34 results on '"G. Dall'Oglio"'
Search Results
2. COCHISE: the first light of the Italian millimetre telescope at Concordia (Dome C, Antarctica)
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Guido Torrioli, Licia Pizzo, L. Sabbatini, Dario Mancini, G. Dall'Oglio, Francesco Cavaliere, A. Miriametro, Sabbatini, L., Cavaliere, F., Dall'Oglio, Giorgio, Miriametro, A., Pizzo, Gabriella, Mancini, D., and Torrioli, G.
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Physics ,Infrared astronomy ,Reflecting telescope ,Dome ,Astronomy ,Astronomy and Astrophysics ,Field of view ,First light ,law.invention ,Telescope ,Space and Planetary Science ,law ,Millimeter ,Antarctic plateau - Abstract
COCHISE (Cosmological Observations at Concordia with High-sensitivity Instrument for Source Extraction) is a 2.6 m telescope located on the high Antarctic Plateau near the Italian-French Concordia Base. The telescope is mainly devoted to Cosmological observations, able to operate between 200 mu m and 3 mm of wavelength. In this paper we describe the main characteristics of the instrument. We also report on the first light, obtained during summer 2010-2011: this result marks the beginning of millimetre astrophysical observations at Concordia. Responsivity, noise equivalent temperature and field of view of the instrument are reported. At present COCHISE is the largest telescope located at Concordia. Beside the scientific expectations, the use of this kind of instrument in the Antarctic environment poses technological aspects of relevant interest: thus COCHISE can be considered as a pathfinder for future Antarctic telescopes.
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- 2011
- Full Text
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3. Ammalasunta commo commo papero zulú califai
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G. Dall'Oglio and Dall'Oglio, Giorgio
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Physics ,Space and Planetary Science ,Cosmic microwave background ,Astronomy ,Astronomy and Astrophysics ,Cosmology - Abstract
My story with Francesco
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- 2007
4. Millimetric results and perspective
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G. Dall'Oglio and Dall'Oglio, Giorgio
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Physics ,Space and Planetary Science ,Perspective (graphical) ,General Engineering ,Astronomy and Astrophysics ,Physical geography ,Group activity - Abstract
The OASI group have been active in Antarctica since 1986: from the pioneering period, though the 2.62 m mm telescope activity at Terra Nova Bay to the first observing campaigns at Dome C. The group activity significantely contributed to the development of mm Italian Antarctic astronomy, acting as a pathfinder for present success and future development. The overall italian activity is characterised by interesting scientific results, obtained even when adequate funding was not available. The historical evolution of the italian mm activities in Antarctica will be illustrated and the perspective for future experiments will be reported.
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- 2005
5. Millimetric observations of southern HII regions
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R. Paladini, L. Pizzo, Luca Valenziano, L. Martinis, Francesco Cavaliere, R. D. Davies, P. A. Russo, A. Miriametro, G. Dall'Oglio, L. Sabbatini, Sabbatini, L., Cavaliere, F., Dall'Oglio G, ., Davies, R. D., Martinis, L., Miriametro, A., Paladini, R., Pizzo, Gabriella, Russo, A., Valenziano, L., L., Sabbatini, F., Cavaliere, Dall'Oglio, Giorgio, R. D., Davie, L., Martini, A., Miriametro, R., Paladini, L., Pizzo, A., Russo, and AND L., Valenziano
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Physics ,Spectral index ,Astrophysics::High Energy Astrophysical Phenomena ,Bolometer ,Flux ,Astronomy ,Astronomy and Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,law.invention ,Wavelength ,Space and Planetary Science ,Black body ,law ,Astrophysics::Solar and Stellar Astrophysics ,Black-body radiation ,Astrophysics::Earth and Planetary Astrophysics ,Basso continuo ,Astrophysics::Galaxy Astrophysics - Abstract
We report on millimetric continuum observations of two bright compact H II regions, which have been observed for the first time in this frequency range. For the two observed regions (G291.6-0.5 and G291.3-0.7), we derive the flux densities at the two observed wavelengths (1.25 and 2 mm) as well as the spectral index and the temperature of the surrounding dust by fitting a modified blackbody curve to our results combined with IR values obtained from the literature. We also estimate the dust mass and the bolometric luminosity of the two regions.
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- 2005
6. COMPASS: An Instrument for Measuring the Polarization of the CMB on Intermediate Angular Scales
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P. C. Farese, Brian Keating, Lloyd Knox, Peter Timbie, J. E. Ruhl, G. Dall'Oglio, Alan R. Levy, Christopher W. O'Dell, Alan Peel, Lucio Piccirillo, S. Klawikowski, and J. O. Gundersen
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Physics ,Cosmic microwave background ,Astrophysics (astro-ph) ,Astrophysics::Instrumentation and Methods for Astrophysics ,FOS: Physical sciences ,020206 networking & telecommunications ,Astronomy and Astrophysics ,Polarimeter ,02 engineering and technology ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Polarization (waves) ,01 natural sciences ,law.invention ,Telescope ,Space and Planetary Science ,law ,Compass ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,Data analysis ,010303 astronomy & astrophysics ,Remote sensing - Abstract
COMPASS is an on-axis 2.6 meter telescope coupled to a correlation polarimeter. The entire instrument was built specifically for CMB polarization studies. Careful attention was given to receiver and optics design, stability of the pointing platform, avoidance of systematic offsets, and development of data analysis techniques. Here we describe the experiment, its strengths and weaknesses, and the various things we have learned that may benefit future efforts to measure the polarization of the CMB., To be published in the proceedings of "The Cosmic Microwave Background and its Polarization", New Astronomy Reviews, (eds. S. Hanany and K.A. Olive)
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- 2003
7. COMPASS: a 2.6m telescope for CMBR polarization studies
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Alan R. Levy, Lloyd Knox, P. C. Farese, S. Klawikowski, Brian Keating, J. E. Ruhl, Christopher W. O'Dell, Peter T. Timbie, Philip Lubin, J. O. Gundersen, Lucio Piccirillo, G. Dall'Oglio, De Petris, M., and Gervasi, M.
