c ca cb cc cd ce cf cg ch ci ck cl cm cn co cp cr cs ct cu cw cy cz

Перевод: concretion

[существительное]
сращение; сращивание; срастание; сгущение; коагуляция ; конкреция ; осаждение; оседание; твердая сросшаяся масса; конкремент ; камень ; камешек

Тезаурус:

1. The concentrations of these biomarker PLFA (Table 1) imply more Desulfovibrio and less Desulfobacter within the concretion than in the mud.
2. These findings suggest that the enrichment of Desulfovibrio within the siderite concretion may be an important feature, controlling growth of the concretion.
3. Modern meteoric precipitations and regional ground waters at equivalent high latitudes have lighter isotope signatures O. Palaeotemperatures calculated from O of the meteoric concretion cements and vein-fills suggest mean annual air temperatures of 10C.
4. The concretion was subspherical, 7cm in diameter and dark grey to black, its host an anoxic, black clayey-silt.
5. This makes them uniquely suitable for investigations into the actual mechanisms of siderite concretion formation.
6. The characteristic PFLA data gave no indication that either of these organisms was present in the mud or the concretion.
7. The production of ferrous iron, hydroxyl ions and bicarbonate should all favour siderite formation To learn whether microbial Fe(III) reduction played a role in siderite formation, we analysed the microbial populations in a concretion and in two host-sediment samples from the marsh.
8. These results suggest that a high proportion of the microorganisms living in the concretion survive by anaerobic respiration such as Fe(III) or sulphate reduction.
9. O ranges between -11 and -13 PDB in concretion cements, and between 12 and -14 PDB in vein calcites.
10. No ubiquinones were found in either the mud or the concretion.
11. No PLTE or PLDE were detected in the concretion.
12. The MK/PLFA level in the concretion was two to three times higher than in the mud (Table 1).