Search results for "LONG"
showing 10 items of 3969 documents
Univariate and multivariate statistical aspects of equity volatility
2004
We discuss univariate and multivariate statistical properties of volatility time series of equities traded in a financial market. Specifically, (i) we introduce a two-region stochastic volatility model able to well describe the unconditional pdf of volatility in a wide range of values and (ii) we quantify the stability of the results of a correlation-based clustering procedure applied to synchronous time evolution of a set of volatility time series.
Long Non Coding RNA H19: A New Player in Hypoxia-Induced Multiple Myeloma Cell Dissemination
2019
The long non-coding RNA H19 (lncH19) is broadly transcribed in the first stage of development and silenced in most cells of an adult organism
Kerguelen, un archipel sous haute surveillance
2016
Avec ses côtes découpées et sans cesse battues par les vents, les Kerguelen sont restées longtemps inaccessibles aux biologistes marins. Si sa situation géographique et son isolement exceptionnels rendent cet archipel particulièrement vulnérable aux changements climatiques, ils en font aussi un laboratoire idéal pour en étudier les effets…
Evolutionary relationships among the members of an ancient class of non-LTR retrotransposons found in the nematode Caenorhabditis elegans.
1998
We took advantage of the massive amount of sequence information generated by the Caenorhabditis elegans genome project to perform a comprehensive analysis of a group of over 100 related sequences that has allowed us to describe two new C. elegans non-LTR retrotransposons. We named them Sam and Frodo. We also determined that several highly divergent subfamilies of both elements exist in C. elegans. It is likely that several master copies have been active at the same time in C. elegans, although only a few copies of both Sam and Frodo have characteristics that are compatible with them being active today. We discuss whether it is more appropriate under these circumstances to define only 2 elem…
Light-driven proton transport of bacteriorhodopsin incorporated into long-term stable liposomes of a polymerizable sulfolipid
1983
Abstract The chromoprotein bacteriorhodopsin from Halobacterium halobium has been incorporated into liposomes made of a fully synthetic, polymerizable lipid. Bacteriorhodopsin is found to be active in these polymer liposomes. The advantage in the use of such polymer systems concerning long-term stability in comparison with liposomes made of natural lipid is demonstrated.
The Harvesting Memories Project: Landscape Archaeology in the Castro/Giardinello Valley and Mt. Barraù (Corleone, Palermo)
2018
Il progetto Harvesting Memories è finalizzato allo studio delle interazioni tra dinamiche umane e fattori ecologici che nella lunga durata hanno contribuito alla formazione dei paesaggi rurali. L’area di studio è localizzata tra Corleone e Campofiorito (Palermo) nei pressi delle contrade Castro e Giardinello e lungo le pendici occidentali di Monte Barrù. Questo distretto dell’Alto Belice Corleonese ha rappresentato un asse di collegamento tra la costa meridionale della Sicilia e quella settentrionale fin all’epoca repubblicana con continuità anche nel Medioevo in cui è citato per la prima volta il toponimo Barraù/Barracù, dal nome arabo ra’s e ǧabal bū ‘r-raḫū, nella Jarida di Monreale del …
Electroretinographic oscillatory potentials in insulin-dependent diabetes patients: A long-term follow-up.
2002
Purpose: The aim of this research was to study the relevance of long-term follow-up of electroretinographic oscillatory potentials (OPs) in predicting the onset of minimal non-proliferative diabetic retinopathy in insulin-dependent diabetes patients. Methods: A total of 80 insulin-dependent diabetics, with normal fundi and normal OPs at first examination, were followed prospectively for 10 years. Oscillatory potentials were measured and fundus examinations performed once or twice per year. Results: During follow-up, 35% of patients developed diabetic retinopathy after a mean disease duration of 12 ± 2 years. A decrease in OP amplitudes was seen in 46% of this group, but reductions were also…
Queen loss increases worker survival in leaf-cutting ants under paraquat-induced oxidative stress
2021
Longevity is traded off with fecundity in most solitary species, but the two traits are positively linked in social insects. In ants, the most fecund individuals (queens and kings) live longer than the non-reproductive individuals, the workers. In many species, workers may become fertile following queen loss, and recent evidence suggests that worker fecundity extends worker lifespan. We postulated that this effect is in part owing to improved resilience to oxidative stress, and tested this hypothesis in three Myrmicine ants: Temnothorax rugatulus, and the leaf-cutting ants Atta colombica and Acromyrmex echinatior . We removed the queen from colonies to induce worker reproduction and subjec…
Sustainable Development: E-teaching (now) for Lifelong E-Learning
2011
Abstract To attain knowledge, add things every day. To attain wisdom, remove things every day. LAO TZU , “Tao Te Ching” The paper aims at convincing psychologist to cooperate in permanent education, by giving them a general idea about the first objectives of the PhD thesis titled “Nondeterministic e-Teaching for Sustainable Development in Rapidly Changing Environments”: a) Validating the role of e-teaching for sustainable development in Eastern Europe in line with the Europe 2020 strategy. (Europe 2020 is a 10-year strategy proposed by the European Commission on 3 March 2010 for reviving the economy of the European Union. It aims at “smart, sustainable, inclusive growth” with greater coordi…