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Physics ,Physics::General Physics ,COSMIC cancer database ,Cosmic microwave background ,Cosmic background radiation ,Astronomy ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Polarization (waves) ,law.invention ,Telescope ,General Relativity and Quantum Cosmology ,law ,Compass ,Observational cosmology ,Microwave - Abstract
COMPASS (COsmic Microwave Polarization at Small Scale) is an experiment devoted to measuring the polarization of the CMBR. Its design and characteristics are presented.
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- 2002
8. Millimetric Astronomy from the High Antarctic Plateau: site testing at Dome C
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L. Valenziano and G. Dall'Oglio
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Physics ,Automatic weather station ,Site testing ,Astrophysics (astro-ph) ,FOS: Physical sciences ,Astronomy and Astrophysics ,Astrophysics ,Geodesy ,Wind speed ,Monitoring temperature ,Precipitable water vapor ,Dome (geology) ,Space and Planetary Science ,Observatory ,Antarctic plateau - Abstract
Preliminary site testing at Dome C (Antarctica) is presented, using both Automatic Weather Station (AWS) meteorological data (1986-1993) and Precipitable Water Vapor (PWV) measurements made by the authors. A comparison with South Pole and other sites is made. The South Pole is a well established astrophysical observing site, where extremely good conditions are reported for a large fraction of time during the year. Dome C, where Italy and France are building a new scientific station, is a potential observing site in the millimetric and sub-millimetric range. AWS are operating at both sites and they have been continuously monitoring temperature, pressure, wind speed and direction for more than ten years. Site testing instruments are already operating at the South Pole (AASTO, Automated Astrophysical Site-Testing Observatory), while ''light'' experiments have been running at Dome C (APACHE, Antarctic Plateau Anisotropy CHasing Experiment) during summertime. A direct comparison between the two sites is planned in the near future, using the AASTO. The present analysis shows that the average wind speed is lower at Dome C (~1 m/s) than at the South Pole (~2 m/s), while temperature and PWV are comparable., 10 pages, 8 figures, se also http://www.atnf.csiro.au/pasa/16_2/
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- 1999
9. Interstellar dust spectral index: a balloon-borne experiment
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Gianluca Morgante, L. Pizzo, G. Dall'Oglio, Paola Merluzzi, Luca Valenziano, Dall'Oglio, G., Morgante, G., Pizzo, Gabriella, Valenziano, L., and Merluzzi, P.
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Physics ,Spectral index ,Binocular telescope ,Parabolic reflector ,Astrophysics::High Energy Astrophysical Phenomena ,Astrophysics::Instrumentation and Methods for Astrophysics ,Astronomy ,Astronomy and Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,Photometer ,law.invention ,Wavelength ,Space and Planetary Science ,law ,Astrophysics::Earth and Planetary Astrophysics ,Astrophysics::Galaxy Astrophysics ,Cosmic dust - Abstract
A balloon-borne experiment has been conceived in order to map the sub-millimetric galactic emission at four different wavelengths between 400 μm and 2 mm at an angular scale of 1°. Such measurements will make it possible both to investigate the nature of the interstellar dust and to disentangle the galactic contribution from extragalactic and cosmological signals. A binocular telescope system has been realized by means of two 37 cm of-axis wobbling parabolic mirrors, each one coupled with a two-channel 3He photometer. The first trans-Mediterranean flight is scheduled for summer 1995.
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- 1995
10. 'A double-channel photometer for the Swedish ESO sub-millimeter telescope'
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G. Dall'Oglio, N. Whyborn, L. Pizzo, Angel Otarola, Paola Andreani, R. Lemke, Pizzo, Gabriella, Andreani, P, Dall'Oglio, G, Lemke, R, Otarola, A, and Whyborn, N.
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Physics ,business.industry ,Astronomy ,Astronomy and Astrophysics ,Field of view ,Photometer ,law.invention ,Telescope ,Optics ,Space and Planetary Science ,law ,ROSAT ,Channel (broadcasting) ,Antenna (radio) ,business ,Noise (radio) - Abstract
A double channel (1.2 and 2 mm) photometer has been installed at the focus of the 15m SEST antenna in Chile to perform measurements of the Sunyaev-Zeldovich effect towards X-ray ROSAT clusters. This paper describes the instrument and the characteristics of the system: its sensitivity, field of view, noise and the performed calibrations.
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- 1995
11. 'Improved 3He/4He refrigerator'
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W. Fischer, G. Dall'Oglio, L. Pizzo, L. Martinis, Dall'Oglio, G, Fischer, W, Martinis, L, and Pizzo, Gabriella
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Convection ,Operative temperature ,Materials science ,Bolometer ,Condensation ,Refrigerator car ,General Physics and Astronomy ,chemistry.chemical_element ,Thermodynamics ,Cryogenics ,Mechanics ,law.invention ,chemistry ,law ,Thermal ,General Materials Science ,Helium - Abstract
The characteristics and performance of an improved 3 He/ 4 He double stage refrigerator are presented. It is based on the same principle as the previous double stage refrigerator described in reference 1. A new geometry was used to overcome both the extra thermal input due to gas convection in the condensation lines and the long period required to precool at 4.2 K. The improved refrigerator reaches an operative temperature of ≈0.35 K without any external mechanical pumping. The refrigerator has been used to cool 3 He bolometers.
