Tomas Rezanka

Summary

Affiliation: Academy of Sciences of the Czech Republic
Country: Czech Republic

Publications

  1. doi Microbial transformation of synthetic estrogen 17alpha-ethinylestradiol
    Tomas Cajthaml
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, CZ 142 20 Prague 4, Czech Republic
    Environ Pollut 157:3325-35. 2009
  2. ncbi Unusual medium-chain polyunsaturated fatty acids from the snow alga Chloromonas brevispina
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic
    Microbiol Res 163:373-9. 2008
  3. ncbi Relationship between volatile odorous substances and production of avermectins by Streptomyces avermitilis
    T Rezanka
    Institute ofMicrobiology, Academy of Sciences of the Czech Republic, 142 20 Prague
    Folia Microbiol (Praha) 52:26-30. 2007
  4. ncbi Identification of astaxanthin diglucoside diesters from snow alga Chlamydomonas nivalis by liquid chromatography-atmospheric pressure chemical ionization mass spectrometry
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 142 20 Prague, Czech Republic
    Phytochemistry 69:479-90. 2008
  5. ncbi Structural analysis of a polysaccharide from Chlorella kessleri by means of gas chromatography-mass spectrometry of its saccharide alditols
    T Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, 142 20 Prague, Czechia
    Folia Microbiol (Praha) 52:246-52. 2007
  6. doi Regioisomeric and enantiomeric analysis of triacylglycerols
    Tomas Rezanka
    Institute of Microbiology, CAS, Videnska 1083, 142 20, Prague, Czech Republic Electronic address
    Anal Biochem . 2016
  7. doi Enantiomeric separation of triacylglycerols containing polyunsaturated fatty acids with 18 carbon atoms
    Tomas Rezanka
    Institute of Microbiology, CAS, Videnska 1083, 142 20 Prague, Czech Republic Electronic address
    J Chromatogr A 1467:261-269. 2016
  8. doi Lipidomic analysis of psychrophilic yeasts cultivated at different temperatures
    Tomas Rezanka
    Institute of Microbiology, Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic Electronic address
    Biochim Biophys Acta 1861:1634-1642. 2016
  9. doi Separation and Identification of Odd Chain Triacylglycerols of the Protozoan Khawkinea quartana and the Mold Mortierella alpina Using LC-MS
    Tomas Rezanka
    Institute of Microbiology, CAS, Videnska 1083, 142 20, Prague, Czech Republic
    Lipids 50:811-20. 2015
  10. doi Wax Ester Analysis of Bats Suffering from White Nose Syndrome in Europe
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 142 20, Prague 4, Czech Republic
    Lipids 50:633-45. 2015

Collaborators

Detail Information

Publications81

  1. doi Microbial transformation of synthetic estrogen 17alpha-ethinylestradiol
    Tomas Cajthaml
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, CZ 142 20 Prague 4, Czech Republic
    Environ Pollut 157:3325-35. 2009
    ....
  2. ncbi Unusual medium-chain polyunsaturated fatty acids from the snow alga Chloromonas brevispina
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic
    Microbiol Res 163:373-9. 2008
    ..Our report appears to be the first to describe the presence of short- and medium-chain PUFAs in green psychrophilic algae of the genus Chloromonas...
  3. ncbi Relationship between volatile odorous substances and production of avermectins by Streptomyces avermitilis
    T Rezanka
    Institute ofMicrobiology, Academy of Sciences of the Czech Republic, 142 20 Prague
    Folia Microbiol (Praha) 52:26-30. 2007
    ..Subsequently, the production dropped below a measurable level. This can be explained as being due to the inhibition of oxolone production by geosmin...
  4. ncbi Identification of astaxanthin diglucoside diesters from snow alga Chlamydomonas nivalis by liquid chromatography-atmospheric pressure chemical ionization mass spectrometry
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 142 20 Prague, Czech Republic
    Phytochemistry 69:479-90. 2008
    ..The astaxanthin diglucoside diester, i.e. (all-E)-[di-(6-O-oleoyl-beta-D-glucopyranosyloxy)]-astaxanthin, was also synthesized to unambiguously confirm its structure...
