformed cells in order to distinguish true negatives. Here we provide our streamlined double ORF expression (pDOE) BiFC system, and show that our advance in BiFC methodology functions even with an internally fused mVenus210 fragment. We illustrate the efficacy of the system by providing direct visualization of Arabidopsis MLO1 interacting with a calmodulin-like (CML) protein, and by showing that heterotrimeric G-protein subunits G? (GPA1) and G? (AGB1) interact in plant cells. We further demonstrate that GPA1 and AGB1 each physically interact with PLD?1 in planta, and that mutation of the so-called PLD?1 DRY motif abolishes both of these interactions. PMID:25187041

Gookin, Timothy E; Assmann, Sarah M

2014-01-01

51

In planta gene expression analysis of Xanthomonas oryzae pathovar oryzae, African strain MAI1  

PubMed Central

Background Bacterial leaf blight causes significant yield losses in rice crops throughout Asia and Africa. Although both the Asian and African strains of the pathogen, Xanthomonas oryzae pv. oryzae (Xoo), induce similar symptoms, they are nevertheless genetically different, with the African strains being more closely related to the Asian X. oryzae pv. oryzicola (Xoc). Results Changes in gene expression of the African Xoo strain MAI1 in the susceptible rice cultivar Nipponbare were profiled, using an SSH Xoo DNA microarray. Microarray hybridization was performed comparing bacteria recovered from plant tissues at 1, 3, and 6 days after inoculation (dai) with bacteria grown in vitro. A total of 710 bacterial genes were found to be differentially expressed, with 407 up-regulated and 303 down-regulated. Expression profiling indicated that less than 20% of the 710 bacterial transcripts were induced in the first 24 h after inoculation, whereas 63% were differentially expressed at 6 dai. The 710 differentially expressed genes were one-end sequenced. 535 sequences were obtained from which 147 non-redundant sequences were identified. Differentially expressed genes were related to metabolism, secretion and transport, pathogen adherence to plant tissues, plant cell-wall degradation, IS elements, and virulence. In addition, various other genes encoding proteins with unknown function or showing no similarity to other proteins were also induced. The Xoo MAI1 non-redundant set of sequences was compared against several X. oryzae genomes, revealing a specific group of genes that was present only in MAI1. Numerous IS elements were also found to be differentially expressed. Quantitative real-time PCR confirmed 86% of the identified profile on a set of 14 genes selected according to the microarray analysis. Conclusions This is the first report to compare the expression of Xoo genes in planta across different time points during infection. This work shows that as-yet-unidentified and potentially new virulence factors are appearing in an emerging African pathogen. It also confirms that African Xoo strains do differ from their Asian counterparts, even at the transcriptional level. PMID:20540733

2010-01-01

52

Utilizao da radiao gama do Cobalto-60 como tratamento quarentenrio de plantas medicinais, aromticas e condimentares desidratadas infestadas por lasioderma serricorne (fabricius, 1792) (coleoptera, anobiidae) e plodia interpunctella (hubner, 1813) (lepidoptera, pyralidae).  

E-print Network

??A pesquisa teve como objetivo a utilizao da radiao gama do Cobalto-60 como tratamento quarentenrio de plantas medicinais, aromticas e condimentares desidratadas infestadas por Lasioderma (more)

Juliana Nazar Alves

2007-01-01

53

FUSION ENTRE VSICULES P H 0SPHOLIPIDIQUES C. TAUPIN (*)  

E-print Network

FUSION ENTRE V?SICULES P H 0SPHOLIPIDIQUES C. TAUPIN (*) Stauffer Laboratory for Physical Chemistry comportent des études a) de l'augmentation du volume interne due à la fusion, b) de la décroissance du différentes. Divers agents induisant la fusion ont été étudiés. Abstract. - A variety of experiments show

Paris-Sud XI, Université de

54

TUDE DES INTERRELATIONS ENTRE LES CRITRES DE PRODUCTION  

E-print Network

production laitière, le taux butyreux, la teneur en matières azotées, les pourcentages des acides gras dans les matières grasses, les quantités secrétées de matières grasses, de matières azotées et d'acides variation suivants : production, longueur de la chaîne carbonée des acides gras, opposition entre les

Boyer, Edmond

55

Armando Discpolo: Entre el grotesco italiano y el grotesco criollo  

E-print Network

FAIMQSK 55 Armando Discpolo: Entre el grotesco italiano y el grotesco criollo Osvaldo Pellettieri Una serie de trabajos crticos ha mostrado la presencia del grottesco y del teatro de Pirandello en la escena nacional, especial mente a partir... italiana, cre conscientemente un modelo distinto. 2. Este modelo slo mantiene con el italiano una relacin semntica. 3. El modelo de Stefanoy como grotesco criollo en su pero do cannico puede resultar un aporte para la total descrip cin del...

Pellettieri, Osvaldo

1988-10-01

56

Synchronisation de donnes entre services de stockage dans le Cloud  

E-print Network

Synchronisation de données entre services de stockage dans le Cloud On trouve aujourd'hui de plus en plus de service de stockage de données dans le Cloud qui permette de conserver des données et de://www.programmableweb.com/apis/directory/1?apicat=Storage L'objectif de ce projet est de choisir trois services de stockage et de construire

Contassot-Vivier, Sylvain

57

un lien entre la voie endolysosomale et la mort cellulaire  

E-print Network

Alix un lien entre la voie endolysosomale et la mort cellulaire Co-directeurs de thèse : Dr Chapitre 1. La mort cellulaire programmée : les différents acteurs et mécanismes moléculaires I. Caractérisation morphologiques des différents processus de mort cellulaire 1 II. De C.elegans aux mammifères 3 III

Paris-Sud XI, Université de

58

Identification and characterization of in planta-expressed secreted effector proteins from Magnaporthe oryzae that induce cell death in rice.  

PubMed

Interactions between rice and Magnaporthe oryzae involve the recognition of cellular components and the exchange of complex molecular signals from both partners. How these interactions occur in rice cells is still elusive. We employed robust-long serial analysis of gene expression, massively parallel signature sequencing, and sequencing by synthesis to examine transcriptome profiles of infected rice leaves. A total of 6,413 in planta-expressed fungal genes, including 851 genes encoding predicted effector proteins, were identified. We used a protoplast transient expression system to assess 42 of the predicted effector proteins for the ability to induce plant cell death. Ectopic expression assays identified five novel effectors that induced host cell death only when they contained the signal peptide for secretion to the extracellular space. Four of them induced cell death in Nicotiana benthamiana. Although the five effectors are highly diverse in their sequences, the physiological basis of cell death induced by each was similar. This study demonstrates that our integrative genomic approach is effective for the identification of in planta-expressed cell death-inducing effectors from M. oryzae that may play an important role facilitating colonization and fungal growth during infection. PMID:23035914

Chen, Songbiao; Songkumarn, Pattavipha; Venu, R C; Gowda, Malali; Bellizzi, Maria; Hu, Jinnan; Liu, Wende; Ebbole, Daniel; Meyers, Blake; Mitchell, Thomas; Wang, Guo-Liang

2013-02-01

59

The application of laser microdissection to in planta gene expression profiling of the maize anthracnose stalk rot fungus Colletotrichum graminicola.  

PubMed

Laser microdissection (LM) offers a potential means for deep sampling of a fungal plant-pathogen transcriptome during the infection process using whole-genome DNA microarrays. The use of a fluorescent protein-expressing fungus can greatly facilitate the identification of fungal structures for LM sampling. However, fixation methods that preserve both tissue histology and protein fluorescence, and that also yield RNA of suitable quality for microarray applications, have not been reported. We developed a microwave-accelerated acetone fixation, paraffin-embedding method that fulfills these requirements and used it to prepare mature maize stalk tissues infected with an Anemonia majano cyan fluorescent protein-expressing isolate of the anthracnose stalk rot fungus Colletotrichum graminicola. We successfully used LM to isolate individual maize cells associated with C. graminicola hyphae at an early stage of infection. The LM-derived RNA, after two-round linear amplification, was of sufficient quality and quantity for global expression profiling using a fungal microarray. Comparing replicated LM samples representing an early stage of stalk cell infection with samples from in vitro-germinated conidia, we identified 437 and 370 C. graminicola genes showing significant up- or downregulation, respectively. We confirmed the differential expression of several representative transcripts by quantitative reverse-transcriptase polymerase chain reaction (RT-PCR) and documented extensive overlap of this dataset with a PCR-subtraction library enriched for C. graminicola transcripts in planta. Our results demonstrate that LM is feasible for in planta pathogen expression profiling and can reveal clues about fungal genes involved in pathogenesis. The method in this report may be advantageous for visualizing a variety of cellular features that depend on a high degree of histochemical preservation and RNA integrity prior to LM. PMID:17073306

Tang, Weihua; Coughlan, Sean; Crane, Edmund; Beatty, Mary; Duvick, Jon

2006-11-01

60

Development of fiber optic spectroscopy for in-vitro and in-planta detection of fluorescent proteins  

NASA Astrophysics Data System (ADS)

The objective of this project is to apply photonics technology to bio-safety management of genetically modified (GM) plants. The conventional method for screening GM plants is through selection using antibiotic resistance markers. There is public concern with such approaches and these are associated with food safety issues, escape of antibiotic resistance genes to pathogenic microorganisms and interference with antibiotic therapy. Thus, the strategy taken in this project is to replace antibiotic resistance markers with fluorescent protein markers that allow for rapid and non-invasive optical screening of genetically modified plants. In this paper, fibre optic spectroscopy was developed to detect and quantify recombinant green (EGFP) and red (DsRED) fluorescent proteins in vitro and in planta. In vitro detection was first carried out to optimize the sensitivity of the optical system. The bacterial expression vectors carrying the coding regions of EGFP and DsRED were introduced into Escherichia coli host cells and fluorescent proteins were produced following induction with IPTG. Soluble EGFP and DsRED proteins were isolated from lysed bacterial cells and serially diluted for quantitative analysis by fibre optic spectroscopy using different light sources, namely, blue LED (475 nm), tungsten halogen (350 - 1000 nm) and double frequency Nd:YAG green laser (532 nm). Fluorescence near the expected emission wavelengths could be detected up to 320X dilution for EGFP and DsRED with blue LED and 532 nm green laser, respectively, as the excitation source. Tungsten halogen was found to be unsuitable for excitation of both EGFP and DsRED. EGFP was successfully purified by size separation under non-denaturing electrophoretic conditions and quantified. The minimum concentration of EGFP detectable with blue LED excitation was 5 mg/ml. To determine the capability of spectroscopy detection in planta, transgenic potato hairy roots and whole modified plant lines expressing the fluorescent markers were regenerated. T

Liew, Oi Wah; Chen, Jun-Wei; Asundi, Anand K.

2001-10-01

61

O nome do fogo : relaes entre a Ekpyrosis, astrologia e milenarismo no mundo helenstico romano.  

E-print Network

??Dissertao (mestrado)Universidade de Braslia, Departamento de Histria, 2009. Esta dissertao trata da relao entre o tema da ekpyrosis ou conflagrao final com a astrologia helenstica. (more)

Silva, Rodrigo Carvalho

2009-01-01

62

In planta mechanism of action of leptospermone: impact of its physico-chemical properties on uptake, translocation, and metabolism.  

PubMed

Leptospermone is a natural ?-triketone that specifically inhibits the enzyme p-hydrophyphenylpyruvate dioxygenase, the same molecular target site as that of the commercial herbicide mesotrione. The ?-triketone-rich essential oil of Leptospermum scoparium has both preemergence and postemergence herbicidal activity, resulting in bleaching of treated plants and dramatic growth reduction. Radiolabeled leptospermone was synthesized to investigate the in planta mechanism of action of this natural herbicide. Approximately 50% of the absorbed leptospermone was translocated to the foliage suggesting rapid acropetal movement of the molecule. On the other hand, very little leptospermone was translocated away from the point of application on the foliage, indicating poor phloem mobility. These observations are consistent with the physico-chemical properties of leptospermone, such as its experimentally measured logP and pK a values, and molecular mass, number of hydrogen donors and acceptors, and number of rotatable bonds. Consequently, leptospermone is taken up readily by roots and translocated to reach its molecular target site. This provides additional evidence that the anecdotal observation of allelopathic suppression of plant growth under ?-triketone-producing species may be due to the release of these phytotoxins in soils. PMID:23314892

Owens, Daniel K; Nanayakkara, N P Dhammika; Dayan, Franck E

2013-02-01

63

Cloning and characterization of pl1 encoding an in planta-secreted pectate lyase of Fusarium oxysporum.  

PubMed

A pectate lyase (PL1) from the tomato vascular wilt pathogen Fusarium oxysporum f.sp. lycopersici was previously characterized, and evidence was obtained for its production in planta. The gene encoding PL1 was isolated from a genomic library of F. oxysporum f. sp. lycopersici. Pl1 encodes a 240 amino-acid polypeptide with one putative N-glycosylation site and a 15 amino-acid N-terminal signal peptide. PL1 showed 89%, 67%, 55% and 56% identity with the products of the Fusarium solani f.sp. pisi pelA, pelB, pelC and pelD genes, respectively. A single copy of the gene was detected in different formae speciales of F. oxysporum. The pl1 transcript was observed during growth on polygalacturonic acid sodium salt and tomato vascular tissue, but not on pectin or glucose. RT-PCR showed pl1 expression in roots and stems of tomato plants infected by F. oxysporum f.sp. lycopersici. PMID:10022947

Huertas-Gonzlez, M D; Ruiz-Roldn, M C; Garca Maceira, F I; Roncero, M I; Di Pietro, A

1999-02-01

64

An optimized mRFP-based bimolecular fluorescence complementation system for the detection of protein-protein interactions in planta.  

PubMed

An existing bimolecular fluorescence complementation (BiFC) system, based on a monomeric red fluorescent protein (mRFP), has been optimized for the investigation of protein-protein interactions in planta. The expression plasmids, encoding the N-terminal amino acids (aa) 1-168 and the C-terminal aa 169-225 of the mRFP, allow N- or C-terminal fusion of a split mRFP, with the genes of interest. Two major improvements over the original vectors have been made. Firstly, the coding sequence of a GGGSGGG-linker has been integrated between mRFP sequences and the genes of interest. Secondly, a modified mini binary vector (?3.5 kb) was introduced as the backbone for the plant expression plasmids. Based on the results of yeast two-hybrid studies with plant viral proteins, interaction of viral proteins was tested in Nicotiana benthamiana plants and monitored by confocal laser scanning microscopy (CLSM). Plum pox virus coat protein and mutants thereof served as controls. The system was validated using the N-protein of Capsicum chlorosis virus for which a self-interaction was shown for the first time, the Tobacco mosaic virus coat protein and BC1 and BV1 of the Tomato yellow leaf curl Thailand virus. This optimized BiFC system provides a convenient alternative to other BiFC, as well as yeast two-hybrid assays, for detecting protein-protein interactions. PMID:21473882

Zilian, Eva; Maiss, Edgar

2011-06-01

65

Agrobacterium tumefaciens Deploys a Superfamily of Type VI Secretion DNase Effectors as Weapons for Interbacterial Competition In Planta  

PubMed Central

Summary The type VI secretion system (T6SS) is a widespread molecular weapon deployed by many Proteobacteria to target effectors/toxins into both eukaryotic and prokaryotic cells. We report that Agrobacterium tumefaciens, a soil bacterium that triggers tumorigenesis in plants, produces a family of type VI DNase effectors (Tde) that are distinct from previously known polymorphic toxins and nucleases. Tde exhibits an antibacterial DNase activity that relies on a conserved HxxD motif and can be counteracted by a cognate immunity protein, Tdi. Invitro, A. tumefaciens T6SS could kill Escherichia coli but triggered a lethal counterattack by Pseudomonas aeruginosa upon injection of the Tde toxins. However, in an in planta coinfection assay, A. tumefaciens used Tde effectors to attack both siblings cells and P. aeruginosa to ultimately gain a competitive advantage. Such acquired T6SS-dependent fitness invivo and conservation of Tde-Tdi couples in bacteria highlights a widespread antibacterial weapon beneficial for niche colonization. PMID:24981331

Ma, Lay-Sun; Hachani, Abderrahman; Lin, Jer-Sheng; Filloux, Alain; Lai, Erh-Min

2014-01-01

66

Functional characterisation of metal(loid) processes in planta through the integration of synchrotron techniques and plant molecular biology  

PubMed Central

Functional characterisation of the genes regulating metal(loid) homeostasis in plants is a major focus of crop biofortification, phytoremediation, and food security research. This paper focuses on the potential for advancing plant metal(loid) research by combining molecular biology and synchrotron-based techniques. Recent advances in x-ray focussing optics and fluorescence detection have greatly improved the potential of synchrotron techniques for plant science research, allowing metal(loids) to be imaged in vivo in hydrated plant tissues at sub-micron resolution. Laterally resolved metal(loid) speciation can also be determined. By using molecular techniques to probe the location of gene expression and protein localisation and combining it with this synchrotron-derived data, functional information can be effectively and efficiently assigned to specific genes. This paper provides a review of the state of the art in this field, and provides examples as to how synchrotron-based methods can be combined with molecular techniques to facilitate functional characterisation of genes in planta. PMID:22200921

Donner, Erica; Punshon, Tracy; Guerinot, Mary Lou; Lombi, Enzo

2013-01-01

67

Detection of plum pox potyviral protein-protein interactions in planta using an optimized mRFP-based bimolecular fluorescence complementation system.  

PubMed

In previous studies, protein interaction maps of different potyviruses have been generated using yeast two-hybrid (YTH) systems, and these maps have demonstrated a high diversity of interactions of potyviral proteins. Using an optimized bimolecular fluorescence complementation (BiFC) system, a complete interaction matrix for proteins of a potyvirus was developed for the first time under in planta conditions with ten proteins from plum pox virus (PPV). In total, 52 of 100 possible interactions were detected, including the self-interactions of CI, 6K2, VPg, NIa-Pro, NIb and CP, which is more interactions than have ever been detected for any other potyvirus in a YTH approach. Moreover, the BiFC system was shown to be able to localize the protein interactions, which was typified for the protein self-interactions indicated above. Additionally, experiments were carried out with the P3N-PIPO protein, revealing an interaction with CI but not with CP and supporting the involvement of P3N-PIPO in the cell-to-cell movement of potyviruses. No self-interaction of the PPV helper component-proteinase (HC-Pro) was detected using BiFC in planta. Therefore, additional experiments with turnip mosaic virus (TuMV) HC-Pro, PPV_HC-Pro and their mutants were conducted. The self-interaction of TuMV_HCpro, as recently demonstrated, and the self-interaction of the TuMV_ and PPV_HC-Pro mutants were shown by BiFC in planta, indicating that HC-Pro self-interactions may be species-specific. BiFC is a very useful and reliable method for the detection and localization of protein interactions in planta, thus enabling investigations under more natural conditions than studies in yeast cells. PMID:21880839

Zilian, Eva; Maiss, Edgar

2011-12-01

68

In Planta Regulation of Extension of an Endophytic Fungus and Maintenance of High Metabolic Rates in Its Mycelium in the Absence of Apical Extension  

PubMed Central

The fungus Neotyphodium lolii is an endophytic symbiont. It grows in the intercellular spaces of the perennial ryegrass Lolium perenne, producing secondary metabolites which enhance the fitness of the association over that of uninfected L. perenne. We report that the average number of hyphal strands in a given section of a leaf remains constant during the life of a leaf, indicating synchrony of leaf and hyphal extension, including cessation of hyphal extension when leaf extension ceases. We used a constitutively expressed reporter gene as an indicator of the mycelium's metabolic activity during and after hyphal extension. Reporter gene activity decreased when the mycelium stopped extending in liquid culture but not in planta. This indicates that in planta endophyte hyphae remain metabolically highly active when extension has ceased and throughout the life of the leaf they are colonizing. The behavior of the fungus in planta indicates the existence of signaling pathways which (i) synchronize the extension of leaf and hypha by regulating hyphal extension, (ii) suppress hyphal branching, and (iii) stop apical extension of fungal hyphae, without reducing the mycelium's metabolic activity. These signals may be crucial for the symbiosis, by allowing the endophyte to switch the focus of its metabolic activity from extension to the production of secondary metabolites. PMID:11722882

Tan, Yong Y.; Spiering, Martin J.; Scott, Vicki; Lane, Geoffrey A.; Christensen, Michael J.; Schmid, Jan

2001-01-01

69

L'analyse des relations dynamiques entre variables : une application au taux du march montaire franais  

Microsoft Academic Search

[fre] La dtection des relations dynamiques existant entre des variables pose un problme important en conomie. Des procdures statistiques, fondes sur l'tude des rsidus issus de filtres ARIMA de Box et Jenkins, ont t rcemment dveloppes. Ce texte prsente ces mthodes statistiques : dtermination des filtres ARIMA, tude des corrlogrammes entre rsidus, estimation de fonctions de transfert. Celles-ci sont ensuite

Gilbert Colletaz; William Marois

1981-01-01

70

Medication Adherence in Type 2 Diabetes: The ENTRED Study 2007, a French Population-Based Study  

E-print Network

Medication Adherence in Type 2 Diabetes: The ENTRED Study 2007, a French Population-Based Study linked with poor adherence in patients with type 2 diabetes in France. Methodology: The ENTRED study 2007, a French national survey of people treated for diabetes, was based on a representative sample of patients

Boyer, Edmond

71

La transposition du concept de trahison interpersonnelle aux relations entre marques et clients  

E-print Network

1 La transposition du concept de trahison interpersonnelle aux relations entre marques et clients Cette communication constitue le premier résultat d'un programme de recherche sur la trahison relations entre marques et clients : réflexions conceptuelles et étude exploratoire Résumé Cette recherche

Paris-Sud XI, Université de

72

Bikinin-like inhibitors targeting GSK3/Shaggy-like kinases: characterisation of novel compounds and elucidation of their catabolism in planta  

PubMed Central

Background Plant GSK-3/Shaggy-like kinases are key players in brassinosteroid (BR) signalling which impact on plant development and participate in response to wounding, pathogens and salt stress. Bikinin was previously identified in a chemical genetics screen as an inhibitor targeting these kinases. To dissect the structural elements crucial for inhibition of GSK-3/Shaggy-like kinases by bikinin and to isolate more potent compounds we synthesised a number of related substances and tested their inhibitory activity in vitro and in vivo using Arabidopsis thaliana. Results A pyridine ring with an amido succinic acid residue in position 2 and a halogen in position 5 were crucial for inhibitory activity. The compound with an iodine substituent in position 5, denoted iodobikinin, was most active in inhibiting BIN2 activity in vitro and efficiently induced brassinosteroid-like responses in vivo. Its methyl ester, methyliodobikinin, showed improved cell permeability, making it highly potent in vivo although it had lower activity in vitro. HPLC analysis revealed that the methyl residue was rapidly cleaved off in planta liberating active iodobikinin. In addition, we provide evidence that iodobikinin and bikinin are inactivated in planta by conjugation with glutamic acid or malic acid and that the latter process is catalysed by the malate transferase SNG1. Conclusion Brassinosteroids participate in regulation of many aspects of plant development and in responses to environmental cues. Thus compounds modulating their action are valuable tools to study such processes and may be an interesting opportunity to modify plant growth and performance in horticulture and agronomy. Here we report the development of bikinin derivatives with increased potency that can activate BR signalling and mimic BR action. Methyliodobikinin was 3.4 times more active in vivo than bikinin. The main reason for the superior activity of methyliodobikinin, the most potent compound, is its enhanced plant tissue permeability. Inactivation of bikinin and its derivatives in planta involves SNG1, which constitutes a novel pathway for modification of xenobiotic compounds. PMID:24947596

2014-01-01

73

Relaes quantitativas entre a estrutura qumica e a atividade antimicrobiana de anlogos nifuroxazida.  

E-print Network

??Com o objetivo de estudar as relaes quantitativas entre a estrutura qumica e a atividade antimicrobiana de anlogos nifuroxazida (5-nitro2-furfurilideno 4-hidroxi benzidrazida), prepararam-se quatorze (more)

Leoberto Costa Tavares

1993-01-01

74

Darwin et la socialit : entre anthropomorphisme et gradualisme. Between anthropomorphism and gradualism: Darwin and sociality.  

E-print Network

Darwin et la socialité : entre anthropomorphisme et gradualisme. Between anthropomorphism adequate representation to mammals, is not an expression of a naive anthropomorphism, but of a methodological anthropomorphism; normal consequence of his gradualist approach of phylogeny. Keywords: Social

Paris-Sud XI, Université de

75

COMPETIO ENTRE ABELHAS DURANTE FORRAGEAMENTO EM Schefflera arboricola (HAYATA) MERR COMPETITION AMONG BEES DURING FORAGING ON Schefflera arboricola (HAYATA) MERR  

Microsoft Academic Search

RESUMO: Schefflera arboricola (Hayata) Merr (Araliaceae) uma planta extica, porm amplamente cultivada no Brasil para ornamentao. Devido abundncia de flores que produz, esta rvore altamente atrativa para abelhas Apis mellifera, bem como para diversos meliponneos nativos. S. arboricola oferece aos seus visitantes florais plen e nctar, que so disponibilizados ao amanhecer. A. mellifera possui ampla vantagem na

Cristiano MENEZES; Cludia Ins da SILVA; Rodrigo Bustos SINGER; Warwick Estevam

76

LARGISSEMENT STARK DE RAIES HYDROGNODES ENTRE NIVEAUX LEVS D'IONS MULTICHARGS  

E-print Network

, composé d'états ce (resp. ~), est soumis au hamiltonien d'effet Stark H (F) (resp. Hb(F)). L121 ?LARGISSEMENT STARK DE RAIES HYDROG?NOÏDES ENTRE NIVEAUX ?LEV?S D'IONS MULTICHARG?S A l'élargissement Stark des raies hydrogénoïdes d'ions multi- chargés, entre niveaux d'énergie élevés

Paris-Sud XI, Université de

77

La relation entre flux d'entres nets et performance des fonds : une tude applique au cas des OPCVM actions franais  

E-print Network

performance relative moyenne ou faible, il n'y a pas d'effet des performances passées. Nous montrons aussi que pour autant être pénalisante en configuration défavorable (Brown, Harley et Starks (1996) et Chevallier'entrées dans les fonds au regard de cette littérature dans le cas français. En effet, à l'exception du travail

Boyer, Edmond

78

L'art contemporain entre Le temps et L'histoire  

E-print Network

L'art contemporain entre Le temps et L'histoire Cycle de conférences et de conversations Musée d'art contemporain de Montréal 16 janvier ­ 23 mai 2013 entrée gratuite Musée d'art contemporain de Montréal 185, rue Sainte-Catherine Ouest Métro Place-des-Arts www.macm.org Depuis la fin des années 1980, l'art

Kambhampati, Patanjali

79

Diferncies en les amplituds articulars entre homes i dones en edat escolar  

Microsoft Academic Search

Introducci: En aquest estudi shan analitzat les diferncies existents entre homes i dones respecte de lamplitud articular en el transcurs de la vida escolar.\\u000aMtodes: Sanalitza una poblaci de 420 alumnes, nois i\\u000anoies, amb edats compreses entre els 7 i 17 anys (educaci primria i educaci secundria obligatria).\\u000aLestudi sha fet mitjanant laplicaci duna bateria de tests de valoraci

David Ramos Espada; Jos Luis Gonzlez Montesinos; Jess Mora Vicente

2007-01-01

80

The Small Subunit of Snapdragon Geranyl Diphosphate Synthase Modifies the Chain Length Specificity of Tobacco Geranylgeranyl Diphosphate Synthase in Planta[W  

PubMed Central

Geranyl diphosphate (GPP), the precursor of many monoterpene end products, is synthesized in plastids by a condensation of dimethylallyl diphosphate and isopentenyl diphosphate (IPP) in a reaction catalyzed by homodimeric or heterodimeric GPP synthase (GPPS). In the heterodimeric enzymes, a noncatalytic small subunit (GPPS.SSU) determines the product specificity of the catalytic large subunit, which may be either an active geranylgeranyl diphosphate synthase (GGPPS) or an inactive GGPPS-like protein. Here, we show that expression of snapdragon (Antirrhinum majus) GPPS.SSU in tobacco (Nicotiana tabacum) plants increased the total GPPS activity and monoterpene emission from leaves and flowers, indicating that the introduced catalytically inactive GPPS.SSU found endogenous large subunit partner(s) and formed an active snapdragon/tobacco GPPS in planta. Bimolecular fluorescence complementation and in vitro enzyme analysis of individual and hybrid proteins revealed that two of four GGPPS-like candidates from tobacco EST databases encode bona fide GGPPS that can interact with snapdragon GPPS.SSU and form a functional GPPS enzyme in plastids. The formation of chimeric GPPS in transgenic plants also resulted in leaf chlorosis, increased light sensitivity, and dwarfism due to decreased levels of chlorophylls, carotenoids, and gibberellins. In addition, these transgenic plants had reduced levels of sesquiterpene emission, suggesting that the export of isoprenoid intermediates from the plastids into the cytosol was decreased. These results provide genetic evidence that GPPS.SSU modifies the chain length specificity of phylogenetically distant GGPPS and can modulate IPP flux distribution between GPP and GGPP synthesis in planta. PMID:20028839

Orlova, Irina; Nagegowda, Dinesh A.; Kish, Christine M.; Gutensohn, Michael; Maeda, Hiroshi; Varbanova, Marina; Fridman, Eyal; Yamaguchi, Shinjiro; Hanada, Atsushi; Kamiya, Yuji; Krichevsky, Alexander; Citovsky, Vitaly; Pichersky, Eran; Dudareva, Natalia

2009-01-01

81

ANALYSE DE SENSIBILITE : COMPARAISON ENTRE LES PLANS D'EXPERIENCES ET LA METHODE MONTE CARLO  

E-print Network

ANALYSE DE SENSIBILITE : COMPARAISON ENTRE LES PLANS D'EXPERIENCES ET LA METHODE MONTE CARLO uncertain input and the output: Monte Carlo based method and experimental design in the field présentées et les résultats obtenus sont comparés à ceux issus de la méthode Monte Carlo. Abstract We compare

Paris-Sud XI, Université de

82

DITER ET PUBLIER EN LIGNE : LA PROXIMIT ENTRE AMATEURS ET AUTEURS  

E-print Network

?DITER ET PUBLIER EN LIGNE : LA PROXIMIT? ENTRE AMATEURS ET AUTEURS Broudoux Evelyne (IUT de Vélizy - UVSQ, CHCSC) Mots clefs : amateur, auteur, modèles éditoriaux, édition, publication Introduction Sur le web, les pratiques d'amateurs sont rendues plus visibles par les systèmes de publication et de

Boyer, Edmond

83

Variabilit des phnomnes d'interfrences entre Vicia sativa L. et Avena sativa L.  

E-print Network

Agronomie Variabilité des phénomènes d'interférences entre Vicia sativa L. et Avena sativa L. : II of the phenomena of interferences between Vicia sativa L. and Avena sativa L.: II. Nitro- gen nutrition

Paris-Sud XI, Université de

84

FIRME INTENSIVE EN CAPITAL HUMAIN ET COORDINATION : VERS UNE REDFINITION DU RAPPORT ENTRE INTGRATION ET  

E-print Network

on human capital-intensive firms. We explain that coordination by this kind of firms is much more1 FIRME INTENSIVE EN CAPITAL HUMAIN ET COORDINATION : VERS UNE RED?FINITION DU RAPPORT ENTRE 23, L 22, L 23 Mots clés: Intégration, dé-intégration, coordination, capital humain, théorie de la

Boyer, Edmond

85

ENTR 321-001: New Venture Planning CRN 11765, Fall Semester 2013  

E-print Network

ENTR 321-001: New Venture Planning CRN 11765, Fall Semester 2013 Dr. Kelly G. Shaver Class Hours; shaverk@cofc.edu Catalog Description Student teams write complete business plans for new ventures Entrepreneurial ventures require funding. A start-up company may be able to obtain its "seed" funding informally

Young, Paul Thomas

86

propos des relations entre langue et identit en Bretagne Ronan Le Coadic  

E-print Network

: Brittany, identity, minority language. Introduction Le lien entre langue et identité est étroit dans les de Bretagne Université Rennes 2, CRBC, EA 4451, F-35000 Rennes, France R?SUM? La société bretonne de, businessmen and journalists. The Breton language, which is one of the essential symbols of this identity

Paris-Sud XI, Université de

87

Sur le comportement magntique de l'acide desoxyribonuclique (ADN) entre 80 et 300K  

Microsoft Academic Search

Deux chantillons d'acide desoxyribonuclique (ADN) sont tudis, prpars partir du thymus de veau, l'un simple, l'autre hautement polymris et trs pur. Le comportement magntique du systme est reprsent entre 80 et 300K par la relation\\u000a

N. Perakis; F. Kern

1964-01-01

88

Inter-relations entre aiguilles de calcite et hyphes Gabriel CALLOT, Andr GUYON Daniel MOUSAIN  

E-print Network

Inter-relations entre aiguilles de calcite et hyphes mycéliens Gabriel CALLOT, André GUYON Daniel'intérieur des hyphes de Basidiomycètes. Ces concentrations minérales s'identifient aux aiguilles de calcite, mycorhizes. SUMMARY Relation between calcite needles and fungal hyphae in the soil. Study of soil

Paris-Sud XI, Université de

89

Les mandres du dveloppement agricole au Lac Alaotra, Madagascar Entre inconstance politique et innovation technique  

E-print Network

1 Les méandres du développement agricole au Lac Alaotra, Madagascar Entre inconstance politique et, principal grenier à riz de Madagascar, région à forte immigration et zone de prédilection de l'aide publique, innovation, Lac Alaotra, Madagascar Summary The animated history of the evolution of agriculture of the Lake

Paris-Sud XI, Université de

90

Antimicrobial and Antiviral Activities of Extracts from Several Plant Species Present in Entre Ros  

Microsoft Academic Search

The ethnobotanical background of many plants used as antiseptic present in the Province of Entre Rios (Argentina) facilitated the selection of someones pertain- ing to the vascular genres Myrcianthes pungens, Myrsine laetevirens, Tessaria integrifolia, Acanthospermum australe, Arctium minus y Polygonum punctatum. The plant extracts were tested in their antimicrobial activity through the diffusion tests against six bacterial and two fungal

Juan de Dios Muoz

91

Ecole Doctorale : Sciences et Vie, Sant, Agronomie, Environnement un simulateur pour tudier les compromis entre perf  

E-print Network

Ecole Doctorale : Sciences et Vie, Santé, Agronomie, Environnement un simulateur pour étudier les, Agronomie, Environnement N° d'ordre 586 THESE Pour l'obtention du grade de Docteur d'université Spécialité : Agronomie Dynamilk : un simulateur pour étudier les compromis entre performances animales, utilisation des

Paris-Sud XI, Université de

92

Le Ymen : entre intgration politique et spirale de la (contre-)violence1  

E-print Network

Le Yémen : entre intégration politique et spirale de la (contre-)violence1 - François BURGAT (CNRS avant l'avènement de l'islam au 7ème siècle de notre ère. Le texte coranique et la Tradition prophétique

Boyer, Edmond

93

PROPOSTA CURSO DE VERN: A DIVULGACIN COMO PONTE ENTRE CIENCIA E SOCIEDADE  

E-print Network

PROPOSTA CURSO DE VERÁN: A DIVULGACI?N COMO PONTE ENTRE CIENCIA E SOCIEDADE 2 e 3 de xullo de 2014 BEATRIZ HERVELLA NOGUEIRA. Licenciada en Ciencias Físicas pola USC e cofundadora de 4gotas atmosfera y CONFERENCIA - ESPECTÁCULO RICARDO PAREDES PAMPÍN. Licenciado en Ciencias Físicas pola USC e profesor de

Fraguela, Basilio B.

94

L'volution des rythmes de travail entre 1995 et 2001 : quel impact des 35 heures ?  

Microsoft Academic Search

[fre] Lvolution des rythmes de travail entre 1995 et 2001: quel impact des 35 heures? . . Le passage aux 35 heures ne sest pas limit la baisse de la dure lgale du travail. La ngociation au sein des branches ou des entreprises a, en effet, port simultanment sur la dure du travail, son organisation, les conditions de travail

Cdric Afsa; Pierre Biscourp

2004-01-01

95

La rforme du systme de sant amricain : entre assurance et solidarit  

Microsoft Academic Search

[fre] La rforme du systme de sant amricain : entre assurance et solidarit . La rforme du systme de sant amricain envisage en 1993 devait permettre une couverture mdicale universelle et une amlioration des mcanismes financiers du secteur, tout en sauvegardant le jeu de la concurrence. Il s'agissait de mutualiser les risques un niveau suprieur celui de l'assurance

Kim Sbastien Pham

1996-01-01

96

Confrontos e confluncias entre a sociologia da lin guagem de Bourdieu e teorias lingsticas  

Microsoft Academic Search

Resumo: Discusso das relaes polmicas que se estabelecer am entre a sociologia da linguagem de Bourdieu e lingistas franceses, em to rno das noes de lngua, comunicao e gramaticalidade. Palavras-chave: sociologia da linguagem, lingstica, lngua, discu rso. Abstract: Discussion of the polemics relations between Bourdi eu's sociology of language and french linguists about the concepts of langue , communication and

Sheila Vieira de Camargo

2003-01-01

97

APPAREILLAGE DESTIN A L'TUDE DE LA THERMOLUMINESCENCE ENTRE 77 K ET 773 K  

E-print Network

471 APPAREILLAGE DESTIN? A L'?TUDE DE LA THERMOLUMINESCENCE ENTRE 77 K ET 773 K S. SANZELLE, J. C dispositif, bien que conçu pour effectuer des mesures expérimentales de thermoluminescence, peut être utilisé pour des mesures dosimétriques de routine. Il permet l'étude de la thermoluminescence induite par

Paris-Sud XI, Université de

98

Competencia entre estmulos condicionales propioceptivos y exteroceptivos en una tarea de discriminacin condicional  

Microsoft Academic Search

Se realiz un experimento con sujetos humanos de edades comprendidas entre los 7 y los 53 aos en el que se utiliz un procedimiento de discriminacin condicional con muestras compuestas formadas por estmulos exteroceptivos (figuras geomtricas coloreadas) y propioceptivos (diferentes formas de sealar tales figuras). De esta forma, los sujetos fueron entrenados a emitir una conducta diferencial ante cada muestra

Mara Teresa Rodrguez Garca; Andrs Garca Garca; Mara Teresa; Gutirrez Domnguez; Vicente Prez Fernndez; Cristbal Bohrquez Zayas

2009-01-01

99

Transfer^encia de Dados entre Grupos de Processos no Modelo BAR  

E-print Network

comportamento de um sistema com n´os Racionais, ´e poss´ivel recorrer `a Teoria de Jogos[16], na qual o conjunto de interac¸c~oes entre n´os ´e visto como um jogo, em que os jogadores correspondem `as entidades e

Rodrigues, Luís E.T.

100

Interactions audio-tactiles et perception de la parole : Comparaisons entre sujets aveugles et voyants  

E-print Network

Interactions audio-tactiles et perception de la parole : Comparaisons entre sujets aveugles et the speaker's face modulates the decoding of speech. Audio-tactile perception was compared to audio performed a phonemic decision task in three conditions: audio-only, congruent audio-tactile, and incongruent

Paris-Sud XI, Université de

101

ENTR 451-1: Health Sciences Entrepreneurship, CRN 13299 CGS 729-01: Biomedical Commercialization  

E-print Network

ENTR 451-1: Health Sciences Entrepreneurship, CRN 13299 CGS 729-01: Biomedical Commercialization BIOE 850: Biomedical Technology Entrepreneurship Fall Semester 2013 Dr. Kelly Shaver, College. The biotechnology industry as a whole is one of the fastest growing sectors in the economy. This is especially true

Young, Paul Thomas

102

FUNDAMENTACIN El tenis es un popular deporte de raqueta a nivel mundial. Se puede jugar entre dos  

E-print Network

TENIS FUNDAMENTACI?N El tenis es un popular deporte de raqueta a nivel mundial. Se puede jugar entre dos personas en individuales y entre dos parejas en dobles. Este deporte es uno de los más famosos en el mundo, destacando en mundiales y olimpiadas. Es considerado un deporte profesional y es jugado

Escolano, Francisco

103

Producer Relationships and Local Development in Fresh Fruit Commodity Chains: An Analysis of Blueberry Production in Entre Ros, Argentina  

Microsoft Academic Search

Craviotti C. Producer relationships and local development in fresh fruit commodity chains: an analysis of blueberry production in Entre Ros, Argentina, Regional Studies. In current regional perspectives intangible capitals are considered critical assets of regional economies. The aim of this article is to analyse the role of networks in the development of blueberry production in the province of Entre Ros,

Clara Craviotti

2011-01-01

104

Producer Relationships and Local Development in Fresh Fruit Commodity Chains: An Analysis of Blueberry Production in Entre Ros, Argentina  

Microsoft Academic Search

Craviotti C. Producer relationships and local development in fresh fruit commodity chains: an analysis of blueberry production in Entre Ros, Argentina, Regional Studies. In current regional perspectives intangible capitals are considered critical assets of regional economies. The aim of this article is to analyse the role of networks in the development of blueberry production in the province of Entre Ros,

Clara Craviotti

2012-01-01

105

Las difciles relaciones entre teora, prctica y metodologa en la psicologa del siglo XXI. (I) Sobre algunas disyuntivas  

Microsoft Academic Search

Las decisiones prcticas en las ciencias del comportamiento se han venido apoyando en conocimientos supuestamente obtenidos a partir de indagaciones que, tambin supuestamente, siguen las normas de la investigacin cientfica. Retomar la distincin entre sistemas sociales y epistemolgicos implicada en la oposicin entre el sistema ciencia-tcnica y el sistema interaccin-comunicacin permite entender por qu la llamada investigacin cientfica en el

Juan Delgado Snchez-Mateos

2008-01-01

106

Relation entre les caractristiques des table-bancs et les mesures anthropomtriques des coliers au Benin  

PubMed Central

Introduction Le mobilier scolaire et la posture assise en classe sont souvent impliqus dans l'apparition des douleurs rachidiennes, influant de fait sur la qualit des tches ralises par les apprenants. Aucune tude n'a encore vrifi le degr d'adquation entre les caractristiques du mobilier et celles des coliers au Bnin. L'objectif de cette tude transversale est donc de dterminer la relation entre les dimensions des table-bancs utilises en classe et les mesures anthropomtriques des coliers au Bnin. Methods Elle a t ralise avec un chantillon probabiliste de 678 coliers, gs de 4 17 ans. Les mesures anthropomtriques des coliers et les mensurations relatives aux longueurs, largeurs et hauteurs des table-bancs ont t mesures, puis intgres aux quations proposes dans la littrature. Les pourcentages des valeurs situes hors des limitesacceptables, drives de l'application des quations ont t calculs. Results La largeur et la hauteur des table-bancs utilises par les coliers taient plus leves (p < 0,05) que les valeurs de rfrence recommandes par les structures officielles de contrle et de production des mobiliers scolaires au Bnin. Quel que soit le sexe, il y avait une inadquation entre la largeur du banc et la longueur fesse-poplit, puis entre la hauteur de la table et la distance coude-bancdes coliers. Conclusion Les rsultats suggrent de prendre en compte lvolution des mesures anthropomtriques des coliers dans la confection des table-bancs, afin de promouvoir de bonnes postures assises en classe et de rduire le risque de troubles du rachis. PMID:25317232

Falola, Stve Marjelin; Gouthon, Polycarpe; Falola, Jean-Marie; Fiogbe, Michel Armand; Nigan, Issiako Bio

2014-01-01

107

Une analyse conomtrique des liens entre l'inflation, le chmage et la nature des anticipations  

Microsoft Academic Search

[fre] L'objet de cet article est de soumettre des tests empiriques les trois theses : keynesienne, montariste, Nouvelle conomie classique, en utilisant une procdure suggre et applique par J. Stein. Aprs avoir mis en lumire les liens entre ces trois thses et les approches formules en matire de formation des anticipations, nous montrons qu'en matire d'explication du chmage aucune

Jean-Pierre Gourlaouen

1983-01-01

108

Penas sin importancia y To Vania: Dilogo pardico entre Chejov y Gambaro  

E-print Network

FALL 1997 5 Penas sin importancia y To Vania: Dilogo pardico entre Chejov y Gmbaro Hortensia R. Morell Tanto el lector inocente que se dispone a la lectura del libreto de Penas sin importancia (1991), una de las ltimas piezas teatrales de... que vengan" (Ure 19). Penas sin importancia ahonda en esa vena doblemente histrinica y facilita un atisbo en lo que Eduardo Rovner ha reconocido como el cuestionamiento en el teatro argentino de la dcada de los ochenta de los valores instalados...

Morell, Hortensia R.

