1,721,010 research outputs found
LA RIFORMA DELL'ARCHITETTURA DI REGOLAMENTAZIONE FINANZIARIA E IL RUOLO DELLE BANCHE CENTRALI: STATO DELL'ARTE
No full textDopo la crisi. Quali sono oggi le condizioni del sistema bancario e finanziario? Le banche hanno ripreso a svolgere al meglio le loro funzioni nei confronti delle famiglie e delle imprese, e a contribuire nel contempo agli obiettivi generali di stabilità finanziaria e di sviluppo economico? E quali sono in particolare le implicazioni per le banche italiane? In un contesto profondamente mutato, il nuovo Rapporto cerca di rispondere a questi interrogativi, lungo tre direttrici principali: i rapporti tra banche, imprese e mercati; le relazioni con i risparmiatori; il disegno delle regole e della vigilanza
Microbial activity and organic matter composition in Mediterranean humus forms
No full textThe aim of this study was to characterise humus forms, intended as organic profile morphologies, and the associated soil chemical, biochemical (β-glucosidase, phosphatase and urease activities) and organic matter (SOM) properties in Mediterranean forest soils. Samples were collected from the organic layers (OF. +. OH) and the mineral topsoil (M01) in 31 Quercus spp. sites. To highlight the differences in soil organic matter (SOM) composition among humus forms, pyrolysis-gas chromatography (Py-GC) was used and the ratios of specific pyrolysis products were calculated. The main results achieved were that humus forms can be clearly separated according to enzyme activities and SOM pyrolytic fragments of the first mineral layer (M01). Humus forms showed a progression from mull macro, which was the richest in soil nutrients and with the highest enzyme activities, across amphi macro and amphi meso to an opposite end represented by mull meso and moder. This trend was also observed in the qualitative changes of SOM composition. In particular, the high ratios of pyrrole to phenol suggested that in macrostructured humus forms soil organic matter is more degraded, whereas high values of acetic acid and of the aliphatic to aromatic compounds ratio in moder and mull meso forms, indicate accumulation of fresh and biodegradable material. This study points to the high potential of humus forms as indicators of forest soil processes. © 2013 Elsevier B.V
Effects of Hediste diversicolor (Polychaeta, Nereidae) on organic matter mineralization: a preliminary experiment
No full textInteractions between polychaetes and bacterial activity in the sediment: a laboratory experiment
No full textKinetic parameters of dehydrogenase in the assesment of the respons of soil to vermicompost and inorganic fertilizers
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Phytoremediation applied to contaminated sediments: site-specific risk assessment and possible solutions
No full textWhat’s different about loans? An analysis of the risk structure of credit spreads
No full textWhile extensive research on the relationship between credit risk and spreads has been produced for bonds and loans separately, few studies have analysed them jointly. We derive a simple structural model where a stochastic default barrier accounts for informational noise, and differences between bond and loan spreads are explained through the different screening ability of
bankers and bond-holders. We then test the model on a sample of 7,926 Eurobonds and 5,469 syndicated loans. Empirical results confirm the key finding of the model: while spreads increase as ratings worsen for both bonds and loans, the former show a steeper spread/rating relationship
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