  5. ncbi Structural analysis of a polysaccharide from Chlorella kessleri by means of gas chromatography-mass spectrometry of its saccharide alditols
    T Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, 142 20 Prague, Czechia
    Folia Microbiol (Praha) 52:246-52. 2007
    ..1H- and 13C-NMR was employed to assess the configuration of glycosidic bonds and individual monosaccharides were assigned to the L or D series by means of gas chromatography of the acetylated (S)-2-butyl glycosides...
  6. doi Regioisomeric and enantiomeric analysis of triacylglycerols
    Tomas Rezanka
    Institute of Microbiology, CAS, Videnska 1083, 142 20, Prague, Czech Republic Electronic address
    Anal Biochem . 2016
    ..Details of mass spectrometry of triacylglycerols are also described, especially the identification of important triacylglycerol ions such as [M + H-RCOOH]+ in atmospheric pressure chemical ionization mass spectra...
  7. doi Enantiomeric separation of triacylglycerols containing polyunsaturated fatty acids with 18 carbon atoms
    Tomas Rezanka
    Institute of Microbiology, CAS, Videnska 1083, 142 20 Prague, Czech Republic Electronic address
    J Chromatogr A 1467:261-269. 2016
    ..5 to 60‰. The ratio of regioisomers and enantiomers was found to change with increasing salinity of the culture medium. This can be explained by variable activity of acyltransferases in cells exposed to salt stress...
  8. doi Lipidomic analysis of psychrophilic yeasts cultivated at different temperatures
    Tomas Rezanka
    Institute of Microbiology, Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic Electronic address
    Biochim Biophys Acta 1861:1634-1642. 2016
    ....
  9. doi Separation and Identification of Odd Chain Triacylglycerols of the Protozoan Khawkinea quartana and the Mold Mortierella alpina Using LC-MS
    Tomas Rezanka
    Institute of Microbiology, CAS, Videnska 1083, 142 20, Prague, Czech Republic
    Lipids 50:811-20. 2015
    ..It was proved that even numbered TAG are synthesized in a higher optical purity, which can be explained by a higher affinity of acyltransferases to the respective substrate, i.e., to even chain PUFA. ..
  10. doi Wax Ester Analysis of Bats Suffering from White Nose Syndrome in Europe
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 142 20, Prague 4, Czech Republic
    Lipids 50:633-45. 2015
    ..Fatty alcohols were fully saturated, dominated by species containing 24, 25, or 26 carbon atoms. Two WE species, 18:1/18:0 and 18:1/20:0, were more abundant in healthy bats than in infected ones. ..
  11. doi Precursor directed biosynthesis of odd-numbered fatty acids by different yeasts
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 142 20, Prague, Czech Republic
    Folia Microbiol (Praha) 60:457-64. 2015
    ..Principal component analysis was used for identifying the effect of cultivation conditions on the production of the 17:1 acid by individual yeast strains...
  12. doi Extraction of brewer's yeasts using different methods of cell disruption for practical biodiesel production
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 142 20, Prague, Czech Republic
    Folia Microbiol (Praha) 60:225-34. 2015
    ..All 49 samples (7 breweries and 7 methods) meet the requirements for biodiesel quality in both the composition of fatty acids and the properties of the biofuel required by the US and EU standards. ..
  13. doi Temperature dependence of production of structured triacylglycerols in the alga Trachydiscus minutus
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 142 20 Prague, Czech Republic Electronic address
    Phytochemistry 110:37-45. 2015
    ..The ratio of regioisomers and enantiomers of triacylglycerols (TAG) depends on the temperature of cultivation; with lowering temperature the proportion of the achiral TAG increases and the enantiomer ratio diverges from 1:1. ..
  14. doi Separation of enantiomeric triacylglycerols by chiral-phase HPLC
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 14220, Prague, Czech Republic
    Lipids 49:1251-60. 2014
    ....
  15. doi Production of structured triacylglycerols from microalgae
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, CZ 142 20 Prague 4, Czech Republic Electronic address
    Phytochemistry 104:95-104. 2014
    ..e. PAP or APA, irrespective of their taxonomical classification. Nitrogen and phosphorus starvation consistently reversed the ratio of asymmetrical and symmetrical TAGs. ..
  16. doi Lipidomic profiling of snow algae by ESI-MS and silver-LC/APCI-MS
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 142 20 Prague, Czech Republic Electronic address
    Phytochemistry 100:34-42. 2014
    ..Since more detailed studies in this field have been stymied by the shortage of 16:3 and 16:4 FAs, we decided to study the alga Chloromonas as a potential biotechnological source of C16 PUFAs. ..
