Encontrados 3 documentos, a visualizar página 1 de 1
Degradability and Sediment Sorption of an Alcohol Polyglycol Ether Surfactant P...
Fonseca, Júlio C.; Marques, João C.; Madeira, Vítor M. C.This work reports studies of the degradation rates of a fattyalcohol polyglycol ether non-ionic surfactant, Genapol OXD-080, putatively useful for the control of red swamp crayfish (Procambarus clarkii Girard) in rice fields under laboratory and field conditions. The influence of temperature,sediment site specificity and sorption were taken into account.The degradation kinetics of the surfactant depends on the ...
Estimation of ecological exergy using weighing parameters determined from DNA c...
Fonseca, Júlio C.; Pardal, Miguel A.; Azeiteiro, Ulisses M.; Marques, João C.We studied the changes of exergy and specific exergy with data of benthic macrofauna communities, periodically sampled along an estuarine gradient of eutrophication in the Mondego estuary (Western Portugal). Exergy estimates were calculated from organism biomass, based on weighing factors for the relative content of exergy per unit of biomass determined from DNA contents of organisms. Results were discussed in ...
Nuclear DNA in the determination of weighing factors to estimate exergy from or...
Fonseca, Júlio C.; Marques, João C.; Paiva, Artur A.; Freitas, Albertina M.; Madeira, Vítor M. C.; Jørgensen, Sven E.The application of ecological exergy as a suitable system-oriented development indicator of ecosystems and the estimation proposals from biomass are revised. DNA contents (C-values) of several groups of organisms are figured, either determined by flow cytometry or taken from literature. The applicability of DNA contents for determination of weighing factors to estimate ecological exergy from the biomass of orga...
| Financiadores do RCAAP | |||||||
|
|
|
|
|
|
||