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- 1993
12. Interstellar-dust properties as deduced from FIR and millimetric observations
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L. Pizzo, Luigi Colangeli, E. Bussoletti, V. Mennella, Alessandra Rotundi, G. Dall'Oglio, Paola Merluzzi, and P. Andreani
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Astrophysics::High Energy Astrophysical Phenomena ,Milky Way ,Ocean Engineering ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,symbols.namesake ,IR sources ,Mechanical Engineering ,Electrical and Electronic Engineering ,Control and Systems Engineering ,Engineering (miscellaneous) ,Nuclear Energy and Engineering ,Computer Science Applications1707 Computer Vision and Pattern Recognition ,Chemical Engineering (all) ,Planck ,Large Magellanic Cloud ,Astrophysics::Galaxy Astrophysics ,Cosmic dust ,Physics ,Spectral index ,COSMIC cancer database ,Astronomy ,Galaxy ,Interstellar medium ,symbols - Abstract
We have considered some millimetric observations of our Galaxy and of the Large Magellanic Cloud (LMC) taken at the Italian Base in Antarctica. Using other submm data and fitting all the observations with a modified Planck curve, we have obtained useful information about the temperaureT and the spectral index α of the dust grains both for the Galaxy and the LMC. For the galactic spectrum two different couples ofT and α match the detected fluxes:a)T=7K, α=2;b)T=15K, α=1.1. We have tried to identify the nature of the dust grains responsible for the submm and mm emission by comparing these results with the spectral trend of some cosmic analogues studied in laboratory.
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- 1993
13. 'Diffuse galactic emission at millimetric wavelengths'
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P. Andreani, L. Pizzo, L. Rossi, G. Dall'Oglio, Lucio Piccirillo, C. Venturino, L. Martinis, Andreani, P, Dall'Oglio, G, Martinis, L, Piccirillo, L, Pizzo, Gabriella, Rossi, L, Venturino, C., Andreani, P., Dall'Oglio, Giorgio, Martinis, L., Piccirillo, L., and Rossi, L.
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Physics ,Infrared ,Astrophysics::High Energy Astrophysical Phenomena ,Milky Way ,Astronomy ,Astronomy and Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,Galaxy ,Interstellar medium ,Space and Planetary Science ,Bulge ,Chamaeleon ,Astrophysics::Earth and Planetary Astrophysics ,Disc ,Physics::Atmospheric and Oceanic Physics ,Astrophysics::Galaxy Astrophysics ,Cosmic dust - Abstract
Millimetric continuum observations of the Galactic disk at b about -8 deg and l about 290-310 deg has been achieved during the Italian 1987-1988 scientific expedition in Antarctica. Emission was detected from few southern clouds (the Chamaeleon region and a cirrus cloud), and their energy distributions reveal an excess in the long wavelength range. This fact is interpreted as being due to the presence of a cold component of the interstellar material coexisting with the warm dust responsible for the emission detected by IRAS. Then, a multiple nature of the interstellar dust is suggested also in regions far from the Galactic bulge. 45 refs.
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- 1991
14. Atmospheric transmission and noise measurements in Antarctica
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W. Pecorella, Bianca Melchiorri, L. Pizzo, G. Dall'Oglio, P. de Bernardis, Silvia Masi, Arturo Moleti, Dall'Oglio, G., De Bernardis, P., Masi, S., Melchiorri, B., Moleti, A., Pecorella, W., and Pizzo, Gabriella
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Atmosphere ,Infrared astronomy ,Precipitable water ,General Engineering ,Airglow ,Environmental science ,Far-infrared astronomy ,Settore FIS/06 - Fisica per il Sistema Terra e Il Mezzo Circumterrestre ,Atmospheric sciences ,Water vapor ,Noise (radio) - Abstract
We describe a set of measurements carried out in Antarctica during the second Italian Antarctic Expedition. Atmospheric precipitable water vapour, millimetric transmission and noise were monitored for 2 months during the austral summer. The results suggest that the site is favourable for far infrared astronomy measurements.
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- 1988
15. THE COSMIC BACKGROUND RADIATION
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G. Dall'Oglio, G Moreno, Francesco Melchiorri, and B Melchiorri
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Physics ,Astrophysics and Astronomy ,Information retrieval ,Cosmic microwave background ,Cosmic background radiation ,General Physics and Astronomy ,Astronomy ,Cosmic ray ,Perturbation theory ,Spectrum analysis ,Space radiation ,Background radiation ,Cosmochemistry - Published
- 1986
16. Ground-based atmospheric radiometry in the far-infrared
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P. de Bernardis, Silvia Masi, Bianca Melchiorri, G. Dall'Oglio, and Arturo Moleti
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Accuracy and precision ,Atmosphere of Earth ,Far infrared ,Infrared window ,General Engineering ,Radiative transfer ,Environmental science ,Radiometry ,Settore FIS/06 - Fisica per il Sistema Terra e Il Mezzo Circumterrestre ,Power law ,Water vapor ,Remote sensing - Abstract
We describe an instrument capable of accurate measurement of atmospheric transparency in the FIR (4 ≲ \ gn ≲ 20 cm−1. We also discuss the possibility of obtaining quantitative information about the atmospheric water vapour profile by means of very accurate measurement of the atmospheric transparency spectrum. We also report as a preliminary result a spectrum of the atmospheric transparency and discuss the problem of the excess absorption in the atmospheric windows, comparing our data with models using different power law behaviours for the continuum term. We find that our data agree with a ν2 behaviour at the 50% confidence level.
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- 1986
17. A five-band differential IR photometer for balloon-borne observations of diffuse sky radiation
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C. Ceccarelli, A. Salama, Silvia Masi, K. Shivanandan, Brunella Nisini, P. de Bernardis, G. Moreno, G. Dall'Oglio, P. Andreani, Arturo Moleti, Francesco Melchiorri, Lucio Piccirillo, Bianca Melchiorri, and L. Pietranera
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Physics ,Interplanetary dust cloud ,Settore FIS/05 - Astronomia e Astrofisica ,law ,General Engineering ,Diffuse sky radiation ,Calibration ,Astronomy ,Photometer ,Balloon ,Stratosphere ,law.invention ,Stratospheric balloon - Abstract
We have developed a large beam, five-band IR differential photometer, covering the range from 10 to $ 200 μm, devoted to the study of diffuse emission of galactic and extragalactic origins. Here we describe in detail the main features of the experimental apparatus and its calibration. The experiment was flown on a stratospheric balloon on 30 July 1984, collecting data for about 15 hours.
