antonio della valle - Academia.edu (original) (raw)
Papers by antonio della valle
Metabolomics, Jul 20, 2022
Introduction Glycerol is a byproduct from the biodiesel industry that can be biotransformed by Es... more Introduction Glycerol is a byproduct from the biodiesel industry that can be biotransformed by Escherichia coli to high added-value products such as succinate under aerobic conditions. The main genetic engineering strategies to achieve this aim involve the mutation of succinate dehydrogenase (sdhA) gene and also those responsible for acetate synthesis including acetate kinase, phosphate acetyl transferase and pyruvate oxidase encoded by ackA, pta and pox genes respectively in the ΔsdhAΔack-ptaΔpox (M4) mutant. Other genetic manipulations to rewire the metabolism toward succinate consist on the activation of the glyoxylate shunt or blockage the pentose phosphate pathway (PPP) by deletion of isocitrate lyase repressor (iclR) or gluconate dehydrogenase (gnd) genes on M4-ΔiclR and M4-Δgnd mutants respectively. Objective To deeply understand the effect of the blocking of the pentose phosphate pathway (PPP) or the activation of the glyoxylate shunt, metabolite profiles were analyzed on M4-Δgnd, M4-ΔiclR and M4 mutants. Methods Metabolomics was performed by FT-IR and GC-MS for metabolite fingerprinting and HPLC for quantification of succinate and glycerol. Results Most of the 65 identified metabolites showed lower relative levels in the M4-ΔiclR and M4-Δgnd mutants than those of the M4. However, fructose 1,6-biphosphate, trehalose, isovaleric acid and mannitol relative concentrations were increased in M4-ΔiclR and M4-Δgnd mutants. To further improve succinate production, the synthesis of mannitol was suppressed by deletion of mannitol dehydrogenase (mtlD) on M4-ΔgndΔmtlD mutant that increase ~ 20% respect to M4-Δgnd. Conclusion Metabolomics can serve as a holistic tool to identify bottlenecks in metabolic pathways by a non-rational design. Genetic manipulation to release these restrictions could increase the production of succinate. Escherichia coli • Metabolomics • Succinic acid • TCA cycle • GC-MS and mannitol dehydrogenase (MtlD) * Antonio Valle
Journal of Oral Pathology and Medicine, 2002
Response to Gonzalez-Moles, Morales-Garcia and Rodriguez-Archilla: The treatment of oral apthous ... more Response to Gonzalez-Moles, Morales-Garcia and Rodriguez-Archilla: The treatment of oral apthous ulceration or erosive lichen planus with topical clobetasol propionate in three preparations. A clinical study on 54 patients
Journal of Oral Pathology and Medicine, 2002
Background: This study evaluated the clinical use of a corticosteroid in three preparations (topi... more Background: This study evaluated the clinical use of a corticosteroid in three preparations (topical clobetasol propionate ointment, clobetasol propionate in an oral analgesic base, and clobetasol propionate in an adhesive denture paste). Methods: Fifty-four patients (34 males and 20 females) with a history of vesiculo-ulcero-erosive oral lesions were selected: 24 with oral erosive lichen planus and 30 with aphthae. The subjects enrolled were randomly divided into three groups, each of 18 patients (10 with aphthae and 8 with lichen planus): the first was treated with topical clobetasol propionate ointment (0.05%) directly on the lesion(s) three times a day; the second with clobetasol propionate in an adhesive denture paste in equal amounts (1:1) two times a day; the third with clobetasol propionate in an oral analgesic base (Orabase-B) in equal amounts (1:1) two times a day. Each subject scored his or her symptoms daily from most severe (7) to none (0) by verbal assessments using a categorical scale. Results: In all cases, the administration of the corticosteroid was effective in producing remission of symptoms in each group of patients. Significant differences (P∞0.05) between groups were determined by the Kruskal-Wallis test. The Dunn test was used in order to detect which group differs from the others; clobetasol and adhesive denture paste correlated with an early remission of pain in lichen and apthous lesions. Conclusion: The results suggest that topical application of clobetasol in an adhesive denture paste is an effective drug for symptomatic oral vesiculo-erosive and/or ulcerative lesions.
