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1.
Science ; 361(6401): 490-493, 2018 08 03.
Article in English | MEDLINE | ID: mdl-30045881

ABSTRACT

The presence of liquid water at the base of the martian polar caps has long been suspected but not observed. We surveyed the Planum Australe region using the MARSIS (Mars Advanced Radar for Subsurface and Ionosphere Sounding) instrument, a low-frequency radar on the Mars Express spacecraft. Radar profiles collected between May 2012 and December 2015 contain evidence of liquid water trapped below the ice of the South Polar Layered Deposits. Anomalously bright subsurface reflections are evident within a well-defined, 20-kilometer-wide zone centered at 193°E, 81°S, which is surrounded by much less reflective areas. Quantitative analysis of the radar signals shows that this bright feature has high relative dielectric permittivity (>15), matching that of water-bearing materials. We interpret this feature as a stable body of liquid water on Mars.

3.
Rev. chil. obstet. ginecol ; 49(1): 26-32, 1984.
Article in Spanish | LILACS | ID: lil-24284

ABSTRACT

Se analizan y clasifican 25.000 frotis cervicales desde un punto de vista inflamatorio-infeccioso, correspondientes a un total de 25.000 pacientes, 172 de las cuales tuvieron frotis sospechosos de neoplasia. Solo en 50,53% se encontraron signos de "bienestar" cervico-vaginal, y el resto tenia algun tipo de infeccion o alteracion. En 6,84% de los casos no se pudo identificar flora o signos especificos de inflamacion. La infeccion especifica mas importante fue Gardnerela vaginalis, en 23,35% de los casos. Un tercio de la poblacion tenia algun tipo de infeccion por agente transmision sexual. La evidencia citologica de infeccion por condiloma fue varias veces mas frecuente en las pacientes con sospecha de neoplasia. Se discute el modo de informacion citologica en lo que se refiere a evidencia y sospecha de infeccion por virus condiloma


Subject(s)
Humans , Female , Bacterial Infections , Uterine Cervical Diseases , Vaginal Smears , Vaginal Diseases
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