1997-10-01

109

BEMS-Assisted Seasonal Functional Performance Testing in the Initial Commissioning of Kista Entre and Katsan  

E-print Network

BEMS-ASSISTED SEASONAL FUNCTIONAL PERFORMANCE TESTING IN THE INITIAL COMMISSIONING OF KISTA ENTR? AND KATSAN Per Isakson*, Per Wetterstr?m** and P?r Carling*** * Building Sciences KTH, Stockholm SWEDEN. per.isakson@byv.kth.se ** Vasakronan..., Stockholm, SWEDEN. per.wetterstrom@vasakronan.se *** ?F-Installation, Stockholm, SWEDEN. par.carling@af.se This paper reports on some concrete experiences from using intensive trending and visualization in the evaluation of the performance...

Isakson, P.; Wetterstrom, P.; Carling, P.

2004-01-01

110

Entre el ser y el parecer: La dualidad de los personajes dramticos en Saverio el cruel  

E-print Network

LATIN AMERICAN THEATRE REVIEW Saverio Piano real SER - "derrotado" - "infeliz" - "expresin de perro que busca simpata" - tmido - "indeciso" - "antimilitarista" - "ngel" mal vestido "Saverio el mantequero" relacin de inversin Coronel... no distingue entre un nivel y otro y que lleva finalmente a una delimitacin confusa de cada uno de ellos, crendose una nueva categora espacial en la cual se funden la cordura y la locura, el espacio de la ambivalencia. Esta caracterizacin de los...

Sanhueza, Ma. Teresa

2001-10-01

111

Les mandres du dveloppement agricole au Lac Alaotra, Madagascar Entre inconstance politique et innovation technique  

E-print Network

1 Les méandres du développement agricole au Lac Alaotra, Madagascar Entre inconstance politique et Antananarivo, Madagascar Discipline ; socio-économie Téléphone : 00 261 (0) 34 044 63 29 Penot@cirad.fr Résumé Madagascar, région à forte immigration et zone de prédilection de l'aide publique au développement, est

Paris-Sud XI, Université de

112

Pleistocene Charophyta from Arroyo Perucho Verna, Province of Entre Rios, Argentina  

Microsoft Academic Search

The Pleistocene charophytes from Arroyo Perucho Verna, Province of Entre Ros, were analyzed.Chara contraria Br. ex Ktz.,C. contraria var.longilinea Cceres,C. globularis Thuill. andTolypella intricata (Trent. ex Roth.) Leonh. var.apiculata (A. Br.) Wood were described and illustrated with scanning electron microscope. The assemblage indicates fresh alkaline to slightly saline waters, not very deep, in a lentic or sometimes lotic environment. Extant

Adriana Garcia

1994-01-01

113

Contrle structural du partage de Rb entre fluide et micas potassiques dans les pegmatites du Brsil  

E-print Network

Contrôle structural du partage de Rb entre fluide et micas potassiques dans les pegmatites du Brésil Structural control of the Rb distribution between K- micas and fluid in Brazil pegmatites Joël Résumé L'étude géochimique des micas de pegmatites de l'état de Minas Gerais au Brésil a été effectuée à

Boyer, Edmond

114

Les trajets domicile-travail en le-de-France. Contrastes entre catgories socioprofessionnelles  

Microsoft Academic Search

[spa] Los viajes casa-lugar de trabajo en la region Ile-de-France . Contrastes entre categorfas socioprofesionales . En la region Ile-de-France, los viajes casa-lugar de trabajo varfan con creces segn las profesiones : desde un promedio de 5 kms para los artesanos-comerciantes y personales de servicio, hasta unos 9 kms para los ejecutivos, las profesiones intermediarias, los empleados y los obreros.

Brigitte Baccani

1996-01-01

115

LA TEORIA DE LA DISONANCIA: UN ENCUENTRO ENTRE MUSICA Y MATEMATICAS  

E-print Network

LA TEOR´IA DE LA DISONANCIA: UN ENCUENTRO ENTRE M´USICA Y MATEM´ATICAS XAVIER GR`ACIA Dep. Matem´usica y matem´atica Espectros de los instrumentos musicales Teor´ia de las escalas Teor´ia de la) Disonancia, m´usica y matem´aticas 3 / 48 La consonancia Pit´agoras de Samos, siglo VI aC Dos cuerdas

Gràcia, Xavier

116

Du bois mort pour la biodiversit. Des forestiers entre doute et engagement Philippe Deuffic  

E-print Network

1 Du bois mort pour la biodiversité. Des forestiers entre doute et engagement Philippe Deuffic UR mort est un facteur clé pour la biodiversité forestière, retenu au titre des indicateurs de gestion'?le-de-France afin de cerner les pratiques et les représentations sociales associées au bois mort Les résultats de l

Paris-Sud XI, Université de

117

Transfert radiatif entre une petite particule et un dilectrique: application au chauffage local  

NASA Astrophysics Data System (ADS)

nous montrons dans cette tude que le transfert radiatif entre une particule de taille nanomtrique et un dilectrique petit tre trs important lorsque les distances mises en jeu sont petites devant la longueur d'onde caractristique du rayonnement thermique. Ce transfert peut devenir dominant lorsque les matriaux utiliss sont polaires. Nous discuterons de la possibilit d'appliquer ces rsultats au chauffage local dans les nano-structures.

Mulet, J.-P.; Joulain, K.; Carminati, R.; Greffet, J. J.

2002-06-01

118

In Planta Stage-Specific Fungal Gene Profiling Elucidates the Molecular Strategies of Fusarium graminearum Growing inside Wheat Coleoptiles[W][OA  

PubMed Central

The ascomycete Fusarium graminearum is a destructive fungal pathogen of wheat (Triticum aestivum). To better understand how this pathogen proliferates within the host plant, we tracked pathogen growth inside wheat coleoptiles and then examined pathogen gene expression inside wheat coleoptiles at 16, 40, and 64 h after inoculation (HAI) using laser capture microdissection and microarray analysis. We identified 344 genes that were preferentially expressed during invasive growth in planta. Gene expression profiles for 134 putative plant cell walldegrading enzyme genes suggest that there was limited cell wall degradation at 16 HAI and extensive degradation at 64 HAI. Expression profiles for genes encoding reactive oxygen species (ROS)related enzymes suggest that F. graminearum primarily scavenges extracellular ROS before a later burst of extracellular ROS is produced by F. graminearum enzymes. Expression patterns of genes involved in primary metabolic pathways suggest that F. graminearum relies on the glyoxylate cycle at an early stage of plant infection. A secondary metabolite biosynthesis gene cluster was specifically induced at 64 HAI and was required for virulence. Our results indicate that F. graminearum initiates infection of coleoptiles using covert penetration strategies and switches to overt cellular destruction of tissues at an advanced stage of infection. PMID:23266949

Zhang, Xiao-Wei; Jia, Lei-Jie; Zhang, Yan; Jiang, Gang; Li, Xuan; Zhang, Dong; Tang, Wei-Hua

2012-01-01

119

Involvement of Pinus taeda MYB1 and MYB8 in phenylpropanoid metabolism and secondary cell wall biogenesis: a comparative in planta analysis  

PubMed Central

The involvement of two R2R3-MYB genes from Pinus taeda L., PtMYB1 and PtMYB8, in phenylpropanoid metabolism and secondary cell wall biogenesis was investigated in planta. These pine MYBs were constitutively overexpressed (OE) in Picea glauca (Moench) Voss, used as a heterologous conifer expression system. Morphological, histological, chemical (lignin and soluble phenols), and transcriptional analyses, i.e. microarray and reverse transcription quantitative PCR (RT-qPCR) were used for extensive phenotyping of MYB-overexpressing spruce plantlets. Upon germination of somatic embryos, root growth was reduced in both transgenics. Enhanced lignin deposition was also a common feature but ectopic secondary cell wall deposition was more strongly associated with PtMYB8-OE. Microarray and RT-qPCR data showed that overexpression of each MYB led to an overlapping up-regulation of many genes encoding phenylpropanoid enzymes involved in lignin monomer synthesis, while misregulation of several cell wall-related genes and other MYB transcription factors was specifically associated with PtMYB8-OE. Together, the results suggest that MYB1 and MYB8 may be part of a conserved transcriptional network involved in secondary cell wall deposition in conifers. PMID:18805909

Bomal, Claude; Bedon, Frank; Caron, Sbastien; Mansfield, Shawn D.; Levasseur, Caroline; Cooke, Janice E. K.; Blais, Sylvie; Tremblay, Laurence; Morency, Marie-Jose; Pavy, Nathalie; Grima-Pettenati, Jacqueline; Sguin, Armand; MacKay, John

2008-01-01

120

In Planta Biocontrol of Pectobacterium atrosepticum by Rhodococcus erythropolis Involves Silencing of Pathogen Communication by the Rhodococcal Gamma-Lactone Catabolic Pathway.  

PubMed

The virulence of numerous Gram-negative bacteria is under the control of a quorum sensing process based on synthesis and perception of N-acyl homoserine lactones. Rhodococcus erythropolis, a Gram-positive bacterium, has recently been proposed as a biocontrol agent for plant protection against soft-rot bacteria, including Pectobacterium. Here, we show that the ?-lactone catabolic pathway of R. erythropolis disrupts Pectobacterium communication and prevents plant soft-rot. We report the first characterization and demonstration of N-acyl homoserine lactone quenching in planta. In particular, we describe the transcription of the R. erythropolis lactonase gene, encoding the key enzyme of this pathway, and the subsequent lactone breakdown. The role of this catabolic pathway in biocontrol activity was confirmed by deletion of the lactonase gene from R. erythropolis and also its heterologous expression in Escherichia coli. The ?-lactone catabolic pathway is induced by pathogen communication rather than by pathogen invasion. This is thus a novel and unusual biocontrol pathway, differing from those previously described as protecting plants from phytopathogens. These findings also suggest the existence of an additional pathway contributing to plant protection. PMID:23805254

Barbey, Corinne; Crpin, Alexandre; Bergeau, Dorian; Ouchiha, Asma; Mijouin, Lily; Taupin, Laure; Orange, Nicole; Feuilloley, Marc; Dufour, Alain; Burini, Jean-Franois; Latour, Xavier

2013-01-01

121

Mutations in the Capsid Protein of Brome Mosaic Virus Affecting Encapsidation Eliminate Vesicle Induction In Planta: Implications for Virus Cell-to-Cell Spread  

PubMed Central

Positive-strand RNA viruses are known to rearrange the endomembrane network to make it more conducive for replication, maturation, or egress. Our previous transmission electron microscopic (TEM) analysis showed that ectopic expression of wild-type (wt) capsid protein (CP) of Brome mosaic virus (BMV) has an intrinsic property of modifying the endoplasmic reticulum (ER) to induce vesicles similar to those present in wt BMV infection. In this study, we evaluated the functional significance of CP-mediated vesicle induction to the BMV infection cycle in planta. Consequently, the cytopathologic changes induced by wt CP or its mutants defective in virion assembly due to mutations engineered in either N- or C-proximal domains were comparatively analyzed by TEM in two susceptible (Nicotiana benthamiana and Chenopodium quinoa) and one nonhost (N. clevelandii) plant species. The results showed that in susceptible hosts, CP-mediated ER-derived vesicle induction is contingent on the expression of encapsidation-competent CP. In contrast, unlike in N. benthamiana and C. quinoa, transient expression of wt CP in nonhost N. clevelandii plants eliminated vesicle induction. Additionally, comparative source-to-sink analysis of virus spread in leaves of N. benthamiana and N. clevelandii coexpressing wt BMV and Cucumber mosaic virus (CMV) showed that despite trans-encapsidation, CMV failed to complement the defective cell-to-cell movement of BMV. The significance and relation of CP-mediated vesicle induction to virus cell-to-cell movement are discussed. PMID:23741003

Bamunusinghe, Devinka; Chaturvedi, Sonali; Seo, Jang-Kyun

2013-01-01

122

Mutations in the capsid protein of Brome mosaic virus affecting encapsidation eliminate vesicle induction in planta: implications for virus cell-to-cell spread.  

PubMed

Positive-strand RNA viruses are known to rearrange the endomembrane network to make it more conducive for replication, maturation, or egress. Our previous transmission electron microscopic (TEM) analysis showed that ectopic expression of wild-type (wt) capsid protein (CP) of Brome mosaic virus (BMV) has an intrinsic property of modifying the endoplasmic reticulum (ER) to induce vesicles similar to those present in wt BMV infection. In this study, we evaluated the functional significance of CP-mediated vesicle induction to the BMV infection cycle in planta. Consequently, the cytopathologic changes induced by wt CP or its mutants defective in virion assembly due to mutations engineered in either N- or C-proximal domains were comparatively analyzed by TEM in two susceptible (Nicotiana benthamiana and Chenopodium quinoa) and one nonhost (N. clevelandii) plant species. The results showed that in susceptible hosts, CP-mediated ER-derived vesicle induction is contingent on the expression of encapsidation-competent CP. In contrast, unlike in N. benthamiana and C. quinoa, transient expression of wt CP in nonhost N. clevelandii plants eliminated vesicle induction. Additionally, comparative source-to-sink analysis of virus spread in leaves of N. benthamiana and N. clevelandii coexpressing wt BMV and Cucumber mosaic virus (CMV) showed that despite trans-encapsidation, CMV failed to complement the defective cell-to-cell movement of BMV. The significance and relation of CP-mediated vesicle induction to virus cell-to-cell movement are discussed. PMID:23741003

Bamunusinghe, Devinka; Chaturvedi, Sonali; Seo, Jang-Kyun; Rao, A L N

2013-08-01

123

In Planta Biocontrol of Pectobacterium atrosepticum by Rhodococcus erythropolis Involves Silencing of Pathogen Communication by the Rhodococcal Gamma-Lactone Catabolic Pathway  

PubMed Central

The virulence of numerous Gram-negative bacteria is under the control of a quorum sensing process based on synthesis and perception of N-acyl homoserine lactones. Rhodococcus erythropolis, a Gram-positive bacterium, has recently been proposed as a biocontrol agent for plant protection against soft-rot bacteria, including Pectobacterium. Here, we show that the ?-lactone catabolic pathway of R. erythropolis disrupts Pectobacterium communication and prevents plant soft-rot. We report the first characterization and demonstration of N-acyl homoserine lactone quenching in planta. In particular, we describe the transcription of the R. erythropolis lactonase gene, encoding the key enzyme of this pathway, and the subsequent lactone breakdown. The role of this catabolic pathway in biocontrol activity was confirmed by deletion of the lactonase gene from R. erythropolis and also its heterologous expression in Escherichia coli. The ?-lactone catabolic pathway is induced by pathogen communication rather than by pathogen invasion. This is thus a novel and unusual biocontrol pathway, differing from those previously described as protecting plants from phytopathogens. These findings also suggest the existence of an additional pathway contributing to plant protection. PMID:23805254

Barbey, Corinne; Crpin, Alexandre; Bergeau, Dorian; Ouchiha, Asma; Mijouin, Lily; Taupin, Laure; Orange, Nicole; Feuilloley, Marc; Dufour, Alain; Burini, Jean-Franois; Latour, Xavier

2013-01-01

124

CONFRONTATION ENTRE MODLES ET DONNES RELLES POUR LA STRUCTURE SPATIALE DES MOLCULES D'ADN PAR LE BIAIS  

E-print Network

CONFRONTATION ENTRE MOD?LES ET DONN?ES R?ELLES POUR LA STRUCTURE SPATIALE DES MOL?CULES D'ADN PAR'analyse des séquences. Les propriétés géométriques de l'ADN sont très peu étudiées, en particulier pour de grands segments d'ADN. C'est justement sur ce dernier verrou que la synergie entre informaticiens et

Paris-Sud XI, Université de

125

Salinity-induced accumulation of organic osmolytes in barley and wheat leaves correlates with increased oxidative stress tolerance: in planta evidence for cross-tolerance.  

PubMed

Salinity tolerance in plants is dependent on their abilities to adjust osmotically to reduced soil water potential and to keep intracellular ROS levels under control. Both these processes are believed to rely on de novo synthesis of organic osmolytes (traditionally defined as compatible solutes). However direct in planta evidence for anti-oxidant roles of compatible solutes are scarce. In this work, we induced changes in the level of endogenous organic osmolytes by exposing plants to various levels of NaCl (salinity stress; 50-300mM range) and then studying sensitivity of leaves to oxidative (UV-B) stress. Increase in the external NaCl concentrations was accompanied by the progressive accumulation in leaf Na(+). This accumulation was much higher in old leaves compared with young ones. In old leaves, three major inorganic ions (Na(+), Cl(-) and K(+)) have made 67.7% and 70.4% of leaf osmotic potential (in wheat and barley, respectively) when exposed to 200mM NaCl treatment, while in young leaves their contribution was only 43.9% and 46.8%, respectively. Here, organic osmolytes played a substantial role in leaf osmotic adjustment. Increased accumulation of organic osmolytes correlated strongly with activity of PSII in leaves exposed to oxidation inducing UV-B treatment in both species (R(2)=0.50 for wheat and 0.71 for barley). We conclude that salinity-induced accumulation of organic osmolytes in barley and wheat leaves correlates with increased oxidative stress tolerance and provides the evidence for a mechanism of cross-tolerance between these two stresses. PMID:25068241

Puniran-Hartley, Norhawa; Hartley, Joseph; Shabala, Lana; Shabala, Sergey

2014-10-01

126

XerR, a negative regulator of XccR in Xanthomonas campestris pv. campestris, relieves its repressor function in planta  

PubMed Central

We previously reported that XccR, a LuxR-type regulator of Xanthomonas campestris pv. campestris (Xcc), activates the downstream proline iminopeptidase virulence gene (pip) in response to certain host plant factor(s). In this report, we further show that the expression of the xccR gene was repressed in the culture medium by an NtrC-type response regulator, which we named XerR (XccR expression-related, repressor), and that this repression was relieved when the bacteria were grown in planta. Such a regulatory mechanism is reinforced by the observations that XerR directly bound to the xccR promoter in vitro, and that mutations at the phosphorylation-related residues of XerR resulted in the loss of its repressor function. Furthermore, the expression level of xccR increased even in XerR-overexpressing Xcc cells when they were vacuum infiltrated into cabbage plants. We also preliminarily characterized the host factor(s) involved in the above mentioned interactions between Xcc and the host plant, showing that a plant material(s) with molecular weight(s) less than 1 kDa abolished the binding of XerR to the xccR promoter, while the same material enhanced the binding of XccR to the luxXc box in the pip promoter. Taken together, our results implicate XerR in a new layer of the regulatory mechanism controlling the expression of the virulence-related xccR/pip locus and provide clues to the identification of plant signal molecules that interact with XerR and XccR to enhance the virulence of Xcc. PMID:21483448

Wang, Li; Zhang, Lili; Geng, Yunfeng; Xi, Wei; Fang, Rongxiang; Jia, Yantao

2011-01-01

127

The CRISPR/Cas system can be used as nuclease for in planta gene targeting and as paired nickases for directed mutagenesis in Arabidopsis resulting in heritable progeny.  

PubMed

The CRISPR/Cas nuclease is becoming a major tool for targeted mutagenesis in eukaryotes by inducing double-strand breaks (DSBs) at pre-selected genomic sites that are repaired by non-homologous end joining (NHEJ) in an error-prone way. In plants, it could be demonstrated that the Cas9 nuclease is able to induce heritable mutations in Arabidopsis thaliana and rice. Gene targeting (GT) by homologous recombination (HR) can also be induced by DSBs. Using a natural nuclease and marker genes, we previously developed an in planta GT strategy in which both a targeting vector and targeting locus are activated simultaneously via DSB induction during plant development. Here, we demonstrate that this strategy can be used for natural genes by CRISPR/Cas-mediated DSB induction. We were able to integrate a resistance cassette into the ADH1 locus of A.thaliana via HR. Heritable events were identified using a PCR-based genotyping approach, characterised by Southern blotting and confirmed on the sequence level. A major concern is the specificity of the CRISPR/Cas nucleases. Off-target effects might be avoided using two adjacent sgRNA target sequences to guide the Cas9 nickase to each of the two DNA strands, resulting in the formation of a DSB. By amplicon deep sequencing, we demonstrate that this Cas9 paired nickase strategy has a mutagenic potential comparable with that of the nuclease, while the resulting mutations are mostly deletions. We also demonstrate the stable inheritance of such mutations in A.thaliana. PMID:25327456

Schiml, Simon; Fauser, Friedrich; Puchta, Holger

2014-12-01

128

High-throughput in planta expression screening identifies an ADP-ribosylation factor (ARF1) involved in non-host resistance and R gene-mediated resistance.  

PubMed

To identify positive regulators of cell death in plants, we performed a high-throughput screening, employing potato virus X-based overexpression in planta of a cDNA library derived from paraquat-treated Nicotiana benthamiana leaves. The screening of 30,000 cDNA clones enabled the identification of an ADP-ribosylation factor 1 (ARF1) that induces cell death when overexpressed in N. benthamiana. Overexpression of the guanosine diphosphate (GDP)-locked mutant of ARF1 did not trigger cell death, suggesting that ARF1 guanosine triphosphatase (GTPase) activity is necessary for the observed cell death-inducing activity. The ARF1 transcript level increased strongly following treatment with Phytophthora infestans elicitor INF1, as well as inoculation with a non-host pathogen Pseudomonas cichorii in N. benthamiana. In addition, ARF1 was induced in the interaction between the N gene and tobacco mosaic virus (TMV) in Nicotiana tabacum. By contrast, inoculation with the virulent pathogen Pseudomonas syringae pv. tabaci did not affect ARF1 expression in N. benthamiana. Virus-induced gene silencing of ARF1 in N. benthamiana resulted in a stunted phenotype, and severely hampered non-host resistance towards P. cichorii. In addition, ARF1 silencing partially compromised resistance towards TMV in N. benthamiana containing the N resistance gene. By contrast, and in accordance with the ARF1 gene expression profile, silencing of ARF1 transcription did not alter the susceptibility of N. benthamiana towards the pathogen P. syringae pv. tabaci. These results strongly implicate ARF1 in the non-host resistance to bacteria and N gene-mediated resistance in N. benthamiana. PMID:18705881

Coemans, Bert; Takahashi, Yoshihiro; Berberich, Thomas; Ito, Akiko; Kanzaki, Hiroyuki; Matsumura, Hideo; Saitoh, Hiromasa; Tsuda, Shinya; Kamoun, Sophien; Sgi, Lszl; Swennen, Rony; Terauchi, Ryohei

2008-01-01

129

In Planta Assessment of the Role of Thioredoxin h Proteins in the Regulation of S-Locus Receptor Kinase Signaling in Transgenic Arabidopsis1[W][OPEN  

PubMed Central

The self-incompatibility (SI) response of the Brassicaceae is mediated by allele-specific interaction between the stigma-localized S-locus receptor kinase (SRK) and its ligand, the pollen coat-localized S-locus cysteine-rich protein (SCR). Based on work in Brassica spp., the thioredoxin h-like proteins THL1 and THL2, which interact with SRK, have been proposed to function as oxidoreductases that negatively regulate SRK catalytic activity. By preventing the spontaneous activation of SRK in the absence of SCR ligand, these thioredoxins are thought to be essential for the success of cross pollinations in self-incompatible plants. However, the in planta role of thioredoxins in the regulation of SI signaling has not been conclusively demonstrated. Here, we addressed this issue using Arabidopsis thaliana plants transformed with the SRKb-SCRb gene pair isolated from self-incompatible Arabidopsis lyrata. These plants express an intense SI response, allowing us to exploit the extensive tools and resources available in A. thaliana for analysis of SI signaling. To test the hypothesis that SRK is redox regulated by thioredoxin h, we expressed a mutant form of SRKb lacking a transmembrane-localized cysteine residue thought to be essential for the SRK-thioredoxin h interaction. We also analyzed transfer DNA insertion mutants in the A. thaliana orthologs of THL1 and THL2. In neither case did we observe an effect on the pollination responses of SRKb-expressing stigmas toward incompatible or compatible pollen. Our results are consistent with the conclusion that, contrary to their proposed role, thioredoxin h proteins are not required to prevent the spontaneous activation of SRK in the A. thaliana stigma. PMID:24077073

Yamamoto, Masaya; Nasrallah, June B.

2013-01-01

130

In planta assessment of the role of thioredoxin h proteins in the regulation of S-locus receptor kinase signaling in transgenic Arabidopsis.  

PubMed

The self-incompatibility (SI) response of the Brassicaceae is mediated by allele-specific interaction between the stigma-localized S-locus receptor kinase (SRK) and its ligand, the pollen coat-localized S-locus cysteine-rich protein (SCR). Based on work in Brassica spp., the thioredoxin h-like proteins THL1 and THL2, which interact with SRK, have been proposed to function as oxidoreductases that negatively regulate SRK catalytic activity. By preventing the spontaneous activation of SRK in the absence of SCR ligand, these thioredoxins are thought to be essential for the success of cross pollinations in self-incompatible plants. However, the in planta role of thioredoxins in the regulation of SI signaling has not been conclusively demonstrated. Here, we addressed this issue using Arabidopsis thaliana plants transformed with the SRKb-SCRb gene pair isolated from self-incompatible Arabidopsis lyrata. These plants express an intense SI response, allowing us to exploit the extensive tools and resources available in A. thaliana for analysis of SI signaling. To test the hypothesis that SRK is redox regulated by thioredoxin h, we expressed a mutant form of SRKb lacking a transmembrane-localized cysteine residue thought to be essential for the SRK-thioredoxin h interaction. We also analyzed transfer DNA insertion mutants in the A. thaliana orthologs of THL1 and THL2. In neither case did we observe an effect on the pollination responses of SRKb-expressing stigmas toward incompatible or compatible pollen. Our results are consistent with the conclusion that, contrary to their proposed role, thioredoxin h proteins are not required to prevent the spontaneous activation of SRK in the A. thaliana stigma. PMID:24077073

Yamamoto, Masaya; Nasrallah, June B

2013-11-01

131

Post-abscission, pre-dispersal seeds of Digitalis purpurea remain in a developmental state that is not terminated by desiccation ex planta  

PubMed Central

Background and Aims Seed quality may be compromised if seeds are harvested before natural dispersal (shedding). It has been shown previously that slow or delayed drying can increase potential quality compared with immediate rapid drying. This study set out to investigate whether or not there is a critical moisture content, below which drying terminates maturation events for seeds harvested after mass maturity but before dispersal. Methods Seeds of foxglove (Digitalis purpurea) in the post-abscission pre-dispersal phase were held at between 15 and 95 % RH for 4 or 8 d, with or without re-hydration to 95 % RH for a further 4 d, before drying to equilibrium at 15 % RH. In addition, dry seeds were primed for 48 h at ?1 MPa. Subsequent seed longevity was assessed at 60 % RH and 45 C. Key Results Rate of germination and longevity were improved by holding seeds at a wide range of humidities after harvest. Longevity was further improved by re-hydration at 95 % RH. Priming improved the longevity of the seeds dried immediately after harvest, but not of those first held at 95 % RH for 8 d prior to drying. Conclusions Maturation continued ex planta in these post-abscission, pre-dispersal seeds of D. purpurea dried at 1580 % RH at a rate correlated positively with RH (cf. ageing of mature seeds). Subsequent re-hydration at 95 % RH enabled a further improvement in quality. Priming seeds initially stored air-dry for 3 months also allowed maturation events to resume. However, once individual seeds within the population had reached maximum longevity, priming had a negative impact on their subsequent survival. PMID:19136494

Butler, L. H.; Hay, F. R.; Ellis, R. H.; Smith, R. D.

2009-01-01

132

[Phlebotominae: vectors of leishmaniasis in the provinces of Santa Fe and Entre Ros, Argentina].  

PubMed

The transmission of tegumentary leishmaniasis (TL) has increased in 9 provinces of Argentina since 1985. Santa Fe and Entre Ros did not record in this period autochtonous probed cases: however, an epidemic outbreak took place in 2003 in Bella Vista, Corrientes, located in an area with ecological continuity and contiguous to both provinces. In order to evaluate the potential risk of transmission of LT, Phlebotominae were captured at locations close to and southern from Bella Vista during February 2004. The traps located on the shores of Parana river in Santa Fe (El Rabn, Villa Ocampo, Cayast), and Entre Ros (La Paz. La Celina-Villa Urquiza) captured 860 individuals of Lutzomyia neivai (99.5%) and Lu. migonei (0.5 %), both species with vectorial capacity for Leishmania (V.) braziliensis. In Tartagal, Santa Fe, the captures were consistent with the residual "chaco" landscape, 7 individuals of Lu. nerivai, Lu. migonei and Lu. cortelezzii. The risk of LT epidemic transmission in these provinces is highlighted, mainly due to the progressive southern tropicalization of the paranaense gallery forest. Clinical and entomological surveillance is recommended. PMID:16871908

Salomn, Oscar D; Mocarbel, Nicols J; Pedroni, Elena; Colombo, Javier; Sandill, Mnica

2006-01-01

133

Alternaria alternata prevalence in cereal grains and soybean seeds from Entre Ros, Argentina.  

PubMed

A mycological survey was carried out at Entre Ros province, Argentina, on sorghum grain, maize, rice, soybean seeds and on freshly harvested and stored wheat. The isolation frequencies and relative densities of species belonging to genera Alternaria, Aspergillus, Fusarium, Penicillium and other fungi were calculated. Alternaria alternata was the major fungal species isolated from sorghum, rice, soybean seeds and on freshly harvested wheat, and a low incidence of Fusarium species was observed on the same substrates. In maize the major fungal species isolated was Fusarium verticillioides. The high incidence levels of A. alternata observed,suggest that it may be necessary to determine, among other mycotoxins, if Alternaria toxins occur in these commodities. PMID:17592893

Broggi, Leticia Elvira; Gonzlez, Hctor Horacio Lucas; Resnik, Silvia Liliana; Pacin, Ana

2007-03-01

134

Religiosidade, juventude e sexualidade: entre a autonomia e a rigidez1  

PubMed Central

Esse artigo descreve como jovens religiosos e autoridades religiosas de sua comunidade compreendem a sexualidade, considerando suas experincias pessoais e como membros de comunidades religiosas. A anlise pretende contribuir para que polticas pblicas dedicadas promoo da sade sexual da juventude considerem a religiosidade, no contexto de um estado laico e da promoo do direito preveno. Foram realizadas 26 entrevistas abertas e semidirigidas em diferentes comunidades da regio metropolitana da cidade de So Paulo (comunidades catlicas, da umbanda, do candombl e de diferentes denominaes evanglicas) sobre iniciao sexual, casamento, gravidez, contracepo e preveno das DST/Aids, homossexualidade, aborto e direitos humanos. Observou-se como jovens e autoridades religiosas convivem com a tenso entre tradio e modernidade e os distintos discursos sobre a sexualidade. Como sujeitos religiosos (do discurso religioso) e sujeitos sexuais (de discursos sobre sexualidade), devem ser incorporados pelos programas como sujeitos de direito nos termos de sua religiosidade. PMID:21886456

Silva, Cristiane Gonalves da; Santos, Alessandro Oliveira; Licciardi, Daniele Carli; Paiva, Vera; Parker, Richard

2009-01-01

135

Kingdom Plantae Douglas firs (left);  

E-print Network

major groups... True mosses (~14,000 species) Liverworts (~8500 species) Hornworts (~200 species) Group I: Non-Vascular Plants Examples of Mosses #12;4 Liverworts and Hornworts Sporophytes of a moss Group-living and photosynthetic #12;5 Clockwise from upper left: a fern; a club moss; a whisk fern; a horsetail Fern Life Cycle

Brown, Christopher A.

136

[Agrobacterium-mediated sunflower transformation (Helianthus annuus L.) in vitro and in Planta using strain of LBA4404 harboring binary vector pBi2E with dsRNA-suppressor proline dehydrogenase gene].  

PubMed

To estimate the efficiency of proline dehydrogenase gene suppression towards increasing of sunflower (Helianthus annuus L.) tolerance level to water deficit and salinity, we employed strain LBA4404 harboring pBi2E with double-stranded RNA-suppressor, which were prepared on basis arabidopsis ProDH1 gene. The techniques of Agrobacterium-mediated transformation in vitro and in planta during fertilization sunflower have been proposed. There was shown the genotype-depended integration of T-DNA in sunflower genome. PCR-analysis showed that ProDH1 presents in genome of inbred lines transformed in planta, as well as in T1- and T2-generations. In trans-genic regenerants the essential accumulation of free L-proline during early stages of in vitro cultivation under normal conditions was shown. There was established the essential accumulation of free proline in transgenic regenerants during cultivation under lethal stress pressure (0.4 M mannitol and 2.0% sea water salts) and its decline upon the recovery period. These data are declared about effectiveness of suppression of sunflower ProDH and gene participation in processes connected with osmotolerance. PMID:25184200

Tishchenko, E N; Komisarenko, A G; Mikhal'skaia, S I; Sergeeva, L E; Adamenko, N I; Morgun, B V; Kochetov, A V

2014-01-01

137

Cristallisation, syncristallisation, et alliages molculaires entre le lorazpam et l'oxazpam  

NASA Astrophysics Data System (ADS)

Le polymorphisme et pseudopolymorphisme du lorazpam et oxazpam ont t tudis par analyse thermique, calorimtrie diffrentielle balayage et diffraction de rayons X. Deux formes polymorphes du lorazpam et plusieurs mono et hemisolvates ont t isols partir de recristallisation dans divers soivants. Aucun polymorphisme ni solvate n'a t mis en vidence avec l'oxazpam. Les paramtres cristallographiques des phases isoles ont t dtermines. A 160 et 203C, le lorazpam et l'oxazpam perdent respectivement une molcule d'eau pour donner aprs rarrangement la quinazolinecarboxaldhyde correspondante. La syncristallisation des deux benzodiazpines dans le benzne conduit des alliages molculaires miscibilit totale l'tat solide dans tout le domaine de concentration entre l'exazpam el la forme ? du lorazpam, elle n'est que partielle avec la forme ?. Thermal analysis, differential scanning calorimetry, and X-ray diffraction were carried out to study the polymorphism and pseudopolymorphism of lorazepam and oxazepam. Two polymorphic forms of lorazepam and several mono- or hemisolvates were obtained after recrystallization from various solvents. No polymorphic form or solvate has been found for oxazepam. The crystallographic parameters of these new phases were determined. Lorazepam and oxazepam can lose a molecule of water at 160 and 203C, respectively, and rearrange to quinazolinecarboxaldehyde. Mixed crystals of the two benzodiazepines, after recrystallization from benzene, lead to molecular alloys with complete solid solubility between oxazepam and the ?-form of lorazepam over the whole range of composition but only to partial solubility with the ?-form of lorazepam.

Mascherpa-Corral, D.; Mascherpa, G.; Chauvet, A.

1993-04-01

138

Uma Comparao entre Tcnicas de Propagao de Erros em Astrofsica: Monte Carlo x Bootstrap  

NASA Astrophysics Data System (ADS)

Neste trabalho feito um estudo comparativo entre dois algoritmos numricos usados para propagao de erros em dados experimentais. Um deles conhecido por Mtodo de Monte carlo e o outro por Mtodo de Bootstrap. Recentemente, Dhullon & Watson argiram que a aplicao do mtodo de Monte Carlo introduz rudo nos dados, e propuseram ento a utilizao do Bootstrap como alternativa capaz de produzir resultados superiores. O objetivo deste trabalho testar a validade dessa afirmao. As duas tcnicas foram aplicadas a trs problemas diferentes: o ajsute de modelos de emisso LTE simples e atmosfera estelar a espectros estelares observados e o ajuste de curvas de luz de eclipses de Variveis Cataclsmicas para a detemrinao da distribuio radial de brilho dos seus discos de acrscimo. Os mtodos foram testados quanto sua robusteza, ou seja, a capacidade de prover resultados coerentes enre si. Alm disso, as solues dos mtodos foram comparadas. Os resultados indicam que no existe evidncia de superioridade de um mtodos em relao ao outro.

Zabot, Alexandre; Baptista, Raymundo

2005-07-01

139

O PARADIGMA DO RESSUPRIMENTO ENXUTO: ARMADILHA NA GESTO DO FLUXO DE MATERIAIS ENTRE ELOS DA CADEIA DE SUPRIMENTOS  

Microsoft Academic Search

Este artigo apresenta um estudo de caso conduzido numa empresa do ramo industrial, na qual a lgica do ressuprimento de materiais entre seu Centro de Distribuio e suas filiais comerciais era fortemente influenciada no apenas por metas de reduo dos nveis de estoque, mas tambm pela percepo que o ressuprimento enxuto (Just in Time) o estado da prtica a

Peter Wanke; Paulo Fernando Fleury

140

Construction de la plante de lupin blanc : rela-tions entre la quantit de matire sche forme  

E-print Network

entre l'émis- sion des axes apicaux et la mise en place du nombre de grains sur l'inflorescence emergence of lateral branches and seed setting on the main inflorescence. Partitioning was related AI). Ces axes portent, comme l'axe principal, une inflorescence terminale. Ils peu- vent donner eux

Paris-Sud XI, Université de

141

Le citadin et la nature : entre reprsentations et pratiques sociales de la nature sauvage et domestique Grenoble  

E-print Network

1 Le citadin et la nature : entre représentations et pratiques sociales de la nature sauvage et domestique à Grenoble The city dweller and the nature : between representations and social habits of the natural and urban environments in Grenoble Anthony TCHEKEMIAN Institut de Géographie Alpine - Grenoble I

Paris-Sud XI, Université de

142

Relation entre l'excrtion urinaire d'allantoine et le flux duodnal d'acide ribonuclique  

E-print Network

Relation entre l'excrétion urinaire d'allantoine et le flux duodénal d'acide ribonucléique F Vandceuvre, France. Summary. The relationship between allantoin excretion and duodenal RNA flows was studied. Between 73 and 85 % of the RNA disappeared in the gut. Urinary allantoin nitro- gen represented between 32

Paris-Sud XI, Université de

143

Assistanat d'enseignement --Poste offert En vertu d'une entente interuniversitaire entre l'Universit de la Colombie-  

E-print Network

Assistanat d'enseignement -- Poste offert En vertu d'une entente interuniversitaire entre l'Université de la Colombie- Britannique (Vancouver) et l'Université de Montréal, un poste d'assistant de français-2013. Description du poste : enseignement d'un cours de langue française au semestre d'hiver (du 1er janvier au 30

Parrott, Lael

144

L'ANTHROPOLOGIE ET LE POLITIQUE, LES PREMISSES. LES RELATIONS ENTRE FRANZ BOAS ET PAUL RIVET (1919-1942)  

E-print Network

1 L'ANTHROPOLOGIE ET LE POLITIQUE, LES PREMISSES. LES RELATIONS ENTRE FRANZ BOAS ET PAUL RIVET-IIAC) ______________________________________________________________________ Résumé : Nouée au retour à la vie civile, en 1919, la correspondance Franz Boas/Paul Rivet (129 lettres moment du décès de Franz Boas, au moment où ce dernier lui redit l'impérieuse nécessité de combattre le

Paris-Sud XI, Université de

145

A PESCA DE ARRASTO DE TALUDE DO SUDESTE E SUL DO BRASIL: TENDNCIAS DA FROTA NACIONAL ENTRE 2001 E 2003  

Microsoft Academic Search

A recente pesca de arrasto de talude do Sudeste-Sul do Brasil descrita neste trabalho a partir de 1.570 viagens realizadas por arrasteiros duplos e arrasteiros simples da frota nacional entre janeiro de 2001 e dezembro de 2003, todas monitoradas nos portos de Santa Catarina. A atividade produziu cerca de 32.000 t, das quais 80% foram desembarcadas por arrasteiros duplos

Jos Angel; Alvarez PEREZ; Paulo Ricardo PEZZUTO

146

Dclin de l'emploi industriel et tertiarisation accrue. L'emploi par secteur d'activit entre 1982 et 1990  

Microsoft Academic Search

[fre] Dclin de l'emploi industriel et tertiarisation accrue L'emploi par secteur d'activit entre 1982 et 1990 . Entre 1 982 et 1 990, l'conomie franaise cre prs de 800 000 emplois. Cette progression recouvre, en moyenne par an, des volutions de sens opposs : crations d'emplois dans le tertiaire (+ 240 000), disparitions dans l'industrie (- 64 000), l'agriculture (-

Magda Tomasini; Sylvie Dumartin

1993-01-01

147

Factores socio-econmicos asociados a la percepcin de situacin socioeconmica entre adultos mayores de dos pases latinoamericanos  

PubMed Central

El objetivo principal del artculo es estudiar la asociacin entre la percepcin subjetiva sobre la situacin econmica propia y una serie de medidas objetivas de bienestar socioeconmico fuentes de ingresos, tenencia de vivienda, nivel educativo y transferencias familiares informales de dinero- entre adultos mayores de dos pases Latinoamericanos: Mxico y Costa Rica. Los datos se obtienen de las primeras rondas de dos encuestas sobre envejecimiento: CRELES para Costa Rica y ENASEM para Mxico. La variable dependiente ms importante se obtiene de las respuestas a las pregunta Cmo califica su situacin econmica actual? en Costa Rica y Dira usted que su situacin econmica es? en Mxico. Para ambas encuestas, las respuestas se codificaron en forma binaria; el cdigo 0 representa las categoras Excelente, Muy buena y Buena, y el cdigo 1 representa a las categoras Regular y Mala. Se encontr que el ingreso por jubilacin es un importante determinante de la percepcin de bienestar en ambos pases. En Costa Rica, el ingreso del cnyuge y la tenencia de vivienda son importantes predictores de la percepcin de bienestar, mientras que en Mxico, los ingresos por transferencias estn fuertemente asociados con dicha percepcin. PMID:25360057

Brenes-Camacho, Gilbert

2014-01-01

148

Amorage d'une dcharge dans le vide entre deux electrodes d'argent ou des alliages argent-nickel  

NASA Astrophysics Data System (ADS)

Comparison of the characteristics of an electric are breakdown in vacuum between two silver or silver-nickel alloy electrodes prompted us to study the evolution of the breakdown voltage with electrode separation, with resistance value placed between the anode and the high voltage supply used for the breakdown, and with the effect of conditionning by heating in vacuum. The measurement of the commutation time and delay time, and the observations by a metallographic microscope of the electrodes surfaces after one breakdown, enabled us to evidence the origin of the electric arc for each of the studied materials. La comparaison des caractristiques de l'amorage d'un arc lectrique dans le vide entre deux lectrodes bombes de 8mm de diamtre et de rayon de courbure en surface de 16mm, constitues d'argent ou de son alliage avec le nickel, nous a amen tudier l'volution de la tension d'amorage avec plusieurs paramtres : la distance inter-lectrodes, les valeurs de la rsistance intercale entre la source haute tension servant au claquage et les lectrodes et le conditionnement par chauffage sous vide des lectrodes. La mesure du temps de commutation, du temps de retard et les observations au microscope mtallographique de la surface des lectrodes aprs un amorage donnent des informations sur l'origine de l'arc lectrique concernant chaque matriau tudi.

Zouache, N.; Lefort, A.

1997-03-01

149

High-throughput in planta expression screening identifies a class II ethylene-responsive element binding factor-like protein that regulates plant cell death and non-host resistance.  

PubMed

We performed high-throughput screening using the potato virus X (PVX) system to overexpress Nicotiana benthamiana genes in planta and identify positive regulators of cell death. This screening identified NbCD1, a novel class II ethylene-responsive element binding factor (ERF), as a potent inducer of the hypersensitive response (HR)-like cell death. NbCD1 expression was induced by treatments with INF1 elicitor and a non-host pathogen Pseudomonas cichorii. NbCD1 exhibited transcriptional repressor activity through its EAR motif, and this motif was necessary for NbCD1 to cause cell death. We identified 58 genes that displayed altered transcription following NbCD1 overexpression. NbCD1 overexpression downregulated the expression of HSR203, a negative regulator of hypersensitive death. Conditional expression of NbCD1 in Arabidopsis also caused cell death, indicating that NbCD1 downstream cascades are conserved in dicot plants. To further confirm the role of NbCD1 in defense, we used virus-induced gene silencing to demonstrate that NbCD1 is required for non-host resistance of N. benthamiana to the bacterial pathogen P. cichorii. Our data point to a model of transcriptional regulatory cascades. NbCD1 positively regulates cell death and contributes to non-host resistance, possibly by downregulating the expression of other defense response genes. PMID:16098104

Nasir, Khairun Hisam Bin; Takahashi, Yoshihiro; Ito, Akiko; Saitoh, Hiromasa; Matsumura, Hideo; Kanzaki, Hiroyuki; Shimizu, Takeshi; Ito, Minako; Fujisawa, Shizuko; Sharma, Prakash C; Ohme-Takagi, Masaru; Kamoun, Sophien; Terauchi, Ryohei

2005-08-01

150

In Planta Processing and Glycosylation of a Nematode CLAVATA3/ENDOSPERM SURROUNDING REGION-Like Effector and Its Interaction with a Host CLAVATA2-Like Receptor to Promote Parasitism.  

