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  • Articles  (138)
  • 1985-1989  (99)
  • 1965-1969  (39)
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  • 1
    Electronic Resource
    Electronic Resource
    Carbohydrates of influenza virus. Structure of the oligosaccharides linked to asparagines 406 and 478 in the hemagglutinin of fowl plague virus, strain dutch (1987)
    Springer
    Glycoconjugate journal 4 (1987), S. 17-32 
    Details
    ISSN: 1573-4986
    Keywords: influenza virus ; hemagglutinin ; glycoprotein glycans ; oligosaccharide structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Fowl plague virus, strain Dutch, was metabolically labeled withd-[2-3H]mannose, or withd-[6-3H]glucosamine, and the small subunit (HA2; 0.8 mg in total) of the viral hemagglutinin was isolated by preparative sodium dodecylsulfate-polyacrylamide gel electrophoresis. After proteolytic digestion, the radioactive oligosaccharides were sequentially liberated from the glycopeptides by treatment with different endo-β-N-acetylglucosaminidases and with peptide:N-glycosidase or, finally, by hydrazinolysis. In this manner, four groups of glycans could be obtained by consecutive gel filtrations and were subfractionated by HPLC. The structures of the individual oligosaccharides were analyzed by micromethylation, by acetolysis or by digestion with exoglycosidases. The major species amongst the high mannose glycans at Ans-406 of the viral glycopolypeptide were found to be Manα1-2Manα1-3(Manα1-2Manα1-6)Manα1-6(Manα1-2Manα1-2Manα1-3)Manβ1-4GlcNacβ1-4GlcNAc and Manα1-3(Manα1-2Manα1-6)Manα1-6(Manα1-2Manα1-2Manα1-3)Manβ1-4GlcNAcβ1-4GlcNAc, while the complex glycans at Asn-478 are predominantly GlcNAcβ1-2Manα1-3(GlcNAcβ1-2Manα1-6)Manβ1-4GlcNAcβ1-4GlcNAc (lacking, in part, one of the outerN-acetylglucosamine residues) and GlcNAcβ1-2Manα1-3(Galβ1-4GlcNAcβ1-2Manα1-6)Manβ1-4GlcNAcβ1-4GlcNAc.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01048441
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  • 2
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    Carbohydrates of influenza virus. Structure of the oligosaccharides linked to asparagines 406 and 478 in the hemagglutinin of fowl plague virus, strain dutch (1987)
    Springer
    Details
    Publication Date: 1987-01-01
    Print ISSN: 0282-0080
    Electronic ISSN: 1573-4986
    Topics: Chemistry and Pharmacology
    Published by Springer
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    PAPER CURRENT
  • 3
    Electronic Resource
    Electronic Resource
    Spectra and structure of small ring compounds. XLVIII. Conformational stability of methylcyclobutane from low frequency Raman data of the gas (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 86 (1987), S. 545-551 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The low frequency (500–80 cm−1) Raman spectra of gaseous methylcyclobutane, c-C4H7CH3, and methyl-d3-cyclobutane have been recorded. A series of Q branches beginning at 161 cm−1 for the light molecule and 154 cm−1 for the d3 compound with successive transitions falling to lower frequencies have been assigned to the ring puckering vibrations of both the low energy equatorial and high energy axial conformers. These data have been fitted to an asymmetric potential function of the form: V(cm−1)=(4.78±0.10)×105X4−(3.08±0.04)×104X2 +(2.18±0.1)×104X3 with an assumed reduced mass of 160 amu for the light compound. Utilizing this potential the difference between the puckering angles for the two conformers was calculated to be 4.3° with the equatorial conformer having the larger value of 20.7°. A similar potential was obtained for the d3 molecule. The energy difference between the equatorial and axial forms was found to be 247±20 cm−1 (706 cal/mol) and a barrier of 641±20 cm−1 (1.83 kcal/mol) was found for the interconversion. Experimental values for the ΔH of both the liquid (354±179 cm−1) and gas (295±75 cm−1) from relative intensities of different Raman band pairs over 85 and 37 °C temperature ranges, respectively, were found to be consistent with the value obtained from the potential function. These results are compared to the corresponding quantities for similar molecules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.452305
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  • 4
    Electronic Resource
    Electronic Resource
    USE OF GEOPHYSICAL MEASUREMENTS IN LUNAR SURFACE ANALYSIS (1965)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 123 (1965), 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.1749-6632.1965.tb20425.x
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  • 5
    Electronic Resource
    Electronic Resource
    Spectral characteristics of plasma emission during ArF excimer laser ablation of YBa2Cu3O7 (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 469-471 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In order to characterize the laser ablation process as it relates to the deposition of high Tc superconducting thin films, optical emission spectra produced during ArF excimer laser ablation of the high Tc superconductor YBa2Cu3O7 were studied. The population of excited states within the gas phase blow-off material depends strongly on excimer laser fluence at 193 nm. Ablation using relatively low excimer laser fluences produces a significant fraction of YO in the gas phase. The plasmas derived from ablation of targets made from the high Tc material are similar to plasmas observed from ablation of the individual components BaCO3, CuO, and Y2O3.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.101555
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  • 6
    Electronic Resource
    Electronic Resource
    Spectra and structure of small ring compounds. 46. Infrared and Raman spectra, conformational stability, and vibrational assignment of cyclobutylsilane (1985)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 89 (1985), S. 4307-4317 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100266a032
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  • 7
    Electronic Resource
    Electronic Resource
    Spectra and structure of small ring compounds. 54. Infrared and Raman spectra, conformational stability, and vibrational assignment of cyclobutylgermane (1989)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 93 (1989), S. 6296-6303 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100354a008
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  • 8
    Electronic Resource
    Electronic Resource
    Zur faziellen Entwicklung des subbetischen Juras in Südspanien (1967)
    Springer
    International journal of earth sciences 56 (1967), S. 973-992 
    Details
    ISSN: 1437-3262
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Abstract The facies development of the Jurassic in the subbetic realm of Spain shows many common features on the whole in spite of differences in detail. “Neritic limestone facies“ may be distinguished from “Nodular limestone facies“ and “Limestone-marl-facies“. This paper deals with the stratigraphie range of red nodular limestones and “Limonite Crusts“ as equivalents of the celtiberic “Boundary Oolites“. The occurrence ofNucleata, Pygope andPosidonia in the Subbetic is discussed. There are certain facies relations to the Jurassic of the adjacent celtiberic area and especially to the Jurassic of the Western and Southern Alps.
