Search results for "DF"

Environmental conditions for gravelly and pebbly dunes and sorted bedforms on a moderate-energy inner shelf (Marettimo Island, Italy, western Mediter…

2008

12 pages, 11 figures, 1 table

Using topographical attributes to evaluate gully erosion proneness (susceptibility) in two mediterranean basins: advantages and limitations

2015

Empirical multivariate predictive models represent an important tool to estimate gully erosion susceptibility. Topography, lithology, climate, land use and vegetation cover are commonly used as input for these approaches. In this paper, two multivariate predictive models were generated for two gully erosion processes in San Giorgio basin (Italy) and Mula River basin (Spain) using only topographical attributes as independent variables. Initially, nine models (five for San Giorgio and four for Mula) with pixel sizes ranging from 2 to 50 m were generated, and validation statistics were calculated to estimate the optimal pixel size. The best models were selected based on model performance using…

Geomorphology of the Capo San Vito Peninsula (NW Sicily): An Example of Tectonically and Climatically Controlled Landscape

2017

The Capo San Vito peninsula is located along the north-westernmost sector of the Sicilian coastline. It is characterized by a complex geomorphological setting, where a large variety of coastal, gravity-induced and karst landforms allow the visitor to easily detect the interactions between Quaternary tectonics and climate changes as well as morphodynamic processes responsible for shaping the landscape. Thanks to natural reserves, the peninsula preserves a typical Mediterranean natural environment, marked by spectacular and suggestive landforms.

Relationships between a new slope morphometric index and calanchi erosion in northern Sicily, Italy

2012

The Italian badlands, or “calanchi”, are common landforms in Mediterranean areas including central and southern Italy. Calanchi landforms may be compared to small hydrographic basins. These landforms are characterised by dense, hierarchical and rapidly evolving drainage systems carved into steep clayey slopes and by a sharply alternating pattern of furrows and narrow, generally sharp crests. This work presents a study of morphometric characteristics and a statistical analysis for two sites in northern Sicily (Italy), on outcrops of silty-clay deposits affected by active erosion processes, which give this area a typical calanchi landscape. In particular, factors closely linked to the charact…

A narrative review of positive psychology interventions for women during the perinatal period

2019

Recent studies suggest that positive perinatal maternal mood can buffer the effects of negative feelings and promote women and infant well-being. Evidence from Positive Psychology has shown that Positive Psychology Interventions (PPIs) can enhance well-being and/or reduce negative symptoms. The objective of this comprehensive narrative review was to identify and critically review the current evidence about the use of PPIs designed to improve women's mental well-being during the perinatal period. A systematic search of four online databases was conducted. Two intervention programmes have been identified. Both interventions were online-based and gratitude was the common PPI. The common target…

Adducts of free-base meso-tetraarylporphyrins with trihaloacetic acids: Structure and photostability

2020

Abstract Four diverse meso-tetraarylporphyrins in the form of diprotonated adducts with trifluoro-, trichloro-, tribromoacetic acids and acetic acid were investigated in benzene solution. Despite similar structural distortion of the chromophore system due to protonation, the respective adducts demonstrated different photostability when exposed to UV irradiation. The trifluoro- and trichloroacetic adducts, and the acetic acid one, showed some common features both molecular and in the mechanism of photodegradation. However, the tribromo-derivative decayed according to a different kinetic scheme, revealing a considerable impact of the bromine atoms upon the pyrrole units of the porphyrin macro…

RELATIONSHIP BETWEEN MAXIMAL FAT OXIDATION AND OXYGEN UPTAKE: COMPARISON BETWEEN PATIENTS WITH TYPE 2 DIABETES AND HEALTHY SEDENTARY SUBJECTS

2014

The contribution of fat oxidation to energy production during exercise is influenced by intensity of exercise. The aim of this study was to assess the relationship between the highest value of fat oxidation rate (FATmax) and the oxygen uptake (VO2) in sedentary type 2 diabetes (T2D) patients vs healthy sedentary subjects. Sedentary T2D patients and healthy sedentary subjects were evaluated to a graded exercise test, and oxygen uptake and fat oxidation rate were detected. Data show that in T2D patients fat oxidation rate is not impaired and the positive linear correlation between FATmax and both VO2 and VO2max suggests that even in T2D patients the muscle oxidative capacity might increase in…

DETERMINATION OF MAXIMAL FAT OXIDATION FOR PRESCRIBING EXERCISE IN SEDENTARY NON-OBESE TYPE 2 DIABETES SUBJECTS

2014

Aim: To determine the exercise intensity that elicits the highest fat oxidation rate in sedentary non-obese subjects with type 2 diabetes. Methods: Eleven sedentary subjects with type 2 diabetes (T2DS) and eleven healthy sedentary subjects (HS), aged 45 to 65 and non-obese, were evaluated to a graded exercise test. Oxygen uptake (VO2) and fat oxidation rate (FAT) were detected. FAT was then plotted as a function of exercise intensity, expressed as percentage of VO2max. We determined the exercise intensity (%VO2max) at which fat oxidation was maximal (FATmax). Results: Absolute FATmax was not significantly different between T2DS and HS (0.51  0.13 vs. 0.56  0.29 g∙min-1). FATmax occurred a…

RELAZIONI TRA FATTORI AMBIENTALI, STILI DI VITA E METABOLISMO ENERGETICO NEI SOGGETTI OBESI

Assignment of complex species by affinity capillary electrophoresis: The case of Th(IV)‐desferrioxamine B

2020

International audience; The electrophoretic mobility change of desferrioxamine B (DFO) was monitored by UV absorption spectrophotometry upon increasing the thorium(IV) concentration in the background electrolyte at two acidities ([HClO4]Tot = 0.0316 and 0.0100 M). These data enabled to assess the speciation model and to determine the equilibrium constant of [Th(DFO)H2]3+ at fixed ionic strength (I = 0.1 M (H,Na)ClO4). Affinity capillary electrophoresis (ACE) turned out to be most helpful in identifying the complexed species by ascertaining its charge and protonation state. The assignment of the correct stoichiometry relied on the reliable estimation of the electrophoretic mobility by assumi…