1
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Sánchez‐Lavega A, del Rio‐Gaztelurrutia T, Hueso R, Juárez MDLT, Martínez GM, Harri A, Genzer M, Hieta M, Polkko J, Rodríguez‐Manfredi JA, Lemmon MT, Pla‐García J, Toledo D, Vicente‐Retortillo A, Viúdez‐Moreiras D, Munguira A, Tamppari LK, Newman C, Gómez‐Elvira J, Guzewich S, Bertrand T, Apéstigue V, Arruego I, Wolff M, Banfield D, Jaakonaho I, Mäkinen T. Mars 2020 Perseverance Rover Studies of the Martian Atmosphere Over Jezero From Pressure Measurements. J Geophys Res Planets 2023; 128:e2022JE007480. [PMID: 37034458 PMCID: PMC10078360 DOI: 10.1029/2022je007480] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 10/05/2022] [Accepted: 10/24/2022] [Indexed: 06/16/2023]
Abstract
The pressure sensors on Mars rover Perseverance measure the pressure field in the Jezero crater on regular hourly basis starting in sol 15 after landing. The present study extends up to sol 460 encompassing the range of solar longitudes from L s ∼ 13°-241° (Martian Year (MY) 36). The data show the changing daily pressure cycle, the sol-to-sol seasonal evolution of the mean pressure field driven by the CO2 sublimation and deposition cycle at the poles, the characterization of up to six components of the atmospheric tides and their relationship to dust content in the atmosphere. They also show the presence of wave disturbances with periods 2-5 sols, exploring their baroclinic nature, short period oscillations (mainly at night-time) in the range 8-24 min that we interpret as internal gravity waves, transient pressure drops with duration ∼1-150 s produced by vortices, and rapid turbulent fluctuations. We also analyze the effects on pressure measurements produced by a regional dust storm over Jezero at L s ∼ 155°.
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Affiliation(s)
| | | | | | | | | | - A.‐M. Harri
- Finnish Meteorological InstituteHelsinkiFinland
| | - M. Genzer
- Finnish Meteorological InstituteHelsinkiFinland
| | - M. Hieta
- Finnish Meteorological InstituteHelsinkiFinland
| | - J. Polkko
- Finnish Meteorological InstituteHelsinkiFinland
| | | | | | | | - D. Toledo
- Centro de Astrobiología (INTA‐CSIC)MadridSpain
| | | | | | | | - L. K. Tamppari
- Jet Propulsion Laboratory/California Institute of TechnologyPasadenaCAUSA
| | | | | | - S. Guzewich
- NASA Goddard Space Flight CenterGreenbeltMDUSA
| | | | - V. Apéstigue
- Instituto Nacional de Técnica AeroespacialINTAMadridSpain
| | - I. Arruego
- Instituto Nacional de Técnica AeroespacialINTAMadridSpain
| | - M. Wolff
- Space Science InstituteBrookfieldWIUSA
| | | | | | - T. Mäkinen
- Finnish Meteorological InstituteHelsinkiFinland
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2
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Murdoch N, Stott AE, Gillier M, Hueso R, Lemmon M, Martinez G, Apéstigue V, Toledo D, Lorenz RD, Chide B, Munguira A, Sánchez-Lavega A, Vicente-Retortillo A, Newman CE, Maurice S, de la Torre Juárez M, Bertrand T, Banfield D, Navarro S, Marin M, Torres J, Gomez-Elvira J, Jacob X, Cadu A, Sournac A, Rodriguez-Manfredi JA, Wiens RC, Mimoun D. The sound of a Martian dust devil. Nat Commun 2022; 13:7505. [PMID: 36513637 PMCID: PMC9747922 DOI: 10.1038/s41467-022-35100-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 11/18/2022] [Indexed: 12/15/2022] Open
Abstract
Dust devils (convective vortices loaded with dust) are common at the surface of Mars, particularly at Jezero crater, the landing site of the Perseverance rover. They are indicators of atmospheric turbulence and are an important lifting mechanism for the Martian dust cycle. Improving our understanding of dust lifting and atmospheric transport is key for accurate simulation of the dust cycle and for the prediction of dust storms, in addition to being important for future space exploration as grain impacts are implicated in the degradation of hardware on the surface of Mars. Here we describe the sound of a Martian dust devil as recorded by the SuperCam instrument on the Perseverance rover. The dust devil encounter was also simultaneously imaged by the Perseverance rover's Navigation Camera and observed by several sensors in the Mars Environmental Dynamics Analyzer instrument. Combining these unique multi-sensorial data with modelling, we show that the dust devil was around 25 m large, at least 118 m tall, and passed directly over the rover travelling at approximately 5 m s-1. Acoustic signals of grain impacts recorded during the vortex encounter provide quantitative information about the number density of particles in the vortex. The sound of a Martian dust devil was inaccessible until SuperCam microphone recordings. This chance dust devil encounter demonstrates the potential of acoustic data for resolving the rapid wind structure of the Martian atmosphere and for directly quantifying wind-blown grain fluxes on Mars.