Biotechnology Journal, 2015
Biodiesel has emerged as an environmentally friendly alternative to fossil fuels; however, the lo... more Biodiesel has emerged as an environmentally friendly alternative to fossil fuels; however, the low price of glycerol feed-stocks generated from the biodiesel industry has become a burden to this industry. A feasible alternative is the microbial biotransformation of waste glycerol to hydrogen and ethanol. Escherichia coli, a microorganism commonly used for metabolic engineering, is able to biotransform glycerol into these products. Nevertheless, the wild type strain yields can be improved by rewiring the carbon flux to the desired products by genetic engineering. Due to the importance of the central carbon metabolism in hydrogen and ethanol synthesis, E. coli single null mutant strains for enzymes of the TCA cycle and other related reactions were studied in this work. These strains were grown anaerobically in a glycerol-based medium and the concentrations of ethanol, glycerol, succinate and hydrogen were analysed by HPLC and GC. It was found that the reductive branch is the more relevant pathway for the aim of this work, with malate playing a central role. It was also found that the putative C4-transporter dcuD mutant improved the target product yields. These results will contribute to reveal novel metabolic engineering strategies for improving hydrogen and ethanol production by E. coli.
Journal of Oral and Maxillofacial Surgery, 2003
This study evaluated the effectiveness of a protocol using platelet-rich plasma (PRP) to prevent ... more This study evaluated the effectiveness of a protocol using platelet-rich plasma (PRP) to prevent bleeding after dental extraction in patients treated with anticoagulant oral therapy. Forty patients with mechanical heart-value replacement who were treated with anticoagulant oral therapy were selected for the study. Each patient was treated with PRP gel placed into residual alveolar bone after extraction without heparin administration after suspension of oral anticoagulant drugs (36 hours). Only 2 patients reported hemorrhagic complications (5%). Sixteen patients (40%) had mild bleeding that was easy to control with hemostatic topical agents; this mild bleeding terminated completely 1 to 3 days after the surgical procedures. The remaining 22 patients (55%) presented with adequate hemostasis. Oral surgery in heart surgical patients under oral anticoagulant therapy may be facilitated with PRP gel. Its use is an advanced and safe procedure. This biological and therapeutical improvement can simplify systemic management and help avoid hemorrhagic and/or thromboembolic complications.
SUPERNOVA 2001dy IN MCG +04-40-16 T. Puckett and M. Marcus, Mountain Town, GA, report the discove... more SUPERNOVA 2001dy IN MCG +04-40-16 T. Puckett and M. Marcus, Mountain Town, GA, report the discovery of an apparent supernova (mag 18.0) on an unfiltered CCD frame (limiting mag 19.4) taken with the Puckett Observatory 0.30-m automated patrol telescope on Aug. 27.12 UT. SN 2001dy is located at α = 17 h 04 m 59 s .42, δ = +23 o 10 ′ 06 ′′ .2 (equinox 2000.0), which is 5 ′′ .9 west and 2 ′′ .8 south of the center of MCG +04-40-16. The new object was confirmed on CCD frames taken on Aug. 28.07 by Puckett with a 0.60-m reflector. SN 2001dy is not present on images taken Astronomy Department, Padua, write: "A reduced CCD spectrum (range 380-770 nm, resolution 2.5 nm) of SN 2001dr (cf. IAUC 7684), obtained on Aug. 25.83 UT with the Asiago 1.82-m telescope (+ AFOSC), is that of a type-II supernova, ∼ 1 week after maximum light. The spectrum shows a broad Hα emission with a P-Cyg absorption having a minimum measured at 649.7 nm. Adopting the NASA/IPAC Extragalactic Database recession velocity for NGC 4932 of 7088 km/s, we find an expansion velocity of ∼ 9800 km/s." V857 CENTAURI J. J. M. in 't Zand, Astronomical Institute, Utrecht University, and Space Research Organization Netherlands (SRON), Utrecht; R. Mewe and J. Heise, SRON, write: "Analysis of archival data from the Wide Field Cameras on BeppoSAX has revealed an energetic x-ray flare from a position consistent with that of V857 Cen = Gliese 431, a dM4.5e star (V = 11.5) at a distance of 10.5 pc that was seen to flare once before in the optical (Doyle et al. 1990, A.Ap. Suppl. 86, 403). The x-ray flare occurred on May 28.739 UT, had a rise time of 1 to 3 min, and lasted at least 12 min. After a data gap from 12 to 88 min after the onset, the flare was over. The peak luminosity is 3 × 10 31 erg s −1 cm −2 (2-28 keV), and the fluence at least 2 × 10 34 ergs. The spectral shape is consistent with thermal bremsstrahlung at 11 ± 4 keV. This is the only flare detected from Gl 431 above 1 × 10 31 erg s −1 cm −2 in 1 month of net exposure time over the past five years."
