Buscar
Mostrando ítems 21-30 de 1240
In situ speciation of uranium in treated acid mine drainage using the diffusion gradients in thin films technique (DGT)
(2017-02-01)
The exchange membranes P81 and DE81 and Chelex-100 resin were used to perform in situ speciation of uranium in treated acid mine drainage at the Osamu Utsumi mining site, Poços de Caldas city, Southeast Brazil. To investigate ...
Use of diffusive gradient in thin films for in situ measurements: A review on the progress in chemical fractionation, speciation and bioavailability of metals in waters
(2017-08-29)
Chemical fractionation, speciation analysis and bioavailability of metals and metalloids in waters have received increased attention in recent years. However, this interest is not matched by progress in improving species ...
Chromosomes and speciation in tuco-tuco (Ctenomys, Hystricognathi, Rodentia)Хромосомы и видообразование у туко-туко (Ctenomys, Hystricognathi, Rodentia)
(Institute of Cytology and Genetics of Siberian Branch of the Russian Academy of Sciences, 2016-09)
Tuco-tucos, South American rodents of the genus Ctenomys represent an interesting model of speciation. Their strict territorial and solitary life under the earth, vast but highly fragmented habitats, low migration activity ...
Preconcentration, speciation, and determination of key elements in biological samples in Latin America
(Springer Heidelberg, 2013-08)
The concentrations of trace elements in biological samples are far below those achieved directly by most atomic or plasma-based techniques and the detection power needs to be improved by the use of a preconcentration step. ...
Studying the effect of an ionic liquid on cloud point extraction technique for highly efficient preconcentration and speciation analysis of tellurium in water, soil and sediment samples
(Elsevier Science, 2020-05)
A simple, novel and highly sensitive ionic liquid-assisted cloud point extraction (IL-CPE) and preconcentration method was developed for the determination and speciation analysis of tellurium, using 1-octyl-3-methylimidazolium ...
Empirical demonstration of hybrid chromosomal races in house mice
(Society for the Study of Evolution, 2016-06-11)
Western house mice (Mus musculus domesticus) and common shrews (Sorex araneus) are important models for study of chromosomal speciation. Both had ancestral karyotypes consisting of telocentric chromosomes, and each is ...