  17. doi Identification of plasmalogen cardiolipins from Pectinatus by liquid chromatography-high resolution electrospray ionization tandem mass spectrometry
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 14220, Prague, Czech Republic
    Lipids 48:1237-51. 2013
    ..The high resolution mass spectrometry allowed the unambiguous structural assignment of Ptd2Gro, PlsPtd2Gro, and Pls2Ptd2Gro in the three species of Pectinatus, which contain predominantly odd numbered fatty acids...
  18. doi LC-MS/APCI identification of glucoside esters and diesters of astaxanthin from the snow alga Chlamydomonas nivalis including their optical stereoisomers
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 142 20 Prague, Czech Republic
    Phytochemistry 88:34-42. 2013
    ..Furthermore, algae from the Pirin Mountains differed in the dominance of astaxanthin diglucoside diesters, suggesting an alternative strategy to enhance cell viability at low temperatures...
  19. doi Biosynthesis and metabolic pathways of pivalic acid
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 14220 Prague, Czech Republic
    Appl Microbiol Biotechnol 95:1371-6. 2012
    ..e., compounds whose catabolism is well known...
  20. doi Lipidomic analysis of bacterial plasmalogens
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 14220 Prague 4, Czech Republic
    Folia Microbiol (Praha) 57:463-72. 2012
    ..This paper describes direct analyses of plasmalogens from natural sources, frequently very unusual, using electrospray ionization mass spectrometry in combination with high-performance liquid chromatography and/or shotgun lipidomics...
  21. doi LC-ESI-MS/MS identification of polar lipids of two thermophilic Anoxybacillus bacteria containing a unique lipid pattern
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 142 20, Prague, Czech Republic
    Lipids 47:729-39. 2012
    ..rupiensis were identified. Five classes of unidentified polar lipids were detected in both strains. Plasmalogens were thus determined for the first time in a facultatively anaerobic bacterium, i.e. A. bogrovensis...
  22. doi Regioisomer separation and identification of triacylglycerols containing vaccenic and oleic acids, and α- and γ-linolenic acids, in thermophilic cyanobacteria Mastigocladus laminosus and Tolypothrix sp
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, CZ 142 20 Prague 4, Czech Republic
    Phytochemistry 78:147-55. 2012
    ..Individual strains of both cyanobacteria exhibited different contents of polyunsaturated fatty acids (Tolypothrix sp.) and different distribution of positional isomers of monoenoic fatty acids in TAGs (M. laminosus)...
  23. doi A biaryl xanthone derivative having axial chirality from Penicillium vinaceum
    Tomas Rezanka
    Institute of Microbiology, Prague, Czech Republic
    J Nat Prod 71:820-3. 2008
    ..The compound gave positive results in a sea urchin egg test ( Paracentrotus lividus) and a crown gall tumor on potato disks test (Agrobacterium tumefaciens)...
  24. doi Identification of odorous compounds from nine fermentor-cultivated Streptomyces strains
    T Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague, Czechia
    Folia Microbiol (Praha) 53:315-8. 2008
    ..The main components of the odor spectrum were geosmin and unique homologues of oxolones (dihydrofuranones), minor compounds included, e.g., pyrazine derivatives, acetoin and its homologues, aromatic esters, furan derivatives...
  25. doi Identification of very-long-chain polyunsaturated fatty acids from Amphidinium carterae by atmospheric pressure chemical ionization liquid chromatography-mass spectroscopy
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 142 20 Prague, Czech Republic
    Phytochemistry 69:2391-9. 2008
    ..Two acids, 36:7n-6 and 36:8n-3, were also synthesized to unambiguously confirm their structure. The possibilities of VLCPUFAs biosynthesis are proposed...
  26. ncbi Novel brominated lipidic compounds from lichens of central Asia
    T Rezanka
    Institute of Microbiology, Academy of Sciences of Czech Republic, Prague
    Phytochemistry 51:963-8. 1999
    ..The compounds, predominantly fatty acid derivatives with unique groups (bromine, cyclopropane, oxirane) and conjugated double and triple bonds, were identified by means of 1H and 13C-NMR, MS, IR and UV spectra...