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Affiliation(s)
- N. Murdoch
- grid.508721.9Institut Supérieur de l’Aéronautique et de l’Espace (ISAE-SUPAERO), Université de Toulouse, Toulouse, France
| | - A. E. Stott
- grid.508721.9Institut Supérieur de l’Aéronautique et de l’Espace (ISAE-SUPAERO), Université de Toulouse, Toulouse, France
| | - M. Gillier
- grid.508721.9Institut Supérieur de l’Aéronautique et de l’Espace (ISAE-SUPAERO), Université de Toulouse, Toulouse, France
| | - R. Hueso
- grid.11480.3c0000000121671098Física Aplicada, Escuela de Ingeniería de Bilbao, Universidad del País Vasco (UPV/EHU), Bilbao, Spain
| | - M. Lemmon
- grid.296797.40000 0004 6023 5450Space Science Institute, Boulder, CO 80301 USA
| | - G. Martinez
- grid.410493.b0000 0000 8634 1877Lunar and Planetary Institute, Universities Space Research Association, Houston, TX USA ,grid.214458.e0000000086837370Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI USA
| | - V. Apéstigue
- grid.15312.340000 0004 1794 1528Instituto Nacional de Técnica Aeroespacial, Madrid, Spain
| | - D. Toledo
- grid.15312.340000 0004 1794 1528Instituto Nacional de Técnica Aeroespacial, Madrid, Spain
| | - R. D. Lorenz
- grid.474430.00000 0004 0630 1170Space Exploration Sector, Johns Hopkins Applied Physics Laboratory, Laurel, MD USA
| | - B. Chide
- grid.148313.c0000 0004 0428 3079Space and Planetary Exploration Team, Los Alamos National Laboratory, Los Alamos, NM USA
| | - A. Munguira
- grid.11480.3c0000000121671098Física Aplicada, Escuela de Ingeniería de Bilbao, Universidad del País Vasco (UPV/EHU), Bilbao, Spain
| | - A. Sánchez-Lavega
- grid.11480.3c0000000121671098Física Aplicada, Escuela de Ingeniería de Bilbao, Universidad del País Vasco (UPV/EHU), Bilbao, Spain
| | | | | | - S. Maurice
- grid.15781.3a0000 0001 0723 035XInstitut de Recherche en Astrophysique et Planétologie, Université de Toulouse 3 Paul Sabatier, CNRS, CNES, Toulouse, France
| | - M. de la Torre Juárez
- grid.20861.3d0000000107068890Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA USA
| | - T. Bertrand
- grid.482824.00000 0004 0370 8434Laboratoire d’Etudes Spatiales et d’Instrumentation en Astrophysique (LESIA), Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Univ. Paris Diderot, Sorbonne Paris Cité, 5 place Jules Janssen, 92195 Meudon, France
| | - D. Banfield
- grid.5386.8000000041936877XCornell University, Ithaca, NY USA ,grid.419075.e0000 0001 1955 7990NASA AMES Research Center, Moffett Field, CA USA
| | - S. Navarro
- grid.462011.00000 0001 2199 0769Centro de Astrobiología (INTA-CSIC), Madrid, Spain
| | - M. Marin
- grid.462011.00000 0001 2199 0769Centro de Astrobiología (INTA-CSIC), Madrid, Spain
| | - J. Torres
- grid.462011.00000 0001 2199 0769Centro de Astrobiología (INTA-CSIC), Madrid, Spain
| | - J. Gomez-Elvira
- grid.15312.340000 0004 1794 1528Instituto Nacional de Técnica Aeroespacial, Madrid, Spain
| | - X. Jacob
- grid.15781.3a0000 0001 0723 035XInstitut de Mécanique des Fluides, Université de Toulouse III Paul Sabatier, INP, CNRS, Toulouse, France
| | - A. Cadu
- grid.508721.9Institut Supérieur de l’Aéronautique et de l’Espace (ISAE-SUPAERO), Université de Toulouse, Toulouse, France
| | - A. Sournac
- grid.508721.9Institut Supérieur de l’Aéronautique et de l’Espace (ISAE-SUPAERO), Université de Toulouse, Toulouse, France
| | | | - R. C. Wiens
- grid.169077.e0000 0004 1937 2197Earth, Atmospheric, and Planetary Sciences, Purdue University, West Lafayette, IN USA
| | - D. Mimoun
- grid.508721.9Institut Supérieur de l’Aéronautique et de l’Espace (ISAE-SUPAERO), Université de Toulouse, Toulouse, France
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3
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Viúdez‐Moreiras D, de la Torre M, Gómez‐Elvira J, Lorenz RD, Apéstigue V, Guzewich S, Mischna M, Sullivan R, Herkenhoff K, Toledo D, Lemmon M, Smith M, Newman CE, Sánchez‐Lavega A, Rodríguez‐Manfredi JA, Richardson M, Hueso R, Harri AM, Tamppari L, Arruego I, Bell J. Winds at the Mars 2020 Landing Site. 2. Wind Variability and Turbulence. J Geophys Res Planets 2022; 127:e2022JE007523. [PMID: 37033152 PMCID: PMC10078282 DOI: 10.1029/2022je007523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Revised: 11/18/2022] [Accepted: 11/29/2022] [Indexed: 06/19/2023]
Abstract
Wind speeds measured by the Mars 2020 Perseverance rover in Jezero crater were fitted as a Weibull distribution. InSight wind data acquired in Elysium Planitia were also used to contextualize observations. Jezero winds were found to be much calmer on average than in previous landing sites, despite the intense aeolian activity observed. However, a great influence of turbulence and wave activity was observed in the wind speed variations, thus driving the probability of reaching the highest wind speeds at Jezero, instead of sustained winds driven by local, regional, or large-scale circulation. The power spectral density of wind speed fluctuations follows a power-law, whose slope deviates depending on the time of day from that predicted considering homogeneous and isotropic turbulence. Daytime wave activity is related to convection cells and smaller eddies in the boundary layer, advected over the crater. The signature of convection cells was also found during dust storm conditions, when prevailing winds were consistent with a tidal drive. Nighttime fluctuations were also intense, suggesting strong mechanical turbulence. Convective vortices were usually involved in rapid wind fluctuations and extreme winds, with variations peaking at 9.2 times the background winds. Transient high wind events by vortex-passages, turbulence, and wave activity could be driving aeolian activity at Jezero. We report the detection of a strong dust cloud of 0.75-1.5 km in length passing over the rover. The observed aeolian activity had major implications for instrumentation, with the wind sensor suffering damage throughout the mission, probably due to flying debris advected by winds.
