The presence and distribution of isoprenoid glycerol dialkyl glycerol tetraethers (GDGTs), lipids that constitute the membranes of Archaea, have been investigated in a 50-cm long core from a Swedish peat bog. In the acrotelm, the periodically water saturated and thus oxic upper layer of the peat bog, only minor amounts of GDGTs were found. These amounts increase considerably in the catotelm, th...

One important assumption in applying 210Pb-dating is that atmospherically deposited 210Pb is immobilized in the peat or sediment column. This assumption has been challenged widely, but has never been evaluated experimentally. We evaluated Pb mobility and the chemical forms in which Pb is stabilized in peat profiles by adding either soluble or particulate Pb to intact peat cores that were mainta...

to study the effect of different substrates on growth and yield of gerbera, this experiment was carried out as randomized completely block design with 14 treatments and 3 replications. treatments were as fallowing: fine sand, peat+fine sand (25%+75%), peat+fine sand (50%+50%), perlite+peat (75%+25%), perlite+peat (50%+50%), perlite+peat (25% +75%), perlite+peat+expanded clay (25%+70%+5%), perli...

Morphological changes that take place in peat cultures of several species of rhizobia were examined. These changes seemed to be associated with enhanced survival of cells in peat and after inoculation onto plastic beads, which were used as a model system for seeds. Cell wall changes, in which the periplasmic space appeared to be occluded with electron-dense material, were observed in Rhizobium ...

The structural and functional composition of humic acids in natural urbanized areas the European Far North Arctic has been studied using modern physical chemical research methods. It is shown that content fulvic for most soils higher than acids; soils, process humus formation humate (replantozem, pelozem humus-peat soil), humate-fulvate (turf soil, culturozem urbanozem) fulvate type (gleezem li...

A relevant part of the geotechnical infrastructure in north Europe and overseas is built on soft organic soils, including peat. Peat extremely vulnerable to climate-related hazards as increased temperature accelerates drying, shrinkage decomposition matter. exhibits dramatic changes volume with water content. As material deforms, pore space evolves retention response. The evolution leads a hyst...