  27. doi Odd-numbered very-long-chain polyunsaturated fatty acids from the dinoflagellate Amphidinium carterae identified by atmospheric pressure chemical ionization liquid chromatography-mass spectrometry
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 142 20 Prague, Czech Republic
    Phytochemistry 69:2849-55. 2008
    ..Possible biosynthetic pathways for odd VLCPUFAs are also proposed...
  28. doi Odd-numbered very-long-chain fatty acids from the microbial, animal and plant kingdoms
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 142 20 Prague, Czech Republic
    Prog Lipid Res 48:206-38. 2009
    ..It should provide an impetus for further research into these very interesting compounds whose chemical, biochemical and biological properties are poorly known...
  29. doi Identification of (S)-11-cycloheptyl-4-methylundecanoic acid in acylphosphatidylglycerol from Alicyclobacillus acidoterrestris
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, Prague, Czech Republic
    Chem Phys Lipids 159:104-13. 2009
    ..According to feeding experiments with (13)C-labeled propionate, the C(3) internal unit (branched methyl) of brc19:0 is assembled from propionate and not from methionine...
  30. doi Glycosides of arylnaphthalene lignans from Acanthus mollis having axial chirality
    Tomas Rezanka
    Institute of Microbiology, Videnska 1083, Prague 142 20, Czech Republic
    Phytochemistry 70:1049-54. 2009
    ..Two mono- and one tetraglycoside gave positive results in the sea urchin eggs test (Paracentrotus lividus) of cytotoxicity and in a crown gall tumor on potato disks test (Agrobacterium tumefaciens)...
  31. doi Direct ESI-MS analysis of O-acyl glycosylated cardiolipins from the thermophilic bacterium Alicyclobacillus acidoterrestris
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 142 20 Prague, Czech Republic
    Chem Phys Lipids 161:115-21. 2009
    ....
  32. doi Glycosides of benzodioxole-indole alkaloids from Narcissus having axial chirality
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 14220 Prague, Czech Republic
    Phytochemistry 71:301-6. 2010
    ....
  33. doi RP-HPLC/MS-APCI analysis of odd-chain TAGs from Rhodococcus erythropolis including some regioisomers
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, Prague, Czech Republic
    Chem Phys Lipids 163:373-80. 2010
    ..0 to 7.1% while in cultivation on phenol as a carbon source the lowering of cultivation temperature caused an increase of these TAGs from 0.5 to 6.7%...
  34. doi Trachydiscus minutus, a new biotechnological source of eicosapentaenoic acid
    T Rezanka
    Institute of Microbiology v v i, Academy of Sciences of the Czech Republic, 142 20, Prague, Czech Republic
    Folia Microbiol (Praha) 55:265-9. 2010
    ..e. eicosapentaenoic (EPA), was in excess of 35 % of total fatty acids; the productivity was thus 88 mg/L per d. This result makes the alga a very prospective organism that may serve as a new biotechnological source of single cell oil...
  35. doi Pilot-plant cultivation of Streptomyces griseus producing homologues of nonactin by precursor-directed biosynthesis and their identification by LC/MS-ESI
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic
    J Antibiot (Tokyo) 63:524-9. 2010
    ..The total production of the homologues was lowered but their spectrum was shifted to higher-molecular-weight compounds...
  36. doi N-acylated bacteriohopanehexol-mannosamides from the thermophilic bacterium Alicyclobacillus acidoterrestris
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 142 20, Prague, Czech Republic
    Lipids 46:249-61. 2011
    ..On the basis of all the above methods, we identified the full structure of a new class of bacteriohopanes, represented by various N-acylated bacteriohopanehexol-mannosamides...
  37. doi Pivalic acid acts as a starter unit in a fatty acid and antibiotic biosynthetic pathway in Alicyclobacillus, Rhodococcus and Streptomyces
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 142 20 Prague, Czech Republic
    Environ Microbiol 13:1577-89. 2011
    ..In S. avermitilis the biosynthesis also yielded all three branched FAs; apart from this pathway, both pivalic and 2-methylbutyric acids were incorporated into the antibiotic avermectin...
  38. doi Hydrophilic interaction liquid chromatography: ESI-MS/MS of plasmalogen phospholipids from Pectinatus bacterium
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 142 20, Prague, Czech Republic
    Lipids 46:765-80. 2011
    ..Major molecular species were c-p19:0/15:0 PlsEtn and PlsSer, which accounted for more than 4% of the total lipids...