PubMed

Like other biotrophic plant pathogens, plant-parasitic nematodes secrete effector proteins into host cells to facilitate infection. Effector proteins that mimic plant CLAVATA3/ENDOSPERM SURROUNDING REGION-related (CLE) proteins have been identified in several cyst nematodes, including the potato cyst nematode (PCN); however, the mechanistic details of this cross-kingdom mimicry are poorly understood. Plant CLEs are posttranslationally modified and proteolytically processed to function as bioactive ligands critical to various aspects of plant development. Using ectopic expression coupled with nanoliquid chromatography-tandem mass spectrometry analysis, we show that the in planta mature form of proGrCLE1, a multidomain CLE effector secreted by PCN during infection, is a 12-amino acid arabinosylated glycopeptide (named GrCLE1-1Hyp4,7g) with striking structural similarity to mature plant CLE peptides. This glycopeptide is more resistant to hydrolytic degradation and binds with higher affinity to a CLAVATA2-like receptor (StCLV2) from potato (Solanum tuberosum) than its nonglycosylated forms. We further show that StCLV2 is highly up-regulated at nematode infection sites and that transgenic potatoes with reduced StCLV2 expression are less susceptible to PCN infection, indicating that interference of the CLV2-mediated signaling pathway confers nematode resistance in crop plants. These results strongly suggest that phytonematodes have evolved to utilize host cellular posttranslational modification and processing machinery for the activation of CLE effectors following secretion into plant cells and highlight the significance of arabinosylation in regulating nematode CLE effector activity. Our finding also provides evidence that multidomain CLEs are modified and processed similarly to single-domain CLEs, adding new insight into CLE maturation in plants. PMID:25416475

Chen, Shiyan; Lang, Ping; Chronis, Demosthenis; Zhang, Sheng; De Jong, Walter S; Mitchum, Melissa G; Wang, Xiaohong

2015-01-01

151

In Planta Processing and Glycosylation of a Nematode CLAVATA3/ENDOSPERM SURROUNDING REGION-Like Effector and Its Interaction with a Host CLAVATA2-Like Receptor to Promote Parasitism1[OPEN  

PubMed Central

Like other biotrophic plant pathogens, plant-parasitic nematodes secrete effector proteins into host cells to facilitate infection. Effector proteins that mimic plant CLAVATA3/ENDOSPERM SURROUNDING REGION-related (CLE) proteins have been identified in several cyst nematodes, including the potato cyst nematode (PCN); however, the mechanistic details of this cross-kingdom mimicry are poorly understood. Plant CLEs are posttranslationally modified and proteolytically processed to function as bioactive ligands critical to various aspects of plant development. Using ectopic expression coupled with nanoliquid chromatography-tandem mass spectrometry analysis, we show that the in planta mature form of proGrCLE1, a multidomain CLE effector secreted by PCN during infection, is a 12-amino acid arabinosylated glycopeptide (named GrCLE1-1Hyp4,7g) with striking structural similarity to mature plant CLE peptides. This glycopeptide is more resistant to hydrolytic degradation and binds with higher affinity to a CLAVATA2-like receptor (StCLV2) from potato (Solanum tuberosum) than its nonglycosylated forms. We further show that StCLV2 is highly up-regulated at nematode infection sites and that transgenic potatoes with reduced StCLV2 expression are less susceptible to PCN infection, indicating that interference of the CLV2-mediated signaling pathway confers nematode resistance in crop plants. These results strongly suggest that phytonematodes have evolved to utilize host cellular posttranslational modification and processing machinery for the activation of CLE effectors following secretion into plant cells and highlight the significance of arabinosylation in regulating nematode CLE effector activity. Our finding also provides evidence that multidomain CLEs are modified and processed similarly to single-domain CLEs, adding new insight into CLE maturation in plants. PMID:25416475

Chen, Shiyan; Lang, Ping; Chronis, Demosthenis; Zhang, Sheng; De Jong, Walter S.; Mitchum, Melissa G.

2015-01-01

152

Soil Quality Indicators to Define Land Use in the Area of Native Forest of Entre Ros, Argentina  

NASA Astrophysics Data System (ADS)

The main economic activity in the area of native forest of the province of Entre Ros (Argentina) has long been the agricultural and/or livestock production, especially cattle breeding. In recent years, the proportion of agricultural crops in the rotations, especially that of soybean, has increased, thus leading to an increase in the need for land clearing to incorporate new lands for agricultural use. Most of these lands are considered marginal for agricultural use. In addition rice farming with irrigation is a critical part of the Entre Ros economy. Defining and assessing soil quality indicators (SQI) that show the evolution of the soil with different uses and management systems is a way to contribute to the knowledge of soil quality. The aims of this study were to characterize the current land use and land tenure in the area of native forest of Entre Ros, as well as to identify and select variables sensitive to agricultural and/or livestock use of the most representative soils of this area (indicators of the dynamic quality of the soil) and define the most appropriate land use according to land suitability and behavior of these indicators. We identified the most representative soil subgroups (corresponding to the orders Vertisols, Mollisols and Alfisols) and defined the production systems livestock-agricultural, agricultural-livestock, agricultural without irrigation, and rice crop irrigated with water from groundwater and surface reservoirs. We also determined the physical, physico-chemical, chemical and microbiological variables of the soil, and characterized the quality of the water for irrigation. We selected the SQI using Principal Components Analysis, to form a minimum data set (MDS). The change in the use of the land responded to a favorable economic situation for agriculture that started in the 1990's. The leasing and sharecropping schemes and the incidental contracts have become increasingly important, predominating over the undivided property. We obtained the MDS for twelve combinations of soil subgroups and production systems. The MDS for each of them presented between six and nine SQI. The indicators showed greater variation in the MDS by production system than by unit of land. Total organic carbon content (TOC) and the structural stability index (Is) were included in all the MDS. The rice systems showed high dependence on the quality of the irrigation water. We also found high fragility of some soil subgroups. The results suggest that rotations including pastures in a high proportion should be considered, especially in Alfisols and Vertisols. The native forest is considered as the basis of sustainable production systems for the study area. Thus, the land that has already been cleared or is about to be cleared should consider an agricultural and/or livestock use according to its productive capacity and its limitations.

Wilson, M. G.; Tasi, H. A.; Paz Gonzlez, A.; Daz, E. L.; Sasal, M. C.

2012-04-01

153

Competition entre les phases ferromagnetique metallique et ordre de charges a l'interface de manganites a magnetoresistance colossale  

NASA Astrophysics Data System (ADS)

Dans la these qui suit, l'interaction entre deux manganites a magnetoresistance colossale domines par des phases antagonistes est etudiee a l'interface de bicouches. Un manganite isolant anti-ferromagnetique presentant une phase d'ordre de charges a basse temperature et un manganite metallique domine par les interactions ferromagnetiques. L'objectif est de verifier si l'interaction entre ces deux manganites est susceptible de soit 1) affaiblir la stabilite de l'ordre de charges ou soit 2) de rendre la phase metallique plus resistive afin d'ameliorer les proprietes de magnetoresistance colossale. Deux series de bicouches ont ete preparees par depot par ablation laser pulse et analysees avec une combinaison de plusieurs methodes experimentales telles que la mesure de resistance electrique, la spectroscopie Raman, la mesure d'aimantation et la diffraction des rayons X. Dans la premiere serie de bicouches, la configuration utilisee consiste en une couche tampon ferromagnetique sur laquelle une couche de manganite a ordre de charges est deposee. Il s'est avere que la phase d'ordre de charges n'est pas destabilisee par la phase ferromagnetique metallique dans une couche d'ordre de charges aussi mince que 10 nm. Les mesures de resistance montrent que la phase isolante demeure difficile a rendre metallique sous l'application d'un champ magnetique. La spectroscopie Raman montre egar lement une phase d'ordre de charges tres stable et suggere que les contraintes mecaniques appliquees par la couche tampon sont responsables de cette stabilite, malgre la presence de la phase ferromagnetique a proximite. Dans la deuxieme serie de bicouches, la configuration utilisee consiste en une couche tampon presentant de l'ordre de charges sur laquelle une couche ferromagnetique metallique est deposee. La diminution de l'epaisseur de la couche ferromagnetique metallique se repercute sur une diminution de la temperature de Curie et de la transition metal-isolant. Entre 4 et 5 nm, la transition metal-isolant est supprimee et la bicouche demeure isolante a toutes les temperatures. Dans la bicouche ayant une couche ferromagnetique de 4 nm, la transition metal-isolant est retrouvee sous l'application d'un champ magnetique de 1.5 T et une magnetoresistance de 50% est obtenue a 75K sous l'application d'un champ magnetique de 0.5 T. Un changement dans le champ magnetique necessaire a l'aimantation de la couche d'ordre de charges est egalement mesure, suggerant que la couche ferromagnetique induit des domaines ferromagnetiques dans la couche tampon. Ces resultats sont expliques par l'interaction mecanique dominant l'interface et favorisant la localisation des charges. L'anisotropie de la contrainte mecanique semble jouer un role supplementaire comparativement aux contraintes procurees par un substrat cubique. La rotation des octaedres ou la distorsion de Jahn-Teller, deux distorsions locales, pourraient contribuer a la tendance a localiser les charges. De plus, la phase isolante mesuree dans le Nd2/3Sr 1/3O3, normalement metallique, demeure plus sensible au champ magnetique que la phase isolante induite dans ce meme materiau par un substrat cubique isolant. La domination des contraintes mecaniques sur les influences ferromagnetiques suggere que cette influence soit le vecteur principal pour le controle de la separation de phases electroniques des manganites.

Laverdiere, Jonathan

154

Magnetotellurics applied to the study of the Guaran aquifer in Entre Ros Province, N-E Argentina  

NASA Astrophysics Data System (ADS)

The South American Guaran Aquifer System covers the entire Parana basin and part of the Chaco-Parana basin. This system is one of the most important groundwater reservoirs; it is shared by four neighboring countries covering an area larger than one million square kilometers. The geological units closely related to the Guaran Aquifer are the Piramboia and Botucatu Formations that consist of Triassic-Jurassic aeolian, fluvial and lacustrine sandstones, and the Serra Geral basalts with clastic intercalations. Serra Geral, an effusive Cretaceous complex, covers the sandstones and provides a high degree of confinement to the system. This paper presents the interpretation of magnetotelluric (MT) data collected during 2007-2008 in Entre Ros Province, Argentina. These data, recorded in three profiles, mainly provide the depth to the crystalline basement, determinant for the presence of aquifer-related sediments. Models showed that the discrimination of the basalts strongly depends on local electrical characteristics. Model information is quite consistent with the information from oil and thermal wells located close to the profiles.

Favetto, Alicia; Curcio, Ana; Pomposiello, Cristina

2011-07-01

155

TILBESHAR, AU CARREFOUR D'ECHANGES ENTRE LA VALLEE DE L'EUPHRATE ET LA COTE MEDITERRANEENNE A L'AGE DU BRONZE  

E-print Network

: With a maximum area of 56 hectares, Tilbeshar is a major city of Southeast Anatolia in the Bronze Age, Bronze Age, exchanges, Euphrates, Mediterranean sea, North Mesopotamia halshs-00718902,version1-19Jul2012TILBESHAR, AU CARREFOUR D'ECHANGES ENTRE LA VALLEE DE L'EUPHRATE ET LA COTE MEDITERRANEENNE A L'AGE

Paris-Sud XI, Université de

156

Nunca deje alimentos en la zona peligrosa (temperaturas entre 40 F) por ms de 2 horas. Las bacterias se multiplican rpidamente  

E-print Network

Nunca deje alimentos en la zona peligrosa (temperaturas entre 40° F y 140° F) por más de 2 horas. Las bacterias se multiplican rápidamente en los alimentos que están en estas temperaturas. Las temperaturas apropiadas en el refrigerador y el congelador ayudan a conservar los alimentos en buen estado y

157

Plantae: Fossil Record and First Appearances  

NSDL National Science Digital Library

This University of California Berkeley Museum of Paleontology site provides an interactive geologic timescale that illustrates the temporal distribution of several important plant groups. First appearances of major plant groups are plotted on a colorful timescale and each group is linked to references, text, images, and further information. Key Cretaceous plant groups featured include Anthocerotophyta, Anthophyta and Gnetales. The site might be a useful resource for constructing introductory level lectures concerned with paleobotany and paleoecology of the Cretaceous Period.

Brian, Speer; Paleontology, University O.

158

In planta transformation of Arabidopsis thaliana  

Microsoft Academic Search

Transformants of Arabidopsis thaliana can be generated without using tissue culture techniques by cutting primary and secondary inflorescence shoots at their bases and inoculating the wound sites with Agrobacterium tumefaciens suspensions. After three successive inoculations, treated plants are grown to maturity, harvested and the progeny screened for transformants on a selective medium. We have investigated the reproducibility and the overall

Vesna Katavic; George W. Haughn; Darwin Reed; Marilyn Martin; Ljerka Kunst

1994-01-01

159

Linfluence du degr daversion lingalit du dcideur sur sa perception des ingalits intragroupes et intergroupes : une application de lalpha dcomposition aux salaires de la France entre 1995 et 2005  

Microsoft Academic Search

Nous proposons dans cette recherche de mettre en avant le rle capital jou par les prfrences du dcideur sur sa perception des ingalits intragroupes et intergroupes. Une application ralise partir des salaires observs en France entre 1995 et 2005 rvle notamment de grands carts de valeurs entre les diffrents indicateurs choisis pour valuer lvolution des disparits salariales sur la

Pauline MORNET; Franoise SEYTE; Michel TERRAZA

2012-01-01

160

Les formes organisationnelles mdiatises par les TIC tirailles entre logique d'autonomie et logique de contrle : une dmocratie toujours limite  

E-print Network

Les formes organisationnelles médiatisées par les TIC tiraillées entre logique d'autonomie et'organisation médiatisées par les TIC à travers l'exemple des communautés virtuelles entourant Internet, et plus structure. halshs-00421613,version1-2Oct2009 Manuscrit auteur, publié dans "5èmes Doctoriales du GDR TIC et

Paris-Sud XI, Université de

161

C. R. Acad. Sc. Paris, t. 299, Srie II, n 8, 1984 399 SIGNAUX ET SYSTMES. --Estimation du retard entre signaux de mme forme.  

E-print Network

'un facteur /N le rapport signal à bruit (S/B) après N sommations. Toute erreur de synchronisation crée un synchronisation la plus précise possible : on est en présence d'un problème d'estimation du temps de retard entre filtrage au signal pour avoir un maximum aigu de cette fonction ([5]-[6]) ; -- celles enfin estimant le

Jesus, Sérgio M.

162

FINEZ Jean et COMET Catherine (2011), Solidarits patronales et formation des interlocks entre les principaux administrateurs du CAC40 , Terrains & Travaux, n 19,  

E-print Network

1 FINEZ Jean et COMET Catherine (2011), « Solidarités patronales et formation des interlocks entre Villeneuve d'Ascq Cedex Courriel : jean.finez@ed.univ-lille1.fr Tél. : 03 20 33 62 99 Catherine Comet Maître 59655 Villeneuve d'Ascq Cedex Courriel : catherine.comet@univ-lille1.fr Tél. : 03 20 43 46 87

Boyer, Edmond

163

JOURNAL DE PHBIQUE Colloque C4, supplment au no 10, Tome 36, Octobre 1975,pageC4-403 COMPARAISON ENTRE LES MCANISMES DE CORROSION  

E-print Network

ENTRE LES M?CANISMES DE CORROSION ET DE FRAGILISATION INTERGRANULAIRES DES M?TAUX PAR LES M?TAUX Orsay, France Résumé. -11existe peu de données relatives aux mécanismes de corrosion et de fragilisation intergranulaires (corrosion, pénétration, fragilisation) sont induits par un même mécanisme initial : l

Paris-Sud XI, Université de

164

GUYOT S., 2003, Les conflits environnementaux St Lucia (Afrique du Sud), entre protection et exclusion , Annales de Gographie, n634, pp 608-627, Armand Colin.  

E-print Network

and post-apartheid South Africa, at local and national levels, between the will of Afrikaners to segregate'apartheid et post-apartheid, aux niveaux local et national, entre une volonté d'individualisation d'un groupe d contraignantes ou encore des Noirs occuper illégalement une forêt d'Etat. Key words: South Africa, St Lucia

Paris-Sud XI, Université de

165

Absence de corrlation entre la masse et l'activit enzymatique de deux enzymes majori-taires (lipase et trypsine) de diffrents sucs pancratiques humains. Incidence sur les  

E-print Network

Absence de corrélation entre la masse et l'activité enzymatique de deux enzymes majori- taires, Grossman et Ivy (1 ) le phénomène d'adapta- tion des enzymes pancréatiques au régime a été clairement méthodologie pré- cise et jusqu'à présent les variations des enzymes pancréatiques sous l'influence de divers

Paris-Sud XI, Université de

166

LE CONTROLE CIVIL ET LE POUVOIR EXECUTIFAU JAPON Essai sur les rapports entre civils et militaires dans le Japon d'aprs guerre  

E-print Network

1 LE « CONTROLE CIVIL » ET LE POUVOIR EXECUTIFAU JAPON Essai sur les rapports entre civils et journalistes : « je suis un béotien en matière de sécurité. C'est l'essence même du contrôle civil ». Gaffe ou. Ichikawa n'avait pas pris la mesure de l'importance du principe de contrôle ou de prépondérance civile. Le

Paris-Sud XI, Université de

167

La politique trangre entre l'Elyse et Matignon In: Politique trangre N3 -1989 -54e anne pp. 487-503.  

E-print Network

réelle connivence. Elle a abouti à partager la politique étrangère en trois sphères d'influence qui à choisir entre la résignation et la démission. A moins qu'intervienne d'ici là un aménagement de la, reléguée au rang d'un accident de l'histoire : dix-huit mois après la victoire de François Mitterrand à l

Boyer, Edmond

168

N a t h a l i e F o u r n i e r affinits et "discordances stylistiques entre  

E-print Network

N a t h a l i e F o u r n i e r affinités et "discordances stylistiques entre Les Désordres de l'amour tombée dans un autre esprit que le mien. {PC, p. 367) La lecture des Désordres de l'amour2 en fait douter Termes y avoue à son mari son amour pour un autre. On comprend donc la surprise et le dépit affectés par

Boyer, Edmond

169

PRODUCCIN DE PLANTAS EN VIVEROS FORESTALES Produccin de plantas grandes usando  

E-print Network

por la producción híbrida o mixta. La misma consiste en cul- tivar plantines en contenedores de prácticas cul- turales habituales de ese tipo de producción. Desarro- llados a principios de la década de

170

La efectividad de la educacion a distancia como metodologia en la desarrollo de destrezas de pensamiento (Effectiveness of Distance Education as a Methodology for Developing Thinking Skills).  

ERIC Educational Resources Information Center

Presents steps taken in designing, justifying, and implementing an experimental study designed to investigate the effectiveness of distance education as a methodology for developing thinking skills. A discussion reviews major findings of the study by comparing student experiences from multimedia distance education and student experiences from

Melendez Alicea, Juan

1992-01-01

171

Literacia Econmica entre alunos Universitrios  

Microsoft Academic Search

It is widely recognized the important role played by human capital, knowledge and innovation for the establishment of the basic conditions for permanent economic growth. On particular aspect of this general issue interests us in particular; the level of economic literacy among young students who arrive at the university to get a degree not only in economic sciences (Economics, Management,

Jos Manuel Madeira Belbute; Miguel Rocha de Sousa

2004-01-01

172

Aceptabilidad del diagnstico rpido casero para HIV entre hombres gay y otros hombres que tienen sexo con hombres (G&HSH) de la Ciudad de Buenos Aires  

PubMed Central

Resumen El uso del diagnstico rpido para HIV en Argentina, as como otros pases de Latinoamrica, ha sido limitado hasta el momento. Este trabajo reporta los resultados provenientes de un estudio cualitativo realizado entre hombres gays y otros hombres que tienen sexo con hombres (G&HSH) de la Ciudad de Buenos Aires, Argentina. El objetivo principal del mismo fue conocer las ventajas y desventajas que los hombres G&HSH perciben en relacin al diagnstico rpido casero para HIV. Se realizaron ocho grupos focales con 73 participantes en los cuales se discuti acerca de las ventajas y desventajas del uso de los diagnsticos rpidos. Las respuestas fueron codificadas utilizando un programa para anlisis de datos cualitativos (NVivo) y analizadas temticamente. Los participantes describieron numerosas ventajas sobre el uso del diagnstico rpido casero, aunque algunos reportaron importantes preocupaciones dentro de las cuales se destaca la posibilidad de impulsos suicidas si alguien recibe un resultado positivo estando solo. En trminos generales se observ una gran aceptabilidad para el uso del diagnstico rpido si el mismo es realizado por personal de salud en lugares acondicionados para este fin. PMID:25284951

Baln, Ivn C.; Carballo-Diguez, Alex; Marone, Rubn O.; Pando, Mara A.; Barreda, Victoria; vila, Mara M.

2011-01-01

173

Estudo retrospectivo da associao entre transtorno de pnico em adultos e transtorno de ansiedade na infncia Retrospective study of the association between adulthood panic disorder and childhood anxiety disorders  

Microsoft Academic Search

Objetivo: A etiologia do transtorno do pnico (TP) provavelmente multifatorial, incluindo fatores genticos, biolgicos, cognitivo-comportamentais e psicossociais que contribuem para o aparecimento de sintomas de ansiedade, muitas vezes durante a infncia. O objetivo deste estudo foi avaliar a relao entre histria de trans- tornos de ansiedade na infncia e transtorno do pnico na vida adulta. Mtodos: Foram avaliados retrospectivamente

Gisele Gus Manfro; Luciano Isolan; Carolina Blaya; Lissandra Santos; Maura Silva

174

W. CHANDLER ROBERTS. 2014 On an analogy between the conductivity for heat and the induction-balance effect of copper-tin alloys (Sur la concordance entre l'effet  

E-print Network

393 W. CHANDLER ROBERTS. 2014 On an analogy between the conductivity for heat and the induction-balance effect of copper-tin alloys (Sur la concordance entre l'effet de la balance d'induction sur les alliages courbe des inductions manifestées dans la balance de Hughes par les alliages de cuivre et d'étain, on re

Paris-Sud XI, Université de

175

Odette Hall -50, rue St. Joseph 2me, Toronto, Ontario M5S 1J4 http://www.french.utoronto.ca/EntreNous Tlphone: 416.926.2302 -Fax: 416.926.2328 Courrier lectronique: french.secretary@utoronto.ca  

E-print Network

://www.french.utoronto.ca/EntreNous Téléphone: 416.926.2302 - Fax: 416.926.2328 Courrier électronique: french.secretary@utoronto.ca 1 ENTRE NOUS://www.french.utoronto.ca/EntreNous Téléphone: 416.926.2302 - Fax: 416.926.2328 Courrier électronique: french.secretary@utoronto.ca 2 ENTRE NOUS fonctions administratives pour deux années de plus. Nous sommes heureux de voir leur talent ainsi reconnu

Sokolowski, Marla

176

INFLUENCE OF NATIVE VEGETATION STRIPS ON PLANTATIONS OF Eucalyptus cloeziana ON POPULATION OF Oxydia vesulia (LEPIDOPTERA: GEOMETRIDAE)  

Microsoft Academic Search

RESUMO - O eucalipto a espcie florestal mais plantada no Brasil, e por pertencer famlia Myrtaceae sofre ataques de insetos que migram de hospedeiros nativos dessa planta, entre os quais Oxydia vesulia (Lepidoptera: Geometridae), espcie responsvel por danos significativos a plantas desse grupo, em vrias regies do Pas. O estabelecimento e a preservao de reservas nativas tm sido

Germi Porto Santos; Teresinha Vinha Zanuncio; Eloisio Vinha; Jos Cola Zanuncio

2002-01-01

177

Etude des phenomenes chimiques au contact entre le bloc cathodique et la barre collectrice d'une cellule d'electrolyse d'aluminium  

NASA Astrophysics Data System (ADS)

La production d'aluminium est une industrie importante au Qubec. Les proprits de ce mtal le vouent de multiples usages prsents et futurs dans le cadre d'une conomie moderne durable. Toutefois, le procd Hall-Hroult est trs nergivore et des progrs demeurent donc ncessaires pour en diminuer les cots financiers et environnementaux. Parmi les amliorations envisageables de la cellule d'lectrolyse se trouve le contact entre la cathode et la barre collectrice, qui doit offrir une faible rsistivit au passage du courant lectrique. En cours d'opration de la cellule, ce contact a tendance se dgrader, gnrant des pertes nergtiques significatives. Les causes de cette dgradation, pouvant provenir de phnomnes chimiques, thermiques, mcaniques et/ou lectriques, demeurent mal comprises. Le but du prsent projet tait donc d'tudier les phnomnes chimiques se produisant au contact bloc-barre de la cellule d'lectrolyse Hall-Hroult. En premier lieu, un aspect crucial considrer est la pntration du bain lectrolytique dans la cathode, car des composs de bain atteignent ventuellement la barre collectrice et peuvent y ragir. A cet effet, une mthode novatrice a t dveloppe afin d'tudier les cathodes et la pntration du bain dans celles-ci l'aide de la microtomographie rayons X. Cette mthode rapide et efficace s'est avre fort utile dans le projet et a un potentiel important pour l'tude future des cathodes et des phnomnes qui s'y produisent. Ensuite, une cellule d'lectrolyse rectangulaire petite chelle a t dveloppe. Plusieurs phnomnes observs 'en industrie sur des autopsies de cellules post-opration et rapports dans la littrature ont t reproduis avec succs l'aide de cette cellule exprimentale. Puis, des tests sans lectrolyse, ciblant l'effet du bain lectrolytique sur l'acier, ont aussi t conus et complts afin de sgrger l'influence des diffrents paramtres en jeu. L'analyse des rsultats de l'ensemble de ces tests a permis de constater diffrents phnomnes au contact bloc-barre, dont la prsence systmatique de NaF et, surtout, de ?-Al 2O3. Outre la carburation invitable de la barre collectrice, la formation d'une couche Fe-Al a aussi t observe, favorise par une pntration rapide du bain lectrolytique dans la cathode ainsi que par une composition de bain acide en surface de la barre. Cette couche comportait par ailleurs des cristaux de ?-Al 2O3 pouvant nuire sa conductivit lectrique. Ensuite, des ratios de bain entre 2.5 et 4.9, une mince couche contenant les lments Al et N peut se former en surface de la barre. Pour un bain trs basique (> 6.0), c'est plutt une couche Na 2O qui a t observe. En conditions d'lectrolyse mais sans une pntration rapide du bain dans la cathode, du Na a pu carrment pntrer dans la barre collectrice, prfrentiellement avec le carbone. De plus, de la corrosion ainsi que des couches de fer et d'oxyde de fer peuvent se former sur la barre et potentiellement dgrader la qualit du contact lectrique. Pour la suite des travaux, des mesures de rsistivit ainsi que l'analyse des chantillons industriels permettraient d'valuer l'impact de ces phnomnes sur la qualit du contact. Mots-cls : lectrolyse, aluminium, Hall-Hroult, interface barre-cathode, bain lectrolytique.

Lebeuf, Martin

178

Campus de So Jos do Rio Preto- UNESP  

E-print Network

Relao de custo/benefcio na interao entre a aranha Peucetia flava (Oxyopidae) e a planta Rhynchanthera dichotoma (Melastomataceae) Dissertao apresentada para obteno do ttulo de Mestre em Cincias Biolgicas, rea de Ecologia junto ao Programa de Ps-

Jos Cesar De Morais Filho; Letras E Cincias Exatas Da; Orientador Prof; Dr. Gustavo; Q. Romero; So Jos; Rio Preto; Ii Morais Filho; Jos Cesar De; Orientador Gustavo; Quevedo Romero; Estadual Paulista; Letras E Cincias Exatas; Gustavo Quevedo

2009-01-01

179

Entre l'entusiasme i l'obstruccionisme: la realitat de l'escola valenciana durant la Segona Repblica (1931-1939) = Between Enthusiasm and obstructionism: The realities of the valencian School during the Second Republic (1931-1939)  

Microsoft Academic Search

Una mirada crtica respecte del debat teric i de les prctiques escolars a les comarques\\u000avalencianes al llarg de la Segona Repblica ens revela que els enfrontaments constants\\u000ade carcter poltic que tingueren lloc entre els principals partits d'aquest mbit\\u000aterritorial condicionaren, en bona mesura, la realitat de les poltiques educatives republicanes\\u000aprovinents dels organismes estatals. Els plantejaments oposats del

Mara del Carmen Agull Daz

2008-01-01

180

PS-GRADUAO EM BIOLOGIA DE FUNGOS, ALGAS E PLANTAS  

E-print Network

identificação, sendo Carteira de identidade e CPF (original e fotocópia, ou fotocópia autenticada em cartório de Botânica Campus Universitário ­ Trindade - Florianópolis-SC-Brasil Cx. Postal 476 - CEP 88040

Floeter, Sergio Ricardo

181

In Planta mutagenesis determines the functional regions of puroindoline proteins.  

Technology Transfer Automated Retrieval System (TEKTRAN)

PINA and PINB functionally comprise the wheat (Triticum aestivum L.) Ha locus which controls grain texture and many wheat end-use properties. PINs in their functional forms impart soft texture and a mutation in either PIN is found in all hard wheats. Studies of the PINs mode of action is limited ...

182

Alpinia purpurata Buscando una planta libre de cochinillas  

E-print Network

especies de cochinilla en las inflorescencias muestreadas en la zona de Siquirres y Guápiles: Dysmicoccus invierno de 0,51 brácteas infestadas por inflo- rescencia y 0,36 para la época de verano. 4,4% de las

Ginzel, Matthew

183

Short communication Phylogeny of Calvin cycle enzymes supports Plantae monophyly  

E-print Network

, it is well known that some CC enzymes in land plants and red algae have a non-cyanobacterial origin (Martin and glaucophyte algae. In green algae (and land plants) the RuBisCO large subunit is encoded in the plastid gen phylogenetic analyses suggest that land plants (Martin and Schnarrenberger, 1997) and red algae acquired

Bhattacharya, Debashish

184

Planta (1985)165:548-553 Planta9 Springer-Verlag 1985 Porphyranereocystis: A dual-daylength seaweed  

E-print Network

Nereocystis luet- keana (Mertens) Postels et Ruprecht, are released in culture only in response to a short, filamentous plant. The host of this host-epiphyte species pair, the giant diploid sporophyte of the kelp N Sound region (Fallis 1915; Sheldon 1915; Hurd 1915; Rigg 1917; Duncan 1973) and in even deeper water

California at Santa Cruz, University of

185

Competition entre supraconductivite et magnetisme au voisinage de la transition de Mott dans le conducteur organique quasi-bidimensionnel k-(BEDT-TTF)2copper[N(CN)2]bromine  

NASA Astrophysics Data System (ADS)

Les conducteurs organiques quasi-bidimensionnels kappa-ET2X presentent d'importantes similitudes avec les SCHT telles qu'une phase isolant de Mott, un regime de pseudogap et un etat supraconducteur. L'etude de leurs proprietes apparait donc complementaire. Parmi les interrogations persistantes concernant la physique de ces systemes, l'origine du (ou des) processus exotique d'appariement, responsable de la supraconductivite est le sujet suscitant l'interet le plus marque dans la communaute. L'hypothese d'un mecanisme lie a la proximite d'un etat antiferromagnetique est privilegiee. Une etape importante dans la resolution de cette problematique est l'identification de la symetrie du parametre d'ordre. D'apres de nombreux travaux sur les systemes fortement correles, la sonde ultrasonore, de par sa sensibilite aux excitations de quasiparticule a basse temperature, est consideree comme particulierement adaptee a l'etude de cette propriete. Cependant, son emploi necessite l'utilisation d'un compose metallique a basse temperature et completement supraconducteur. Le compose metallique organique kappa-ET 2Cu[N(CN)2]Br presente toutes les caracteristiques necessaires a l'etude de cette propriete. En effet, il est situe loin de la transition du premier ordre de Mott et est completement supraconducteur. De facon surprenante, ce systeme semble se coupler fortement avec le reseau ce qui augmente significativement la sensibilite de cette sonde aux proprietes du gaz electronique. Cependant, des difficultes techniques importantes, liees a la nature intrinseque de ce materiau, doivent etre surmontees pour proceder a des mesures suivant differentes polarisations. La presente etude a profondement modifie notre comprehension de ce systeme. En effet, ces mesures ont permis de constater que le kappa-ET2Cu[N(CN)2]Br est un compose qui est situe en bordure de la zone de coexistence entre la supraconductivite et le magnetisme, ce qui constitue un resultat totalement inattendu. De plus, la variation judicieuse du cycle thermique s'est averee etre equivalente a une modification de la pression chimique. Cette derniere est modifiee par l'intermediaire d'une relaxation structurale autour de 85 K appelee la transition de verre d'ethylenes. Cela nous a permis de suivre l'evolution de cette coexistence en s'approchant de la transition de premier ordre, et ainsi de statuer sur la competition entre la supraconductivite et le magnetisme ainsi que sur l'existence d'une separation de phase d'ordre macroscopique. De plus, nous avons observe une anisotropie similaire sur les mesures de vitesse ultrasonore entre le regime de pseudogap et la supraconductivite. Ce resultat tend a confirmer l'existence d'une physique commune entre le regime de pseudogap et l'etat supraconducteur. Le regime de pseudogap, encore meconnu a ce jour, est probablement relie a des fluctuations antiferromagnetiques, dont l'origine pourrait etre un emboitement de la surface de Fermi quasi-unidimensionnelle de ce compose, ou bien relie a la proximite de la physique de Mott. Enfin, l'analyse de la symetrie du parametre d'ordre supraconducteur, qui est probablement de type s+d, tend a demontrer que les processus de couplage interplan sont d'une importance cruciale. L'approche theorique de Hubbard purement 2D dans le plan conducteur semble donc insuffisante pour la recherche du mecanisme d'appariement.

Fournier, David

186

Encuentro cercano entre agricultura y napa  

E-print Network

. Inundación Lluvia Escorrentía Evaporación Salinización Erosión Mercau 2011 Maximizar Transpiración y su conversión en grano, forraje & rastrojo ¿Por qué? Agua ?til Inicio & Fin Rio Nuevo -2- #12;0 30 60 90 120 150 20% > 1095 mm Techo 1) Variabilidad esperable de las lluvias Pronóstico Niño/Niña (océano) Viendo la

Nacional de San Luis, Universidad

187

Evolutiondulittoral entreIwiketl'ledeTidra  

E-print Network

'eau watercourse lac lake océan ocean sédiments sediment lac lake banc d'Arguin océan ocean sédiments sediment sédiments sediment dune dune banc d'Arguin banc d'Arguin océan ocean ©R.Certain ©hellio-vaningen © En Haut exposed and formed a barrier that separated a lake from the ocean.The climate was more humid. Rivers

188

DIMED 86: Discurso dos Media e Ensino a Distancia = Discours des Media et Enseignement a Distance = Media Speech and Distance Teaching. Papers Presented at a Seminar (21st, Algarve, Portugal, March 10-15, 1986).  

ERIC Educational Resources Information Center

Presentations at this seminar on distance education focused on the different types of speech in multimedia presentations which contribute to the elaboration (simulated or substituted) of a situation involving different relationships. In addition to opening and closing remarks by Marcel de Greve and a final report by the Scientific Committee of

Coelho, Maria Eduarda Leal

189

An in planta technique for cis-/trans-stereochemical analysis of jasmonoyl isoleucine.  

PubMed

A novel technique for determining the cis-/trans-stereochemistry of jasmonoyl-isoleucine by coupling its alcoholic derivatives by sodium borohydride with high performance liquid chromatography-tandem mass spectrometry is described. Resolving cis- and trans-stereochemistry of the jasmonates in Achyranthes plants exposed to airborne (exogenous) trans-d(2)MeJA was demonstrated as an example. This novel application firmly establishes for the first time that trans-d(2)MeJA is converted exclusively into trans-JA-Ile in Achyranthes leaves, whereas the subsequent de novo biosynthesized JA-Ile possesses cis-stereochemistry. The method is simple, reproducible and could be employed for in vivo cis-/trans-stereochemistry analysis of jasmonates in plants. PMID:20188439

Tamogami, Shigeru; Agrawal, Ganesh Kumar; Rakwal, Randeep

2010-07-15

190

Chemical compounds effective against the citrus huanglongbing bacterium 'Candidatus Liberibacter asiaticus' in planta  

Technology Transfer Automated Retrieval System (TEKTRAN)

Citrus huanglongbing (HLB) is one of the most destructive diseases of citrus worldwide, and is threatening the survival of the Floridian citrus industry. Currently, there is no established cure for this century-old and emerging disease. The new antibiotic combination of penicillin and streptomycin (...

191

Inhibition of Fungal and Bacterial Plant Pathogens In Vitro and In Planta with Ultrashort Cationic Lipopeptides  

Microsoft Academic Search

Plant diseases constitute an emerging threat to global food security. Many of the currently available antimicrobial agents for agriculture are highly toxic and nonbiodegradable and cause extended environ- mental pollution. Moreover, an increasing number of phytopathogens develop resistance to them. Re- cently, we have reported on a new family of ultrashort antimicrobial lipopeptides which are composed of only four amino

Arik Makovitzki; Ada Viterbo; Yariv Brotman; Ilan Chet; Yechiel Shai

2007-01-01

192

CONTROL DEL CRECIMIENTO DE MICROORGANISMOS FILAMENTOSOS EN UNA PLANTA DE TRATAMIENTO DE AGUAS RESIDUALES INDUSTRIALES  

Microsoft Academic Search

Main filamentous microorganisms have been identified in effluents of sewage from three food industries, which lay on Toluca-Lerma industry zone. This sewage is sent to an industrial company to be treated, its activated sludge process has been affected by filamentous microor- ganisms identified at the entrance and flow circulation during treatment. In effluents of sewage, the main filamentous microorganisms are:

Vctor F. PACHECO SALAZAR; Bertha JUREGUI RODRGUEZ; Thelma B. PAVN; Graciela V. MEJA PEDRERO

193

Ecologa y Evolucin dE intEraccionEs planta-animal  

E-print Network

of Charles Darwin Online (http:/darwin-online.org.uk/) Fotografía interacción. Bomarea salsilla nacimiento de chArles dArwin. w w w. u n i v e r s i t a r i a . c l ImprESO EN CHILE / prINtED IN CHILE 577,5 x 27 cm. -­ (Bicentenario Charles Darwin) Incluye glosario e índice de términos. Bibliografía: p.343

Traveset, Anna

194

Planta (1995)196:674-682 P l m a t ~ 9 Springer-Verlag1995  

E-print Network

/Accepted:8 November 1994 Abstract. The radiotracer 13N was used to undertake compartmental analyses for NO3 or hydrogen peroxide made it possible to distin- guish the metabolic (cytoplasmic) phase from the remain- ing and experiments with the stable isotopic tracer 15N (Rygiewicz et al. 1984a, b; Mar- schner et al. 1991; Flaig

Kronzucker, Herbert J.

195

Carotenoid In Planta Development, Storage, and Bioaccessibility: A Comprehensive Approach to Nutrient Analysis  

E-print Network

-specific characteristics of the food which act as barriers to nutrient release. Cell size, cell wall, and chromoplast (the carotenoid storage organelle) characteristics were observed in nine fruits and vegetables using light and transmission electron microscopy. Watermelon...

Jeffery, Jennifer L.

2010-01-14

196

In planta changes in protein phosphorylation induced by the plant hormone abscisic acid  

PubMed Central

Abscisic acid (ABA) is a hormone that controls seed dormancy and germination as well as the overall plant response to important environmental stresses such as drought. Recent studies have demonstrated that the ABA-bound receptor binds to and inhibits a class of protein phosphatases. To identify more broadly the phosphoproteins affected by this hormone in vivo, we used 14N/15N metabolic labeling to perform a quantitative untargeted mass spectrometric analysis of the Arabidopsis thaliana phosphoproteome following ABA treatment. We found that 50 different phosphopeptides had their phosphorylation state significantly altered by ABA over a treatment period lasting 530 min. Among these changes were increases in phosphorylation of subfamily 2 SNF1-related kinases and ABA-responsive basic leucine zipper transcription factors implicated in ABA signaling by previous in vitro studies. Furthermore, four members of the aquaporin family showed decreased phosphorylation at a carboxy-terminal serine which is predicted to cause closure of the water-transporting aquaporin gate, consistent with ABA's role in ameliorating the effect of drought. Finally, more than 20 proteins not previously known to be involved with ABA were found to have significantly altered phosphorylation levels. Many of these changes are phosphorylation decreases, indicating that an expanded model of ABA signaling, beyond simple phosphatase inhibition, may be necessary. This quantitative proteomics dataset provides a more comprehensive, albeit incomplete, view both of the protein targets whose biochemical activities are likely to be controlled by ABA and of the nature of the emerging phosphorylation and dephosphorylation cascades triggered by this hormone. PMID:20733066

Kline, Kelli G.; Barrett-Wilt, Gregory A.; Sussman, Michael R.

2010-01-01

197

IN PLANTA INTERACTIONS OF THREE PLUM POX POTYVIRUS STRAINS WITHIN CULTIVAR LOVELL PEACH SEEDLINGS  

Technology Transfer Automated Retrieval System (TEKTRAN)

Plum pox potyvirus (PPV) exists as several distinct strains: Dideron (D), Marcus (M), El Amar (EA), and Cherry (C). The M strain is considered the most easily aphid transmissible and epidemic form in peach. The D strain is the oldest recognized strain, most widely distributed worldwide, and the on...

198

Planta (2006) DOI 10.1007/s00425-006-0264-6  

E-print Network

, in plants organ shape is largely a result of coordinated cellular growth (cell divisions and cell elon shape regulation. In plants, the frequency of cell divi- sions, the orientation of cell division planes. petal development to better understand the molecular mechanisms through which cellular growth and organ

Franks, Robert

199

Chrysanthemyl diphosphate synthase operates in planta as a bifunctional enzyme with chrysanthemol synthase activity.  

PubMed

Chrysanthemyl diphosphate synthase (CDS) is the first pathway-specific enzyme in the biosynthesis of pyrethrins, the most widely used plant-derived pesticide. CDS catalyzes c1'-2-3 cyclopropanation reactions of two molecules of dimethylallyl diphosphate (DMAPP) to yield chrysanthemyl diphosphate (CPP). Three proteins are known to catalyze this cyclopropanation reaction of terpene precursors. Two of them, phytoene and squalene synthase, are bifunctional enzymes with both prenyltransferase and terpene synthase activity. CDS, the other member, has been reported to perform only the prenyltransferase step. Here we show that the NDXXD catalytic motif of CDS, under the lower substrate conditions prevalent in plants, also catalyzes the next step, converting CPP into chrysanthemol by hydrolyzing the diphosphate moiety. The enzymatic hydrolysis reaction followed conventional Michaelis-Menten kinetics, with a Km value for CPP of 196 ?m. For the chrysanthemol synthase activity, DMAPP competed with CPP as substrate. The DMAPP concentration required for half-maximal activity to produce chrysanthemol was ?100 ?m, and significant substrate inhibition was observed at elevated DMAPP concentrations. The N-terminal peptide of CDS was identified as a plastid-targeting peptide. Transgenic tobacco plants overexpressing CDS emitted chrysanthemol at a rate of 0.12-0.16 ?g h(-1) g(-1) fresh weight. We propose that CDS should be renamed a chrysanthemol synthase utilizing DMAPP as substrate. PMID:25378387

Yang, Ting; Gao, Liping; Hu, Hao; Stoopen, Geert; Wang, Caiyun; Jongsma, Maarten A

2014-12-26

200

IN PLANTA INTERACTIONS OF FUSARIUM VERTICILLIOIDES WITH CORN AND MECHANISMS OF FUMONISIN PYHTOTOXICITY.  

Technology Transfer Automated Retrieval System (TEKTRAN)

Fusarium verticilliodes, the causative agent of ear rot in corn, can produce the mycotoxin fumonisin B1 (FB1). FB1 inhibits a key eukaryotic enzyme necessary for sphingolipid metabolism, ceramide synthase. Such inhibition causes a number of species-specific animal diseases and may contribute to ca...

201

Nitrogen controls in planta expression of Cladosporium fulvum Avr9 but no other effector genes  

Microsoft Academic Search

During growth on its host tomato, the apoplast-colonizing fungal pathogen Cladosporium fulvum secretes several effector proteins. The expression of the Avr9 gene encoding one of these effector proteins has previously been shown to be strongly induced in vitro during nitrogen deprivation. This led to the hypothesis that expression of additional effector genes in C. fulvum could be triggered by nitrogen

BART P. H. J. THOMMA; MELVIN D. BOLTON; PIERRE-HENRI CLERGEOT; Wit de P. J. G. M

2006-01-01

202

Impact of atmospheric deposition on the headworks of a wastewater treatment plant--a case study.  

