Results 141 to 150 of about 8,608 (200)
Some of the next articles are maybe not open access.
Acta Odontologica Scandinavica, 1990
The present review deals with chemotaxonomic methods for yeasts. DNA base composition, which is expressed as molar percentages of guanine plus cytosine (G + C), is fitted for description of a new species and serves exclusionary functions. G + C content range among species within a genus is often 10% or less.
openaire +2 more sources
The present review deals with chemotaxonomic methods for yeasts. DNA base composition, which is expressed as molar percentages of guanine plus cytosine (G + C), is fitted for description of a new species and serves exclusionary functions. G + C content range among species within a genus is often 10% or less.
openaire +2 more sources
Phytochemistry, 1972
Abstract The heartwoods of 10 elm species have been examined for the sesquiterpenes, 7-hydroxycadalenal (I), 7-hydroxy-3-methoxycadalenal (II), 7-hydroxycadalene (III), 7-hydroxycalamenenal (IV), 7-hydroxycalamenene (V), and mansonone C (VI), and for the lignans, thomasic acid (VII), thomasidioic acid (VIII), lyoniresinol (IX), and lyoniresinol 2a- O
J.W. Rowe +3 more
openaire +1 more source
Abstract The heartwoods of 10 elm species have been examined for the sesquiterpenes, 7-hydroxycadalenal (I), 7-hydroxy-3-methoxycadalenal (II), 7-hydroxycadalene (III), 7-hydroxycalamenenal (IV), 7-hydroxycalamenene (V), and mansonone C (VI), and for the lignans, thomasic acid (VII), thomasidioic acid (VIII), lyoniresinol (IX), and lyoniresinol 2a- O
J.W. Rowe +3 more
openaire +1 more source
Chemotaxonomy of cyanobacteria
Phytochemistry, 1995Abstract The fatty acid-based classification system divides cyanobacteria into four groups. These groups include strains that contain C 18 fatty acids with three, four or no double bonds. The fatty acid composition of several cyanobacterial strains that we have analysed suggests the existence of a fifth group that consists of C 18 polyunsaturated ...
Zvi Cohen +2 more
openaire +1 more source
Biochemical Systematics and Ecology, 1975
Abstract The composition of the uropygial gland wax of 8 species of birds of the order Anseriformes was investigated. As was expected, the waxes are composed of more or less methyl-branched fatty acids and alcohols. The results obtained have been compared with those on other species of Anseriformes and discussed from a chemotaxonomical viewpoint. For
Jürgen Jacob, Armin Glaser
openaire +1 more source
Abstract The composition of the uropygial gland wax of 8 species of birds of the order Anseriformes was investigated. As was expected, the waxes are composed of more or less methyl-branched fatty acids and alcohols. The results obtained have been compared with those on other species of Anseriformes and discussed from a chemotaxonomical viewpoint. For
Jürgen Jacob, Armin Glaser
openaire +1 more source
Chemotaxonomy of bacteroides: A review
Acta Odontologica Scandinavica, 1994The loose definition of Bacteroides, some species of which are important etiologic agents of oral diseases, has enabled isolates with only marginal similarities to be reposited in this genus. Many attempts have been made over the years to improve the taxonomy of this heterogeneous group of bacteria.
openaire +2 more sources
Botanical Journal of the Linnean Society, 1973
The species of Geranium show a wide range of flavonoid pattern, from one in which ail the regular (primitive) constituents are present to one where only quercetin and kaempferol are present. The primitive pattern predominates in the central Eurasian area, radiating eastward and westward from which the flavonoid constituents become progressivley ...
openaire +1 more source
The species of Geranium show a wide range of flavonoid pattern, from one in which ail the regular (primitive) constituents are present to one where only quercetin and kaempferol are present. The primitive pattern predominates in the central Eurasian area, radiating eastward and westward from which the flavonoid constituents become progressivley ...
openaire +1 more source
Biochemical Systematics and Ecology, 2015
Abstract The order Ericales, sensu APG III, belongs to the Asterids. It comprises around 25 families and 347 genera distributed in 4 clades: Balsaminoids, Polemonioids, Primuloids and Ericoids. Their species are widely distributed in arctic, temperate and tropical regions.
Marco Eduardo do Nascimento Rocha +4 more
openaire +1 more source
Abstract The order Ericales, sensu APG III, belongs to the Asterids. It comprises around 25 families and 347 genera distributed in 4 clades: Balsaminoids, Polemonioids, Primuloids and Ericoids. Their species are widely distributed in arctic, temperate and tropical regions.
Marco Eduardo do Nascimento Rocha +4 more
openaire +1 more source
Phytochemistry, 1999
A chemotaxonomical study of the genus Taxus was undertaken, based on the concentration of six neutral taxanes in its needles. A total of 750 different samples from 10 different Taxus species or hybrids were analysed. The chemical data were processed by Cluster and Principal Component Analysis.
van Rozendaal, E.L.M. +3 more
openaire +2 more sources
A chemotaxonomical study of the genus Taxus was undertaken, based on the concentration of six neutral taxanes in its needles. A total of 750 different samples from 10 different Taxus species or hybrids were analysed. The chemical data were processed by Cluster and Principal Component Analysis.
van Rozendaal, E.L.M. +3 more
openaire +2 more sources
1994
Using FAME profiles we have demonstrated the inter-species differentiation of certain members of the spirochaete family- Leptospira, Serpulina and Borrelia species. Now we propose that intra-species differentiation of Borrelia species is possible using this phenotypic method. The delineation of B. burgdorferi into B.
M. Anne Livesley, Patricia A. Nuttall
openaire +1 more source
Using FAME profiles we have demonstrated the inter-species differentiation of certain members of the spirochaete family- Leptospira, Serpulina and Borrelia species. Now we propose that intra-species differentiation of Borrelia species is possible using this phenotypic method. The delineation of B. burgdorferi into B.
M. Anne Livesley, Patricia A. Nuttall
openaire +1 more source
TAXON, 1972
SummaryThe use of chemical characteristics in plant taxonomy is briefly surveyed. Some types of numerical treatment of variation in chromatographically separated substances are discussed. The usefulness of such methods is shown to be more restricted than is often claimed.
openaire +1 more source
SummaryThe use of chemical characteristics in plant taxonomy is briefly surveyed. Some types of numerical treatment of variation in chromatographically separated substances are discussed. The usefulness of such methods is shown to be more restricted than is often claimed.
openaire +1 more source