38 results on '"I. Paulino"'
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2. Editorial: Advances in mesosphere and thermosphere dynamics
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A. Guharay, S. Sarkhel, and I. Paulino
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atmosphere ,atmospheric dynamics ,waves and tides ,mesosphere and lower thermosphere ,ionosphere ,Astronomy ,QB1-991 ,Geophysics. Cosmic physics ,QC801-809 - Published
- 2024
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3. Signature of gravity wave propagations from the troposphere to ionosphere
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H. Takahashi, C. A. O. B. Figueiredo, P. Essien, C. M. Wrasse, D. Barros, P. K. Nyassor, I. Paulino, F. Egito, G. M. Rosa, and A. H. R. Sampaio
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Science ,Physics ,QC1-999 ,Geophysics. Cosmic physics ,QC801-809 - Abstract
We observed a gravity wave (GW) signature in the OH emission layer in the upper mesosphere, and 4 h later, a medium-scale travelling ionospheric disturbance (MSTID) in the OI 630 nm emission layer. Spectral analysis of the two waves showed that both have almost the same wave characteristics: wavelength, period, phase speed and propagation direction, respectively, 200 km, 60 min, 50 m s−1, toward the southeast. From the gravity wave ray-tracing simulation for the mesospheric gravity wave, we found that the wave came from a tropospheric deep convection spot and propagated up to the 140 km altitude. Regarding the same wave characteristics between mesospheric GW and ionospheric MSTID, the two possible cases are investigated: a direct influence of the GW oscillation in the OI 630 nm emission height and the generation of a secondary wave during the GW breaking process. This is the first time to report an observational event of gravity wave propagation from the troposphere, mesosphere to thermosphere–ionosphere in the South American region.
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- 2022
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4. Sources of concentric gravity waves generated by a moving mesoscale convective system in southern Brazil
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P. K. Nyassor, C. M. Wrasse, I. Paulino, E. F. M. T. São Sabbas, J. V. Bageston, K. P. Naccarato, D. Gobbi, C. A. O. B. Figueiredo, T. T. Ayorinde, H. Takahashi, and D. Barros
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Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
The studies on the sources of three concentric gravity waves (CGWs) excited by a moving mesoscale convective system (MCS) on the night of 1–2 October 2019 are investigated. These CGWs were observed using a hydroxyl (OH) all-sky imager, whereas the MCS was observed by the Geostationary Operational Environmental Satellite (GOES). Using 2D spectral analysis, we observed that the three CGWs have horizontal wavelength λH between ∼30–55 km, phase speed cH∼70–90 m s−1, and period τ∼7–12 min. Using backward ray tracing, we found that two of the CGWs were excited from convective cores within the MCS. We also found that the epicenters of the two waves were close to the tropopause positions of the ray-traced paths and nearby convective cores. Regarding the source, we verified that on this night the tropopause was ∼-80 ∘C, which was ∼10 ∘C colder than the days preceding and after the MCS and also colder than usually observed. Since the tropopause height and temperature are fundamental parameters underlying the analysis of the overshooting extent, we developed our own methodology to establish a reference tropopause that would enable a quantitative estimate of this parameter. Since the MCS (CGWs source) was moving, the overshooting convective cores were tracked in space and time. Using the tracking of the overshooting tops (OTs) in space and time with the aid of reverse ray tracing, we found that two out of the three CGWs were excited by the MCS, whereas the source of the remaining one was not directly associated with the MCS.
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- 2022
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5. Influence of the semidiurnal lunar tide in the equatorial plasma bubble zonal drifts over Brazil
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I. Paulino, A. R. Paulino, A. F. Medeiros, C. M. Wrasse, R. A. Buriti, and H. Takahashi
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Science ,Physics ,QC1-999 ,Geophysics. Cosmic physics ,QC801-809 - Abstract
Using OI6300 airglow images collected over São João do Cariri (7.4∘ S, 36.5∘ W) from 2000 to 2007, the equatorial plasma bubble (EPB) zonal drifts were calculated. A strong day-to-day variability was observed in the EPB zonal drifts, which is directly associated with the very complex dynamics of the nighttime thermosphere–ionosphere system near the Equator. The present work investigated the contribution of the semidiurnal lunar tide M2 for the EPB zonal drifts. The M2 presented an amplitude of 3.1 m s−1 in the EPB zonal drifts, which corresponds to 5.6 % of the average drifts. The results showed that the M2 amplitudes in the EPB zonal drifts were solar cycle and seasonally dependent. The amplitude of the M2 was stronger during the high solar activity, reaching over 10 % of the EPB zonal drift average. Regarding the seasons, during the Southern Hemisphere summer, the M2 amplitude was twice as large (12 %) compared to the equinox ones. The seasonality agrees with other observations of the M2 in the ionospheric parameters such as vertical drifts and electron concentration, for instance. On the other hand, the very large M2 amplitudes found during the high solar activity agree with previous observations of the lunar tide in the ionospheric E region.
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- 2021
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6. Variability of the lunar semidiurnal tidal amplitudes in the ionosphere over Brazil
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A. R. Paulino, F. D. S. Araújo, I. Paulino, C. M. Wrasse, L. M. Lima, P. P. Batista, and I. S. Batista
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Science ,Physics ,QC1-999 ,Geophysics. Cosmic physics ,QC801-809 - Abstract
The variability in the amplitudes of the lunar semidiurnal tide was investigated using maps of total electron content over Brazil from January 2011 to December 2014. Long-period variability showed that the annual variation is always present in all investigated magnetic latitudes, and it represents the main component of the temporal variability. Semiannual and triannual (two and three times a year, respectively) oscillations were the second and third components, respectively, but they presented significant temporal and spatial variability without a well-defined pattern. Among the short-period oscillations in the amplitude of the lunar tide, the most pronounced ones were concentrated between 7–11 d. These oscillations were stronger around the equinoxes, in particular between September and November in almost all latitudes. In some years, as in 2013 and 2014, for instance, they appeared with a large power spectral density in the winter hemisphere. These observed short-period oscillations could be a result of a direct modulation of the lunar semidiurnal tide by planetary waves from the lower atmosphere and/or due to electrodynamic coupling of E and F regions of the ionosphere.
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- 2021
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7. Diurnal mesospheric tidal winds observed simultaneously by meteor radars in Costa Rica (10° N, 86° W) and Brazil (7° S, 37° W)
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R. A. Buriti, W. Hocking, P. P. Batista, I. Paulino, A. R. Paulino, M. Garbanzo-Salas, B. Clemesha, and A. F. Medeiros
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Science ,Physics ,QC1-999 ,Geophysics. Cosmic physics ,QC801-809 - Abstract
This paper presents a study of diurnal tidal winds observed simultaneously by two meteor radars located on each side of the Equator in the equatorial region. The radars were located in Santa Cruz, Costa Rica (10.3∘ N, 85.6∘ W) (hereafter CR) and São João do Cariri, Brazil (7.4∘ S, 36.5∘ W) (hereafter CA). The distance between the sites is 5800 km. Harmonic analysis has been used to obtain amplitudes and phases (hour of peak amplitude) for diurnal, semidiurnal and terdiurnal tides between 82 and 98 km altitude, but in this work we concentrate on the diurnal component. The period of observation was from April 2005 to January 2006. The results were compared to the Global Scale Waves Model (GSWM-09). Magnitudes of zonal and meridional amplitudes from November to January for CR were quite different from the predictions of the model. Concerning phases, the agreement between model and radar meridional tidal phases at each site was good, and a vertical wavelength of 24 km for the diurnal tide was observed practically every month, although on some occasions determination of the vertical wavelength was difficult, especially for the zonal component, due to nonlinear phase variations with height. For the diurnal zonal amplitude, there were notable differences between the two sites. We attribute this site-to-site difference of the diurnal zonal amplitude to the nonmigrating component of the tide and propose that an anomaly was present in the troposphere in the winter (Northern Hemisphere) of 2005–2006 which produced substantial longitudinal variation.
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- 2020
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8. Evaluation of possible corrosion enhancement due to telluric currents: case study of the Bolivia–Brazil pipeline
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J. F. de Moraes, I. Paulino, L. R. Alves, and C. M. Denardini
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Science ,Physics ,QC1-999 ,Geophysics. Cosmic physics ,QC801-809 - Abstract
The electric field induced in the Bolivia–Brazil gas pipeline (GASBOL) was calculated by using the distributed source line transmission (DSLT) theory during several space weather events. We used geomagnetic data collected by a fluxgate magnetometer located at São José dos Campos (23.2∘ S, 45.9∘ W). The total corrosion rate was calculated by using the Gummow (2002) methodology and was based on the assumption of a 1 cm hole in the coating of the pipeline. The calculations were performed at the ends of pipeline where the largest “out-of-phase” pipe-to-soil potential (PSP) variations were obtained. The variations in PSP during the 17 March 2015 geomagnetic storm have led to the greatest corrosion rate of the analyzed events. All the space weather events evaluated with high terminating impedance may have contributed to increases in the corrosion process. The applied technique can be used to evaluate the corrosion rate due to the high telluric activity associated with the geomagnetic storms at specific locations.