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- 1986
18. Measurements of near- and far-infrared zodiacal dust emission
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A. Salama, P. Andreani, G. dall'Oglio, P. Debernardis, S. Masi, B. Melchiorri, F. Melchiorri, G. Moreno, B. Nisini, and K. Shivanandan
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Physics ,Zodiacal light ,Infrared ,media_common.quotation_subject ,Astronomy ,Astronomy and Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,Electromagnetic radiation ,Wavelength ,Far infrared ,Space and Planetary Science ,Sky ,Astrophysics::Solar and Stellar Astrophysics ,Astrophysics::Earth and Planetary Astrophysics ,Emission spectrum ,Astrophysics::Galaxy Astrophysics ,Cosmic dust ,media_common - Abstract
Results concerning zodiacal dust emission are reported from an IR sky survey experiment performed during a balloon flight on July 30, 1984 which explored five wavelength bands centered at 11, 19, 50, 108, and 225 microns. The dust density n decreases at a rate slower than r exp -1.3 with increasing heliocentric distance. The trend of n depends critically on the radial variation of the temperature which, in turn, depends on the chemical composition of the grains. The spatial distribution of the dust is in good agreement with that previously inferred from IR measurements. A comparison between IR and optical observations points out the uncertainties affecting the estimates of the dust density obtained with both methods. The emission spectrum of the dust is used to discriminate among the different species of grains, showing that the observations can be accounted for by an appropriate mixture of graphite and silicates. 18 references.
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- 1987
19. FIR observations of stratospheric irregularities and fluctuations
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C. Ceccarelli, Francesco Melchiorri, P. de Bernardis, Silvia Masi, L. Pietranera, B. Olivo, G. Moreno, and G. Dall'Oglio
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Physics ,Atmospheric sounding ,business.industry ,General Engineering ,Atmospheric temperature ,Computational physics ,Wavelength ,Optics ,Amplitude ,Altitude ,Emissivity ,business ,Anisotropy ,Stratosphere - Abstract
During a balloon flight at 45km altitude, we found a quadrupole-like anisotropy in the stratospheric emission in the FIR, aligned in the North-South direction with a typical amplitude of 3×10 −2 K. A sudden increase in the amplitude of the anisotropy was found with a time scale of 1 hr and the amplitude was found to be wavelength dependent (0.25 K at 100 μm and 0.15 K at 600 μm wavelength). This is consistent with an anisotropy in the water-vapour distribution of the order of 5%.
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- 1983
20. Polarization properties of Fluorogold in the far infrared
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F. D'Alessandro, S. Fonti, P. de Bernardis, Francesco Melchiorri, A. Blanco, G. Dall'Oglio, and Silvia Masi
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Materials science ,Infrared ,Scattering ,business.industry ,General Engineering ,Michelson interferometer ,Radiation ,Polarization (waves) ,Intrinsic polarization ,law.invention ,Background spectrum ,Optics ,Far infrared ,law ,business - Abstract
Fluorogold, a glass-filled teflon, is widely used as a long-wave pass filter in the infrared. We have found an important intrinsic polarization arising from the scattering of the radiation by the aligned grains of the reinforcing aggregate bound by teflon. The effect must be taken into account in the case of Fluorogold filters employed with a polarizing Michelson interferometer for measurements of absolute fluxes, as in the course of observations of the cosmic background spectrum carried out by several authors.
- Published
- 1982
21. Impact of the COVID-19 pandemic on malaria in pregnancy indicators in Northern Uganda: a joinpoint regression analysis.
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Segala FV, Ictho J, L'Episcopia M, Onapa E, De Vita E, Novara R, Olung N, Totaro V, Olal L, Patti G, Bingom C, Farina U, Papagni R, Agaro C, Bavaro DF, Amone J, Dall'Oglio G, Ngole B, Marotta C, Okori S, Zarcone M, Ogwang J, Severini C, Lochoro P, Putoto G, Saracino A, and Di Gennaro F
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- Humans, Pregnancy, Female, Uganda epidemiology, Prenatal Care statistics & numerical data, Interrupted Time Series Analysis, Pregnancy Complications, Parasitic epidemiology, Pregnancy Complications, Parasitic prevention & control, Adult, Regression Analysis, Antimalarials therapeutic use, Malaria, Falciparum epidemiology, Malaria, Falciparum prevention & control, Pandemics, COVID-19 epidemiology, COVID-19 prevention & control, Malaria epidemiology, Malaria prevention & control, SARS-CoV-2
- Abstract
Background: Pregnancy is both a risk factor for P. falciparum infection and development of severe malaria. In low- and middle-income countries, the COVID-19 pandemic severely impacted health systems, including utilization of maternal services. This study aimed to assess trends in delivering malaria in pregnancy-related health-care services before and during COVID-19 in Northern Uganda., Methods: An interrupted time-series study comparing pre-COVID-19 (January 2018 to April 2020) and COVID-19 (May to December 2021) periods, based on the date the first COVID case was detected. The study involved 30 health facilities in Northern Uganda with 22,650 estimated pregnancies per year, 14% of which took place in hospital. Monthly data were sourced from District routinely collected indicators. Trends were analyzed by joinpoint regression models., Results: From the onset of the COVID pandemic in Uganda (May 2020), we found a significant reduction in the number of women accessing a fourth antenatal care visit (from APC + 183.5 to + 4.98; p < 0.001) and taking at least three doses of intermittent preventive treatment in pregnancy (IPTp, from APC + 84.28 to -63.12; p < 0.001). However, we found no significant change in the trend of the total number of pregnant women managed as outpatients or hospitalized for malaria, as well as in the number of women attending their first antenatal visit and in the number of institutional deliveries., Conclusions: In our study, the COVID-19 pandemic significantly reduced access to ANC visits and IPTp uptake. However, the healthcare system maintained its capacity for managing malaria cases, first antenatal visits, and institutional deliveries.Trial registration: This study has been registered on the ClinicalTrials.gov public website on 26 April 2022. ClinicalTrials.gov Identifier: NCT05348746.
