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  • 1
    Electronic Resource
    Electronic Resource
    Novel total syntheses of (+)-estrone 3-methyl ether, (+)-13.beta.-ethyl-3-methoxygona-1,3,5(10)-trien-17-one, and (+)-equilenin 3-methyl ether (1975)
    s.l. : American Chemical Society
    The @journal of organic chemistry 40 (1975), S. 681-685 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00894a004
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  • 2
    Electronic Resource
    Electronic Resource
    Gelchromatographische Trennung von Oligostyrolen (1968)
    Springer
    Colloid & polymer science 224 (1968), S. 11-17 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Summary Cationicly prepared oligostyrene mixtures can be separated into the individual oligomers (dimers to pentamers) by gelchromatography employing a gel of methylmethacrylate and 2 mole-% ethyleneglykoldimethacrylate. The fractionation can be followed qualitatively by UV-spectroscopy and quantitatively by gaschromatographic analysis of the eluates. — Tristyrenes, tetrastyrenes, and pentastyrenes can be isolated in preparative quantities by the gelchromatographic method from the oligomer mixtures obtained from styrene and dilute sulfuric acid; however, the individual fractions thus obtained are not uniform but consist of isomer mixtures.
    Notes: Zusammenfassung Kationisch hergestellte Oligostyrol-Gemische lassen sich gelchromatographisch an einem Gel aus Methylmethacrylat und 2 Mol.-% Äthylenglykoldimethacrylat in die einzelnen Oligomeren (Diniere bis Pentamere) auftrennen. Die Fraktionierung kann qualitativ durch UV-Spektroskopie sowie quantitativ durch Gaschromatographie der Eluate verfolgt werden. Aus den aus Styrol mit verdünnter Schwefelsäure erhaltenen Oligomergemischen lassen sich präparativ-gelchromatographisch Tristyrole, Tetrastyrole und Pentastyrole isolieren, die jedoch nicht einheitlich, sondern Isomerengemische sind.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01542384
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  • 3
    Electronic Resource
    Electronic Resource
    Analysis of irradiated food (1991)
    Springer
    Microchimica acta 104 (1991), S. 71-79 
    Details
    ISSN: 1436-5073
    Keywords: food irradiation ; detection ; o-tyrosine ; volatiles ; ESR
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Foods, e.g. chicken, shrimps, frog legs, spices, different dried vegetables, potatoes and fruits are legally irradiated in many countries and are probably also exported into countries, which do not permit irradiation of any food. Therefore all countries need analytical methods to determine whether food has been irradiated or not. Up to now, two physical (ESR-spectroscopy and thermoluminescence) and two chemical methods (o-tyrosine and volatile compounds) are available for routine analysis. Several results of the application of these four mentioned methods on different foods are presented and a short outlook on other methods (chemiluminescence, DNA-changes, biological assays, viscometric method and photostimulated luminescence) will be given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01245498
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  • 4
    Electronic Resource
    Electronic Resource
    Structural and Functional Differences Between Glycosylated and Non-glycosylated Forms of Human Interferon-β (IFN-β) (1998)
    Springer
    Pharmaceutical research 15 (1998), S. 641-649 
    Details
    ISSN: 1573-904X
    Keywords: interferon-β ; AVONEX® ; Betaseron® ; glycosylation ; aggregation ; activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Purpose. Two recombinant IFN-β products have been approved for the treatment of multiple sclerosis, a glycosylated form with the predicted natural amino acid sequence (IFN-β-la) and a non-glycosylated form that has a Met-1 deletion and a Cys-17 to Ser mutation (IFN-β-lb). The structural basis for activity differences between IFN-β-la and IFN-β-lb, is determined. Methods. In vitro antiviral, antiproliferative and immunomodulatory assays were used to directly compare the two IFN-β products. Size exclusion chromatography (SEC), SDS-PAGE, thermal denaturation, and X-ray crystallography were used to examine structural differences. Results. IFN-β- la was 10 times more active than IFN-β- Ib with specific activities in a standard antiviral assay of 20 × 107 lU/mg for IFN-β-la and 2 × 107 lU/mg for IFN-β-lb. Of the known structural differences between IFN-β-la and IFN-β-lb, only glycosylation affected in vitro activity. Deglycosylation of IFN-β-la produced a decrease in total activity that was primarily caused by the formation of an insoluble disulfide-linked IFN precipitate. Deglycosylation also resulted in an increased sensitivity to thermal denaturation. SEC data for IFN-β-lb revealed large, soluble aggregates that had reduced antiviral activity (approximated at 0.7 × 107 lU/mg). Crystallographic data for IFN-β-la revealed that the glycan formed H-bonds with the peptide backbone and shielded an uncharged surface from solvent exposure. Conclusions. Together these results suggest that the greater biological activity of IFN-β-la is due to a stabilizing effect of the carbohydrate on structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1011974512425
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  • 5
    Electronic Resource
    Electronic Resource
    HIV infection is blocked in vitro by recombinant soluble CD4 (1988)
    [s.l.] : Nature Publishing Group
    Nature 331 (1988), S. 76-78 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Radiolabelled synthetic oligonucleotide hybridization probes were used to isolate a full length complementary DNA copy of CD4 (Fig. 1) from a AgtlO library synthesized from poly(A)+ messenger RNA isolated from human peripheral blood lymphocytes (PBLs) (ref. 7). DNA sequence analysis of the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/331076a0
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  • 6
    Electronic Resource
    Electronic Resource
    Gaschromatographische trennung und bestimmung von oligostyrolen (1967)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 1 (1967), S. 17-28 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Cationicly obtained mixtures of styrene and oligostyrenes having polymerization degrees of 2 to 5 may be separated by temperature programmed gaschromatography. The same method can also be applied to the determination of the contents of styrene and oligostyrenes in commercial polystyrenes prepared by radical polymerization. It is found that the DIN 53719 method for determining styrene in polystyrene includes also unsaturated oligomers. The sum of the monomer and oligomer contents determined by gaschromatography is in agreement with the amount of the methanol-soluble portion determined according to the DIN 53718 method.