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- 2020
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9. Investigation of sources of gravity waves observed in the Brazilian equatorial region on 8 April 2005
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O. Dare-Idowu, I. Paulino, C. A. O. B. Figueiredo, A. F. Medeiros, R. A. Buriti, A. R. Paulino, and C. M. Wrasse
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Science ,Physics ,QC1-999 ,Geophysics. Cosmic physics ,QC801-809 - Abstract
On 8 April 2005, strong gravity wave (GW) activity (over a period of more than 3 h) was observed in São João do Cariri (7.4∘ S, 36.5∘ W). These waves propagated to the southeast and presented different spectral characteristics (wavelength, period and phase speed). Using hydroxyl (OH) airglow images, the characteristics of the observed GWs were calculated; the wavelengths ranged between 90 and 150 km, the periods ranged from ∼26 to 67 min and the phase speeds ranged from 32 to 71 m s−1. A reverse ray-tracing analysis was performed to search for the possible sources of the waves that were detected. The ray-tracing database was composed of temperature profiles from the Naval Research Laboratory Mass Spectrometer Incoherent Scatter (NRLMSISE-00) model and SABER measurements as well as wind profiles from the Horizontal Wind Model (HWM) and meteor radar data. According to the ray tracing result, the likely source of these observed gravity waves was the Intertropical Convergence Zone, which caused intense convective processes to take place in the northern part of the observatory. Also, the observed preferential propagation direction of the waves to the southeast could be explained using blocking diagrams, i.e. due to the wind filtering process.
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- 2020
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10. Semimonthly oscillation observed in the start times of equatorial plasma bubbles
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I. Paulino, A. R. Paulino, R. Y. C. Cueva, E. Agyei-Yeboah, R. A. Buriti, H. Takahashi, C. M. Wrasse, Â. M. Santos, A. Fragoso de Medeiros, and I. S. Batista
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Science ,Physics ,QC1-999 ,Geophysics. Cosmic physics ,QC801-809 - Abstract
Using airglow data from an all-sky imager deployed at São João do Cariri (7.4∘ S, 36.5∘ W), the start times of equatorial plasma bubbles was studied in order to investigate the day-to-day variability of this phenomenon. Data from a period over 10 years were analyzed from 2000 to 2010. Semimonthly oscillations were clearly observed in the start times of plasma bubbles from OI6300 airglow images during this period of observation, and four case studies (September 2003, September–October 2005, November 2005 and January 2008) were chosen to show in detail this kind of modulation. Since the airglow measurements are not continuous in time, more than one cycle of oscillation in the start times of plasma bubbles cannot be observed from these data. Thus, data from a digisonde at São Luís (2.6∘ S, 44.2∘ W) in November 2005 were used to corroborate the results. Technical/climate issues did not allow one to observe the semimonthly oscillations simultaneously by the two instruments, but from October to November 2005 there was a predominance of this oscillation in the start times of the irregularities over Brazil. Besides, statistical analysis for the data in the whole period of observation has shown that the lunar tide, which has semimonthly variability, is likely the main forcing for the semimonthly oscillation in the start times of equatorial plasma bubbles. The presence of this oscillation can contribute to the day-to-day variability of equatorial plasma bubbles.
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- 2020
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11. Seasonal characteristics of small- and medium-scale gravity waves in the mesosphere and lower thermosphere over the Brazilian equatorial region
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P. Essien, I. Paulino, C. M. Wrasse, J. A. V. Campos, A. R. Paulino, A. F. Medeiros, R. A. Buriti, H. Takahashi, E. Agyei-Yeboah, and A. N. Lins
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Science ,Physics ,QC1-999 ,Geophysics. Cosmic physics ,QC801-809 - Abstract
The present work reports seasonal characteristics of small- and medium-scale gravity waves in the mesosphere and lower thermosphere (MLT) region. All-sky images of the hydroxyl (NIR-OH) airglow emission layer over São João do Cariri (7.4° S, 36.5° W; hereafter Cariri) were obtained from September 2000 to December 2010, during a total of 1496 nights. For investigation of the characteristics of small-scale gravity waves (SSGWs) and medium-scale gravity waves (MSGWs), we employed the Fourier two-dimensional (2-D) spectrum and keogram fast Fourier transform (FFT) techniques, respectively. From the 11 years of data, we could observe 2343 SSGW and 537 MSGW events. The horizontal wavelengths of the SSGWs were concentrated between 10 and 35 km, while those of the MSGWs ranged from 50 to 200 km. The observed periods for SSGWs were concentrated around 5 to 20 min, whereas the MSGWs ranged from 20 to 60 min. The observed horizontal phase speeds of SSGWs were distributed around 10 to 60 m s−1, and the corresponding MSGWs were around 20 to 120 m s−1. In summer, autumn, and winter both SSGWs and MSGWs propagated preferentially northeastward and southeastward, while in spring the waves propagated in all directions. The critical level theory of atmospheric gravity waves (AGWs) was applied to study the effects of wind filtering on SSGW and MSGW propagation directions. The SSGWs were more susceptible to wind filtering effects than MSGWs. The average of daily mean outgoing longwave radiation (OLR) was also used to investigate the possible wave source region in the troposphere. The results showed that in summer and autumn, deep convective regions were the possible source mechanism of the AGWs. However, in spring and winter the deep convective regions did not play an important role in the waves observed at Cariri, because they were too far away from the observatory. Therefore, we concluded that the horizontal propagation directions of SSGWs and MSGWs show clear seasonal variations based on the influence of the wind filtering process and wave source location.
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- 2018
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12. Determination of gravity wave parameters in the airglow combining photometer and imager data
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P. K. Nyassor, R. A. Buriti, I. Paulino, A. F. Medeiros, H. Takahashi, C. M. Wrasse, and D. Gobbi
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Science ,Physics ,QC1-999 ,Geophysics. Cosmic physics ,QC801-809 - Abstract
Mesospheric airglow measurements of two or three layers were used to characterize both vertical and horizontal parameters of gravity waves. The data set was acquired coincidentally from a multi-channel filter (Multi-3) photometer and an all-sky imager located at São João do Cariri (7.4° S, 36.5° W) in the equatorial region from 2001 to 2007. Using a least-square fitting and wavelet analysis technique, the phase and amplitude of each observed wave were determined, as well as the amplitude growth. Using the dispersion relation of gravity waves, the vertical and horizontal wavelengths were estimated and compared to the horizontal wavelength obtained from the keogram analysis of the images observed by an all-sky imager. The results show that both horizontal and vertical wavelengths, obtained from the dispersion relation and keogram analysis, agree very well for the waves observed on the nights of 14 October and 18 December 2006. The determined parameters showed that the observed wave on the night of 18 December 2006 had a period of ∼ 43.8 ± 2.19 min, with the horizontal wavelength of 235.66 ± 11.78 km having a downward phase propagation, whereas that of 14 October 2006 propagated with a period of ∼ 36.00 ± 1.80 min with a horizontal wavelength of ∼ 195 ± 9.80 km, and with an upward phase propagation. The observation of a wave taken by a photometer and an all-sky imager allowed us to conclude that the same wave could be observed by both instruments, permitting the investigation of the two-dimensional wave parameter.
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- 2018
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13. Case study of mesospheric front dissipation observed over the northeast of Brazil
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A. F. Medeiros, I. Paulino, C. M. Wrasse, J. Fechine, H. Takahashi, J. V. Bageston, A. R. Paulino, and R. A. Buriti
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Science ,Physics ,QC1-999 ,Geophysics. Cosmic physics ,QC801-809 - Abstract
On 3 October 2005 a mesospheric front was observed over São João do Cariri (7.4° S, 36.5° W). This front propagated to the northeast and appeared in the airglow images on the west side of the observatory. By about 1.5 h later, it dissipated completely when the front crossed the local zenith. Ahead of the front, several ripple structures appeared during the dissipative process of the front. Using coincident temperature profile from the TIMED/SABER satellite and wind profiles from a meteor radar at São João do Cariri, the background of the atmosphere was investigated in detail. On the one hand, it was noted that a strong vertical wind shear in the propagation direction of the front produced by a semidiunal thermal tide was mainly responsible for the formation of duct (Doppler duct), in which the front propagated up to the zenith of the images. On the other hand, the evolution of the Richardson number as well as the appearance of ripples ahead of the main front suggested that a presence of instability in the airglow layer that did not allow the propagation of the front to the other side of the local zenith.
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- 2018
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14. Mesospheric front observations by the OH airglow imager carried out at Ferraz Station on King George Island, Antarctic Peninsula, in 2011
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G. A. Giongo, J. V. Bageston, P. P. Batista, C. M. Wrasse, G. D. Bittencourt, I. Paulino, N. M. Paes Leme, D. C. Fritts, D. Janches, W. Hocking, and N. J. Schuch
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Science ,Physics ,QC1-999 ,Geophysics. Cosmic physics ,QC801-809 - Abstract
The main goals of this work are to characterize and investigate the potential wave sources of four mesospheric fronts identified in the hydroxyl near-infrared (OH-NIR) airglow images, obtained with an all-sky airglow imager installed at Comandante Ferraz Antarctic Station (EACF, as per its Portuguese acronym) located on King George Island in the Antarctic Peninsula. We identified and analyzed four mesospheric fronts in 2011 over King George Island. In addition, we investigate the atmospheric background environment between 80 and 100 km altitude and discuss the ducts and propagation conditions for these waves. For that, we used wind data obtained from a meteor radar operated at EACF and temperature data obtained from the TIMED/SABER satellite. The vertical wavenumber squared, m2, was calculated for each of the four waves. Even though no clearly defined duct (indicated by positive values of m2 sandwiched between layers above and below with m2
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- 2018
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15. Intrinsic parameters of periodic waves observed in the OI6300 airglow layer over the Brazilian equatorial region
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I. Paulino, J. F. Moraes, G. L. Maranhão, C. M. Wrasse, R. A. Buriti, A. F. Medeiros, A. R. Paulino, H. Takahashi, J. J. Makela, J. W. Meriwether, and J. A. V. Campos
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Science ,Physics ,QC1-999 ,Geophysics. Cosmic physics ,QC801-809 - Abstract
Periodic waves were observed in the OI6300 airglow images over São João do Cariri (36.5° W, 7.4° S) from 2012 to 2014 with simultaneous observations of the thermospheric wind using two Fabry–Pérot interferometers (FPIs). The FPIs measurements were carried out at São João do Cariri and Cajazeiras (38.5° W, 6.9° S). The observed spectral characteristics of these waves (period and wavelength) as well the propagation direction were estimated using two-dimensional Fourier analysis in the airglow images. The horizontal thermospheric wind was calculated from the Doppler shift of the OI6300 data extracted from interference fringes registered by the FPIs. Combining these two techniques, the intrinsic parameters of the periodic waves were estimated and analyzed. The spectral parameters of the periodic waves were quite similar to the previous observations at São João do Cariri. The intrinsic periods for most of the waves were shorter than the observed periods, as a consequence, the intrinsic phase speeds were faster compared to the observed phase speeds. As a consequence, these waves can easily propagate into the thermosphere–ionosphere since the fast gravity waves can skip turning and critical levels. The strength and direction of the wind vector in the thermosphere must be the main cause for the observed anisotropy in the propagation direction of the periodic waves, even if the sources of these waves are assumed to be isotropic.
