Search results for "LONG"
showing 10 items of 3969 documents
Influence of long chain branching on the elongational behaviour of different polyethylenes and their blends
1986
Elongational data on a series of polyethylenes with different structure and on their blends are presented in order to correlate the extensional behaviour with the long chain branching degree.
Recycling of heterogeneous plastics wastes. II—The role of modifier agents
1993
Abstract Recycling of mixed plastics waste, mainly composed of PEs, PET and PVC has been carried out by blending with recycled polyethylene. Although the extrusion of these blends has been carried out at high temperatures, the degradation of the PVC was modest due to the short residence times. The mechanical properties of these secondary materials, up to about 30% of mixed plastics waste, are very similar to those of the recycled polyethylene, except for the elongation to break. By adding some modifier agents, the elongation at break and especially the impact strength can be further improved.
Influence of molecular parameters on the elongational behaviour of different polyethylenes and their blends
1988
Elongational data on a large number of polyethylene samples with different structures and their blends are presented in order to evaluate the influence of the molecular weight and molecular weight distribution for a given degree of long chain branching. The elongational viscosity rises with the number of branch points and also with molecular weight and molecular weight distribution. Simple relationships between elongational viscosity at a given deformation and molecular parameters are presented.
Resveratrol in Experimental Models and Humans
2018
Abstract The search for natural compounds with beneficial activity for health has been one of the great challenges since men are aware of their survival. Many elixirs and ointments have been tested as the possible treatment or remedy for diseases or even death. In traditional medicine, compounds with biological activities have been used in humans. Among them, resveratrol (RSV) is, currently, one of the most studied natural compounds by modern science. To study this polyphenol we have a series of very useful tools that allow us to investigate from molecular targets, to signaling pathways in which it is involved, as well as effects on pathologies and even health and longevity. In this chapter…
Studying poverty over time: an analysis by gender and age in Europe
2013
This paper aims to communicate a new conceptualization of persistent poverty used to build the class of longitudinal poverty indices by Mendola et al.(2011), and to show how these indices could be helpful in analyzing the characteristics of persistence of poverty among generations. The indices are based upon the idea that the longer the sequence of consecutive high poverty gaps is, the worse the situation experienced. Moreover they introduce, via a parameter, the idea that the evaluation of the individual experiences of poverty must take into account the poverty mobility in the society. An empirical application on European Community Household Panel data compare the contributions of each gen…
The importance of consecutive spells of poverty: a longitudinal poverty index
2009
Traditional measures of poverty persistence, such as ’poverty rate’ (i.e., the number of years spent in poverty upon the total number of observations) or the ’persistent-risk-of-poverty rate’, do not devote enough attention to the sequence of poverty spells. In particular, they are insufficient in underlining the different effects associated with occasional single spells of poverty and the consecutive years of poverty. Here, we propose a new index which measures the severity of poverty, taking into account the way poverty and non-poverty spells follow one another along individual life courses. The index is normalized and increases with the number of consecutive years in poverty along the se…
Cildenā kategorija Svetonija vēsturiskajās biogrāfijās „De vita Ceasarum”
2015
Maģistra darbā Cildenā kategorija Svetonija vēsturiskajās biogrāfijās “De Vita Caesarum” tiek pētītas Svetonija rakstītās valdnieku biogrāfijas. Darbā tiek apskatītas cildenā kategorijas un to izpausmes biogrāfiju tekstā no cilvēciskā un valodas aspekta. Kategorijas ir izvēlētas, analizējot Longīna traktāta Par cildeno saturu un tur atspoguļotās cildenās īpašības. Viena analīzes daļa balstās cilvēciskajā aspektā uz traktātā Par cildeno minētajām īpašībām, kādas piemīt cildenam cilvēkam. Valodas aspektā analīzē runāts par cildenu valodas stilu un to veidojošajiem elementiem, kādi ir iztirzāti Longīna traktātā. Darba mērķis ir atklāt cildeno gan Svetonija aprakstīto valdnieku biogrāfijās, gan…
Estudio estructural de la mucosa respiratoria post intubación orotraqueal
2012
La obstrucción vía aérea es la causa de muerte mas frecuente en el paciente politraumatizado. La intubación orotraqueal es la maniobra más eficaz para permeabilizar la via aérea siempre que la vía aérea superior sea permeable. La principal indicación de la intubación orotraqueal es la patología quirúrgica. La morbilidad asociada está en estrecha relación con los daños que ocasiona sobre la mucosa traqueal y con el tiempo de intubación. Hay muy pocos trabajos que han graduado el daño en la estructura traqueal post intubación a nivel histolopatológico y a nivel ultraestructural solo con microscopio electrónico de barrido. Material y métodos: Se han estudiado biopsias del tercio anterior de 2º…
The Black Mediterranean: A View from Sicily
2021
While Italy has recently experienced nationalist drives, Sicily and in particular the City of Palermo, one of the major ports of refuge for countless migrants arriving in Europe from the African shores, has distinguished itself as an experimental site where to rethink and challenge notions of residence, mobility, citizenship and belonging. Through a series of cultural initiatives, Palermo has become a hub for frontline artists, writers, intellectuals, and activists who have gathered to explore the historically and contemporary ways in which black voices have been silenced and black bodies have been ambiguously imagined in Western-dominated global culture. Investigating these questions is fu…
Longitudinal associations of physical activity and pubertal development with academic achievement in adolescents.
2020
Highlights • Boys with higher levels of moderate-to-vigorous physical activity had better academic achievement than those with lower levels of physical activity at baseline. • Physical activity was not associated with academic achievement at follow-up in boys or girls. • Continuously inactive adolescents had poorer academic achievement over the follow-up period than their more active peers. • Girls with more advanced pubertal status had better academic achievement than other girls.