  39. doi The genus Dracunculus--a source of triacylglycerols containing odd-numbered ω-phenyl fatty acids
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 14220 Prague 4, Czech Republic
    Phytochemistry 72:1914-26. 2011
    ..Both synthetic and natural compounds containing ω-phenylalkanoic acids were found to have antioxidant and free radical scavenging properties...
  40. doi Effect of nitrogen and phosphorus starvation on the polyunsaturated triacylglycerol composition, including positional isomer distribution, in the alga Trachydiscus minutus
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic
    Phytochemistry 72:2342-51. 2011
    ..The control cultivation yielded ~90% asymmetrical TAGs with two PUFAs (i.e. PEE and PAA), whereas with N- and P-starvation the ratio of symmetrical to asymmetrical TAGs increased to 2:1 and 3:2, respectively...
  41. doi Rhamnolipid-producing thermophilic bacteria of species Thermus and Meiothermus
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic
    Extremophiles 15:697-709. 2011
    ..Importantly, in comparison to P. aeruginosa both strains, i.e., Thermus and Meiothermus, are Biosafety level 1 microorganisms and are not pathogenic to humans...
  42. ncbi Glycosides of polyenoic branched fatty acids from myxomycetes
    Tomas Rezanka
    Institute of Microbiology, Videnska 1083, Prague 14220, Czech Republic
    Phytochemistry 60:639-46. 2002
    ..Pers., two in A. denudata (L.) Wetts., and A. nutans (Bull.) Grev., Fuligo septica (L.) Wigg., Lycogala epidendrum (L.) Fries, Physarum polycephalum Schwein., and Trichia varia Pers. contained one of the identified glycosides each...
  43. ncbi The tornabeatins, four tetrahydro-2-furanone derivatives from the lichenized ascomycete Tornabea scutellifera (With.) J.R. Laundon
    Tomas Rezanka
    Institute of Microbiology, Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic
    Phytochemistry 65:2605-12. 2004
    ..Tornabeatins A, B, C and D, have been isolated as new natural products from the lichenized ascomycete Tornabea scutellifera, and their structures elucidated using UV, IR, MS, 1D and 2D NMR spectral data and chemical degradation...
  44. ncbi Polar lipids and fatty acids of three wild cyanobacterial strains of the genus Chroococcidiopsis
    T Rezanka
    Institute of Microbiology, 142 20 Prague, Czechia
    Folia Microbiol (Praha) 48:781-6. 2003
    ..Nonphosphorus betaine-containing lipid, viz. N,N,N-trimethylhomoserin-4-O-yl-diacylglycerol, was found for the first time in cyanobacterial species...
  45. ncbi Enteridinines A and B from slime mold Enteridium lycoperdon
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of Czech Republic, Videnska 1083, 14220 Prague, Czech Republic
    Phytochemistry 65:455-62. 2004
    ....
  46. ncbi Polypropionate lactones of deoxysugars glycosides from slime mold Lycogala epidendrum
    Tomas Rezanka
    Institute of Microbiology, Videnska 1083, 14220 Prague, Czech Republic
    Phytochemistry 63:945-52. 2003
    ....
  47. ncbi Two cyclohexenone glycosides from the North American fern Woodwardia virginica (L.) Smith
    Tomas Rezanka
    Institute of Microbiology, Czech Academy of Sciences, 1083, 142 20 Prague, Videnska, Czech Republic
    Phytochemistry 63:931-7. 2003
    ..The structures were elucidated using extensive spectroscopic analysis (1D and 2D NMR, MS, IR, CD and UV) including determination of absolute stereochemistry by chemical methods...
  48. ncbi Sterol compositions of the filamentous nitrogen-fixing terrestrial cyanobacterium Scytonema sp
    T Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, 142 20 Prague, Czechia
    Folia Microbiol (Praha) 48:357-60. 2003
    ..The dominant sterols were cholest-5-en-3 beta-ol (18.9%), 3 beta-methoxycholest-5-ene (16.2%) and 3 beta-acetoxycholest-5-ene (11.2%)...
  49. ncbi Identification of acylated xanthone glycosides by liquid chromatography-atmospheric pressure chemical ionization mass spectrometry in positive and negative modes from the lichen Umbilicaria proboscidea
    Tomas Rezanka
    Institute of Microbiology, Videnska 1083, Prague 14220 Czech Republic
    J Chromatogr A 995:109-18. 2003
    ..The optimal ionization conditions were achieved in positive ion APCI by using ammonium acetate buffer and in negative ion APCI by using formic acid (pH 4)...