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- 2018
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16. Effects of the midnight temperature maximum observed in the thermosphere–ionosphere over the northeast of Brazil
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C. A. O. B. Figueiredo, R. A. Buriti, I. Paulino, J. W. Meriwether, J. J. Makela, I. S. Batista, D. Barros, and A. F. Medeiros
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Science ,Physics ,QC1-999 ,Geophysics. Cosmic physics ,QC801-809 - Abstract
The midnight temperature maximum (MTM) has been observed in the lower thermosphere by two Fabry–Pérot interferometers (FPIs) at São João do Cariri (7.4° S, 36.5° W) and Cajazeiras (6.9° S, 38.6° W) during 2011, when the solar activity was moderate and the solar flux was between 90 and 155 SFU (1 SFU = 10−22 W m−2 Hz−1). The MTM is studied in detail using measurements of neutral temperature, wind and airglow relative intensity of OI630.0 nm (referred to as OI6300), and ionospheric parameters, such as virtual height (h′F), the peak height of the F2 region (hmF2), and critical frequency of the F region (foF2), which were measured by a Digisonde instrument (DPS) at Eusébio (3.9° S, 38.4° W; geomagnetic coordinates 7.31° S, 32.40° E for 2011). The MTM peak was observed mostly along the year, except in May, June, and August. The amplitudes of the MTM varied from 64 ± 46 K in April up to 144 ± 48 K in October. The monthly temperature average showed a phase shift in the MTM peak around 0.25 h in September to 2.5 h in December before midnight. On the other hand, in February, March, and April the MTM peak occurred around midnight. International Reference Ionosphere 2012 (IRI-2012) model was compared to the neutral temperature observations and the IRI-2012 model failed in reproducing the MTM peaks. The zonal component of neutral wind flowed eastward the whole night; regardless of the month and the magnitude of the zonal wind, it was typically within the range of 50 to 150 m s−1 during the early evening. The meridional component of the neutral wind changed its direction over the months: from November to February, the meridional wind in the early evening flowed equatorward with a magnitude between 25 and 100 m s−1; in contrast, during the winter months, the meridional wind flowed to the pole within the range of 0 to −50 m s−1. Our results indicate that the reversal (changes in equator to poleward flow) or abatement of the meridional winds is an important factor in the MTM generation. From February to April and from September to December, the h′F and the hmF2 showed an increase around 18:00–20:00 LT within a range between 300 and 550 km and reached a minimal height of about 200–300 km close to midnight; then the layer rose again by about 40 km or, sometimes, remained at constant height. Furthermore, during the winter months, the h′F and hmF2 showed a different behavior; the signature of the pre-reversal enhancement did not appear as in other months and the heights did not exceed 260 and 350 km. Our observation indicated that the midnight collapse of the F region was a consequence of the MTM in the meridional wind that was reflected in the height of the F region. Lastly, the behavior of the OI6300 showed, from February to April and from September to December, an increase in intensity around midnight or 1 h before, which was associated with the MTM, whereas, from May to August, the relative intensity was more intense in the early evening and decayed during the night.
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- 2017
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17. Periodic waves in the lower thermosphere observed by OI630 nm airglow images
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I. Paulino, A. F. Medeiros, S. L. Vadas, C. M. Wrasse, H. Takahashi, R. A. Buriti, D. Leite, S. Filgueira, J. V. Bageston, J. H. A. Sobral, and D. Gobbi
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Science ,Physics ,QC1-999 ,Geophysics. Cosmic physics ,QC801-809 - Abstract
Periodic wave structures in the thermosphere have been observed at São João do Cariri (geographic coordinates: 36.5° W, 7.4° S; geomagnetic coordinates based on IGRF model to 2015: 35.8° E, 0.48° N) from September 2000 to November 2010 using OI630.0 nm airglow images. During this period, which corresponds to almost one solar cycle, characteristics of 98 waves were studied. Similarities between the characteristics of these events and observations at other places around the world were noted, primarily the spectral parameters. The observed periods were mostly found between 10 and 35 min; horizontal wavelengths ranged from 100 to 200 km, and phase speed from 30 to 180 m s−1. These parameters indicated that some of the waves, presented here, are slightly faster than those observed previously at low and middle latitudes (Indonesia, Carib and Japan), indicating that the characteristics of these waves may change at different places. Most of observed waves have appeared during magnetically quiet nights, and the occurrence of those waves followed the solar activity. Another important characteristic is the quasi-monochromatic periodicity that distinguish them from the single-front medium-scale traveling ionospheric disturbances (MSTIDs) that have been observed previously over the Brazilian region. Moreover, most of the observed waves did not present a phase front parallel to the northeast–southwest direction, which is predicted by the Perkins instability process. It strongly suggests that most of these waves must have had different generation mechanisms from the Perkins instability, which have been pointed out as being a very important mechanism for the generation of MSTIDs in the lower thermosphere.
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- 2016
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18. Mesospheric gravity wave characteristics and identification of their sources around spring equinox over Indian low latitudes
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M. Sivakandan, I. Paulino, A. Taori, and K. Niranjan
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Environmental engineering ,TA170-171 ,Earthwork. Foundations ,TA715-787 - Abstract
We report OI557.7 nm night airglow observations with the help of a charged-couple device (CCD)-based all-sky camera from a low-latitude station, Gadanki (13.5° N; 79.2° E). Based on the data collected during March and April over 3 years, from 2012 to 2014 (except March 2013), we characterize the small-scale gravity wave properties. During this period, 50 gravity wave events were detected. The horizontal wavelengths of the gravity waves are found to ranging from 12 to 42 km with the phase velocity 20–90 m s−1. In most cases, these waves were propagating northward with only a few occurrences of southward propagation. In the present novel investigation from the Indian sector, each of the wave events was reverse-ray-traced to its source. The outgoing longwave radiation (OLR) suggested that tropospheric convection was a possible source for generation of the observed waves. It was found that approximately 66 % of the events were triggered directly by the convection.
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- 2016
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19. Twin mesospheric bores observed over Brazilian equatorial region
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A. F. Medeiros, I. Paulino, M. J. Taylor, J. Fechine, H. Takahashi, R. A. Buriti, L. M. Lima, and C. M. Wrasse
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Science ,Physics ,QC1-999 ,Geophysics. Cosmic physics ,QC801-809 - Abstract
Two consecutive mesospheric bores were observed simultaneously by two all-sky cameras on 19 December 2006. The observations were carried out in the northeast of Brazil at two different stations: São João do Cariri (36.5° W, 7.4° S) and Monteiro (37.1° W, 7.9° S), which are by about 85 km apart. The mesospheric bores were observed within an interval of ∼ 3 h in the NIR OH and OI557.7 nm airglow emissions. Both bores propagated to the east and showed similar characteristics. However, the first one exhibited a dark leading front with several trailing waves behind and progressed into a brighter airglow region, while the second bore, observed in the OH layer, was comprised of several bright waves propagating into a darker airglow region. This is the first paper to report events like these, called twin mesospheric bores. The background of the atmosphere during the occurrence of these events was studied by considering the temperature profiles from the TIMED/SABER satellite and wind from a meteor radar.