PubMed

Specialized sampling equipment and ultra-clean analytical methodology were employed to quantify the concentrations or fluxes of mercury (Hg), cadmium (Cd) and polychlorinated biphenyl (PCBs) in ambient air, precipitation, runoff, sanitary sewer, and wastewater treatment plant (WWTP) influent. The relationship between the atmospheric deposition and runoff on controlled surfaces were explored for the three pollutants. The impact of the atmospheric deposition and runoff to the headwork loading of the WWTP were investigated. Atmospheric deposition was found to be the primary source of the mass of Cd, Hg, and PCBs in runoff from the controlled surfaces. Neither atmospheric deposition nor the runoff was the main sources of the three pollutants to the Detroit Wastewater Treatment Plant (WWTP). Wet weather flow contributes the main portion of the Cd, Hg, and PCBs loading to the WWTP. PMID:11379135

Atasi, K Z; Fujita, G; Le Platte, G; Hufnagel, C; Keeler, G; Graney, J; Chen, T

2001-01-01

203

FOTOSNTESIS ESTACIONAL EN PLANTAS JVENES DE Agave tequilana SEASONAL PHOTOSYNTHESIS IN YOUNG PLANTS OF Agave tequilana  

Microsoft Academic Search

Studies of the effects of the environment on the photosynthesis of young plants of Agave tequilana are scarce, although these plants occupy one third of the cultivated surface in the State of Jalisco, Mxico. The effect of the seasonal variation on irradiance, air temperature and relative humidity and plant water status in the photosynthesis of young plants of A. tequilana

Eulogio Pimienta-Barrios; Julia Zaudo-Hernndez; Javier Garca-Galindo

204

Estudo de toxicologia clnica de um fitoterpico a base de associaes de plantas, mel e prpolis  

Microsoft Academic Search

, durante 28 dias ininterruptos. Os voluntrios foram includos somente se considerados saudveis, aps exames clnico e complementares que antecederam o estudo. A avaliao laboratorial inclua anlises hematolgicas, bioqumicas e sorolgicas. A mesma avaliao foi repetida aps cada semana de tratamento e no ps-estudo, sete dias aps a ltima administrao. Os resultados foram submetidos Anlise de Varincia (teste

Janaina P. Tavares; Ismael L. Martins; Ariane S. Vieira; Francisco A. V. Lima; Fernando A. F. Bezerra; Manoel O. Moraes; Maria E. A. Moraes

2006-01-01

205

Planta (2007) 226:839851 DOI 10.1007/s00425-007-0530-2  

E-print Network

Indole acetic acid NPA 1-Naphthylphthalamic acid PGPR Plant growth promotion rhizobacteria rt-PCR Real / Published online: 12 May 2007 © Springer-Verlag 2007 Abstract Certain plant growth-promoting rhizobacteria (PGPR), in the absence of physical contact with a plant stimulate growth via volatile organic compound

Paré, Paul W.

206

An open-source system for in planta gene stacking by bxb1 and cre recombinases.  

PubMed

The rapid development of crops with multiple transgenic traits arouses the need for an efficient system for creating stacked cultivars. Most major crops rely on classical breeding to introgress the transgene from a laboratory variety to the numerous cultivars adapted to different growing regions. Even with vegetative propagated crops, genetic crosses are conducted during varietal improvement prior to vegetative cloning. The probability to assort the 'x' number of transgenic loci into a single genome may seem trivial, () (x) for a diploid species, but given the 'y' number of other nontransgenic traits that breeders also need to assemble into the same genome, the () (x+y) probability for a 'breeding stack' could quickly make the line conversion process unmanageable. Adding new transgenes onto existing transgenic varieties without creating a new segregating locus would require site-specific integration of new DNA at the existing transgenic locus. Here, we tested a recombinase-mediated gene-stacking scheme in tobacco. Sequential site-specific integration was mediated by the mycobacteriophage Bxb1 integrase-catalyzed recombination between attP and attB sites. Transgenic DNA no longer needed after integration was excised by Cre recombinase-mediated recombination of lox sites. Site-specific integration occurred in ~10% of the integration events, with half of those events usable as substrates for a next round of gene stacking. Among the site-specific integrants, however, a third experienced gene silencing. Overall, precise structure and reproducible expression of the sequentially added triple traits were obtained at an overall rate of ~3% of the transformed clones-a workable frequency for the development of commercial cultivars. Moreover, since neither the Bxb1-att nor the Cre-lox system is under patent, there is freedom to operate. PMID:25281665

Hou, Lili; Yau, Yuan-Yeu; Wei, Junjie; Han, Zhiguo; Dong, Zhicheng; Ow, David W

2014-12-01

207

Pharma-Planta: road testing the developing regulatory guidelines for plant-made pharmaceuticals  

Microsoft Academic Search

Significant advances over the last few years have seen plant-made pharmaceuticals (PMPs) move from the exploratory research\\u000a phase towards clinical trials, with the first commercial products for human use expected to reach the market by 2009. Europe\\u000a has yet to witness the commercial application of PMP technology, although at least one product has begun phase II clinical\\u000a trials with others

Penelope Amelia Claire Sparrow; Judith A. Irwin; Phil J. Dale; Richard M. Twyman; Julian K. C. Ma

2007-01-01

208

Planta (1995)196:691-698 P l a n t ~ 9 Springer-Verlag 1995  

E-print Network

-mycorrhizal roots of intact Picea glauca (Moench) Voss. seedlings at four different concentration regimes - Compartmental analysis - Ni- trogen-13 - Picea Abbreviations and symbol: [NH+]cyt = cytoplasmic NH,~ concen

Kronzucker, Herbert J.

209

Gene Expression Biomarkers Provide Sensitive Indicators of in Planta Nitrogen Status in Maize[W][OA  

PubMed Central

Over the last several decades, increased agricultural production has been driven by improved agronomic practices and a dramatic increase in the use of nitrogen-containing fertilizers to maximize the yield potential of crops. To reduce input costs and to minimize the potential environmental impacts of nitrogen fertilizer that has been used to optimize yield, an increased understanding of the molecular responses to nitrogen under field conditions is critical for our ability to further improve agricultural sustainability. Using maize (Zea mays) as a model, we have characterized the transcriptional response of plants grown under limiting and sufficient nitrogen conditions and during the recovery of nitrogen-starved plants. We show that a large percentage (approximately 7%) of the maize transcriptome is nitrogen responsive, similar to previous observations in other plant species. Furthermore, we have used statistical approaches to identify a small set of genes whose expression profiles can quantitatively assess the response of plants to varying nitrogen conditions. Using a composite gene expression scoring system, this single set of biomarker genes can accurately assess nitrogen responses independently of genotype, developmental stage, tissue type, or environment, including in plants grown under controlled environments or in the field. Importantly, the biomarker composite expression response is much more rapid and quantitative than phenotypic observations. Consequently, we have successfully used these biomarkers to monitor nitrogen status in real-time assays of field-grown maize plants under typical production conditions. Our results suggest that biomarkers have the potential to be used as agronomic tools to monitor and optimize nitrogen fertilizer usage to help achieve maximal crop yields. PMID:21980173

Yang, Xiaofeng S.; Wu, Jingrui; Ziegler, Todd E.; Yang, Xiao; Zayed, Adel; Rajani, M.S.; Zhou, Dafeng; Basra, Amarjit S.; Schachtman, Daniel P.; Peng, Mingsheng; Armstrong, Charles L.; Caldo, Rico A.; Morrell, James A.; Lacy, Michelle; Staub, Jeffrey M.

2011-01-01

210

SCIENTIFIC NOTE Plantas Hospedantes de Steneotarsonemus furcatus De Leon (Acari: Tarsonemidae) en Cuba  

Microsoft Academic Search

Steneotarsonemus furcatus De Leon is a well-known phytophagous tarsonemid mite commonly found on coconut. Little is known about its host range. This note brings a list of plants from which the mite was collected in Cuba. Brachiaria plantaginea (L.) Hitch, Digitaria decumbens Stewt., Digitaria sanguinalis (L.) Scop, Echinochloa colonum (L.) Link., Echinochloa crusgalli (L.), Eleusine indica (L.) Gaertn., Panicum fasciculatum

PEDRO DE LA TORRE; LRIDA ALMAGUEL; ELEAZAR BOTTA; E IDALIA CCERES

211

In Planta Proteomics and Proteogenomics of the Biotrophic Barley Fungal Pathogen Blumeria graminis f. sp. hordei*  

PubMed Central

To further our understanding of powdery mildew biology during infection, we undertook a systematic shotgun proteomics analysis of the obligate biotroph Blumeria graminis f. sp. hordei at different stages of development in the host. Moreover we used a proteogenomics approach to feed information into the annotation of the newly sequenced genome. We analyzed and compared the proteomes from three stages of development representing different functions during the plant-dependent vegetative life cycle of this fungus. We identified 441 proteins in ungerminated spores, 775 proteins in epiphytic sporulating hyphae, and 47 proteins from haustoria inside barley leaf epidermal cells and used the data to aid annotation of the B. graminis f. sp. hordei genome. We also compared the differences in the protein complement of these key stages. Although confirming some of the previously reported findings and models derived from the analysis of transcriptome dynamics, our results also suggest that the intracellular haustoria are subject to stress possibly as a result of the plant defense strategy, including the production of reactive oxygen species. In addition, a number of small haustorial proteins with a predicted N-terminal signal peptide for secretion were identified in infected tissues: these represent candidate effector proteins that may play a role in controlling host metabolism and immunity. PMID:19602707

Bindschedler, Laurence V.; Burgis, Timothy A.; Mills, Davinia J. S.; Ho, Jenny T. C.; Cramer, Rainer; Spanu, Pietro D.

2009-01-01

212

Comparative assessments of CRISPR-Cas nucleases' cleavage efficiency in planta.  

PubMed

Custom-designed nucleases can enable precise plant genome editing by catalyzing DNA-breakage at specific targets to stimulate targeted mutagenesis or gene replacement. The CRISPR-Cas system, with its target-specifying RNA molecule to direct the Cas9 nuclease, is a recent addition to existing nucleases that bind and cleave the target through linked protein domains (e.g. TALENs and zinc-finger nucleases). We have conducted a comparative study of these different types of custom-designed nucleases and we have assessed various components of the CRISPR-Cas system. For this purpose, we have adapted our previously reported assay for cleavage-dependent luciferase gene correction in Nicotiana benthamiana leaves (Johnson et al. in Plant Mol Biol 82(3):207-221, 2013). We found that cleavage by CRISPR-Cas was more efficient than cleavage of the same target by TALENs. We also compared the cleavage efficiency of the Streptococcus pyogenes Cas9 protein based on expression using three different Cas9 gene variants. We found significant differences in cleavage efficiency between these variants, with human and Arabidopsis thaliana codon-optimized genes having the highest cleavage efficiencies. We compared the activity of 12 de novo-designed single synthetic guide RNA (sgRNA) constructs, and found their cleavage efficiency varied drastically when using the same Cas9 nuclease. Finally, we show that, for one of the targets tested with our assay, we could induce a germinally-transmitted deletion in a repeat array in A. thaliana. This work emphasizes the efficiency of the CRISPR-Cas system in plants. It also shows that further work is needed to be able to predict the optimal design of sgRNAs or Cas9 variants. PMID:25403732

Johnson, Ross A; Gurevich, Vyacheslav; Filler, Shdema; Samach, Aviva; Levy, Avraham A

2015-01-01

213

Video Article A Cell-to-cell Macromolecular Transport Assay in Planta Utilizing Biolistic  

E-print Network

and Cell Biology, SUNY At Stony Brook 2Bio-Medical Engineering Department, NED University of Engineering be used. 1. Arabidopsis plants Grow one Arabidopsis plant on Pro-Mix BX in a pot (10 cm x 10 cm x 10 cm-Mix BX in a pot (20 cm x 20 cm x 20 cm) in an environment-controlled chamber with a long photoperiod (16

Citovsky, Vitaly

214

Evite los Conceptos Err³neos cuando Ense±e sobre las Plantas  

NSDL National Science Digital Library

The resource is useful for teacher's professional development by alerting educators to many plant misconceptions in teaching literature. In the thought provoking, peer reviewed resource fifty misconceptions are identified. Some misconceptions are easier to identify because they are oversimplifications, overgeneralizations, or misidentifications. Others are more difficult to identify because they are obsolete concepts and terms or flawed research.

David R. Hershey (biology education consultant;)

2005-05-01

215

Heterologous expression of glycosyl hydrolases in planta: a new departure for biofuels.  

PubMed

The concept of expressing non-plant glycosyl hydrolase genes in plant tissue is nearly two decades old, yet relatively little work in this field has been reported. However, resurgent interest in technologies aimed at enabling processes that convert biomass to sugars and fuels has turned attention toward this intuitive solution. There are several challenges facing researchers in this field, including the development of better and more specifically targeted delivery systems for hydrolytic genes, the successful folding and post-translational modification of heterologous proteins and the development of cost-effective process strategies utilizing these transformed plants. The integration of these concepts, from the improvement of biomass production and conversion characteristics to the heterologous production of glycosyl hydrolases in a high yielding bioenergy crop, holds considerable promise for improving the lignocellulosic conversion of biomass to ethanol and subsequently to fuels. PMID:18579242

Taylor, Larry E; Dai, Ziyu; Decker, Stephen R; Brunecky, Roman; Adney, William S; Ding, Shi-You; Himmel, Michael E

2008-08-01

216

Wide Screening of Phage-Displayed Libraries Identifies Immune Targets in Planta  

PubMed Central

Microbe-Associated Molecular Patterns and virulence effectors are recognized by plants as a first step to mount a defence response against potential pathogens. This recognition involves a large family of extracellular membrane receptors and other immune proteins located in different sub-cellular compartments. We have used phage-display technology to express and select for Arabidopsis proteins able to bind bacterial pathogens. To rapidly identify microbe-bound phage, we developed a monitoring method based on microarrays. This combined strategy allowed for a genome-wide screening of plant proteins involved in pathogen perception. Two phage libraries for high-throughput selection were constructed from cDNA of plants infected with Pseudomonas aeruginosa PA14, or from combined samples of the virulent isolate DC3000 of Pseudomonas syringae pv. tomato and its avirulent variant avrRpt2. These three pathosystems represent different degrees in the specificity of plant-microbe interactions. Libraries cover up to 2107 different plant transcripts that can be displayed as functional proteins on the surface of T7 bacteriophage. A number of these were selected in a bio-panning assay for binding to Pseudomonas cells. Among the selected clones we isolated the ethylene response factor ATERF-1, which was able to bind the three bacterial strains in competition assays. ATERF-1 was rapidly exported from the nucleus upon infiltration of either alive or heat-killed Pseudomonas. Moreover, aterf-1 mutants exhibited enhanced susceptibility to infection. These findings suggest that ATERF-1 contains a microbe-recognition domain with a role in plant defence. To identify other putative pathogen-binding proteins on a genome-wide scale, the copy number of selected-vs.-total clones was compared by hybridizing phage cDNAs with Arabidopsis microarrays. Microarray analysis revealed a set of 472 candidates with significant fold change. Within this set defence-related genes, including well-known targets of bacterial effectors, are over-represented. Other genes non-previously related to defence can be associated through this study with general or strain-specific recognition of Pseudomonas. PMID:23372747

Rioja, Cristina; Van Wees, Saskia C.; Charlton, Keith A.; Pieterse, Corn M. J.; Lorenzo, Oscar; Garca-Snchez, Susana

2013-01-01

217

Origin and evolution of metal P-type ATPases in Plantae (Archaeplastida)  

PubMed Central

Metal ATPases are a subfamily of P-type ATPases involved in the transport of metal cations across biological membranes. They all share an architecture featuring eight transmembrane domains in pairs of two and are found in prokaryotes as well as in a variety of Eukaryotes. In Arabidopsis thaliana, eight metal P-type ATPases have been described, four being specific to copper transport and four displaying a broader metal specificity, including zinc, cadmium, and possibly copper and calcium. So far, few efforts have been devoted to elucidating the origin and evolution of these proteins in Eukaryotes. In this work, we use large-scale phylogenetics to show that metal P-type ATPases form a homogenous group among P-type ATPases and that their specialization into either monovalent (Cu) or divalent (Zn, Cd) metal transport stems from a gene duplication that took place early in the evolution of Life. Then, we demonstrate that the four subgroups of plant metal ATPases all have a different evolutionary origin and a specific taxonomic distribution, only one tracing back to the cyanobacterial progenitor of the chloroplast. Finally, we examine the subsequent evolution of these proteins in green plants and conclude that the genes thoroughly characterized in model organisms are often the result of lineage-specific gene duplications, which calls for caution when attempting to infer function from sequence similarity alone in non-model organisms. PMID:24575101

Hanikenne, Marc; Baurain, Denis

2013-01-01

218

Regioselectivity of glucosylation of caffeic acid by a UDP-glucose:glucosyltransferase is maintained in planta.  

PubMed Central

Caffeic acid is a phenylpropanoid playing an important role in the pathways leading to lignin synthesis and the production of a wide variety of secondary metabolites. The compound is also an antioxidant and has potential utility as a general protectant against free radicals. Three glucosylated forms of caffeic acid are known to exist: the 3- O - and 4- O -glucosides and the glucose ester. This study describes for the first time a glucosyltransferase [UDP-glucose:glucosyltransferase (UGT)] that is specific for the 3-hydroxyl, and not the 4-hydroxyl, position of caffeic acid. The UGT sequence of Arabidopsis, UGT71C1, has been expressed as a recombinant fusion protein in Escherichia coli, purified and assayed against a range of substrates in vitro. The assay confirmed that caffeic acid as the preferred substrate when compared with other hydroxycinnamates, although UGT71C1 also exhibited substantial activity towards flavonoid substrates, known to have structural features that can be recognized by many different UGTs. The expression of UGT71C1 in transgenic Arabidopsis was driven by the constitutive cauliflower mosaic virus 35 S (CaMV35S) promoter. Nine independent transgenic lines were taken to homozygosity and characterized by Northern-blot analysis, assay of enzyme activity in leaf extracts and HPLC analysis of the glucosides. The level of expression of UGT71C1 was enhanced considerably in several lines, leading to a higher level of the corresponding enzyme activity and a higher level of caffeoyl-3- O -glucoside. The data are discussed in the context of the utility of UGTs for natural product biotransformations. PMID:12741958

Lim, Eng-Kiat; Higgins, Gillian S; Li, Yi; Bowles, Dianna J

2003-01-01

219

LES MODES DE CONTROLE ENTRE CLIENTS ET FOURNISSEURS  

E-print Network

équipementier automobile et ses fournisseurs. L'étude montre que le client utilise séparément ou conjointement to be a strategy of informal control for the dominated party. Keywords : interorganisational control ­ buyer aussi variées que le marketing (Bonoma et Johnston, 1978 ; Morgan et Hunt, 1994 ; Skinner et al., 1992

Paris-Sud XI, Université de

220

LES MODES DE CONTROLE ENTRE CLIENTS ET FOURNISSEURS  

E-print Network

équipementier automobile et ses fournisseurs. L'étude montre que le client utilise séparément ou conjointement to be a strategy of informal control for the dominated party. Keywords : interorganisational control ­ buyer dans des disciplines aussi variées que le marketing (Bonoma et Johnston, 1978 ; Morgan et Hunt, 1994

Paris-Sud XI, Université de

221

Physiologie vgtale Relations entre le stade de dveloppement du liseron  

E-print Network

(Convolvulus arvensis) ont été étudiés en déposant les herbicides radioactifs sur des feuilles portées par les mobilité de ce dernier. 2, 4-D - glyphosate - Convolvulus arvensis L. - transport - métabolisme Summary (Convolvulus arvensis L.). Absorption, translocation and metabolism of 2.4-D and glyphosate in field bindweed

Paris-Sud XI, Université de

222

Primero Segundo Tercero Cuarto Diagrama de Dependencias Entre Asignaturas  

E-print Network

Informáticos I NC = Fundamentos de Neurocomputación (OP) TACC2 = Temas Avanzados en Ciencia de la Computación Artificial RC1 = Redes de Comunicaciones I AA = Análisis de Algoritmos (OP) CC1 = Computación Científica I del Conocimiento RC2 = Redes de Comunicaciones II TAII2 = Temas Avanzados en Ingeniería Informática I

Shafti, Leila

223

Le cannabis dans les armes: entre pass et actualit  

Microsoft Academic Search

Cannabis in the army is a reality the authors have chosen to inscribe in a temporality, from the concept of mental hygiene to the history of cannabis and of its spreading in the French population, so as to apprehend the present interest in cannabis in the army. Consumption of psychoactive drugs in military forces actually dates back to some decades,

C. Gheorghiev; P. Arvers; F. de Montleau; G. Fidelle; B. Queyriaux; C. Verret

2009-01-01

224

GPS, punto de contacto entre la Astronoma y otras disciplinas  

NASA Astrophysics Data System (ADS)

En los primeros aos de la pasada dcada, un grupo de Astrnomos de La Plata iniciaron trabajos de investigacin en Geodesia Satelital. En esta presentacin se propone repasar sus principales logros y situarlos en el contexto del desarrollo de la disciplina a nivel mundial. Por entonces las aplicaciones prcticas de la disciplina eran indirectas y solo evidentes para los especialistas. Los errores del Posicionamiento Satelital eran de varios metros y en posicionamiento relativo, del orden de medio metro. Estos resultados se lograban al cabo de varios das de medicin continuada. En los aos siguientes, el sistema GPS alcanz su nivel operacional y produjo una revolucin tanto en lo relacionado con los tiempos de medicin como con las precisiones. El grupo de La Plata se desarroll simultneamente con GPS, lo que posibilit su participacin actual en diversos temas vigentes: aplicaciones de alta precisin para la materializacin de sistemas terrestres de referencia, monitoreo de movimientos de la corteza, contribucin con servicios internacionales para la determinacin de movimientos tectnicos globales y regionales, monitoreo de la ionsfera a partir de la propagacin de las seales, determinacin de la ondulacin del geoide a escala local, etc. Tambin se generaron muchas aplicaciones prcticas algunas en tiempo real: navegacin, apoyo a imgenes areas o satelitales, aplicaciones a la agricultura, catastro y ordenamiento territorial, apoyo a relevamientos geofsicos, etc.

Perdomo, R.

225

Neutrinos astrofsicos : mecanismo de produo e razo entre sabores.  

E-print Network

??Neutrinos Astrofsicos so produzidos quando prtons ou ncleos, acelerados numa fonte astrofsica, interagem com a matria nas imediaes gerando mons que decaem fracamente produzindo neutrinos. (more)

Renan Picoreti

2011-01-01

226

Predictores de Conductas Sexuales de Riesgo entre Adolescentes  

Microsoft Academic Search

This study evaluates the sexual risk predictors (predictors of sexual intercourse without condom) that may cause infection by STD\\/AIDS, considering the frequency and the use of contraceptive methods. It analyzes socio-demographic, psychosocial and health variables. The sample was composed by 389 youths, third-year high school students from Porto Alegre, Brazil. Through a binary logistic regression analisys we have found that

Sheila Gonalves Cmara; Jorge Castell Sarriera; Mary Sandra Carlotto

2007-01-01

227

Rito Funerrio entre os Florianopolitanos: corpos em dilogo  

Microsoft Academic Search

Abertura Quando os espanhis encontraram-se com os amerndios, o que os livros de histria teimam em chamar de descobrimento, cosmologias diferentes foram postas em contato, num processo vigoroso de estranhamento do outro. Cada qual a sua maneira tratou de descobrir quem era este \\

Fernando Gonalves Bitencourt

228

AS SENSAES CORPORAIS: DISTINO ENTRE PAIXES E SENTIDOS NO FDON  

Microsoft Academic Search

In Plato's criticism of the body in the dialogue Phaedo, he initially using a general term that determines both the senses and the pains, pleasures and desires inserted in the same category and in the same understanding. The term used, the bodily sensations corresponding to the form of referring to the body with respect to the fact that the latter

Ana Rafaella; Pereira Melo

229

La culture informationnelle, entre SIC et Sed Yolande Maury  

E-print Network

-saxonnes que l'information literacy a pris corps et s'est imposée. Dès les premières définitions (années 1980, Johnston, Bill. Information literacy: definitions and models. 2006. http://dis.shef.ac.uk/literacy vaste champ des problématiques abordées par les sciences de l'information et de la communication, la

230

Las personas con diabetes deben lograr un balance entre los  

E-print Network

en un lado del plato y los alimentos bajos en carbohidratos al otro lado. Karen Halderson, MPH, RD bajos en carbohidratos, manteniendo cada uno en su propio lado del plato o de la mesa. Comer vegetales en diferentes lados de su plato y ver si su plato está "balanceado". Sin embargo, muchas veces

231

Comorbilidad entre trastorno bipolar y migraa: una revisin sistemtica  

Microsoft Academic Search

Introduction: Migraine and bipolar disorder (BD) are prevalent conditions and of great relevance for the general population. Some studies have informed of their association but until now we don't know if it is real. Objective: To conduct a systematic review to evaluate the known evidence of the association between migraine and BD. Methods: A search was placed in Medline, Proquest

Germn Eduardo; Rueda Jaimes; Ivn Augusto; Gaona Barbosa; Yuli Andrea Martnez Ladino

2005-01-01

232

ENTRE GUERRE ET RECONSTRUCTION : REMBLAIS ET EMPIETEMENTS LITTORAUX A BEYROUTH*  

E-print Network

pression urbaine tend à la mise en valeur de tous les espaces libres, et notamment de ceux qui sont les'urbanisation de cet espace durant ces deux périodes. A travers l'exemple des projets de remblais qui se des zones portuaires, 24 par des zones industrielles ou commerciales et 4 km par des remblais divers

Paris-Sud XI, Université de

233

Mobilidade dos Funcionrios pblicos Federais: Diferenas Entre os Poderes  

Microsoft Academic Search

Based on a special Rais-Migra tabulation that allows one to trace work trajectories,the present study estimates the total length of service for active federal civil servants,disaggregated by length of time spent at present post. Prior time is also considered,whether spent in other civil service posts or in private employment.This study was largely motivated by the need to estimate the civil

Kaiz Iwakami Beltro; Sonoe Sugahara; Fernanda Paes Leme Peyneau; Joo Luis de Oliveira Mendona

2005-01-01

234

Ambivalencia e incertidumbre en las relaciones entre ciencia y sociedad  

Microsoft Academic Search

Ambivalence and uncertainty in the relationships between science and society The science-society relationship has gone by several circumstances along the history. At the present, their relationship is marked by the ambivalence and the uncertainty that it generates diverse upsets into and among both spheres. The advance of the techno-sci- entific sphere and the difference and the threat perception that society

J. Rubn Blanco; Juan Manuel Iranzo Amatrian

2000-01-01

235

DINNER MENU 5 (Limit 1 Hot or 1 Cold Entre)  

E-print Network

, Vanilla Sherbet: Raspberry, Orange Italian Ice: Cherry, Watermelon, Lemon Fresh Fruit : Apple, Banana, Orange, Grapes, Pineapple, Fresh Fruit Cup, Prunes Canned Fruit : Peaches, Pears, Applesauce Light Yogurt CARDIAC/2 GRAM SODIUM DIET ACCOMPANIMENTS: Fresh Fruit : Apple, Banana, Orange, Grapes, Pineapple Fresh

Oliver, Douglas L.

236

Amlioration des plantes Une comparaison entre des bls hybrides  

E-print Network

du rendement Summary A comparison between wheat hybrids produced using a chemical hybridizing of experimentation enabled a comparison to be made of 34 winter wheat hybrids with their parents. This material has), on a par with mid-parent for number of ears per m2, fertility of ear, and har- vest-index (fig 2, table III

Paris-Sud XI, Université de

237

Relacin entre hbitos de vida y calificaciones escolares en adolescentes  

Microsoft Academic Search

BackgroundSeveral studies have shown that academic performance in adolescents is closely related to alcohol intake, smoking, and the number of hours spent watching television. The aim of the present study was to determine the association between the time spent watching television, smoking and alcohol intake with academic grades in adolescents in Majorca (Spain).

Francisco M. Kovacs; Mara Teresa Gil del Real; Mario Gestoso; Javier Lpez; Nicole Mufraggi; Pere Palou

2008-01-01

238

Relaci entre hbits de vida i qualificacions escolars en adolescents  

Microsoft Academic Search

Diversos estudis han mostrat que el rendiment acadmic dels adolescents est estretament vinculat al consum d'alcohol i tabac i a les hores de televisi que veuen. L'objectiu d'aquest estudi s determinar la relaci del temps de televisi, el tabaquisme i el consum d'alcohol amb les qualificacions escolars d'adolescents de Mallorca, Espanya. Mtodes: Es van registrar dades sobre la prctica d'esports,

Mara Teresa Gil del Real; Francisco M. Kovacs; Mario Gestoso; Javier Lpez; Nicole Mufraggi; Pere Palou Sampol

2009-01-01

239

Mecanismos de modulacin por atencin selectiva entre reas corticales  

E-print Network

Referencias Índice 1 3 4 5 8 8 11 13 15 16 21 26 29 30 31 32 35 38 40 41 45 51 #12;#12;Capítulo 1 actividad de las neuronas de la corteza visual depende de sobre qué zona del campo visual se encuentra

Ardid, Salva

240

Carme Torras descriu la lluita entre dues generacions de dones  

E-print Network

a escriure bio- grafies per encàrrec. La bio- grafia de Nydia Aréchiga, una famosa ballarina, ara ja reti una mare pot relacionar-se amb més d'un fill, per què no amb més d'un marit? O un fill amb més d

Torras, Carme

241

O USO DE BEBIDAS ENERGTICAS ENTRE ESTUDANTES DE EDUCAO FSICA  

Microsoft Academic Search

This descriptive and cross-sectional study aimed to characterize the pattern of energy drinks consumption in a sample of physical education students through a self-applied questionnaire (socio-demographic data and characterization of consumption). Variables associated with consumption: gender, marital status, attending gym classes, athletic swim practice, and study in the morning. Consumption pattern (n=137): 2.2% once in their lives, 9.5% at least

Martha Carmen Ballistreri

242

FINDING SPEAKER IDENTITIES WITH A CONDITIONAL MAXIMUM ENTR OPY MODEL  

Microsoft Academic Search

In this paper, we address the task of identifying the speaker s by name in audio content. Identification of speakers by name hel ps to improve the readability of the transcript and also provides additional meta-data which can help in finding the audio content of inter est. We present a conditional maximum entropy (maxent) framework for this problem which yields

Chengyuan Ma; Patrick Nguyen; Milind Mahajan

243

Compatibilidad sexual entre dos tipos de Hylocerus (Cactaceae)  

Microsoft Academic Search

There are two types of pitahaya that are cultivated in Yucatan Peninsula of Mexico. They differ main- ly in the skin color of the fruit, one of them has a red skin (Uqroo1), while the other has a light yellow skin (Uqroo2) both belong to Hylocereus undatus (Haworth) Britt. & Rose. The yellow skin pitahaya is the sweetest. The studies

Roberta Castillo; Manuel Livera M; Alicia E. Brech; Judith Mrquez-Guzmn

244

A Astronomia no Ensino Superior Brasileiro entre 1808 e 1889  

NASA Astrophysics Data System (ADS)

Este artigo apresenta os principais eventos ocorridos na histria do ensino de astronomia nos cursos superiores que existiram no Brasil desde a chegada da Famlia Real portuguesa em 1808 at o final do perodo monrquico. Para compor esse esboo histrico, utilizamos, principalmente, livros didticos, regulamentos, decretos e leis responsveis pelas organizaes dos contedos oferecidos e das carreiras dos responsveis pela disciplina. Na anlise do material empregado, investigamos a presena de concepes filosficas e cientficas, que podem ter norteado os contedos disciplinares. No realizamos nenhuma comparao com o ensino de astronomia em outros pases. Conclumos mostrando que o estudo de astronomia, durante o perodo monrquico, foi mais direcionado para a formao d engenheiros do que astrnomos. Gostaramos de observar que o presente artigo no tem a pretenso de abordar o assunto de maneira completa e detalhada.

Bretones, Paulo S.; Videira, Antonio A. P.

2003-05-01

245

In planta imaging of ?9-tetrahydrocannabinolic acid in Cannabis sativa L. with hyperspectral coherent anti-Stokes Raman scattering microscopy  

NASA Astrophysics Data System (ADS)

Nature has developed many pathways to produce medicinal products of extraordinary potency and specificity with significantly higher efficiencies than current synthetic methods can achieve. Identification of these mechanisms and their precise locations within plants could substantially increase the yield of a number of natural pharmaceutics. We report label-free imaging of ?9-tetrahydrocannabinolic acid (THCa) in Cannabis sativa L. using coherent anti-Stokes Raman scattering microscopy. In line with previous observations we find high concentrations of THCa in pistillate flowering bodies and relatively low amounts within flowering bracts. Surprisingly, we find differences in the local morphologies of the THCa-containing bodies: organelles within bracts are large, diffuse, and spheroidal, whereas in pistillate flowers they are generally compact, dense, and have heterogeneous structures. We have also identified two distinct vibrational signatures associated with THCa, both in pure crystalline form and within Cannabis plants; at present the exact natures of these spectra remain an open question.

Garbacik, Erik T.; Korai, Roza P.; Frater, Eric H.; Korterik, Jeroen P.; Otto, Cees; Offerhaus, Herman L.

2013-04-01

246

Traditional plants as source of functional foods: a review Plantas tradicionales como fuente de alimentos funcionales: una revisin  

Microsoft Academic Search

The aim of this work was to assess the following plants as functional foods that can be found in Mexico: white sapote (Casimiroa edulis), jicama (Pachyrhizus spp.), amaranth (Amaranthus hypochondriacus), sweet fennel (Foeniculum vulgare), oregano (Lippia graveolens), pitahaya (Hylocereus sp.), agave (Agave americana), pelitre (Heliopsis longipes), and purslane (Portulaca oleracea L). The main characteristics, components and active substances, forms of

G. Rivera; V. Bocanegra-Garca; A. Monge

2010-01-01

247

Plantas con Flores: Claves para la Evoluci³n de la Tierra y Para el Bienestar Humano  

NSDL National Science Digital Library

The issue-focused interview discusses how angiosperms, or flowering plants, are important because they hold clues to the evolutionary history of our planet, provide sources of food, medicine, and shelter to humans, and serve as food and habitat for many other organisms.

Pamela Soltis (University of Florida, Gainesville;)

2006-03-01

248

Antibiosis and Antagonism of Sclerotinia homoeocarpa and Drechslera poae by Pseudomonas fluorescens Pf-5 In Vitro and In Planta.  

PubMed

ABSTRACT Pseudomonas fluorescens strain Pf-5, which produces several antifun-gal metabolites, including the antibiotics pyoluteorin, pyrrolnitrin, and 2,4-diacetylphloroglucinol, was tested for its ability to inhibit Sclerotinia homoeocarpa (causal agent of dollar spot) and Drechslerapoae (causal agent of 'melting-out') in vitro and in turfgrass; Tn5 mutants with altered antibiotic production also were tested. Inhibition in vitro differed with the medium used, but both fungi generally were inhibited by Pf-5. In most cases, a mutant deficient in pyoluteorin but not pyrrolnitrin or 2,4-di-acetylphloroglucinol was as inhibitory as Pf-5, whereas a pyrrolnitrin-deficient mutant was less inhibitory than Pf-5 in most fungus/medium combinations. High-performance liquid chromatography analysis of culture extracts showed that bacterial genotype and nutrition have an interactive effect on antibiotic production, such that conditions causing an increase in one antibiotic may increase or decrease another. The purported deficiencies for the pyrrolnitrin- and pyoluteorin-deficient mutants were confirmed. In S. homoeocarpa-infested grass clippings incubated in a moist chamber, Pf-5 reduced mycelial growth, whereas the pyrrolnitrin-deficient mutant did not and the pyoluteorin-deficient mutant was intermediate. In greenhouse experiments, Pf-5 reduced dollar spot disease incidence in bentgrass and bluegrass when sprayed over inoculated turf. In grass clippings infested with D. poae and incubated in a moist chamber under favorable conditions for spore production, Pf-5 did not reduce significantly the number of spores produced compared with the non-treated control. However, Pf-5 reduced melting-out disease incidence and severity in bluegrass inoculated with spores of D. poae under greenhouse conditions. PMID:18945079

Rodriguez, F; Pfender, W F

1997-06-01

249

Vascular Streak Dieback of cacao in Southeast Asia and Melanesia: in planta detection of the pathogen and a new taxonomy.  

PubMed

Vascular Streak Dieback (VSD) disease of cacao (Theobroma cacao) in Southeast Asia and Melanesia is caused by a basidiomycete (Ceratobasidiales) fungus Oncobasidium theobromae (syn. =Thanatephorus theobromae). The most characteristic symptoms of the disease are green-spotted leaf chlorosis or, commonly since about 2004, necrotic blotches, followed by senescence of leaves beginning on the second or third flush behind the shoot apex, and blackening of infected xylem in the vascular traces at the leaf scars resulting from the abscission of infected leaves. Eventually the shoot apex is killed and infected branches die. In susceptible cacao the fungus may grow through the xylem down into the main stem and kill a mature cacao tree. Infections in the stem of young plants prior to the formation of the first 3-4 lateral branches usually kill the plant. Basidiospores released from corticioid basidiomata developed on leaf scars or along cracks in the main vein of infected leaves infect young leaves. The pathogen commonly infects cacao but there are rare reports from avocado. As both crops are introduced to the region, the pathogen is suspected to occur asymptomatically in native vegetation. The pathogen is readily isolated but cultures cannot be maintained. In this study, DNA was extracted from pure cultures of O. theobromae obtained from infected cacao plants sampled from Indonesia. The internal transcribed spacer region (ITS), consisting of ITS1, 5.8S ribosomal RNA and ITS2, and a portion of nuclear large subunit (LSU) were sequenced. Phylogenetic analysis of ITS sequences placed O. theobromae sister to Ceratobasidium anastomosis groups AG-A, AG-Bo, and AG-K with high posterior probability. Therefore the new combination Ceratobasidium theobromae is proposed. A PCR-based protocol was developed to detect and identify C. theobromae in plant tissue of cacao enabling early detection of the pathogen in plants. A second species of Ceratobasidium, Ceratobasidium ramicola, identified through ITS sequence analysis, was isolated from VSD-affected cacao plants in Java, and is widespread in diseased cacao collected from Indonesia. PMID:22208598

Samuels, Gary J; Ismaiel, Adnan; Rosmana, Ade; Junaid, Muhammad; Guest, David; McMahon, Peter; Keane, Philip; Purwantara, Agus; Lambert, Smilja; Rodriguez-Carres, Marianela; Cubeta, Marc A

2012-01-01

250

In planta sequential hydroxylation and glycosylation of a fungal phytotoxin: Avoiding cell death and overcoming the fungal invader  

PubMed Central

To facilitate plant colonization, some pathogenic fungi produce phytotoxic metabolites that damage tissues; plants may be resistant to a particular pathogen if they produce an enzyme(s) that catalyzes detoxification of this metabolite(s). Alternaria blackspot is one of the most damaging and significant fungal diseases of brassica crops, with no source of resistance known within the Brassica species. Destruxin B is the major phytotoxin produced by the blackspot-causing fungus, Alternaria brassicae (Berkley) Saccardo. We have established that a blackspot-resistant species (Sinapis alba) metabolized 14C-labeled destruxin B to a less toxic product substantially faster than any of the susceptible species. The first metabolite, hydroxydestruxin B (14C-labeled), was further biotransformed to the ?-d-glucosyl derivative at a slower rate. The structures of hydroxydestruxin B and ?-d-glucosyl hydroxydestruxin B were deduced from their spectroscopic data [NMR, high resolution (HR)-MS, Fourier transform infrared (FTIR)] and confirmed by total chemical synthesis. Although these hydroxylation and glucosylation reactions occurred in both resistant (S. alba) and susceptible (Brassica napus, Brassica juncea, and Brassica rapa) species, hydroxylation was the rate limiting step in the susceptible species, whereas glucosylation was the rate limiting step in the resistant species. Remarkably, it was observed that the hydroxydestruxin B induced the biosynthesis of phytoalexins in blackspot-resistant species but not in susceptible species. This appears to be a unique example of phytotoxin detoxification and simultaneous phytoalexin elicitation by the detoxification product. Our studies suggest that S. alba can overcome the fungal invader through detoxification of destruxin B coupled with production of phytoalexins. PMID:11149945

Pedras, M. S. C.; Zaharia, I. L.; Gai, Y.; Zhou, Y.; Ward, D. E.

2001-01-01

251

Modeling, identification, and validation of models for predictive ammonia control in a wastewater treatment plant--a case study.  

PubMed

The aim of this work is to develop the ammonia models that could be used for model predictive control (MPC) of nitrification process in a wastewater treatment plant. First, a reduced nonlinear model is presented, which is based on expression for nitrification reaction rate in activated sludge model No. 1 and modified for attached biomass processes, while second, a linear black-box model is shown. The data used for model identification were collected during several weeks of experiments on a real plant so that good identification data were obtained. The designed models were validated based on open loop simulations and predictions. Validation results show that the reduced nonlinear model performs better compared to the linear model, however, both models show relatively large errors compared to the real plant data. Hence, a closed loop simulation study was performed to see the differences between the performance of model predictive controller using previously estimated linear and nonlinear models and a standard proportional integral (PI) controller. From the simulation study results it was seen that in spite of relatively large model errors the MPC algorithms give better results in terms of ammonia removal compared to the PI controller, while MPC with the nonlinear model shows additional improvements over the MPC with the linear model. PMID:16649563

Stare, Aljaz; Hvala, Nadja; Vrecko, Darko

2006-04-01

252

A Meloidogyne incognita effector is imported into the nucleus and exhibits transcriptional activation activity in?planta.  

PubMed

Root-knot nematodes are sedentary biotrophic endoparasites that maintain a complex interaction with their host plants. Nematode effector proteins are synthesized in the oesophageal glands of nematodes and secreted into plant tissue through a needle-like stylet. Effectors characterized to date have been shown to mediate processes essential for nematode pathogenesis. To gain an insight into their site of action and putative function, the subcellular localization of 13 previously isolated Meloidogyne incognita effectors was determined. Translational fusions were created between effectors and EGFP-GUS (enhanced green fluorescent protein-?-glucuronidase) reporter genes, which were transiently expressed in tobacco leaf cells. The majority of effectors localized to the cytoplasm, with one effector, 7H08, imported into the nuclei of plant cells. Deletion analysis revealed that the nuclear localization of 7H08 was mediated by two novel independent nuclear localization domains. As a result of the nuclear localization of the effector, 7H08 was tested for the ability to activate gene transcription. 7H08 was found to activate the expression of reporter genes in both yeast and plant systems. This is the first report of a plant-parasitic nematode effector with transcriptional activation activity. PMID:24863562

Zhang, Lei; Davies, Laura J; Elling, Axel A

2015-01-01

253

Inhibitory effect of Xenorhabdus nematophila TB on plant pathogens Phytophthora capsici and Botrytis cinerea in vitro and in planta  

PubMed Central

Entomopathogenic bacteria Xenorhabdus spp. produce secondary metabolites with potential antimicrobial activity for use in agricultural productions. This study evaluated the inhibitory effect of X. nematophila TB culture on plant pathogens Botrytis cinerea and Phytophthora capsici. The cell-free filtrate of TB culture showed strong inhibitory effects (>90%) on mycelial growth of both pathogens. The methanol-extracted bioactive compounds (methanol extract) of TB culture also had strong inhibitory effects on mycelial growth and spore germinations of both pathogens. The methanol extract (1000??g/mL) and cell-free filtrate both showed strong therapeutic and protective effects (>70%) on grey mold both in detached tomato fruits and plants, and leaf scorch in pepper plants. This study demonstrates X. nematophila TB produces antimicrobial metabolites of strong activity on plant pathogens, with great potential for controlling tomato grey mold and pepper leaf scorch and being used in integrated disease control to reduce chemical application. PMID:24599183

Fang, Xiangling; Zhang, Manrang; Tang, Qian; Wang, Yonghong; Zhang, Xing

2014-01-01

254

PATHOGENICITY AND IN PLANTA MYCOTOXIN ACCUMULATION AMONG MEMBERS OF THE FUSARIUM GRAMINEARUM SPECIES COMPLEX ON WHEAT AND RICE  

Technology Transfer Automated Retrieval System (TEKTRAN)

Fusarium head blight (FHB), or scab, is a destructive disease of small grains caused by members of the Fusarium graminearum (Fg) species complex, comprised of at least nine distinct, cryptic species. Members of this complex are known to produce mycotoxins including the trichothecenes deoxynivalenol ...