Advances in Science and Research, 2014
ABSTRACT We compare the sea surface wind fields forecasted by a Global Circulation Model (GCM) an... more ABSTRACT We compare the sea surface wind fields forecasted by a Global Circulation Model (GCM) and three Limited Area Models (LAMs) in an operational-like set-up, with the wind remotely sensed by the NASA QuikSCAT scatterometer. The comparison is performed for a single case of Bora wind in the Adriatic Sea, with the purpose to understand the ability of the model forecasts in reproducing the mesoscale features captured by the scatterometer, and to investigate on the suitability of LAM and GCM forecasts as possible forcing in storm surge models (SSMs). The performance is evaluated by means of statistical parameters regarding wind speed and direction showing that, at least in terms of classical statistical parameters, the GCM offer the most advantageous choice in terms of cost/benefit.
In the framework of the Italian flagship project RITMARE (http://www.ritmare.it/en/) an Operation... more In the framework of the Italian flagship project RITMARE (http://www.ritmare.it/en/) an Operational Oceanography Systems (OOS hereafter) based on high resolution 3D hydrodynamic model has been developed for the Oristano Gulf (Sardinia, Italy), with the aim of making short term predictions of water currents and pollutant transport. Atmospheric data provided by the SKIRON meteorological model system (http://forecast.uoa.gr/) were used to make the predictions. In order to asses the quality of the wind field adopted to force the hydrodynamic model, a coastal wind measuring system (WMS hereafter) was developed. The WMS is composed by five three-components anemometers located along the Gulf coasts, which provide hourly and operationally wind measurements. These data are then used operationally to derive high resolution wind fields over the entire Gulf and surrounding coastal areas. The modelled wind data have been compared with the measured ones and the meteorological model accuracy estim...
We exploited a multi-wavelength approach devoted to the study of the evolution of a far-IR select... more We exploited a multi-wavelength approach devoted to the study of the evolution of a far-IR selected, complete sample of galaxies on which numerous studies of galaxy evolution still rely. Thanks to our ISOCAM and optical/near-IR observations, our sample, which provides a direct link between the IRAS and ISO surveys, and the forthcoming deeper Spitzer Extragalactic First Look Survey and AKARI
Shelf types of dense-water formation (DWF) processes occur frequently in the Northern Adriatic Se... more Shelf types of dense-water formation (DWF) processes occur frequently in the Northern Adriatic Sea (NA), due to specific synoptic conditions and wind patterns, mostly related to the blowing of cold and severe Bora winds, advecting cold and dry air from north-eastern Europe, down the Dinaric Alps. The use of low-resolution modelled winds is not able to properly reproduce the fine scale features typical of this basin, particularly in the case of the cross-basin Bora patterns, being the complex Adriatic orography ioften poorly reproduced in atmospheric models.Therefore, in order to understand and model the processes of DWF in the NA, it is mandatory to use high-resolution meteorological and circulation models. Within the framework of activities of the Italian flagship Project "RITMARE" and of the FIRB "DECAL- OGO", several numerical meteorological models at high resolution are made available to describe events of exceptionally dense water formation, such as that reg...
When microclimate analysis in Palazzo Grimani started, paintings in the Apollo Room were in good ... more When microclimate analysis in Palazzo Grimani started, paintings in the Apollo Room were in good condition, except for some parts of the vault near the outside wall, where stuccoes and paintings were heavily damaged due to water presence. Decay causes could be related to three different factors: condensation, moisture passing through the wall, rainwater infiltration from the corresponding room on the upper floor. An environmental monitoring was made surveying air temperature (T), relative humidity (RH), walls, ceiling and floor surfaces temperature using IR and contact sensors, heat and water vapor transfers between walls and air calculating mixing ratio (MR) gradients and finally, using sonic anemometry, the air flow strength and direction near the walls and in the center of the room to individuate and make clear which of the three hypotheses was the real cause of decorations decay. The performed analyses excluded capillary rise although it still remains a problem on the lower floo...