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- 2024
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22. COVID Perceptions among Pregnant Women Living in a Malaria Hyperendemic Rural Region in Uganda: A Cross-Sectional Study.
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Segala FV, Patti G, Olal L, De Vita E, Olung N, Papagni R, Amone J, Totaro V, Onapa E, Novara R, Ngole B, L'Episcopia M, Okori S, Dall'Oglio G, Ictho J, Severini C, Putoto G, Lochoro P, Di Gennaro F, and Saracino A
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- Female, Pregnancy, Humans, Young Adult, Adult, Pregnant Women, Cross-Sectional Studies, Prospective Studies, RNA, Viral, Uganda epidemiology, SARS-CoV-2, COVID-19 epidemiology, COVID-19 complications, Malaria epidemiology, Malaria complications, Malaria, Falciparum epidemiology
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Both SARS-CoV2 and Plasmodium falciparum infection during pregnancy increases the risk for adverse maternal and fetal outcomes, including abortion, severe disease, and death. Indeed, although malaria and COVID-19 show an overlapping clinical presentation, they require a profoundly different approach. The aim of this study was to explore COVID-19 awareness among pregnant women living in a P. falciparum hyperendemic region in rural Uganda. This cross-sectional, prospective study was conducted in one Hospital and two Health Centers (HC) in Lango region, Uganda, from July 14, 2022, to March 14, 2023. Data about demographics, COVID-19 history, and COVID-19 and malaria perceptions were collected using RedCap mobile app platform. Study endpoint was a context-specific COVID-19 awareness score, accounting for the most common disease misconceptions. Association between study variables and good COVID-19 awareness was assessed by χ2 and t test, as appropriate, and variables found to be statistically significant were further explored in multivariate logistic regression analysis. A total of 888 pregnant women were recruited. Median age was 24 (interquartile range: 20-29) years, whereas 79% (n = 704) attained only primary education and 66.6% (n = 591) were used in agriculture. SARS-CoV2 vaccination rate was 92%. In multivariate analysis (Table 3), variables associated with high COVID knowledge were presenting at antenatal care visit in Atipe HC (adjusted odds ratio [aOR]: 8.1, 95% CI: 4.1-16.48) having a previous good knowledge about malaria (aOR: 1.76, 95% CI: 1.21-2.56). Among pregnant women living in rural Uganda, COVID-19 awareness relies on the overall educational level, malaria knowledge and reference HC. Among pregnant women living in P. falciparum endemic areas, community-level malaria awareness might guide educational interventions during future pandemics.
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- 2023
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23. Impact of antimalarial resistance and COVID-19 pandemic on malaria care among pregnant women in Northern Uganda (ERASE): protocol of a prospective observational study.
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Segala FV, Di Gennaro F, Ictho J, L'Episcopia M, Onapa E, Marotta C, De Vita E, Amone J, Iacobelli V, Ogwang J, Dall'Oglio G, Ngole B, Murri R, Olal L, Fantoni M, Okori S, Putoto G, Severini C, Lochoro P, and Saracino A
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- Drug Combinations, Drug Resistance, Female, Humans, Observational Studies as Topic, Pandemics, Pregnancy, Pregnant Women, Prospective Studies, Pyrimethamine therapeutic use, Retrospective Studies, Sulfadoxine therapeutic use, Uganda epidemiology, Antimalarials therapeutic use, Artemisinins therapeutic use, COVID-19, Malaria, Falciparum drug therapy, Malaria, Falciparum epidemiology, Malaria, Falciparum prevention & control
- Abstract
Background: Uganda accounts for 5% of all malaria cases and deaths reported globally and, in endemic countries, pregnancy is a risk factor for both acquisition of P. falciparum infection and development of severe malaria. In recent years, malaria control has been threatened by COVID-19 pandemic and by the emergence, in Northern Uganda, of both resistance to artemisinin derivatives and to sulfadoxine-pyrimethamine., Methods: In this facility-based, prospective, observational study, pregnant women will be recruited at antenatal-care visits and followed-up until delivery. Collected data will explore the incidence of asymptomatic parasitemia and malaria-related outcomes, as well as the attitudes towards malaria prevention, administration of intermittent preventive treatment, healthcare seeking behavior and use of insecticide-treated nets. A subpopulation of women diagnosed with malaria will be recruited and their blood samples will be analyzed for detection of genetic markers of resistance to artemisinin derivatives and sulfadoxine-pyrimethamine. Also, to investigate the impact of COVID-19 on malaria care among pregnant women, a retrospective, interrupted-time series will be conducted on at the study sites for the period January 2018 to December 2021., Discussion: The present study will explore the impact of COVID-19 pandemic on incidence of malaria and malaria-related adverse outcomes, along with the prevalence of resistance to artemisinin derivatives and to sulfadoxine-pyrimethamine. To our knowledge, this is the first study aiming to explore the combined effect of these factors on a cohort of pregnant women., Trial Registration: This study has been registered on the ClinicalTrials.gov public website on 26th April, 2022., Clinicaltrials: gov Identifier: NCT05348746., (© 2022. The Author(s).)
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- 2022
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24. An integrated hospital-district performance evaluation for communicable diseases in low-and middle-income countries: Evidence from a pilot in three sub-Saharan countries.
