| dietzia natronolimnaios sp. nov., a new member of the genus dietzia isolated from an east african soda lake. | two novel alkaliphilic aerobic organotrophic bacteria have been isolated from a moderately saline and alkaline east african soda lake. the new isolates grow at ph values between 6 and 10, with a ph optimum for growth of 9.0, and at a salt concentration between 0% and 10% (w/v). phylogenetic analysis based on 16s rdna sequence shows that these isolates are very closely related (99.6% similarity) and are members of the monospecific genus dietzia (98.8% and 98.7% similarity). dna/dna hybridization ... | 1998 | 9783184 |
| dietzia psychralcaliphila sp. nov., a novel, facultatively psychrophilic alkaliphile that grows on hydrocarbons. | a novel, facultatively psychrophilic alkaliphile that grows on a chemically defined medium containing n-alkanes as the sole carbon source was isolated from a drain of a fish product-processing plant. the isolate was an aerobic, non-motile, gram-positive bacterium. the bacterium was catalase-positive and oxidase-negative. the cell wall contained meso-diaminopimelic acid, arabinose and galactose; the glycan moiety of the cell wall contained acetyl residues. the g+c content of the dna was 69.6 mol ... | 2002 | 11837320 |
| dietzia kunjamensis sp. nov., isolated from the indian himalayas. | a coral-red-pigmented actinobacterium, strain k30-10(t), was isolated from a soil sample from a cold desert of the indian himalayas. chemical and phenotypic properties of strain k30-10(t) were consistent with its classification in the genus dietzia. it showed 97.9 % 16s rrna gene sequence similarity to dietzia maris mtcc 7011(t); similarities to the type strains of three other species of the genus, dietzia natronolimnaea, dietzia psychralcaliphila and dietzia cinnamea, were 94.4-96.0 %. the dna- ... | 2006 | 16825647 |
| effect of culture conditions on canthaxanthin production by dietzia natronolimnaea hs-1. | this study investigated the effects of various culture parameters (carbon sources, temperature, initial ph of culture, nacl concentration, and light) on the growth and canthaxanthin production by dietzia natronolimnaea hs-1. the results showed that the most effective carbon source for growth and canthaxantin production was glucose, and the best ph and temperature were 7 and 31 degrees c, respectively. in addition, the biomass and canthaxanthin production increased in a medium without nacl and in ... | 2007 | 18051749 |
| dietzia schimae sp. nov. and dietzia cercidiphylli sp. nov., from surface-sterilized plant tissues. | two actinobacterial strains, yim 65001(t) and yim 65002(t), were isolated from surface-sterilized plant tissues collected from yunnan province, south-west china, and their taxonomic positions were determined by using a polyphasic approach. the dna g+c contents of strains yim 65001(t) and yim 65002(t) were 71.9 and 72.6 mol%, respectively. the two strains had chemotaxonomic markers that were consistent with their classification in the genus dietzia. phylogenetic analysis based on almost-complete ... | 2008 | 18984691 |
| optimization of canthaxanthin production by dietzia natronolimnaea hs-1 using response surface methodology. | sequential methodology combining a screening stage by fractional factorial design and an optimization stage by central composite design was applied to enhance canthaxanthin production of dietzia natronolimnaea hs-1 in shake flask cultures. five variables (ph, luminous intensity, inoculum percent, concentration of glucose and concentration of nacl) were studied with the first design and the results revealed that three factors (ph, concentration of glucose and concentration of nacl) had greater in ... | 2007 | 19070128 |
| identification of atypical rhodococcus-like clinical isolates as dietzia spp. by 16s rrna gene sequencing. | rhodococcus equi and dietzia spp. are closely related actinomycetes that show similar phenotypic properties. in humans, r. equi is an opportunistic pathogen associated with severe immunodeficiency. dietzia spp. are environmental bacteria that have been isolated recently from clinical material and are presumptively associated with human infections. during the last 5 years, 15 bacterial isolates from human clinical samples collected at the hospital marqués de valdecilla, santander, spain, were ide ... | 2010 | 20220156 |