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- 2016
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20. Investigations on Concentric Gravity Wave Sources Over the Brazilian Equatorial Region
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P. K. Nyassor, C. M. Wrasse, I. Paulino, D. Gobbi, E. Yiğit, H. Takahashi, P. P. Batista, K. P. Naccarato, R. A. Buriti, A. R. Paulino, D. Barros, and C. A. O. B. Figueiredo
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Atmospheric Science ,Geophysics ,Space and Planetary Science ,Earth and Planetary Sciences (miscellaneous) - Published
- 2022
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21. AB0216 FATIGUE ASSESSMENT IN RHEUMATOID ARTHRITIS, SANTO DOMINGO, DOMINICAN REPUBLIC
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R. A. Alvarez Santana, D. Garcia, J. Santana Peralta, A. Cornelio, L. Concepción Sanchez, T. Polanco Mora, I. Paulino, I. Mercedes, E. Rodriguez Bautista, T. Valdez, A. Feriz, and R. Muñoz Louis
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Rheumatology ,Immunology ,Immunology and Allergy ,General Biochemistry, Genetics and Molecular Biology - Abstract
BackgroundRheumatoid arthritis (RA) is an inflammatory, systemic autoimmune disease affecting the synovial membrane of small joints.1 Wagan A. et al demonstrated that the frequency of fatigue in rheumatoid arthritis is 62%,2 Hammam et al described a higher rate of fatigue associated with higher disease activity. Fatigue is as a feeling of exhaustion, also as a reduction in physical and mental capacity,3,4 it can be measured with the scale FACIT-F (Functional Assessment of Chronic Illness Therapy-Fatigue), which evaluates the last 7 days, with a score of 0-52. For the severity analysis, 4 grades are used: no or mild fatigue (40-52), moderate (27-39), severe (14-26) and extreme fatigue (0-13).2,5ObjectivesTo evaluate the frequency and degree of fatigue in rheumatoid arthritis.MethodsProspective, observational, cross-sectional study of a cohort of patients of the Rheumatology Service of the Hospital Docente Padre Billini. Patients were interviewed in July 2021. Inclusion criteria: ≥ 18 years, diagnosis of RA according to the ACR/EULAR 2010 classification criteria. Exclusion criteria: previous diagnosis of fibromyalgia, depression or anxiety, treatment with antidepressants, antihistamines, beta-blockers. Scales measured: FACIT-F, DAS28, CDAI, and HAQ-DI. Statistical analysis was performed with the Pearson correlation (rp). Data were analyzed in IBM-SPSS v23.Results597 patients met inclusion criteria. 93% female, mean age 58.5±12.4 years, mean disease duration 7.5 years. HT 73.9% (441), DM 14.2% (85), dyslipidemia 21.3% (127), obesity 17.9% (107), smoking 9.9% (59), high ESR 60.0% (358), high CRP 49.7% (297), scDMARD8 2.7% (494), bDMARDS 36.8% (218), tsDMARDS 18.1 (108). Frequency of fatigue 19.9% (119): moderate 12.9% (77), severe 7.0% (42). Correlation of FACIT-F with DAS28, CDAI and HAQ-DI: No fatigue FACIT-F 80.1% (478): DAS28 remission or low activity 84.9% (406), CDAI remission or low activity 93.5% (447), moderate 4.0% (19), high activity 2.5% (12), HAQ-DI mild 75.9% (363), moderate 16.5% (79), severe 7.5% (36). Moderate FACIT-F 12.9% (77): DAS28 remission or low activity 19.5% (15), moderate 80.5% (62), CDAI moderate 48.1% (37), high activity 51.9% (40), HAQ-DI mild 24.7% (19), moderate 63.6% (49), severe 11.7% (9). Severe FACIT-F 7.0% (42): DAS28 remission or low activity 4.8% (2), high activity 95.2% (40), CDAI low activity or remission 35.7% (15), high activity 64.3% (27), HAQ-DI mild 7.1% (3), moderate 23.8% (10), severe 69.0% (29). Correlation between FACIT-F/DAS28 (rp= .673, p< .001) and FACIT-F/CDAI (rp= .701, p < .001) were strong.ConclusionThe study showed a low frequency of fatigue; the degree of fatigue most found was moderate. The group of patients with fatigue had a statistically significant linear association with disease activity and degree of functional limitation. There were no patients with extreme fatigue.References[1]Gomero García, D., 2018. Rheumatoid arthritis, epidemiology, pathophysiology, diagnostic criteria and treatment. Journal of Medicine and Research Universidad Autónoma del Estado de México, 6(2).[2]Wagan AA, Raheem A, Bhatti A, Zafar T. Fatigue assessment by FACIT-F scale in Pakistani cohort with Rheumatoid Arthritis (FAF-RA) study. Pak J Med Sci. 2021;37(4).[3]Hammam N, Gamal RM, Rashed AM, Elfetoh NA, Mosad E, Khedr EM. Fatigue in Rheumatoid Arthritis Patients: Association With Sleep Quality, Mood Status, and Disease Activity. Rheumatol Clin (Engl Ed). 2020 Sep-Oct;16(5 Pt 1):339-344.[4]James K, Al-Ali S, Tarn J, Cockell SJ, Gillespie CS, Hindmarsh V, et al. (2015) A Transcriptional Signature of Fatigue Derived from Patients with Primary Sjögren’s Syndrome. PLoS ONE.[5]Cella D. The Functional Assessment of Cancer Therapy-Anemia (FACT-An) Scale: a new tool for the assessment of outcomes in cancer anemia and fatigue. Semin Hematol. 1997 Jul;34(3 Suppl 2):13-9.Disclosure of InterestsNone declared
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- 2022
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22. AB0827 Frequency of sexual dysfunction axial spondyloarthritis, Santo Domingo, Dominican Republic
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A. Cornelio, T. Polanco Mora, J. Santana Peralta, R. A. Alvarez Santana, D. Garcia, E. Rodriguez Bautista, I. Paulino, L. Concepción Sanchez, I. Mercedes, T. Valdez, A. Feriz, and R. Muñoz Louis
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Rheumatology ,Immunology ,Immunology and Allergy ,General Biochemistry, Genetics and Molecular Biology - Abstract
BackgroundAxial spondyloarthritis (SpAa) is a chronic inflammatory disease of unknown etiology that affects the axial skeleton, affecting peripheral joints, entheses and extra-articular structures, with a prevalence of 0.5-1% associated with HLA-B27+.1 The impact of Chronic disease is often multifactorial that affects physical, hormonal and psychological alterations, leading to problems of sexuality.2 The CSFQ-14 (Changes in Sexual Functioning Questionnaire), evaluates changes in sexual functioning due to disease and/or or treatment in 5 domains with a score range of 14-70; cut-off point indicating sexual dysfunction 3,4ObjectivesTo evaluate the frequency and degree of sexual dysfunction in patients with axial spondyloarthritis.MethodsProspective, observational, cross-sectional study. of the SpAa cohort of the Hospital Docente Padre Billini rheumatology service Patients were interviewed in July 2021. Inclusion criteria: > 18 years, diagnosis of SpAa according to the ASAS 2009 classification criteria, at least 1 sexual. Exclusion criteria: previous diagnosis of another autoimmune disease, depression, diabetes mellitus (DM), treatment with antidepressants, antiepileptics, narcotics. Measurement of: CSFQ-14, BASDAI. Statistical analysis was performed with the Pearson correlation (rP) with p>0.05. The data was analyzed by SPSS V23.ResultsOf the SpAa cohort, 87 met the inclusion criteria. Male 67.8% (59), female 32.2% (28), mean age 45.7±8 years, mean diagnosis 7, married 67.8%(59), single 24.1%(21), widowed 8%(7), HLA-B27 + 51.1 %, hypertension 8% (7), diabetes 6.8% (6), dyslipidemia 10.3%(9), smokers 4.5%(4), 100% (87) bDMARD´s, 13.6% (12) combined with csDMARD´s, Frequency of sexual dysfunction 24.1%(21). Sexual dysfunction in women 6.9% (6) and men 17.2% (15) by CSFQ-14. Global domains: Desire/Interest 2.3% (2), Desire/Frequency 2.3% (2), Pleasure 5.7% (5), Arousal 2.3% (2), Orgasm/Completion 2.3% (2). Female: Desire/interest 6.8% (4), desire/Frequency 3.4% (2), pleasure 8.5% (5). Male: Desire/interest 3.4% (2), desire/Frequency 3.4% (2), pleasure 8.5% (5), arousal 6.8% (4), orgasm/completion 3.4% (2). Correlation CSFQ-14 domains with BASDAI: rp =. -0.088 p>0.05: Desire/interest dysfunction: inactive BASDAI 71.4% (15). Desire/frequency: inactive BASDAI 90.5% (20). Pleasure: inactive BASDAI 23.8% (5), active 23.8% (5). Excitation: inactive BASDAI 14.3% (3). Orgasm/completion> inactive BASDAI 90.5% (20)ConclusionThe study showed a low frequency of sexual dysfunction, being more frequent in males. The greatest dysfunction was found in the pleasure domain in both sexes. A statistically significant inverse linear association was found between sexual dysfunction and disease activity.References[1]Gunaydin, R., Karatepe, AG, Cesmeli, N. & Kaya, T. Fatiga en pacientes con espondilitis anquilosante: relaciones con variables específicas de la enfermedad, depresión y trastornos del sueño. Reumatología clínica 28, 1045-1051 (2009).[2]Helland, Y. et al. Enfermedades reumáticas y sexualidad: impacto de la enfermedad y estrategias de autocuidado. Arthritis Care Res. (Hoboken)63, 743–750 (2011).[3]Badley EM (2008) Enhancing the conceptual clarity of the activity and participation components of the International Classification of Functioning, Disability and Health. Soc Sci Med 66: 2335–2345[4]Clayton AH, McGarvey EL, Clavet GJ. The Changes in Sexual Functioning Questionnaire (CSFQ): development, reliability, and validity. Psychopharmacol Bull. 1997;33(4):731-45. PMID: 9493486.Disclosure of InterestsNone declared
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- 2022
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23. AB0682 Frequency of sexual dysfunction in systemic sclerosis, Santo Domingo, Dominican Republic
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J. Santana Peralta, A. Cornelio, D. Garcia, R. A. Alvarez Santana, T. Polanco Mora, L. Concepción Sanchez, I. Paulino, I. Mercedes, E. Rodriguez Bautista, T. Valdez Lorie, A. Feriz, and R. Muñoz Louis
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Rheumatology ,Immunology ,Immunology and Allergy ,General Biochemistry, Genetics and Molecular Biology - Abstract
