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  • 1
    Electronic Resource
    Electronic Resource
    Phase separation in poly(enaminonitrile) solutions and blends (1991)
    s.l. : American Chemical Society
    Chemistry of materials 3 (1991), S. 742-745 
    Details
    ISSN: 1520-5002
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/cm00016a032
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  • 2
    Electronic Resource
    Electronic Resource
    Superantigen-like gene(s) in human pathogenic Streptococcus dysgalactiae, subsp. equisimilis: genomic localisation of the gene encoding streptococcal pyrogenic exotoxin G (speGdys) (2002)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS immunology and medical microbiology 34 (2002), S. 0 
    Details
    ISSN: 1574-695X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Streptococcus pyogenes (GAS) causes about 90% of streptococcal human infections while group C (GCS) and G (GGS) streptococci can be pathogenic for different mammalians. Especially the human pathogenic GCS and GGS, Streptococcus dysgalactiae, subsp. equisimilis, account for 5–8% of the human streptococcal diseases like wound infections, otitis media, purulent pharyngitis and also streptococcal toxic shock syndrome. A defined superantigen so far was not identified in GCS and GGS strains. In the present investigation we screened DNA of GCS and GGS human isolates for the presence of genes for streptococcal pyrogenic exotoxins (spe) by hybridisation with probes that stand for the GAS genes speA, speC, speZ (smeZ), speH, speG, speI, speJ and ssa. In many GCS and GGS strains we found positive reactions with the probes speG, speJ and ssa, but not with the probes for the remaining genes under investigation. PCR amplification with subsequent sequence analysis of the PCR fragments revealed only the presence of the gene speG in GCS and GGS strains, while no DNA fragments specific for speJ and ssa could be amplified. Additionally, the upstream and downstream regions flanking speG in GGS strain 39072 were sequenced. Remarkable differences were found in the neighbourhood of speG between GAS and GGS sequences. Downstream of speG we identified in strain GGS 39072 two new open reading frames encoding proteins with no similarity to protein sequences accessible in the databases so far. In the compared GAS strains SF370 and MGAS8232, this segment, apart from some small fragments, had been deleted. Our analysis suggests that a gene transfer from GGS to GAS has preceded following deletion of the two genes orf1 and orf2 in GAS.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-695X.2002.tb00618.x
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  • 3
    Electronic Resource
    Electronic Resource
    Synthetische Arbeiten in der Reihe der aromatischen Erythrina-Alkaloide, XX Synthese des 15.16-Dimethoxy-trans-erythrinans und dessen Abbau zum trans-Erythrinan (1971)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 2937-2959 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Syntheses of Aromatic Erythrina-Alkaloids, XX Synthesis of 15.16-Dimethoxy-trans-erythrinane and its Degradation to trans-ErythrinaneCatalytic hydrogenation of the Δ1.6-dien-lactam 13 on platinum in acetic acid yields the stereoisomeric lactams 14 and 15. Reduction with LiAlH4 affords the cis- and trans-bases 8 and 5, respectively. On palladium/carbon in methanol, the Δ1.6-diene-base 12 is hydrogenated only partially to give the Δ1(6)-base 19 which, on platinum in acetic acid, can be further hydrogenated to a mixture of isomers 8 and 5. For the first step. this result is in agreement with Prelog's rules concerning catalytic hydrogenation of aromatic Erythrina alkaloids, whereas the second step is non-stereospecific.8 and 5 are cis/trans-isomers according to their spectra and Hofmann degradation to the same product 27. Resolution of 5 yields the antipodes. The (+)-compound has 5S, 6R configuration.The trans-crythrinane (6) was prepared by degradation of 5 for purposes of comparison with Belleau's cis-crythrinane (7).
