GERMINACIÓN, VIGOR, VIABILIDAD, CALIDAD Y MEJORA DE SEMILLAS DE CEBOLLA (ALLIUM CEPA L.)
Master's dissertation (2007)
In this work, it has been attempted to improve the value of a non-commercial seed lot of an onion (Allium cepa L.) local variety from Galicia, Spain. Different seed conditioning treatments have been done ... [more ▼]
In this work, it has been attempted to improve the value of a non-commercial seed lot of an onion (Allium cepa L.) local variety from Galicia, Spain. Different seed conditioning treatments have been done: prehydration, osmotic and matrix priming, hormonal and disinfection treatments. A densimetric seed separation has been carried out to divide the seed lot in four sublots of different quality and to measure seed answers to hormonal treatments. Moreover, a tetrazolium seed test was carried out to determine the causes of the seed lot low germination rate. In the prehydration essay, seeds were immersed in a circulating water flow from 30 minutes to 24 h. Best results were obtained with the 4 h hydration. Prehydration influences micro-organisms contamination percentage of non-germinated seeds. Furthermore, prehydration was combined to a disinfection using sodium hypochlorite 4 % for 4 minutes. Disinfected seeds lost germination capacity. Hormonal treatment consisted in hydrating seeds on filter paper of different GA3 concentration solutions during germination test. GA3 improved germination uniformity but not germination percentage. Best results have been obtained with the 10 mg•L-1 GA3 concentracion. In seed separation, differences in germination rate and vigour have been observed in function of seeds medium weight. Seeds were separated in a vertical air flow that divided seeds in four fraction of growing density. A linear correlation between seed germination percentage and one hundred seeds medium weight was determined. It’s possible to separate seeds in different seed sublots of different quality. Osmotic conditioning were done with deionized water, KNO3 0,1 and 0,3 M and 150, 250 and 350 g•kg-1 PEG-6000 solutions for periods of 24, 48 and 96 h. In PEG-6000 seed osmoconditioning, a significant loss of germination was observed. Deionized water and KNO3 solutions improved seed quality, improving seed germination velocity and uniformity. It has been detected that seed germination uniformity only depends on the period of treatment but not on the solution concentration. Matrix seed priming gave best results with most deteriorated seeds, improving significantly their germination rate but had a few influence on seeds of better quality. Best treatment resulted the one using the proportion in volume seed: matrix: water of 1:10:2 of Algalita® during 6 days. In the viability test, a incomplete maturation of seeds was observed and 52,5 % of seeds were viable, with germination results of 45 % on date of viability test. Cotyledons of 38,5 % of seeds were inmature and 12,5 % of seeds didn’t have any embryo. Low maturation of seeds must have been the cause of the low lot quality. [less ▲]Detailed reference viewed: 278 (13 ULg)
Germinal center innervation and possible implications in prion diseases
Jolois, Olivier ; Thielen, Caroline ; Malgrange, Brigitte et al
Poster (2002)Detailed reference viewed: 22 (2 ULg)
Germinal Center T Cells: Analysis of Their Proliferative Capacity
; ; Heinen, Ernst et al
in Advances in Experimental Medicine and Biology (1995), 378Detailed reference viewed: 9 (0 ULg)
Germinal centre innervation of bovine and human tonsils related to prion diseases.
Defaweux, Valérie ; ; Antoine, Nadine et al
in Brain, Behavior & Immunity (2009), 23(1), 10Detailed reference viewed: 24 (7 ULg)
Germinal centres and the immune response - Discussion
; ; et al
in Research in Immunology (1991), 142Detailed reference viewed: 7 (0 ULg)
Germination hypogée et épigée chez le manioc. Adaptation à des milieux divergents ?
