| paracoccus carotinifaciens sp. nov., a new aerobic gram-negative astaxanthin-producing bacterium. | the strain e-396t, isolated from soil, was gram-negative, aerobic, orange-pigmented, rod-shaped, motile by peritrichous flagella and astaxanthin-producing. this organism produced carotenoids, mainly astaxanthin, and did not produce bacteriochlorophyll. the ubiquinone system was q-10. analysis of the 16s rrna sequence of strain e-396t showed it to be a member of the alpha-3 subclass of the proteobacteria, forming a cluster with the species of the genus paracoccus. on the basis of the production o ... | 1999 | 10028273 |
| paracoccus aestuarii sp. nov., isolated from tidal flat sediment. | a gram-negative micro-organism, designated strain b7(t), was isolated from tidal flat sediment and subjected to a polyphasic taxonomic study involving morphological, physiological, biochemical and 16s rrna gene sequence analyses. a phylogenetic analysis based on the 16s rrna gene sequence indicated that strain b7(t) belonged to the genus paracoccus and was closely related phylogenetically to paracoccus marcusii mh1(t) (97.5 % sequence similarity), paracoccus marinus kkl-a5(t) (97.5 %), paracoccu ... | 2009 | 19329608 |
| biotechnological production of astaxanthin with phaffia rhodozyma/xanthophyllomyces dendrorhous. | the oxygenated β-carotene derivative astaxanthin exhibits outstanding colouring, antioxidative and health-promoting properties and is mainly found in the marine environment. to satisfy the growing demand for this ketocarotenoid in the feed, food and cosmetics industries, there are strong efforts to develop economically viable bioprocesses alternative to the current chemical synthesis. however, up to now, natural astaxanthin from haematococcus pluvialis, phaffia rhodozyma or paracoccus carotinifa ... | 2010 | 21046372 |
| the antianxiety-like effect of astaxanthin extracted from paracoccus carotinifaciens. | astaxanthin is a red carotenoid pigment and is widely found in living organisms. astaxanthin has a potent antioxidative ability and has been reported as having various biological effects on the central nerve system, such as a protective effect against ischemia/reperfusion injury and improvement in cognitive function. in this study, to investigate the effects of astaxanthin on anxiety and depression, we performed some behavioral trials including the elevated plus maze test, hole-board test, force ... | 2010 | 21328624 |
| protective effects of astaxanthin from paracoccus carotinifaciens on murine gastric ulcer models. | the purpose of this study was to investigate the effect of astaxanthin extracted from paracoccus carotinifaciens on gastric mucosal damage in murine gastric ulcer models. mice were pretreated with astaxanthin for 1 h before ulcer induction. gastric ulcers were induced in mice by oral administration of hydrochloride (hcl)/ethanol or acidified aspirin. the effect of astaxanthin on lipid peroxidation in murine stomach homogenates was also evaluated by measuring the level of thiobarbituric acid reac ... | 2011 | 22170791 |
| quorum sensing in marine snow and its possible influence on production of extracellular hydrolytic enzymes in marine snow bacterium pantoea ananatis b9. | marine snow is a continuous shower of organic and inorganic detritus, and plays a crucial role in transporting materials from the sea surface to the deep ocean. the aims of the current study were to identify n-acyl homoserine lactone (ahl)-based quorum sensing (qs) signaling molecules directly from marine snow particles and to investigate the possible regulatory link between qs signals and extracellular hydrolytic enzymes produced by marine snow bacteria. the marine snow samples were collected f ... | 2015 | 25764555 |