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family spirosomaceae: gram-negative ring-forming aerobic bacteria.the bacteria having a unique ring-like morphology first isolated from nasal mucus by weibel in 1887 were classified as a new genus spirosoma by migula in 1894. however, because these bacteria were not completely described for taxonomic purposes and their cultures were no longer available, the genus was deleted from the bergey's manual of determinative bacteriology, 6th edition, 1948. orskov (1928) created a new genus "microcyclus" (a name that has been found to be illegitimate and replaced with ...19902248690
a novel sulfonic-acid analogue of ceramide is the major extractable lipid of the gram-negative marine bacterium cyclobacterium marinus wh.the extractable lipids of the gram-negative, sea-water bacterium cyclobacterium marinus strain wh contain about 94% of polar components which consist of two phospholipids, phosphatidylethanolamine (29% of the total lipids) and phosphatidylcholine (7%), and two phosphorus-free lipids. one of the latter has been shown to be a novel sulfonic-acid analogue of ceramide, 2-d-(2'-d-hydroxy-13'-methyltetradecanoyl) amino-3-d-hydroxy-15-methylhexadec-4 (e)-en-1-sulfonic acid (48%), and other is a lipodip ...19989518560
polyamine distribution profiles in the eighteen genera phylogenetically located within the flavobacterium-flexibacter-cytophaga complex.cellular polyamines of eighteen genera belonging to the flavobacterium-flexibacter-cytophaga complex were analysed by ion exchange liquid chromatography. homospermidine was the major polyamine in the genera bergeyella, riemerella, ornithobacterium, weeksella, capnocytophaga, polaribacter and psychroflexus belonging to the family flavobacteriaceae. in the family spirosomaceae, runella, spirosoma and flectobacillus species contained spermidine whereas cyclobacterium species contained homospermidin ...200111491527
microbial diversity in ikaite tufa columns: an alkaline, cold ecological niche in greenland.ikaite tufa columns from the ikka fjord in south-western greenland constitute a natural, stable environment at low temperature and with a ph ranging from neutral at the exterior to very alkaline (ph 10.4) at the interior of the column. phylogenetic analysis of culturable organisms revealed ten different isolates representing three of the major bacterial divisions. nine of the isolates showed 94-99% similarity to known sequences, whereas one isolate displayed a low degree of similarity (less than ...200212153590
diversity of 746 heterotrophic bacteria isolated from microbial mats from ten antarctic lakes.microbial mats, growing in antarctic lakes constitute unique and very diverse habitats. in these mats microorganisms are confronted with extreme life conditions. we isolated 746 bacterial strains from mats collected from ten lakes in the dry valleys (lakes hoare and fryxell), the vestfold hills (lakes ace, druzhby, grace, highway, pendant, organic and watts) and the larsemann hills (lake reid), using heterotrophic growth conditions. these strains were investigated by fatty acid analysis, and by ...200212583721
algoriphagus ratkowskyi gen. nov., sp. nov., brumimicrobium glaciale gen. nov., sp. nov., cryomorpha ignava gen. nov., sp. nov. and crocinitomix catalasitica gen. nov., sp. nov., novel flavobacteria isolated from various polar habitats.several cold-adapted strains isolated from a variety of algal-rich antarctic and southern ocean samples formed three distinct groups within the class flavobacteria, phylogenetically distant from other cultivated species. the first taxon, designated algoriphagus ratkowskyi gen. nov., sp. nov., was isolated from sea ice and from saline lake cyanobacterial mats and includes non-motile, strictly aerobic, saccharolytic rod-like or serpentine strains that were most closely related to the genus cycloba ...200313130017
belliella baltica gen. nov., sp. nov., a novel marine bacterium of the cytophaga-flavobacterium-bacteroides group isolated from surface water of the central baltic sea.two bacterial isolates from the baltic sea, ba1 and ba134t, were characterized for their physiological and biochemical features, fatty acid profiles and phylogenetic position based on 16s rrna gene sequences. the strains were isolated from surface water of the central baltic sea during the decay of a plankton bloom. phylogenetic analysis of their 16s rrna gene sequences revealed a clear affiliation to the family 'flexibacteriaceae' and showed highest sequence similarity (91%) to cyclobacterium m ...200414742460
hongiella mannitolivorans gen. nov., sp. nov., hongiella halophila sp. nov. and hongiella ornithinivorans sp. nov., isolated from tidal flat sediment.three marine strains of the cytophaga-flavobacterium-bacteroides group, designated jc2050t, jc2051t and jc2052t, were obtained from a single sediment sample of getbol, the korean tidal flat. comparative 16s rdna sequence studies revealed that the test strains were not closely related to any validly published genera and that these strains were only distantly related to the genus cyclobacterium (88.7-91.2%). phylogenetic analyses demonstrated that the three getbol isolates formed a distinct monoph ...200414742474