Master's dissertation (2004)
Le type fonctionnel de plantule est un ensemble de traits primordial de la régénération chez les végétaux vasculaires. Différentes combinaisons de traits relatifs à l'hypocotyle et aux cotylédons donnent ... [more ▼]
Le type fonctionnel de plantule est un ensemble de traits primordial de la régénération chez les végétaux vasculaires. Différentes combinaisons de traits relatifs à l'hypocotyle et aux cotylédons donnent des morphotypes divergents, et reflètent différentes stratégies de réponses à des perturbations extérieures. Notre étude portait sur une comparaison des comportements face à l'herbivorie, de jeunes plantules de deux espèces de manioc à morphotype fonctionnel différents, l'une sauvage (Manihot pruinosa Pohl), l'autre domestiquée (Manihot esculenta Crantz ssp. Esculenta). Nos résultats ont montré que l'impact de l'herbivorie était significativement différent selon la morphologie fonctionnelle des plantules prédatées. De plus, nos résultats sur des plantules provenant d'une population à traits morphologiques atypiques, ont mis à jour que certaines combinaisons entre traits sauvages et domestiqués pouvaient être handicapantes en milieu soumis à des perturbations extérieures. Aussi cette expérimentation mériterait d'être renouvelée sur des effectifs plus importants. [less ▲]Detailed reference viewed: 287 (4 ULg)
Germination of Sorghum Under the Influences of Water Restriction and Temperature
; ; et al
in Agricultural Journal (2008), 3(3), 220-224Detailed reference viewed: 6 (0 ULg)
Germination strategies of graminoid and forb species of campos rupestres in Brazil.
; Le Stradic, Soizig ; et al
Poster (2013)Detailed reference viewed: 8 (0 ULg)
Germinome intracrânien bifocal : la biopsie est-elle toujours indispensable?
KREUTZ, Julie ; BONNEVILLE, Jean-François ; Potorac, Iulia et al
in Annales d'Endocrinologie (2013, October), 74Detailed reference viewed: 37 (5 ULg)
Germline AIP, MEN1, PRKAR1A, CDKN1B (p27Kip1) and CDKN2C (p18INK4c) gene mutations in a large cohort of pediatric patients with pituitary adenomas occurring in isolation or with associated syndromic features
Beckers, Albert ; Vanbellinghen, Jean-François ; et al
in ENDO 2008: 90th Annual Meeting of the Endocrine Society - Abstract book (2008)Detailed reference viewed: 49 (3 ULg)
Germline PTPN11 missense mutation in a case of Noonan syndrome associated with mediastinal and retroperitoneal neuroblastic tumors.
; Pierquin, Geneviève ; Janin, Nicolas et al
in Cancer Genetics & Cytogenetics (2008), 182(1), 40-2
Noonan syndrome (NS) is an autosomal dominant disorder characterized by short stature, typical craniofacial dysmorphism, skeletal anomalies, congenital heart defects, and predisposition to malignant ... [more ▼]
Noonan syndrome (NS) is an autosomal dominant disorder characterized by short stature, typical craniofacial dysmorphism, skeletal anomalies, congenital heart defects, and predisposition to malignant tumors. In approximately 50% of cases, the disease is caused by missense mutations in the PTPN11 gene. To date, solid tumors, and particularly brain tumors and rhabdomyosarcomas, have been documented in patients with NS; however, few cases of neuroblastoma associated with NS have been reported. Here we report an unusual case of neuroblastoma with mediastinal, retroperitoneal, and medullar locations associated in a NS patient carrying a PTPN11 germline missense mutation (p.G60A). This missense mutation occurs within the N-SH2 domain of the PTPN11 gene and has been reported to be associated with acute leukemia in NS patients. The association of this p.G60A PTPN11 mutation with neuroblastoma provides new evidence that gain of function PTPN11 mutations may play an important role in the pathogenesis of solid tumors associated with Noonan syndrome. [less ▲]Detailed reference viewed: 53 (11 ULg)
Geršgorin variations III: On a theme of Brualdi and Varga