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Affiliation(s)
- D. Viúdez‐Moreiras
- Centro de Astrobiología (CAB, CSIC‐INTA) and National Institute for Aerospace Technology (INTA)MadridSpain
| | - M. de la Torre
- Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadenaCAUSA
| | - J. Gómez‐Elvira
- National Institute for Aerospace Technology (INTA)MadridSpain
| | | | - V. Apéstigue
- National Institute for Aerospace Technology (INTA)MadridSpain
| | - S. Guzewich
- NASA Goddard Spaceflight CenterGreenbeltMDUSA
| | - M. Mischna
- Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadenaCAUSA
| | | | | | - D. Toledo
- National Institute for Aerospace Technology (INTA)MadridSpain
| | - M. Lemmon
- Space Science InstituteCollege StationTXUSA
| | - M. Smith
- NASA Goddard Spaceflight CenterGreenbeltMDUSA
| | | | | | - J. A. Rodríguez‐Manfredi
- Centro de Astrobiología (CAB, CSIC‐INTA) and National Institute for Aerospace Technology (INTA)MadridSpain
| | | | - R. Hueso
- Universidad del País Vasco (UPV/EHU)BilbaoSpain
| | - A. M. Harri
- Finnish Meteorological InstituteHelsinkiFinland
| | - L. Tamppari
- Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadenaCAUSA
| | - I. Arruego
- National Institute for Aerospace Technology (INTA)MadridSpain
| | - J. Bell
- School of Earth and Space ExplorationArizona State UniversityTempeAZUSA
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4
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Lemmon MT, Smith MD, Viudez‐Moreiras D, de la Torre‐Juarez M, Vicente‐Retortillo A, Munguira A, Sanchez‐Lavega A, Hueso R, Martinez G, Chide B, Sullivan R, Toledo D, Tamppari L, Bertrand T, Bell JF, Newman C, Baker M, Banfield D, Rodriguez‐Manfredi JA, Maki JN, Apestigue V. Dust, Sand, and Winds Within an Active Martian Storm in Jezero Crater. Geophys Res Lett 2022; 49:e2022GL100126. [PMID: 36245893 PMCID: PMC9540647 DOI: 10.1029/2022gl100126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 08/19/2022] [Accepted: 08/22/2022] [Indexed: 06/16/2023]
Abstract
Rovers and landers on Mars have experienced local, regional, and planetary-scale dust storms. However, in situ documentation of active lifting within storms has remained elusive. Over 5-11 January 2022 (LS 153°-156°), a dust storm passed over the Perseverance rover site. Peak visible optical depth was ∼2, and visibility across the crater was briefly reduced. Pressure amplitudes and temperatures responded to the storm. Winds up to 20 m s-1 rotated around the site before the wind sensor was damaged. The rover imaged 21 dust-lifting events-gusts and dust devils-in one 25-min period, and at least three events mobilized sediment near the rover. Rover tracks and drill cuttings were extensively modified, and debris was moved onto the rover deck. Migration of small ripples was seen, but there was no large-scale change in undisturbed areas. This work presents an overview of observations and initial results from the study of the storm.
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Affiliation(s)
| | - M. D. Smith
- NASA Goddard Space Flight CenterGreenbeltMDUSA
| | | | | | | | - A. Munguira
- Física Aplicada, Escuela de Ingeniería de BilbaoUPV/EHUBilbaoSpain
| | | | - R. Hueso
- Física Aplicada, Escuela de Ingeniería de BilbaoUPV/EHUBilbaoSpain
| | | | - B. Chide
- Space and Planetary Exploration TeamLos Alamos National LaboratoryLos AlamosNMUSA
| | | | - D. Toledo
- Instituto Nacional de Técnica AerospacialMadridSpain
| | - L. Tamppari
- Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadenaCAUSA
| | | | | | | | - M. Baker
- Smithsonian National Air and Space MuseumWashingtonDCUSA
| | | | | | - J. N. Maki
- Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadenaCAUSA
| | - V. Apestigue
- Instituto Nacional de Técnica AerospacialMadridSpain
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5
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Lemmon MT, Toledo D, Apestigue V, Arruego I, Wolff MJ, Patel P, Guzewich S, Colaprete A, Vicente‐Retortillo Á, Tamppari L, Montmessin F, de la Torre Juarez M, Maki J, McConnochie T, Brown A, Bell JF. Hexagonal Prisms Form in Water-Ice Clouds on Mars, Producing Halo Displays Seen by Perseverance Rover. Geophys Res Lett 2022; 49:e2022GL099776. [PMID: 36245894 PMCID: PMC9539710 DOI: 10.1029/2022gl099776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 08/18/2022] [Accepted: 08/22/2022] [Indexed: 06/16/2023]
Abstract
Observations by several cameras on the Perseverance rover showed a 22° scattering halo around the Sun over several hours during northern midsummer (solar longitude 142°). Such a halo has not previously been seen beyond Earth. The halo occurred during the aphelion cloud belt season and the cloudiest time yet observed from the Perseverance site. The halo required crystalline water-ice cloud particles in the form of hexagonal columns large enough for refraction to be significant, at least 11 μm in diameter and length. From a possible 40-50 km altitude, and over the 3.3 hr duration of the halo, particles could have fallen 3-12 km, causing downward transport of water and dust. Halo-forming clouds are likely rare due to the high supersaturation of water that is required but may be more common in northern subtropical regions during northern midsummer.
