Search results for " TYR"

Towards storage-stable high-content recycled tyre rubber modified bitumen

2018

The addition of crumb rubber particles as bitumen modifier can be currently considered as a well-established alternative to conventional polymers for bitumen modification. However, Recycle Tyre Rubber (RTR) modified binders still present drawbacks such as poor mix workability and hot storage stability. Within this study the authors try unlocking the full potential of devulcanised tyre rubber-heavy oils blend, named Liquid Rubber (LR), by exploring the possibility of tailoring recycled polymer modified bitumen with unconventional high-content of RTR and designed to overcome the above mentioned technological problems of RTR modified bitumen while keeping its advantages. Results show that LR-b…

An investigation on using pre-treated tyre rubber as a replacement of synthetic polymers for bitumen modification

2015

Rubberized bitumen obtained through a swelling process, has widely proven to be a successful technology for asphalt pavement applications and a solution to reduce the dismantling of tyre rubber on landfills. However, this technology presents two main operative issues which needs the adoption of costly special equipment. Firstly, significant high value of High Temperature Viscosity (HTV) which imposes mixing and compaction difficulties and leads to increased energy consumption and emissions. Furthermore, during the hot storage period, phase separation between rubber particles and the base bitumen could occur. Developing Recycled Tyre Rubber Modified Bitumen (RTR-MBs) with improved storage st…

Serine/Threonine Phosphatase Inhibitors Decrease Adrenergic Arylalkylamine N -Acetyltransferase Induction in the Rat Pineal Gland

2001

Adrenergic regulation of the pineal enzyme serotonin N-acetyltransferase [arylalkylamine N-acetyltransferase (AA-NAT); EC 2.3.1.87] accounts for the circadian rhythm in melatonin formation. In the present study, the role of protein phosphatases in the adrenergic regulation of rat pineal AA-NAT was investigated using specific inhibitors. In cultured pineals, the serine/threonine phosphatase type 1 and type 2A inhibitors okadaic acid and calyculin A significantly decreased adrenergically or cAMP-induced AA-NAT activity, whereas the serine/threonine phosphatase type 2B inhibitor cypermethrin and tyrosine phosphatase inhibitor dephostatin were ineffective. Reverse transcriptase-polymerase chain…

La linguistica vista dalle Alpi. Teoria, lessicografia e multilinguismo

2019

Il volume raccoglie contributi che hanno come principale tema di ricerca la multiforme realtà linguistica dell’ambiente alpino. Essi indagano fenomeni linguistici di lingue standard e di minoranza appartenenti ai gruppi romanzo e germanico. Il libro si compone di quatto sezioni: modelli teorici, valenza e lessicografia, linguistica delle varietà e multilinguismo e le lingue nel Trentino-Alto Adige. The contributions of this book deal with the diverse linguistic situation of the Alps by focusing on phenomena of standard and minority languages which belong to the Romance and Germanic group. They address four main topics which correspond to the four sections of the book: linguistic theory, val…

Italian approaches to self-determination: theory and practice

2015

CAMPANIAN WINE FOR PUNIC SICILY: PETROGRAPHIC AND ARCHAEOLOGICAL STUDIES OF GRAECO-ITALIC AMPHORAE FROM PALERMO

2018

This contribution proposes a combination of archaeological fabric analysis and petrographic research applied to the study of 35 sherds of Graeco-Italic amphorae mostly found in Palermo, but also in Pantelleria and Malta (Tab. 1). The provenance identification derived from both approaches gives evidence for the arrival, in North-Western Sicily, of presumable wine amphorae from central-Tyrrhenian Italy since the very late 4th century BC. The production of the majority of the material has been confidentially attributed to the area of the Gulf of Naples/Ischia, but a second large group originates from several, still unidentified production sites to be located along the coastal strip of Campania…

Have tractor manufacturers bore in mind soil compaction over the last 40 years?

2019

Soil compaction is the compression of soil particles in a lower volume as a consequence of the reduction of the spaces existing among the particles themselves. This phenomenon is caused by natural forces and, above all, human ones. In order to estimate the field damages that can be caused by the traffic of agricultural machines, the load and the mean pressure applied by the tyres onto the soil can be measured. The research aim is to determine the pressure applied by each considered tractor onto the soil, in order to evaluate the effect of the traffic of tractors onto the soil itself. A total of 783 wheeled tractors manufactured and marketed in the last 35 years (1979-2014) was investigated.…

Origin of Insulin Receptor-Like Tyrosine Kinases in Marine Sponges

1999

One autapomorphic character restricted to all Metazoa including Porifera [sponges] is the existence of transmembrane receptor tyrosine kinases (RTKs). In this study we screened for molecules from one subfamily within the superfamily of the insulin receptors. The subfamily includes the insulin receptors (InsR), the insulin-like growth factor I receptors, and the InsR-related receptors--all found in vertebrates--as well as the InsR-homolog from Drosophila melanogaster. cDNAs encoding putative InsRs were isolated from the hexactinellid sponge Aphrocallistes vastus, the demosponge Suberites domuncula, and the calcareous sponge Sycon raphanus. Phylogenetic analyses of the catalytic domains of th…

Nueva era en el combate contra el cáncer: Evolución y cáncer: progreso y tratamiento de tumores

2013

L’oncohematologia ha assistit en les últimes dècades a importants avenços en el tractament i supervivència. La toxicitat derivada de la quimioteràpia clàssica i la necessitat de millorar l’eficàcia i tolerància als tractaments han fet que es desencadene un allau d’activitat investigadora que constantment proporciona fruits. Gran part d’aquest esforç s’ha enfocat al desenvolupament de «teràpies diana» dirigides contra determinades alteracions funcionals, clau per a la supervivència de la cèl·lula tumoral. Així es pretén aconseguir major eficàcia en el tractament i que el pacient pague un menor cost en toxicitat. Avenços en altres disciplines de l’oncologia com l’epidemiologia, la cirurgia i …

Rifted margin formation in the South Tyrrhenian Sea: A high resolution profile across the North Sicily passive continental margin.

2000

A new, 150 km long seismic line across the continental margin of north Sicily has been acquired and interpreted. The overall structure of the margin is controlled by extension, which caused crustal thinning and widespread normal faulting. Two main thinned zones are observed in the south in correspondence with the Cafalù basin and farther to the north at the continent-ocean transition. Zones of thinned crust coincide with zones of intense normal faulting. Extension began in late Tortonian times and caused the opening of the Cefalù basin controlled by a northward dipping listric fault. Messinian stretching affected most of the future margin and provoked a widening of the Cefalù basin and norm…