BackgroundSystemic sclerosis (SSc) is a systemic autoimmune disease.1 Sexual function has been associated with a high prevalence of dissatisfaction.2,3,4 Various factors have been implicated as causes of impaired sexual function.5 CSFQ-14 (Changes in Sexual Functioning Questionnaire) assesses changes in sexual functioning due to disease and/or treatment in 5 domains with a score range of 14-70; cut-off point indicating sexual dysfunction < 41 men and < 47 women.6ObjectivesTo evaluate the frequency and degree of sexual dysfunction in patients with systemic sclerosis.MethodsProspective, observational, cross-sectional study of the cohort of the Rheumatology service at Hospital Docente Padre Billini. Patients were interviewed in November 2021. Inclusion criteria: > 18 years, diagnosis of SSc by ACR/EULAR 2013 classification criteria, at least 1 sexual relationship. Exclusion criteria: previous diagnosis of another autoimmune disease, depression, diabetes, treatment with antidepressants, antiepileptics, narcotics. Measurement of CSFQ-14, mRSS. Statistical analysis was performed with the Pearson correlation (rp) with p=>0.05. The data was analyzed by SPSS V23.ResultsOf 63 patients, 54 met the inclusion criteria. 100% female, mean age 53 + 15.07 years, mean duration 11.3 years, lSSc 24.1% (13), dSSc 75.9% (41), single 50% (27), married 44.4% (24), widowed 5.6% (3). Frequency of sexual dysfunction 81.5% (44). Domains: pleasure 79.6% (43), desire/interest 37% (20), frequency desire 81.5% (44), arousal 46.3% (25), orgasm/completion 75.9% (41). Correlation CSFQ-14 with mRSS: Pleasure dysfunction: normal mRSS 2.3% (1), mild 23.3% (10), moderate 20.9% (9), severe 32.6% (14), terminal 20.9% (9). Desire/interest dysfunction: mild mRSS 35% (7), moderate 20% (4), severe 35% (7), terminal 10% (2). Frequency desire dysfunction: normal mRSS 2.3% (1), mild 25% (11), moderate 15.7% (12), severe 36.4% (16), terminal 20.5% (9). Arousal dysfunction: normal mRSS 4% (1), mild 16% (4), moderate 16% (4), severe 36% (9), terminal 28% (7). Orgasm/completion dysfunction: normal mRSS 2.4% (1), mild 22% (9), moderate 22% (9), severe 26.8% (11), terminal 26.8% (11). rp=. 065 p> 0.05.ConclusionThe study demonstrated a high frequency of sexual dysfunction in most of the population studied. The desire/frequency dysfunction domain turned out to be the one with the highest presentation, followed by the orgasm/completion domain. A statistically significant linear association between sexual dysfunction and cutaneous activity of the disease was evidenced.References[1]Basta F, Afeltra A, Margiotta DPE. Fatigue in systemic sclerosis: a systematic review. Clin Exp Rheumatol. 2018[2]Heřmánková, B., 2019. Sexual Dysfunction in Patients with Systemic Sclerosis. New Insights into Systemic Sclerosis[3]Gao, R., Qing, P., Sun, X., Zeng, X., Hu, X., Zhang, S., Yang, Y. and Qin, L., 2021. Prevalence of Sexual Dysfunction in People With Systemic Sclerosis and the Associated Risk Factors: A Systematic Review. Sexual Medicine, 9(4), p.100392.[4]Frikha, F., Masmoudi, J., Saidi, N. and Bahloul, Z., 2014. Sexual dysfunction in married women with systemic sclerosis. Pan African Medical Journal, 17.[5]Levis B, Burri A, Hudson M, Baron M, Thombs BD, et al. (2012) Sexual Activity and Impairment in Women with Systemic Sclerosis Compared to Women from a General Population Sample. PLoS ONE 7(12): e52129.[6]Clayton AH, McGarvey EL, Clavet GJ. The Changes in Sexual Functioning Questionnaire (CSFQ): development, reliability, and validity. Psychopharmacol Bull. 1997;33(4):731-45.Disclosure of InterestsNone declared
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- 2022
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24. AB0963 Frequency of sexual dysfunction in psoriatic arthritis, Santo Domingo, Dominican Republic
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J. Santana Peralta, A. Cornelio, D. Garcia, R. A. Alvarez Santana, T. Polanco Mora, L. Concepción Sanchez, I. Paulino, I. Mercedes, E. Rodriguez Bautista, T. Valdez Lorie, A. Feriz, and R. Muñoz Louis
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Rheumatology ,Immunology ,Immunology and Allergy ,General Biochemistry, Genetics and Molecular Biology - Abstract
BackgroundPsoriatic arthritis (PsA) is an inflammatory joint disease that cause structural damage, disability, and an impairment of quality of life.1Sexual function is a neglected area of quality of life in patients with PsA, with a high prevalence of dissatisfaction.2 It has been described that there is no relationship between the activity of the disease and the degree of joint dysfunction.3 In 1 out of 5 patients consider that the disease negatively impacts their sexuality.4 CSFQ-14 (Changes in Sexual Functioning Questionnaire), evaluates changes in sexual functioning due to an illness or treatment in 5 domains with a score range 14-70; cut-off point indicating sexual dysfunction -41 men and -47 women.5ObjectivesTo evaluate the frequency and degree of sexual dysfunction in patients with psoriatic arthritis.MethodsProspective, observational, cross-sectional study. The patients of the outpatient clinic of the rheumatology service of the Padre Billini teaching hospital were interviewed during November 2021. Inclusion criteria: ≥18 years, PsA diagnosis according to CASPAR classification criteria 2006. Exclusion criteria: diagnosis of another autoimmune disease, depression, treatment with antidepressants. We analyzed the data in SPSS23 and used the Pearson correlation coefficient with a statistical significance p=Results58 met inclusion criteria. 63.8% (37) female, male 36.2% (21), mean age 54.8 + 11.75 y, mean diagnosis 7.9 y, married 55.2% (32), unmarried 39.7% (23), widowed 5.2% (3). Frequency of sexual dysfunction 39.7% (23), CSFQ-14 indicative of dysfunction in women 35.1% (23), men 47.6% (10). Female Domains: Pleasure dysfunction 35.1% (13), desire/interest 32.4% (12), desire/frequency 32.4% (12), arousal 24.3% (9), orgasm/completion 43.2% (16). Male Domains: Pleasure dysfunction 38.1% (8), desire/interest 47.6% (10), desire/frequency 33.3% (7), arousal 23.8% (5), orgasm/completion 42.9% (9). Correlation CSFQ-14/DAPSA28 domains: Pleasure dysfunction: DAPSA remission 19.2% (5), low 32.1% (9), moderate 50% (2). Desire/interest: DAPSA remission 34.6% (9), low 32.1% (9), moderate 100% (4). Desire/frequency: DAPSA remission 30.8% (8), low 37.5% (10), moderate 25% (1). Excitation: DAPSA remission 30.8% (8), low 17.9% (5), moderate 25% (1). Orgasm/completion: DAPSA remission 50% (13), low 37.5% (10), moderate 50% (2). rp=. 042 pConclusionThe study showed a modest frequency of global sexual dysfunction. In men it was superior. The orgasm/completion domain proved to be the most dysfunctional in both sexes. A statistically significant linear association of sexual dysfunction and disease activity was evident.References[1]Reygaerts T. Effect of Biologics on Fatigue in Psoriatic Arthritis: A Systematic Literature Review with Metaanalysis, Joint Bone Spine (2018).[2]Esteve E et al. Preliminary development of a questionnaire assessing the impact of psoriasis and psoriatic arthritis on patient’s perception of sexuality. Medicine (Baltimore). 2018[3]Aguiar R, Ambrósio C. Sexuality in spondyloarthritis-the impact of the disease. Acta Reumatol Port. 2014 Apr-Jun;39(2):152-7. PMID: 25254264.[4]G Haugeberg, (2020): Perceived influence of health status on sexual activity in patients with psoriatic arthritis, Scandinavian Journal of Rheumatology.[5]Clayton AH, McGarvey EL. The Changes in Sexual Functioning Questionnaire (CSFQ): development, reliability, and validity. Psychopharmacol Bull. 1997;33(4):731-45.Disclosure of InterestsNone declared
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- 2022
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25. AB0217 FREQUENCY OF SEXUAL DYSFUNCTION IN RHEUMATOID ARTHRITIS, SANTO DOMINGO, DOMINICAN REPUBLIC
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R. A. Alvarez Santana, D. Garcia, J. Santana Peralta, A. Cornelio, T. Polanco Mora, L. Concepción Sanchez, I. Paulino, I. Mercedes, E. Rodriguez Bautista, T. Valdez, A. Feriz, and R. Muñoz Louis
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Rheumatology ,Immunology ,Immunology and Allergy ,General Biochemistry, Genetics and Molecular Biology - Abstract