    Notes: Die katalytische Hydrierung des Δ1.6-Dien-lactams 13 mit Platin in Eisessig führt zu den stereoisomeren Lactamen 14 und 15, aus denen durch Reduktion mit Lithiumalanat die cis-und trans-Basen 8 und 5 erhalten werden. Die Δ1.6-Dienbase 12 läßt sich mit Palladium-Kohle in Methanol nur partiell zur Δ1(6)-Base 19 hydrieren, deren Weiterhydrierung mit Platin in Eisessig ein Gemisch von 8 und 5 liefert. Die Regeln von Prelog für die katalytische Hydrierung der aromatischen Erythrina-Alkaloide gelten daher für den ersten Hydrierungsschritt, aber nicht für den zweiten, der nicht mehr stereospezifisch verläuft.Die cis/trans-Isomerie von 8 und 5 ist durch die Spektren und den Abbau beider Isomeren nach Hofmann bis zum gemeinsamen Endprodukt 27 bewiesen. Durch Spaltung von 5 werden die optischen Antipoden gewonnen, von denen der rechtsdrehende die 5S, 6R-Konfiguration besitzt.Um einen Vergleich mit dem cis-Erythrinan (7) von Belleau durchzuführen, wird 5 zum trans-Erythrinan (6) abgebaut.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19711040935
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  • 4
    Electronic Resource
    Electronic Resource
    Notiz zur Synthese und Reduktion von Thiolactamen der Erythrinanreihe (1970)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 1298-1301 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19701030433
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  • 5
    Electronic Resource
    Electronic Resource
    Synthese Arbeiten in der Reihe der aromatischen Erythrina-Alkaloide, XII. Synthese doppelt ungesättigter Erythrinane (1970)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 1286-1297 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Syntheses of Aromatic Erythrina-Alkaloids, XII) Synthese of Doubly Unsaturated ErythrinanesThe Δ1,6-diene-lactam 11 of the erythrinane series is synthesized via three different routes. It cannot be reduced by LiAlH4. Therefore, the Δ1,6-diene base 15 is prepared from the basic mesylate 5e. Under apparently identical conditions cleavage of 5e with KOH in diglyme leads to 15 in yields up to 70% or to Prelog's base 19 by scission of the ring in yields up to 60%.
    Notes: Das Δ1.6-Dien-lactam 11 der Erythrinanreihe kann auf drei verschiedenen Wegen dargestellt werden. Da seine Reduktion mit Lithiumalanat nicht möglich ist, wird eine direkte Synthese zur Δ1.6-Dienbase 15 über die Mesylatbase 5e entwickelt. Die Spaltung von 5e mit KOH in Diglyme führt unter scheinbar identischen Reaktionsbedingungen entweder zu 15 in Ausbeuten bis zu 70% oder unter Ringaufspaltung zur „Prelog-Base“ 19 in Ausbeuten bis zu 60%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19701030432
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  • 6
    Electronic Resource
    Electronic Resource
    Synthetische Arbeiten in der Reihe der aromatischen Erythrina-Alkaloide, XIX. Synthese von cis- und trans-Erythrinanen durch oxydative Dimerisierung (1971)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 279-289 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Syntheses of Aromatic Erythrina-Alkaloids, XIX. Synthesis of cis- and trans-Erythrinanes by Oxidative DimerisationLead tetraacetate oxidation of the enol lactam 1 yields the dimeric isomers 9 and 11 with the cis- and trans-erythrinane structure, respectively. The enolethers are completely stable towards mineral acids, but are easily cleft by hydrogenation with platinum in methanol.