Ground-based and Airborne Telescopes IV, 2012
ABSTRACT Since 2011 a new differential image motion monitor (DIMM) works at Roque de los Muchacho... more ABSTRACT Since 2011 a new differential image motion monitor (DIMM) works at Roque de los Muchachos Observatory close to Telescopio Nazionale Galileo (TNG). The purpose of this instrument is to provide useful information about the optical turbulence for the astronomical observations at TNG. We present the instrument and the first statistical results including a relationship between the principal components analysis of local-ground atmospheric parameters and seeing.
SUPERNOVA 2004K IN ESO 579-G22 Further to IAUC 8272, J. Graham and W. Li report the LOSS discover... more SUPERNOVA 2004K IN ESO 579-G22 Further to IAUC 8272, J. Graham and W. Li report the LOSS discovery, on KAIT images taken on Jan. 19.6 (mag ∼ 17.2) and 21.5 UT (mag ∼ 17.1), of an apparent supernova located at α = 14 h 23 m 39 s .85, δ = −19 o 26 ′ 50 ′′ .0 (equinox 2000.0), which is 15 ′′ .5 west and 11 ′′ .8 south of the nucleus of ESO 579-G22. A KAIT image taken on 2003 July 1.2 showed nothing at this position (limiting mag ∼ 19.0). on behalf of the ERTN (IAUC 7987), report, from inspection of spectra obtained on Jan. 21.15 UT with the Calar Alto 2.2-m reflector (+ CAFOS; range 380-880 nm; resolution 1.1 nm), and Jan. 21.18 with the Asiago 1.8-m telescope (+ AFOSC; range = 355-780 nm, resolution 2.4 nm), that SN 2004G (IAUC 8272) is a type-II supernova, ∼ 5 months after explosion. The expansion velocities deduced from the Hα and Hβ absorptions are ∼ 6600 and 4300 km/s, respectively. SUPERNOVA 2004H IN IC 708 C. L. Gerardy and G. H. Marion, University of Texas at Austin, report that a low-resolution optical spectrogram (resolution 600; range 430-700 nm) of SN 2004H (cf. IAUC 8272), obtained on Jan. 22.35 UT with the 2.7-m Harlan J. Smith Telescope (+ LCS spectrograph) at
NWP WIND TUNING METHODOLOGY: Scatterometers have low temporal coverage (1,5 datum/day maximum in ... more NWP WIND TUNING METHODOLOGY: Scatterometers have low temporal coverage (1,5 datum/day maximum in the Adriatic Sea) and irregular revisitation time, preventing the direct use of scatterometer wind as forcing into storm surge models. Nevertheless, it is possible to extract information on the NWP model wind biases. We used these information to tune the NWP wind fields forcing the SHYFEM storm surge model (https://sites.google.com/site/shyfem/home). The process is described below. 1) The mean scatt-model wind speed relative bias Δws and direction Δθ bias, i.e.
The presence of fog is a frequent problem in the Po Valley. The consequent reduction in visibilit... more The presence of fog is a frequent problem in the Po Valley. The consequent reduction in visibility has a strong impact on the road, air, ship and railway traffic. Both, fog monitoring and forecasting, constitute significant challenges, not least due to the high spatial and temporal variability of the phenomenon. ARPAV (Regional Agency for Environmental Prevention and Protection of Veneto)
A new optical sensor for the continuous monitoring of the dew formation inside organ pipes was de... more A new optical sensor for the continuous monitoring of the dew formation inside organ pipes was designed. This aspect is particularly critical for the conservation of organs in unheated churches since the dew formation or the condensation on the pipe surfaces can contribute to many kinds of physical and chemical disruptive mechanisms. The working principle is based on the change in the reflectivity which is observed on the surface of the fibre tip, when a water layer is formed on its distal end. Intensity changes of the order of 35% were measured, following the formation of the water layer on the distal end of a 400/430 μm optical fibre. Long-term tests carried out placing the fibre tip inside the base of an in-house-made metallic foot of an organ pipe located in an external environment revealed the consistency of the proposed system.