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Affiliation(s)
| | - D. Toledo
- Instituto Nacional de Técnica AerospacialMadridSpain
| | - V. Apestigue
- Instituto Nacional de Técnica AerospacialMadridSpain
| | - I. Arruego
- Instituto Nacional de Técnica AerospacialMadridSpain
| | | | - P. Patel
- Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadenaCAUSA
- Mullard Space Science LaboratoryUniversity College LondonLondonUK
| | - S. Guzewich
- NASA Goddard Space Flight CenterGreenbeltMDUSA
| | | | | | - L. Tamppari
- Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadenaCAUSA
| | | | | | - J. Maki
- Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadenaCAUSA
| | | | - A. Brown
- Plancius ResearchSeverna ParkMDUSA
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6
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Irwin PGJ, Teanby NA, Fletcher LN, Toledo D, Orton GS, Wong MH, Roman MT, Pérez‐Hoyos S, James A, Dobinson J. Hazy Blue Worlds: A Holistic Aerosol Model for Uranus and Neptune, Including Dark Spots. J Geophys Res Planets 2022; 127:e2022JE007189. [PMID: 35865671 PMCID: PMC9286428 DOI: 10.1029/2022je007189] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 04/28/2022] [Accepted: 05/16/2022] [Indexed: 06/15/2023]
Abstract
We present a reanalysis (using the Minnaert limb-darkening approximation) of visible/near-infrared (0.3-2.5 μm) observations of Uranus and Neptune made by several instruments. We find a common model of the vertical aerosol distribution i.e., consistent with the observed reflectivity spectra of both planets, consisting of: (a) a deep aerosol layer with a base pressure >5-7 bar, assumed to be composed of a mixture of H2S ice and photochemical haze; (b) a layer of photochemical haze/ice, coincident with a layer of high static stability at the methane condensation level at 1-2 bar; and (c) an extended layer of photochemical haze, likely mostly of the same composition as the 1-2-bar layer, extending from this level up through to the stratosphere, where the photochemical haze particles are thought to be produced. For Neptune, we find that we also need to add a thin layer of micron-sized methane ice particles at ∼0.2 bar to explain the enhanced reflection at longer methane-absorbing wavelengths. We suggest that methane condensing onto the haze particles at the base of the 1-2-bar aerosol layer forms ice/haze particles that grow very quickly to large size and immediately "snow out" (as predicted by Carlson et al. (1988), https://doi.org/10.1175/1520-0469(1988)045<2066:CMOTGP>2.0.CO;2), re-evaporating at deeper levels to release their core haze particles to act as condensation nuclei for H2S ice formation. In addition, we find that the spectral characteristics of "dark spots", such as the Voyager-2/ISS Great Dark Spot and the HST/WFC3 NDS-2018, are well modelled by a darkening or possibly clearing of the deep aerosol layer only.
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Affiliation(s)
| | - N. A. Teanby
- School of Earth SciencesUniversity of BristolBristolUK
| | - L. N. Fletcher
- School of Physics & AstronomyUniversity of LeicesterLeicesterUK
| | - D. Toledo
- Instituto Nacional de Técnica Aeroespacial (INTA)MadridSpain
| | - G. S. Orton
- Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadenaCAUSA
| | - M. H. Wong
- Center for Integrative Planetary ScienceUniversity of CaliforniaBerkeleyCAUSA
| | - M. T. Roman
- School of Physics & AstronomyUniversity of LeicesterLeicesterUK
| | | | - A. James
- Department of PhysicsUniversity of OxfordOxfordUK
| | - J. Dobinson
- Department of PhysicsUniversity of OxfordOxfordUK
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7
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Rese A, Conte M, Pastore F, Ciaglia G, Pepe A, Toledo D, Panelli G, Francomacaro F, Iorio V. PD-0738 Radiosurgery in brain metastases: single vs multifraction treatment. Radiother Oncol 2021. [DOI: 10.1016/s0167-8140(21)07017-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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8
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Rodriguez-Manfredi JA, de la Torre Juárez M, Alonso A, Apéstigue V, Arruego I, Atienza T, Banfield D, Boland J, Carrera MA, Castañer L, Ceballos J, Chen-Chen H, Cobos A, Conrad PG, Cordoba E, del Río-Gaztelurrutia T, de Vicente-Retortillo A, Domínguez-Pumar M, Espejo S, Fairen AG, Fernández-Palma A, Ferrándiz R, Ferri F, Fischer E, García-Manchado A, García-Villadangos M, Genzer M, Giménez S, Gómez-Elvira J, Gómez F, Guzewich SD, Harri AM, Hernández CD, Hieta M, Hueso R, Jaakonaho I, Jiménez JJ, Jiménez V, Larman A, Leiter R, Lepinette A, Lemmon MT, López G, Madsen SN, Mäkinen T, Marín M, Martín-Soler J, Martínez G, Molina A, Mora-Sotomayor L, Moreno-Álvarez JF, Navarro S, Newman CE, Ortega C, Parrondo MC, Peinado V, Peña A, Pérez-Grande I, Pérez-Hoyos S, Pla-García J, Polkko J, Postigo M, Prieto-Ballesteros O, Rafkin SCR, Ramos M, Richardson MI, Romeral J, Romero C, Runyon KD, Saiz-Lopez A, Sánchez-Lavega A, Sard I, Schofield JT, Sebastian E, Smith MD, Sullivan RJ, Tamppari LK, Thompson AD, Toledo D, Torrero F, Torres J, Urquí R, Velasco T, Viúdez-Moreiras D, Zurita S. The Mars Environmental Dynamics Analyzer, MEDA. A Suite of Environmental Sensors for the Mars 2020 Mission. Space Sci Rev 2021; 217:48. [PMID: 34776548 PMCID: PMC8550605 DOI: 10.1007/s11214-021-00816-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/08/2021] [Indexed: 05/16/2023]
Abstract
NASA's Mars 2020 (M2020) rover mission includes a suite of sensors to monitor current environmental conditions near the surface of Mars and to constrain bulk aerosol properties from changes in atmospheric radiation at the surface. The Mars Environmental Dynamics Analyzer (MEDA) consists of a set of meteorological sensors including wind sensor, a barometer, a relative humidity sensor, a set of 5 thermocouples to measure atmospheric temperature at ∼1.5 m and ∼0.5 m above the surface, a set of thermopiles to characterize the thermal IR brightness temperatures of the surface and the lower atmosphere. MEDA adds a radiation and dust sensor to monitor the optical atmospheric properties that can be used to infer bulk aerosol physical properties such as particle size distribution, non-sphericity, and concentration. The MEDA package and its scientific purpose are described in this document as well as how it responded to the calibration tests and how it helps prepare for the human exploration of Mars. A comparison is also presented to previous environmental monitoring payloads landed on Mars on the Viking, Pathfinder, Phoenix, MSL, and InSight spacecraft.
