oalib

OALib Journal期刊

ISSN: 2333-9721

费用:99美元

投稿

匹配条件: “ Simona Fratianni” ,找到相关结果约1478条。
列表显示的所有文章,均可免费获取
第1页/共1478条
每页显示
Analysis on Long Precipitation Series in Piedmont (North-West Italy)  [PDF]
Fiorella Acquaotta, Simona Fratianni
American Journal of Climate Change (AJCC) , 2013, DOI: 10.4236/ajcc.2013.21002
Abstract:

This study analyses thirteen daily precipitation series of Piedmont, region of North-West Italy. The meteorological series have been chosen because they were meteorological observatories operating continuously from the beginning of 1900 until 2011. As the first step an historical research over each station has been carried out. In this way, the potential breaks, in the series, either due to changes of locations or instruments, have been determined and the missing values have been recovered. On the precipitation daily series a quality control have been effectuated and by metadata identification it was possible to assess the homogeneity of the meteorological series. In this way we have obtained the complete and correct series on which trends have been computed. In order to better understand the consequences of climate variations on our environment and society, we have calculated the climate indices proposed by “CCL/CLIVAR Working Group on Climate Change Detection” (dry and wet days, rainy days, intensity of precipitation…) over the time. The values of precipitation have also allowed beginning the climatic analysis with the aim at defining the principle local peculiarity in Piedmont.

Snow Precipitation and Snow Cover Climatic Variability for the Period 1971–2009 in the Southwestern Italian Alps: The 2008–2009 Snow Season Case Study
Silvia Terzago,Claudio Cassardo,Roberto Cremonini,Simona Fratianni
Water , 2010, DOI: 10.3390/w2040773
Abstract: Snow cover greatly influences the climate in the Alpine region and is one of the most relevant parameters for the climate change analysis. Nevertheless, snow precipitation variability is a relatively underexplored field of research because of the lack of long-term, continuous and homogeneous time series. After a historical research aiming to recover continuous records, three high quality time series of snow precipitation and snow depth recorded in the southwestern Italian Alps were analyzed. The comparison between the climatological indices over the 30 years reference period 1971–2000 and the decade 2000–2009 outlined a general decrease in the amount of snow precipitation, and a shift in the seasonal distribution of the snow precipitation in the most recent period. In the analysis of the last decade snow seasons characteristics, the attention was focused on the heavy snowfalls that occurred in Piedmont during the 2008–2009 snow season: MODerate resolution Imager Spectroradiometer (MODIS) snow cover products were used to evaluate snow cover extension at different times during the snow season, and the results were set in relation to the temperatures.
The Banking Bailout of the Subprime Crisis: Size and Effects
Michele Fratianni
PSL Quarterly Review , 2010,
Abstract: This paper examines government policies aimed at rescuing banks from the effects of the great financial crisis of 2007-2009. To delimit the scope of the analysis, we concentrate on the fiscal side of interventions and ignore, by design, the monetary policy reaction to the crisis. The policy response to the subprime crisis started in earnest after Lehman's failure in mid September 2008, accelerated after February 2009, and has become very large by September 2009. Governments have relied on a portfolio of intervention tools, but the biggest commitments and outlays have been in the form of debt and asset guarantees, while purchases of bad assets have been very limited. We employ event study methodology to estimate the benefits of government interventions on banks and their shareholders. Announcements directed at the banking system as a whole (general) and at specific banks (specific) were priced by the markets as cumulative abnormal rates of return over the selected window periods. General announcements tend to be associated with positive cumulative abnormal returns and specific announcements with negative ones. General announcements exert cross-area spillovers but are perceived by the home-country banks as subsidies boosting the competitive advantage of foreign banks. Specific announcements exert spillovers on other banks. Our results are also sensitive to the information environment. Specific announcements tend to exert a positive impact on rates of return in the pre-crisis sub-period, when announcements are few and markets have relative confidence in the "normal" information flow. The opposite takes place in the turbulent crisis sub-period when announcements are the order of the day and markets mistrust the "normal" information flow. These results appear consistent with the observed reluctance of individual institutions to come forth with requests for public assistance.
Polyphenol Composition, Antioxidant, Antimicrobial and Quorum Quenching Activity of the “Carciofo di Montoro” (Cynara cardunculus var. scolymus) Global Artichoke of the Campania Region, Southern Italy  [PDF]
Florinda Fratianni, Rosa Pepe, Filomena Nazzaro
Food and Nutrition Sciences (FNS) , 2014, DOI: 10.4236/fns.2014.521217
Abstract: Biochemical characteristics, antimicrobial and quorum quenching activity of the extract of the “Carciofo di Montoro”, a typical ecotype of Cynara cardunculus var. scolymus of the Campania region (Southern Italy) were studied, to consider it as potential reserve of bioactive constituents useful for food industry and beneficial for managing and preventing several chronic illnesses in humans. The extract exhibited a good polyphenol content (528 μg GAE/g) and antioxidant activity (EC50 less than 5 mg). Ultra pressure liquid chromatography (UPLC) revealed high amount of chlorogenic acid, cynarin and epicatechin. The extract showed antimicrobial activity against Escherichia coli, Staphylocccus aureus, Pseudomonas aeruginosa, Enterococcus faecalis and Bacillus cereus pathogen strains. Finally, quorum quenching activity was demonstrated. The variety Carciofo di Montoro could represent a good source of health-promoting polyphenols, encouraging a nutraceutical use of such ecotype, for several phyto-pharmaceutical applications.
Polyphenol Composition and Antioxidant Activity of Different Potentially Functional Kale-Based Snacks  [PDF]
Filomena Nazzaro, Federica Cardinale, Autilia Cozzolino, Tiziana Granese, Florinda Fratianni
Food and Nutrition Sciences (FNS) , 2014, DOI: 10.4236/fns.2014.512124
Abstract:

Four types of kale-based snacks were investigated on the basis of polyphenol content and composition, glucosinolates amount, and antioxidant activity. The amount of polyphenols resulted to be higher than that of raw material, fresh kale (0.57 ± 0.03 mg GAE). The antioxidant activity turned out indeed very effective, resulting sufficient just from 0.72 mg to 2.1 mg to dishearten the activity of 1 ml DPPH to 50%. Glucosinolates present in kale-based snacks ranged from 1.17 mg/gr to 1.52 mg of sinigrin equivalent/gr. Polyphenol profile, obtained by UPLC-DAD analysis allowed us to identify gallic acid, chlorogenic acid, and catechin common in all samples. Other polyphenols, that is caffeic acid, p-coumaric acid, and ferulic acid, were found in almost all samples, almost all more abundant than fresh kale, representing a precious source of beneficial metabolites. Our results suggest that such snacks could represent an effective functional dietary supplement also if compared to fresh vegetable. Manufacturing of kale-based snacks does not negatively affect the beneficial effect of the raw material; indeed, such snacks could positively meet people’s expectation, mainly children and young, well known consumers of snacks, which, also in such manner, could be addressed towards a healthier dietary regime.

Quorum Sensing and Phytochemicals
Filomena Nazzaro,Florinda Fratianni,Raffaele Coppola
International Journal of Molecular Sciences , 2013, DOI: 10.3390/ijms140612607
Abstract: Most infectious diseases are caused by bacteria, which proliferate within quorum sensing (QS)-mediated biofilms. Efforts to block QS in bacteria and disrupt biofilms have enabled the identification of bioactive molecules that are also produced by plants. This mini review primarily focuses on natural QS inhibitors, which display potential for treating bacterial infections and also enhance the safety of food supply.
Limited Bandwidths and Correlation Ambiguities: Do They Co-Exist in Galileo Receivers  [PDF]
Elena Simona Lohan
Positioning (POS) , 2011, DOI: 10.4236/pos.2011.21002
Abstract: Galileo is the Global Navigation Satellite System that Europe is building and it is planned to be operational in the next 3-5 years. Several Galileo signals use split-spectrum modulations, such as Composite Binary Offset Carrier (CBOC) modulation, which create correlation ambiguities when processed with large or infinite front-end bandwidths (i.e., in wideband receivers). The correlation ambiguities refer to the notches in the correlation shape (i.e., in the envelope of the correlation between incoming signal and reference modulated code) which happen within +/– 1 chip from the main peak. These correlation ambiguities affect adversely the detection probabilities in the code acquisition process and are usually dealt with by using some form of unambiguous processing (e.g., BPSK-like techniques, sideband processing, etc.). In some applications, such as mass-market applications, a narrowband Galileo receiver (i.e., with considerable front-end bandwidth limitation) is likely to be employed. The question addressed in this paper, which has not been answered before, is whether or not this bandwidth limitation can cope inherently with the ambiguities of the correlation function, to which extent, and which the best design options are in the acquisition process (e.g., in terms of time-bin step and ambiguity mitigation mechanisms).
Efficacy and tolerability of propolis special extract gh 2002 as a lip balm against herpes labialis: a randomized, double-blind three-arm dose finding study  [PDF]
Simona Holcová, Marie Hladiková
Health (Health) , 2011, DOI: 10.4236/health.2011.31010