255

Production and characterization of in planta transiently produced polygalacturanase from Aspergillus niger and its fusions with hydrophobin or ELP tags  

PubMed Central

Background Pectinases play an important role in plant cell wall deconstruction and have potential in diverse industries such as food, wine, animal feed, textile, paper, fuel, and others. The demand for such enzymes is increasing exponentially, as are the efforts to improve their production and to implement their use in several industrial processes. The goal of this study was to examine the potential of producing polygalacturonase I from Aspergillus niger in plants and to investigate the effects of subcellular compartmentalization and protein fusions on its accumulation and activity. Results Polygalacturonase I from Aspergillus niger (AnPGI) was transiently produced in Nicotiana benthamiana by targeting it to five different cellular compartments: apoplast, endoplasmic reticulum (ER), vacuole, chloroplast and cytosol. Accumulation levels of 2.5%, 3.0%, and 1.9% of total soluble protein (TSP) were observed in the apoplast, ER, and vacuole, respectively, and specific activity was significantly higher in vacuole-targeted AnPGI compared to the same enzyme targeted to the ER or apoplast. No accumulation was found for AnPGI when targeted to the chloroplast or cytosol. Analysis of AnPGI fused with elastin-like polypeptide (ELP) revealed a significant increase in the protein accumulation level, especially when targeted to the vacuole where the protein doubles its accumulation to 3.6% of TSP, while the hydrophobin (HFBI) fusion impaired AnPGI accumulation and both tags impaired activity, albeit to different extents. The recombinant protein showed activity against polygalacturonic acid with optimum conditions at pH5.0 and temperature from 30 to 50C, depending on its fusion. In vivo analysis of reducing sugar content revealed a higher release of reducing sugars in plant tissue expressing recombinant AnPGI compared to wild type N. benthamiana leaves. Conclusion Our results demonstrate that subcellular compartmentalization of enzymes has an impact on both the target protein accumulation and its activity, especially in the case of proteins that undergo post-translational modifications, and should be taken into consideration when protein production strategies are designed. Using plants to produce heterologous enzymes for the degradation of a key component of the plant cell wall could reduce the cost of biomass pretreatment for the production of cellulosic biofuels. PMID:24970673

2014-01-01

256

Health risk assessment of air emissions from a municipal solid waste incineration plant--a case study.  

PubMed

A health risk assessment of long-term emissions of carcinogenic and non-carcinogenic air pollutants has been carried out for the municipal solid waste incinerator (MSWI) of the city of Taranto, Italy. Ground level air concentrations and soil deposition of carcinogenic (Polychlorinated Dibenzo-p-Dioxins/Furans and Cd) and non-carcinogenic (Pb and Hg) pollutants have been estimated using a well documented atmospheric dispersion model. Health risk values for air inhalation, dermal contact, soil and food ingestion have been calculated based on a combination of these concentrations and a matrix of environmental exposure factors. Exposure of the surrounding population has been addressed for different release scenarios based on four pollutants, four exposure pathways and two receptor groups (children and adults). Spatial risk distribution and cancer excess cases projected from plant emissions have been compared with background mortality records. Estimated results based on the MSWI emissions show: (1) individual risks well below maximum acceptable levels, (2) very small incremental cancer risk compared with background level. PMID:17611096

Cangialosi, Federico; Intini, Gianluca; Liberti, Lorenzo; Notarnicola, Michele; Stellacci, Paolo

2008-01-01

257

Remote sensing of gene expression in Planta: transgenic plants as monitors of exogenous stress perception in extraterrestrial environments  

NASA Technical Reports Server (NTRS)

Transgenic arabidopsis plants containing the alcohol dehydrogenase (Adh) gene promoter fused to the green fluorescent protein (GFP) reporter gene were developed as biological sensors for monitoring physiological responses to unique environments. Plants were monitored in vivo during exposure to hypoxia, high salt, cold, and abcissic acid in experiments designed to characterize the utility and responses of the Adh/GFP biosensors. Plants in the presence of environmental stimuli that induced the Adh promoter responded by expressing GFP, which in turn generated a detectable fluorescent signal. The GFP signal degraded when the inducing stimulus was removed. Digital imaging of the Adh/GFP plants exposed to each of the exogenous stresses demonstrated that the stress-induced gene expression could be followed in real time. The experimental results established the feasibility of using a digital monitoring system for collecting gene expression data in real time from Transgenic Arabidopsis Gene Expression System (TAGES) biosensor plants during space exploration experiments.

Manak, Michael S.; Paul, Anna-Lisa; Sehnke, Paul C.; Ferl, Robert J.

2002-01-01

258

Characterization of a strong, constitutive mung bean (Vigna radiata L.) promoter with a complex mode of regulation in planta.  

PubMed

We report the cloning and characterization in tobacco and Arabidopsis of a Vigna radiata L. (mung bean) promoter that controls the expression of VR-ACS1, an auxin-inducible ACC synthase gene. The VR-ACS1 promoter exhibits a very unusual behavior when studied in plants different from its original host, mung bean. GUS and luciferase in situ assays of transgenic plants containing VR-ACS1 promoter fusions show strong constitutive reporter gene expression throughout tobacco and Arabidopsis development. In vitro quantitative analyses show that transgenic plants harboring VR-ACS1 promoter-reporter constructs have on average 4-6 fold higher protein and activity levels of both reporter genes than plants transformed with comparable CaMV 35S promoter fusions. Similar transcript levels are present in VR-ACS1 and CaMV 35S promoter lines, suggesting that the high levels of gene product observed for the VR-ACS1 promoter are the combined result of transcriptional and translational activation. All tested deletion constructs retaining the core promoter region can drive strong constitutive promoter activity in transgenic plants. This is in contrast to mung bean, where expression of the native VR-ACS1 gene is almost undetectable in plants grown under normal conditions, but is rapidly and highly induced by a variety of stimuli. The constitutive behavior of the VR-ACS1 promoter in heterologous hosts is surprising, suggesting that the control mechanisms active in mung bean are impaired in tobacco and Arabidopsis. The 'aberrant' behavior of the VR-ACS1 promoter is further emphasized by its failure to respond to auxin and cycloheximide in heterologous hosts. VR-ACS1 promoter regulatory mechanisms seem to be different from all previously characterized auxin-inducible promoters. PMID:16315097

Cazzonelli, Christopher I; McCallum, Emily J; Lee, Rebecca; Botella, Jos Ramn

2005-12-01

259

In planta detection of Xanthomonas axonopodis pv. commiphorae using fyuA and rpoD genes.  

PubMed

Guggal is tapped for extraction of medicinally important oleo-gum-resin (guggul) by inoculating the stem bark with natural gum suspension containing pathogenic bacterium Xanthomonas axonopodis pv. commiphorae (Xac). The tree dies in the process. In absence of any specific medium for isolation of Xac, it is difficult to assess spread of the pathogen within the plant. A PCR based molecular detection technique usingfyuA and rpoD gene specific primers is described here. The primers amplified products only from Xac and not from host tissues or common saprophytes. The method was sensitive enough to produce positive signals for up to 4.4 bacterial cells or 2 pg target DNA per reaction mixture. However, PCR inhibitors present in plant tissues drastically reduced the limit of detection. A simple overnight incubation of surface sterilised plant tissues in nutrient medium was introduced to increase pathogen titre and to overcome this problem. This technique was successfully used to measure spread of Xac in plant tissues away from the site of inoculation. The pathogen showed preference for acropetal movement and did not spread to 7-8 cm below the site of inoculation till 15 days after inoculation. This suggests possibility to manage the disease through plant surgery. PMID:23926696

Samanta, Jatindra Nath; Mandal, Kunal

2013-06-01

260

Production of recombinant single chain antibodies (scFv) in vegetatively reproductive Kalanchoe pinnata by in planta transformation.  

PubMed

We developed an asexual reproductive plant, Kalanchoe pinnata, as a new bioreactor for plant-based molecular farming using a newly developed transformation method. Leaf crenate margins were pin-pricked to infect the plant with the Agrobacterium strain LBA4404 and vacuum infiltration was also applied to introduce the target gene into the plants. Subsequently, the young mother leaf produced new clones at the leaf crenate margins without the need for time- and labor-consuming tissue culture procedures. The average transformation rates were approximately 77 and 84% for pin-prickling and vacuum-infiltration methods, respectively. To functionally characterize an introduced target protein, a nucleic acid hydrolyzing recombinant 3D8 scFv was selected and the plant based 3D8 scFv proteins were purified and analyzed. Based on abzyme analysis, the purified protein expressed with this system had catalytic activity and exhibited all of properties of the protein produced in an E. coli system. This result suggested that vegetatively reproductive K. pinnata can be a novel and potent bioreactor for bio-pharmaceutical proteins. PMID:19688214

Jung, Yuchul; Rhee, Yong; Auh, Chung-Kyoon; Shim, Hyekyung; Choi, Jung-Jin; Kwon, Suk-Tae; Yang, Joo-Sung; Kim, Donggiun; Kwon, Myung-Hee; Kim, Yong-Sung; Lee, Sukchan

2009-10-01

261

Planta (1994)193:421~429 P l a n t a 9 Springer-u 1994  

E-print Network

, where F A was under some conditions higher at low than at high rates of carbon assimilation, are ex not change much as irradiances increased from low to high photon flux densities. When ATP relationship existed also between the quantum efficiency of electron flow through photosystem II

Schönknecht, Gerald

262

Transient RNAi assay in 96-well plate format facilitates high-throughput gene function studies in planta.  

PubMed

Here we describe a rapid high-throughput method for performing RNA interference (RNAi) in moss, in which phenotyping is performed within 1 week after transformation. The moss Physcomitrella patens is a great plant model system for reverse genetic studies due to its amenability to homologous recombination as well as RNAi. Our lab has developed a rapid RNAi assay to screen for growth phenotypes in moss protonemal tissue. Here we describe how we have recently further facilitated this assay by modifying the PEG-mediated transformation protocol allowing for transformations to be carried out in a semiautomated fashion in a 96-well plate format. PMID:22893297

Wu, Shu-Zon; Bezanilla, Magdalena

2012-01-01

263

Use of a PTGS-MAR expression system for efficient in planta production of bioactive Arabidopsis thaliana plant defensins  

Microsoft Academic Search

Plant defensins, exhibiting various levels of inhibitory activity against fungal pathogens, are potent candidates for pharmaceutical\\u000a or agricultural antimycotics. Study of the plant defensins from the model plant Arabidopsis thaliana requires the purification of these peptides. However, heterologous production of defensins for large-scale in vitro bioactivity\\u000a assays is often experienced as a major problem. In this study we describe the

Jan Sels; Stijn L. Delaur; An M. Aerts; Paul Proost; Bruno P. A. Cammue; Miguel F. C. De Bolle

2007-01-01

264

Planta (1995)196:683-690 P l a n t a (62)Springer-Verlag1995  

E-print Network

by externally supplied nitrate was moni- tored in roots of intact Picea glauca (Moench) Voss. seedlings over a 5 - Nitrate (induction of uptake) - Nitrate reductase - Nitrogen-13 - Picea Abbreviations and symbol: [NO3 ]cy

Kronzucker, Herbert J.

265

A visual identification key utilizing both gestalt and analytic approaches to identification of Carices present in North America (Plantae, Cyperaceae)  

PubMed Central

Abstract Images are a critical part of the identification process because they enable direct, immediate and relatively unmediated comparisons between a specimen being identified and one or more reference specimens. The Carices Interactive Visual Identification Key (CIVIK) is a novel tool for identification of North American Carex species, the largest vascular plant genus in North America, and two less numerous closely-related genera, Cymophyllus and Kobresia. CIVIK incorporates 1288 high-resolution tiled image sets that allow users to zoom in to view minute structures that are crucial at times for identification in these genera. Morphological data are derived from the earlier Carex Interactive Identification Key (CIIK) which in turn used data from the Flora of North America treatments. In this new iteration, images can be viewed in a grid or histogram format, allowing multiple representations of data. In both formats the images are fully zoomable. PMID:24723777

2013-01-01

266

M¡s Conceptos Err³neos a Evitar en la Ense±anza sobre las Plantas  

NSDL National Science Digital Library

The resource is useful for teacher's professional development by alerting educators to many plant misconceptions in teaching literature. In the thought provoking, peer reviewed resource fifty misconceptions are identified. Some misconceptions are easier to identify because they are oversimplifications, overgeneralizations, or misidentifications. Others are more difficult to identify because they are obsolete concepts and terms or flawed research.

David Hershey (biology education consultant;)

2006-04-01

267

Inhibitory effect of Xenorhabdus nematophila TB on plant pathogens Phytophthora capsici and Botrytis cinerea in vitro and in planta.  

PubMed

Entomopathogenic bacteria Xenorhabdus spp. produce secondary metabolites with potential antimicrobial activity for use in agricultural productions. This study evaluated the inhibitory effect of X. nematophila TB culture on plant pathogens Botrytis cinerea and Phytophthora capsici. The cell-free filtrate of TB culture showed strong inhibitory effects (>90%) on mycelial growth of both pathogens. The methanol-extracted bioactive compounds (methanol extract) of TB culture also had strong inhibitory effects on mycelial growth and spore germinations of both pathogens. The methanol extract (1000??g/mL) and cell-free filtrate both showed strong therapeutic and protective effects (>70%) on grey mold both in detached tomato fruits and plants, and leaf scorch in pepper plants. This study demonstrates X. nematophila TB produces antimicrobial metabolites of strong activity on plant pathogens, with great potential for controlling tomato grey mold and pepper leaf scorch and being used in integrated disease control to reduce chemical application. PMID:24599183

Fang, Xiangling; Zhang, Manrang; Tang, Qian; Wang, Yonghong; Zhang, Xing

2014-01-01

268

The gibberellin-induced, cysteine-rich protein GIP2 from Petunia hybrida exhibits in planta antioxidant activity.  

PubMed

Numerous GAST-like genes have been identified in various plant species. All code for small proteins with a conserved C-terminal region in which 12 cysteines are located in exactly the same positions. We have previously identified five gibberellin (GA)-induced GAST1-like genes in petunia, GIP1-5. GIP2 is expressed in elongating zones, and its suppression in transgenic petunia plants inhibits stem elongation, suggesting a role for the protein in GA-induced cell growth. However, nothing is known about the biochemical activity of GIP2 or any other GAST-like protein. As all contain putative catalytic disulfide bonds (putative redox-active cysteines), we speculated that they might be involved in redox regulation. Expression analysis of GIP2, GIP4 and GIP5 revealed that they are induced by H(2)O(2). To study whether GIP2 modulates H(2)O(2) levels, we generated transgenic petunia plants expressing GIP2 under the regulation of the ubiquitous CaMV 35S promoter. The transgene reduced H(2)O(2) levels in leaves following wounding. It also reduced the levels of H(2)O(2) in guard cells following osmotic stress and ABA treatments, leading to the suppression of stomatal closure. In addition, the transgene promoted stem and corolla elongation. As reactive oxygen species (ROS) are involved in cell elongation, we suggest that GIP2 affects growth by regulating the levels of ROS. As all known GAST-like proteins contain putative redox-active cysteines, they may all act as antioxidants. PMID:17076804

Wigoda, Noa; Ben-Nissan, Gili; Granot, David; Schwartz, Amnon; Weiss, David

2006-12-01

269

Allelic differences in Medicago truncatula NIP/LATD mutants correlate with their encoded proteins transport activities in planta  

PubMed Central

Medicago truncatula NIP/LATD gene, required for symbiotic nitrogen fixing nodule and root architecture development, encodes a member of the NRT1(PTR) family that demonstrates high-affinity nitrate transport in Xenopus laevis oocytes. Of three Mtnip/latd mutant proteins, one retains high-affinity nitrate transport in oocytes, while the other two are nitrate-transport defective. To further examine the mutant proteins transport properties, the missense Mtnip/latd alleles were expressed in Arabidopsis thaliana chl1-5, resistant to the herbicide chlorate because of a deletion spanning the nitrate transporter AtNRT1.1(CHL1) gene. Mtnip-3 expression restored chlorate sensitivity in the Atchl1-5 mutant, similar to wild type MtNIP/LATD, while Mtnip-1 expression did not. The high-affinity nitrate transporter AtNRT2.1 gene was expressed in Mtnip-1 mutant roots; it did not complement, which could be caused by several factors. Together, these findings support the hypothesis that MtNIP/LATD may have another biochemical activity. PMID:23154505

Salehin, Mohammad; Huang, Ying-Sheng; Bagchi, Rammyani; Sherrier, D. Janine; Dickstein, Rebecca

2013-01-01

270

Mutations in the Arabidopsis Peroxisomal ABC Transporter COMATOSE Allow Differentiation between Multiple Functions In Planta: Insights from an Allelic Series  

PubMed Central

COMATOSE (CTS), the Arabidopsis homologue of human Adrenoleukodystrophy protein (ALDP), is required for import of substrates for peroxisomal ?-oxidation. A new allelic series and a homology model based on the bacterial ABC transporter, Sav1866, provide novel insights into structure-function relations of ABC subfamily D proteins. In contrast to ALDP, where the majority of mutations result in protein absence from the peroxisomal membrane, all CTS mutants produced stable protein. Mutation of conserved residues in the Walker A and B motifs in CTS nucleotide-binding domain (NBD) 1 resulted in a null phenotype but had little effect in NBD2, indicating that the NBDs are functionally distinct in vivo. Two alleles containing mutations in NBD1 outside the Walker motifs (E617K and C631Y) exhibited resistance to auxin precursors 2,4-dichlorophenoxybutyric acid (2,4-DB) and indole butyric acid (IBA) but were wild type in all other tests. The homology model predicted that the transmission interfaces are domain-swapped in CTS, and the differential effects of mutations in the conserved EAA motif of coupling helix 2 supported this prediction, consistent with distinct roles for each NBD. Our findings demonstrate that CTS functions can be separated by mutagenesis and the structural model provides a framework for interpretation of phenotypic data. PMID:19019987

Dietrich, Daniela; Schmuths, Heike; Lousa, Carine De Marcos; Baldwin, Jocelyn M.; Baldwin, Stephen A.; Baker, Alison; Holdsworth, Michael J.

2009-01-01

271

Overview of Spanish and Latin American Distance Higher Education.  

ERIC Educational Resources Information Center

Provides a brief overview of Spanish and Latin American distance education programs for higher education and describes the three most important institutions: (1) the Spanish UNED (Universidad Nacional de Educacion a Distancia); (2) the Costa Rican UNED (Universidad Estatal a Distancia); and (3) the Venezuelan UNA (Universidad Nacional Abierta).

Garcia Garrido, Jose Luis

1991-01-01

272

Courtship behavior of different wild strains of Ceratitis Capitata (Diptera: Tephritidae)  

SciTech Connect

This study documents differences in the courtship behavior of wild strains of Ceratitis capitata (Wiedemann) from Madeira (Portugal), Hawaii (U.S.A.), Costa Rica, and Patagonia (Argentina). Some traits showed large variations and others substantial overlaps. The angle at which the male faced toward the female at the moment of transition from continuous wing vibration and intermittent buzzing changed very little during the course of courtship in all strains, but males from Madeira tended to face more directly toward the female than other males. Females tended to look more, and more directly, toward the males as courtship progressed in all strains. The distance between male and female tended to decrease as courtship proceeded in all strains, but the distances at which males initiated continuous vibration, intermittent buzzing, and jumped onto the female were relatively less variable between strains, except for the strain from Costa Rica. Flies of Madeira courted for longer and the male moved his head and buzzed his wings longer than the other strains. (author) [Spanish] Este estudio documenta diferencias en el comportamiento de cortejo de cepas silvestres de Ceratitis capitata (Wied.) provenientes de Madeira (Portugal), Hawaii (Estados Unidos de Norte America), Costa Rica y Patagonia (Argentina). Algunas caracteristicas mostraron grandes variaciones y traslape substancial. Los angulos a los cuales los machos miraron hacia las hembras cambiaron muy poco en el momento de la transicion de la vibracion continua al zumbido intermitente durante el curso del cortejo en todo las cepas, pero los machos de Madeira tendieron a enfrentar mas directamente a la hembra que otros machos. Los angulos de las hembras disminuyeron claramente durante el cortejo en todas las cepas. La distancia entre el macho y la hembra tendio a disminuir conforme el cortejo continuaba en todas las cepas, pero las distancias a las cuales los machos iniciaron la vibracion continua, el zumbido intermitente, y el salto sobre la hembra eran relativamente menos variables entre cepas excepto la cepa de Costa Rica. Moscas de Madeira cortejaron mas tiempo y el macho moviosu cabeza y zumbaba sus alas mas prolongadamente que las otras cepas. (author)

Briceno, D. [Escuela de Biologia, Universidad de Costa Rica, Ciudad Universitaria (Costa Rica); Eberhard, W. [Escuela de Biologia, Universidad de Costa Rica, Ciudad Universitaria and Smithsonian Tropical Research Institute (Costa Rica); Vilardi, J. [Dpto. de Ciencias Biologicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires (Argentina); Cayol, J.-P. [Technical Cooperation Division, IAEA, Wagramerstrasse 5, P.O. Box 100 A-1400, Vienna (Austria); Shelly, T. [A. C. , D. , E. USDA/APHIS/CPHST, 41-650 Ahiki St. Waimanalo, HI 96795 (United States)

2007-03-15

273

La difcil convivencia entre cristianos y musulmanes... Sharq al-Andalus, 13 (1996), pp. 9-26 LA DIFCIL CONVIVENCIA ENTRE  

E-print Network

construcción de una morería real en la locali- dad de Monforte en 1459, a través de la concesión de una carta inten- taron colonizar estas tierras. Esta repoblación contrasta con el fracaso demo- gráfico de la en el siglo XIII, va a llevar la frontera de la cristiandad oc- cidental hasta tierras valencianas y

Escolano, Francisco

274

Prediction uncertainty of plume characteristics derived from a small number of measuring points  

NASA Astrophysics Data System (ADS)

A small number of measuring points may inflict a bias on the characterisation of flow and transport based on field experiments in the unsaturated zone. Simulation of pure advective transport of a Gaussian plume through a setup of 30 regularly placed measuring points revealed regular temporal fluctuations about the real spatial moments. An irregular setup predicted both irregular fluctuations and larger discrepancies from the real value. From these considerations, a regular setup is recommended. Spatial moments were sensitive to the plume size relative to the distance between individual measuring points. To reduce prediction errors of the variance, the distance between the measuring points should be less than twice the standard deviation of the examined plume. The total size of the setup should cover several standard deviations of the plume to avoid mass being lost from the monitored area. Numerical simulations of a dispersing plume (comparing calculations based on 9000 nodes with 30 measuring points) revealed that vertical and horizontal centres of mass were predicted well at all degrees of heterogeneity, and the same was the case for horizontal variances. Vertical variances were more susceptible to prediction errors, but estimates were of the same order of magnitude as the real values. Rsum Lorsque l'on cherche caractriser l'coulement et le transport partir d'expriences de terrain dans la zone sature, il arrive qu'un petit nombre de points introduisent un biais. La simulation d'un transport purement advectif d'un panache gaussien au travers d'un ensemble de 30 points de mesures espacs rgulirement fait apparatre des variations temporelles rgulires autour des moments spatiaux rels. Un ensemble irrgulier conduit prdire la fois des variations irrgulires et de plus grandes divergences par rapport la valeur relle. A partir de ces constations, un ensemble rgulier est recommand. Les moments spatiaux sont apparus sensibles la dimension du panache en fonction de la distance entre les diffrents points de mesure. Afin de rduire les erreurs de prdiction de la variance, la distance entre les points de mesure doit tre infrieure au double de l'cart-type du panache examin. La dimension totale de l'ensemble doit couvrir une tendue de plusieurs carts-types du panache pour viter qu'une partie de la matire chappe la zone surveille. Des simulations numriques du panache en dispersion (les calculs de comparaison sont bass sur 9000 nuds avec 30 points de mesure) montrent que le centre vertical et le centre horizontal de la matire disperse ont t bien prdits tous les degrs d'htrognit, de mme que pour les variances horizontales. Les variances verticales ont t plus sensibles aux erreurs de prdiction, mais les estimations taient du mme ordre de grandeur que les valeurs relles. Resumen Un nmero pequeo de puntos de medida puede producir un sesgo en la caracterizacin en campo del flujo y transporte de solutos en la zona no saturada. La simulacin de transporte advectivo (no difusivo) de un penacho Gaussiano a travs de un conjunto de 30 puntos de medida regularmente distribuidos revelan fluctuaciones temporales regulares de los momentos espaciales del penacho. Una distribucin irregular de puntos de medida predijo a su vez fluctuaciones irregulares, ms alejadas de la realidad, por lo que se recomienda el uso de esquemas de muestreo regulares. Los momentos espaciales fueron sensibles a la relacin entre tamao del penacho y distancia entre puntos de medida. Para reducir los errores en la prediccin de la varianza, la distancia entre puntos de observacin debe ser menor que dos veces la desviacin estndar del penacho. El tamao del rea muestreada debe cubrir varias desviaciones estndar del penacho para evitar perder parte de la masa. Las simulaciones numricas en un penacho dispersivo, comparando los clculos basados en 9000 nudos con las 30 medidas, mostraron que las posiciones de los centros de masa y

French, H. K.; van der Zee, S. E. A. T. M.; Leijnse, A.

275

La fbrica de la inseguridad en Caracas Una leyenda urbana entre necesidad de gestin y  

E-print Network

metrópoles latino-americanas ****** Julien Rebotier jrebotier@hotmail.com CREDAL ­ IHEAL VESPA ­ INRS, cidade e política: perspectivas comparativas quatro metrópoles latino-americanas, São Paulo : Brazil la UCV (Roberto Briceño León) *Centro por la Paz y los DDHH de la UCV (Ana María San Juan) *ONG Paz

Paris-Sud XI, Université de

276

Etude des interactions entre constituants du lait et membranes minrales de microfiltration  

E-print Network

% of total fouling) with a porous structure: aggregation of casein micelles with fat globules in the case'agglomération des micelles de caséines et contenant des globules gras dans le cas d'un lait entier. Nous avons

Paris-Sud XI, Université de

277

Asociacin entre el virus XMRV y enfermedades humanas: preguntas y respuestas  

Cancer.gov

El XMRV es un retrovirus del que se inform por primera vez en 2006 como una causa potencial del cncer de prstata. Est estrechamente relacionado con los virus de leucemia murina, los cuales causan una amplia variedad de cnceres as como enfermedades inmunolgicas y neurolgicas en ratones.

278

32 - EntrEtiEns dE Bichat 2011 d'Orthophonie  

E-print Network

rééducation vocale C. Pillot-Loiseau* * Orthophoniste, Maître de Conférences en Phonétique, chargée d exigeants dans leur prise en charge. Cette évaluation objective sera toujours as- sociée aux autres éléments d'examen du dysodique dans sa globalité (Anamnèse, Index de Handicap Vocal pour les chanteurs

Boyer, Edmond

279

Quelques aspects des interactions hormonales entre la mue et la vitellogense  

E-print Network

, occurs only after normal folliculogenesis. The secondary follicular tissue would secrete vitellogenin stimulating ovarian hormone (VSOH) which stimulates the sub- epidermal adipose tissue to produce vitellogenin vitellogenesis. Moreover, the Y-organ controls vitellogenin entry into the oocytes. In secondary vitellogenesis

Boyer, Edmond

280

La Communicacion entre los Centros de Investigacion en Educacion (Communication among Educational Research Centers).  

ERIC Educational Resources Information Center

In Latin America there is a lack of communication concerning educational research. This lack has been underlined in many regional meetings, but no action has been taken. Possible steps that would lead to improvement include circulation of research summaries, both for completed and current works, efforts by research centers to organize meetings,

Schiefelbein, Ernesto

1972-01-01

281

RELACIN ENTRE NDVI Y CONTENIDO DE METALES EN RHIZOPHORA MANGLE EN EL SUROESTE DE PUERTO RICO  

E-print Network

Marianela Mercado Burgos1 , Ricardo Veguilla2 1 Estudiante Graduado ­ Departamento de Geología 2) Figura 4: Mangle Negro (Avicennia germinans) Mangle Rojo El mangle rojo es uno de las isla. Las otras especies son el mangle blanco, el negro y el botón. Su distribución de acuerdo a su

Gilbes, Fernando

282

Variaes nas frentes de gelo da Enseada Martel, Ilha Rei George, Antrtica, entre 1956 e 2000  

Microsoft Academic Search

Ice masses in subpolar regions may respond rapidly to changes in atmospheric temperature. This study verified variations in ice front positions at Martel Inlet, King George Island, Antarctica, from 1956 to 2000, using maps produced from aerial photogrammetric surveys and satellite imagery. General retreat of ice fronts were observed through four decades, which means that 3.55 km2 of the ice

JORGE ARIGONY NETO; ULISSES FRANZ BREMER; JEFFERSON CARDIA SIMES

283

LES INTERVALLES EXTRMES ENTRE LES MISSIONS RADIOACTIVES. II. Par E. J. GUMBEL.  

E-print Network

longue telle que le polonium. On sait que les rayons actifs décroissent d'après la formule exponen de quelques heures. Le polonium est de préparation facile par évaporation d'une goutte de solution

Paris-Sud XI, Université de

284

L'Egypte entre l'arme et les Frres Marc Lavergne  

E-print Network

, et le demeurent. En effet, dès le lendemain du succès de la journée de la Police, le président réformes réclamées par la jeunesse, et avant tout par la dénonciation de la corruption. L'armée, opaque

Paris-Sud XI, Université de

285

Model-Based Functional Performance Testing of AHU in Kista Entre  

E-print Network

the performance of which was questioned by Vasakronan. Heat recovery from a coil in the return air to a coil in the supply air is done by a liquid-loop. Besides the two coils this loop includes heat exchangers for supply of primary heating and cooling..., respectively. In the supply duct upstream the main coil there is an additional coil that recovers heat from cooling beams and thus provide free cooling (see figure 1). There are conflicts built into this system. The heat recovery by the liquid...

Carling, P.; Isakson, P.

2004-01-01

286

Ms para ellas - Sugerencias para cerrar la brecha entre gneros en las regiones en desarrollo  

Microsoft Academic Search

Segn el pensamiento convencional, la salud y la educacin son factores esenciales para el desarrollo econmico y social: permiten mejorar la distribucin del ingreso y la productividad, y adems, los ms beneficiados son los pobres. Sin embargo, en muchas regiones del mundo no todos los miembros de la sociedad reciben estos servicios equitativamente. En muchos casos las mujeres estn excluidas

Alessandro Magnoli

2005-01-01

287

Dominicanas entre La Gran Manzana y Quisqueya: Family, Schooling, and Language Learning in a Transnational Context  

ERIC Educational Resources Information Center

Drawing from a one-year qualitative research study, this article explores the transnational lives and experiences of three young women and their little sisters in New York with close ties to the Dominican Republic. Using ethnographic research methods--life history interviews, focus groups, participant observation, and document analysis, I examine

Rodriguez, Tracy

2009-01-01

288

Analyse statique des interactions entre structures lmentaires d'une grammaire  

E-print Network

-lès-Nancy, cedex,France guy.perrier@loria.fr R?SUM? Nous nous intéressons ici à la construction semi-automatique de in the semi-automatic construction of computational grammars and in their use for parsing. We consider words of a sentence, whose associated elementary trees are companions, that is, they will necessarily

Paris-Sud XI, Université de

289

Ecologie L'cologie est l'tude des interacons entre  

E-print Network

-1875): du monde staque (créé par Dieu) à un monde dynamique Louis Agassiz (1807-1873): mise en évidence des périodes glaciaires => inié une généraon de découvreurs de l'ordre vivant Carl von Linné 1707-1778 Georges-Louis Leclerc de Buffon (1707

Chave, Jérôme

290

La crise actuelle rvle des tensions fondamentales entre capitalisme et dmocratie. L'orthodoxie occidentale, centre  

E-print Network

'appuyant sur l'oeuvre singulière de Karl Polanyi (1886- 1964) qui a décelé la dérive totalitaire de la société professeur du Conservatoire national des arts et métiers (Cnam), coordinateur européen du Karl Polanyi Socioéconomie et démocratie L'actualité de Karl Polanyi sous la direction de Vicki Birchfield Jérôme Blanc

Halazonetis, Thanos

291

Arnaud SERRY Les transports en mer Noire : vers une nouvelle interface entre UE et CEI  

E-print Network

aujourd'hui par son intérêt en terme de transport maritime et son nouveau positionnement dans l'espace de l'Europe. Un espace en et de transition La mise en place des réseaux de transport trans-européens[2 infrastructures portuaires de l'Ukraine accusent un retard inquiétant. Les ports géor

Paris-Sud XI, Université de

292

PERSPECTIVES DOCUMENTAIRES SUR LES MOTEURS DE RECHERCHE : ENTRE SRENDIPIT ET LOGIQUES MARCHANDES  

E-print Network

instrumentalisation par les moteurs, sa perception liée au niveau d'acculturation socio-technique des usagers, la outils, c'est la question de leur prise en main, de l'acculturation technique qu'ils réclament et de

Boyer, Edmond

293

LES OUTILS DE DIALOGUE ENTRE LES CULTURES : CAS DES FORUMS DE DISCUSSION  

E-print Network

, acculturation. 1 sic_00827439,version1-29May2013 Manuscrit auteur, publié dans "Dans Actes du colloque TICEMED origines nationales, la différence des regards est de nature à produire des phénomènes d'acculturation c

Paris-Sud XI, Université de

294

Discriminacin y redes sociales: Popularidad entre los estudiantes de bachillerato en Argentina  

Microsoft Academic Search

El objetivo de este trabajo es adquirir un mejor entendimiento del fenmeno de la popularidad de compaeros de clase durante la adolescencia y detectar seales de discriminacin. En Argentina, estudiantes de secundaria seleccionan y clasifican a 10 compaeros de clase con los que les gustara formar equipo. Se descubri que los estudiantes fsicamente atractivos y de alto rendimiento acadmico son

Vctor Elas; Lucas Ronconi; Julio Elas

2007-01-01

295

Estudo de associao entre Sndrome de Tourette e genes da via Slit-Robo.  

E-print Network

??Tourette syndrome (TS) is a neuropsichyatric disorder characterized by tics and familiar inheritance. Several research groups are investigating the genetic aspects of TS, however, frequently (more)

Debora Marques de Miranda

2006-01-01

296

Trois bicentenaires : Hume, Condillac, Smith. Adam Smith entre le marginalisme et le marxisme  

Microsoft Academic Search

It is not easy to understand why, and how, orthodox economists who do not believe either in the labor-theory or in the cost-theory of value, continue to favor Adam Smith's Wealth of Nations, but forget such economists as Condillac, whose value theory is nearer to theirs and whose bicentenary we also commemorate.

Grard R. Pelletier

1977-01-01

297

o c t u b r e Un encuentro entre jvenes e investigadores de la  

E-print Network

isótopos estables del agua cambia e imprime una firma característica. La lluvia presenta una firma · Investigando la lluvia con isótopos estables para entender su origen y formación · Misterios de las nubes de! Sandra Delgado, Unidad de comunicación, CCA-UNAM. #12;INVESTIGANDO LA LLUVIA CON IS?TOPOS ESTABLES PARA

Grutter, Michel

298

ERRORES COMUNES SOBRE RELATIVIDAD ENTRE LOS PROFESORES DE ENSEANZA SECUNDARIA1  

Microsoft Academic Search

SUMMARY The limited understanding of the Principle of Relativity and its vague antl ambiguous formulation in most text-books, may be some of the sources of very common misconceptions on explaining this outstanding piece of the 20th century science. To diagnose these misconceptions a general check of many of books was carried out with the results that are expounded in this

ALEMA BERENGUER

299

Comparao entre a Mecnica Relacional e a Relatividade Geral de Einstein  

Microsoft Academic Search

The c oncept of inertia, as formulated by Newton, is presented, as well as two fundamental results he obtained with h is universal l aw of gravitation: the resultant force exerted by a hollow shell on points inside and outside it. These results are used to analyze his famous bucket experiment. Mach's criticisms to the Newtonian formulation of inertia and

ANDR KOCH; TORRES ASSIS

300

Vinculacin Fsica entre Super Cscaras de Hidrgeno Neutro y Formacin Estelar Reciente  

NASA Astrophysics Data System (ADS)

Many of the known galactic HI supershells (SCHI) may have been formed by the combined effects of stellar winds and supernovae explotions. Having most of them dynamic lifetimes of a few times 10^7 yr, these huge structures are likely to outlive the stars that gave rise to them. Hence, these SCHI may be used as fossil records of the Milky Way star formation history. Furthermore, along their evolution SCHI may trigger star formation. In this paper we analyze the genetic link put forward by McClure-Griffiths et al. (2002) between the OB association Cen OB1 and the SCHI GSH305+01-24. From our study we conclude that GSH305+01-24 may not represent a real physical structure. Instead, we believe that this structure is best represented by two unrelated huge HI shells. The role played by Cen OB1 in powering one of these HI shells is unclear for the time being. FULL TEXT IN SPANISH.

Corti, M. A.; Arnal, E. M.

301

Liens entre croissance et paramtres hydriques chez les nuds axillaires d'Hevea brasiliensis  

E-print Network

stressés. eau / micropropagation / Hevea Summary Relations between growth and water parameters symptoms of water stress. water / micropropagation / Hevea INTRODUCTION Les conditions de culture in vitro

Paris-Sud XI, Université de

302

Relacin entre movilidad, funcionalidad y calidad de vida en pacientes con espondilitis anquilosante  

Microsoft Academic Search

ObjectiveAnkylosing Spondylitis (AS) usually conditions the quality of life (QoL) of these patients. Restricted range of motion is one of the characteristics of AS. The aim of this study was to assess the correlation among mobility, functionality, and quality of life in subjects with AS.

C. Fernndez de las Peas; C. Alonso Blanco; A. del Amo Prez; J. C. Miangolarra Page

2006-01-01

303

CONVENIO MARCO DE COOPERACIN CIENTFICA Y TECNOLGICA ENTRE La UNIVERSlT DE SHERBROOKE, (Quebec, Canad)  

E-print Network

deseo de las partes de promover y favorecer la movilidad académica y administrativa; se acuerda lo dos establecimientos en el plano de la enseñanza, de la investigación y de la movilidad de estudiantes interés para los dos establecimientos; d) la movilidad de profesores e investigadores para misiones de

Spino, Claude

304

Relations entre la phosphorylation de molcules amines et leur activit sur l'absorption du calcium  

E-print Network

calcium Sylviane TARDIVEL A. TOURE, Alice DIGAUD, P. FOURNIER EPHE, Physiologie-Métaholisme minéral des the phosphorylation of aminated molecules and their action on calcium absorption. Various amino acids and guanidines in ileal ligated loops, increased intestinal calcium absorption in the rat. L-arginine was effective per os

Paris-Sud XI, Université de

305

Variabilit des phnomnes d'interfrence entre Vicia sativa L. et Avena sativa L.. I. Dynamique  

E-print Network

, increasing the growth of oat, has determined a depressive effect on the growth of vetch. A relationship for light - growth - leafarea profile - leaf area index Introduction Les associations graminées; Variability of the phenomena of interferences between Vicia sativa L. and Avena sativa L. I. Growth dynamics

Boyer, Edmond

306

Amoros sekretuki dena La comparaison entre cette posie et la prcdente Ezkonduien koplak (Lapurdum  

E-print Network

'intensité de l'amour qui frappe celui qui n'est plus lui-même puisque le coeur, centre artxibo-00084558,version ezin iretsi, autant dire, selon l'expression commune, qu'il vit d'amour et d'eau fraîche. Mais cet amour qu'il voue à la gente dame est-il partagé ? C'est bien la question essentielle et non résolue, qui

Boyer, Edmond

307

TUDE EXPERIMENTALE DE L'ECOULEMENT ET DE L'INTERACTION ENTRE DEUX ROTORS CONTRAROTATIFS  

E-print Network

with high specific speeds leads to the design of counter-rotating axial fans. The design of this kind and local unsteady measurements. KEY WORDS: Turbomachinery, axial-flow fan, counter-rotating rotors, design AND THE INTERACTION IN-BETWEEN TWO COUNTER-ROTATING SUBSONIC AXIAL-FLOW FANS Recently, the need for smaller axial fans

308

Relacin fsica entre el cmulo abierto Hogg 15 y la estrella Wolf-Rayet WR 47  

NASA Astrophysics Data System (ADS)

We revise the fundamental parameters of the faint open cluster Hogg 15, for which two recent colour-magnitude diagram (CMD) studies have obtained significantly different ages (Sagar et al. 2001, MNRAS, 327, 23; Piatti & Clari 2001, A&A, 370, 931). In the present study, we combine a series of methods trying to constrain age, together with other fundamental parameters. We employ spatial extractions to construct the CMDs, and the cluster integrated spectrum to compare the latter with those of templates of known age. For Hogg 15 we derive an age of (20 10) Myr, a reddening of (1.10 0.05) mag, and a distance of (3.1 0.5) kpc. We conclude that the estimation of an older age in the study of Piatti & Clari can be accounted for in terms of main sequence/turnoff curvature being blurred in the CMDs, an effect mainly caused by field contamination. To clarify the issue of whether the Wolf-Rayet star HDE 311884 (WR 47), known to be a WN6 + O5V binary system, is associated or not with Hogg 15, we discuss its fundamental parameters, particularly its distance. Based on the WR 47 spectrum and available photometry, we assume that the underestimated distance implied by the Hipparcos parallax (216 pc) is affected by its binary character. By comparing the WR 47 spectrum with those of WR stars of a similar type, we conclude that WR 47 is not affected by a E(B-V) colour excess much higher than that associated with Hogg 15, namely E(B-V) = 1.10. On the basis of the WR 47's resulting distance of (5.2 0.9) kpc, which largely surpasses that of the cluster, we conclude that WR 47 is not related to Hogg 15 from the point of view of origin, since the cluster and the star do not belong to the same formation event.

Piatti, A. E.; Bica, E.; Santos, J. F. C., Jr.; Clari, J. J.

309

Calculs Numeriques des Interactions Entre les Champs Electromagnetiques et les Tissus Biologiques  

NASA Astrophysics Data System (ADS)

The understanding of electromagnetic field effects on health is a very acute problem nowadays. Indeed, the daily landscape is invaded by waves generated by affordable state-of-the-art equipment. It becomes urgent to improve the knowledge in order to ensure the safety of the users and the general public. At high frequencies two areas of concern can be distinguished: cellular telephony and wireless indoor communications. This dissertation is devoted to two aspects of the research in this field i.e. the numerical dosimetry and the biological experimentation. A new formulation for an expanding grid algorithm based upon the FDTD that can be applied, in particular, at high frequencies is presented. The energy deposition and the associated temperature rise in a model of the human eye due to a resonant dipole at frequencies of 840, 915, 1500 and 1800 MHz are then calculated. The duty cycle of each system is then introduced and its impact on temperature elevation is examined. Finally, a methodological approach to standard setting for portable transceivers is proposed. On the experimental aspect, a protocol has been elaborated and an experimentation to study athermal effects of electromagnetic fields at 9.3 GHz has been carried out. In particular, the importance of polarization has been examined.

Mokhtech, Kamel-Eddine

310

Alliance stratgique entre PME et Grande Firme Internationale : Quel rle pour le middle manager ?  