Metabolomics, Jul 20, 2022
Introduction Glycerol is a byproduct from the biodiesel industry that can be biotransformed by Es... more Introduction Glycerol is a byproduct from the biodiesel industry that can be biotransformed by Escherichia coli to high added-value products such as succinate under aerobic conditions. The main genetic engineering strategies to achieve this aim involve the mutation of succinate dehydrogenase (sdhA) gene and also those responsible for acetate synthesis including acetate kinase, phosphate acetyl transferase and pyruvate oxidase encoded by ackA, pta and pox genes respectively in the ΔsdhAΔack-ptaΔpox (M4) mutant. Other genetic manipulations to rewire the metabolism toward succinate consist on the activation of the glyoxylate shunt or blockage the pentose phosphate pathway (PPP) by deletion of isocitrate lyase repressor (iclR) or gluconate dehydrogenase (gnd) genes on M4-ΔiclR and M4-Δgnd mutants respectively. Objective To deeply understand the effect of the blocking of the pentose phosphate pathway (PPP) or the activation of the glyoxylate shunt, metabolite profiles were analyzed on M4-Δgnd, M4-ΔiclR and M4 mutants. Methods Metabolomics was performed by FT-IR and GC-MS for metabolite fingerprinting and HPLC for quantification of succinate and glycerol. Results Most of the 65 identified metabolites showed lower relative levels in the M4-ΔiclR and M4-Δgnd mutants than those of the M4. However, fructose 1,6-biphosphate, trehalose, isovaleric acid and mannitol relative concentrations were increased in M4-ΔiclR and M4-Δgnd mutants. To further improve succinate production, the synthesis of mannitol was suppressed by deletion of mannitol dehydrogenase (mtlD) on M4-ΔgndΔmtlD mutant that increase ~ 20% respect to M4-Δgnd. Conclusion Metabolomics can serve as a holistic tool to identify bottlenecks in metabolic pathways by a non-rational design. Genetic manipulation to release these restrictions could increase the production of succinate. Escherichia coli • Metabolomics • Succinic acid • TCA cycle • GC-MS and mannitol dehydrogenase (MtlD) * Antonio Valle
Journal of Oral Pathology and Medicine, 2002
Response to Gonzalez-Moles, Morales-Garcia and Rodriguez-Archilla: The treatment of oral apthous ... more Response to Gonzalez-Moles, Morales-Garcia and Rodriguez-Archilla: The treatment of oral apthous ulceration or erosive lichen planus with topical clobetasol propionate in three preparations. A clinical study on 54 patients
Journal of Oral Pathology and Medicine, 2002
Background: This study evaluated the clinical use of a corticosteroid in three preparations (topi... more Background: This study evaluated the clinical use of a corticosteroid in three preparations (topical clobetasol propionate ointment, clobetasol propionate in an oral analgesic base, and clobetasol propionate in an adhesive denture paste). Methods: Fifty-four patients (34 males and 20 females) with a history of vesiculo-ulcero-erosive oral lesions were selected: 24 with oral erosive lichen planus and 30 with aphthae. The subjects enrolled were randomly divided into three groups, each of 18 patients (10 with aphthae and 8 with lichen planus): the first was treated with topical clobetasol propionate ointment (0.05%) directly on the lesion(s) three times a day; the second with clobetasol propionate in an adhesive denture paste in equal amounts (1:1) two times a day; the third with clobetasol propionate in an oral analgesic base (Orabase-B) in equal amounts (1:1) two times a day. Each subject scored his or her symptoms daily from most severe (7) to none (0) by verbal assessments using a categorical scale. Results: In all cases, the administration of the corticosteroid was effective in producing remission of symptoms in each group of patients. Significant differences (P∞0.05) between groups were determined by the Kruskal-Wallis test. The Dunn test was used in order to detect which group differs from the others; clobetasol and adhesive denture paste correlated with an early remission of pain in lichen and apthous lesions. Conclusion: The results suggest that topical application of clobetasol in an adhesive denture paste is an effective drug for symptomatic oral vesiculo-erosive and/or ulcerative lesions.
