Search results for "Dam"
showing 10 items of 3828 documents
De la cratopolítica a la cinicocracia
2004
Guerra de nacionalismos / 1
2006
El descrédito de la democracia / 1: La banalización de la extrema derecha
2006
La Europa social / 3. Bután como modelo
2005
L'Espagne fête trente ans de démocratie
2007
Ielu segumu apstrādes tehnoloģisko risinājumu cieto daļiņu atmosfēras piesārņojuma mazināšanai novērtējums
2015
Darba mērķis ir novērtēt ielu segumu apstrādes tehnoloģiskos risinājumus pielietošanas iespējas un efektivitāti cieto daļiņu atmosfēras piesārņojuma mazināšanai. Literatūras apskatā apkopota informācija par cietajām daļiņām, to avotiem, radīto piesārņojuma līmeni, dažādiem ceļa segumiem, risinājumiem un to ietekmi cieto daļiņu radītā atmosfēras piesārņojuma mazināšanai. Izmantojot apkopoto informāciju par ielu segumu apstrādi un sakopšanu ziemas un vasaras sezonās, kā arī informāciju par esošo piesārņojuma līmeni un situāciju, noskaidrotas galvenās problēmas un to ietekme, kā arī novērtēti šobrīd pielietotie risinājumi gaisa piesārņojuma mazināšanai. Darba pētījuma rezultātu un diskusijas d…
Challenging Dogma: Thresholds for Genotoxic Carcinogens? The Case of Vinyl Acetate
2002
Although many questions remain unanswered, the general principle of the sequence of events leading to cancer after exposure to genotoxic carcinogens has become increasingly clear. This helps to understand the parameters that influence the shape of the dose-effect curve for carcinogenesis, including metabolic activation and inactivation of carcinogens, DNA repair, cell cycle control, apoptosis, and control by the immune system. A linear dose-response relationship with no observable threshold seems to be a conservative but adequate description for the carcinogenic activity of many genotoxic carcinogens, such as aflatoxin B1, the tobacco-specific nitrosoketone NNK, and probably N,N-diethylnit…
E-beam crosslinked, biocompatible functional hydrogels incorporating polyaniline nanoparticles
2012
Abstract PANI aqueous nanocolloids in their acid-doped, inherently conductive form were synthesised by means of suitable water soluble polymers used as stabilisers. In particular, poly(vinyl alcohol) (PVA) or chitosan (CT) was used to stabilise PANI nanoparticles, thus preventing PANI precipitation during synthesis and upon storage. Subsequently, e-beam irradiation of the PANI dispersions has been performed with a 12 MeV Linac accelerator. PVA-PANI nanocolloid has been transformed into a PVA-PANI hydrogel nanocomposite by radiation induced crosslinking of PVA. CT-PANI nanoparticles dispersion, in turn, was added to PVA to obtain wall-to-wall gels, as chitosan mainly undergoes chain scission…
Credit, Debt and FInances of the Queen's Household in the Crown of Aragon at the End of the Fourteenth Century. The Agreement between the Queen Viola…
2018
A finales del siglo XIV la tesorería de la reina Violante de Bar padecía de un fuerte endeudamiento que imposibilitaba prácticamente cualquier pago, por lo que se decidió cambiar la dirección de la gestión económica de la Casa de la reina. En el presente artículo analizaremos las estrategias para solucionar el problema del endeudamiento, mediante la edición y el análisis de los excepcionales capítulos y memoriales firmados por la reina Violante y su nuevo tesorero, Berenguer de Cortilles, uno de sus mayores acreedores privados. At the end of the Fourteenth century, Queen’s treasury in the Crown of Aragon suffered from a heavy debt that made virtually impossible any ordinary payment. As a re…
Evidence that water transmits the disease caused by the fish pathogen Photobacterium damselae subsp. damselae
2000
The transmission through water of the disease caused by the fish pathogen, Photobacterium damselae subsp. damselae, as well as the role of the skin mucus in the initial steps of the infection, have been studied. All tested strains resisted the bactericidal activity of the mucus and showed an ability to adhere to it, but only those virulent by the intraperitoneal route were infective through water. Moribund fishes showed the typical signs of the disease: haemorrhaged areas on the body surface and ulcerative lesions with mucus degradation. These results suggest that the pathogen can be transmitted to fish through water and use the skin as a portal of entry.