E-print Network

between Small and Medium-sized enterprises and international large-size company: which role for middle manager? Abstract: The internationalization of Small and Medium-sized Enterprises doesn't any more alliances, Small and Medium-sized Enterprises (SME), middle manager, large-size companies (LSC), corporate

Boyer, Edmond

311

Entre Dos Mundos (Between Two Worlds): Bicultural Skills Training with Latino Immigrant Families  

Microsoft Academic Search

This paper focuses on the acculturation model of second-culture-acquisition for Latino immigrants. Two theoretical frameworks,\\u000a assimilation and alternation theories, are compared within the acculturation model. Empirical research findings suggest that\\u000a assimilation is a risk factor for increases in negative health behaviors and mental health problems. Conversely, biculturalism\\u000a appears to be an emerging protective factor that buffers assimilation stress, enhances socio-cognitive

Martica L. Bacallao; Paul R. Smokowski

2005-01-01

312

CONTRASTE DE LA CAPACIDAD DE RESPUESTA A CORREOS ELECTRNICOS ENTRE HOTELES INDEPENDIENTES Y DE CADENA  

Microsoft Academic Search

Differences between the E-mail Response Capability of Independent and Chain Hotels. The article shows the results of the study carried out in Mexico between independent and chain hotels which operate in sun and sea destinations. The aim of the study was to know the capacity and quality of the online services, in this case electronic mail, which the hotels offer

Patricia Dominguez; Stphanie Richert; Ral Castro

313

Relation entre les proprits chimique, cristallographique et lectronique de films de sulfure de cadmium prpars  

E-print Network

de cadmium préparés par pulvérisation réactive F. Dutault et J. Lahaye Centre de Recherches sur la sulfure de cadmium ont été préparés par pulvérisation réactive de chlorure de cadmium et de thiourée. Les préparation et de recuit. Abstract. 2014 Films of cadmium sulfide were prepared by spray of aqueous solution

Paris-Sud XI, Université de

314

Relacin entre las faunas endoparsitas de reptiles y su tipo de alimentacin  

Microsoft Academic Search

Relationships between the reptile endoparasites and its feeding habits.- A comparative study of the endoparasites of several reptile species related to their feeding habits, has been carried out. The results sug- gested a relationship between the kind and number of parasites and the feeding habits of the hosts. Testudo gra- eca, herbivorous reptile, exhibits rich helminth infracommunities. The Pharyngodonidae as

V. ROCA

315

Relacin entre turismo, gnero y sexo. El caso de Buzios - Brasil  

Microsoft Academic Search

The relationship between sex and tourism has followed different paths starting from the Gay \\/ Lesbian friendly market to nudist tourism or prostitution. Not withstanding, there are sill few initiatives to stop this kind of tourism that brings with its huge social problems and scandalizes the public opinion. This is probably due to the fact that from an historic point

Juana A. Norrild

2007-01-01

316

Correlao entre atividade antioxidante e compostos bioativos de polpas comerciais de aa (Euterpe oleracea Mart)  

Microsoft Academic Search

RESUMO. Este trabalho objetivou caracterizar polpas comerciais de aa, alm de correlacionar a contribuio da vitamina C, carotenides totais e compostos fenlicos com a atividade antioxidante desses produtos, verificando ainda os parmetros referentes qualidade dos produtos obtidos. Foram realizadas anlises de pH, acidez total titulvel, slidos solveis totais, acares, cor, atividade de gua, vitamina C, antocianinas totais e carotenides

Gerusa Matias dos Santos; Geraldo Arraes Mai; Paulo Henrique; Machado de Sous

317

LE STATUT JURIDIQUE DU CORPS HUMAIN OU L'OSCILLATION ENTRE L'OBJET  

E-print Network

scientifique et parental, son extinction ne peut qu'être tributaire des technos- sciences qui tendent à une personality after death, on the other. If the acquisition of legal personality is to be considered in relation to assisted procreation, scientific evolution and parental choices, the extinction of personality must

Spino, Claude

318

ENTR 320-001: Principles of Entrepreneurship, CRN 10854 Fall Semester 2013  

E-print Network

. Thousand Oaks, CA: Sage. ISBN 978-1-4129-9265-7 Osterwalder, A., & Pigneur, Y. (2010). Business model the ethical implications of various business strategies and procedures. Innovation and creativity. The reader value creation, rather than the single event of opening a business. Reflecting recent research

Young, Paul Thomas

319

ESTUDIO DESCRIPTIVO CORRELACIONAL ENTRE IRA Y PERSONALIDAD A LA LUZ DE LA TEORA DE HANS EYSENCK  

Microsoft Academic Search

This work presents a theoretical revision regarding the theme of anger , its evaluation and intervention, directly related to aggression and important theories of the personality, focusing -primarily- in Eysenck's theory. Two instruments were used on 200 children of both sexes, within the ages of 9 to 11 years old in three schools in Santaf de Bogot; one of these

Clemencia Montaa de Barragn; Mara Alexandra Acosta; Ruby Maritza Gerena

2002-01-01

320

Relations entre la croissance et le pouvoir pathogne chez Corynebacterium fascians (Tilford) Dowson  

E-print Network

'expression est stimulée par l'addition d'asparagine ou de thiamine, est le plus fort lorsque les bactéries investigated. Maximal pathogenicity was obtained after addition of asparagine or thiamine to the inoculum

Boyer, Edmond

321

Enseando a comprender la naturaleza de la materia: el dilogo entre la qumica y nuestros sentidos  

Microsoft Academic Search

La qumica es una materia tradicionalmente consi- derada difcil por muchos alumnos, que se acercan a esta disciplina como quien se aproxima a una caverna misteriosa llena de secretos slo aptos para iniciados (vestidos con bata blanca y trabajando con extraos aparatos) a los que slo se puede acceder tras grandes esfuerzos y, muchas veces, con la incer- tidumbre de

Miguel ngel Gmez Crespo; Juan Ignacio Pozo; Mara Sagrario; Gutirrez Julin

322

ACERCAMIENTO EPICREO AL ESTUDIO DE LOS NEXOS ENTRE DISCURSO, METFORA Y PULSIN TEORTICA  

Microsoft Academic Search

A travs de una interpretacin poco frecuente de parte de la teora de Peirce e introduciendo as, las disparadores nociones de prcticas y discursos sociales, intentaremos desgranar tres grandes discursos. En este punto, no nicamente intervendran una polmica en redor de la verdad y de lo que pueden ensearnos en Ciencias Sociales, los famosos teoremas de Kurt Gdel, sino tambin

Edgardo Adrin Lpez

2009-01-01

323

LES ECRIVAINS FRANAIS ENTRE CONSCIENCE ET MILITANTISME EUROPEENS (1919-1945).  

E-print Network

patrie ne tournait pas forcément le dos à l'idéal européen, bien au contraire : Ernest Renan, le « père'Etats réunis par l'idée commune de la civilisation », Ernest RENAN, « Deuxième lettre à M. David Strauss, 15

Paris-Sud XI, Université de

324

29.04.2010 1 LA PRECARITE SOUS TOUTES SES FORMES : CONCURRENCE ENTRE  

E-print Network

progressive du marché de l'agroalimentaire, ont mis en concurrence des zones de production 1 Dirty, Dangereous de discerner des sociabilités différentes dans les zones rurales concernées. 1. SALARIAT PRECAIRE de contrats qu'au regard des origines des travailleurs. Dans la zone euro-méditerranéenne, le secteur

Boyer, Edmond

325

"Entre Familia": Immigrant Parents' Strategies for Involvement in Children's Schooling  

ERIC Educational Resources Information Center

Teachers and administrators in schools with large, working-class Latino populations often complain of parents' indifference or lack of involvement in children's schooling because of their low visibility at school events and relatively little face-to-face communication with teachers and school administration. In a series of

Poza, Luis; Brooks, Maneka Deanna; Valds, Guadalupe

2014-01-01

326

agronomie: agriculture and environment Relation entre la vitesse relative de croissance  

E-print Network

of nutrition and two radiation levels) were applied to plants fed with nutrient solution and grown on sand; Study of the relationship between relative growth rate and nitrogen content during lettuce (Lactuca sativa L) growth: effects of nutrient and radiation levels. The relationship between relative growth rate

Paris-Sud XI, Université de

327

agronomie: agriculture and environment Relation entre la vitesse relative de croissance  

E-print Network

to plants fed with nutrient solution and grown in sand in a plastic greenhouse. The level of radiation has; Relation between relative growth rate and nitrogen content during growth in lettuce (Lactuca sativa L). Effects of radiation and temperature. The relation between relative growth rate of fresh matter

Paris-Sud XI, Université de

328

Etude thorique et exprimentale du couplage entre un concentrateur solaire et un rcepteur haute temprature (+)  

E-print Network

concentrator is proposed. The first part of the study concerned a paraboloidal perfect mirror and a faceted furnace are presented and compared with calculated data. Then the temperature profile along the wall transfer inside industrial furnaces using parabolic I.R. lamps. Revue Phys. Appl. 18 (1983) 327-334 JUIN

Paris-Sud XI, Université de

329

New York: Les ecoles entre SURR et STAR (New York: Schools between SURR and STAR).  

ERIC Educational Resources Information Center

Three problems of New York City (New York) schools--overpopulation, low academic standards, violence--are examined, and an effort led by parent and teacher organizations to improve conditions is described. Threatened closings (schools under registration review, SURR) and a program of violence reduction (Straight Talk about Risks, STAR) are noted.

Ueberschlag, Roger

1994-01-01

330

Partage du nickel entre serpentine et brucite au cours de la serpentinisation du pridot  

Microsoft Academic Search

When nickeliferous peridot is submitted to a serpentinisation reaction with formation of brucite, the peridotic nickel is partitioned between the two minerals (serpentine and brucite) with a distribution coefficient K=[(Ni\\/Mg) brucite]\\/[(Ni\\/Mg)] serpentine=1,63 (at 350C and 1 kbar), in favour of brucite.

Alain Perruchot

1973-01-01

331

Conocimiento del dilogo de interaccin entre el microbio y el hospedador  

Microsoft Academic Search

ResumenEl tubo digestivo de los mamferos es mucho ms complejo de lo que se haba supuesto. Una capa nica de clulas epiteliales cubre todo el tubo digestivo, proporcionando de este modo la mxima superficie interfacial con el entorno. El epitelio intestinal es un sensor del entorno luminal, que no slo controla las funciones digestivas, absortivas y secretoras, sino que tambin

Alessio Fasano

2009-01-01

332

N d'ordre 1109 Interactions tritrophiques entre des Brassicaces, des  

E-print Network

'interprétation des données de génétique, et enfin Lucie Mieuzet pour l'apprentissage des techniques de génotypages Henri Carpentier pour le support logistique en serre et sur le terrain. Eric pour les réparations

Paris-Sud XI, Université de

333

Vol. 2, No. 2 CMNS INNovatorS aNd ENtrEprENEurS  

E-print Network

to the university, is a role model for all of us. She demonstrates unwavering integrity, a straightforward approach for the future by making I&E a central aspect of our mission. The college is committed to developing a culture transform ideas to creative actions that generate economic, social or cultural value. The college prides

Lathrop, Daniel P.

334

Avaliao da bioequivalncia entre comprimido convencional e comprimido de desintegrao oral contendo 8 mg de ondansetrona.  

E-print Network

??Ondansetron (1,2,3,9-tetrahydro-9-methyl-3-[2-methyl-1H-imidazol-1yl)methyl]-4H-carbazol-one is the first drug of the class of antagonists selective receptor 5-HT3. It is used in the prevention of nausea and vomiting caused (more)

Yara Popst Armando

2008-01-01

335

Mthode exacte pour le owshop hybride avec machines traitement par batches et compatibilit entre les tches.  

E-print Network

placés dans un moule à une température spécique. La durée de vulcanisation de chaque type de pneu est de vulcanisation, car dès que la presse (machine contenant le moule) est fermée, il n'est plus

Boyer, Edmond

336

Du systme mercantile l'ordre diplomatique : les ambassades entre gypte mamlke et Ymen raslide  

E-print Network

. Ayalon (« Studies on the Transfer of the `Abbasid Caliphate », Arabica, 1960) sera utilement complété par P. M. HOLT, « Some Observations on the Abbasid Caliphate of Cairo », BSOAS, 47 (1984), en part. p

Paris-Sud XI, Université de

337

Cohrence et conversations entre agents : vers un modle bas sur la consonance cognitive  

Microsoft Academic Search

The cognitive dissonance theory is one of the major theory of consistency in psychol- ogy. This papper adapt it to a distributed framework. Then, it shows how this theory could be use to solve common problems and answer critical questions in agent communication theory. Actualy, this theory allow us to define consistency measure wich could help decision making in MAS.

Philippe Pasquier; Brahim Chaib-draa

2002-01-01

338

N d'ordre : 1151 LES PARASITES DE TRADUCTION : ENTRE ADAPTATION  

E-print Network

Antoine FRAILE (Examinateur) Professeur, Université d'Angers ?ric TARAUD (Examinateur) Expert Directeur de CRILA 5 bis, boulevard Lavoisier 49045 Angers Cedex 01 tel-00972046,version1-3Apr2014 #12;1 tel-00972046

Paris-Sud XI, Université de

339

Apoyo a Estudios Geodinamicos con GPS en Guatemala  

NASA Astrophysics Data System (ADS)

El Instituto Geografico Nacional de Guatemala implemento 17 estaciones GNSS en el ao 2009, como un proyecto de credito mixto de donacion de equipamiento del Gobierno de Suiza, el cual, este equipamiento de estaciones CORS GNSS es un sistema de recepcin y transmisin de datos crudos GPS RInex que utiliza la tecnologia Spider Web de Leica, asi mismo este sistema esta sirviendo para el espablecimiento de un marco geodesico nacional de coordenadas geodesicas oficiales, el cual se calculan u obtienen las velocidades en tiempos temporales programados de las 17 Estaciones CORS. La infraestructura del marco geodesico de Guatemala esta sirviendo de base para las aplicaciones de estudios geodinamicos como el monitoreo de del desplazamiento de las placas tectonicas por medio de un estudio que se inicio en el ao de 1999, llamado medicion con GPS el sistema de Fallas de los rios Polochic Motagua de Guatemala, tambien para un estudio que se implemento para deformacin de corteza terrestre local en un Volcan Activo de Guatemala llamado Pacaya. Para el estudio de medicion con GPS en el sistema de falla de los Rios del polochic Motagua se implementaron 16 puntos para medir con GPS de dos frecuencias en el ao de 1999, el cual, tres puntos son estaciones geodesicas CORS IGS llamados GUAT, ELEN y HUEH, despues en el ao de 2003 se hizo otra medicion en un total de 20 puntos, que permiti calcular las velocidades de desplazamieinto de los puntos en mencin, usando como referencia el modelo NUVEL 1A de DeMets de la placa de Norteamerica. Este estudio fue en cooperacin internacional por la universidad de Nice de Francia y el IGNde Francia. Para el estudio del monitoreo con GPS del volcan activo de Guatemala, se implementaron cuatro puntos al rededor del volcan, el cual, se realizan cuatro mediciones al ao, que permiten determinar axialmente la distancias entre los puntos, y rebisar estadisticamente cual es el comportamiento de las distancias en funcion del tiempo, si existen diferencias graduales crecientes o decrecientes, que nos da un indicativo del desplazamiento de la corteza terrestre al rededor del volcan.

Robles, V. R.

2013-05-01

340

Seed development and maturation in early spring-flowering Galanthus nivalis and Narcissus pseudonarcissus continues post-shedding with little evidence of maturation in planta  

PubMed Central

Background and Aims Seeds of the moist temperate woodland species Galanthus nivalis and Narcissus pseudonarcissus, dispersed during spring or early summer, germinated poorly in laboratory tests. Seed development and maturation were studied to better understand the progression from developmental to germinable mode in order to improve seed collection and germination practices in these and similar species. Methods Phenology, seed mass, moisture content and ability to germinate and tolerate desiccation were monitored during seed development until shedding. Embryo elongation within seeds was investigated during seed development and under several temperature regimes after shedding. Key Results Seeds were shed at high moisture content (>59 %) with little evidence that dry mass accumulation or embryo elongation were complete. Ability to germinate developed prior to the ability of some seeds to tolerate enforced desiccation. Germination was sporadic and slow. Embryo elongation occurred post-shedding in moist environments, most rapidly at 20 C in G. nivalis and 15 C in N. pseudonarcissus. The greatest germination also occurred in these regimes, 78 and 48 %, respectively, after 700 d. Conclusions Seeds of G. nivalis and N. pseudonarcissus were comparatively immature at shedding and substantial embryo elongation occurred post-shedding. Seeds showed limited desiccation tolerance at dispersal. PMID:23478943

Newton, Rosemary J.; Hay, Fiona R.; Ellis, Richard H.

2013-01-01

341

Transient Co-Expression of Post-Transcriptional Gene Silencing Suppressors for Increased in Planta Expression of a Recombinant Anthrax Receptor Fusion Protein  

PubMed Central

Potential epidemics of infectious diseases and the constant threat of bioterrorism demand rapid, scalable, and cost-efficient manufacturing of therapeutic proteins. Molecular farming of tobacco plants provides an alternative for the recombinant production of therapeutics. We have developed a transient production platform that uses Agrobacterium infiltration of Nicotiana benthamiana plants to express a novel anthrax receptor decoy protein (immunoadhesin), CMG2-Fc. This chimeric fusion protein, designed to protect against the deadly anthrax toxins, is composed of the von Willebrand factor A (VWA) domain of human capillary morphogenesis 2 (CMG2), an effective anthrax toxin receptor, and the Fc region of human immunoglobulin G (IgG). We evaluated, in N. benthamiana intact plants and detached leaves, the expression of CMG2-Fc under the control of the constitutive CaMV 35S promoter, and the co-expression of CMG2-Fc with nine different viral suppressors of post-transcriptional gene silencing (PTGS): p1, p10, p19, p21, p24, p25, p38, 2b, and HCPro. Overall, transient CMG2-Fc expression was higher on intact plants than detached leaves. Maximum expression was observed with p1 co-expression at 3.5 days post-infiltration (DPI), with a level of 0.56 g CMG2-Fc per kg of leaf fresh weight and 1.5% of the total soluble protein, a ten-fold increase in expression when compared to absence of suppression. Co-expression with the p25 PTGS suppressor also significantly increased the CMG2-Fc expression level after just 3.5 DPI. PMID:21954339

Arzola, Lucas; Chen, Junxing; Rattanaporn, Kittipong; Maclean, James M.; McDonald, Karen A.

2011-01-01

342

The proline 160 in the selectivity filter of the Arabidopsis NO(3)(-)/H(+) exchanger AtCLCa is essential for nitrate accumulation in planta.  

PubMed

Nitrate, the major nitrogen source for plants, can be accumulated in the vacuole. Its transport across the vacuolar membrane is mediated by AtCLCa, an antiporter of the chloride channel (CLC) protein family. In contrast to other CLC family members, AtCLCa transports nitrate coupled to protons. Recently, the different behaviour towards nitrate of CLC proteins has been linked to the presence of a serine or proline in the selectivity filter motif GXGIP. By monitoring AtCLCa activity in its native environment, we show that if proline 160 in AtCLCa is changed to a serine (AtCLCa(P160S) ), the transporter loses its nitrate selectivity, but the anion proton exchange mechanism is unaffected. We also performed in vivo analyses in yeast and Arabidopsis. In contrast to native AtCLCa, expression of AtCLCa(P160S) does not complement either the ?ScCLC yeast mutant grown on nitrate or the nitrate under-accumulation phenotype of clca knockout plants. Our results confirm the significance of this amino acid in the conserved selectivity filter of CLC proteins and highlight the importance of the proline in AtCLCa for nitrate metabolism in Arabidopsis. PMID:20598093

Wege, Stefanie; Jossier, Mathieu; Filleur, Sophie; Thomine, Sbastien; Barbier-Brygoo, Hlne; Gambale, Franco; De Angeli, Alexis

2010-09-01

343

Interaction of VPg-Pro of Turnip mosaic virus with the translation initiation factor 4E and the poly(A)-binding protein in planta  

Microsoft Academic Search

The viral protein linked to the genome (VPg) of Turnip mosaic virus (TuMV) interacts in vitro with the translation eukaryotic initiation factor (eIF) 4E. In the present study, we investigated the consequence of TuMV infection on eIF4E expression. Two isomers are present in plants, namely eIF4E and eIF(iso)4E. Expression of the latter was detected in both TuMV-infected and mock-inoculated Brassica

Simon Leonard; Catherine Viel; Chantal Beauchemin; Nicole Daigneault; Marc G. Fortin; Jean-Francois Laliberte

2004-01-01

344

SECONDARY METABOLITE PRODUCTION BY THE FUNGAL PATHOGEN EUTYPA LATA: ANALYSIS OF EXTRACTS FROM GRAPEVINE CULTURES AND DETECTION OF THOSE METABOLITES IN PLANTA  

Technology Transfer Automated Retrieval System (TEKTRAN)

Eutypa dieback of grapevines is caused by the fungal pathogen Eutypa lata and reduces vineyard longevity worldwide. Early detection could reduce losses due to this disease, so our aim was to identify acetylenic phenol metabolites of E. lata that could prove suitable as chemical markers in an early d...

345

Taxonomic Treatment of Solanum Section Petota (Wild Potatoes) in Catlogo de Plantas Vasculares del Cono Sur (Argentina, Chile, Paraguay, Uruguay, y sur del Brasil)  

Technology Transfer Automated Retrieval System (TEKTRAN)

Solanum section Petota (Solanaceae), which includes the cultivated potato (Solanum tuberosum) and its wild relatives, contains over 150 wild species distributed from the southwestern U.S.A. (38N) to central Argentina and adjacent Chile (41S). This catalog includes all species from the Southern Con...

346

LAS CLASES SE IMPARTIRN EN EL AULA 057, PLANTA BAJA DEL EDIFICIO DEPARTAMENTAL, CAMPUS DE 2013 Horarios Mster en Gestin del Transporte y la Movilidad -Primer cuatrimestre  

E-print Network

VICÁLVARO 2013 Horarios Máster en Gestión del Transporte y la Movilidad - Primer cuatrimestre SEPTIEMBRE 16 sistemas de transporte Infraestructuras de la movilidad Jueves 19 Organización y financiación del transp transporte Infraestructuras de la movilidad Jueves 26 Organización y financiación del transp. Economía

Rey Juan Carlos, Universidad

347

Deteccin del Efecto de un Extracto Vegetal Antimicrobiano Sobre Plantas de Agave (Agave tequilana Weber var. azul) Cultivadas in vitro Utilizando Fluorescencia Inducida por Laser (LIF)  

Microsoft Academic Search

The use of antimicrobial compounds derived from plants is an alternative to avoid o reduce the negative effects that antibiotics have shown on development and growth of plant species in vitro. In this work, the laser-induced fluorescence was used as a non-invasive and non-destructive tool to detect the effect of the addition of the commercial grapefruit extract (citricidal ) on

Eva Noem Obledo-Vzquez; Norma Flores-Verduzco; Jess Cervantes-Martnez; Centro de Investigacin; Asistencia en Tecnologa; Guadalajara Jalisco

2004-01-01

348

This manuscript has been published in Planta (January 12, 2007)1 DOI: 10.1007/s00425-006-0470-22  

E-print Network

exerts a positive effect19 on osmotic protection of fungal cells and favours fungal growth in plant of plant tissues.4 Metabolomic analysis, based on 13 C- and 31 P-NMR spectroscopy, was used to draw up the5 and mannitol were the predominant soluble carbon stores. During9 infection, a decline in sugars and amino acids

Paris-Sud XI, Université de

349

A Robust and Sensitive Synthetic Sensor to Monitor the Transcriptional Output of the Cytokinin Signaling Network in Planta1[C][W][OA  

PubMed Central

Cytokinins are classic plant hormones that orchestrate plant growth, development, and physiology. They affect gene expression in target cells by activating a multistep phosphorelay network. Type-B response regulators, acting as transcriptional activators, mediate the final step in the signaling cascade. Previously, we have introduced a synthetic reporter, Two Component signaling Sensor (TCS)::green fluorescent protein (GFP), which reflects the transcriptional activity of type-B response regulators. TCS::GFP was instrumental in uncovering roles of cytokinin and deepening our understanding of existing functions. However, TCS-mediated expression of reporters is weak in some developmental contexts where cytokinin signaling has a documented role, such as in the shoot apical meristem or in the vasculature of Arabidopsis (Arabidopsis thaliana). We also observed that GFP expression becomes rapidly silenced in TCS::GFP transgenic plants. Here, we present an improved version of the reporter, TCS new (TCSn), which, compared with TCS, is more sensitive to phosphorelay signaling in Arabidopsis and maize (Zea mays) cellular assays while retaining its specificity. Transgenic Arabidopsis TCSn::GFP plants exhibit strong and dynamic GFP expression patterns consistent with known cytokinin functions. In addition, GFP expression has been stable over generations, allowing for crosses with different genetic backgrounds. Thus, TCSn represents a significant improvement to report the transcriptional output profile of phosphorelay signaling networks in Arabidopsis, maize, and likely other plants that display common response regulator DNA-binding specificities. PMID:23355633

Zrcher, Evelyne; Tavor-Deslex, Deborah; Lituiev, Dmytro; Enkerli, Katalin; Tarr, Paul T.; Mller, Bruno

2013-01-01

350

Investigations of the in Planta Expression of Active Cellobiohydrolase I: Cooperative Research and Development Final Report, CRADA Number CRD-07-219  

SciTech Connect

It was the purpose of this project to determine if cellulases produced in transgenic plants could effectively be utilized in the production of ethanol and other feedstock chemicals from lignocellulosic substrates.

Himmel, M.

2011-02-01

351

In planta Protein Interactions of Three Alphacryptoviruses and Three Betacryptoviruses from White Clover, Red Clover and Dill by Bimolecular Fluorescence Complementation Analysis  

PubMed Central

Plant-infecting viruses of the genera Alpha- and Betacryptovirus within the family Partitiviridae cause no visible effects on their hosts and are only transmitted by cell division and through gametes. The bipartite dsRNA genome is encoding a RNA-dependent RNA polymerase (RdRp) and a coat protein (CP). Aside from sequence and structural analysis, the investigation of protein interactions is another step towards virus characterization. Therefore, ORFs of two type members White Clover Cryptic Virus 1 and 2 (WCCV-1 and WCCV-2), as well as the related viruses from Red Clover and Dill were introduced into a bimolecular fluorescence complementation assay. We showed CP-CP dimerization for all tested viruses with localization for alphacryptoviruses at the nuclear membrane and for betacryptoviruses close to cell walls within the cytoplasm. For CPs of WCCV-1 and WCCV-2, deletion mutants were created to determine internal interaction sites. Moreover, RdRp self-interaction was found for all viruses, whereas CP-RdRp interactions were only detectable for the alphacryptoviruses. An intra-genus test of CPs was successful in various virus combinations, whereas an inter-genus interaction of WCCV-1CP and WCCV-2CP was absent. This is the first report of in vivo protein interactions of members in the family Partitiviridae, indicating distinct features of the alpha- and betacryptoviruses. PMID:24113719

Lesker, Till; Maiss, Edgar

2013-01-01

352

Species-specific ITS primers for the identification of Picoa juniperi and Picoa lefebvrei and using nested-PCR for detection of P. juniperi in planta.  

PubMed

Desert truffles, hypogeous Pezizales (Ascomycota), are difficult to identify due to evolutionary convergence of morphological characters among taxa that share a similar habitat and mode of spore dispersal. Also, during their symbiotic phase, these are barely distinguishable morphologically, and molecular probes are needed for their identification. We have developed a PCR-based method for the identification of Picoa juniperi and Picoa lefebvrei based on internal transcribed spacers of rDNA. Two PCR primers specific for P. lefebvrei (FLE/RLE) and two specific for P. juniperi (FJU/RJU) were designed. A collection of samples from different geographical areas representing diversity of these species were examined for unique regions of internal transcribed spacers 1, 2 and 5.8S gene of rDNA (ITS) compared to other closely related species. Annealing temperatures and extension times were optimized for each set of primers for maximum specificity and efficiency. They proved to be efficient to specifically detect the presence of P. juniperi and P. lefebvrei by PCR and neither set amplified purified DNA from other truffle species as well as some ascomycetous fungi. The partial small subunit of ribosomal DNA genes of P. juniperi were amplified with the genomic DNA extracted from Helianthemum ledifolium var. ledifolium roots by nested polymerase chain reaction (PCR) using the universal fungal primer pair ITS1/ITS4 and specific primer pair FTC/RTC, which was designed based on internal transcribed spacer 1, 2 and 5.8S gene of rDNA sequences of P juniperi. The nested-PCR was sensitive enough to re-amplify the direct-PCR product, resulting in a DNA fragment of 426 bp. The efficacy of nested-PCR showed that it could re-amplify the direct-PCR product and detect 200 fg genomic DNA. PMID:24065525

Jamali, Samad; Banihashemi, Zia

2013-10-01

353

Limited impact of abiotic stress on surfactin production in planta and on disease resistance induced by Bacillus amyloliquefaciens S499 in tomato and bean.  

PubMed

Understanding how temperature and water stress affect protocooperation between plants and beneficial rhizobacteria may enhance the efficacy of biocontrol agents in reducing plant diseases. However, little is known about the impact of these factors on biocontrol mechanisms and effectiveness, especially when provided by beneficial Bacillus spp. This work aimed to evaluate the influence of low/high temperature combined with a normal and reduced water regime on the interaction between Bacillus amyloliquefaciens strain S499 and plants, resulting in the induction of systemic resistance (ISR). A reduction in ISR level was observed when plants were subjected to stress before bacterization; however, root treatment with S499 prior to stress exposure attenuated this negative effect. Colonization of S499 during exposure to temperature/water stress allowed the three crops to conserve their overall ability to mount defense lines to a similar degree at all the temperatures tested. Further investigation revealed that relative production of surfactin by S499 was clearly enhanced at low temperature, making it possible to counter-balance the negative effect on traits associated with rhizosphere fitness (colonization, motility, and biofilm formation) observed in vitro in cold conditions. This work thus represents a first step in deciphering the effect of high/low temperatures and/or drought on key plant-microorganism interactions culminating in ISR. PMID:23829709

Pertot, Ilaria; Puopolo, Gerardo; Hosni, Taha; Pedrotti, Lorenzo; Jourdan, Emmanuel; Ongena, Marc

2013-12-01

354

Characterisation of a new reporter system allowing high throughput in planta screening for recombination events before and after controlled DNA double strand break induction.  

PubMed

DNA double strand breaks (DSBs) are created either by DNA damaging reagents or in a programmed manner, for example during meiosis. Homologous recombination (HR) can be used to repair DSBs, a process vital both for cell survival and for genetic rearrangement during meiosis. In order to easily quantify this mechanism, a new HR reporter gene that is suitable for the detection of rare recombination events in high-throughput screens was developed in Arabidopsis thaliana. This reporter, pPNP, is composed of two mutated Pat genes and has also one restriction site for the meganuclease I-SceI. A functional Pat gene can be reconstituted by an HR event giving plants which are resistant to the herbicide glufosinate. The basal frequency of intra-chromosomal recombination is very low (10(-5)) and can be strongly increased by the expression of I-SceI which creates a DSB. Expression of I-SceI under the control of the 35S CaMV promoter dramatically increases HR frequency (10,000 fold); however the measured recombinant events are in majority somatic. In contrast only germinal recombination events were measured when the meganuclease was expressed from a floral-specific promoter. Finally, the reporter was used to test a dexamethasone inducible I-SceI which could produce up to 200x more HR events after induction. This novel inducible I-SceI should be useful in fundamental studies of the mechanism of repair of DSBs and for biotechnological applications. PMID:19136269

Wehrkamp-Richter, Sophie; Degroote, Fabienne; Laffaire, Jean-Baptiste; Paul, Wyatt; Perez, Pascual; Picard, Georges

2009-04-01

355

In planta biocatalysis screen of P450s identifies 8-methoxypsoralen as a substrate for the CYP82C subfamily, yielding original chemical structures.  

PubMed

An in vivo plant screen that allows for the analysis of exogenously applied substrates against transgenic Arabidopsis lines overexpressing individual cytochrome P450s has been developed. By deploying this screen with a subset of 91 P450s, we have identified an original substrate for members of the CYP82C subfamily. The therapeutic compound 8-methoxypsoralen was hydroxylated by plants overexpressing CYP82C2 or CYP82C4, forming 5-hydroxy-8-methoxypsoralen. Additionally, plants further modified this product to create a glycosylated compound, likely the compound 5-O-beta-D-glucopyranosyl-8-methoxypsoralen. The discovery of adducts of therapeutic compounds demonstrates the potential of this biocatalysis screening approach to create compounds that may be of pharmacological value. Additionally, this platform provides a means to expand the general knowledge base of P450 enzyme/substrate combinations and may provide valuable tools for a vast array of biocatalytic and bioremediation processes. PMID:18291319

Kruse, Tanya; Ho, Kwongling; Yoo, Hye-Dong; Johnson, Thomas; Hippely, Matt; Park, Joon-Hyun; Flavell, Richard; Bobzin, Steve

2008-02-01

356

A GFP-based assay to quantify the impact of effectors on the ex planta development of the slowly growing barley pathogen Rhynchosporium commune.  

PubMed

A growth assay was established for the barley pathogen Rhynchosporium commune with EGFP-tagged fungal mutants. This assay was used to study the effect of four antibiotics (hygromycin B, nourseothricin, kanamycin, phleomycin) and a herbicide (phosphinothricin) on fungal development. Fitting the growth curves to the modified Gompertz model allowed calculating growth parameters, such as lag periods of fungal colony formation and mycelial growth rates as well as EC(50) values. Except kanamycin all compounds were efficient inhibitors so that the corresponding resistance-conferring genes can be used as markers for selection of fungal transformation-based mutants. In addition the assay was used to quantify the inhibitory activity of a barley secondary metabolite, the indole alkaloid gramine. PMID:21498556

Kirsten, S; Siersleben, S; Knogge, W

2011-01-01

357

INCIDENCE, AGRESSIVENESS AND IN PLANTA INTERACTIONS OF BOTRYTIS CINEREA ANDOTHER FILAMENTOUS FUNGI QUIESCENT IN GRAPE BERRIES AND DORMANT BUDS IN CENTRAL WASHINGTON STATE  

Technology Transfer Automated Retrieval System (TEKTRAN)

Recovery of quiescent filamentous fungi from non-symptomatic grape berries and dormant buds demonstrated dominance of Alternaria, Aureobasidium, Cladosporium, Ulocladium and other dematiaceous hyphomycetes. Up to 78% of berries contained fungi prior to harvest. Botrytis cinerea was recovered from 0...

358

THE SOUTHWESTERN NATURALIST 51(2):191196 JUNE 2006 NEST SUCCESS OF MOUNTAIN PLOVERS RELATIVE TO  

E-print Network

.Dreitz@state.co.us. ABSTRACT We monitored nest success of mountain plovers (Charadrius montanus) relative to distance from nidificacio´n del chorlo llanero (Charadrius montanus) con relacio´n a la distancia de los bordes antropoge

359

Club de Astronomia de Cimat Segunda Sesion  

E-print Network

; constelaci´on: G´eminis; magnitud 9.2; dimensiones 47"?43"; distancia 4,000 AL; descubridor: William Herschel.8; dimensiones 45"?36"; distancia 1,400 AL; descubridor: William Herschel, 1785. 2. C´umulos M41: Peque~no panal´umulo abierto; con- stelaci´on: Unicornio; magnitud 3.9; di´ametro 20'; descubridor: William Herschel, 1783. M35

Bor, Gil

360

Nematodicidas botnicos no controlo do nemtode-das-galhas-radiculares, Meloidogyne javanica.  

E-print Network

??Dissertao de mestrado em Biotecnologia e Bioempreendedorismo em Plantas Aromticas e Medicinais Muitas das culturas com importncia econmica so afectadas por nemtodes parasitas das plantas. (more)

Silva, Cludia Isabel Couto Arantes Vieira da

2012-01-01

361

Planificacin Neuroquirrgica con Software Osirix  

PubMed Central

Introduccin: La individualidad anatmica es clave para reducir el trauma quirrgico y obtener un mejor resultado. Actualmente, el avance en las neuroimgenes ha permitido objetivar esa individualidad anatmica, permitiendo planificar la intervencin quirrgica. Con este objetivo, presentamos nuestra experiencia con el software Osirix. Descripcin de la tcnica: Se presentan 3 casos ejemplificadores de 40 realizados. Caso 1: Paciente con meningioma de la convexidad parasagital izquierda en rea premotora; Caso 2: Paciente con macroadenoma hipofisario, operada previamente por va transeptoesfenoidal en otra institucin con una reseccin parcial; Caso 3: Paciente con lesiones en pednculo cerebeloso medio bilateral. Se realiz la planificacin prequirrgica con el software OsiriX, fusionando y reconstruyendo en 3D las imgenes de TC e IRM, para analizar relaciones anatmicas, medir distancias, coordenadas y trayectorias, entre otras funciones. Discusin: El software OsiriX de acceso libre y gratuito permite al cirujano, mediante la fusin y reconstruccin en 3D de imgenes, analizar la anatoma individual del paciente y planificar de forma rpida, simple, segura y econmica cirugas de alta complejidad. En el Caso 1 se pudo analizar las relaciones del tumor con las estructuras adyacentes para minimizar el abordaje. En el Caso 2 permiti comprender la anatoma post-operatoria previa del paciente, para determinar la trayectoria del abordaje transnasal endoscpico y la necesidad de ampliar su exposicin, logrando la reseccin tumoral completa. En el Caso 3 permiti obtener las coordenadas estereotxicas y trayectoria de una lesin sin representacin tomogrfica. Conclusin: En casos de no contar con costosos sistemas de neuronavegacin o estereotxia el software OsiriX es una alternativa a la hora de planificar la ciruga, con el objetivo de disminuir el trauma y la morbilidad operatoria. PMID:25165617

Jaimovich, Sebastin Gastn; Guevara, Martin; Pampin, Sergio; Jaimovich, Roberto; Gardella, Javier Luis

2014-01-01

362

Anlisis talla-estructurado de los cambios de abundancia en Merluccius gayi gayi entre 1992 y 2000  

Microsoft Academic Search

The present situation of the Chilean hake (Merluccius gayi gayi) is analyzed for the period between 1992 and 2000 through a length-based stock assessment model. The advantages and disadvantages of the model are analyzed, which consist of a general model of population dynamics structured by age and sex, models for the observations of total annual catches, fishery and survey length

Claudio Gatica; Luis Cubillos

2004-01-01

363

EL IMPACTO DEL CONFLICTO POLTICO SOBRE LAS ORGANIZACIONES DE LA SOCIEDAD CIVIL EN VENEZUELA: EL DILEMA ENTRE PARTICIPACIN Y REPRESENTACIN.  

E-print Network

EL IMPACTO DEL CONFLICTO POLÍTICO SOBRE LAS ORGANIZACIONES DE LA SOCIEDAD CIVIL EN VENEZUELA: EL Universidad Central de Venezuela gomezcal@cantv.net RESUMEN: En los años recientes, la pérdida de legitimidad, conflicto político, Venezuela #12;INTRODUCCI?N En este trabajo intentamos analizar algunos de los impactos

Paris-Sud XI, Université de

364

FORMATION D'UN ISOTOPE STABLE DE MASSE CINQ DE L'HLIUM LORS DES COLLISIONS ENTRE HLIONS ET DEUTERONS  

E-print Network

'action des rayons 03B1 du polonium montre que le rayonnement étudié se compose de deutérons et de protons rayons 03B1 du polonium. Les courbes d'absorption résultant de ces expériences ont confirmé entièrement particules a du polonium, ont constaté que dans ces conditions on n'observe pas de projections de neutrons

Paris-Sud XI, Université de

365

Anlise comparativa entre os anestsicos locais Articana 4% e Prilocana 3% na extrao de terceiros molares retidos em humanos  

Microsoft Academic Search

Comparative analysis between the local anesthesics Articaine 4% and Prilocaine 3% on human third molar removals. The local anesthesics are the most used drugs in Dentistry. They are frequently used in surgery, because pain has been described as an unpleasant experience, both on sensorial and psychological levels. The aim of this study was to obtain further knowledge about articaine 4%

Fausto Rodrigo Victorino; Aparecido Neri Daniel; Liogi Iwaki Filho; Edevaldo Tadeu Camarini; Josmar Mazucheli; ngelo Jos Pavan

2004-01-01

366

Contribution l'analyse des inter-relations entre activits humaines et variabilit climatique : cas du Sud forestier ivoirien  

NASA Astrophysics Data System (ADS)

The South Ivorian Forest has suffered a large rainfall deficit for 25 years. At the same time, it has been noticed that the movement of the coffee and cocoa production seems concomitant with that of the isohyets during recent decades. The variations in albedo and rainfall gradient seem to be linked to the significant changes to the forest cover. These could affect precipitation locally.

Yao, Tlsphore Brou; Servat, Eric; Paturel, Jean-Emmanuel

1998-12-01

367

Manuscrit auteur, rfrence : Pochet P., Corget R. (2010), Entre "automobilit", proximit et sdentarit, quels modles de mobilit  

E-print Network

recherche du MEEDDM au Laboratoire d'Economie des Transports, Université de Lyon (ENTPE, Université Lyon 2, CNRS) Pascal.Pochet@entpe.fr Rémi Corget, Ingénieur des Travaux Publics de l'Etat au CETE de and mobility appear to be very different among the groups of old persons. They also show the risks

Paris-Sud XI, Université de

368

Catlicos, fidelidade conjugal e AIDS: entre a cruz da doutrina moral e as espadas do cotidiano sexual dos adeptos1  

PubMed Central

Neste artigo discutimos a viso da Igreja Catlica sobre sexualidade na interface com a epidemia do HIV/AIDS. Nossa reflexo est embasada em pesquisa etnogrfica que envolveu dois meses de observao participante do cotidiano de catlicos de um bairro popular da Regio Metropolitana do Recife, alm de contar com entrevistas a onze dos leigos engajados nos servios religiosos da igreja do bairro e a oito sacerdotes que realizam seus trabalhos religiosos em outras localidades. Nelas abordamos diferentes temticas relacionadas ao enfrentamento da epidemia da AIDS. Nesse contexto, conjugalidade e fidelidade se afiguram como importantes analisadores de como aqueles lidam com a epidemia, em uma variedade de re-descries prticas e de re-interpretaes conceptuais das assertivas do discurso moral religioso ainda que, muitos impasses permaneam em aberto em termos das prerrogativas da Igreja e seus possveis rebatimentos na sade sexual dos adeptos. PMID:21765650

Rios, Luis Felipe; de Aquino, Francisca Luciana; Muoz-Laboy, Miguel; Oliveira, Cinthia; Parker, Richard

2009-01-01

369

Diferencias biomtricas entre dos poblaciones de Mirlo Acutico (Cinclus cinclus) en ambas vertientes de sierras del Sistema Central  

Microsoft Academic Search

En aquest treball es realitza una anlisi de la biometria de la merla d'aigua en dues localitats del Sistema Central. S'analitzen les dades de 19 merles d'aigua de las Cruceras (altitud 880 m, vila) i 15 de Galndez (altitud 1.060 m, Segovia). Els mascles de Galndez van tenir una ala significativament ms llarga que els de las Cruceras. No es

Alfonso Villarn; Juan Pascual-Parra; Eduardo T. Mezquida

2001-01-01

370

Correlaes genticas entre dimetro de fibras musculares e caractersticas de qualidade de carne em uma linhagem macho de frangos1  

Microsoft Academic Search

Data from a broiler selection program were used to estimate the genetic correlation for muscle fibers diameter and meat quality traits. Genetic correlation was estimated by restricted maximum likelihood method, using the software MTDFREML, with relationship matrix with 77.474 animals. Estimate of genetic correlation among muscle fiber diameter and a* (color parameter - redness) was 0.40 and between diameter and

Andrezza Maria Felcio; Jos Bento Sterman Ferraz; Jlio Csar de Carvalho; Joanir Pereira Eler; Elisngela Chicaroni de Mattos; Jane Lara Brandani; Marques Grosso; Leila de Genova Gaya; Cristina Tschorny Moncau; Maria Elisa Bueno da Silva; Rodrigo Mller de Souza

371

PEIRCE E A CINCIA DA INFORMAO: consideraes preliminares sobre as relaes entre a obra peirceana e a organizao da informao  

Microsoft Academic Search

The interdisciplinary relationships of the information science with Charles Sanders Peirces work (1839-1914) are still little explored. The contributions of the theory of signs in the information science, specifi- cally in the processes, instruments and products of the information organization, they fall back upon the expla- nations of the structuralist semiology and linguistics. The research is a theoretical study that

Carlos Cndido de Almeida; Jos Augusto Chaves Guimares

372

Interdpendance entre la composition en acides amins du grain de seigle et son taux d'azote  

E-print Network

content of rye grain. The amino-acid composition of 13 samples of rye grains was determined. The samples plus aspartate and decreasing for all other amino acids. Thus lysine and tryptophan in rye protein were phenotype. Therefore simply knowing N enables one to predict the amino-acid composition of any rye grain

Paris-Sud XI, Université de

373

Coopration scientifique internationale Renforcement de la coopration scientifique entre l'IRD et les autorits scientifiques malgaches  

E-print Network

développement (IRD), se rendra à Madagascar, accompagné d'une délégation scientifique de l'IRD. Ce déplacement, inaugurée à La réunion en octobre 2012. Contacts presse et informations pratiques IRD Madagascar : Noly@ird.fr | T : + 33 (0)4 91 99 94 87 Pour en savoir plus L'IRD à Madagascar : Présent à Madagascar depuis 1947, l

374

LIBERAO DE MACRONUTRIENTES DE RESDUOS DO CONSRCIO ENTRE MUCUNA PRETA E MILHO SOB SISTEMA ORGNICO DE PRODUO  

Microsoft Academic Search

-1 in no till system and conventional system respectively. At the end of the first month after the litter bags field installation, about 42% of the mucuna + corn initial dry mass still remained in the field with no till system and about 45% in conventional system; approximately 75% of N in no till system and 70% in conventional system,

CELESTE QUEIROZ ROSSI; RAFAELA ELOI DE ALMEIDA ALVES; PEDRO RAPHAEL TERRA FERNANDES; MARCOS GERVASIO PEREIRA; RAUL DE LUCENA; DUARTE RIBEIRO; JOS CARLOS POLIDORO

2008-01-01

375

Modelisation de l'interaction entre une impulsion laser ultrabreve et une nanostructure plasmonique en milieu aqueux  

NASA Astrophysics Data System (ADS)

There is still a limited understanding of the basic mechanisms and processes triggered by laser irradiation that lead to the damaging of the surrounding structures. In particular, there exists for the moment no complete modelling of the process that includes all potential sources of cellular damage, including temperature rise, plasma generation, pressure wave emission and vapor bubble formation. This thesis presents such a modelling, with the cell environment emulated by a much simpler aqueous medium. Water is used as its optical, mechanical and thermal characteristic are similar enough to the cell environment to enable the transposition of the results and tendencies observed in water to this medium. Modelling consists in a continuous medium based approach that uses coupled partial differential equations to simulate the nanostructure-water system's response to an ultrafast laser pulse. The time-dependant field distribution in the system is simulated using classical electromagnetic theory, while the temperature in the nanostructure is calculated using a two-temperature model. Generation and heating of a plasma in the nanostructure's vicinity from photoionization and impact ionization in the near-field, as well as from photothermal emission from the nanostructure at the metal interface are also included. This plasma locally modifies the refractive index, which alters the simulated optical response of the system. Energy relaxation from this plasma as well as heat conduction from the nanostructure's lattice transfer energy to the water, which dynamics and thermodynamics evolutions are simulated from hydrodynamic and energy conservation equations. Modelling is used for analyzing the interaction of a near-infrared ultrafast laser pulse (45 fs, 800 nm, 200 mJ/cm2) with two distinct systems : a 100nm gold nanoparticle and a 10x41 nm2 gold nanorod. The gold nanoparticle shows a plasmon resonance at a 550 nm wavelength, and is thus slightly off-resonance at the 800 nm irradiation wavelength. In opposition, the gold nanorod shows a plasmon resonance directly at 800 nm and is thus in-resonance at the irradiation wavelength. The system of tightly coupled time-dependant non-linear partial differential equations is solved in 3D using a finite-element method. The modelling shows the generation of vapor bubble around both systems, which maximal diameter and growth time are validated from spectroscopic measurements. Results show an important production of plasma in the nanostructure's near field, which fast relaxation heats rapidly the surrounding water, leading to the emission of strong pressure wave and to the formation of a vapor bubble. Simulations further demonstrate the crucial importance of the plasma in the cavitation mechanism. For both the nanoparticle and the nanorod, results show that most of the laser energy is indeed absorbed in the plasma surrounding the nanostructure rather than in the nanostructure itself. In particular, the energy absorbed in the nanoparticle is shown to be insufficient to induce the formation of a vapor bubble at 200 mJ/cm2, whereas such a bubble is experimentally observed. This is a major result of the thesis, as such a plasma-mediated plasmonic enhanced cavitation mechanism has never been reported in the literature. The existence of this plasma-mediated mechanism that does not rely on the particle extreme heating to initiate cavitation has important consequences on cell nanosurgery applications. Finally, based on the same modelling, we develop a simple and efficient method to evaluate the potential of specific nanostructures and irradiation parameters for cell nanosurgery. We introduce a performance factor based on minimizing the energy density deposited in the nanostructure to avoid fragmentation, while maximizing the overall energy deposited in the system, to enhance the production of vapor bubbles. Results predict off-resonance 175 nm gold nanoparticles to be best suited for near-infrared ultrafast laser cell nanosurgery using 45 fs pulses at a wavelength of 800 nm. They also confirm the low inte

Boulais, Etienne

376

Os trajetos do xtase dissidente no fluxo cognitivo entre homens, folhas, encantos e cips: uma etnografia ayahuasqueira nordestina.  

