ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Continuous Culture with Cell Recycling as a Means to Produce Cell Mass and/or Low Molecular Weight Substances (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 613 (1990), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1990.tb18164.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    The modular xylanase Xyn10A from Rhodothermus marinus is cell-attached, and its C-terminal domain has several putative homologues among cell-attached proteins within the phylum Bacteroidetes (2004)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 241 (2004), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Until recently, the function of the fifth domain of the thermostable modular xylanase Xyn10A from Rhodothermus marinus was unresolved. A putative homologue to this domain was however identified in a mannanase (Man26A) from the same microorganism which raised questions regarding a common function. An extensive search of all accessible data-bases as well as the partially sequenced genomes of R. marinus and Cytophaga hutchinsonii showed that homologues of this domain were encoded by multiple genes in microorganisms in the phylum Bacteroidetes. Moreover, the domain occurred invariably at the C-termini of proteins that were predominantly extra-cellular/cell attached. A primary structure motif of three conserved regions including structurally important glycines and a proline was also identified suggesting a conserved 3D fold. This bioinformatic evidence suggested a possible role of this domain in mediating cell attachment. To confirm this theory, R. marinus was grown, and activity assays showed that the major part of the xylanase activity was connected to whole cells. Moreover, immunocytochemical detection using a Xyn10A-specific antibody proved presence of Xyn10A on the R. marinus cell surface. In the light of this, a revision of experimental data present on both Xyn10A and Man26A was performed, and the results all indicate a cell-anchoring role of the domain, suggesting that this domain represents a novel type of module that mediates cell attachment in proteins originating from members of the phylum Bacteroidetes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/j.femsle.2004.10.026
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Evidence for substrate binding of a recombinant thermostable xylanase originating from Rhodothermus marinus (1998)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 168 (1998), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The xyn1 encoded 5 domain xylanase from the thermophilic bacterium Rhodothermus marinus binds specifically to xylan, β-glucan and amorphous but not crystalline cellulose. Our results show that the binding is mediated by the full length xylanase, but not by the catalytic domain only. Based on similarities concerning both predicted secondary structure and binding specificity found with one cellulose binding domain of CenC from Cellulomonas fimi, we suggest that the binding is mediated by the two N-terminally repeated domains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1998.tb13247.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Integration of Bioconversions and Downstream Processing (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 506 (1987), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1987.tb23842.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Oxygen Supply to Immobilized Cells Using Hydrogen Peroxide (1984)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 434 (1984), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1984.tb29872.x
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Characterization of Gluconobacter oxydans immobilized in calcium alginate (1985)
    Springer
    Applied microbiology and biotechnology 22 (1985), S. 1-7 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Gluconobacter oxydans cells were immobilized in calcium alginate and the preparation was used for the oxidation of glycerol to dihydroxyacetone. The characterization was done according to the guidelines given by the Working Party on Immobilized Biocatalysts of the European Federation of Biotechnology. The pH optimum of the preparation was found to be 5.0 and the temperature optimum was 40°C. However, the operational stability was better at 30°C. The glycerol concentration required to obtain half the maximal reaction rate was about 5 mM for both immobilized and free cells. At low concentrations of glycerol and high concentrations of dihydroxyacetone a slight inhibition was noted. No loss of activity of the immobilized preparation was observed after storage for 68 days at +4°C. Investigation of the operational stability revealed a half-life of 5 days. Studies of the influence of particle size and cell densities as well as that of oxygen concentration revealed that the oxygen supply was the rate limiting step.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00252148
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Continuous culture with complete cell recycle: cultivation of Pseudomonas cepacia ATCC 29351 on salicylate for production of salicylate hydroxylase (1989)
    Springer