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Tavoschi L, Belardi P, Mazzilli S, Manenti F, Pellizzer G, Abebe D, Azzimonti G, Nsubuga JB, Dall'Oglio G, and Vainieri M
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- Developing Countries, Hospitals, Humans, Tanzania, Communicable Diseases diagnosis, Communicable Diseases epidemiology, Gastroenteritis, HIV Infections diagnosis, HIV Infections epidemiology, HIV Infections prevention & control, Tuberculosis diagnosis, Tuberculosis epidemiology, Tuberculosis prevention & control
- Abstract
Introduction: The last two decades saw an extensive effort to design, develop and implement integrated and multidimensional healthcare evaluation systems in high-income countries. However, in low- and middle-income countries, few experiences of such systems implementation have been reported in the scientific literature. We developed and piloted an innovative evaluation tool to assess the performance of health services provision for communicable diseases in three sub-Saharan African countries., Material and Methods: A total of 42 indicators, 14 per each communicable disease care pathway, were developed. A sub-set of 23 indicators was included in the evaluation process. The communicable diseases care pathways were developed for Tuberculosis, Gastroenteritis, and HIV/AIDS, including indicators grouped in four care phases: prevention (or screening), diagnosis, treatment, and outcome. All indicators were calculated for the period 2017-2019, while performance evaluation was performed for the year 2019. The analysis involved four health districts and their relative hospitals in Ethiopia, Tanzania, and Uganda., Results: Substantial variability was observed over time and across the four different districts. In the Tuberculosis pathway, the majority of indicators scored below the standards and below-average performance was mainly reported for prevention and diagnosis phases. Along the Gastroenteritis pathway, excellent performance was instead evaluated for most indicators and the highest scores were reported in prevention and treatment phases. The HIV/AIDS pathway indicators related to screening and outcome phases were below the average score, while good or excellent performance was registered within the treatment phase., Conclusions: The bottom-up approach and stakeholders' engagement increased local ownership of the process and the likelihood that findings will inform health services performance and quality of care. Despite the intrinsic limitations of data sources, this framework may contribute to promoting good governance, performance evaluation, outcomes measurement and accountability in settings characterised by multiple healthcare service providers., Competing Interests: The authors have declared that no competing interests exist.
- Published
- 2022
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25. Changing the role of traditional birth attendants in Yirol West County, South Sudan.
- Author
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Wilunda C, Dall'Oglio G, Scanagatta C, Segafredo G, Lukhele BW, Takahashi R, Putoto G, Manenti F, and Betrán AP
- Subjects
- Adolescent, Adult, Female, Focus Groups, Humans, Pregnancy, Sudan, Young Adult, Delivery, Obstetric, Home Childbirth, Midwifery
- Abstract
Effective from May 2014, community-based traditional birth attendants (TBAs) in Yirol West County, South Sudan, were directed to start referring all women in labour to health facilities for childbirth instead of assisting them in the villages. This study aimed to understand the degree of integration of TBAs in the health system, to reveal the factors influencing the integration, and to explore the perceived solutions to the challenges faced by TBAs. A qualitative study utilising 11 focus group discussions with TBAs, 6 focus group discussions with women, and 18 key informant interviews with members of village health committees, staff of health facilities, and staff of the County Health Department was conducted. Data were analysed using qualitative content analysis. The study found that many TBAs were referring women to health facilities for delivery, but some were still attending to deliveries at home. Facilitators of the adoption of the new role by TBAs were: acceptance of the new TBAs' role by the community, women and TBAs, perceptions about institutional childbirth and risks of home childbirth, personal commitment and motivation by some TBAs, a good working relationship between community-based TBAs and health facility staff, availability of incentives for women at health facilities, and training of TBAs. Challenges of integrating TBAs in the health system included, among others, communication problems between TBAs and health care facilities, delays in seeking care by women, insecurity, lack of materials and supplies for TBAs, health system constraints, insufficient incentives for TBAs, long distances to health facilities and transportation problems. This study has revealed encouraging developments in TBAs' integration in the formal health system in Yirol West. However, there is need to address the challenges faced by TBAs in assuming their new role in order to sustain the integration.
- Published
- 2017
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26. Lung parasites of the genus Metastrongylus Molin, 1861 (Nematoda: Metastrongilidae) in wild boar (Sus scrofa L., 1758) in Central-Italy: An eco-epidemiological study.
- Author
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Poglayen G, Marchesi B, Dall'Oglio G, Barlozzari G, Galuppi R, and Morandi B
- Subjects
- Animals, Epidemiologic Studies, Female, Italy, Lung parasitology, Male, Metastrongyloidea physiology, Parasite Load, Prevalence, Strongylida Infections epidemiology, Strongylida Infections parasitology, Swine, Swine Diseases epidemiology, Swine Diseases parasitology, Strongylida Infections veterinary, Sus scrofa parasitology
- Abstract
The respiratory tracts of 57 wild boars (Sus scrofa L. 1758) hunted in central Italy during the 2011/2012 hunting season were examined to detect the presence of lung worms. Fifty-five out of 57 animals (96,5%) were positive. Five species of Metastrongylus were detected and their prevalence was as follows: Metastrongylus asymmetricus Noda, 1973 (91.2%), Metastrongylus confusus Jansen, 1964 and Metastrongylus salmi Gedoelst, 1923 (87.7%), Metastrongylus apri Gmelin, 1790 (80.7%), Metastrongylus pudendotectus Vostokov, 1905 (70.2%). In most cases multi-species infection was observed. The highest parasite load was found in young animals (<1 year old). The Metastrongylus genus sex ratio (M/F) had a range from 1:4.8 to 1:1.5 in favor of females. The Simpson and Shannon-Wiener indices showed a moderate uniformity in parasite community composition. The Fager index highlighted a high degree of affinity among all pairs of selected parasites. The whole parasite population showed an aggregate distribution. Our findings confirm that these parasites are widespread in the wild boar population. The establishment of outdoor domestic pig farming in the same area of the game preserve could pose the risk of infection to domestic animals. Further studies will be needed to understand the factors involved in the presence and prevalence of the intermediate host as well as the population dynamics of Metastrongylus spp., (Copyright © 2015 Elsevier B.V. All rights reserved.)