BackgroundRheumatoid arthritis (RA) is an inflammatory, autoimmune systemic disease that affects the synovial membrane of small joints.1 Kamissoko et al found the frequency of sexual dysfunction in RA to be 69.2%.2 Pain is considered to have a fundamental role associated with the decrease in the frequency of sexual intercourse.3 The CSFQ-14 (Changes in Sexual Functioning Questionnaire), evaluates the changes in sexual functioning due to a disease and/or treatment in 5 domains with a score range of 14-70; cut-off point indicating sexual dysfunction 4ObjectivesTo evaluate the frequency and degree of sexual dysfunction in patients with rheumatoid arthritis.MethodsProspective, observational, cross-sectional study of a cohort of patients of the Rheumatology Service at Hospital Docente Padre Billini. Patients were interviewed in July 2021. Inclusion criteria: > 18 years, diagnosis of RA according to the ACR/EULAR 2010 classification criteria, at least 1 sexual intercourse. Exclusion criteria: previous diagnosis of another autoimmune disease, depression, diabetes, treatment with antidepressants, antiepileptics, narcotics. Scales measured: CSFQ-14, DAS28. Statistical analysis was performed with the Pearson correlation (rp) with p>0.05. Data were analyzed in IBM-SPSS v23.ResultsOf the RA cohort, 483 met inclusion criteria. 93.4% (451) female, mean age 58±12.6 years, mean duration of diagnosis 8 years, married 53.8% (260), single 27.7% (134), widowed 16.6% (80), hypertension 73.9% (357), dyslipidemia 21.5% (104), obesity 18.0% (87), smoking 9.9% (48). Frequency of sexual dysfunction 61.3% (296). Sexual dysfunction in women 93.9% (278) and men 6.1% (18). Global domains: desire/interest 55.7% (165), desire/frequency 56.4% (167), pleasure 58.1% (172), arousal/excitement 67.2% (199), orgasm/completion 50.0% (148). Female: desire/interest 94.5% (156), desire/frequency 93.4% (156), pleasure 93.6% (161), arousal/excitement 93.0% (185), orgasm/completion 93.9% (139). Male: desire/interest 5.5% (9), desire/frequency 11.6% (11), pleasure 6.4% (11), arousal/excitement 7.0% (14), orgasm/completion 6.1% (9). Desire/interest dysfunction: DAS28 remission or low activity 28.5% (47), moderate 53.3% (88), high activity 4.8% (8). Desire/frequency: DAS28 remission or low activity 35.3% (59), moderate 47.3% (79), high activity 3.6% (6). Pleasure: DAS28 remission or low activity 30.2% (52), moderate 50.0% (86), high activity 2.9% (5). Arousal/excitement: DAS28 remission or low activity 25.1% (50), moderate 55.8% (111), high activity 6.0% (12). Orgasm/completion: DAS28 remission or low activity 43.2% (64), moderate 38.5% (57), high activity 6.1% (9).ConclusionThe study showed a high frequency of sexual dysfunction, observing greater dysfunction in females. In the population, the most affected global domain was arousal/excitement, and it was the most frequent in female and male.References[1]Gomero García, D., 2018. Artritis reumatoide, epidemiología, fisiopatología, criterios diagnósticos y tratamiento. Revista de Medicina e Investigación Universidad Autónoma del Estado de México, 6(2).[2]Kamissoko, A.B., Edikou, T.N.R., Barry, A., Sanda, M., Fofana, K., Irie, L.N.E., Diallo, M.L. and Oniankitan, O. (2021) Sexuality of Women with Rheumatoid Arthritis in a West African Hospital. Open Journal of Rheumatology and Autoimmune Diseases, 11, 152-159[3]Bay, L. et al. Sexual Health and Dysfunction in Patients With Rheumatoid Arthritis: A Cross-sectional Single-Center Study. Sexual Medicine, 8(4), pp.615-630.[4]Clayton AH, McGarvey EL, Clavet GJ. The Changes in Sexual Functioning Questionnaire (CSFQ): development, reliability, and validity. Psychopharmacol Bull. 1997;33(4):731-45. PMID: 9493486.Disclosure of InterestsNone declared
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- 2022
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26. AB0684 Fatigue Assessment in Systemic Sclerosis, Santo Domingo, Dominican Republic
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J. Santana Peralta, A. Cornelio, D. Garcia, R. A. Alvarez Santana, T. Polanco Mora, L. Concepción Sanchez, I. Paulino, I. Mercedes, E. Rodriguez Bautista, T. Valdez Lorie, A. Feriz, and R. Muñoz Louis
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Rheumatology ,Immunology ,Immunology and Allergy ,General Biochemistry, Genetics and Molecular Biology - Abstract
BackgroundSystemic sclerosis (SSc) is a systemic autoimmune disease.1 Fatigue has been reported in 75% of SSc patients, and is the most problematic symptom due to impact on quality of life. Despite its high prevalence, origin is unknown.2 Some studies associate it with the degree of disease activity and decreased quality of life. Fatigue is defined as a feeling of exhaustion, also as a reduction in physical and mental capacity,3 scales such as FACIT-F (Functional Assessment of Chronic Illness Therapy-Fatigue) are used, which evaluates the last 7 days, with a score of 0-52. For the severity analysis, 4 grades are used: no or mild fatigue (40-52), moderate (27-39), severe (14-26) and extreme (0-13).4,5ObjectivesTo evaluate the frequency and degree of fatigue in systemic sclerosis.MethodsProspective, longitudinal, observational study of the cohort of patients of the Rheumatology service of the Hospital Docente Padre Billini. Patients were interviewed in November 2021. Inclusion criteria: ≥18 years, diagnosis of SSc according ACR/EULAR 2013 classification criteria. Exclusion criteria: previous diagnosis of fibromyalgia, depression or anxiety, treatment with antidepressants, antihistamines, beta-blockers. Measurement of FACIT-F, HAQ-DI, mRSS scales. Statistical analysis was performed with the Pearson correlation (rp) with p=>0.05. The data was analyzed by SPSS V23.Results54 met inclusion criteria. 100% female, mean age 53.3±15.1 years, mean disease duration 11.3 years, SScd 75.9% (41), SScl 24.1% (13), interstitial pneumonia 33.3% (18), gastrointestinal reflux disease 27.8% (15), HAP 20.37% (11). Frequency of fatigue 100% (54): moderate FACIT-F: 29.6% (16), severe FACIT-F 38.8% (21), extreme 31.5% (17). Correlation FACIT-F with mRSS and HAQ-DI: Moderate FACIT-F: mRSS mild 43.8% (7), moderate 12.5% (2), severe 18.8% (3), terminal 25% (4), HAQ-DI mild 25% (4), moderate 37.5% (6), severe 18.8% (3). Severe FACIT-F: mRSS normal 4.8% (1), mild 19% (4), moderate 91% (4), severe 33.3 % (7), terminal 23.8% (5), HAQ-DI mild 4.8% (1), moderate 19% (4), severe 47.6% (10). FACIT-F extreme: mRSS mild 7.61% (3), moderate 29.4% (5), severe 35.3% (6), terminal 17.6% (3), HAQ-DI moderate 11.8% (2), severe 52.9% (9). rp=. 246 p>0.05ConclusionThe study demonstrated a high frequency of fatigue. The most frequent degree was severe. A statistically significant linear association was observed between skin involvement and the degree of functional limitation.References[1]Basta F, Afeltra A, Margiotta DPE. Fatigue in systemic sclerosis: a systematic review. Clin Exp Rheumatol. 2018.[2]Chernis, J., Buni, M., Kazzaz, S., Ying, J., Lyons, M., Assassi, S. and Mayes, M., 2021. Predictors of Perceived Functional Status in Early Systemic Sclerosis: A Prospective Longitudinal Study of the GENISOS Cohort. Arthritis Care & Research.[3]Stamm, T., Mosor, E., Omara, M., Ritschl, V., & Murphy, S. L. (2020). How can fatigue be addressed in individuals with systemic sclerosis? The Lancet Rheumatology, 2(3), e128-e129.[4]Nakayama, A., Tunnicliffe, D., Thakkar, V., Singh-Grewal, D., O’Neill, S., Craig, J. and Tong, A., 2016. Patients’ Perspectives and Experiences Living with Systemic Sclerosis: A Systematic Review and Thematic Synthesis of Qualitative Studies. The Journal of Rheumatology, 43(7), pp.1363-1375.[5]Acaster, S., Dickerhoof, R., DeBusk, K., Bernard, K., Strauss, W. and Allen, L., 2015. Qualitative and quantitative validation of the FACIT-fatigue scale in iron deficiency anemia. Health and Quality of Life Outcomes, 13(1).Disclosure of InterestsNone declared
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- 2022
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27. Seasonal and annual variability in the phytoplankton community of the Raunefjord, west coast of Norway from 2001–2006
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Jorun K. Egge, Gunnar Bratbak, Svein Rune Erga, Aud Larsen, Einar Bye-Ingebrigtsen, Dale Evens, and A. I. Paulino
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0106 biological sciences ,010504 meteorology & atmospheric sciences ,Ecology ,010604 marine biology & hydrobiology ,fungi ,Ecological succession ,Aquatic Science ,Oceanography ,01 natural sciences ,Food web ,Geography ,Community composition ,13. Climate action ,Phytoplankton ,sense organs ,14. Life underwater ,West coast ,Ecology, Evolution, Behavior and Systematics ,0105 earth and related environmental sciences - Abstract
Changes in phytoplankton community composition potentially affect the entire marine food web. Because of seasonal cycles and inter-annual variations in species composition, long-term monitoring, co...
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- 2018
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28. Chikungunya infection in the general population and in patients with rheumatoid arthritis on biological therapy
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R. Alba-Fériz, V. Rosario, J. Medrano, T. Valdez, I. Paulino, J. Paula, S. Adames, and R. Muñoz-Louis
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Male ,medicine.medical_specialty ,Population ,Arthritis ,medicine.disease_cause ,Disease Outbreaks ,Arthritis, Rheumatoid ,Rheumatology ,Internal medicine ,medicine ,Humans ,Musculoskeletal Diseases ,Chikungunya ,education ,education.field_of_study ,business.industry ,Anti-Inflammatory Agents, Non-Steroidal ,Dominican Republic ,General Medicine ,Middle Aged ,medicine.disease ,Arthralgia ,Rash ,Surgery ,Biological Therapy ,Methotrexate ,Antirheumatic Agents ,Rheumatoid arthritis ,Chikungunya Fever ,Female ,Steroids ,medicine.symptom ,Tendinopathy ,business ,medicine.drug - Abstract
Chikungunya infection is a febrile illness, which currently is afflicting the Caribbean islands including the Dominican Republic. We would like to report our experience with Chikungunya-related musculoskeletal manifestations in our arthritis clinics in the Dominican Republic. A total of 514 patients presented for the first time to our arthritis clinic exhibiting musculoskeletal manifestations, 473/514 (92 %) exhibiting symmetric polyarthralgias, 344/514 (67 %) arthritis, and 385 (75 %) skin rash. The great majority 457.46 (89 %) exhibited very good clinical response to nonsteroidal anti-inflammatory drugs (NSAIDs), 370 (72 %) require low-dose steroids, and only 5 patients (0.97 %) required methotrexate therapy. In addition, of a total of 328 patients with rheumatoid arthritis on biological treatment, 53 exhibited Chikungunya-related musculoskeletal manifestations; 51/53 (96.2 %) exhibited symmetric polyarthralgias, 25/53 (47.1 %) arthritis, and 13/53 (24.5 %) tendinopathy. Of most patients, 51/53 responded to NSAIDs, of which, 23 patients only responded partially, and in total 25 (47.1 %) required low-dose steroids. Disease-modifying antirheumatic drug (DMARD) therapy including biologics remained unchanged in this population.