; ; Crama, Yves et al
in Journal of Linear Algebra and its Applications (2008), 428
Brualdi brought to Geršgorin Theory the concept that the digraph G(A) of a matrix A is important in studying whether A is singular. He proved, for example, that if, for every directed cycle of G(A), the ... [more ▼]
Brualdi brought to Geršgorin Theory the concept that the digraph G(A) of a matrix A is important in studying whether A is singular. He proved, for example, that if, for every directed cycle of G(A), the product of the diagonal entries exceeds the product of the row sums of the moduli of the off-diagonal entries, then the matrix is nonsingular. We will show how, in polynomial time, that condition can be tested and (if satisfied) produce a diagonal matrix D, with positive diagonal entries, such that AD (where A is any nonnnegative matrix satisfying the conditions) is strictly diagonally dominant (and so, A is nonsingular). The same D works for all matrices satisfying the conditions. Varga raised the question of whether Brualdi’s conditions are sharp. Improving Varga’s results, we show, if G is scwaltcy (strongly connected with at least two cycles), and if the Brualdi conditions do not hold, how to construct (again in polynomial time) a complex matrix whose moduli satisfy the given specifications, but is singular. [less ▲]Detailed reference viewed: 34 (5 ULg)
Gertrud Kolmar. Bibliographie der Übersetzungen und Vertonungen
in Nörtemann, Regina; Viehöver, Vera (Eds.) Kolmar übersetzen. Studien zum Problem der Lyrikübertragung (2013)
La première bibliographie des traductions et mises en musique de l'oeuvre de Gertrud Kolmar répertorie des travaux en onze langues différentes, elle contribue à fédérer les recherches encore fort ... [more ▼]
La première bibliographie des traductions et mises en musique de l'oeuvre de Gertrud Kolmar répertorie des travaux en onze langues différentes, elle contribue à fédérer les recherches encore fort dispersées et participe à une reconnaissance plus large de cette poète. [less ▲]Detailed reference viewed: 17 (2 ULg)
Das Gerücht und die Dialektik von "Fremdem" und "Eigenem". Betrachtungen zu Theodor Storms Novelle "Draußen im Heidedorf"
Conference (2011, May 13)Detailed reference viewed: 17 (5 ULg)
GES-18, a new carbapenem-hydrolyzing GES-Type β-lactamase from pseudomonas aeruginosa that contains Ile80 and Ser170 residues.
Bebrone, Carine ; ; et al
in Antimicrobial Agents and Chemotherapy (2013), 57(1)
A clinical isolate of Pseudomonas aeruginosa recovered from the lower respiratory tract of an 81-year-old patient hospitalized in Belgium was sent to the national reference center to determine its ... [more ▼]
A clinical isolate of Pseudomonas aeruginosa recovered from the lower respiratory tract of an 81-year-old patient hospitalized in Belgium was sent to the national reference center to determine its resistance mechanism. PCR sequencing identified a new GES variant, GES-18, which differs from the carbapenem-hydrolyzing enzyme GES-5 by a single amino acid substitution (Val80Ile, in the numbering according to Ambler) and from GES-1 by two substitutions (Val80Ile and Gly170Ser). Detailed kinetic characterization showed that GES-18 and GES-5 hydrolyze imipenem and cefoxitin with similar kinetic parameters and that GES-18 was less susceptible than GES-1 to classical β-lactamase inhibitors such as clavulanate and tazobactam. The overall structure of GES-18 is similar to the solved structures of GES-1 and GES-2, the Val80Ile and Gly170Ser substitutions causing only subtle local rearrangements. Notably, the hydrolytic water molecule and the Glu166 residue were slightly displaced compared to their counterparts in GES-1. Our kinetic and crystallographic data for GES-18 highlight the pivotal role of the Gly170Ser substitution which distinguishes GES-5 and GES-18 from GES-1. [less ▲]Detailed reference viewed: 8 (2 ULg)