- Published
- 2016
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27. Availability, utilisation and quality of maternal and neonatal health care services in Karamoja region, Uganda: a health facility-based survey.
- Author
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Wilunda C, Oyerinde K, Putoto G, Lochoro P, Dall'Oglio G, Manenti F, Segafredo G, Atzori A, Criel B, Panza A, and Quaglio G
- Subjects
- Adult, Cross-Sectional Studies, Equipment and Supplies, Female, Humans, Infant, Newborn, Uganda, Health Facilities statistics & numerical data, Health Services Accessibility, Maternal Health Services statistics & numerical data, Quality Assurance, Health Care
- Abstract
Background: Maternal mortality is persistently high in Uganda. Access to quality emergency obstetrics care (EmOC) is fundamental to reducing maternal and newborn deaths and is a possible way of achieving the target of the fifth millennium development goal. Karamoja region in north-eastern Uganda has consistently demonstrated the nation's lowest scores on key development and health indicators and presents a substantial challenge to Uganda's stability and poverty eradication ambitions. The objectives of this study were: to establish the availability of maternal and neonatal healthcare services at different levels of health units; to assess their utilisation; and to determine the quality of services provided., Methods: A cross sectional study of all health facilities in Napak and Moroto districts was conducted in 2010. Data were collected by reviewing clinical records and registers, interviewing staff and women attending antenatal and postnatal clinics, and by observation. Data were summarized using frequencies and percentages and EmOC indicators were calculated., Results: There were gaps in the availability of essential infrastructure, equipment, supplies, drugs and staff for maternal and neonatal care particularly at health centres (HCs). Utilisation of the available antenatal, intrapartum, and postnatal care services was low. In addition, there were gaps in the quality of care received across these services. Two hospitals, each located in the study districts, qualified as comprehensive EmOC facilities. The number of EmOC facilities per 500,000 population was 3.7. None of the HCs met the criteria for basic EmOC. Assisted vaginal delivery and removal of retained products were the most frequently missing signal functions. Direct obstetric case fatality rate was 3%, the met need for EmOC was 9.9%, and 1.7% of expected deliveries were carried out by caesarean section., Conclusions: To reduce maternal and newborn morbidity and mortality in Karamoja region, there is a need to increase the availability and the accessibility of skilled birth care, address the low utilisation of maternity services and improve the quality of care rendered. There is also a need to improve the availability and accessibility of EmOC services, with particular attention to basic EmOC.
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- 2015
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28. A qualitative study on barriers to utilisation of institutional delivery services in Moroto and Napak districts, Uganda: implications for programming.
- Author
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Wilunda C, Quaglio G, Putoto G, Lochoro P, Dall'Oglio G, Manenti F, Atzori A, Lochiam RM, Takahashi R, Mukundwa A, and Oyerinde K
- Subjects
- Attitude of Health Personnel, Culture, Delivery, Obstetric economics, Female, Food Supply, Health Facilities economics, Health Resources supply & distribution, Health Services Accessibility, Humans, Male, Patient Participation, Poverty, Qualitative Research, Rural Health Services economics, Uganda, Delivery, Obstetric statistics & numerical data, Developing Countries, Health Facilities statistics & numerical data, Rural Health Services statistics & numerical data
- Abstract
Background: Skilled attendance at delivery is critical in prevention of maternal deaths. However, many women in low- and middle-income countries still deliver without skilled assistance. This study was carried out to identify perceived barriers to utilisation of institutional delivery in two districts in Karamoja, Uganda., Methods: Data were collected through participatory rural appraisal (PRA) with 887 participants (459 women and 428 men) in 20 villages in Moroto and Napak districts. Data were analysed using deductive content analysis. Notes taken during PRA session were edited, triangulated and coded according to recurring issues. Additionally, participants used matrix ranking to express their perceived relative significance of the barriers identified., Results: The main barriers to utilisation of maternal health services were perceived to be: insecurity, poverty, socio-cultural factors, long distances to health facilities, lack of food at home and at health facilities, lack of supplies, drugs and basic infrastructure at health facilities, poor quality of care at health facilities, lack of participation in planning for health services and the ready availability of traditional birth attendants (TBAs). Factors related to economic and physical inaccessibility and lack of infrastructure, drugs and supplies at health facilities were highly ranked barriers to utilisation of institutional delivery., Conclusion: A comprehensive approach to increasing the utilisation of maternal health care services in Karamoja is needed. This should tackle both demand and supply side barriers using a multi-sectorial approach since the main barriers are outside the scope of the health sector. TBAs are still active in Karamoja and their role and influence on maternal health in this region cannot be ignored. A model for collaboration between skilled health workers and TBAs in order to increase institutional deliveries is needed.
- Published
- 2014
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29. Toward continuous glucose monitoring with planar modified biosensors and microdialysis. Study of temperature, oxygen dependence and in vivo experiment.
- Author
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Ricci F, Caprio F, Poscia A, Valgimigli F, Messeri D, Lepori E, Dall'Oglio G, Palleschi G, and Moscone D
- Subjects
- Animals, Blood Glucose Self-Monitoring, Dogs, Humans, Temperature, Biosensing Techniques, Blood Glucose analysis, Microdialysis, Oxygen
- Abstract
Glucose biosensors based on the use of planar screen-printed electrodes modified with an electrochemical mediator and with glucose oxidase have been optimised for their application in the continuous glucose monitoring in diabetic patients. A full study of their operative stability and temperature dependence has been accomplished, thus giving useful information for in vivo applications. The effect of dissolved oxygen concentration in the working solution was also studied in order to evaluate its effect on the linearity of the sensors. Glucose monitoring performed with serum samples was performed to evaluate the effect of matrix components on operative stability and demonstrated an efficient behaviour for 72 h of continuous monitoring. Finally, these studies led to a sensor capable of detecting glucose at concentrations as low as 0.04 mM and with a good linearity up to 2.0 mM (at 37 degrees C) with an operative stability of ca. 72 h, thus demonstrating the possible application of these sensors for continuous glucose monitoring in conjunction with a microdialysis probe. Moreover, preliminary in vivo experiments for ca. 20 h have demonstrated the feasibility of this system.