    Applied microbiology and biotechnology 30 (1989), S. 1-4 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Pseudomonas cepacia ATCC 29351 was cultivated on salicylate as sole carbon source in a system with complete cell recycling by means of a hollow fiber microfilter. Comparisons with batch cultures and continuous cultures are made with respect to cell densities, yield coefficients, specific enzyme activities and volumetric productivities. In batch cultures the toxicity of the salicylate limits the cell densities to below 1 g/l. In a recycling cultivation, a cell concentration of 15.1 g/l was obtained and the volumetric productivity of the cell mass was increased by a factor of 3. No serious effects on the cells were noted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00255988
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Biotechnological possibilities for waste tyre-rubber treatment (1998)
    Springer
    Biodegradation 9 (1998), S. 301-310 
    Details
    ISSN: 1572-9729
    Keywords: degradation ; desulphurization ; devulcanization ; rubber recycling ; Thiobacillus ; tyres ; toxicity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Every year large amounts of spent rubber material, mainly from rubber tyres, are discarded. Of the annual total global production of rubber material, which amounts to 16–17 million tonnes, approximately 65% is used for the production of tyres. About 250 millions spent car tyres are generated yearly in USA only. This huge amount of waste rubber material is an environmental problem of great concern. Various ways to remediate the problem have been proposed. Among these are road fillings and combustion in kilns. Spent tyres, however, comprise valuable material that could be recycled if a proper technique can be developed. One way of recycling old tyres is to blend ground spent rubber with virgin material followed by vulcanization. The main obstacle to this recycling is bad adhesion between the crumb and matrix of virgin rubber material due to little formation of interfacial sulphur crosslinks. Micro-organisms able to break sulphur-sulphur and sulphur-carbon bonds can be used to devulcanize waste rubber in order to make polymer chains on the surface more flexible and facilitate increased binding upon vulcanization. Several species belonging to both Bacteria and Archaea have this ability. Mainly sulphur oxidizing species, such as different species of the genus Thiobacillus and thermoacidophiles of the order of Sulfolobales, have been studied in this context. The present paper will give a background to the problem and an overview of the biotechnological possibilities for solutions of waste rubber as an environmental problem, focusing on microbial desulphurization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008337708006
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Oxygenation of immobilized cells using hydrogen-peroxide; a model study of Gluconobacter oxydans converting glycerol to dihydroxyacetone (1982)
    Springer
    Applied microbiology and biotechnology 14 (1982), S. 64-68 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The possibility of using hydrogen-peroxide as an oxygen source in immobilized whole cell systems was investigated. The conversion of glycerol to dihydroxyacetone performed by Ca-alginate immobilized Gluconobacter oxydans was used as a model system. The influence of basic parameters, such as pH, temperature and concentration of hydrogen-peroxide, on the conversion are reported. Continuous production using a packed bed could be substantially improved by using hydrogen-peroxide as a source of oxygen. The productivity was increased almost twenty-fold in the reactor. However, hydrogen-peroxide also caused deactivation of the oxidizing of the cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00498004
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Thermostable xylanolytic enzymes from Rhodothermus marinus grown on xylan (1993)
    Springer
    Applied microbiology and biotechnology 40 (1993), S. 63-68 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The thermophilic eubacterium Rhodothermus marinus was cultivated in a fermentor and studied with respect to activities of induced xylanolytic enzymes. Growth in the fermentor on xylan occurred with a maximum specific growth rate of 0.43 h−1 for a batch culture. The final cell concentration was 4 g cell dry weight (CDW)/l for cells grown on xylan compared to 2 g CDW/l for cells grown without xylan in the cultivation medium. At least two xylanolytic enzymes, endo-1,4-β-xylanase and xylan 1,4-β-xylosidase, were secreted into the culture medium when cells were cultivated on xylan. Of the three cellulolytic enzymes tested for activity, β-glucosidase activity was in the range of the xylanolytic enzyme activities whereas cellulose-1,4-β-cellobiosidase and cellulase activities were hardly detectable. The expression of endo-1,4-β-xylanase activities during cultivation indicates the existance of more than one xylanase in R. marinus. This is also observed in fractions from gel filtration. The xylanolytic enzymes are heat-stable. At 90°C and at pH 7.0 the half-life of the endo-1,4-β-xylanase was about 14 h and that of xylan 1,4-β-xylosidase was 45 min.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00170430
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...