  50. ncbi Fatty acid composition of six freshwater wild cyanobacterial species
    T Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, 142 20 Prague, Czechia
    Folia Microbiol (Praha) 48:71-5. 2003
    ....
  51. ncbi Prenylated xanthone glucosides from Ural's lichen Umbilicaria proboscidea
    Tomas Rezanka
    Institute of Microbiology, Videnska 1083, Prague 14220, Czech Republic
    Phytochemistry 62:607-12. 2003
    ..The structures were elucidated on the basis of extensive spectroscopic analysis (1D and 2D NMR, MS, IR and UV) and by hydrolysis...
  52. ncbi Hirtusneanoside, an unsymmetrical dimeric tetrahydroxanthone from the lichen Usnea hirta
    Tomas Rezanka
    Institute of Microbiology, Prague, Czech Republic
    J Nat Prod 70:1487-91. 2007
    ..Hirtusneanoside has a unique structure comprising L-rhamnopyranoside of a tetrahydroxanthone dimer and showed growth inhibitory activities against Gram-positive bacteria...
  53. ncbi Multibranched polyunsaturated and very-long-chain fatty acids of freshwater Israeli sponges
    Tomas Rezanka
    Institute of Microbiology, Videnska 1083, 142 20, Prague, Czech Republic
    J Nat Prod 65:709-13. 2002
    ..The compounds gave positive results in a brine shrimp toxicity assay...
  54. ncbi Chromatography of long chain alcohols (polyprenols) from animal and plant sources
    T Rezanka
    Institute of Microbiology, Videnska 1083, Prague 142 20, Czech Republic
    J Chromatogr A 936:95-110. 2001
    ..After a brief introductory discussion on the biological aspects of the polyprenols, the review focuses on various techniques for the isolation, purification, chromatographic separation and detection of polyprenols...
  55. ncbi Macrolactone glycosides of three lichen acids from Acarospora gobiensis, a lichen of Central Asia
    T Rezanka
    Institute of Microbiology, Videnska 1083, 14220 Prague, Czech Republic
    Phytochemistry 58:1281-7. 2001
    ..The structures were elucidated by using extensive spectroscopic analysis (1D and 2D NMR, MS, IR and ORD) and chemical and enzymatic methods...
  56. ncbi Glycoside esters from lichens of central Asia
    T Rezanka
    Institute of Microbiology, Videnska 1083, 14220, Prague, Czech Republic
    Phytochemistry 58:509-16. 2001
    ..The structures were elucidated using extensive spectroscopic analysis (1D and 2D NMR, MS, IR, UV and ORD) and by biochemical methods...
  57. ncbi Polyhalogenated homosesquiterpenic fatty acids from Plocamium cartilagineum
    T Rezanka
    Institute of Microbiology, Prague, Czech Republic
    Phytochemistry 57:607-11. 2001
    ..The compounds, predominantly derivatives with unique groups (bromine, chlorine, and diene), were identified by means of 1H and 13C NMR, MS, IR and UV spectra...
  58. ncbi Bromoallenic lipid compounds from lichens of central Asia
    T Rezanka
    Institute of Microbiology, Prague, Czech Republic
    Phytochemistry 56:869-74. 2001
    ..The composition of two bromoallenic aliphatic fatty acids obtained from lichens collected around Lake Issyk-Kul (central Asia) is described. These compounds were identified by means of 1H and 13C NMR, MS and IR spectra...
  59. ncbi Further glucosides of lichens' acids from Central Asian lichens
    T Rezanka
    Institute of Microbiology, Prague, Czech Republic
    Phytochemistry 56:181-8. 2001
    ..The structures were elucidated using extensive spectroscopic analysis (1D and 2D NMR, MS, IR, UV and CD) and by chemical methods...
  60. ncbi Glycosidic compounds of murolic, protoconstipatic and allo-murolic acids from lichens of Central Asia
    T Rezanka
    Institute of Microbiology, Academy of Sciences of Czech Republic, Prague
    Phytochemistry 54:635-45. 2000
    ..The structures were elucidated by using extensive spectroscopic analysis (1D and 2D NMR, MS, IR, UV and CD) and chemical methods...