Biotechnology Journal, 2015
Biodiesel has emerged as an environmentally friendly alternative to fossil fuels; however, the lo... more Biodiesel has emerged as an environmentally friendly alternative to fossil fuels; however, the low price of glycerol feed-stocks generated from the biodiesel industry has become a burden to this industry. A feasible alternative is the microbial biotransformation of waste glycerol to hydrogen and ethanol. Escherichia coli, a microorganism commonly used for metabolic engineering, is able to biotransform glycerol into these products. Nevertheless, the wild type strain yields can be improved by rewiring the carbon flux to the desired products by genetic engineering. Due to the importance of the central carbon metabolism in hydrogen and ethanol synthesis, E. coli single null mutant strains for enzymes of the TCA cycle and other related reactions were studied in this work. These strains were grown anaerobically in a glycerol-based medium and the concentrations of ethanol, glycerol, succinate and hydrogen were analysed by HPLC and GC. It was found that the reductive branch is the more relevant pathway for the aim of this work, with malate playing a central role. It was also found that the putative C4-transporter dcuD mutant improved the target product yields. These results will contribute to reveal novel metabolic engineering strategies for improving hydrogen and ethanol production by E. coli.
Journal of Oral and Maxillofacial Surgery, 2003
This study evaluated the effectiveness of a protocol using platelet-rich plasma (PRP) to prevent ... more This study evaluated the effectiveness of a protocol using platelet-rich plasma (PRP) to prevent bleeding after dental extraction in patients treated with anticoagulant oral therapy. Forty patients with mechanical heart-value replacement who were treated with anticoagulant oral therapy were selected for the study. Each patient was treated with PRP gel placed into residual alveolar bone after extraction without heparin administration after suspension of oral anticoagulant drugs (36 hours). Only 2 patients reported hemorrhagic complications (5%). Sixteen patients (40%) had mild bleeding that was easy to control with hemostatic topical agents; this mild bleeding terminated completely 1 to 3 days after the surgical procedures. The remaining 22 patients (55%) presented with adequate hemostasis. Oral surgery in heart surgical patients under oral anticoagulant therapy may be facilitated with PRP gel. Its use is an advanced and safe procedure. This biological and therapeutical improvement can simplify systemic management and help avoid hemorrhagic and/or thromboembolic complications.
SUPERNOVA 2001dy IN MCG +04-40-16 T. Puckett and M. Marcus, Mountain Town, GA, report the discove... more SUPERNOVA 2001dy IN MCG +04-40-16 T. Puckett and M. Marcus, Mountain Town, GA, report the discovery of an apparent supernova (mag 18.0) on an unfiltered CCD frame (limiting mag 19.4) taken with the Puckett Observatory 0.30-m automated patrol telescope on Aug. 27.12 UT. SN 2001dy is located at α = 17 h 04 m 59 s .42, δ = +23 o 10 ′ 06 ′′ .2 (equinox 2000.0), which is 5 ′′ .9 west and 2 ′′ .8 south of the center of MCG +04-40-16. The new object was confirmed on CCD frames taken on Aug. 28.07 by Puckett with a 0.60-m reflector. SN 2001dy is not present on images taken Astronomy Department, Padua, write: "A reduced CCD spectrum (range 380-770 nm, resolution 2.5 nm) of SN 2001dr (cf. IAUC 7684), obtained on Aug. 25.83 UT with the Asiago 1.82-m telescope (+ AFOSC), is that of a type-II supernova, ∼ 1 week after maximum light. The spectrum shows a broad Hα emission with a P-Cyg absorption having a minimum measured at 649.7 nm. Adopting the NASA/IPAC Extragalactic Database recession velocity for NGC 4932 of 7088 km/s, we find an expansion velocity of ∼ 9800 km/s." V857 CENTAURI J. J. M. in 't Zand, Astronomical Institute, Utrecht University, and Space Research Organization Netherlands (SRON), Utrecht; R. Mewe and J. Heise, SRON, write: "Analysis of archival data from the Wide Field Cameras on BeppoSAX has revealed an energetic x-ray flare from a position consistent with that of V857 Cen = Gliese 431, a dM4.5e star (V = 11.5) at a distance of 10.5 pc that was seen to flare once before in the optical (Doyle et al. 1990, A.Ap. Suppl. 86, 403). The x-ray flare occurred on May 28.739 UT, had a rise time of 1 to 3 min, and lasted at least 12 min. After a data gap from 12 to 88 min after the onset, the flare was over. The peak luminosity is 3 × 10 31 erg s −1 cm −2 (2-28 keV), and the fluence at least 2 × 10 34 ergs. The spectral shape is consistent with thermal bremsstrahlung at 11 ± 4 keV. This is the only flare detected from Gl 431 above 1 × 10 31 erg s −1 cm −2 in 1 month of net exposure time over the past five years."
