1.
Biol Sci Space
; 18(3): 144-5, 2004 Nov.
Artículo
en Inglés
| MEDLINE
| ID: mdl-15858362
RESUMEN
A wide variety of methods have been proposed to detect microbial activities, but most of them can be applied to limited categories of terrestrial organisms. We propose here to use phosphatase activity, which seems to be an essential catalytic activity for all the terrestrial organisms, and possibly for extraterrestrial organisms. We determined phosphatase activity in core samples, chimney samples, and sea water samples obtained in submarine hydrothermal systems located at Suiyo Seamount, Izu-Bonin Arc, and South Mariana. It was shown that phosphatase activity is one of possible biomarkers for extant life.
Asunto(s)
Fosfatasa Ácida/metabolismo , Fosfatasa Alcalina/metabolismo , Agua de Mar/microbiología , Calor , Concentración de Iones de Hidrógeno , Océanos y Mares , Sales (Química)
2.
Biol Sci Space
; 16(3): 199-200, 2002 Nov.
Artículo
en Japonés
| MEDLINE
| ID: mdl-12695621