    Abstract: Résumé Les faciès dans le Jurassique subbétique montrent, malgré des différences dans les détails beaucoup de traits communs. Il faut cependant distinguer entre le « faciès des calcaires néritiques», le « faciès des calcaires noduleux» et le « faciès des marnes et calcaires». La distribution stratigraphique des calcaires noduleux rouges et des « croutes de limonite», qui représentent les équivalents des «oolites limitrophes» celtibériques, est discuté. On commente alors l'existence deNucleata, Pygope etPosidonia dans le Subbétique. On peut constater des relations plus ou moins nettes non seulement avec le Jurassique celtibérique, mais aussi, avant tout, avec le Jurassique alpin occidental et méridional.
    Notes: Zusammenfassung Die fazielle Entwicklung des subbetischen Juras weist trotz Differenzierung im einzelnen viele gemeinsame Züge auf. Grundsätzlich ist aber zwischen einer „Neritischen Kalk-Fazies“ einer „Knollenkalk-Fazies“ und einer „Kalk-MergelFazies“ zu unterscheiden. Auf die stratigraphische Verbreitung der Roten Knollenkalke und die „Limonitkrusten“ als Äquivalente der keltiberischen „Grenzoolithe“ wird näher eingegangen, das Auftreten vonNucleata, Pygope undPosidonia im subbetisehen Jura besprochen. Sowohl zum benachbarten keltiberischen Jura als auch zum west- und südalpinen Jura sind mehr oder weniger deutliche Beziehungen vorhanden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01848775
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  • 9
    Electronic Resource
    Electronic Resource
    Studien zur Benzotropolonbildung aus 3-Hydroxy-o-benzochinon (1967)
    Springer
    Monatshefte für Chemie 98 (1967), S. 852-873 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract The formation of benzotropolone compounds from catechol and pyrogallol derivatives depends upon the type, size, and position of the substituents in the reactants. Electrophilic substituents can be installed only in the 5-position of pyrogallol without loosing the capability of forming benzotropolones. This behavior is explained by the symmetrical electronic structure of the anion acting as 1.3-dipole. Pyrogallols, substituted in the 4- and 6-position by either methyl-, ethyl- or phenyl-groups, yield benzotropolones with 3-methoxy-o-benzoquinone. Isopropyl- andtert. butyl-groups in the same positions hinder benzotropolone formation because of steric hindrance. It was attempted to clarify the effect of the factors on the reaction mechanism by analysis of mixtures of benzotropolones, formed by oxidative coupling of catechol derivatives with pyrogallol-derivatives. On account of deficient yields this could not be done.
    Notes: Zusammenfassung Die Benzotropolonbildung aus Brenzcatechin- und Pyrogallolderivaten hängt von Art, Größe und Stellung der Substituenten in den Reaktionspartnern ab. Nur in die 5-Stellung des Pyrogallols können elektrophile Substituenten eingebaut werden, ohne daß die Fähigkeit zur Benzotropolonbildung verlorengeht. Dieses Verhalten wird durch die Symmetrie der elektronischen Struktur des als 1,3-Dipol wirkenden Anions erklärt. In 4- und 6-Stellung durch Methyl-, Äthyl- und Phenylgruppen substituierte Pyrogallole liefern mit 3-Methoxy-o-benzochinon Benzotropolone; Isopropyl- undtert. Butylgruppen in den gleichen Positionen verhindern aus sterischen Gründen die Benzotropolonbildung. Es wird versucht, aus der Produktanalyse von Benzotropolongemischen, die durch oxydative Verknüpfung von Brenzcatechinderivaten mit Pyrogallolderivaten hervorgegangen sind, Einblick in die den Mechanismus bestimmenden Faktoren zu erhalten. Verbindliche Aussagen hierüber werden durch die mangelhaften Stoffbildungen unmöglich gemacht.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00901389
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  • 10
    Electronic Resource
    Electronic Resource
    Assembly of micelles into higher-order structures with increasing salt concentration (1987)
    [s.l.] : Nature Publishing Group
    Nature 327 (1987), S. 321-324 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] For this study we used mixtures of 1-10% by weight each of surfactant and co-surfactant dissolved in salt solutions. The phase behaviour of such systems has recently been described by Benton and Miller4, who found that progressive addition of salt to an aqueous micellar dispersion (I) results in ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/327321a0
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