Taxonomic characterization

Rosello-Mora RA, Caccavo F Jr, Osterlehner K, et al. 1994. Isolation and taxonomic characterization of a halotolerant, facultatively iron-reducing bacterium. Syst Appl Microbiol 17 569-73. 

The use of enantiomers as additional markers for taxonomic characterization of aromatic plants may be very helpful. The differences in the enantiomeric distribution of trans- and cis- sabinene hydrates in two Origanum species enable the species to be distinguished in spite of their similar essential oil compositions. A further study on the natural variation of the enantiomeric composition within a wild population may be carried out in order to examine the stability in a taxon (including the possible presence of chemotypes). The enantiomeric ratio of essential oil components is a reliable parameter for assessing quality because it may be indicative of adulteration, contamination, aging, shelf life, technological process and the botanical source of a specific chiral compound. ... 

Each cultivar possesses a specific flavonol and dihydroflavonol profile (quantitative and qualitative aspect) that could be used for taxonomic characterization (Mattivi et al. 2006 Masa et al. 2007). It was believed that white cultivars did not contain any methylated flavonol until Rodriguez Montealegre et al. (2006) detected small amounts of isorhamnetin glucoside in their skins. Based on a survey of 91 Vitis vinifera cultivars, Mattivi et al. (2006) concluded that isorhamnetin derivatives are present in small amounts in white cultivars whereas derivatives of myricetin, laricitrin and syringetin appear to be specific of red cultivars. However, myricetin was detected in some white Muscadine cultivars (Vitis rotundifolia sp.) (Talcott and... 

Modification of Nickel Form by Soil Microbial Isolates. Following isolation from soil and in conjunction with taxonomic characterization, pure cultures of bacteria and fungi were grown to stationary phase in the presence of Ni at several concentration levels. The exocellular solution from each culture was separated by filtration (<0.4 and <0.01 jl) and the Ni-associated components characterized using TLC and TLE. 

Natural product extracts and bacterial culture collections do not necessarily work well together on drug discovery platforms. The separation, identification, characterization, scale-up, and purification of natural products for large-scale libraries suitable for these HTS are daunting, and rational arguments for the selection of organisms and/or natural product molecules are often absent, especially given the poor taxonomic characterization of strains in natural product bacterial strain collections. 

The taxonomic characterization of Hemandia was described by Verdcourt [1] as follows ... 

Burger, E, Charrid-Duhaut, A., Connan, I, Flecker, M., Albrecht, P. (2009) Archaeological resinous samples from Asian wrecks taxonomic characterization by GC-MS. Analytica Chimica Acta, 648, 85-97. 

Historically, the selection of microorganisms that produce enzymes has been empirical, starting with samples from very diverse natural sources. Cultures enriched by growth on substrates were used to inoculate fermentations. In a later stage, pure bacterial strains were selected. Intellectual property protections associated with bioprocesses have hampered the taxonomical characterization of industrially used strains. For the same reason, it is not always possible to trace the origin and history of currently used organisms. Once it... 

Most classes of alkaloids have a well established distribution such that they can be used for taxonomic characterization. However, the polyhydroxylated alkaloids have so far been found to be widely distributed, suggesting that, either they have a... 

Included in the table are data for L. scoparium obtained from five sites in Australia. The Australian material exhibited a level of a-pinene approaching that of the northern race from New Zealand, but was clearly characterized by the highest level of 1,8-cineole observed in the study, along with the highest value for total monoterpenes and lowest value for total sesquiterpenes. The authors noted the need for further taxonomic study, particularly of the Australian material. 

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