E-print Network

??O fenmeno ritual da bebida xamnica ayahuasca revela inmeras potencialidades msticas, afetivas e culturais. Nossas urbes contemporneas elaboram distintas configuraes diante do alcance divinal promovido (more)

Wagner Lins Lira

2009-01-01

377

APLICACIN DEL MTODO DE INFILTRACIN DE GREEN-AMPT CON REDISTRIBUCIN DE HUMEDAD DEL SUELO ENTRE ENCHARCAMIENTOS  

Microsoft Academic Search

An infiltration and redistribution model based on the modified Green and Ampt equation and a redistribution scheme based on the methodology described by Ogden and Saghafian (1997) was tested. The infiltration and redistribution processes are crucial not only in the hydrological dynamics of the system, but in the ecological dynamics as well; therefore it is necessary to accurately model these

R. Muoz-Carpena; L. Gowdish

378

lence par un facteur 10 30 (Prhaud et al, 1988). Certaines d'entre elles sont situes dans  

E-print Network

et al, 1984). Ces mutants peuvent aider à comprendre le rôle que joue éventuellement ce récepteur, Speicher DW (1984) Amino-acid sequence similarity be- tween rabies virus glycoprotein and snake venom curaremimetic neurotoxins. Science 226, 847-848 Préhaud C, Coulon P, Lafay F, Thiers C, Fla- mand A (1988

Boyer, Edmond

379

La prdisposition la recherche d'expriences comme caractristique individuelle : un lment de la complmentarit entre thorie classique  

E-print Network

fondements cognitiviste et behavioriste ont longtemps dominé les recherches en marketing (Cova et Cova, 2002 Lebrun, 2004), soit par l'expérience d'anticipation (Carù et Cova, 2006), soit par une prédisposition

Boyer, Edmond

380

Les rapports entre le Parlement et le Prsident en France: une volution de la nature du rgime politique?  

Microsoft Academic Search

As the reform of French institutions is currently once again open to question, both in terms of legal doctrine and in political discourse, this article considers the issue of the nature of the French political regime established by the Constitution of 1958. Although the regime has been subject to many changes, it is worthwhile to recall the true nature, in

PASCAL TOUHARI

2008-01-01

381

La expansin del arndano en Entre Ros, Argentina: Alcances e implicancias del aprovechamiento de un sistema productivo regional preexistente1  

Microsoft Academic Search

Grupo 28. Complejos agroindustriales y globalizacin agroalimentaria Abstract The expansion of fruit and vegetable production in less developed countries, orientated to counter-seasonal markets, has been considered as a hallmark of growing food globalization and the prevalence of new forms of private regulation of these markets. This paper is focused on the features of blueberry production in one of the main

Clara Craviotti; Carlos Cattaneo

382

Nouvelle solution analytique pour l'tude de l'interaction hydraulique entre les tunnels alpins et les eaux souterraines  

E-print Network

addresses two major problems encountered during tunnel drilling and related to the hydraulic interaction analytical solution for the study of hydraulic interaction between Alpine tunnels and groundwater Key words

Paris-Sud XI, Université de

383

Note de recherche. Une estimation du lien entre forme urbaine et choix modal. Le cas de six aires urbaines franaises  

Microsoft Academic Search

Taking into account sustainable development for urban planning has led to question the interaction between urban form and daily mobility. The theory of the three types of city establishes that the available transport technology is a force which shapes the city (Walking City, Transit City, and Automobile City). Such an hypothesis constitutes a pertinent theoretical framework to explain

Guillaume POUYANNE

2007-01-01

384

Adolescences, entre dfiance et confiance, Casanova R., Vulbeau A. eds. Presses Universitaires de Nancy, sous Nicole BIAGIOLI  

E-print Network

adolescents d'Harry Potter. Résumé La série Harry Potter fait partie de la culture mondiale des préadolescents- adolescent Harry Potter's readers: Abstract J. K. Rowling's Harry Potter is part of world teen-aged culture, competence #12;2 La série Harry Potter (Rowling, 1997-2006) appartient à la culture mondiale des

Paris-Sud XI, Université de

385

Situ entre Nouadhibou et Nouakchott, le golfe d'Arguin s'ouvre sur l'ocan Atlantique,  

E-print Network

goudronnée Limite PNBA Herbiers marins Mangrove Cordon dunaire Escarpements rocheux Sebkha Golfe d from fishing and nomadic herding. Town PNBA Village Tarmac road PNBA boundary Sea grass beds Mangrove

386

Entre a utopia e o ceticismo: as potencialidad es do s dirios virtuais no mercado de comunicao nacional  

Microsoft Academic Search

Resumo Os dirios virtuais so elementos-chave para compreender como se articulam as profecias otimistas e pessimistas em consequncia da emergncia de novas mdias e formatos no mercado de comuni cao nacional. Sob a tica da remediao , apresentam- se como uma alternativa unilateralidade imposta pelos meios tradicionais ao introduzirem uma narrativa expressiva similar ao jornalismo literrio aportada no ambiente

Mariana Della; Dea Tavernari

387

Les clauses environnementales dans les accords de libre change entre pays dvelopps et pays mergents -Analyse des dterminants  

E-print Network

émergents - Analyse des déterminants Arslan Tariq RANA1 et Philippe SAUCIER2 Résumé: En s'appuyant sur la11 1 Université d'Orléans / LEO, arslan-tariq.rana@etu.univ-orleans.fr 2 Université d'Orléans / LEO

Boyer, Edmond

388

Entre el Renacimiento y el Nuevo Mundo: Vida y obras de Hernan Perez de Oliva (1494?-1531)  

ERIC Educational Resources Information Center

Hernan Perez de Oliva (1494?-1531) was a learned Spanish humanist who wrote his major works in the decades following the discovery of America. By articulating events of his career and literary life, my goal is to comprehend his contributions to the early literary production regarding the newly-found Americas. The thesis consists of three parts.

Pellus Perez, Elena

2012-01-01

389

Entre l'thique et l'esthtique: sduction et prface de roman dans la premire moiti du XVIIIe sicle  

Microsoft Academic Search

En 1979, Claude Reichler et Jean Baudrillard taient de ceux qui s'efforaient dgager les caractristiques constantes du discours sducteur, et ce en dehors de tout dcoupage diachronique. Shoshana Felman et, plus rcemment, Pierre Hartmann ont marqu les tapes menant de l'identification d'un discours sducteur subversif vers une approche historique de la sduction dans la littrature. Dans des proportions diffrentes,

Mladen Kozul; Jan Herman

2002-01-01

390

Entre le dbat et le banal : les mariages religieux des couples du mme sexe aux tats-Unis  

E-print Network

, Coming out in Christianity : Religion, Identity, and Community, Bloomington (IN), Indiana University dénomination est « fundamentalist » selon Laud Humphreys, c'est du « fundamentalism minus homophobia » d'après un article du magazine protestant progressiste le Christian Century, c'est une « conservative church

Paris-Sud XI, Université de

391

Investigation des correlations existant entre la perception de qualite audio et les reactions physiologiques d'un auditeur  

NASA Astrophysics Data System (ADS)

Les tests d'ecoute subjectifs permettent d'evaluer la fiabilite de reproduction des systemes de codage audio (codecs). Le projet presente ici vise a evaluer la possibilite d'utiliser les reactions physiologiques (activite electrodermale, cardiaque, musculaire et cerebrale) a la place d'une note donnee par l'auditeur, afin de caracteriser la performance d'un codec. Ceci permettrait d'avoir une methode d'evaluation plus proche de la perception reelle de qualite audio du sujet. Des tests d'ecoute mettant en oeuvre des degradations audio bien connues en concours avec la mesure des reactions physiologiques ont ete realises pour 4 auditeurs. L'analyse des resultats montre que certaines caracteristiques physiologiques permettent d'avoir une information fiable sur la qualite audio percue, et ce de maniere repetable pour pres de 70% des signaux audio testes chez un sujet, et pres de 60% des sequences audio testees chez tous les sujets. Ceci permet de postuler sur la faisabilite d'une telle methode d'evaluation subjective des codecs audio. Mots-cles : test d'ecoute subjectif, evaluation des codecs audio, mesures physiologiques, qualite audio percue, conductance electrodermale, photoplethysmographie, electromyogramme, electroencephalogramme

Baudot, Matthias

392

Quid Hinieldus cum Christo : a obra de J.R.R. Tolkien como mediao entre paganismo e cristianismo germnicos  

Microsoft Academic Search

Tolkien's fictional works, comprising mainly Middle-earth 's legendarium , are a unique blend of Western Europe's pagan mythologies and a Weltanschaung that is essentially monotheistic and Christian. It is conceivable that the reason for such an unusual m ix derives from Tolkien's profound knowledge of the Anglo-Saxon literary tradition, in which, as in Ce ltic Christendom, there was a reluctance

Reinaldo Jos Lopes

393

L'Amrique, entre rve et dignit Essai sur la rcriture d'une mmoire urbaine en Afrique du Sud  

E-print Network

of landscapes or urban planning: planning practices and concepts were even imported to South Africa from that Sophiatown, though a model in urbanity and an urban reference in the new South Africa, does not inform recent dynamics in post-apartheid cities. They mirror another American model, Mike Davis' City of Quartz. Keywords

Paris-Sud XI, Université de

394

RELACION ENTRE FUNCION Y FORMA CRANEOFACIAL. MEDICIONES DE LABIO Y LENGUA EN SUJETOS NORMALES Y CON EXCESO VERTICAL  

Microsoft Academic Search

1 Odontloga CES; 2 Odontlogo Ortodoncista, M.Sc., Director del rea de investigacin en Fisiologa Oral, CES; 3 ABSTRACT. Johnson N, Jimnez ID, Bermdez JA. Relation between function and craniomandibular form; lip and tongue measurements in normal subjects and with vertical excess. CES Odont 1997; 10: This study is part of a macro investigation that recorded respiration, electrical muscle activity, occlusal

Ingeniero Mecnico

395

RELAO ENTRE O RELEVO E AS CLASSES TEXTURAIS DO SOLO NA MICROBACIA HIDROGRFICA DE VACA BRAVA, PB  

Microsoft Academic Search

The disorderly occupation and intensive use of soil in the Paraba State semi arid land, has resulted in an elevation in the levels of degradation of the environment, as much for the loss biodiversity as for increase in soil erosion. To eva luate the intensity of these processes, a watershed in Vaca Brava was chosen, presenting a strong contrast between

Lus Freire

396

L'idologie des projets urbains. L'analyse des politiques urbaines entre prcdent anglo-saxon et "dtour"  

E-print Network

: gouvernance, idéologie, Marseille, planification, politiques urbaines, projet, Turin. Abstract : The ideology". The ideology underlying the adoption by urban policymakers of instruments such as urban projects or city to the neo-liberal ideology. But, by looking at Italian project experiences, one can discover that the resort

Paris-Sud XI, Université de

397

tude exprimentale et modlisation d'une prcipitation avec agglomration entre cristaux de morphologies diffrentes : application au molybdate de strontium.  

E-print Network

??L'tude exprimentale effectue sur la prcipitation du SrMoO4 a montr qu'il prsente plusieurs morphologies (bipyramide et fuseaux) possibles sous forme d'agglomrats multichelles. Les paramtres opratoires: (more)

Dos Santos Nicolau Esteves Cameirao, Ana Alexandra

2007-01-01

398

DISCRIMINACIN SAlARIAl EN ARGENtINA ENtRE NAtIVOS y PARAGUAyOS  

Microsoft Academic Search

This paper analizes wage differences between migrants from Paraguay and natives from Argentina following Oaxaca's proposal. This methodology allows to make a decomposition of this gap in two factors: those origined in individual characteristics (that generate different pro - ductivity) and the estimated effects of discrimination (people with similar characteristics but receive different salary). The estimations are made under two

Victor Eduardo Torres; Dora Estela Celton

2009-01-01

399

LIDERES POLTICOS INDGENAS EN AMAZONIA: POLTICA Y AUTO-REPRESENTACIN ENTRE LOS YE'KWANA DEL ALTO ORINOCO  

Microsoft Academic Search

This article examines the rise of an indigenous leader among the Ye'kwana of Southern Venezuela in order to analyze indigenous identity politics in the region. Because of extraordinary circumstances that created a municipality in the Upper Orinoco populated exclusively by indigenous people, the Ye'kwana now have the ability to elect indigenous representatives to public office. These new Ye'kwana political leaders

Matthew Lauer

2005-01-01

400

REVUE DE PHYSIQUE APPLIQUESupplment au Journal de Physique NERGIE DE LIAISON ENTRE ATOMES DE SOLUT ET DISLOCATIONS  

E-print Network

SOLUT? ET DISLOCATIONS DANS LES ALLIAGES DILU?S ALUMINIUM-ZINC ET ALUMINIUM-MAGN?SIUM Par J. PEREZ, P on dilute Al-Zn and Al-Mg alloys in an attempt to determine the value of the binding energy for zinc and magnesium solute-atoms to dislocations. The measurements have been made at temperatures ranging from 90 °K

Paris-Sud XI, Université de

401

Presencia de Walt Whitman en la poesia de Pablo Neruda: la relacion entre Hojas de Hierba y Canto General  

E-print Network

, sonaba con realizar una sociedad igualitaria en la cual todos los ciudadanos contaran con libre acceso al mercado y al sistema politico; sin embargo, corno la critica observa, el sueno se volvio pesadilla con la corrupcion politica y economica del... siglo XIX. En su ensayo "Perspectivas democraticas (Democratic Vistas) Whitman comento la corrupcion pervasiva que se difundia por toda la sociedad durante la segunda mitad del siglo XIX: ". . . society, in these States, is cankered, crude...

Rios, David Joel

1999-01-01

402

Importancia de las plantas medicinales en el autocuidado de la salud en tres caseros de Santa Ana Trujillo, Venezuela. The importance of medicinal plants in health care in three small villages of the Santa Ana county at Trujillo state, Venezuela  

Microsoft Academic Search

In order to gather some information about the importance of medicinal plants in the primary health care, the use of plants in three small villages of the Santa Ana county, Pampn municipality at Trujillo State, Venezuela, was quantitatively analyzed. To do this, a local epidemiology diagnosis was carried out and the etnopharmacological information obtained was recorded using the TRAMIL survey.

TEOLINDA CARRILLO-ROSARIO Y GLENDA

403

Universidad Simn Bolvar, Edif. Energtica, Planta Baja. Valle de Sartenejas, Baruta, Caracas, Edo. Miranda, Venezuela, 89000 Telef.: 58 212 906-3708 / 3709 / 3710 / 3711 Fax: 58 212 906-3712 www.ulab.usb.ve  

E-print Network

. Miranda, Venezuela, 89000 Telef.: 58 212 906-3708 / 3709 / 3710 / 3711 Fax: 58 212 906-3712 www siguiente: Universidad Simón Bolívar Valle de Sartenejas Baruta; Edo. Miranda, 1080 Venezuela Cód. Doc.: UL

Vásquez, Carlos

404

Liberacin\\/mineralizacin de nitrgeno en hojarasca de Eucalyptus grandis y leguminosas herbceas, su relacin con la calidad fsica y qumica del residuo y su efecto sobre el crecimiento de plantas jvenes de eucalipto  

Microsoft Academic Search

Resumen El tipo de cosecha y manejo de residuos inciden en el contenido de nutrientes del suelo y la productividad forestal. Estos residuos contienen la mayora del retorno de N. La velocidad de provisin de nutrientes por la descomposicin\\/mineralizacin puede verse afectada por la calidad qumica y fsica como por la localizacin y contacto de los residuos con el suelo.

Alcaraz Maria Luciana

405

In-planta detection and monitorization of endophytic colonization by a Beauveria bassiana strain using a new-developed nested and quantitative PCR-based assay and confocal laser scanning microscopy.  

PubMed

Beauveria bassiana strain 04/01-Tip obtained from larvae of the opium poppy stem gall Iraella luteipes endophytically colonizes opium poppy plants and protect it against this pest. Development of a specific, rapid and sensitive technique that allows accurately determining the process and factors leading to the establishment of this strain in opium poppy plants would be essential to achieve its efficient control in a large field scale. For that purpose in the present study, species-specific primers that can be used in conventional or quantitative PCR protocols were developed for specifically identification and detection of B. bassiana in plant tissues. The combination of the designed BB.fw/BB.rv primer set with the universal ITS1-F/ITS4 primer set in a two-step nested-PCR approach, has allowed the amplification of up to 10fg of B. bassiana. This represented an increase in sensitivity of 10000- and 1000-fold of detection than when using the BB.fw/BB.rv primers in a single or single-tube semi-nested PCR approaches, respectively. The BB.fw and BB.rv primer set were subsequently optimized to be used in real time quantitative PCR assays and allowed to accurately quantify B. bassiana DNA in different plant DNA backgrounds (leaves and seeds) without losing accuracy and efficiency. The qPCR protocol was used to monitor the endophytic colonization of opium poppy leaves byB. bassiana after inoculation with the strain EABb 04/01-Tip, detecting as low as 26fg of target DNA in leaves and a decrease in fungal biomass over time. PCR quantification data were supported in parallel with CLMS by the monitoring of spatial and temporal patterns of leaf and stem colonization using a GFP-tagged transformant of the B. bassiana EABb 04/01-Tip strain, which enabled to demonstrate that B. bassiana effectively colonizes aerial tissues of opium poppy plants mainly through intercellular spaces and even leaf trichomes. A decline in endophytic colonization was also observed by the last sampling times, i.e. from 10 to 15days after inoculation, although fungal structures still remained present in the leaf tissues. These newly developed molecular protocols should facilitate the detection, quantification and monitoring of endophytic B. bassiana strains in different tissues and host plants and would help to unravel the factors and process governing the specific endophytic association between opium poppy and strain EABb 04/01-Tip providing key insights to formulate a sustainable strategy for I. luteipes management in the host. PMID:23851123

Landa, B B; Lpez-Daz, C; Jimnez-Fernndez, D; Montes-Borrego, M; Muoz-Ledesma, F J; Ortiz-Urquiza, A; Quesada-Moraga, E

2013-10-01

406

Efectos de distintas dosis de fertilizante de liberacin controlada (Osmocote) en el desarrollo de plantas de coige, raul y ulmo Effects of different doses of slow-release fertilizer (Osmocote) in the development of coige, raul and ulmo seedlings  

Microsoft Academic Search

SUMMARY This study was carried out with the goal of determining the effects of different doses of slow-release fertilizer (Osmocote) in the development of aerial and root biomass of the native species Nothofagus dombeyi, Nothofagus nervosa, and Eucryphia cordi- folia. Seedlings were raised in containers of 130 cm3 filled with discomposed bark of Pinus radiata calibrated to particles ? 10

Fernando Bustos; Pablo Donoso; Vctor Gerding; Claudio Donoso; Bernardo Escobar

407

Analysis of Two in Planta Expressed LysM Effector Homologs from the Fungus Mycosphaerella graminicola Reveals Novel Functional Properties and Varying Contributions to Virulence on Wheat1[W][OA  

PubMed Central

Secreted effector proteins enable plant pathogenic fungi to manipulate host defenses for successful infection. Mycosphaerella graminicola causes Septoria tritici blotch disease of wheat (Triticum aestivum) leaves. Leaf infection involves a long (approximately 7 d) period of symptomless intercellular colonization prior to the appearance of necrotic disease lesions. Therefore, M. graminicola is considered as a hemibiotrophic (or necrotrophic) pathogen. Here, we describe the molecular and functional characterization of M. graminicola homologs of Ecp6 (for extracellular protein 6), the Lysin (LysM) domain-containing effector from the biotrophic tomato (Solanum lycopersicum) leaf mold fungus Cladosporium fulvum, which interferes with chitin-triggered immunity in plants. Three LysM effector homologs are present in the M. graminicola genome, referred to as Mg3LysM, Mg1LysM, and MgxLysM. Mg3LysM and Mg1LysM genes were strongly transcriptionally up-regulated specifically during symptomless leaf infection. Both proteins bind chitin; however, only Mg3LysM blocked the elicitation of chitin-induced plant defenses. In contrast to C. fulvum Ecp6, both Mg1LysM and Mg3LysM also protected fungal hyphae against plant-derived hydrolytic enzymes, and both genes show significantly more nucleotide polymorphism giving rise to nonsynonymous amino acid changes. While Mg1LysM deletion mutant strains of M. graminicola were fully pathogenic toward wheat leaves, Mg3LysM mutant strains were severely impaired in leaf colonization, did not trigger lesion formation, and were unable to undergo asexual sporulation. This virulence defect correlated with more rapid and pronounced expression of wheat defense genes during the symptomless phase of leaf colonization. These data highlight different functions for MgLysM effector homologs during plant infection, including novel activities that distinguish these proteins from C. fulvum Ecp6. PMID:21467214

Marshall, Rosalind; Kombrink, Anja; Motteram, Juliet; Loza-Reyes, Elisa; Lucas, John; Hammond-Kosack, Kim E.; Thomma, Bart P.H.J.; Rudd, Jason J.

2011-01-01

408

Methodology for producing 100 tons of fuel peat for a cement plant test burn. Metodologia para producir 100 toneladas de turba combustible para una prueba de quema en uns planta de cemento  

SciTech Connect

As a part of the Agency for International Development-funded cooperative project between Los Alamos and Costa Rica, the burning characteristics of Costa Rican peat were to be tested in an application. The cement plant owned by Industria National de Cemento in Cartago has a capability to handle solid fuel and was chosen for the burn demonstration. The Jungle No. 1 Peat Deposit near El Cairo was chosen as the site of the peat excavation. This peat production methodology study covers project site selection, installation of an access road and clearing of the jungle vegetation, removal of an upper layer of organic peat, excavation of fuel-grade peat, transport of the peat to the drying site, and drying and stockpiling of the finished product. As of this date the peat removal for the demonstration project has been started, and a description of the operation is included as an appendix to this paper. 10 figs.

Allen, A.B.; Malavassi, L.; Ramirez, O.; Thayer, G. (Allen (Andrew), Plymouth, NC (USA); RECOPE, San Jose (Costa Rica); Los Alamos National Lab., NM (USA))

1989-05-01

409

Interplay of light and temperature during the in planta modulation of C4 phosphoenolpyruvate carboxylase from the leaves of Amaranthus hypochondriacus L.: diurnal and seasonal effects manifested at molecular levels  

PubMed Central

The interactive effects of light and temperature on C4 phosphoenolpyruvate carboxylase (PEPC) were examined both in vivo and in situ using the leaves of Amaranthus hypochondriacus collected at different times during a day and in each month during the year. The maximum activity of PEPC, least inhibition by malate, and highest activation by glucose-6-phosphate were at 15.00?h during a typical day, in all the months. This peak was preceded by maximum ambient light but coincided with high temperature in the field. The highest magnitude in such responses was in the summer (e.g. May) and least in the winter (e.g. December). Light appeared to dominate in modulating the PEPC catalytic activity, whereas temperature had a strong influence on the regulatory properties, suggesting interesting molecular interactions. The molecular mechanisms involved in such interactive effects were determined by examining the PEPC protein/phosphorylation/mRNA levels. A marked diurnal rhythm could be seen in the PEPC protein levels and phosphorylation status during May (summer month). In contrast, only the phosphorylation status increased during the day in December (winter month). The mRNA peaks were not as strong as those of phosphorylation. Thus, the phosphorylation status and the protein levels of PEPC were crucial in modulating the daily and seasonal patterns in C4 leaves in situ. This is the first detailed study on the diurnal as well as seasonal patterns in PEPC activity, its regulatory properties, protein levels, phosphorylation status, and mRNA levels, in relation to light and temperature intensities in the field. PMID:21045006

Avasthi, Uday K.; Izui, Katsura; Raghavendra, Agepati S.

2011-01-01

410

A .--We conducted winter censuses of two short-distance migrants, Hermit Thrushes (Catharus gu atus) and Yellow-rumped Warblers (Dendroica coronata), over seven years in five  

E-print Network

THRUSHES (CATHARUS GUTTATUS) AND YELLOW-RUMPED WARBLERS (DENDROICA CORONATA) IN SOUTH CAROLINA The Auk 121A .--We conducted winter censuses of two short-distance migrants, Hermit Thrushes (Catharus gu atus, en cinco ambien- tes diferentes, de dos migrantes de corta distancia, Catharus gu atus y Dendroica

McCarty, John P.

411

Mercado telefnico en Mxico: diez aos despus de la privatizacin de Telmex  

Microsoft Academic Search

El sector de las telecomunicaciones en Mxico experiment una profunda transformacin durante la dcada de los aos noventa: el monopolio pblico telefnico fue privatizado (1990), se emiti una nueva ley del sector (1995), se cre un nuevo ente regulador (1996) y se abri a la competencia el segmento de larga distancia (1997). El cambio estructural en el sector trajo consigo

Leonardo E. Torre Cepeda; Armando Lpez Velazco

2000-01-01

412

Modelo gravitatorio y turismo: Una aplicacin a los flujos monetarios interregionales del sector Turismo en Espaa  

Microsoft Academic Search

RESUMEN: Este trabajo analiza los flujos monetarios domsticos del sector Turismo en Espaa mediante diferentes especificaciones del modelo gravitatorio, aplicados a tres estimaciones alternativas de los flujos monetarios bilaterales. Los modelos han permitido identificar las principales variables que actan como factores de atraccin de los flujos interregionales, obteniendo elasticidades diferentes para la variable distancia a las observadas en los flujos

Tamara de la Mata; Carlos Llano

2010-01-01

413

Compresion de audio y video Practica 2: Compresion de Video  

E-print Network

Compresi´on de audio y video Pr´actica 2: Compresi´on de Video Ej 1. MPEG-1 Video Codificar una de las secuencias de video. Fijar 12 cuadros para cada grupo de cuadros (GOP) y M=3 (M es la distancia

Figueira, Santiago

414

Internet, Multimedia and Virtual Laboratories in a 'Third World' Environment.  

ERIC Educational Resources Information Center

Describes the development of low-cost multimedia courses and materials for use on the Internet, as well as virtual laboratories, at the Universidad Estatal a Distancia (Costa Rica). Explains how simultaneous production of traditional printed materials and online courses, outsourcing, and the use of HTML and Java can reduce costs for developing

Monge-Najera, Julian Antonio; Rivas Rossi, Marta; Mendez-Estrada, Victor Hugo

2001-01-01

415

The Auk 119(1):149165, 2002 ANNUAL SURVIVAL RATES OF WINTERING SPARROWS: ASSESSING  

E-print Network

Sound), dos especies migratorias de distancia moderada (Melospiza lincolnii y Passerella iliaca) y dos Spar- row [Melospiza melodia gouldii]), one short-distance migrant (``Puget Sound'' White lincolnii] and Fox [Passerella iliaca] sparrow), and two long-distance migrants (``Gam- bel's'' White

Sandercock, Brett K.

416

Astronomia Juan Pablo Pinasco  

E-print Network

(135-51 a.C.), nuevos c´alculos: distancia al sol, la mitad; tama~no del sol, mejor; radio terrestre de la zona que ve, otras que no, y m´as de 1000 estrellas en total tabla trigonom´etrica (la primera

Pinasco, Juan Pablo

417

La familia popular en la reflexin econmica del final del siglo XVIII  

E-print Network

como el núcleo primitivo. En las Cartas sobre los obstáculos que la naturaleza, la opinión y las leyes trabajo posesión de aquella tierra: vea vmd. nacer el derecho de propiedad. A cierta distancia otras

Paris-Sud XI, Université de

418

C A L I F O R N I A E N V I R O N M E N T A L P R O T E C T I O N A G E N C Y Boletn de Prensa  

E-print Network

industriales, así como la operación y el mantenimiento de una planta de tratamiento de aguas residuales y el, para 38 operadores, ingenieros y reguladores de plantas de tratamiento de aguas residuales de México plantas de tratamiento de aguas residuales. El curso incluyó temas tales como una revisión general de las

419

DEL FOLKLORE AL MECANISMO MOLECULAR: EL EJEMPLO DE AJOENE  

Microsoft Academic Search

Bsicamente, se utilizan tres enfoques generales para el desarrollo de drogas derivadas de plantas: 1. Eva- luaciones fitoqumicas en bsqueda de constituyentes que contengan determina- dos grupos qumicos de compuestos (alcaloides, triterpenos, glicsidos, etc). 2. Seleccin de plantas que contengan deter- minados compuestos qumicos, y evalua- cin por bioensayos. 3. Seleccin de plantas basadas en el Folklore, es decir en

ELIADES LEDEZMA; RAFAEL APITZ-CASTRO; T. H. Huxley

420

une ftamme 2000 est de 10-2:; gramme, interm-diaire entre la masse de l'atome d'hydrogne (1 0-24)  

E-print Network

(1909) 490-491. 2. Nature (1904) 270. J. RUTHERFORD, Radio-activity, p. 592. 4. Otto HAHN et Lise communications récentes de Otto Malin et Lise MeitnerB de Russ et Makower 3 donnent la descrip- tion d

Paris-Sud XI, Université de

421

O universo do homem social e o lugar da realidade objetiva: Um dilogo entre Pierre Teilhard de Chardin e Milton Santos  

Microsoft Academic Search

Uma questo a respeito de nosso tempo que merece ateno reporta-se condio do homem alienado. Sem a adequada conscincia da dimenso evolutiva, social e cultural do espao que lhe cabe vida em comum, prossegue no curso da histria produzindo um modo de vida destitudo de preocupaes teleolgicas e, portanto, desvirtuado dos processos de personalizao e socializao que condiz

Cilene Gomes

2009-01-01

422

Quatre levs morpho-sdimentaires, obtenus au moyen du sonar balayage latral, ont t raliss sur le domaine marin ctier Dieppe/Le Trport (Seine Maritime), entre 1988  

E-print Network

R?SUM? Quatre levés morpho-sédimentaires, obtenus au moyen du sonar à balayage latéral, ont été-Maritime, France), were made using side scan sonar data. The results were integrated in a geographic information

Paris-Sud XI, Université de

423

En cas de disparit entre les informations inscrites sur cette grille horaire et celles diffuses sur le guichet tudiant, ces dernires ont priorit. Mise jour : 17 juin 2014  

E-print Network

sur le guichet étudiant, ces dernières ont priorité. Mise à jour : 17 juin 2014 \\\\OCEAN\\psy.docx COURS CAMPUS LAVAL HIVER 2015 HEURES LUNDI MARDI MERCREDI JEUDI VENDREDI 8h 30 à 11h 30 PSY3254L : Maturité et vieillesse Campus LAVAL PSY3032L : Neuropsychologie humaine Campus LAVAL Hugo Théoret PSY

Parrott, Lael

424

Evolution temporelle des ingalits sociales de mortalit en France entre 1968 et 1996. Etude en fonction du niveau d'tudes par cause de dcs.  

E-print Network

women), colorectal cancer, other cancers, cardiovascular diseases, ischaemic heart diseases, cerebrovascular diseases, other cardiovascular diseases, external causes, other causes of death. Socio of death studied among women, and for cancer and cardiovascular diseases among men. The contribution

Paris-Sud XI, Université de

425

Relations quantitatives entre les craies silex et les formations rsiduelles silex de l'ouest du bassin de Paris  

NASA Astrophysics Data System (ADS)

During the past century, the autochthonous and allochthonous origin of clay with flints from underlying chalk rocks has been the subject of many discussions. In order to have a better understanding of the origin of this unit, a weathering balance between chalk and clay with flints was made. This balance was estimated by an accurate knowledge of mother chalk ages and by comparison of grain size distribution and geochemistry between chalk and clay with flints. These comparisons are based on the quantities of flints in chalk and in clay with flints, because flints are autochthonous and their weathering is calculated. Results provide several new elements on the Cretaceous evolution of the Paris-London Basin: chalk of Maastrichtian age existed in the Paris Basin, and we now have good estimations of the quantities of chalk that disappeared through weathering. Results further show that the stratigraphic succession of chalk is maintained in the clay with flints. Additionally, flints (autochthonous elements of clay with flints) are only slightly weathered. Clay with flints matrix is composed of a significant allochthonous fraction in the first 10 m, which diminishes with depth and disappears below a depth of 20 m. Pure clay with flints issued from chalk decarbonatation only exists at a depth greater than 20 m.

Laignel, Benot; Quesnel, Florence; Meyer, Robert; Macaire, Jean-Jacques

1998-08-01

426

serait donc un peu trop grande. Leurs rsultats oscil-laient d'ailleurs entre 4,5 et 3. 10-10. La nlthode de  

E-print Network

'eau : l'on obtiendrait une deuxième équation permettant d'éliminer la densité des granules. Dans leurs contre la méthode employée3. Ainsi M. Bol L- wood a dû faire une correction pour le dégagement de l

Paris-Sud XI, Université de

427

Relacin entre Condiciones de Suelo y Manejo de Huertas de Nogal Pecanero Carya illinoensis Koch con la Dinmica de la Pudricin Texana, causada por Phymatotrichum omnivorum Duggar  

Microsoft Academic Search

From 1995 to 1998, 26 plots of three ha each were selected in commercial walnut orchards. The objective of the survey was to relate the dynamics of Phymatotrichum root rot with orchard management and soil condition. The management variables were: age of the trees, plantation distance, trees\\/ha, pest management, number of irrigations and incidence of diseased trees (in 1995); for

Jos Alfredo Samaniego-Gaxiola; Teodoro Herrera-Prez; Jess Santamara-Csar

2001-01-01

428

ASOCIACIN ENTRE PUDRICIN TEXANA (Phymatotrichopsis omnivora) E INSECTOS BARRENADORES DEL NOGAL (Carya illinoensis)* ASSOCIATION BETWEEN COTTON ROOT ROT (Phymatotrichopsis omnivore) AND BORER INSECT OF PECAN TREE (Carya illinoensis)  

Microsoft Academic Search

Euplatypus segnis (Chapuis) (Coleoptera: Platypodidae) causes severe damage to pecan (Carya illinoensis) trees at Coahuila, Mexico. The present study was carried out during 1999-2001 in a 90 ha pecan orchard, divided in eight lots, during 1999-2001. The trees were counted and clasified in four categories: attacked by borer insects and with symptoms of cotton root rot (Phymatotrichopsis omnivora); only attacked

Jos Alfredo Samaniego-Gaxiola; Manuel Ramrez-Delgado; Aurelio Pedroza-Sandoval; Urbano Nava-Camberos

429

Dialogue essais-modle pour l'interprtation des liens entre mesure d'auto-chauffement sous chargement cyclique et fatigue polycyclique  

E-print Network

chargement cyclique et fatigue polycyclique Model-experiment dialogue to link self-heating under cyclic loadings to high cycle fatigue properties SYLVAIN CALLOCH 1* , CEDRIC DOUDARD 1 , FRAN?OIS HILD 2 , MARTIN. It is based on the using of self-heating measurements under cyclic loadings. The validation of this approach

430

Le portrait dvotionnel dans la peinture des anciens Pays-Bas entre 1400 et 1550: approche mthodologique pour une analyse du langage de l'image  

Microsoft Academic Search

From the early Middle Ages onwards devotional portraits are well attested but during\\u000athe 15th century they occupy a prominent place in the pictorial production of the Low Countries. If at first these portraits were largely reserved to princes and kings, they now spread into broader social circles. Bourgeois, nobles, ducal officials and clergy wanted to leave traces of their

I. M. J. Falque

2011-01-01

431

Fatores associados ao consumo de lcool e drogas entre estudantes universitrios Factors associated with drug and alcohol use among university students  

Microsoft Academic Search

OBJECTIVE: Recent studies show an alarming rate of alcohol and drug use among university students. The objective of this study was to assess the level of association between lifestyle and socioeconomic status and the prevalence of alcohol, tobacco, medicine, and \\

Arthur Guerra de Andrade II

2006-01-01

432

Se identifica una relacin entre la falta de exmenes de deteccin y una gran parte de los casos de cncer de seno en la etapa avanzada  

Cancer.gov

Los autores de un estudio publicado el 20 de octubre de 2004 en la revista Journal of the National Cancer Institute1? declaran que las dos prioridades principales del sistema de salud deben ser aumentar el porcentaje de exmenes de mamografa e invertir en investigaciones que mejoren la tecnologa para detectar el cncer de seno.

433

Consquences de l'interaction entre prfrences pour l'habitat et quantit de ressources trophiques sur les communauts d'insectes coprophages (Coleoptera: Scarabaeoidea)  

NASA Astrophysics Data System (ADS)

Between the years 1988 and 1995, five dung beetle communities were studied in combined conditions of habitat and trophic resources. Investigations were conducted on La Viale experimental farm, in the Causse Mjean, southern France. At each site, dung beetle traps of standard design were set up simultaneously. In most situations, the vegetation cover acted like a filter that allowed the penetration of several ubiquitous but fundamentally open-habitat dung beetle species into forest, at the same time drastically limiting their numbers. Open and close sites differed significantly, open and grazed sites showing the highest richness, abundance and biomass in beetles. Both in open and close sites, a significant increase in trophic resources led to an increase of the diversity and evenness. However in open-habitat, when resources were too abundant, few species were favoured and the diversity and evenness decreased. In forest-habitat, a continuous grazing during several years (increase in resources) modified the dung beetle community, with a high increase in the numbers and biomass of beetles but a smaller increase in richness. Numbers in forest habitat readjusted to the level observed in open habitat with equivalent trophic resources. Similarly to what was observed in open pastures, the forest communities were able to adjust their numbers to the level of available trophic resources. Resources were a more active variable than the structure of habitat on the dung beetle communities. Important resources go against the filter effect which allows the penetration under cover of open-habitat species. Changes were slow (several years), and forest communities remained weak. The poverty of forest habitats is discussed: This scarcity in species is probably due to long time human activities in Europe which drastically reduced forest habitats and developped grazing, favouring generalist and heliophilous open-habitat dung beetle species. Actual grassland communities in Europe are richer than their homologous communities in North America. Conversely, in North America where human activities are recent, the true forest dung beetle communities are still diverse and richer than grassland communities.

Kadiri, Nassera; Lobo, Jorge M.; Lumaret, Jean-Pierre

434

Influence du nombre de piges eau colors enjaune et de la distance entre ces piges sur les captures d'aphides  

E-print Network

captures d'aphides Jean-Michel RABASSE, Etienne BRUNEL Joëlle ROUZ?-JOUAN LN.R.A., Station de Zoologie et!mmt Aphides, ' explicables par la proximité de haies. Le nombre de captures par piège diminue lorsque la and distance between them in relation to the structure of aphid catches Yellow water traps, Yellow water traps

Boyer, Edmond

435

Dinmica dos usos e coberturas da terra em rea de Preservao Permanente na Bacia Hidrogrfica dos Rios Mogi Guau e Pardo, no perodo entre 1988 e 2002  

Microsoft Academic Search

O objetivo deste trabalho foi estudar a dinmica de uso e ocupao da terra em reas de Preservao Permanente APPs - na Bacia Hidrogrfica dos Rios Mogi Guau e Pardo, estado de So Paulo, de modo a subsidiar a formulao de polticas pblicas. As APPs foram identificadas e mapeadas usando imagens do Landsat-7. O uso antrpico em reas de

Luis Alberto Ambrosio; Maria Do Carmo Ramos Fasiaben; Jener Fernando Leite De Moraes

2008-01-01

436

RELACIONES ENTRE LA COMUNICACIN Y LAS MEDIACIONES PARA LA EDUCACIN Y DIVULGACIN DE LA CIENCIA RELATIONSHIPS BETWEEN COMMUNICATION AND MEDIATIONS FOR SCIENCE EDUCATION AND POPULARIZATION  

Microsoft Academic Search

This essay analizes the interrelationships among science, communication and mediations on science education from a Latin American viewpoint. There are four themes in the present work which, although shown individually, are very tightly interwoven among themselves. It starts with some general social implications of science, followed by the description of several processes of the social communication of science as one

Silvia Domnguez Gutirrez

2006-01-01

437

DE ENTRE LOS OLVIDADOS DE SIEMPRE, LA RESISTENCIA Y LAS VOCES NUEVAS, ORGANIZACIN Y ALTERNATIVAS: 10 CONCEPTOS SOBRE LOS NUEVOS MOVIMIENTOS SOCIALES.  

E-print Network

: movimientos sociales, identidades, autonomía, redes, horizontalidad, diversidad, multiculturalidad: 10 CONCEPTOS SOBRE LOS NUEVOS MOVIMIENTOS SOCIALES. Tatiana COLL LEBEDEFF Universidad Pedagógica movimientos sociales o nuevos sujetos de la acción social, muchos de ellos comparten un conjunto de

Boyer, Edmond

438

Un estudio financiado por los Institutos Nacionales de la Salud (NIH) muestra reduccin en la mortalidad entre hombres con cncer de prstata en grado intermedio:  

Cancer.gov

Terapia hormonal por corto tiempo administrada en combinacin con radioterapia a hombres con cncer de prstata en estadio inicial aument sus posibilidades de vivir ms en comparacin con tratamiento de radioterapia sola, segn un estudio clnico patrocinado por el NCI. Los beneficios del tratamiento combinado se limitaron principalmente a pacientes con enfermedad de riesgo intermedio y no se observaron en hombres con cncer de prstata de riesgo bajo, indican los investigadores.

439

LOS RASTROS DEL MEGATERIO COMPARACIN ANATMICA ENTRE Eremotherium rusconii Y Bradypus variegatus The Tracks of the Megaterium. Anatomical Comparision between Eremotherium rusconii and Bradypus variegatus  

Microsoft Academic Search

Based on an anatomical comparison between Eremotherium rusconii and Bradypus variegatus and a literature review, similarities and differences between these species were estab- lished in an attempt to explain the extinction of E. rusconii. Proportions between femur and humerus, scall, hair, nails and metabolism were compared. Based on this, it appears that B. variegatus survival was related to its smaller

RICAURTE VIVEROS; CATALINA LARA; MANUEL HOYOS; MARIO MURCIA

440

Estatuto del Docente: Modificaciones Introducidas entre el Mes de Junio de 1967 y Setiembre de 1970 (Teacher Regulations: Changes Made between June 1967 and September 1970).  