    Notes: Blei(IV)-acetat oxydiert das Enol-lactam 1 zu den isomeren Doppelmolekülen 9 und 11 der cis- und trans-Erythrinan-Reihe. Die Enoläther sind gegenüber Mineralsäuren völlig beständig, werden aber durch katalytische Hydrierung mit Platin in Methanol leicht gespalten.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19711040133
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  • 7
    Electronic Resource
    Electronic Resource
    Notiz zur Synthese optisch aktiver α-Isocyancarbonsäure-Derivate für Peptidsynthesen mittels Vier-Komponenten-Kondensation (4 CC) (1977)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 110 (1977), S. 2012-2015 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19771100545
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  • 8
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    Multiple Optical Sensor Fusion for Mineral Mapping of Core Samples (2020)
    Molecular Diversity Preservation International
    Details
    Publication Date: 2020-07-05
    Description: Geological objects are characterized by a high complexity inherent to a strong compositional variability at all scales and usually unclear class boundaries. Therefore, dedicated processing schemes are required for the analysis of such data for mineralogical mapping. On the other hand, the variety of optical sensing technology reveals different data attributes and therefore multi-sensor approaches are adapted to solve such complicated mapping problems. In this paper, we devise an adapted multi-optical sensor fusion (MOSFus) workflow which takes the geological characteristics into account. The proposed processing chain exhaustively covers all relevant stages, including data acquisition, preprocessing, feature fusion, and mineralogical mapping. The concept includes (i) a spatial feature extraction based on morphological profiles on RGB data with high spatial resolution, (ii) a specific noise reduction applied on the hyperspectral data that assumes mixed sparse and Gaussian contamination, and (iii) a subsequent dimensionality reduction using a sparse and smooth low rank analysis. The feature extraction approach allows one to fuse heterogeneous data at variable resolutions, scales, and spectral ranges and improve classification substantially. The last step of the approach, an SVM classifier, is robust to unbalanced and sparse training sets and is particularly efficient with complex imaging data. We evaluate the performance of the procedure with two different multi-optical sensor datasets. The results demonstrate the superiority of this dedicated approach over common strategies.
    Electronic ISSN: 1424-8220
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Published by Molecular Diversity Preservation International
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  • 9
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    Isolation and Identification of Intermediates of the Oxidative Bilirubin Degradation (2016)
    American Chemical Society (ACS)
    Details
    Publication Date: 2016-08-17
    Description: Organic Letters DOI: 10.1021/acs.orglett.6b02287
    Print ISSN: 1523-7060
    Electronic ISSN: 1523-7052
    Topics: Chemistry and Pharmacology
    Published by American Chemical Society (ACS)
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  • 10
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    Modified nucleosides as biomarkers for early cancer diagnose in exposed populations (2014)
    Wiley
    Details
    Publication Date: 2014-02-26
    Description: ABSTRACT There is increasing worldwide interest in developing of markers for tumor diagnosis and identification of individuals who are at high cancer risk. Cancer, like other diseases accompanied by metabolic disorders, causes characteristic effects on cell turnover rate, activity of modifying enzymes, and RNA/DNA modifications. This results in an increased excretion of modified nucleosides in cancer patients. Therefore, for many years modified nucleosides have been suggested as tumor markers. The aim of the study was to elucidate further the usefulness of urinary nucleosides as possible markers at early detection of cancer in persons which are exposed against tumor promoting influences during their working life. Uranium miners are exposed to many kinds of pollutants that can cause health damage even lead to carcinogenesis. We analyzed modified nucleosides in urine samples from 92 miners who are at high risk for lung cancer to assess the levels of nucleosides by a multilayer perceptron (MLP) classifier – a neural network model. Eighteen nucleosides/metabolites were detected with reversed-phase high-pressure liquid chromatography (RP-HPLC). A valid set of urinary metabolites were selected and multivariate statistical technique of multilayer perceptron neural network were applied. In a previous study, MLP shows a sensitivity and specificity of 97 and 85%, respectively. MLP classification including the most relevant markers/nucleosides clearly demonstrates the elevation of RNA metabolism in miners, which is associated with possible malignant disease. We found that there were 30 subjects with early health disorders among 92 uranium workers based on MLP technique using modified nucleosides. The combination of RP-HPLC analysis of modified nucleosides and subsequent MLP analyses represents a promising tool for the development of a non-invasive prediction system and may assist in developing management and surveillance procedures. © 2014 Wiley Periodicals, Inc. Environ Toxicol, 2014.
    Print ISSN: 1520-4081
    Electronic ISSN: 1522-7278
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by Wiley
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