Search results for "wolf"
showing 10 items of 157 documents
Construction and expression of a dual vector for chemo-enzymatic synthesis of plant indole alkaloids inEscherichia coli
2010
A dual vector (pQE-70-STR1-SG) containing coding regions of strictosidine synthase (STR1, EC 4.3.3.2) and strictosidine glucosidase (SG, EC 3.2.1.105) from the Indian medicinal plant Rauvolfia serpentina was constructed. Functional expression of the vector in Escherichia coli cells (M15 strain) was proven by isolation of prepurified enzyme extracts, which show both STR1 and SG activities. Incubation of the enzyme in the presence of tryptamine and secologanin delivered the indole alkaloid cathenamine, demonstrating functional co-expression of both STR1- and SG-cDNAs. Cathenamine reduction by sodium borohydride leading to tetrahydroalstonine revealed the chemo-enzymatic indole alkaloid synthe…
La fauna indoeuropea. Sobre els noms del llop i el camell en ie.
2015
Els noms d’animals salvatges i domèstics ocupen un lloc principal en tots els estudis sobre vocabulari, cultura o economia dels indoeuropeus. La seua reconstrucció serveix com a il·lustració molt aclaridora d’un poble que passa de ser nòmada a sedentari i que, probablement fugint d’una climatologia extrema, protagonitza una gran expansió cap a indrets més temperats i fèrtils on descobreix i estén la ramaderia i l’agricultura. En aquest treball farem un breu repàs a la nòmina tradicionalment acceptada d’animals del món indoeuropeu i en revisarem l’etimologia de dos d’ells: el llop, prototip d’animal ferotge en totes les cultures indoeuropees (lupus est homo hominis), i el camell, oblidat en …
The Cabibbo angle as a universal seed for quark and lepton mixings
2015
A model-independent ansatz to describe lepton and quark mixing in a unified way is suggested based upon the Cabibbo angle. In our framework neutrinos mix in a "Bi-Large" fashion, while the charged leptons mix as the "down-type" quarks do. In addition to the standard Wolfenstein parameters (lambda, A) two other free parameters are needed to specify the physical lepton mixing matrix. Through this simple assumption one makes specific predictions for the atmospheric angle as well as leptonic CP violation in good agreement with current observations.
3-Oxo-rhazinilam: A New Indole Alkaloid from Rauvolfia serpentina × Rhazya stricta Hybrid Plant Cell Cultures
2000
A new monoterpenoid indole alkaloid, 3-oxo-rhazinilam (1), was isolated from intergeneric somatic hybrid cell cultures of Rauvolfia serpentina and Rhazya stricta, and the structure was determined by detailed 1D and 2D NMR analysis. It was also proved that 3-oxo-rhazinilam (1) is a natural constituent of the hybrid cells.
Synthesis of (+)-podocarp-8(14)-en-13-one and methyl-(+)-13-oxo-podocarp-8(14)-en-18-oate from abietic acid
1985
Abstract An efficient method for the preparation of (+)-podocarp-8(14)-en-13-one 6 and methyl-(+)-13-oxo-podocarp-8(14)-en-18-oate 8 from abietic acid is described.
Spatial Memory Drives Foraging Strategies of Wolves, but in Highly Individual Ways
2022
The ability of wild animals to navigate and survive in complex and dynamic environments depends on their ability to store relevant information and place it in a spatial context. Despite the centrality of spatial memory, and given our increasing ability to observe animal movements in the wild, it is perhaps surprising how difficult it is to demonstrate spatial memory empirically. We present a cognitive analysis of movements of several wolves (Canis lupus) in Finland during a summer period of intensive hunting and den-centered pup-rearing. We tracked several wolves in the field by visiting nearly all GPS locations outside the den, allowing us to identify the species, location and timing of ne…
«Nozze» napoletane. «La serva onorata» di Giambattista Lorenzi e Nicolò Piccinni (1792)
2012
Nel 1792 il teatro napoletano dei Fiorentini ospitò la prima rappresentazione di una nuova opera comica di Giambattista Lorenzi e Niccolò Piccinni: «La serva onorata». Il libretto era in realtà una libera rielaborazione delle «Nozze di Figaro» di Da Ponte per Mozart. Il saggio avanza alcune ipotesi circa l'arrivo del testo nella capitale meridionale e procede poi a un dettagliato esame delle manipolazioni subite dal modello viennese, che risulta omologato alle convenzioni estetiche e produttive locali. Particolare attenzione viene riservata al ruolo degli interpreti napoletani, che con le proprie caratteristiche condizionano vistosamente il processo di adattamento. In chiusura vengono propo…
MultivariateApart: Generalized partial fractions
2021
We present a package to perform partial fraction decompositions of multivariate rational functions. The algorithm allows to systematically avoid spurious denominator factors and is capable of producing unique results also when being applied to terms of a sum separately. The package is designed to work in Mathematica, but also provides interfaces to the Form and Singular computer algebra systems.
Introduction to General Duality Theory for Multi-Objective Optimization
1992
This is intended as a comprehensive introduction to the duality theory for vector optimization recently developed by C. Malivert and the present author [3]. It refers to arbitrarily given classes of mappings (dual elements) and extends the general duality theory proposed for scalar optimization by E. Balder, S. Kurcyusz and the present author [1] and P. Lindberg.
Dynamics of the biosynthesis of methylursubin in plant cells employing in vivo 13CNMR without labelling.
1995
Abstract In vivo NMR experiments with a digital 600 MHz instrument, exploiting the natural abundance of 13C, allowed us for the first time to follow the biosynthesis of the newly detected glycoside, methylursubin ( 4- methoxyphenyl -O-β- d -primeveroside ), from 4-methoxyphenol through the intermediate methylarbutin in cell suspensions of the Indian medical plant, Rauwolfia serpentina. The metabolic dynamics indicate that, within 48 hr, 4-methoxyphenol is almost completely converted into the primeveroside, methylursubin. Because of the higher sensitivity at 150.9 MHz compared to that at 100.6 MHz, measuring times could be reduced to 1.5 hr. This allows detailed monitoring of the conversion …