    Notes: Kationisch erhaltene Gemische aus Styrol und Oligostyrolen mit Polymerisations-graden von 2 bis 5 lassen sich durch temperaturprogrammierte Gaschromatographie trennen. Mit dem gleichen Verfahren kann auch der Gehalt an Styrol und Oligostyrolen in radikalisch hergestellten technischen Polystyrolen ermittelt werden. Hierbei ergibt sich, daß bei der Bestimmung von Styrol in Polystyrol nach DIN 53719 auch ungesättigte Oligomere erfaßt werden. Die Summe des gaschromato-graphisch bestimmten Monomer- und Oligomergehaltes stimmt mit dem nach DIN 53718 erhaltenen methanollöslichen Anteil überein.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1967.050010102
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  • 7
    Electronic Resource
    Electronic Resource
    Das Verhalten von Mono- und Diorganylphosphinsulfiden gegenüber Metallcarbonylsystemen, IX. Das Verhalten von Mono- und Diorganylphosphinsulfiden gegenüber Metallcarbonylsystemen, IX. Über Reaktionen an der SH-Gruppe von Pentacarbonyl-(mercaptodimethylphospin)chrom(O) (1976)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 109 (1976), S. 3323-3330 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Behavior of Mono- and Diorganylphosphine Sulfides towards Metal Carbonyl Systems, IXReactions with the SH Group of Pentacarbonyl(mercaptodimethylphosphine)chromium(O)The acidic SH group in the complex (OC)5CrP(CH3)2SH (1) can be methylated with CH2N2 to give 2. The anion in 3a, b is obtained by reaction of N(C2H5)3 or sodium with 1. The binuclear via phosphorus and sulfur linked dichromate anion in 5 Results from 3a and (OC)5CrTHF. The i. r., 1H, and 31P n. m. r. spectra of the new prepared compounds 2, 3a, b, and 5 as well as a correlation between the 31P n. m. r. spectra and v(P-S) are discussed.
    Notes: Die acide SH-Gruppe im Komplex (OC)5CrP(CH3)2SH (1) läßt sich mit CH2N2 zu 2 methylieren. Das Anion in 3a, b erhält man durch Einwirkung von N(C2H5)3 oder Natrium auf 1. Aus 3a und (OC)5CrTHF entsteht das zweikernige, über Phosphor und Schwefel verbrückte Dichromat-Anion in 5. Die IR-, 1H- und 31P-NMR-Spektren der neu dargestellten Verbindungen 2, 3a, b and 5 sowie ein Zusammenhang zwischen den 31P-NMR-Spektren und v(P-S) werden diskutiert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19761091007
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  • 8
    Electronic Resource
    Electronic Resource
    Totalsynthese optisch aktiver Steroide, XVII. Synthese von A, 19-Dinorsteroiden (1980)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 2249-2254 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Total Synthesis of Optically Active Steroids, XVII. Synthesis of A, 19-DinorsteroidsA,19-Dinorsteroids 3a - c are synthesized by addition of the β-ketoester 5b to the optically active trans-ketosulfones 6a - c (CD-fragment) followed by a kinetically controlled ringclosure-reaction.
    Notes: A,19-Dinorsteroide 3a - c werden durch Addition des β-Ketoesters 5b an die optisch aktiven trans-Ketosulfone 6a - c (CD-Baustein) und einen kinetisch kontrollierten A-Ringschluß dargestellt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19801130619
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  • 9
    Electronic Resource
    Electronic Resource
    Die Helvetica Chimica Acta und die Vitamine (1993)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 76 (1993), S. 1-59 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 75 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19930760102
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  • 10
    Electronic Resource
    Electronic Resource
    116. Eine neue Generation strukturierter Packungen: MellapakPlus (1999)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 71 (1999), S. 1018-1019 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.3307109120
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