ERIC Educational Resources Information Center

This booklet contains the modifications made in the regulations governing the teaching profession in Argentina between June 1967 and September 1970. Regulations cover the qualifications and requirements for certification, promotion, and retirement and the mechanics for classification and advancement. (VM)

Ministerio de Cultura y Educacion, Buenos Aires (Argentina). Centro National de Documentacion e Informacion Educativa.

441

La Linguistica Aplicada a la Relacion Paradigmatica entre los Verbos "Ser" y "Estar" (Linguistics Applied to the Paradigmatic Relationship between the Verbs "Ser" and "Estar")  

ERIC Educational Resources Information Center

Speakers of Italian often have problems mastering Spanish because they erroneously believe its great similiarity to Italian makes it easy to learn. One of the fundamental problems is the lack of ability to choose the correct verb, "ser" or "estar," both equivalents of the Italian "essere." (Text is in Spanish.) (CFM)

Marchetti, Magda Ruggeri

1977-01-01

442

TRANSFERTS DE POPULATIONS ENTRE LES NIVEAUX DE TRIPLET DE LA CONFIGURATION (5 s, 5 d) DE L'ATOME DE CADMIUM  

E-print Network

'ATOME DE CADMIUM EN PR?SENCE D'AZOTE B. LANIEPCE, et G. CREMER Laboratoire de Spectroscopie Atomique la configuration (5 s, 5 p) d'atomes de cadmium excités optiquement, en fonction de la pression d of the intensity of fluorescence radiation ((5 s, 5 p) ~ (5 s, 5 d)) from optically excited (5 s, 5 d) cadmium

Paris-Sud XI, Université de

443

Clculo do ndice do arco plantar de staheli e a prevalncia de ps planos: estudo em 100 crianas entre 5 e 9 anos de idade  

Microsoft Academic Search

SUMMARY The authors studied 100 normal children from the general population of both genders with ages ranging from 5 to 9 years old in order to evaluate the plantar arch index and the flat-feet prevalence. The flat-feet evaluation was obtained by means of the footprint and the plantar arch index (IP), which establishes the ratio between central and posterior regions

Arnaldo Jos Hernandez; Luiz Koichi Kimura; Marcos Henrique Ferreira Laraya; Edimar Fvaro

2007-01-01

444

La lnea divisoria que une: Una exploracin de la cultura hbrida en la regin fronteriza entre Mxico y los Estados Unidos  

Microsoft Academic Search

With the creation of our modern world came the ideology and system of nation-states. Land in its most natural and undivided condition was marked, fenced, walled, and mapped in order to give direct power of territory to a nation-state. The borderline between the United States and Mexico was established not so long ago, in 1857 after the US-Mexico War. The

Molly J Foye

2012-01-01

445

Entre le mythe et l'histoire: L'oscillation du romanesque (Between Myth and History: The Oscillation of the Romanticism).  

ERIC Educational Resources Information Center

A discussion of Romantic literature examines the links between literature and history and a mythic mechanism, a recurrent polarization between two opposite trends (myth and history) at the level of discourse, symbols, and representation. Mytho-romantic and neo-romantic are distinguished and examined. (Author/MSE)

Tremblay, Victor Laurent

1989-01-01

446

Transect sismique continu entre l'arc des Nouvelles-Hbrides et la marge orientale de l'Australie: programme FAUST (French Australian Seismic Transect)  

NASA Astrophysics Data System (ADS)

Within the framework of the joint FAUST (French Australian Seismic: Transect) program, the Australian research vessel Rig-Seismic recorded a series of multichannel seismic profiles between the New Hebrides Arc and the Australian Margin. The very high quality of these profiles allows the examination of the continental or oceanic basement over the whole area surveyed. In basins beneath the eastern margin of the northern Lord Howe Rise and the New Caledonia Basin, where the crust is thinner, the Moho discontinuity is present at about 8.5 seconds two-way time (TWT) (about 12-13 km) on the profiles processed onboard. The data collected suggest that the sedimentary section within the basins includes syn-rift Cretaceous sediments that are not yet definitively identified. The Upper Eocene-Middle Oligocene subduction of the Australian plate beneath the Pacific plate is highlighted by thrust faults concentrated along the Lord Howe, Norfolk and Fairway Ridges. This episode probably corresponds to the period of convergent tectonism associated with the Upper Eocene obduction of the New Caledonian ophiolites.

Van de Beuque, Sabrina; Auzende, Jean-Marie; Lafoy, Yves; Bernardel, George; Nercessian, Alex; Rgnier, Marc; Symonds, Phil; Exon, Neville

1998-12-01

447

d'une manire gnrale la relation entre les intensits rflchie et rfracte partir de la thorie de Maxwell, et cela en suivant une  

E-print Network

'ien, et l'effet Doppler découvert par Stark. L'expérience de Wien permet de calculen la vitesse et la hypothèse conduit à des conclusions qui concordent dans leurs détails essentiels avec l'effet Stark observé produire l'ionisation ; 3° Que la molécule frappante n'émette pas de radiations présentant l'effet Stark

Paris-Sud XI, Université de

448

L'accroissement de l'intensit des raies de l'arc entre les vapeurs extrieures et le centre ressemble l'accroissement de l'intensit  

E-print Network

.-F.-C. Sur la mesure de l'effet Zeeman. - P. 282-287. Dans une étude sur l'effet Zeeman, M. Purvis avait, nos 3, 4 et 5 ; t. XLI, nos 6 et 7 ; 1913. J. STARK, A. FISCHER et H. KIRSCHBAUlB1. - Le spectre des que fournissent les rayons-canaux de He. - Le choix de cette méthode se justifie ainsi : D'après Stark

Paris-Sud XI, Université de

449

Effect of different levels of technology upon expected yields, costs, and returns for major crops in Diamante Departamento, Entre Rios province, Argentina  

E-print Network

)989. 5 I 7, 551. 3 3) ) 2 50 . 0 27, 9?7. 6 13, 389. 6 17) 5'-'). 3 3)932 o LI))170. 0 167)239 7 2. 6 LI+. 5 55?1 137. 0 273. 8 557 9 1, 351. 1 3)932 ' 0 7)085. 0 Source: Conse, jo Provincial de Desarrollo, Co:iuilaci6n Estad~stica de..., i cn. o w s. ol (8-" I 7 OCt CC. L COO IOO O ? ~? ' G CC CCRC / G B C3 Figure 6. Average yieids for corn in Diamanie Departalnento for 1GI50/51 - 1964/65 period. . O i, S 00 1, 100 1 15 1. 101 i, I C 0~C (Ci i lip, li YO ' 7CC...

Albarracin, Ernesto Oscar

1970-01-01

450

Color\\/race inequalities in oral health among Brazilian adolescents* Cor\\/raa e desigualdades em sade bucal entre adolescentes brasileiros  

Microsoft Academic Search

This study assessed oral health outcomes (perceived dental treatment need, untreated dental caries, gingival bleeding, periodontal pockets, and pain in teeth and gums), in relation to color\\/race inequalities among adolescents in each Brazilian region. The database included dental examination and interview of 16,833 15-19-year-old ado- lescents, surveyed by the Brazilian health authority, from May 2002 to October 2003, in accordance

Joo Luiz Bastos; Maria da Luz; Karen Glazer Peres; Marco Aurlio Peres

2009-01-01

451

Relao entre desenvolvimento motor corporal e aquisio de habilidades orais*** Relationship between the motor development of the body and the acquisition of oral skills  

Microsoft Academic Search

Background: the literature points to the influence of body posture on the oral skills of children which sensorimotor deficits. Only a few studies with normal children exist on this subject. Aim: to study the relationship between motor skills and oral motor skills in children, from the first day of life to 24 months of age. Method: 42 children were video

Maringela Silva Telles; Clia Sperandeo Macedo

452

Institut de Fsica Interdisciplinria i Sistemes Complexos (IFISC) L'IFISC (Institut de Fsica Interdisciplinria i Sistemes Complexos) s un centre de titularitat compartida entre  

E-print Network

) THEfoDA: Theory and Mechanisms of Social Interactions in the Big Data Era, amb la col·laboració de la i efectes col·lectius en sistemes socials Resum de les activitats i les dades principals de l, amb la col·laboració de la IFIP, International Federation for Information Processing i la Network

Oro, Daniel

453

Anlise Ecoepidemiolgica da Incidncia da Doena de Chagas em Abaetetuba, Barcarena e Bragana, no estado do Par, entre 2000 e 2006, utilizando Geotecnologias Livres  

Microsoft Academic Search

The main propose of this paper is to demonstrate the ecoepidemiological analysis of the spatial distribution of vectors of Chagas's Disease in the municipalities of Abaetetuba, Barcarena and Bragana, in the state of Par. Taking into account that the incidence of this disease is linked to human activities such as deforestation, agriculture for subsistence, among others. To achieve this goal

Cludia Souza; Douglas Gasparetto; Cleice T. N. Souza; Nelson F. L. Soffiatti

454

Procedimiento para la enseanza de la discriminacin entre derecha e izquierda. Estudio de caso para un nio con deficiencia visual y discapacidad intelectual  

Microsoft Academic Search

The aim of the research was the teaching of the discrimination between right and lelf in a seven-year-old child with visual impairment and intellectual disability. The tea- ching was approached from the perspective of the analysis of the stimuli implied in the discriminations. The learning procedure consisted of the explicit teaching of the simple discrimination which included a stimulus, an

Francisco J. ALS; Araceli SNCHEZ RAYA; Juan A. MORIANA ELVIRA

455

Relations structurales entre U 3O 8 et quelques fluorures mixtes de formules M2M' 3F 11, MM' 2F 7 et MM' 3F 10  

NASA Astrophysics Data System (ADS)

U 3O 8 oxide, as well as M2M' 3F 11, MM' 2F 7 and MM' 3F 10 fluorides, with M = Rb, Tl, Cs, NH 4 and M' = In, Lu, Yb, Tm, is described as the regular repetition according to the A-A-A sequence of identical and parallel sheets of edge-and corner-sharing M'F 7 or UO 7 pentagonal bipyramids and M'F 6 octahedra. M' and U atoms are systematically located at the lattice points of a pseudohexagonal network, but in the fluorides some of these lattice points are vacant, producing hexagonal tunnels in which M atoms are located. It is shown that in the two kinds of compounds the same linear chains and M' 3X17 groups of pentagonal bipyramids are present, and that the transformation of the U 3O 8 structure into the fluorides can be achieved by an ordered substitution of some linear U?O?U?O chains by M- M- M chains. All these structures can be described with the same structural model based on the chemical twinning principle.

Alonard, S.; Le Fur, Y.; Champarnaud-Mesjard, J. C.; Frit, B.; Roux, M. Th.

1983-01-01

456

MATERIAUX 2010 18-22 octobre 2010 Nantes, France Relations entre la microstructure 3D et les proprits mcaniques dans des  

E-print Network

(2400°C ) dans un four à arc, puis à les couler dans un moule. Le matériau est ensuite solidifié et refroidi dans le moule (figure 1). Les dendrites de zircone formées par la solidification subissent deux

Paris-Sud XI, Université de

457

Relationship between PCBs in suspended and settled sediments from a coastal lagoon Relacin entre PCBs en sedimentos suspendidos y depositados de una laguna costera  

Microsoft Academic Search

Polychlorinated biphenyl (PCB) congener concentrations and organic matter content were determined in 84 samples of suspended and settled sediments collected from six different locations in the Ria Formosa lagoon (Portugal). Total PCB (tPCB) concentrations were higher in the suspended matter (1.00-39.80 ng g -1 dw) than in the sediments (0.10-2.10 ng g -1 dw) and, in general, the same was

Lusa A. Barreira; Maria J. Bebianno; Stephen M. Mudge; Ana M. Ferreira; Clarisse I. Albino; Lus M. Veriato

2005-01-01

458

. Demeulenaere -Revue d'Etudes en Agriculture et Environnement, 94-4 (2013), 421-441 Les semences entre critique et  

E-print Network

techniques modernes d'innovation variétale, refus de la relégation des agriculteurs dans une position, Biodiversity Classification JEL: Q01, Q10 Je remercie mes compagnons de route dans cette recherche : les

Boyer, Edmond

459

Relao entre o adolescente e o tabaco: estudo de fatores sciodemogrficos de escolares em Santa Maria, RS Relationship between adolescence and tobacco: a study of students sociodemographic factors in Santa Maria, RS, Brazil Relacin entre el adolescente y el tabaco: un estudio de factores sociodemogrficos de escolares en Santa Maria, RS, Brasil  

Microsoft Academic Search

Objectives: to describe the prevalence of smoking consumption and evaluate some sociodemographic risk factors in adolescents from Santa Maria, RS, Brazil. Casuistic and Methods: during 1977 academic year, it was undertaken a cross- sectional study; surveys were admnistered to 1.019 randomized students aged 10-to-19 years-old from all private and public schools of the city. Results: the prevalence of smokers was

Alessandro Comar Pasqualotto; Gilberto Comar Pasqualotto; Fabiano Mendoza Segat; Steneo Guillande; Lus Antnio Benvegn

460

Tools for evaluating Lipolexis oregmae (Hymenoptera: Aphidiidae) in the field: Effects of host aphid and host plant on mummy location and color plus improved methods for obtaining adults  

SciTech Connect

Lipolexis oregmae Gahan was introduced into Florida in a classical biological control program directed against the brown citrus aphid, Toxoptera citricida (Kirkaldy), on citrus. Prior to evaluating distribution, host range, and potential nontarget effects of L. oregmae in Florida, we evaluated the role of other potential host aphids and host plants on mummy production and location. Under laboratory conditions, this parasitoid produced the most progeny on the target pest, the brown citrus aphid on citrus. This parasitoid, unlike the majority of aphidiids, did not produce mummies on any of the host plants tested when reared in black citrus aphid T. aurantii (Boyer de Fonscolombe) on grapefruit, spirea aphid Aphis spiraecola Patch on grapefruit and pittosporum, cowpea aphid A. craccivora Koch on grapefruit and cowpeas, or melon aphid A. gossypii Glover on grapefruit and cucumber. Thus, sampling for L. oregmae mummies of these host aphids and host plants must involve holding foliage in the laboratory until mummies are produced. This parasitoid requires high relative humidity to produce adults because no adults emerged when mummies were held in gelatin capsules, but high rates of emergence were observed when mummies were held on 1.5% agar plates. In addition, we compared the color of 6 aphid hosts and the color of mummies produced by L. oregmae when reared in them to determine if color of mummies could be used to identify L. oregmae . Mummy color varied between aphid hosts and tested host plants, and is not a useful tool for identifying L. oregmae for nontarget effects. (author) [Spanish] Lipolexis oregmae Gahan fue introducida en Florida por medio de un programa de control biologico clasico dirigido contra el afido pardo de los citricos, Toxoptera citricida (Kirkaldy), sobre Citrus. Prioritario a la evaluacion de la distribucion, el rango de los hospederos y los efectos potenciales de L. oregmae sobre los organismos que no son el enfoque de control en la Florida, nosotros evaluamos el papel de otras especies de afidos y plantas hospederas potenciales sobre la produccion y ubicacion de las momias. Bajo condiciones de laboratorio, este parasitoide produjo el mayor numero de progenies sobre la especie de plaga enfocada, el afido pardo de los citricos sobre Citrus . Este parasitoide, no como la mayoria de los afidiidos (Hymenoptera), no produjo momias sobre cualquiera de las plantas hospederas probadas cuando fue criado sobre el afido negro de los citricos, ( T. aurantii (Boyer de Fonscolombe)) en toronja, el afido spirea (Aphis spiraecola Patch) en toronja y pittosporum, el afido del caupi (A. craccivora Koch) en toronja y caupi o el afido del melon (A. gossypii Glover) en toronja y pepino. Asi, el muestreo para momias de L. oregmae de estas especies de afidos hospederos y plantas hospederas tiene que incluir el mantenimiento de follaje en el laboratorio hasta que se produzcan las momias. Este parasitoide requiere una alta humedad relativa para producir los adultos por que ningun adulto emergio cuando las momias fueron mantenidas en capsulas de gelatina, pero una tasa alta de emergencia de adultos fue observada cuando se mantuvo las momias en platos con agar al 1.5%. Ademas de esto, nosotros comparamos el color de 6 especies de afidos hospederos, asi como el color de las momias producidos por L. oregmae cuando fue criado sobre ellos para determinar si se puede usar el color de las momias para la identificacion de L. oregmae . El color de las momias varia entre las especies de afidos hospederos y las plantas hospederas probadas, por lo que no es una herramienta util para la identificacion de L. oregmae o para la evaluacion de su efecto sobre los organismos que no son el enfoque del control. (author)

Singh, R.; Hoy, M.A. [Department of Entomology and Nematology, University of Florida, Gainesville, FL (United States)

2007-03-15

461

Hydraulic properties and scale effects investigation in regional rock aquifers, south-western Quebec, Canada  

NASA Astrophysics Data System (ADS)

This paper reports on the characterization of hydraulic properties of regional rock aquifers carried out within a groundwater resources assessment project in the St. Lawrence Lowlands of south-western Quebec. To understand the aquifer behavior at both the fracture level and at field scale, hydraulic investigations were carried out using various aquifer tests. The groundwater flow at the local scale is controlled mostly by the fracture system. Results of the constant-head injection tests show a weak decreasing trend of hydraulic conductivity with depth indicating that a major part of the groundwater flow occurs in the first meters of the rock sequence. At the regional scale, the equivalent porous media approach is applicable. The hydraulic conductivity measurements were correlated to the scale of the aquifer tests expressed with the investigated aquifer volume. A simple interpolation procedure for the hydraulic conductivity field was developed based on the distance between field measurements and the tested aquifer volumes. The regional distribution of the hydraulic conductivity for the major fractured aquifer units indicates that dolostone is the most permeable whereas sandstone and crystalline rocks are the least permeable units. Este artculo trata de la caracterizacin de las propiedades hidrulicas en acuferos regionales rocosos, la cual se llev a cabo dentro del proyecto de evaluacin de los recursos de agua subterrnea en St. Lawrence Lowlands al suroeste de Quebec. Para entender el comportamiento del acufero tanto a nivel de fractura como a escala del campo, se ejecutaron investigaciones hidrulicas usando varias pruebas de acufero. El flujo del agua subterrnea a escala local est controlado principalmente por el sistema de fracturas. Los resultados de las pruebas de inyeccin con cabeza constante muestran una tendencia decreciente dbil de la conductividad hidrulica con la profundidad, indicando que la mayor parte del flujo de agua subterrnea sucede en los primeros metros de la secuencia rocosa. A escala regional se puede aplicar la aproximacin equivalente de medios porosos. Las medidas de la conductividad hidrlica fueron comparadas con la escala de las pruebas del acufero, expresadas con el volumen investigado del acufero. Se desarroll un proceso de interpolacin simple para la conductividad hidrulica de campo, con base en la distancia entre las medidas de campo y los volmenes probados del acufero. La distribucin regional de la conductividad hidrulica, para las unidades acuferas fracturadas mayores, indica que la dolomita es ms permeable mientras que la arenisca y las rocas cristalinas son las unidades menos permeables. L'article prsente les proprits hydrauliques d'un aquifre rgional rocheux qui ont t mesures dans le cadre d'un projet concernant l'estimation de la ressource en eau de la plaine de St. Lawrence situe dans la partie sud-ouest de Quebec. Affin de comprendre le comportement de l'aquifre tant l'chelle de fracture qu' l'chelle rgionale on a men des investigations hydrauliques en utilisant des essais differents. l'chelle locale l'coulement est dtermin en principal par le systme des fractures. Les rsultats des essais d'injection au niveau constant ont montr une tendence de dcroissance de la conductivit hydraulique avec la profondeur ce qui indique que l'coulement ait lieu en principal dans les premiers mtres de la structure rocheuse. l'chelle rgionale on peut appliquer l'approche de milieux poreux equivalent. Les mesures de conductivit hydraulique ont t corrles avec l'chelle des essais de pompage exprime en termes de volume investigu de l'aquifre. On a mis au point une mthode simple d'interpolation pour le champ de la conductivit hydraulique base sur la distance entre les essais in situ et les volume investigus de l'aquifre. La distribution rgionale de la conductivit hydraulique montre que pour la majorit des units de roche fractur les plus permable sont

Nastev, M.; Savard, M. M.; Lapcevic, P.; Lefebvre, R.; Martel, R.

462

TIRO CON ARCO NIVEL II: AVANZADO (3 CONVOCATORIAS) DESCRIPCIN  

E-print Network

las armas de fuego quedó obsoleto y relegado al uso deportivo o de ocio. Como deporte, formó parte de a dianas situadas a 70 metros de distancia. También es deporte paralímpico desde los Juegos Paralímpicos de Tiro con Arco, puede tener un gran interés para la comunidad universitaria: · Porque es un deporte

Escolano, Francisco

463

TIRO CON ARCO NIVEL I: INCICIACIN (2 CONVOCATORIAS) DESCRIPCIN  

E-print Network

aparecer las armas de fuego quedó obsoleto y relegado al uso deportivo o de ocio. Como deporte, formó parte a dianas situadas a 70 metros de distancia. También es deporte paralímpico desde los Juegos Paralímpicos de Tiro con Arco, puede tener un gran interés para la comunidad universitaria: · Porque es un deporte

Escolano, Francisco

464

EFEITOS DA ADUBAO ORGNICA E DA POCA DE COLHEITA NA QUALIDADE DA MATRIA-PRIMA E NOS RENDIMENTOS AGRCOLA E DE ACAR MASCAVO ARTESANAL DE DUAS CULTIVARES DE CANA-DE-ACAR (CANA-PLANTA) Effects of organic fertiliser and harvest date on quality and agricultural yield and of raw-sugar of two sugarcane cultivar (plant cane)  

Microsoft Academic Search

The objective of this work was to study the effects of three fertilizers process (30 t. ha -1 of corral manure, 3,5 t.ha -1 of chicken manure and chemical fertilizer - 120 kg.ha-1 of P 2O5 and of K 2O at planting time + 60 kg.ha -1 of N in covering) and three harvest dates (July, August and September of

Ivan Antnio dos Anjos; Luiz Antnio de Bastos Andrade; Julio Csar Garcia; Paulo Alexandre; Monteiro de Figueiredo; Gabriel Jos de Carvalho

465

Louvain-la-Neuve, lundi 24 octobre 2011 Recherche UCL  

E-print Network

pharmacologiques dans les plantes L'UCL participe au programme européen de recherche Pharma-Planta. Lancé en 2004 et à cultiver à grande échelle. Le défi pour Pharma-Planta était de passer de la validation d'anticorps obtenus de manière classique. D'autres aspects du programme de recherche Pharma-Planta ont également

Nesterov, Yurii

466

Produo de hidrolases pelo fungo Dicyma pulvinata, e purificao de uma beta-glucanase do isolado CEN62.  

E-print Network

??Dissertao (mestrado)Universidade de Braslia, Instituto de Cincias Biolgicas, Departamento de Biologia Celular, 2009. A seringueira (Hevea spp.) uma planta nativa da regio amaznica, da (more)

Agustinho, Daniel Paiva

2009-01-01

467

Isolamento, identificao fenogenotpica e potencial bioativo de microrganismos endofticos intrinsecamnete associados Miconia albicans no Cerrado de So Carlos - SP.  

E-print Network

??Microrganismos endofticos vivem em associao simbitica com plantas e habitam nichos biolgicos nicos, alm de serem potenciais produtores de substncias naturais bioativas com estrutura qumica (more)

Ana Candida Martins Toledo Piza

2009-01-01

468

Relationships between Duck and Grassland Bird Relative Abundance and Species Richness in Southern Saskatchewan Relations entre l'abondance relative et la richesse spcifique des canards et d'autres oiseaux de prairie dans le sud de la Saskatchewan  

Microsoft Academic Search

Digital map products that integrate long-term duck population and land-use data are currently being used to guide conservation program delivery on the Canadian Prairies. However, understanding the inter-relationships between ducks and other grassland bird species would greatly enhance program planning and delivery. We hypothesized that ducks, and Northern Pintail ( Anas acuta) in particular, may function as an umbrella guild

Susan P. Skinner; Robert G. Clark

469

PORTAL WEB GEO-ESCOLA: UMA PONTE ENTRE CONCEITOS DE GEOCIN- CIAS E OS PROFESSORES DE ENSINO FUNDAMENTAL E MEDIO GEO-SCHOOL WEBSITE: A BRIDGE BETWEEN CONCEPTS OF GEOSCIENCES AND TEACHERS OF BASIC AND MEDIUM-LEVEL EDUCATION  

Microsoft Academic Search

The Geo-School website belongs to the Geo-School project; both have been born from the idea that, in the Brazilian basic education, the geosciences contents offer a rich contribution for the formation of students pupils, although their insertion is too low in these school levels. The website takes advantage of digital didactic material generated on interdisciplinary topics as Earth dynamics, water

CELSO D. R. CARNEIRO; VLANDER V. SIGNORETTI; RONALDO BARBOSA; JOSELI M. PIRANHA

470

El Informe Anual a la Nacin indica que la tasa de mortalidad por cncer est bajando el doblesu enfoque especial examina el cncer entre los indgenas americanos y los nativos de Alaska  

Cancer.gov

Segn un nuevo informe de las principales organizaciones oncolgicas de la nacin, las tasas de mortalidad por cncer disminuyeron en promedio 2,1 por ciento por ao de 2002 a 2004; casi el doble de la disminucin anual de 1,1 por ciento por ao de 1993 a 2002. Estos resultados se encuentran en el "Informe Anual a la Nacin sobre el Estado del Cncer de 1975 a 2004. Preguntas y respuestas

471

Heat Transfer With High Flux Density Between a Wall and Water, With Local Boiling at the Wall; TRANSFERT DE CHALEUR A DENSITE DE FLUX ELEVEE ENTRE PAROI ET EAU AVEC EBULLITION LOCALE A LA PAROI  

Microsoft Academic Search

The aim of the present study was to determine the relationship between ; the temperature of a hot wall and that of a cooling fluid under conditions where ; this fluid is subject to local boiling at the wall. Attention was directed ; particularly to the aspect of the phenomenon in the transition region between the ; classical turbulent convection

J. Baumier; M. Robin; B. Schwab; L. Vautrey

1958-01-01

472

1998. O.Hoffmann "Polticas agrarias, reformas del Estado y afiliaciones identitarias: una comparacin entre Colombia y Mxico" Revista Mexicana de Sociologa N4/98, Mxico, pp99-123.  

E-print Network

, y fiel a sus orientaciones hacia la liberalización de los mercados (de tierras, en este caso identidad permite re-evaluar el lugar respectivo de los actores locales - campesinos, indios, negros, Estado el impulso a un mercado de tierras para los pequeños campesinos que deben entonces asumir

Paris-Sud XI, Université de

473

Los Presupuestos Generales de Estado para 2007 : diferencias entre el proyecto de presupuestos y los presupuestos aprobados y anlisis de las polticas de gasto gestionadas por el Estado y por la Seguridad Social  

Microsoft Academic Search

Aunque en Espaa los Presupuestos Generales del Estado abarcan un mbito limitado dentro las Administraciones Pblicas,1 tienen una gran importancia pues constituyen el principal instrumento financiero del gobierno para conseguir sus fines de poltica econmica. En general, es conveniente analizar los presupuestos desde diferentes perspectivas. Por una parte, es preciso conocer sus efectos globales sobre la economa en su conjunto,

Valentn Edo Hernndez

2007-01-01

474

Diaz Olvera L., Plat D., Pochet P., Sahabana M. (2010), Entre contraintes et innovations, volutions de mobilit quotidienne dans les villes d'Afrique subsaharienne, Espace Populations Socits, n2, pp.  

E-print Network

Saharan African cities Lourdes Diaz Olvera, Didier Plat, Pascal Pochet, Maïdadi Sahabana lourdes.diazolvera@entpe.fr didier.plat@entpe.fr pascal.pochet@entpe.fr msahabana@louisberger.com Résumé Comment se déplaceton concerns the relative sharing in the use of a rare asset, the personal car, which allows to extend

Paris-Sud XI, Université de

475

Faible diffrenciation gntique, partir d'amplification alatoire d'ADN polymorphe (RAPD), entre les types de pin sylvestre ( Pinus sylvestris L.) d'altitude et de plaine dans les Alpes climat continental  

Microsoft Academic Search

Random amplified polymorphic DNA (RAPD) patterns show weak genetic differentiation between low- and high-elevation types of Scots pine (Pinus sylvestris L.) in dry continental valleys in the Alps. Two types of Scots pine (Pinus sylvestris L.), found either in the lowland or in the subalpine zone, are morphologically distinguished in the central-Alpine Valais (Switzerland), a dry continental valley. The low-elevation

Nicolas Fournier; Andreas Rigling; Matthias Dobbertin; Felix Gugerli

2006-01-01

476

Les "petits mots" de coordination: etude diachronique de leur apparition chez quatre enfants entre 3 et 4 ans (The "Little" Coordinating Words: A Diachronic Study of Their Appearance in Four Children, ages 3-4)  

ERIC Educational Resources Information Center

Reports on a diachronic study concerning the syntactic phenomena of coordination and subordination and their place in language acquisition. The organization and evolution of the coordination system of 4 children, ages 3-6 was studied. The need for investigation of adult speech for further understanding acquisition is stressed. (Text is in French.)

Chambaz, Marcelle; And Others

1975-01-01

477

Served meals include simple bud vase, standard house linen for your guest tables, china, flatware, glassware, dinner roll & artisan bread assortment with butter and margarine, salad, entre with Chef's pairing of vegetable & starch to compliment, house des  

E-print Network

coffee, decaffeinated coffee & hot water with assorted tea packets, sweeteners, Half & Half, lemon wedges of Chicken with Citrus-Olive Relish $24.00 per guest Chicken Chardonnay with White Wine Artichoke Sauce $24.00 per guest Chicken Miraboux with White Wine & Lemon Jus $24.00 per guest Apple & Brie Stuffed Breast

Holsinger, Kent

478

La Desercion Escolar en los Niveles de Sexto y Noveno Grado: Una Comparacion Entre Zonas Rurales y Urbanas. Boletin 219 (The Educational Desertion in the 6th and 9th Grades: A Comparison Between Rural and Urban Zones. Bulletin 219).  

ERIC Educational Resources Information Center

In 1962 and again in 1965, a group of sixth and ninth grade students in selected schools in four Puerto Rican communities were interviewed to investigate the factors influencing students' decision to withdraw from school before completing twelfth grade and to identify some characteristics of dropouts. Of 616 students interviewed in 1962, 20.9% of

Lopez, Maria I. Hernandez; And Others

479

Sntomas depresivos relacionados con la alteracin de los ritmos circadianos. Concordancia entre la percepcin de mdicos y pacientes sobre prevalencia, impacto clnico y su respuesta a los frmacos antidepresivos actuales  

Microsoft Academic Search

This is a descriptive, transversal and multicenter study using self-administered surveys concurrently to collect the opinions of two groups (psychiatrists and patients) and discuss their disagreements.The scope of study are hospital services, outpatient centers, individual professional consultation and other assistance system, public or private, which provides psychiatric care in Spain. Participated in this study 319 psychiatrists and 957 patients with

Luis San Molina; Jos Manuel Montes-Rodrguez; Fernando Caballero-Martnez; Fernando lvarez Lozano; Marta Garca Manrique

2011-01-01

480

The Relationship between Business Ownership and Unemployment in Spain: A Matter of Quantity or Quality?\\/La relacin entre el autoempleo y el desempleo en Espaa: Una cuestin de cantidad o de calidad?  

Microsoft Academic Search

This paper examines the interrelations between self-employment and unemployment rates for Spain in the period 1972-2004, comparing them with the general pattern observed for OECD countries. We apply the model as proposed by Audretsch, Carree, van Stel and Thurik (2005) to Spain. The divergence between predicted and actual unemployment levels in Spain are explained by countryspecific shocks in the period

INGRID VERHEUL; ANDR VAN STEL; ROY THURIK; DAVID URBANO

2006-01-01

481

EFECTOS DE ORDEN DE PRESENTACIN ENTRE CRITERIOS DE RESPUESTAS BASADOS EN RELACIONES DE SEMEJANZA Y DE EQUIVALENCIA-EQUIVALENCIA EFFECTS OF PRESENTATION ORDER AMONG RESPONSE CRITERIA BASED ON RELATIONSHIPS OF SIMILARITY AND EQUIVALENCE-EQUIVALENCE  

Microsoft Academic Search

This paper describes an experiment which shows how the arbitrary relationship of equiva- lence-equivalence can be blocked, and in turn to block, to a non arbitrary relationship as it is the physical similarity among stimuli, in function of the order of presentation of the answer crite- ria. It was carried out with University students. This equivalence-equivalence paradigm was proposed in

ANDRS GARCA; JESS GMEZ; VICENTE PREZ; CRISTBAL BOHRQUEZ; TERESA GUTIRREZ

2003-01-01

482

Actes du Colloque International : L'dition pour la jeunesse entre hritage et culture de masse, Institut International Charles-Perrault (IICP) et Universit Paris VII-Jussieu, 25, 26 et 27 novembre 2004, CD-ROM  

E-print Network

les lecteurs d'Harry Potter Résumé L'étude des représentations de l'école et des disciplines chez les lecteurs d'Harry Potter révèle quatre moteurs de lecture: - la métaphorisation qui se nourrit de la les conflits qui structurent les apprentissages réels. Mots-clés : Harry Potter; métaphorisation

Paris-Sud XI, Université de

483

Tensions entre rationalit technique et intrts politiques : lexemple de la mise en uvre de la Loi sur les agences de dveloppement de rseaux locaux de services de sant et de services sociaux au Qubec  

PubMed Central

Sommaire Lobjet de cet article est constitu par les processus dcisionnels entourant la mise en uvre de la Loi sur les agences de dveloppement de rseaux locaux de services de sant et de services sociaux (Loi 25). Nous entendons mettre en lumire les stratgies des groupes ou institutions de diverses natures qui ont fait valoir leurs prfrences et ont tent, avec un succs ingal, dinfluencer les dcisions relatives cette rforme majeure de la structure du systme de sant qubcois. Au plan thorique, nous nous appuyons principalement sur les modles danalyse du lobbying qui, depuis les travaux fondateurs de Milbrath (1960, 1963), prsentent cette pratique comme un processus fondamental dchange dinformation. Selon les donnes colliges dans les retranscriptions dentrevues, les stratgies observes correspondent effectivement aux caractristiques constitutives du lobbying et, dans quelques situations, celles du patronage. La combinaison de ces divers lments rvle que la mise en uvre de la Loi 25 savre tre avant tout un processus proprement politique. Ainsi, furent relgus au second plan les arguments techniques qui composaient initialement les objectifs de la Loi. PMID:23509412

Contandriopoulos, D.; Hudon, Raymond; Martin, Elisabeth; Thompson, Daniel

2013-01-01

484

Highlighting the Impacts of North-South Research Collaboration among Canadian and Southern Higher Education Partners (Principaux impacts des collaborations de recherche Nord-Sud entre les partenaires des etablissements d'enseignement superieur du Canada et du Sud)  

ERIC Educational Resources Information Center

The Association of Universities and Colleges of Canada (AUCC) felt it was timely to create an academic forum in which university researchers have the opportunity to engage with their peers and relevant stakeholders and document the impacts of their North-South research collaboration in a peer-reviewed publication. The Association achieved this by

Association of Universities and Colleges of Canada, 2006

2006-01-01

485

Comparacin en la germinacin de semillas y crecimiento de plntulas entre gramneas nativas y exticas del pastizal semirido Seed germination and seedling growth in native and exotic grasses in the semiarid grasslands of Northern Mexico  

Microsoft Academic Search

Exotic African grasses have been introduced into deteriorated semiarid grasslands in northern Mexico to stop soil erosion and improve land productivity. These species are characterized by larger size and greater seed productivity than natives, traits which may contribute to eventual displacement of native grasses. Invasion of natural ecosystems alters species composition and ecosystem functioning, making identification of the traits and

Silvia Margarita Carrillo Saucedo; Tulio Arredondo Moreno; Elisabeth Huber-Sannwald; Joel Flores Rivas

486

Le complexe annulaire d'ge Oligocne de l'Achkal (hoggar Central, Sud Algrie) : tmoin de la transition au Cnozoque entre les magmatismes tholitique et alcalin. vidences par les isotopes du Sr, Nd et Pb  

NASA Astrophysics Data System (ADS)

The Achkal Oligocene ring complex cross-cuts the Upper Eocene tholeiitic traps located on the top of the Hoggar swell. The plutonic rocks range from tholeiitic gabbros to alkali essexites, monzonites and syenites, whereas the volcanites are restricted to late peralkaline rhyolites. The affinity change linked to the large isotopic heterogeneities (from EM1 to HIMU) suggests that the parental magmas are issued from two distinct mantle sources, first lithospheric then deeper. The Achkal has recorded the magmatic evolution of the Hoggar hot spot, between Eocene and Miocene.

Maza, Mustapha; Briqueu, Louis; Dautria, Jean-Marie; Bosch, Delphine

1998-08-01

487

L'agriculture familiale se dfinit par le recours quasi-exclusif du travail familial, sans sa-laris permanents,et par des interrelations fortes entre les agriculteurs et leur exploitation.Le  

E-print Network

1 #12;L'agriculture familiale se définit par le recours quasi-exclusif à du travail familial, sans agricultures familiales. Avec ses 500 millions d'exploitations, elles font vivre 2,6 milliards de personnes et, les agricultures familiales sont présentes sur tous les continents et dans tous les écosystèmes. Cette

488

Estudo Comparativo entre os Constituintes Volteis Liberados por Machos Ceratitis Capitata e Anastrepha obliqua (Diptera: Tephritidae) e seus Frutos Hospedeiros Preferencial Averrhoa carambola L. e Secundrio, Carica papaya L.  

E-print Network

??Os machos de moscas-das-frutas (Diptera: Tephritidae) liberam uma mistura complexa de constituintes qumicos para atrair machos e fmeas coespecficos (feromnio de agregao). Nas espcies de (more)

Carlos Eduardo da Silva

2005-01-01

489

Differentiation of migrainous positional vertigo (MPV) from horizontal canal benign paroxysmal positional vertigo (HC-BPPV): Diferenciacin entre el vrtigo postural migraoso (MPV) y el vrtigo postural paroxstico benigno del canal horizontal (HC-BPPV)  

Microsoft Academic Search

This article presents an approach to differentiation of migrainous positional vertigo (MPV) from horizontal canal benign paroxysmal positional vertigo (HC-BPPV). Such an approach is essential because of the difference in intervention between the two disorders in question. Results from evaluation of the case study presented here revealed a persistent ageotropic positional nystagmus consistent with MPV or a cupulolithiasis variant of

Richard A. Roberts; Richard E. Gans; Allison H. Kastner

2006-01-01

490

Associaes entre hipergamaglobulinemia E, alteraes ultra-sonogrficas do fgado e fatores de risco para Larva migrans visceral, e ELISA positivo para Toxocara canis em crianas e adolescentes: Estudo caso-controle.  

E-print Network

??The lack case-control study a regard visceral larva migrans at children and adolescents encouraged accomplishment of retrospective, observational, case-control study was conducted between 2004 and (more)

Elaine Alvarenga de Almeida Carvalho

2008-01-01

491

La lithostratigraphie des grandes zones structurales des Mauritanides, entre le 14e et le 16e parallles nord (Sngal oriental et Rp. Isl. de Mauritanie). Essai d'interpretation geodynamique  

NASA Astrophysics Data System (ADS)

In eastern Senegal and southern Mauritania, the thrusted and more or less metamorphosed units of the Mauritanides belt involve similar lithostratigraphical sequences including, from the bottom to the top, a green volcano-sedimentary series (Nagara and Bouly groups) then a detrital red series (Ndoumli group) and a quartzitic series (Ndio group). In the more external part of the belt these sequences are completed with coarse sandstones which are thought to be the equivalent of upper Ordovician sediments of glacial origin (Sakha group) and, at the top, red fossiliferous sandstones of Devonian age. All of these sequences can be correlated with the upper Proterozoic-Devonian sedimentary sequence of the West African craton. The facies variations as well as the volcanic features allow one to define four main structural zones that are, from east to west: an Autochthonous, which includes the western margin of the Taoudeni basin, a Parautochthonous, displaced but not metamorphosed, an External Zone which comprises basic and ultrabasic rocks, and an Internal Zone marked by acid and andesitic metavolcanism. These zones are more or less linked with palaeogeographic domains which were created during an upper Precambrian distensive phase occurring prior to the Mauritanides orogeny. The detrital sedimentation is regarded as the result of the erosion of structures which arose during different stages of a compressive taconic-hercynian event.

Le Page, A.

492

Portrait des diffrences entre les genres dans le contexte de l'apprentissage de l'lectricit en fonction de la certitude exprime lors de la production de rponses  

Microsoft Academic Search

This exploratory research aims to describe changes in the feeling-of-knowing (FOK) experienced by high school students who are being introduced to the fundamental concepts of electricity through learning by discovery. The analysis focuses first on the initial state of boys and girls in terms of their prior experience and the perception they have of their abilities in science and technology,

Patrice Potvin; Martin Riopel; Patrick Charland; Julien Mercier

2011-01-01

493

An unusual cause of a painful plantar mass  

Microsoft Academic Search

Anomalous or accessory muscles in and around the foot and ankle have been reported in 8% of the population. Quadratus plantae muscle is one of the medial anomalous muscles in the foot and is a rare cause of heel pain or mass. This muscle has been implicated in tarsal tunnel syndrome. There is exiguous radiological description of quadratus plantae muscle

Suchi Gaba; Michael Allen; Raj Bhatt

2008-01-01

494

Why Range Forage Quality Changes (Spanish)  

E-print Network

las herb?ceas y arbus- tivas, lo que hace a estas partes de los pastos m?s dif?ciles de digerir. Comparadas con las plantas de crecimiento de verano, las plantas de crecimiento invernal tienen mejor digestibilidad y mayor contenido de prote?- na cruda...

Lyons, Robert K.; Machen, Richard V.; Forbes, T. D. A.

2001-09-10

495

Membrane heredity and early chloroplast evolution  

Microsoft Academic Search

Membrane heredity was central to the unique symbiogenetic origin from cyanobacteria of chloroplasts in the ancestor of Plantae (green plants, red algae, glaucophytes) and to subsequent lateral transfers of plastids to form even more complex photosynthetic chimeras. Each symbiogenesis integrated disparate genomes and several radically different genetic membranes into a more complex cell. The common ancestor of Plantae evolved transit

Thomas Cavalier-Smith

2000-01-01

496

Nuevos fenmenos en erupciones cometarias  

NASA Astrophysics Data System (ADS)

Se discuten aqu tres procesos fsicos novedosos encontrados en la actividad de cometas: 1) El rol de una distribucin de granos de hielo como fuente extendida de H2O en la coma, 2) El efecto de una discontinuidad en el plasma cometario, llamada Cometopausa, sobre la excitacin del radical OH , y 3) La actividad por erupciones a grandes distancias heliocntricas (r > 5 AU). Con respecto a 1) y 2), se presentan modelos que ajustan bien con las observaciones. En cuanto a 3), se presentan explicaciones posibles al fenmeno, y se trata el interesante caso de Chirn 2060, basndose en observaciones propias tomadas desde el CASLEO y datos anteriores.

Silva, A.

497

American Journal of Botany 84(11): 16171620. 1997. BRIEF COMMUNICATION  

E-print Network

mass, and embryo/endosperm mass in offspring of Plantago lanceolata. Parental temperature significantly temperature; Plantago lanceolata; Plantaginaceae; seed mass. Many studies of parental (maternal) effects have seed mass in Plantago lanceolata L. (Planta- ginaceae), a cosmopolitan temperate herbaceous plant

Lacey, Elizabeth P.

498

Pear seedling production by double grafting in quince using japons as rootstock.  

E-print Network

??Plantas de pereira quando enxertadas em marmeleiros apresentam porte reduzido. O marmeleiro Japons poderia ser uma opo como porta-enxerto, no entanto pesquisas revelaram incompatibilidade ainda (more)

Karine Ester Seifert

2010-01-01

499

Ecology & Management Effect of Simulated Browsing on Aspen Regeneration: Implications for Restoration  

E-print Network

of California, Davis, CA 95616, USA. Abstract Aspen (Populus tremuloides Michx.) is a disturbance season. Resumen Alamo (Populus tremuloides Michx.) es una planta que depende del disturbio, es resistente, grazing, intensity, Populus tremuloides Mi

Tate, Kenneth

500

INHABITANTS OF LANDSCAPE SCARS: SUCCESSION OF WOODY PLANTS AFTER LARGE, SEVERE FOREST FIRES IN ARIZONA AND NEW MEXICO  

E-print Network

of Populus tremuloides. At both sites, greater cover of woody plants that reproduce from off-site seed) se hallaron en el sotobosque de Populus tremuloides. En ambos sitios, la mayor cobertura de plantas

Schweik, Charles M.