- Published
- 2007
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30. A new rheometer with special features designed for bronchial mucus analysis in clinical practice.
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Braga PC, Allegra L, Dall'Oglio G, Angelini M, and Mocchi A
- Subjects
- Bronchi metabolism, Humans, Lung Diseases physiopathology, Mucus metabolism, Rheology instrumentation, Sputum physiology
- Abstract
Changes in production and in physico-chemical properties of bronchial mucus is a common denominator of many pulmonary diseases. A rheometer with innovative features aimed at bronchial mucus routine investigation in clinical practice at the bedside of the patient has been designed. Searle-type configuration with a coaxial cylinder sensor system and the Mooney-Ewart geometry has been adopted. Another new feature is that bob and cup are disposable. Dynamic viscoelasticity is calculated through a microprocessor with specific software and by means of a magnetic torque--motor electronically driven by the microprocessor. The self-zeroing procedure and the autorange greatly simplify the measuring-cycle which is driven by only one switch. Data (eta and G') are automatically printed on paper. The whole measuring-cycle at the bedside of the patient takes 3-5 min, so that in 1h about 12 samples can be investigated.
- Published
- 1992
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31. Inhibitory effect of eseroline, an opiate like drug, on the rat nociceptive thalamic neurons activated by peripheral noxious stimuli.
- Author
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Braga PC, Tiengo M, Biella G, Dall'Oglio G, and Fraschini F
- Subjects
- Animals, Electric Conductivity drug effects, Hot Temperature, Male, Naloxone pharmacology, Neurons drug effects, Nociceptors drug effects, Pain physiopathology, Physical Stimulation, Rats, Rats, Inbred Strains, Analgesics, Opioid pharmacology, Indoles pharmacology, Neurons physiology, Nociceptors physiology, Thalamus physiology
- Abstract
Eseroline is a new agent, derived from physostigmine but lacking in pseudocholinesterase activity, that possesses opioid properties in vivo and in vitro in cats and rodents. The electrophysiological effect of this drug has been investigated. Our findings show that Eseroline (5 mg/kg i.p.), suppresses the nociceptive responses evoked by noxious (mechanical and thermal) stimuli, without affecting the spontaneous firing of neurons in the thalamus of anesthetized rat. This effect starts about 5 min after the administration and lasts on average for about 60 min. Naloxone (1 mg/kg i.p.), injected 10 min before Eseroline, antagonized the antinociceptive action of this drug.
- Published
- 1984
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32. Microelectrode tip in five seconds. A new simple, rapid, inexpensive method.
- Author
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Braga PC, Dall'oglio G, and Fraschini F
- Subjects
- Animals, Methods, Rabbits, Rats, Tungsten, Microelectrodes
- Abstract
A method using a oxyacetylene torch flame is described; it makes it possible to obtain easily and rapidly, without skill or special equipment, a tungsten micro-electrode tip in a very few seconds.
- Published
- 1977
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- View/download PDF
33. Dermorphin, a new peptide from amphibian skin, inhibits the nociceptive thalamic neurons firing rate evoked by noxious stimuli.
- Author
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Braga PC, Tiengo M, Biella G, Dall'Oglio G, and Fraschini F
- Subjects
- Action Potentials drug effects, Animals, Male, Naloxone pharmacology, Oligopeptides antagonists & inhibitors, Oligopeptides therapeutic use, Opioid Peptides, Rats, Rats, Inbred Strains, Analgesics, Oligopeptides pharmacology, Pain drug therapy, Thalamic Nuclei drug effects
- Abstract
Dermorphin is the representative of a new class of potent opioid peptides occurring in amphibian skin and possesses the unique feature of having a D-Ala residue incorporated in the peptide molecule. The effect of dermorphin on the spontaneous and evoked neuronal activity by a nociceptive stimulus was studied in the nucleus lateralis anterior and ventrobasal complex of the rat thalamus. The high firing frequency induced by nociceptive stimuli was blocked when dermorphin was injected intraperitoneally at the dose of 1.5 mg/kg. The action starts about 10 min after injection and lasts on average for 120 min. Naloxone, a specific opioid antagonist, injected i.p. at a dose of 1 mg/kg antagonized the effect of dermorphin. The dermorphin time-course is about twice that of morphine (1.5 mg/kg i.p.) under the same experimental conditions.
- Published
- 1984
- Full Text
- View/download PDF
34. Simple and precise method for counting ciliary beats directly from the TV monitor screen.
- Author
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Braga PC, Dall'Oglio G, Bossi R, and Allegra L
- Subjects
- Cilia drug effects, Expectorants pharmacology, Humans, Nasal Mucosa physiology, Nasal Mucosa ultrastructure, Television, Terpenes pharmacology, Cilia physiology
- Abstract
The modern optical microscopic technique together with the use of the small perfusion chamber allows the maintenance and observation of isolated ciliated epithelia for many hours in vitro. Counting ciliary beats is a good means for evaluating the behavior of these cells immediately under different environmental conditions and also for evaluating the pharmacologic or toxic action of drugs. Using a TV camera joined to a microscope equipped with the Nomarsky differential interference contrast set, it is possible to see on a TV monitor an image of the cilia at a very high magnification (over 1000 X), with a good resolution. This paper describes a method and an instrument, with a digital readout purposely designed to receive and count signals from a phototransistor placed directly on the protective screen of the TV monitor to correspond exactly with the point of passage of the coming and going movement of the selected cilia. In this way, it is possible to obtain (in real time and in a simple way through visual observation of the beat) the final count, which consists of the number of passages, in a prefixed time, in front of the phototransistors of the dark area which represents the ciliary body on the light background.
- Published
- 1986
- Full Text
- View/download PDF
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