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  • Springer  (9)
  • American Chemical Society  (6)
  • Molecular Diversity Preservation International
  • PANGAEA
  • 1970-1974  (12)
  • 1955-1959  (3)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of medicinal chemistry 16 (1973), S. 1056-1057 
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 42 (1970), S. 517-518 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 31 (1959), S. 981-985 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 26 (1970), S. 1189-1191 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Resumen Se describe la sintesis y prueba de estructura del 3-acetato de (20 S, 21 R)-3β-hidroxi-21-amino-14β, 21-oxidonorcolan-23-oico ácido lactama, el cúal es el derivativo lactama de digitoxigenina. Dicho compuesto posée insignificantes efectos inotrópicos, pero inhibe o retarda la acción inotrópica positiva del 3-acetato de digitoxigenina cuando se ensaya en atria izquierda aislada de cochinillo de Indias o conejo.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Möglichkeit der Verwendung der Flammenphotometrie zur quantitativen Bestimmung einiger Elemente, die sich häufig in Eisenlegierungen finden, wurde untersucht. Besonders Kobalt, Nickel, Chrom und Mangan wurden hierbei in Betracht gezogen. Die Empfindlichkeit der Flammenphotometrie für diese Elemente ist gering. Deren Emission wird durch hohe Eisenkonzentrationen beeinträchtigt, auch wenn der Gehalt an Nickel und Chrom im Stahl beträchtlich ist. Daher muß das Eisen vorher abgetrennt werden. Dies wurde durch Extraktion mit organischen Lösungsmitteln durchgeführt, da festgestellt werden konnte, daß sich die übrigen Elemente in den von Eisen befreiten Lösungen quantitativ auffinden lassen. Weiters wurde die gegenseitige Störung dieser Elemente untersucht, um auf allenfalls dadurch bedingte Fehler aufmerksam zu werden. Die vorhergehende Abtrennung des Nickels und die dazu geeigneten Methoden werden erörtert. Einige Analysenergebnisse von verschiedenen Stählen und Mangan-Eisen-Legierungen werden angeführt. Die sich zwischen photometrischer und chemischer Analyse ergebenden Differenzen werden angegeben.
    Abstract: Summary A study has been made of the use of the flame photometer for determining quantitatively some of the elements found in various ferrous alloys. Among these elements, special studies have been made of cobalt, nickel, chromium, manganese. The sensitivity by the high concentration of iron in the samples, even in steels containing much nickel and chromium. Consequently, the iron should be removed beforehand. The writers accomplished this by extraction with organic liquids, after they studied the quantitative recovery of other metals in solutions freed of iron. A study has also been made of the mutual interferences of these elements to arrive at conclusions regarding the errors which may appear during the course of the measurements. A discussion is given of the preliminary separation of nickel and the procedures. Analyses of different samples of steel and ferromanganese are reported. The differences between the photometric values and those obtained by chemical methods are also pointed out.
    Notes: Résumé On a étudié les possibilités de l'usage du photomètre de flamme pour la détermination quantitative de quelques éléments fréquents dans diverses alliages ferreuses. Parmi ces éléments on a étudié spécialment le cobalt, le nickel, le chrome et le manganèse. La sensibilité de ces éléments dans les méthodes de photométrie de flamme est petite et leur émissions sont affectées par la grande concentration du fer des échantillons, même dans les aciers avec des teneurs élevées de nickel et de chrome. On doit donc faire une séparation préalable du fer, que nous avons effectuée par extraction avec des solvants organiques, ayant étudié de même les récupérations quantitatives des autres métaux dans les solutions privées de fer. D'autre part on a étudié les interférences mutuelles de ces éléments pour arriver à des conclusions sur les erreurs que peuvent apparaître on cours des mesures. On discute aussi la séparation préalable du nickel et les modes opératoires. Quelques résultats sont donnés sur l'analyse de divers échantillons d'acier et de ferromanganèse. Les différences entre les valeurs photométriques et obtenues par voie chimique sont aussi indiquées.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Contributions to mineralogy and petrology 44 (1974), S. 139-147 
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract This paper describes the use of pyroxene compounds of clinopiroxene in mafic and ultramafic rocks (inclusions and layered outcrops) in the Canary Islands as geobarometric indicators of the depth of formation of different rock types. The upper mantle origin of peridotite and gabbro inclusions was confirmed, while a crustal character is proposed for the layered complexes. Finally, a scheme of Canary substrate is outlined.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary 1. Treatment of Streptomyces albus G with lysozyme (mg dry weight mycelium/mg lysozyme = 2–3/1) leads to the isolation of membrane fractions whose yields amount to 12–20% of the total celullar protein depending upon the age and state of the bacterial culture. 2. The isolated fractions are composed of 52.7 per cent protein and 41 per cent lipid with minor amounts of hexose (2.3–2.4%), hexosamines (1.6–2.1%), RNA (2%) and DNA (0.45%). They possess a chemical composition similar to that of other membrane systems. 3. NADH oxidase activities are associated with the membrane fractions from cells of 18–20 h of age. These activities are not detected in the membrane fractions from older cells. 4. All membrane fractions shape small vesicles. Differences in size and shape are, however, found between membrane preparations from cells of distinct ages. 5. dd-carboxypeptidase is not selectively localized in a membrane fraction of a certain age. The subcellular distribution of this activity is similar to that of other lytic endopeptidases of S. albus G. 6. The amounts of dd-carboxypeptidase associated with the various membrane fractions are variable and never very high. The specificity of the dd-carboxypeptidase activity associated with membrane fractions differs from that of the soluble enzyme. 7. These results are discussed in relationship with the carboxypeptidase-transpeptidase hypothesis (Leyh-Bouille et al., 1970).
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Molecular biology reports 1 (1973), S. 27-32 
    ISSN: 1573-4978
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract 3H-puromycin binds to bacterial ribosomes, in the presence of ethanol, under the experimental conditions of the fragment reaction assay. The binding is feeble, takes place at 0°C, is partially inhibited by chloramphenicol and lincomycin and totally by sparsomycin. 3H-puromycin binding is hardly affected by the 3′ aminonucleoside of puromycin, is well inhibited by the L-Phenylalanine and L-Leucine analogues of puromycin and totally blocked by L-Phenylalanyl-adenosine.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Molecular biology reports 1 (1973), S. 75-79 
    ISSN: 1573-4978
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract There might be an undetermined order in the interaction of the substrates with the ribosomes in the reaction of CACCA-Leu-Ac with puromycin to form Ac-Leu-puromycin and CACCA (‘fragment reaction’). Km 0°=6×10-4 M for the puromycin · ribosome interaction. Chloramphenicol totally blocks the ‘fragment reaction’ as a consequence of a single interaction with the ribosome of Kd 0°=2.2×10-6 M. The inhibition by chloramphenicol of the ‘fragment reaction’ is mixed competitive for puromycin.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A bimodal temperature response is observed in the germination of seeds in Jussiaea suffruticosa, both under continuous and cyclic light treatments. Germination exhibits two maxima at around 25° C and at 40°, and a minimum in the region of 30–35°. The response depends on light intensity both under continuous and intermittent light treatments. This dependence is much more noticeable in the region of minimum germination (30°). Both preincubation in darkness at 35° and high light intensities (15 500 lux) tend to eliminate the bimodal temperature response.
    Type of Medium: Electronic Resource
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