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- 2015
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29. Dynamics of dimethylsulphoniopropionate and dimethylsulphide under different CO2 concentrations during a mesocosm experiment
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A. I. Paulino, Ulf Riebesell, Suzanne M. Turner, Michael Meyerhöfer, Peter S. Liss, Meike Vogt, Michael Steinke, and C. LeQuéré
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0106 biological sciences ,010504 meteorology & atmospheric sciences ,biology ,010604 marine biology & hydrobiology ,fungi ,Community structure ,biology.organism_classification ,Dimethylsulfoniopropionate ,01 natural sciences ,Mesocosm ,chemistry.chemical_compound ,Algae ,chemistry ,Abundance (ecology) ,Environmental chemistry ,Botany ,Phytoplankton ,Marine ecosystem ,Seawater ,14. Life underwater ,Ecology, Evolution, Behavior and Systematics ,0105 earth and related environmental sciences ,Earth-Surface Processes - Abstract
The potential impact of seawater acidification on the concentrations of dimethylsulfide (DMS) and dimethylsulfoniopropionate (DMSP), and the activity of the enzyme DMSP-lyase was investigated during a pelagic ecosystem CO2 enrichment experiment (PeECE III) in spring 2005. Natural phytoplankton blooms were studied for 24 days under present, double and triple partial pressures of CO2 (pCO2; pH=8.3, 8.0, 7.8) in triplicate 25 m3 enclosures. The results indicate similar DMSP concentrations and DMSP-lyase activity (DLA) patterns for all treatments. Hence, DMSP and DLA do not seem to have been affected by the CO2 treatment. In contrast, DMS concentrations showed small but statistically significant differences in the temporal development of the low versus the high CO2 treatments. The low pCO2 enclosures had higher DMS concentrations during the first 10 days, after which the levels decreased earlier and more rapidly than in the other treatments. Integrated over the whole study period, DMS concentrations were not significantly different from those of the double and triple pCO2 treatments. Pigment and flow-cytometric data indicate that phytoplanktonic populations were generally similar between the treatments, suggesting a certain resilience of the marine ecosystem under study to the induced pH changes, which is reflected in DMSP and DLA. However, there were significant differences in bacterial community structure and the abundance of one group of viruses infecting nanoeukaryotic algae. The amount of DMS accumulated per total DMSP or chlorophyll-a differed significantly between the present and future scenarios, suggesting that the pathways for DMS production or bacterial DMS consumption were affected by seawater pH. A comparison with previous work (PeECE II) suggests that DMS concentrations do not respond consistently to pelagic ecosystem CO2 enrichment experiments.
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- 2008
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30. Population dynamics and diversity of phytoplankton, bacteria and viruses in a seawater enclosure
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E.J. Van Hannen, Jorun K. Egge, Tonje Castberg, Runar Thyrhaug, Corina P. D. Brussaard, Gunnar Bratbak, A. I. Paulino, Aud Larsen, Ruth-Anne Sandaa, Mikal Heldal, and Centre for Limnology (NIOO / CL)
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education.field_of_study ,Ecology ,Population ,fungi ,Species diversity ,Aquatic Science ,Biology ,Plankton ,biology.organism_classification ,Microbial population biology ,Algae ,Phytoplankton ,Flagellate ,education ,Ecology, Evolution, Behavior and Systematics ,Temperature gradient gel electrophoresis - Abstract
We now know that the abundance of free viruses in most marine environments is high. There is still, however, a lack of understanding of their occurrence and distribution and of in situ relationships between viral and host communities in natural environments. This may be partly due to methodological limitations. Our main aim was therefore to perform a case study in which a variety of methods were applied in order to give an improved, high-resolution description of the microbial communities in a natural environment, In order to do this we combined light microscopy (LM), transmission electron microscopy (TEM), flow cytometry (FCM), PCR denaturing gradient gel electrophoresis (PCR-DGGE) and pulsed-field gel electrophoresis (PFGE) and studied the diversity and succession of algae, bacteria and viruses in a nutrient enriched seawater enclosure. In the enclosure we experienced a situation where the development of the dominating algal population, which consisted of several flagellate species, was followed by proliferation of several different size-classes of viruses. The total bacterial number decreased markedly during the flagellate bloom but the community composition was maintained and the diversity remained high. Our results indicate a close linkage between various algal, bacterial and viral populations and show that virioplankton do not necessarily terminate algal and bacterial blooms but that they keep the host populations at non-blooming levels. [KEYWORDS: bacteria, DGGE, diversity, flow cytometry, light microscopy, PFGE, phytoplankton, virus]
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- 2001
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31. Elemental stoichiometry of marineparticulate matter measured by wavelengthdispersive X-ray fluorescence (WDXRF)spectroscopy
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Jorun K. Egge, Svein Norland, A. I. Paulino, and Mikal Heldal
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0106 biological sciences ,Detection limit ,Materials science ,010504 meteorology & atmospheric sciences ,010604 marine biology & hydrobiology ,Analytical chemistry ,chemistry.chemical_element ,X-ray fluorescence ,Mineralogy ,Aquatic Science ,01 natural sciences ,Nitrogen ,chemistry ,13. Climate action ,Particle ,Seawater ,Absorption (electromagnetic radiation) ,Spectroscopy ,Carbon ,0105 earth and related environmental sciences - Abstract
This paper describes the development of a method for quantitative measurement of the elemental composition of particulate matter (PM) in seawater. This method is based on use of wavelength dispersive X-ray fluorescence (WDXRF) analysing PM harvested on various filter types. As the amount of material is less than a monolayer of cells on the filters we reduced the need for absorption correction. Given the appropriate combination of filters and elements the detection limits are low: 90–750 µgC,23–116 µgN and7–30 µgP, depending on the filters applied. Calibration constants for the elements included in this study were obtained from analysis of known quantities of chemical compounds on filters or silver plates. For carbon and nitrogen we also used comparative measurements ofSynechococcussp. cultures by CHN analyser and WDXRF. We harvested PM from 150 ml to 2000 ml on each filter in three replicates, obtaining less than 5% analytical variability between the replicates. One of the challenges using WDXRF as proposed here is the absorption of X-ray signals by the filter and variability of cell/particle sizes, and, consequentlyly, the variability of harvested PM on various filters. We find that an anodisc filter is best suited for C and N, while polycarbonate filters are best for heavier elements. Here we present analytical details and some data from field experiments related to C, N, P, Si, Ca and Fe in particles from seawater.
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- 2013
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32. Cálculo de parâmetros de ondas de gravidade de grande escala através de imagens de aeroluminescência
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I. Paulino, H. Takahashi, D. Gobbi, C. M. Wrasse, A. F. Medeiros, and R. A. Buriti
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- 2009
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33. Unexpected consequences of increasing CO2and ocean acidity on marine production of DMS and CH2ClI: Potential climate impacts
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Runar Thyrhaug, Karl B. Haase, Michael Meyerhöfer, A. I. Paulino, Aud Larsen, Kai G. Schulz, Oliver W. Wingenter, Max Zeigler, Barkley C. Sive, F. Sherwood Rowland, Ulf Riebesell, and Donald R. Blake
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010504 meteorology & atmospheric sciences ,Microorganism ,Ocean acidification ,010501 environmental sciences ,Plankton ,01 natural sciences ,Mesocosm ,chemistry.chemical_compound ,Geophysics ,Oceanography ,chemistry ,13. Climate action ,Environmental chemistry ,Phytoplankton ,Mixing ratio ,General Earth and Planetary Sciences ,Environmental science ,Dimethyl sulfide ,Ecosystem ,14. Life underwater ,0105 earth and related environmental sciences - Abstract
Increasing atmospheric mixing ratios of CO2 have already lowered surface ocean pH by 0.1 units compared to preindustrial values and pH is expected to decrease an additional 0.3 units by the end of this century. Pronounced physiological changes in some phytoplankton have been observed during previous CO2 perturbation experiments. Marine microorganisms are known to consume and produce climate-relevant organic gases. Concentrations of (CH3)2S (DMS) and CH2ClI were quantified during the Third Pelagic Ecosystem CO2 Enrichment Study. Positive feedbacks were observed between control mesocosms and those simulating future CO2. Dimethyl sulfide was 26% (±10%) greater than the controls in the 2x ambient CO2 treatments, and 18% (±10%) higher in the 3xCO2 mesocosms. For CH2ClI the 2xCO2 treatments were 46% (±4%) greater than the controls and the 3xCO2 mesocosms were 131% (±11%) higher. These processes may help contribute to the homeostasis of the planet.
