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  • Chemistry  (12)
  • 12.38.-t  (2)
  • Justicia simplex  (2)
  • cell immobilization  (2)
  • microbial transformation  (2)
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Materialart
Erscheinungszeitraum
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  • 1
    Digitale Medien
    Digitale Medien
    Simplexolin, a new lignan from Justicia simplex
    Amsterdam : Elsevier
    Phytochemistry 18 (1979), S. 503-505 
    Details
    ISSN: 0031-9422
    Schlagwort(e): 2,6-di-(3',4'-methylenedioxyphenoxy)-3,7-dioxabicyclo-[3,3,0]-octane ; Acanthaceae ; Justicia simplex ; asarinin ; ligans ; sesamin ; sesamolin ; simplexolin ; structural determination.
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0031-9422(00)81904-4
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  • 2
    Digitale Medien
    Digitale Medien
    Steroid transformations by microorganisms-III
    Amsterdam : Elsevier
    Phytochemistry 28 (1989), S. 7-40 
    Details
    ISSN: 0031-9422
    Schlagwort(e): Steroids ; cell immobilization ; methods for better yields of steroid metabolises. ; microbial transformation ; production of steroid drugs
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0031-9422(89)85002-2
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  • 3
    Digitale Medien
    Digitale Medien
    New furofurano lignans from Justicia simplex
    Amsterdam : Elsevier
    Phytochemistry 19 (1980), S. 332-334 
    Details
    ISSN: 0031-9422
    Schlagwort(e): 3,7-dioxabicyclo[3,3,0]octane lignan ; Acanthaceae ; Justicia simplex ; biological function. ; isolation ; justisolin ; lignan O-glucoside ; simplexoside ; structure elucidation
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie , Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0031-9422(00)81989-5
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  • 4
    Digitale Medien
    Digitale Medien
    Transformation of cholic acid by Arthrobacter simplex
    Amsterdam : Elsevier
    Steroids 58 (1993), S. 484-490 
    Details
    ISSN: 0039-128X
    Schlagwort(e): Arthrobacter simplex ; NMR ; cholic acid ; mass spectrometry ; metabolites ; microbial transformation
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Medizin
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0039-128X(93)90007-A
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  • 5
    Digitale Medien
    Digitale Medien
    Advances in microbial biotechnology of bile acids
    Amsterdam : Elsevier
    Biotechnology Advances 12 (1994), S. 357-391 
    Details
    ISSN: 0734-9750
    Schlagwort(e): Microbial biotechnology ; bile acid metabolites ; bile acids ; cell immobilization ; selective biotransformation ; transposon mutagenesis
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1016/0734-9750(94)90017-5
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  • 6
    Digitale Medien
    Digitale Medien
    Correlations between D and $${\overline D}$$ mesons produced in 500 GeV/cπ−-nucleon interactions (1999)
    Springer
    EPJ direct 1 (1999), S. 1-67 
    Details
    ISSN: 1435-3725
    Schlagwort(e): 12.38.-t ; 13.85.-t ; 13.87.Ce ; 13.87.Fh
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We present a study of correlations between D and $${\overline D}$$ mesons produced in 500 GeV/cπ−-nucleon interactions, based on data from experiment E791 at Fermilab. We have fully reconstructed 791 ± 44 charm meson pairs to study correlations between the transverse and longitudinal momenta of the two D mesons and the relative production rates for different types of D meson pairs. We see slight correlations between the longitudinal momenta of the D and the $${\bar D}$$ , and significant correlations between the azimuthal angle of the D and the $${\bar D}$$ . The experimental distributions are compared to a next-to-leading-order QCD calculation and to predictions of the PYTHIA/JETSET Monte Carlo event generator. We observe less correlation between transverse momenta and different correlations between longitudinal momenta than these models predict for the default values of the model parameters. Better agreement between data and theory might be achieved by tuning the model parameters or by adding higher order perturbative terms, thus contributing to a better understanding of charm production. The relative production rates for the four sets of charm pairs, $$D^0{{\overline D}^0}, D^0 D^{-}, D^+{{\overline D}^0}, D^+ D^{-}$$ as calculated in the PYTHIA/JETSET event generator with the default parameters, agree with data as far as the relative ordering, but predict too many $$D^+ {{\overline D}^0}$$ pairs and too few $$D^+ D^{-}$$ pairs.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s101059900c0004
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  • 7
    Digitale Medien
    Digitale Medien
    Correlations between D and $${\overline D}$$ mesons produced in 500 GeV/cπ−-nucleon interactions (2000)
    Springer
    EPJ direct 1 (2000), S. 1-67 
    Details
    ISSN: 1435-3725
    Schlagwort(e): 12.38.-t ; 13.85.-t ; 13.87.Ce ; 13.87.Fh