Advances in Science and Research, 2014
ABSTRACT We compare the sea surface wind fields forecasted by a Global Circulation Model (GCM) an... more ABSTRACT We compare the sea surface wind fields forecasted by a Global Circulation Model (GCM) and three Limited Area Models (LAMs) in an operational-like set-up, with the wind remotely sensed by the NASA QuikSCAT scatterometer. The comparison is performed for a single case of Bora wind in the Adriatic Sea, with the purpose to understand the ability of the model forecasts in reproducing the mesoscale features captured by the scatterometer, and to investigate on the suitability of LAM and GCM forecasts as possible forcing in storm surge models (SSMs). The performance is evaluated by means of statistical parameters regarding wind speed and direction showing that, at least in terms of classical statistical parameters, the GCM offer the most advantageous choice in terms of cost/benefit.
In the framework of the Italian flagship project RITMARE (http://www.ritmare.it/en/) an Operation... more In the framework of the Italian flagship project RITMARE (http://www.ritmare.it/en/) an Operational Oceanography Systems (OOS hereafter) based on high resolution 3D hydrodynamic model has been developed for the Oristano Gulf (Sardinia, Italy), with the aim of making short term predictions of water currents and pollutant transport. Atmospheric data provided by the SKIRON meteorological model system (http://forecast.uoa.gr/) were used to make the predictions. In order to asses the quality of the wind field adopted to force the hydrodynamic model, a coastal wind measuring system (WMS hereafter) was developed. The WMS is composed by five three-components anemometers located along the Gulf coasts, which provide hourly and operationally wind measurements. These data are then used operationally to derive high resolution wind fields over the entire Gulf and surrounding coastal areas. The modelled wind data have been compared with the measured ones and the meteorological model accuracy estim...
We exploited a multi-wavelength approach devoted to the study of the evolution of a far-IR select... more We exploited a multi-wavelength approach devoted to the study of the evolution of a far-IR selected, complete sample of galaxies on which numerous studies of galaxy evolution still rely. Thanks to our ISOCAM and optical/near-IR observations, our sample, which provides a direct link between the IRAS and ISO surveys, and the forthcoming deeper Spitzer Extragalactic First Look Survey and AKARI
Shelf types of dense-water formation (DWF) processes occur frequently in the Northern Adriatic Se... more Shelf types of dense-water formation (DWF) processes occur frequently in the Northern Adriatic Sea (NA), due to specific synoptic conditions and wind patterns, mostly related to the blowing of cold and severe Bora winds, advecting cold and dry air from north-eastern Europe, down the Dinaric Alps. The use of low-resolution modelled winds is not able to properly reproduce the fine scale features typical of this basin, particularly in the case of the cross-basin Bora patterns, being the complex Adriatic orography ioften poorly reproduced in atmospheric models.Therefore, in order to understand and model the processes of DWF in the NA, it is mandatory to use high-resolution meteorological and circulation models. Within the framework of activities of the Italian flagship Project "RITMARE" and of the FIRB "DECAL- OGO", several numerical meteorological models at high resolution are made available to describe events of exceptionally dense water formation, such as that reg...
When microclimate analysis in Palazzo Grimani started, paintings in the Apollo Room were in good ... more When microclimate analysis in Palazzo Grimani started, paintings in the Apollo Room were in good condition, except for some parts of the vault near the outside wall, where stuccoes and paintings were heavily damaged due to water presence. Decay causes could be related to three different factors: condensation, moisture passing through the wall, rainwater infiltration from the corresponding room on the upper floor. An environmental monitoring was made surveying air temperature (T), relative humidity (RH), walls, ceiling and floor surfaces temperature using IR and contact sensors, heat and water vapor transfers between walls and air calculating mixing ratio (MR) gradients and finally, using sonic anemometry, the air flow strength and direction near the walls and in the center of the room to individuate and make clear which of the three hypotheses was the real cause of decorations decay. The performed analyses excluded capillary rise although it still remains a problem on the lower floo...