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- 2007
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34. AB0459 Transaminases Alterations Caused by Tocilizumab, in the Treatment of Patients with Rheumatoid Arthritis in Santo Domingo, Dominican Republic
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R. Alba Fériz, J. Medrano Sanchez, I. Paulino Izquierdo, T. Valdez Lorie, R. Muñoz Louis, J. Paula Mateo, M.S. Adames, and V. Rosario
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Autoimmune disease ,medicine.medical_specialty ,education.field_of_study ,Every Three Months ,business.industry ,Immunology ,Population ,medicine.disease ,General Biochemistry, Genetics and Molecular Biology ,Surgery ,Pathogenesis ,chemistry.chemical_compound ,Tocilizumab ,Rheumatology ,chemistry ,Internal medicine ,Rheumatoid arthritis ,medicine ,Immunology and Allergy ,Elevated transaminases ,Prospective cohort study ,business ,education - Abstract
Background Rheumatoid Arthritis (RA) is a systemic, inflammatory, chronic, autoimmune disease that predominantly affects the joints.1 In the last decade new drugs have been introduced, including biological drugs that act on different targets implicated in the pathogenesis of the disease.2 Within this group of drugs is tocilizumab (TCZ), a humanized monoclonal antibody anti IL-6r, key cytokine involved in the pathogenesis of RA and the disease activity.3 TCZ use has been associated with abnormalities in transaminases (AST, ALT).2 Objectives To determine the frequency of transaminases abnormalities in patients with RA treated with TCZ in Santo Domingo, Dominican Republic. Methods We performed a longitudinal, observational, prospective study. The records of patients diagnosed with RA who fulfilled the 1987 ACR criteria and ACR/EULAR 2010, which use biological therapy with TCZ in HDPB and HFMP in July 2013 until August 2014 were reviewed. All patients signed informed consent. We reviewed a total of 56 records from which we selected patients who had at least 2 follow-up visits after the start of treatment (40 patients) taking into account the transaminases baseline values to compare changes. Visits were conducted every three months, mild and moderate levels were considered between (>1xUI/L, >2xUI/L) and severe (>3xUI/L) over the normal value. The patients whose records were found incomplete during the first 3 visits were excluded. The frequency of continuous variables was analyzed using the SPSS statistical program (V20.x86). Results Of 40 patients who met the inclusion criteria, 45% (18) elevated transaminases levels. For AST elevations 33.3% (6) elevated from mild to moderate, only 5.6% (1) severely and 61.1% (11) did not alter the levels. As for ALT, 50% (9) presented increased mild to moderate, 5.6% (1) course with severe elevation and the remaining 44.4% (8) did not alter the normal parameters. On the third visit 50% (9) presented elevated AST from mild to moderate, not severe elevations were reported and 50% (9) remained within normal parameters. Elevations of ALT were higher during the third visit in 72.2% (13) of mild to moderate, only 5.6% (1) course with severe elevation and 22.2% (4) was found within normal values. Of the 18 patients who were enrolled with alterations, 83.33% (15) were using simultaneously therapy with sDMARD. Conclusions The results of monitoring of a population of Dominican Republic showed that treatment with TCZ was associated with increased levels of transaminases. References Ann Rheum Dis 2014; 73:1607-1615. Ann Rheum Dis 2010; 69:88-96. Reumatol Clin.2011, 6 (S3). S29-S32. Disclosure of Interest None declared
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- 2015
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35. Drug related problems identified by European community pharmacists in patients discharged from hospital
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Ema I, Paulino, Marcel L, Bouvy, Miguel A, Gastelurrutia, Mara, Guerreiro, and Henk, Buurma
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Male ,Drug-Related Side Effects and Adverse Reactions ,Patients ,Community Pharmacy Services ,Middle Aged ,Pharmacists ,Patient Discharge ,Europe ,Logistic Models ,Pharmaceutical Preparations ,Surveys and Questionnaires ,Humans ,Medication Errors ,Female ,Aged - Abstract
Drug related problems (DRPs) are perceived to occur frequently when patients are discharged from the hospital. Community pharmacists' interventions to detect, prevent and solve DRPs in this population are scarcely studied.To examine the nature and frequency of DRPs in community pharmacies among patients discharged from hospitals in several countries, and to examine several variables related to these drug related problems.The study was performed in 112 community pharmacies in Europe: Austria, Denmark, Germany, The Netherlands, Portugal and Spain. Community pharmacists asked patients with a prescription after discharge from hospital between February and April 2001 to participate in the study. A patient questionnaire was used to identify drug related problems. Pharmacists documented drug related problems, pharmacy interventions, type of prescriber and patient and pharmacy variables.435 patients were included in the study. Drug related problems were identified in 277 patients (63.7%). Uncertainty or lack of knowledge about the aim or function of the drug (133; 29.5%) and side effects (105; 23.3%) were the most common DRPs. Practical problems were reported 56 times (12.4%) by patients. Pharmacists revealed 108 problems (24.0%) concerning dosage, drug duplication, drug interactions and prescribing errors. Patients with more changes in their drug regimens (drugs being stopped, new drugs started or dosage modifications) and using more drugs were more likely to develop DRPs. Community pharmacists recorded 305 interventions in 205 patients with DRPs. Pharmacists intervened mostly by patient medication counselling (39.0%) and practical instruction to the patient (17.7%). In 26.2% the intervention was directed towards the prescriber. In 28 cases (9.2%) the pharmacists' intervention led to a change of the drug regimen.This study shows that a systematic intervention by community pharmacists in discharged patients, or their proxies, is able to reveal a high number of DRPs that might be relevant for patient health outcomes. There should be more initiatives to insure continuity of care, since DRPs after discharge from hospital seem to be very common.
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- 2005
36. Drug related problems identified by European community pharmacists in patients discharged from hospital.
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Ema I. Paulino, Marcel L. Bouvy, Miguel A. Gastelurrutia, Mara Guerreiro, and Henk Buurma
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HOSPITAL & community ,PATIENTS ,COMMUNITY health services ,COMMUNITY life - Abstract
Abstract Objective: To examine the nature and frequency of DRPs in community pharmacies among patients discharged from hospitals in several countries, and to examine several variables related to these drug related problems. [ABSTRACT FROM AUTHOR]
- Published
- 2004
37. Effects of increased atmospheric CO2 on small and intermediate sized osmotrophs during a nutrient induced phytoplankton bloom
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A. Larsen, J. K. Egge, and A. I. Paulino
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Ecology ,QH540-549.5 ,Life ,QH501-531 ,Geology ,QE1-996.5 - Abstract
We report the transient population dynamic response of the osmotrophic community initiated by a nutrient pulse in mesocosms exposed to different pCO2 levels. Differences in phytoplankton and heterotrophic bacteria abundances associated with the CO2 treatment are also described. Coastal seawater was enclosed in floating mesocosms (27 m3) and nutrients were supplied initially in order to stimulate growth of microbial organisms, including the coccolitophorid Emiliania huxleyi. The mesocosms were modified to achieve 350 μatm (1×CO2), 700 μatm (2×CO2) and 1050 μatm (3×CO2) CO2 pressure. The temporal dynamics was related to nutrient conditions in the enclosures. Numerically small osmotrophs (picoeukaryotes and Synechoccocus sp.) dominated initially and towards the end of the experiment, whereas intermediate sized osmotrophs bloomed as the initial bloom of small sized osmotrophs ceased. Maximum concentrations of E. huxleyi were approximately 4.6×103 cells ml−1 whereas other intermediate sized osmotrophs reached approximately twice as high concentrations. The osmotrophic succession pattern did not change, and neither were we able to detect differences with regard to presence or absence of specific osmotrophic taxa as a consequence of altered pCO2. Towards the end of the experiment we did, however, record significantly higher picoeukaryotic- and lower Synechococcus-abundances in the higher CO2 treatments. Slightly increased cell concentrations of E. huxleyi and other nanoeukaryotes were also recorded at elevated pCO2 on certain days.
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- 2008
38. Air-sea fluxes of methanol, acetone, acetaldehyde, isoprene and DMS from a Norwegian fjord following a phytoplankton bloom in a mesocosm experiment
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V. Sinha, J. Williams, M. Meyerhöfer, U. Riebesell, A. I. Paulino, and A. Larsen
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Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
The ocean's influence on volatile organic compounds (VOCs) in the atmosphere is poorly understood. This work characterises the oceanic emission and/or uptake of methanol, acetone, acetaldehyde, isoprene and dimethyl sulphide (DMS) as a function of photosynthetically active radiation (PAR) and a suite of biological parameters. The measurements were taken following a phytoplankton bloom, in May/June 2005 with a proton transfer reaction mass spectrometer (PTR-MS), from mesocosm enclosures anchored in the Raunefjord, Southern Norway. The net flux of methanol was always into the ocean, and was stronger at night. Isoprene and acetaldehyde were emitted from the ocean, correlating with light (ravcorr, isoprene=0.49; ravcorr, acetaldehyde=0.70) and phytoplankton abundance. DMS was also emitted to the air but did not correlate significantly with light (ravcorr, dms=0.01). Under conditions of high biological activity and a PAR of ~450 μmol photons m−2 s−1, acetone was emitted from the ocean, otherwise it was uptaken. The inter-VOC correlations were highest between the day time emission fluxes of acetone and acetaldehyde (rav=0.96), acetaldehyde and isoprene (rav=0.88) and acetone and isoprene (rav=0.85). The mean fluxes for methanol, acetone, acetaldehyde, isoprene and DMS were −0.26 ng m−2 s−1, 0.21 ng m−2 s−1, 0.23 ng m−2 s−1, 0.12 ng m−2 s−1 and 0.3 ng m−2 s−1, respectively. This work shows that compound specific PAR and biological dependency should be used for estimating the influence of the global ocean on atmospheric VOC budgets.
- Published
- 2007
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