  61. ncbi Natural microbial UV radiation filters--mycosporine-like amino acids
    T Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague, Czechia
    Folia Microbiol (Praha) 49:339-52. 2004
    ..This review points to the role of MAAs as a natural defense against UV radiation...
  62. ncbi Biologically active compounds of semi-metals
    Tomas Rezanka
    Institute of Microbiology, Videnska 1083, Prague 142 20, Czech Republic
    Phytochemistry 69:585-606. 2008
    ..Other metalloids, i.e. the rare and toxic tellurium and the radioactive short-lived astatine, have no biological significance...
  63. ncbi Sinaicinone, a complex adamantanyl derivative from Hypericum sinaicum
    Tomas Rezanka
    Institute of Microbiology, Videnska 1083, 14220 Prague, Czech Republic
    Phytochemistry 68:1272-6. 2007
    ..It is a complex adamantanyl derivative with a unique skeleton and oxygenated side chains...
  64. ncbi Identification of very long chain unsaturated fatty acids from Ximenia oil by atmospheric pressure chemical ionization liquid chromatography-mass spectroscopy
    Tomas Rezanka
    Institute of Microbiology, Videnska 1083, Prague 142 20, Czech Republic
    Phytochemistry 68:925-34. 2007
    ..The combination of these two techniques was used to identify unusual unsaturated VLCFAs up to tetracontenoic acid. All four positional isomers of tetratriacontenoic acid were also synthesized to unambiguously confirm their structure...
  65. ncbi Metabolites produced by cyanobacteria belonging to several species of the family Nostocaceae
    T Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, 142 20 Prague, Czechia
    Folia Microbiol (Praha) 51:159-82. 2006
    ....
  66. ncbi The colleflaccinosides, two chiral bianthraquinone glycosides with antitumor activity from the lichen Collema flaccidum collected in Israel and Russia
    Tomas Rezanka
    Institute of Microbiology, Czech Academy of Sciences, Videnska 1083, 142 20 Prague, Czech Republic
    Nat Prod Res 20:969-80. 2006
    ..Their structures were elucidated using UV, CD, IR, MS, 1D and 2D NMR spectral data, and chemical degradation. The colleflaccinosides B had significant antitumor activity in the crown gall tumor inhibition test...
  67. ncbi Identification of very long chain fatty acids from sugar cane wax by atmospheric pressure chemical ionization liquid chromatography-mass spectroscopy
    Tomas Rezanka
    Institute of Microbiology, Prague, Czech Republic
    Phytochemistry 67:916-23. 2006
    ..The combination of these two techniques was used to identify unusual saturated VLCFAs up to C(50)...
  68. doi Effect of starvation on the distribution of positional isomers and enantiomers of triacylglycerol in the diatom Phaeodactylum tricornutum
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 142 0 Prague 4, Czech Republic
    Phytochemistry 80:17-27. 2012
    ..Under N-starvation the ratios were reversed irrespective of the presence or absence of silicate in the medium. A similar pattern was found in P- and S-starvation...
  69. doi Identification of regioisomers and enantiomers of triacylglycerols in different yeasts using reversed- and chiral-phase LC-MS
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic
    J Sep Sci 36:3310-20. 2013
    ..In strains containing palmitoleic acid at 10-25% total FAs this acid is mainly bound in sn-3, saturated FA being bound in sn-1. Strains containing <10% palmitoleic acid form preferentially symmetrical TAGs. ..
  70. doi Structural analysis of mycolic acids from phenol-degrading strain of Rhodococcus erythropolis by liquid chromatography-tandem mass spectrometry
    Irena Kolouchová
    Department of Biotechnology, Institute of Chemical Technology Prague, Technicka 5, Prague, Czech Republic
    Folia Microbiol (Praha) 57:473-83. 2012
    ..The addition of humic acids showed that there is a marked increase of unsaturated mycolic acids, mostly in the range of 20-100 %. This effect is more pronounced in the R. erythropolis CCM 2595 strain...
  71. doi RP-HPLC/MS-APCI analysis of branched chain TAG prepared by precursor-directed biosynthesis with Rhodococcus erythropolis
    Olga Schreiberová
    Department of Fermentation Chemistry and Bioengineering, Institute of Chemical Technology Prague, Technicka 5, 166 28, Prague, Czech Republic
    Lipids 45:743-56. 2010
    ..9:1.2, respectively). Also, incorporation of Val (isobutyrate) yielded only TAG having two branched FA in the molecule, whereas Leu and Ile (isovalerate and 2-methyl-butyrate) gave only TAG with a single branched FA in the molecule...
