Search results for " GCMS"
showing 7 items of 7 documents
Hydrological regime modifications induced by climate change in Mediterranean area
2015
The knowledge of river flow regimes has a capital importance for a variety of practical applications, in water resource management, including optimal and sustainable use. Hydrological regime is highly dependent on climatic factors, among which the most important is surely the precipitation, in terms of frequency, seasonal distribution and intensity of rainfall events. The streamflow frequency regime of river basins are often summarized by flow duration curves (FDCs), that offer a simple and comprehensive graphical view of the overall historical variability associated with streamflow, and characterize the ability of the basin to provide flows of various magnitudes. Climate change is likely t…
Future Projection of precipitation changes in the Júcar and Segura River Basins (Iberian Peninsula) by CMIP5 GCMs Local Downscaling
2021
The basins of the Júcar and Segura rivers, on the Mediterranean coast of the Iberian Peninsula, present a special water problem and are of particular interest regarding climate change. These basins are very vulnerable to a possible scenario of decreasing water resources. Recent studies on historic rainfall since 1955 have indicated an ongoing loss of precipitation in their headwaters, especially in the case of the Júcar river. The aim of the present study is to perform climate projections for the precipitation variable for several future periods (2021–2040, 2051–2070, 2081–2100) and emission scenarios (RCPs 4.5, 8.5) within the Júcar and Segura River Basin authorities. For this purpose, a s…
Study on the adsorption of PCBs in alginate Montmorillonite beads by GC-MS analysis
2013
Phthalate esters in products and materials which come into contact with humans. GC-MS analysis
2013
Polycyclic aromatic hydrocarbons (PAHs) in indoor dust matter of Palermo (Italy) area: Extraction, GC–MS analysis,distribution and sources
2008
Abstract Studies on indoor pollution are important since people spend more than 80% of their time indoor environments. In this work the method for PAHs analysis in indoor dust (used as passive sampler) and the results relative to samples collected in the area of Palermo are reported. Dust samples for analysis were collected from 45 indoor environments. Total PAHs concentrations in indoor dusts ranged from 36 to 34 453 μg kg −1 d.w. To correlate indoor and outdoor pollution we analyze, also, the particulate matter and PAHs levels samples collected in four stations. The percentage measured in indoor dusts results more low than that found outside. The values of isomeric ratios for the differe…
Variations in the volatile compounds of a Fennel (Foeniculum vulgare Mill.) variety grown in a semi-arid Mediterranean environment
2005
Fennel is an industrial source of anethole but, recently, further interest has came from the suggested possibility of many industrial uses of this plant. The volatile substances from the seeds of fennel grown in Sparacia (Cammarata - AG - Sicily; 37° 38' N; 13° 46' E) have been investigated and compared on a statistical base with previously reported data. The variety grown in Sparacia fall into the "high fenchone" chemovariety. The substances alpha-toluene, alpha-terpinene, beta-phellandrene + limonene and camphene appear the components most sensitive to environment and grow condition modifications. Fennel is an industrial source of anethole but, recently, further interest has come from the…