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Affiliation(s)
| | | | | | - V. Apéstigue
- Instituto Nacional de Técnica Aeroespacial (INTA), Madrid, Spain
| | - I. Arruego
- Instituto Nacional de Técnica Aeroespacial (INTA), Madrid, Spain
| | - T. Atienza
- Universidad Politécnica de Cataluña, Barcelona, Spain
| | - D. Banfield
- Cornell Center for Astrophysics and Planetary Science, Cornell University, Ithaca, NY USA
| | - J. Boland
- Jet Propulsion Laboratory/California Institute of Technology, Pasadena, CA USA
| | | | - L. Castañer
- Universidad Politécnica de Cataluña, Barcelona, Spain
| | - J. Ceballos
- Instituto de Microelectrónica de Sevilla (US-CSIC), Seville, Spain
| | - H. Chen-Chen
- Universidad del País Vasco (UPV/EHU), Bilbao, Spain
| | - A. Cobos
- CRISA-Airbus, Tres Cantos, Spain
| | | | - E. Cordoba
- Jet Propulsion Laboratory/California Institute of Technology, Pasadena, CA USA
| | | | | | | | - S. Espejo
- Instituto de Microelectrónica de Sevilla (US-CSIC), Seville, Spain
| | - A. G. Fairen
- Centro de Astrobiología (INTA-CSIC), Madrid, Spain
| | | | - R. Ferrándiz
- Centro de Astrobiología (INTA-CSIC), Madrid, Spain
| | - F. Ferri
- Università degli Studi di Padova, Padova, Italy
| | - E. Fischer
- University of Michigan, Ann Arbor, MI USA
| | | | | | - M. Genzer
- Finnish Meteorological Institute, Helsinki, Finland
| | - S. Giménez
- Centro de Astrobiología (INTA-CSIC), Madrid, Spain
| | - J. Gómez-Elvira
- Instituto Nacional de Técnica Aeroespacial (INTA), Madrid, Spain
| | - F. Gómez
- Centro de Astrobiología (INTA-CSIC), Madrid, Spain
| | | | - A.-M. Harri
- Finnish Meteorological Institute, Helsinki, Finland
| | - C. D. Hernández
- Jet Propulsion Laboratory/California Institute of Technology, Pasadena, CA USA
| | - M. Hieta
- Finnish Meteorological Institute, Helsinki, Finland
| | - R. Hueso
- Universidad del País Vasco (UPV/EHU), Bilbao, Spain
| | - I. Jaakonaho
- Finnish Meteorological Institute, Helsinki, Finland
| | - J. J. Jiménez
- Instituto Nacional de Técnica Aeroespacial (INTA), Madrid, Spain
| | - V. Jiménez
- Universidad Politécnica de Cataluña, Barcelona, Spain
| | - A. Larman
- Added-Value-Solutions, Elgoibar, Spain
| | - R. Leiter
- Jet Propulsion Laboratory/California Institute of Technology, Pasadena, CA USA
| | - A. Lepinette
- Centro de Astrobiología (INTA-CSIC), Madrid, Spain
| | | | - G. López
- Universidad Politécnica de Cataluña, Barcelona, Spain
| | - S. N. Madsen
- Jet Propulsion Laboratory/California Institute of Technology, Pasadena, CA USA
| | - T. Mäkinen
- Finnish Meteorological Institute, Helsinki, Finland
| | - M. Marín
- Centro de Astrobiología (INTA-CSIC), Madrid, Spain
| | | | - G. Martínez
- Lunar and Planetary Institute, Houston, TX USA
| | - A. Molina
- Centro de Astrobiología (INTA-CSIC), Madrid, Spain
| | | | | | - S. Navarro
- Centro de Astrobiología (INTA-CSIC), Madrid, Spain
| | | | - C. Ortega
- Added-Value-Solutions, Elgoibar, Spain
| | - M. C. Parrondo
- Instituto Nacional de Técnica Aeroespacial (INTA), Madrid, Spain
| | - V. Peinado
- Centro de Astrobiología (INTA-CSIC), Madrid, Spain
| | - A. Peña
- CRISA-Airbus, Tres Cantos, Spain
| | | | | | | | - J. Polkko
- Finnish Meteorological Institute, Helsinki, Finland
| | - M. Postigo
- Centro de Astrobiología (INTA-CSIC), Madrid, Spain
| | | | | | - M. Ramos
- Universidad de Alcalá, Alcalá de Henares, Spain
| | | | - J. Romeral
- Centro de Astrobiología (INTA-CSIC), Madrid, Spain
| | - C. Romero
- Centro de Astrobiología (INTA-CSIC), Madrid, Spain
| | | | - A. Saiz-Lopez
- Dept. of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, CSIC, Madrid, Spain
| | | | - I. Sard
- Added-Value-Solutions, Elgoibar, Spain
| | - J. T. Schofield
- Jet Propulsion Laboratory/California Institute of Technology, Pasadena, CA USA
| | - E. Sebastian
- Centro de Astrobiología (INTA-CSIC), Madrid, Spain
| | - M. D. Smith
- NASA Goddard Space Flight Center, Greenbelt, MD USA
| | - R. J. Sullivan
- Cornell Center for Astrophysics and Planetary Science, Cornell University, Ithaca, NY USA
| | - L. K. Tamppari
- Jet Propulsion Laboratory/California Institute of Technology, Pasadena, CA USA
| | - A. D. Thompson
- Jet Propulsion Laboratory/California Institute of Technology, Pasadena, CA USA