  72. doi Very-long-chain iso and anteiso branched fatty acids in N-acylphosphatidylethanolamines from a natural cyanobacterial mat of Calothrix sp
    Tomas Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 142 20 Prague, Czech Republic
    Phytochemistry 70:655-63. 2009
    ..collected in Antarctica and determine their component VLCFA up to 33-methyltetratriacontanoic acid as picolinyl ester derivatives using GC-MS...
  73. ncbi Lincomycin, cultivation of producing strains and biosynthesis
    J Spizek
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 142 20 Prague 4, Czech Republic
    Appl Microbiol Biotechnol 63:510-9. 2004
    ..Biosynthesis of lincomycin and related compounds and its genetic control are briefly discussed...
  74. ncbi Lincomycin, clindamycin and their applications
    J Spizek
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 142 20 Prague, Czech Republic
    Appl Microbiol Biotechnol 64:455-64. 2004
    ..Resistance to lincomycin and clindamycin may be caused by methylation of 23S ribosomal RNA, modification of the antibiotics by specific enzymes or active efflux from the periplasmic space...
  75. doi Biosynthesis of ω-alicyclic fatty acids induced by cyclic precursors and change of membrane fluidity in thermophilic bacteria Geobacillus stearothermophilus and Meiothermus ruber
    Lucie Siristova
    Department of Fermentation Chemistry and Bioengineering, Institute of Chemical Technology Prague, Technicka 3, 166 28, Prague, Czech Republic
    Extremophiles 15:423-9. 2011
    ..This is caused by considerable changes in lipid packing within the membrane induced by the presence of ω-FAs not found in the natural environment of Geobacillus and Meiothermus strains...
  76. doi Sweet antibiotics - the role of glycosidic residues in antibiotic and antitumor activity and their randomization
    Vladimir Kren
    Centre of Biocatalysis and Biotransformation, Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic
    FEMS Microbiol Rev 32:858-89. 2008
    ..The new enzymatic methodology 'glycorandomization' enabled the preparation of glycoside libraries and opened up new ways to prepare optimized or entirely novel glycoside antibiotics...
  77. doi Do we need new antibiotics? The search for new targets and new compounds
    Jaroslav Spizek
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Videnska 1083, 14220 Prague 4, Czech Republic
    J Ind Microbiol Biotechnol 37:1241-8. 2010
    ....
  78. ncbi Biodegradable plastics from renewable sources
    M Flieger
    Institute of Microbiology, Academy of Sciences of the Czech Republic, 142 20 Prague, Czechia
    Folia Microbiol (Praha) 48:27-44. 2003
    ..Others are products of microbial fermentations (i.e. polyesters and neutral polysaccharides) or are prepared from chemically modified natural products (e.g., starch, cellulose, chitin or soy protein)...
  79. ncbi Removal of copper ions from dilute solutions by Streptomyces noursei mycelium. Comparison with yeast biomass
    P Kujan
    Institute of Microbiology, Academy of Sciences of the Czech Republic, 142 20 Prague, Czechia
    Folia Microbiol (Praha) 50:309-13. 2005
    ..The copper sorption capacity of S. noursei after optimization was found to be higher than that of the two other adsorbents (dried yeast biomass 82 %, native Candida cells 48 % of the sorption capacity of the S. noursei mycelium)...
  80. ncbi Use of the industrial yeast Candida utilis for cadmium sorption
    P Kujan
    Institute of Microbiology, Academy of Sciences of the Czech Republic, Prague, Czechia
    Folia Microbiol (Praha) 51:257-60. 2006
    ..Considering the sorption of the dried yeast biomass equal to 100 %, the cells in alginate reached 86 % while native cells showed only 42 %...
  81. ncbi Compounds isolated at the Institute of Microbiology in 1989-2001 and future trends
    T Rezanka
    Institute of Microbiology, Academy of Sciences of the Czech Republic, 142 00 Prague, Czechia
    Folia Microbiol (Praha) 47:587-639. 2002
    ..Due to the development of separation (chromatographic) methods and of analytical methods used to determine the chemical structure of these compounds, i.e. NMR, MS and X-ray diffraction, many new metabolites could be described...