| use of response surface methodology in a fed-batch process for optimization of tricarboxylic acid cycle intermediates to achieve high levels of canthaxanthin from dietzia natronolimnaea hs-1. | in this work, we applied statistical experimental design to a fed-batch process for optimization of tricarboxylic acid cycle (tca) intermediates in order to achieve high-level production of canthaxanthin from dietzia natronolimnaea hs-1 cultured in beet molasses. a fractional factorial design (screening test) was first conducted on five tca cycle intermediates. out of the five tca cycle intermediates investigated via screening tests, alfaketoglutarate, oxaloacetate and succinate were selected ba ... | 2010 | 20226378 |
| psyllium husk gum: an attractive carbohydrate biopolymer for the production of stable canthaxanthin emulsions. | the physical stability of the ultrasonically prepared emulsions containing canthaxanthin (cx) produced by dietzia natronolimnaea hs-1 strain was maximized using a face central composite design (fccd) of response surface methodology (rsm). the linear and interaction effects of main emulsion components (whey protein isolate (wpi, 0.4-1.2 wt%), psyllium husk gum (phg, 1.5-4.5 wt%) and coconut oil (co, 5-10 wt%)) on the stability were studied. the density, turbidity and droplet size of emulsions wer ... | 2012 | 23399251 |
| identification of dietzia spp. from cardiac tissue by 16s rrna pcr in a patient with culture-negative device-associated endocarditis: a case report and review of the literature. | the genus dietzia was recently distinguished from other actinomycetes such as rhodococcus. while these organisms are known to be distributed widely in the environment, over the past decade several novel species have been described and isolated from human clinical specimens. here we describe the identification of dietzia natronolimnaea/d. cercidiphylli by pcr amplification and sequencing of the 16s rrna encoding gene from cardiac tissue in a patient with culture-negative device-associated endocar ... | 2016 | 28101387 |
| proniosomal powders of natural canthaxanthin: preparation and characterization. | in this study, canthaxanthin (ctx) was produced by dietzia natronolimnaea hs-1 using beetroot molasses as substrate and used for encapsulation in proniosome powders after extraction, with the aim of improving its stability. proniosome powders were prepared with an equimolar ratio of span 60/cholesterol and four different carriers, namely maltodextrin, mannitol, lactose and pullulan. the properties of these formulations as both proniosomal powders and resulted niosomal dispersions were evaluated. ... | 2017 | 27855894 |
| plant growth promoting rhizobacteria dietzia natronolimnaea modulates the expression of stress responsive genes providing protection of wheat from salinity stress. | plant growth promoting rhizobacteria (pgpr) hold promising future for sustainable agriculture. here, we demonstrate a carotenoid producing halotolerant pgpr dietzia natronolimnaea str1 protecting wheat plants from salt stress by modulating the transcriptional machinery responsible for salinity tolerance in plants. the expression studies confirmed the involvement of aba-signalling cascade, as taabare and taopr1 were upregulated in pgpr inoculated plants leading to induction of tamyb and tawrky ex ... | 2016 | 27708387 |
| canthaxanthin biosynthesis by dietzia natronolimnaea hs-1: effects of inoculation and aeration rate. | the interest in production of natural colorants by microbial fermentation has been currently increased. the effects of d-glucose concentration (3.18-36.82 g/l), inoculum size (12.5 × 10(9)-49.5 × 10(9) cfu cells/ml) and air-flow rate (1.95-12.05 l/l min) on the biomass, total carotenoid and canthaxanthin (ctx) accumulation of dietzia natronolimnaea hs-1 in a batch bioreactor was scrutinized using a response surface methodology-central composite rotatable design (rsm-ccrd). second-order polynomia ... | 2014 | 25242927 |
| stabilization of canthaxanthin produced by dietzia natronolimnaea hs-1 with spray drying microencapsulation. | the strain bacterium dietzia natronolimnaea has propounded as a source for biological production of canthaxanthin. because of sensitivity of this pigment, examine on its stability is important. in this study, stability of encapsulated canthaxanthin from d. natronolimnaea hs-1 using soluble soybean polysaccharide (ssps), gum acacia (ga), and maltodextrin (md) as wall materials was investigated at 4, 25, and 45 °c in light and dark conditions during 4 months of storage. it was shown that the type ... | 2014 | 25190874 |