| | - D. Toledo
- Instituto Nacional de Técnica Aeroespacial (INTA), Madrid, Spain
| | | | - J. Torres
- Centro de Astrobiología (INTA-CSIC), Madrid, Spain
| | - R. Urquí
- Centro de Astrobiología (INTA-CSIC), Madrid, Spain
| | | | | | - S. Zurita
- Centro de Astrobiología (INTA-CSIC), Madrid, Spain
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9
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Fernando S, Schwarz N, Sandeman L, Skoumbourdis T, Dimasi C, Xie J, Zareh J, Williamson A, Toledo D, Di Bartolo B, Tan J, Nicholls S, Proud C, Psaltis P, Bursill C. 037 Eukaryotic Elongation Factor 2 Kinase (eEF2k) Regulates Foam Cell Formation and Atherosclerosis by Promoting Translation and Glycosylation of CD36 Scavenger Receptor Expression in Macrophages. Heart Lung Circ 2020. [DOI: 10.1016/j.hlc.2020.09.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Pastore F, Rese A, Panelli G, Pepe A, Toledo D, Iorio V. PO-0713 PDRN-based cream in the prevention and treatment of radiodermatitis in Head and nech cancer: our experience. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)31133-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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11
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Pastore F, Rese A, Panelli G, Pepe A, Toledo D, Iorio V. EP-1595 In unoperable SSCC, radiotherapy schedules could be chosen using dermoscopic features? Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)32015-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Fernando S, Schwarz N, Sandeman L, Skoumbourdis T, Zareh J, Williamson A, Dimasi C, Toledo D, Tan J, B BD, Bursill C, Nicholls S, Proud C, Psaltis P. Eukaryotic Elongation Factor 2 Kinase (eEF2k) Regulates Cholesterol Uptake by Macrophages via CD36 Scavenger Receptor Expression. Heart Lung Circ 2019. [DOI: 10.1016/j.hlc.2019.06.453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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Williamson A, Toledo D, Schwarz N, Fernando S, Dimasi C, Liyanage S, Skoumbourdis T, Chandrakanthan V, Tan J, Bonder C, Di Bartolo B, Nicholls S, Bursill C, Psaltis P. Postnatal Mouse Aorta Contains Yolk Sac-Derived Haemangioblasts with Myeloid and Endothelial Plasticity and Vasculogenic Capacity. Heart Lung Circ 2019. [DOI: 10.1016/j.hlc.2019.06.455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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14
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Cárdenas AM, Gallardo P, Toledo D. Suitability of multiple Mediterranean oak species as a food resource for Reticulitermes grassei Clément (Isoptera: Rhinotermitidae). Bull Entomol Res 2018; 108:532-539. [PMID: 29103385 DOI: 10.1017/s0007485317001043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The subterranean termite Reticulitermes grassei Clément causes lesions in the trunk of Quercus suber L. by constructing feeding galleries, but no information is available regarding other Quercus species from the Mediterranean region. This work aimed to study the suitability of the other main oak species of Mediterranean forests as a food resource for R. grassei. Two experiments, choice and non-choice feeding, were conducted lasting for 15, 30, and 45 days each. In the non-choice experiment, termites were offered one of the following food types: Quercus suber, Quercus ilex L., Quercus faginea Lam, cork or Pinus pinea L., which was considered the control. The choice feeding experiment used all the same food types listed above, supplied simultaneously in the same container. Food selection was examined by analysing the relationships over time between surviving termites and food consumption. The results indicated that R. grassei could be considered a generalist species, as it consumed the cork and wood of all oak species, as well as displaying a clear preference for soft wood (pine). Correlation analysis indicated that consumption was not dependent on wood density. Survival of R. grassei was influenced by the time of exposure to different oak species, but a high survival rate was maintained over time in the pine treatment (upper 70% in the three experiments). Given these results, it can be concluded that all the oak species are a suitable food source for R. grassei.
