Search results for " rose"
showing 10 items of 66 documents
Triterpene saponins from Billia rosea.
2017
Five previously undescribed triterpene saponins, billiosides A-E, and a known analogue, were isolated from the seeds of Billia rosea (Planch. & Linden) C. Ulloa & P. Jorg. Their structures were elucidated on the basis of extensive 1D and 2D NMR experiments (1H, 13C, DEPT, COSY, TOCSY, NOESY, ROESY, HSQC, and HMBC) and mass spectrometry as (3β,21β,22α)-3-[(2-O-β-D-glucopyranosyl-O-[α-L-arabinopyranosyl-(1 → 4)]-β-D-glucopyranosyl)oxy]-21-[((2E,6S)-2,6-dimethyl-6-hydroxyocta-2,7-dienoyl)oxy]-22-(acetyloxy)-24-hydroxyolean-12-en-28-oic acid, (3β,21β,22α)-3-[(2-O-β-D-galactopyranosyl-β-D-glucopyranosyl)oxy]-21,22-dihydroxyolean-12-en-28-yl O-α-L-arabinopyranosyl-(1 → 4)-β-D-glucopyranoside, (3β…
Remarks on biology, vocalisations and systematics of Urocynchramus pylzowi Przewalski (Aves, Passeriformes)
2006
Several field studies in the Qinghai Nanshan area (Qinghai Province, China) have added new findings to the scant knowledge about Przewalski´s Rosefinch Urocynchramus pylzowi Przewalski, 1876. The hitherto completely unknown vocalisations are described and used to clarify systematic relationships. Although one could argue for a relationship to Uragus sibiricus (Pallas), based on nearly identical auditory impression and sonagram structures of their songs, detailed measurements show significant differences in time and frequency parameters. Moreover a mtDNA analysis shows no close phylogenetic relationship to either of three major emberizid clades. These results support the hypothesis that Uroc…
Leibniz, l’individuo, l’Europa: Kurt Huber – Die Weisse Rose
2022
This contribution is dedicated to the figure of Kurt Huber, one of the protagonists of the anti-Nazi resistance group of the White Rose, and to the studies he dedicated to the thought of Leibniz. The great German philosopher, investigated in the link that binds monadology to the thought of individuality, appears as a source for rethinking the relationship between Germany and Europe and for overcoming Nazi barbarism.
Efficacy of the fungicide valiphenal against crown rot of rose caused by Phytophthora citrophthora
2009
Crown and root rot caused by soilborne species of Phytophthora are common diseases of container-grown ornamental plants in nursery. Crown rot of Rose caused by P. citrophthora has been recently reported in Sicily (southern Italy). Valiphenal (IR 5885) is a systemic dipeptide fungicide of the valinamide class of compounds and is active against Oomycetes. This new fungicide is under development by the italian agrochemical company ISAGRO against powdery mildews of grapevine, potatoes and vegetables. In this study, the efficacy of Valiphenal and other experimental active ingredients was tested for the first time against crown rot of Rose. Phosetyl-Al (Aliette) was used as a reference product. M…
Molecular docking and pharmacogenomics of vinca alkaloids and their monomeric precursors, vindoline and catharanthine.
2011
International audience; Vinblastine and vincristine are dimeric indole alkaloids derived from (formerly: ). Their monomeric precursor molecules are vindoline and catharanthine. While vinblastine and vincristine are well-known mitotic spindle poisons, not much is known about vindoline and catharanthine. Vindoline and catharanthine showed weak cytotoxicity, while vinblastine, vincristine, and the semisynthetic vindesine and vinorelbine revealed high cytotoxicity towards cancer cells. This may reflect a general biological principle of poisonous plants. Highly toxic compounds are not only active towards predators, but also towards plant tissues. Hence, plants need mechanisms to protect themselv…
Isolation and characterization of intergeneric somatic hybrids in the Apocynaceae family
1991
Protoplasts were isolated from callus cultures of Rauwolfia serpentina Benth., Rhazya stricta Decaisne, and Catharanthus roseus (L.) G. Don, or from leaves of Vinca minor L. Protoplast isolation, culture, and fusion techniques as well as hybrid screening systems were developed for these species, and hybrids were obtained. Hybrid combinations were Rauwolfia + Vinca, Rauwolfia + Catharanthus, Rauwolfia + Rhazya, and Catharanthus + Vinca. For hybrid isolation, the physiological complementation method was utilized. Analyses of the material obtained included a cytogenetic study of the chromosomes, a study of multiple molecular forms of transferases and esterases, and the blot hybridization of re…
Léon Rosenthal, Chroniques d'art de l'Humanité, 1909-1917
2012
National audience; Si Léon Rosenthal (1870-1932) est encore connu comme historien de l’art ou pour ses fonctions de conservateur du musée des Beaux-Arts de Lyon, et bien que ses livres sur la peinture romantique soient encore lus, on a oublié son engagement de militant socialiste. C’est à ce titre que cet ancien normalien, promoteur de l’Art social et de l’Art à l’école, a publié plus de 170 chroniques dans l’Humanité fondée par Jaurès, où la rubrique artistique lui est confiée de 1909 à 1917. Dans les colonnes du journal, Rosenthal est attentif à l’actualité des Salons et des expositions, des galeries et des musées, mais aussi des ouvrages qui paraissent et dont il propose des « notes » cr…
Léon Rosenthal (1870-1932), militant, critique et historien d'art
2013
International audience; L'ouvrage rassemble les actes du colloque international, ainsi que ceux de deux journées d'études : "Léon Rosenthal, un parcours éditorial, des revues savantes au livre d'art" (Dijon, Archives municipales, 22 septembre 2011) et "La carrière lyonnaise de Léon Rosenthal" (Lyon, Musée des beaux-arts, 8 juin 2012). [source p.10]. - Cet ouvrage est issu d'une enquête effectuée dans le cadre du domaine de recherche "L'histoire et l'histoire de l'art" en partenariat avec l'Institut national d'histoire de l'art et le Centre Georges Chevrier de l'Université de Bourgogne
Léon Rosenthal, Villes et villages français après la Grande Guerre
2014
International audience
Variability of Christmas rose (Helleborus niger L.) populations and its potential use in genetic breeding
2005
International audience; The Christmas rose (Helleborus niger L.) is widely distributed in Southern and Central Europe, and Slovenia is probably one of the centers of its diversity. The investigation was aimed at evaluating phenotypic diversity among selected wild populations in Slovenia and neighboring Croatia. Some of the analyzed traits expressed relatively very high variation (e.g., number of leaves per plant, number of inflorescences per plant). The variation ranges of some of the analyzed traits were found to be wider than those mentioned in the literature. Statistical analysis indicated that variability was more expressed within than between populations. In terms of present market req…