Ground-based and Airborne Telescopes IV, 2012
ABSTRACT Since 2011 a new differential image motion monitor (DIMM) works at Roque de los Muchacho... more ABSTRACT Since 2011 a new differential image motion monitor (DIMM) works at Roque de los Muchachos Observatory close to Telescopio Nazionale Galileo (TNG). The purpose of this instrument is to provide useful information about the optical turbulence for the astronomical observations at TNG. We present the instrument and the first statistical results including a relationship between the principal components analysis of local-ground atmospheric parameters and seeing.
SUPERNOVA 2004K IN ESO 579-G22 Further to IAUC 8272, J. Graham and W. Li report the LOSS discover... more SUPERNOVA 2004K IN ESO 579-G22 Further to IAUC 8272, J. Graham and W. Li report the LOSS discovery, on KAIT images taken on Jan. 19.6 (mag ∼ 17.2) and 21.5 UT (mag ∼ 17.1), of an apparent supernova located at α = 14 h 23 m 39 s .85, δ = −19 o 26 ′ 50 ′′ .0 (equinox 2000.0), which is 15 ′′ .5 west and 11 ′′ .8 south of the nucleus of ESO 579-G22. A KAIT image taken on 2003 July 1.2 showed nothing at this position (limiting mag ∼ 19.0). on behalf of the ERTN (IAUC 7987), report, from inspection of spectra obtained on Jan. 21.15 UT with the Calar Alto 2.2-m reflector (+ CAFOS; range 380-880 nm; resolution 1.1 nm), and Jan. 21.18 with the Asiago 1.8-m telescope (+ AFOSC; range = 355-780 nm, resolution 2.4 nm), that SN 2004G (IAUC 8272) is a type-II supernova, ∼ 5 months after explosion. The expansion velocities deduced from the Hα and Hβ absorptions are ∼ 6600 and 4300 km/s, respectively. SUPERNOVA 2004H IN IC 708 C. L. Gerardy and G. H. Marion, University of Texas at Austin, report that a low-resolution optical spectrogram (resolution 600; range 430-700 nm) of SN 2004H (cf. IAUC 8272), obtained on Jan. 22.35 UT with the 2.7-m Harlan J. Smith Telescope (+ LCS spectrograph) at
NWP WIND TUNING METHODOLOGY: Scatterometers have low temporal coverage (1,5 datum/day maximum in ... more NWP WIND TUNING METHODOLOGY: Scatterometers have low temporal coverage (1,5 datum/day maximum in the Adriatic Sea) and irregular revisitation time, preventing the direct use of scatterometer wind as forcing into storm surge models. Nevertheless, it is possible to extract information on the NWP model wind biases. We used these information to tune the NWP wind fields forcing the SHYFEM storm surge model (https://sites.google.com/site/shyfem/home). The process is described below. 1) The mean scatt-model wind speed relative bias Δws and direction Δθ bias, i.e.
The presence of fog is a frequent problem in the Po Valley. The consequent reduction in visibilit... more The presence of fog is a frequent problem in the Po Valley. The consequent reduction in visibility has a strong impact on the road, air, ship and railway traffic. Both, fog monitoring and forecasting, constitute significant challenges, not least due to the high spatial and temporal variability of the phenomenon. ARPAV (Regional Agency for Environmental Prevention and Protection of Veneto)
A new optical sensor for the continuous monitoring of the dew formation inside organ pipes was de... more A new optical sensor for the continuous monitoring of the dew formation inside organ pipes was designed. This aspect is particularly critical for the conservation of organs in unheated churches since the dew formation or the condensation on the pipe surfaces can contribute to many kinds of physical and chemical disruptive mechanisms. The working principle is based on the change in the reflectivity which is observed on the surface of the fibre tip, when a water layer is formed on its distal end. Intensity changes of the order of 35% were measured, following the formation of the water layer on the distal end of a 400/430 μm optical fibre. Long-term tests carried out placing the fibre tip inside the base of an in-house-made metallic foot of an organ pipe located in an external environment revealed the consistency of the proposed system.