| successful startup of a full-scale acrylonitrile wastewater biological treatment plant (acn-wwtp) by eliminating the inhibitory effects of toxic compounds on nitrification. | during the startup of a full-scale anoxic/aerobic (a/o) biological treatment plant for acrylonitrile wastewater, the removal efficiencies of nh(3)-n and total kjeldahl nitrogen (tkn) were 1.29 and 0.83% on day 30, respectively. the nitrification process was almost totally inhibited, which was mainly caused by the inhibitory effects of toxic compounds. to eliminate the inhibition, cultivating the bacteria that degrade toxic compounds with patience was applied into the second startup of the biolog ... | 2014 | 24552727 |
| feeding strategies for the improved biosynthesis of canthaxanthin from enzymatic hydrolyzed molasses in the fed-batch fermentation of dietzia natronolimnaea hs-1. | the effect of two enzymatic hydrolyzed molasses (ehm)-feeding strategies including constant-(cfr) and exponential-(efr) feeding rate on canthaxanthin (ctx) biosynthesis by dietzia natronolimnaea hs-1 fed-batch fermentation was studied. the results showed that the cfr of 7 ml/h with an ehm content of 45 g/l led to the highest values of specific growth rate (0.127 h(-1)), biomass dry weight (17.66 g/l), total carotenoid (16.31 mg/l) and ctx (14.67 mg/l). a significant decrease in the kinetic growt ... | 2014 | 24384310 |
| characterizing the natural canthaxanthin/2-hydroxypropyl-β-cyclodextrin inclusion complex. | a fundamental study on the phase-solubility, storage stability and antioxidant activity of the inclusion complex of 2-hydroxypropyl-β-cyclodextrin (hp-β-cd) with canthaxanthin (ctx) biosynthesized by dietzia natronolimnaea hs-1 in a continuous bioreactor was designed. a variety of in vitro chemical methods including reducing power (rp), nitrite-scavenging activity (nsa), and 1,1-diphenyl-2-picryl-hydrazyl (dpph), 2,2'-azinobis-3-ethylbenzothiazoline-6-sulphonic acid (abts) and hydroxyl radicals ... | 2014 | 24299886 |
| the effect of microdosimetric 12c6+ heavy ion irradiation and mg2+ on canthaxanthin production in a novel strain of dietzia natronolimnaea. | dietzia natronolimnaea is one of the most important bacterial bioresources for high efficiency canthaxanthin production. it produces the robust and stable pigment canthaxanthin, which is of special interest for the development of integrated biorefineries. mutagenesis employing 12c6+ irradiation is a novel technique commonly used to improve microorganism productivity. this study presents a promising route to obtaining the highest feasible levels of biomass dry weight (bdw), and total canthaxanthi ... | 2013 | 24074304 |
| ultrasound-assisted formation of the canthaxanthin emulsions stabilized by arabic and xanthan gums. | there is interest in incorporating canthaxanthin (ctx) into food emulsions due to its high potential health benefits. the used ctx in this study was produced by the bacterium of dietzia natronolimnaea hs-1. then, the influence of main emulsion components (gum arabic (ga), xanthan gum (xg) and coconut oil (co)) on the surface-weighted mean diameter (d32), polydispersity index (pdi), specific surface area (ssa) of droplets and density of the emulsions containing ctx was optimized using response su ... | 2013 | 23688450 |
| developing an emulsion model system containing canthaxanthin biosynthesized by dietzia natronolimnaea hs-1. | an acceptable strategy to incorporate canthaxanthin (cx) as a natural colorant into products is by means of oil-in-water emulsions. the used cx in this study was produced by bacterium dietzia natronolimnaea hs-1 using a batch bioreactor system. a central composite rotatable design-response surface methodology (ccrd-rsm) consisting of three-factored factorial design with five levels was applied for analysis of the results to obtain the optimal formulation of emulsions. three independent variables ... | 2012 | 22750576 |
| biodegradation of aniline in an alkaline environment by a novel strain of the halophilic bacterium, dietzia natronolimnaea jq-an. | dietzia natronolimnaea jq-an was isolated from industrial wastewater containing aniline. under aerobic conditions, the jq-an strain degraded 87% of the aniline in a 300 mg l(-1) aniline solution after 120 h of shake flask incubation in a medium containing sodium acetate. this strain had an unusually high salinity tolerance in minimal medium (0-6% nacl, w/v). the optimal ph for microbial growth and aniline biodegradation was ph 8.0. two liters of simulated aniline wastewater was created in a reac ... | 2012 | 22613890 |