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Affiliation(s)
- A M Cárdenas
- Department of Zoology,Campus Rabanales, University of Córdoba,Córdoba E-14071,Spain
| | - P Gallardo
- Department of Zoology,Campus Rabanales, University of Córdoba,Córdoba E-14071,Spain
| | - D Toledo
- Department of Zoology,Campus Rabanales, University of Córdoba,Córdoba E-14071,Spain
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15
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Castro M, Horie L, Kawamura K, Rascov F, Toledo D. MON-P005: Diabetes Specific Enteral Formulas in ICU. Clin Nutr 2017. [DOI: 10.1016/s0261-5614(17)31078-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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16
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Castro M, Girade F, Horie L, Toledo D, Oliveira M. SUN-PP058: Which Body Weight Should I Use in Critical III. Clin Nutr 2015. [DOI: 10.1016/s0261-5614(15)30209-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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17
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Castro M, Toledo D, Horie L, Antunes C, Seiji Kawamura K, Tepedino J. PP016-MON: Knowledge of Different Medical Specialties in Nutritional Therapy. Clin Nutr 2014. [DOI: 10.1016/s0261-5614(14)50351-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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18
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Toledo D, Barela J, Kohn A. P411: ERD/ERS differences between young and older adults during passive ankle movement. Clin Neurophysiol 2014. [DOI: 10.1016/s1388-2457(14)50519-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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19
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Martínez-Baz I, Díaz-González J, Guevara M, Toledo D, Zabala A, Domínguez A, Castilla J. Actitudes, percepciones y factores asociados a la vacunación antigripal en los profesionales de atención primaria de Navarra, 2011-2012. An Sist Sanit Navar 2013; 36:263-73. [DOI: 10.4321/s1137-66272013000200009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 05/13/2013] [Accepted: 05/21/2013] [Indexed: 11/11/2022]
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20
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Di Franco R, Falivene S, Calvanese M, Traettino M, Nicolucci M, Pepe A, Borrelli D, Toledo D, Mammucari M, Sarli E, De Palma G, Ravo V, Cappabianca S, Muto P. PO-0742: Palliative radiotherapy for bone metastases. Differences in the symptomatic relief according to the primary tumor. Radiother Oncol 2013. [DOI: 10.1016/s0167-8140(15)33048-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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21
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Macias A, Toledo D, Santiesteban E, Aguirre F, Popa X, Vazquez A, Mazorra Z, Crombet T, Perez R. 1249 Combination of platinum standard first front line chemotherapy and anti-idiotype 1E10/aluminum vaccine in patients with advanced non- small- cell lung cancer (NSCLC). EJC Suppl 2009. [DOI: 10.1016/s1359-6349(09)70461-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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22
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Stein F, Barros R, Feitosa F, Toledo D, Silva J, Isola A, Rezende E. Prognostic factors of elderly patients admitted to an ICU. Crit Care 2008. [PMCID: PMC4088891 DOI: 10.1186/cc6741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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23
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Swaroop N, Chen F, Wang L, Dokka S, Toledo D, Rojanasakul Y. Inhibition of nuclear transcription factor-kappaB by specific IkappaB kinase peptide inhibitor. Pharm Res 2001; 18:1631-3. [PMID: 11758774 DOI: 10.1023/a:1013051019098] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- N Swaroop
- Department of Basic Pharmaceutical Sciences, West Virginia University, Morgantown 26506, USA
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24
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Gabe ED, Favaloro RR, Favaloro MR, Raffaelli HA, Machaín AH, Abud JA, Dulbecco EA, García Ben M, Toledo D, Macchia A. [Coronary surgery in elderly patients. In-hospital and long-term results]. Rev Esp Cardiol 2001; 54:709-14. [PMID: 11412777 DOI: 10.1016/s0300-8932(01)76386-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND Taking into account the steady increase in the number of elderly patients requiring coronary artery bypass grafting, we sought to analyze the in-hospital and long-term evolution of a group of elderly patients (>/= 75 years) who underwent coronary artery bypass grafting, and to identify clinical predictors of mortality and long-term symptoms. METHODS Between April 1996 and February 2000, 207 patients older than 75 years of age who had undergone coronary bypass grafting were prospectively and consecutively analyze. Mean age was 78.4 +/- 2.7. RESULTS An average of 2.6 grafts/patients was constructed. Left mammary artery was used in 93% of patients. The in-hospital incidence of heart failure, atrial fibrillation, preoperative infarction and stroke was 38%, 29%, 4.8% and 2.8% respectively. The in-hospital mortality rate was 5.8%. Mean follow-up was 18 months (25th an 75th percentiles 9-29). Late mortality rate was 4.1% in eight patients. Excluding the in-hospital deaths, the estimated probability of survival (Kaplan-Meier) at 3 years was 94% and the survival freedom from symptoms was 86%. A multivariate analysis showed that only age was predictor of in-hospital mortality (OR 1.16, p = 0.009). Only peripheral vascular disease was found as a predictor of symptoms during the long-term follow-up (p = 0.001). CONCLUSIONS In this series of senile patients who underwent coronary surgery, those of an older age (> 80 years) showed a higher risk of in-hospital mortality. The presence of peripheral vascular disease is useful in the prognosis assessment of the group.
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Affiliation(s)
- E D Gabe
- Departamentos de Cardiología Instituto de Cardiología, Fundación Favaloro, Buenos, Argentina.