Abstract: A dose-finding study was performed with respect to the clinical applicability and tolerability of three different concentrations of propolis special extract GH 2002 in a lip balm (0.1%, 0.5% and 1%). The trial was designed as a double-blind, randomized dermatological study in 150 outpatients with Herpes labialis. The primary parameter was the duration in days until painless incrustation in 50% or 90% of the patients (observable in 121 patients). Secondary parameters were local pain (assessed on a visual analogue scale), itching, burning and tension/ swelling on a verbal rating scale, and tolerability. Visits were performed on days 2/3, 5/6 and 8/9. Best efficacy results with shortest healing time (3.4 and 5.4 days in the 50th and 90th percentile, respectively; p = 0.008 vs. 1% and 0.09 vs. 0.1%) and good tolerability were observed with the 0.5% concentration. All three concentrations achieved highly significant therapeutic results in comparison with baseline values (p < 0.0005) for all secondary parameters as early as day 2/3. Analgesia was the most prominent effect for the patients. Conclusion: The 0.5 % concentration of propolis special extract GH 2002 in a lip balm was found to have the best risk-benefit ratio for the treatment of Herpes labialis.
Variation of Polyphenols, Anthocyanins and Antioxidant Power in the Strawberry Grape (Vitis labrusca) after Simulated Gastro-Intestinal Transit and Evaluation of in Vitro Antimicrobial Activity  [PDF]
Tiziana Granese, Federica Cardinale, Autilia Cozzolino, Selenia Pepe, Maria Neve Ombra, Filomena Nazzaro, Raffaele Coppola, Florinda Fratianni
Food and Nutrition Sciences (FNS) , 2014, DOI: 10.4236/fns.2014.51008
Abstract:

The influence of a simulated digestive process on some biochemical and biological aspects of strawberry grape (Vitis labrusca) was investigated. The amount of total polyphenols and anthocyanins as well as the antioxidant power were evaluated. Results evidenced that the simulated gastrointestinal transit caused a decrease of the polyphenols content and total anthocyanins; these last, however, were more resistant than polyphenols, decreasing only of 50% respect to the initial value (31.50 μg/ml of extract). The extract exhibited an excellent antioxidant power (EC50 3.8 mg/ml), which decreased of about four times after the simulated gastrointestinal transit. The antimicrobial activity of the extract, evaluated against three Escherichia coli, Pseudomonas aeruginosa and Bacillus cereus pathogen strains was enhanced by the simulated digestion, with an increase of the inhibition halo.

Polyphenol Composition and Antioxidant Activity of Two Autochthonous Brassicaceae of the Campania Region, Southern Italy  [PDF]
Florinda Fratianni, Federica Cardinale, Autilia Cozzolino, Tiziana Granese, Selenia Pepe, Riccardo Riccardi, Patrizia Spigno, Raffaele Coppola, Filomena Nazzaro
Food and Nutrition Sciences (FNS) , 2014, DOI: 10.4236/fns.2014.51009
Abstract:

Torzella (Brassica oleracea acephala) is one of the most ancient kinds of cauliflower developed in the Mediterranean area. Broccolo (Brassica oleracea botrytis cimosa), var. “San Pasquale” is a leafy vegetable cultivated in Campania too, mainly in the province of Naples. We evaluated the polyphenols content and the antioxidant activity of these two Brassicaceae, provided by the same experimental plant of the Campania region. Both vegetables showed high content of total polyphenols (6.37 mM GAE/g and 2.24 mM GAE/g of Torzella and Broccolo, respectively), and a remarkable antioxidant activity (EC50 1.53 mg and EC50 6.51 mg, in Torzella and Broccolo, respectively). Polyphenol composition, determined by ultra performance liquid chromatography (UPLC), allowed us to detect a certain number of compounds (gallic, ferulic, chlorogenic, p-coumaric and caffeic acids, catechin, luteolin, naringenin) common to both species. Therefore, epicatechin was found only in the extract of san Pasquale broccoli; on the contrary, rutin and apigenin were detected only in the extracts of torzella broccoli. Hence, such products can be considered therapeutic functional foods due to their extraordinary reserve of secondary metabolites and bioactive constituents that are beneficial for managing and preventing several chronic illnesses in humans.

第1页/共1478条
每页显示


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.