aquiflexum balticum gen. nov., sp. nov., a novel marine bacterium of the cytophaga-flavobacterium-bacteroides group isolated from surface water of the central baltic sea.a bacterial isolate from the baltic sea, ba160(t), was characterized for its physiological and biochemical features, fatty acid profile, g+c content and phylogenetic position based on 16s rrna gene sequences. the strain was isolated from the surface water of the central baltic sea during the decay of a plankton bloom. phylogenetic analyses of the 16s rrna gene sequence revealed a clear affiliation with the family 'flexibacteraceae', and showed the closest phylogenetic relationship with the speci ...200415545480
cyclobacterium amurskyense sp. nov., a novel marine bacterium isolated from sea water.the taxonomic position of a novel marine, heterotrophic, aerobic, pigmented, non-motile bacterium isolated from sea water was determined. 16s rrna gene sequence analysis revealed that strain kmm 6143t is a member of the genus cyclobacterium. the results of dna-dna hybridization experiments supported by phenotypic and chemotaxonomic data showed that the isolate represents a novel species of the genus cyclobacterium, for which the name cyclobacterium amurskyense sp. nov. is proposed. the type stra ...200516280502
cyclobacterium lianum sp. nov., a marine bacterium isolated from sediment of an oilfield in the south china sea, and emended description of the genus cyclobacterium.the marine bacterial strain hy9(t) was isolated from sediment from the south china sea. strain hy9(t) is aerobic, heterotrophic and rose-pigmented. the cells are non-motile and curved, i.e. ring-like or horseshoe-shaped. the 16s rrna gene sequence of strain hy9(t) was determined and blast searches revealed that it possessed significant sequence similarities with respect to cyclobacterium species (92.8-93.6 %). phylogenetic analysis confirmed that strain hy9(t) was tightly clustered with members ...200617159000
indibacter alkaliphilus gen. nov., sp. nov., an alkaliphilic bacterium isolated from a haloalkaline lake.a novel gram-stain-negative, rod-shaped, non-motile bacterium, strain lw1(t), was isolated from a water sample collected at a depth of 3.5 m from lonar lake, buldhana district, maharashtra, india. the cell suspension was reddish-orange due to the presence of carotenoids. strain lw1(t) was positive for catalase, oxidase, ornithine decarboxylase and lysine decarboxylase and negative for gelatinase, urease and lipase. fatty acids were dominated by branched-chain fatty acids (>76 %), with a high abu ...201020371870
cyclobacterium qasimii sp. nov., a psychrotolerant bacterium isolated from a marine sediment of kongsfjorden, svalbard.a novel gram-staining-negative, horseshoe shaped, non-motile bacterium, designated strain m12-11bt, was isolated from a marine sediment sample collected at a depth of 200 m from kongsfjorden, svalbard. the colony color was orangish-red due to the presence of carotenoids. the fatty acids were dominated by unsaturated fatty acids (60%), with a high abundance of c16 : 1 ω9c (30%) and c16 : 1ω11c (30%) and the other major fatty acids include anteiso-c14 : 0 (17.7%) and c15 : 0 (22%). strain m12-11bt ...201120601487
cyclobacterium qasimii sp. nov., a psychrotolerant bacterium isolated from a marine sediment of kongsfjorden, svalbard. 201121742858
indibacter alkaliphilus gen. nov., sp. nov., a novel alkaliphilic bacterium isolated from haloalkaline lonar lake, india.a novel gram-negative, rod shaped, non-motile bacterium, strain lw1t, was isolated from a water sample collected at a depth of 3.5 m from the lonar lake of buldhana district, maharastra, india. the cell suspension was reddish-orange due to the presence of carotenoids. cells of the strain lw1t are positive for catalase, oxidase, ornithine decarboxylase and lysine decarboxylase and negative for gelatinase, urease and lipase. the fatty acids were dominated by branched-chain fatty acids (>76 %), wit ...200919656931
contributing carbohydrate catabolic pathways in cyclobacterium marinus.the primary and secondary pathways of carbohydrate metabolism were determined in a nonfermentative gram-negative ring-forming marine bacterium, cyclobacterium marinus, by radiorespirometric studies. whereas glucose is oxidized mainly via the embden-meyerhof pathway, gluconate is catabolized mainly via the entner-doudoroff pathway, both in conjunction with the tricarboxylic acid cycle as a secondary pathway and with some participation of the pentose phosphate pathway. the operation of these contr ...19836848485
cyclobacterium qasimii sp. nov., a psychrotolerant bacterium isolated from a marine sediment of kongsfjorden, svalbard.a novel gram-stain-negative, horseshoe shaped, non-motile bacterium, designated strain m12-11bt, was isolated from a marine sediment sample collected at a depth of 200 m from kongsfjorden, svalbard. the colony color was orangish-red due to the presence of carotenoids. the fatty acids were dominated by branched and unsaturated fatty acids (90.8%), with a high abundance of iso-c15 : 0 (14.9%), anteiso-c15 : 0 (11.4), iso-c15 : 1 g (13.1), c15 : 1 ω6c (5.4), c17 : 1 ω6c (6.7), summed feature 3 (9.3 ...201122039004
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