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We present a study of correlations between D and $${\overline D}$$ mesons produced in 500 GeV/cπ−-nucleon interactions, based on data from experiment E791 at Fermilab. We have fully reconstructed 791 ± 44 charm meson pairs to study correlations between the transverse and longitudinal momenta of the two D mesons and the relative production rates for different types of D meson pairs. We see slight correlations between the longitudinal momenta of the D and the $${\bar D}$$ , and significant correlations between the azimuthal angle of the D and the $${\bar D}$$ . The experimental distributions are compared to a next-to-leading-order QCD calculation and to predictions of the PYTHIA/JETSET Monte Carlo event generator. We observe less correlation between transverse momenta and different correlations between longitudinal momenta than these models predict for the default values of the model parameters. Better agreement between data and theory might be achieved by tuning the model parameters or by adding higher order perturbative terms, thus contributing to a better understanding of charm production. The relative production rates for the four sets of charm pairs, $$D^0{{\overline D}^0}, D^0 D^{-}, D^+{{\overline D}^0}, D^+ D^{-}$$ as calculated in the PYTHIA/JETSET event generator with the default parameters, agree with data as far as the relative ordering, but predict too many $$D^+ {{\overline D}^0}$$ pairs and too few $$D^+ D^{-}$$ pairs.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s101059900c0004
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  • 8
    Digitale Medien
    Digitale Medien
    Synthesis of a poly(terephthaloylphosphine) (1992)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 199 (1992), S. 1-6 
    Details
    ISSN: 0003-3146
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Beschreibung / Inhaltsverzeichnis: Poly(phenylphosphindiylterephthaloyl), ein neues phosphorhaltiges Polymeres, wurde durch Lösungspolykondensation von Dilithium(phenyl)phosphin mit Terephthaloylchlorid bei niedriger Temperatur hergestellt. Es ist in polaren aprotischen Lösungsmitteln löslich; die inhärente Viskosität in DMF bei 30°C beträgt 19 ml/g. Das Polymere wurde mittels Elementaranalyse sowie IR- und 1H-NMR-Spektroskopie charakterisiert. TGA-Messungen ergeben, daß das Polymere in Luft bis 250°C stabil ist; es ist selbstverlöschend.
    Notizen: Poly(phenylphosphinediylterephthaloyl), a novel phosphorus-containing polymer, was synthesized by low-temperature solution polycondensation of dilithio(phenyl)-phosphine with terephthaloyl chloride. The resulting polymer is soluble in polar aprotic solvents, having inherent viscosity of 19 ml/g in DMF at 30°C. The polymer was characterized by elemental analysis, IR and 1H-NMR spectroscopy. TGA data show that the polymer is stable up to 250°C in air. The polymer was found to be self-extinguishing.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/apmc.1992.051990101
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  • 9
    Digitale Medien
    Digitale Medien
    Sulfur vulcanization of natural rubber accelerated with 2-mercaptobenzothiazole plus tetramethylthiuram disulfide (1979)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 23 (1979), S. 185-200 
    Details
    ISSN: 0021-8995
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: The sulfur vulcanization of NR by a MBT-TMTD mixed accelerator system both in the presence and absence of ZnO and stearic acid with or without DCP has been studied. The rate of decomposition of DCP in the presence of both MBT and TMTD is quite similar to that in the MBT system alone. The reduction in crosslinking due to DCP is dependent mainly on MBT. The decomposition product of TMTD may contribute to it only at the later stage of vulcanization. Though TMTD has no influence on the decomposition rate, it reacts with MBT at least in the initial stage of vulcanization and suppresses the retardation caused by MBT on DCP vulcanization in accordance with the free sulfur decrease, the nature of crosslinking formation both in the presence and absence of DCP, and the methyl iodide treatment of the vulcanizates. The vulcanization process of the MBT-TMTD-S-NR system has been interpreted in terms of both free radical and polar mechanisms. The domination of either of these depends on the dominant amount of either MBT or TMTD in the acclerator ratio. According to the initial high rate of crosslink formation, free sulfur decrease and also the initial additiveness of crosslinking in stocks containing DCP, the vulcanization process of MBT-TMTD-ZnO-St. acid-S-NR system has been explained in terms of an ionic mechanism. The pronounced synergistic nature of such systems has been interpreted by the enhanced activation of MBT-S-ZnO-St. acid complex due to the dithiodicarbamate ion formed in the initial stages of vulcanization, and also by the activation of TMTD accelerated vulcanization due to the mercaptobenzothiazylion.
    Zusätzliches Material: 9 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/app.1979.070230117
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  • 10
    Digitale Medien
    Digitale Medien
    Measurement of mass flux in two-phase flow using combinations of pitot tubes and gamma densitometers (1981)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 27 (1981), S. 177-184 
    Details
    ISSN: 0001-1541
    Schlagwort(e): Chemistry ; Chemical Engineering
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: New experimental data indicate that mass flux in cocurrent gas-liquid flows may be determined by the use of Pitot tubes in conjunction with a local mixture density measurement technique. The data were taken over a wide range of flow regimes in a horizontal pipe and included separated patterns such as stratified and annular flows. Local mixture densities were obtained by a computer-assisted algebraic reconstruction technique that used chordal average densities measured by traversing gamma beam attenuation.The results extend the applicability of this mass flux measurement technique well beyond the relatively homogeneous, high-pressure, steam-water flow situations originally studied by Banerjee and Nguyen (1977).
    Zusätzliches Material: 11 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/aic.690270202
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