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25
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Dokka S, Toledo D, Wang L, Shi X, Huang C, Leonard S, Rojanasakul Y. Free radical-mediated transgene inactivation of macrophages by endotoxin. Am J Physiol Lung Cell Mol Physiol 2000; 279:L878-83. [PMID: 11053023 DOI: 10.1152/ajplung.2000.279.5.l878] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Endotoxin, the lipopolysaccharide component of gram-negative bacteria, is a common contaminant of plasmid DNA preparations. The present study investigated the effect of endotoxin on gene transfection efficiency and the role of reactive oxygen species (ROS) in this process. Gene transfection studies were performed in various cell types with cytomegalovirus-luciferase as a reporter plasmid and cationic liposome as a transfecting agent. The presence of endotoxin in plasmid DNA preparations severely limited transgene expression in macrophages but had little or no effect in other cell types tested. This decreased transfection was dependent on ROS-mediated cellular toxicity induced by endotoxin. Neutralizing the endotoxin by the addition of polymyxin B effectively increased transfection efficiency and reduced toxicity. Electron spin resonance studies confirmed the formation of ROS in endotoxin-treated cells and their inhibition by free radical scavengers. The ROS scavenger N-t-butyl-alpha-phenylnitrone, the H(2)O(2) scavenger catalase, and the.OH scavenger sodium formate effectively inhibited endotoxin-induced effects, whereas the O(2)(-) scavenger superoxide dismutase had lesser effects. These results indicate that multiple oxidative species are involved in the transfection inactivation process and that.OH formed by H(2)O(2)-dependent, metal-catalyzed Fenton reaction play a major role in this process.
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Affiliation(s)
- S Dokka
- Department of Pharmaceutical Sciences, West Virginia University Health Sciences Center, Morgantown, West Virginia 26506, USA
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Abstract
Macrophage transfection studies are crucial for understanding gene regulation and expression. However, gene transfection in macrophages is difficult. We have shown here that macrophages are more resistant to gene transfection compared with other cell types. To further develop an efficient gene delivery system for macrophages, we evaluated various liposomal and non-liposomal agents including LipofectAMINE(R), Lipofectin(R), DOTAP, DEAE-dextran, and the DNA condensing agent protamine sulfate for their ability to promote gene transfection. CMV-luciferase was used as a reporter plasmid. Macrophage transfection was maximal at the DNA:LipofectAMINE:protamine ratio of 1:12:1 microg/ml. The LipofectAMINE formulation showed a 10-12-fold increase in transfection efficiency over DOTAP and a 4-5-fold increase over Lipofectin. This transfection method showed minimal toxicity at the concentrations tested and was at least 20-25-fold superior to the most frequently used DEAE-dextran method for macrophage transfection.
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Affiliation(s)
- S Dokka
- Department of Basic Pharmaceutical Sciences, West Virginia University, P.O. Box 9530, Morgantown, WV 26506, USA
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27
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Abstract
PURPOSE The objectives of this study are to investigate the toxicity associated with polycationic liposomes and to elucidate the underlying mechanism. We tested the hypothesis that the positive charge of liposomes is a key determinant of toxicity by testing differently charged liposomes in mice. METHODS Differently charged liposomal systems including cationic liposomes, LipofectAMINE and DOTAP, and neutral and negative liposomes were evaluated for their toxicity after pulmonary administration in mice. LDH assay and differential cell counts were performed to measure toxicity and pulmonary inflammation, respectively. Reactive oxygen intermediates (ROI) were assessed by chemiluminescence. RESULTS Instillation of cationic liposomes elicited dose-dependent toxicity and pulmonary inflammation. This effect was more pronounced with the multivalent cationic liposome LipofectAMINE as compared to the monovalent cationic DOTAP. Neutral and negative liposomes did not exhibit lung toxicity. Toxicity associated with cationic liposomes correlated with the oxidative burst induced by the liposomes. LipofectAMINE induced a dose-dependent increase in ROI generation. This effect was less pronounced with DOTAP and absent with neutral and negative liposomes. CONCLUSIONS ROI play a key role in cationic lipid-mediated toxicity. Polyvalent cationic liposomes cause a release of ROI which are responsible for the pulmonary toxicity.
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Affiliation(s)
- S Dokka
- West Virginia University, Department of Basic Pharmaceutical Sciences, Morgantown 26506, USA
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Abstract
Advances in molecular and cellular biology have identified the cellular mediators that regulate many disease processes and have facilitated the development of new therapeutic agents that control these events. However, the size, complexity, and cellular inaccessibility of these therapeutic agents make their cellular delivery difficult. Here, we describe an efficient cellular delivery system that exploits the membrane-translocating ability of signal peptides to import functional peptides into cells. Molecular conjugates consisting of the signal import peptide (IP) and nuclear localization sequence (NLS) of the transcription factor NF-kappaB were synthesized. Electrophoretic mobility shift and enzyme-linked immunosorbent assays were used to assess the inhibitory effects of these synthetic peptides on agonist-induced NF-kappaB nuclear translocation and transcriptional activation. Our results indicated that the peptides were effective in inhibiting both the nuclear translocation and transcriptional activation of NF-kappaB. However, their effects required the presence of the IP moiety for efficient cellular entry of the NLS. Structural analysis of IP showed that the hydrophobic domain, and to a lesser extent the N-terminal domain, was responsible for the membrane translocating activity of IP.
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Affiliation(s)
- Y Rojanasakul
- Department of Basic Pharmaceutical Sciences, West Virginia University, School of Pharmacy, PO Box 9530, Morgantown, WV 26506, USA.
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29
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Taibo MA, Nevado M, Iturburu I, Gómez Palacios A, Toledo D, Méndez JJ. [Acute cholecystitis: predictive potential of gallbladder measurement]. Rev Esp Enferm Dig 1994; 86:628-9. [PMID: 7946614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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30
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Toledo D, Neves AG. Purification and partial characterization of a second toxin from the scorpion Tityus serrulatus. Comp Biochem Physiol B 1976; 55:249-53. [PMID: 963981 DOI: 10.1016/0305-0491(76)90240-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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