Search results for "Lenin"
showing 10 items of 22 documents
CCDC 636428: Experimental Crystal Structure Determination
2007
Related Article: J.Konu, T.Chivers, H.M.Tuononen|2006|Inorg.Chem.|45|10678|doi:10.1021/ic061545i
Le radici linguistiche del liberalismo gramsciano
2010
Vida de Lenin : dedicada a los trabajadores del Universo
In vivo monitoring of alkaloid metabolism in hybrid plant cell cultures by 2D cryo-NMR without labelling
2003
Non-invasive measurements of alkaloid metabolism in plant cell suspension cultures of a somatic hybrid from Rauvolfia serpentina Benth. ex Kurz and Rhazya stricta Decaisne were carried out. When cell samples were taken sequentially from a stock feeding experiment, measuring times for in vivo NMR of 40 min were sufficient for following conversions of alkaloids at the natural abundance of 13C. Degradation of ajmaline added to the cells at 1.6 mM concentration to raumacline could be monitored after 96 h on a standard 800 MHz NMR instrument (Avance 800). Feeding vinorine an intermediate of ajmaline biosynthesis at 1.8 mM showed with a 500 MHz CryoProbe that the alkaloid enters two metabolic rou…
In vitro Polymerization of ?-Carotene into Sporopollenin
1988
Dysfasiakuntoutuksen muutos kahden tapausselosteen valossa
1998
Molecular cloning and functional bacterial expression of a plant glucosidase specifically involved in alkaloid biosynthesis.
2000
Monoterpenoid indole alkaloids are a vast and structurally complex group of plant secondary compounds. In contrast to other groups of plant products which produce many glycosides, indole alkaloids rarely occur as glucosides. Plants of Rauvolfia serpentina accumulate ajmaline as a major alkaloid, whereas cell suspension cultures of Rauvolfia mainly accumulate the glucoalkaloid raucaffricine at levels of 1.6 g/l. Cell cultures do contain a specific glucosidase. known as raucaffricine-O-beta-D-glucosidase (RG), which catalyzes the in vitro formation of vomilenine, a direct intermediate in ajmaline biosynthesis. Here, we describe the molecular cloning and functional expression of this enzyme in…
Ceci c'est la pipe: come si racconta l'assedio di Leningrado
2017
L'assegnazione del premio Nobel a Svetlana Aleksievič è stata interpretata da più parti come un atto di canonizzazione della letteratura non-fiction, e spesso come una prova della caduta definitiva delle barriere tra letteratura e giornalismo. Aleksievič ha però alle spalle, nella letteratura sovietica, una tradizione che, se non è definitivamente codificata, risale però probabilmente fino agli anni Trenta e, soprattutto a partire dal dopoguerra, presenta una consistenza niente affatto trascurabile. L'analisi comparata di un testo del maestro dichiarato di Aleksievič, Ales' Adamovič, la Blokadnaja kniga (scritta a quattro mani con Daniil Granin) e della più canonica delle opere letterarie s…
Vomilenine Reductase — a novel Enzyme catalyzing a crucial Step in the Biosynthesis of the Therapeutically applied Antiarrhythmic Alkaloid Ajmaline
2002
Delineation of the biochemical pathway leading to the antiarrhythmic Rauvolfia alkaloid ajmaline has been an important target in biosynthetic research for many years. The biosynthetic sequence starting with tryptamine and the monoterpene secologanin consists of about 10 different steps. Most of the participating enzymes have been detected and characterized previously, except those catalyzing the reduction of the intermediate vomilenine. A novel NADPH-dependent enzyme that reduces the intermediate has been isolated from Rauvolfia serpentina cell suspension cultures. Vomilenine reductase (M(r )43 kDa, temp opt 30 degrees C, pH opt 5.7-6.2), saturates the indolenine double bond of vomilenine w…
Alkaloids Isolated from Somatic Hybrid Cell Cultures of the Species CombinationRauwolfia serpentinaxrhazya stricta
1995
Abstract The phytochemical analyses of a somatic hybrid cell suspension culture of the genus and species combination Rauwolfia serpentina x Rhazya stricta revealed a number of monoterpenoid indole alkaloids. The alkaloids were identified as tubotaiwine, an isomeric mixture of vallesiachotamine, stemmadenine and vomilenine and were all produced in small amounts < 2mg/litre cell suspension. The hybrid cells showed a greater diversity of alkaloid biosynthesis when compared with the parental cultures.