Further, XAFS spectroscopy, being a direct method for determining arsenic speciation coals, can also be used to assess the critical assumptions and inferences present in less direct methods of arsenic speciation based on sequential leaching and other fractionation methods.
We have recently optimized instrumentation and methods for speciation analysis of As by hydride generation-atomic absorption spectrometry using a cryotrap (HG-CT-AAS) for capture and separation of arsines, and a multiple microflame quartz tube atomizer (multiatomizer) for a more efficient atomization of As (Matous ek et al. 2002, 2008).
Sequence analysis of the rpoB gene and 16S ribosomal RNA has been expanded recently as another method for speciation of NTM [ 70, 71].
One particularly unusual method of examining speciation in this text is the comparison of variation in domestic species with variation in related wild species, for example, domestic Rock Dove breeds and wild doves and pigeons (Table 11.3, p.229).
Additionally, it is a more rapid and specific method of MTC speciation apart from being less laborious compared with biochemical, phenotypic and IS 6110-restriction fragment length polymorphism (RFLP) analysis [ 22].
Laboratory isolation of M. lentiflavum from clinical specimens in Finland has increased independently of speciation methods, but details of patients with disease are lacking (33 ).
When the mutation mode was "step-wise" (see Mutation model section of Methods), speciation never occurred even with high mutation rates.
A popular method for inferring geography of speciation from species distributions is the age-range correlation.
While providing sensitivity in the attomole range, this method is not capable of speciation, i.e., chemical identification and quantification of the parent compound and metabolites.
This method calculates maximum likelihood estimates of speciation rate parameters and a likelihood score per tree.
