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  • Springer  (34)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European journal of nutrition 36 (1997), S. 198-201 
    ISSN: 1436-6215
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 18 (1962), S. 79-80 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung 1957 sind vonHajdu et al. Versuche veröffentlicht worden, wonach sich aus verschiedenen Geweben eine Substanz mit Herzglykosid-ähnlicher Wirkung auf Kaltblüterherzen extrahieren lässt, welche als β-Palmitoyl-lysolecithin interpretiert wurde. In unseren Versuchen wurde aus Hefe Dipalmitoleyl-lecithin isoliert und daraus durch enzymatische Abspaltung der α-ständigen Fettsäure und anschliessende katalytische Hydrierung reines, hämolytisch wirksames β-Palmitoyl-lysolecithin hergestellt. Diese Verbindung zeigte jedoch keine den Effekten der Herzglykoside verwandte Wirkung am isolierten Meerschweinchenventrikel sowie an menschlichen Erythrocyten.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 18 (1962), S. 314-315 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Previous experiments indicating antagonistic effects of cardiac glycosides and corticosteroids on ion transport in red cells and published independently from our own laboratories1 and byBernstein 2 could not be repeated under a variety of experimental conditions.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Informatik, Forschung und Entwicklung 13 (1998), S. 79-89 
    ISSN: 0949-2925
    Keywords: Schlüsselwörter:Datenbanksystem, SQL, Tertiärspeicher, anwendungsorientiertes Archivieren, datenbankintegriertes Archivieren ; Key words: database system, SQL, tertiary storage, application–oriented archiving, database–integrated archiving ; CR Subject Classification:H.2.3, H.2.4, H.2.7
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Abstract. Nowadays, databases in an order of one hundred gigabytes are not uncommon, databases containing terabytes of data do already exist. This leads to high costs of storage as well as to problems in database administration and performance. Appropriate archiving functionality for database management systems (DBMS) using inexpensive tertiary storage provides a solution. In this paper we motivate the archiving approach in database systems and introduce the notion of application–oriented ar chiving. An extension of SQL as an interface for integrated archiving functionality is described. Implementation aspects are discussed with a DBMS–based prototype.
    Notes: Zusammenfassung. Datenbanken in der Größenordnung von hundert Gigabytes sind heute nicht ungewöhnlich, auch Terabytes–Datenbanken existieren bereits. Das führt zu hohen Speicherkosten sowie zu Problemen bei der Datenbankadministration und Performance. Geeignete Archivierungsfunktionalität für Datenbank–Management–Systeme (DBMS) unter Verwendung von kostengünstigem Tertiärspeicher stellt eine Lösung dar. In dem v orliegenden Papier motivieren wir den Archivierungsansatz für Datenbanksysteme und stellen den Begriff des anwendungsorientierten Archivierens vor. Eine Erweiterung von SQL als eine Schnittstelle für integrierte Archivierungsfunktionalität wird beschrieben. Implementierungsaspekte werden anhand eines DBMS–basierten Prototypen diskutiert.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 125 (1994), S. 1129-1143 
    ISSN: 1434-4475
    Keywords: Pyrimidine-5-thioles ; Thiazolidine-2,4-diones ; Thiazoline-2-ones ; Thiazoline-2-thiones ; Thiazolo[4,5-e]isothiazoles ; Thiazolo[4,5-d]pyrimidines
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary 6-Amino-thiazolo[4,5-c]isothiazole derivatives4 are obtained by addition of hydrogen sulfide to the 4-Amino-thiazoline-5-carbonitrile2 followed by cyclooxidation of the intermediate thioamides3. In the presence of sodium sulfite the hydrolysis of the4-amino-2-methylthio-thiazolium salts5 derived from the title compounds1 yields the4-amino-thiazolin-2-ones6. By their further hydrolysis the 2,4-dioxo-thiazolidin-5-carboxamides8 are formed. The 2-oxo-and 2-thioxo-thiazolo [4,5-d]pyrimidin-7-ones and -thiones available from1 undergo ring opening by hydrolysis to give the substituted 4-amino-6-oxo- and 4-amino-6-thioxo-pyrimidine-5-thiols15a–h and13i–e. They have been isolated as their disulfides14 or 5-alkyl derivativesi.e. the substituted 4-amino-5-alkylthiopyrimidin-6-ones and -thiones16. In analogy, the intermediate 6-amino-7-oxo-thiazolo[4,5-d] pyrimidin-2-thione18 and the 7-amino-thiazolo[4,5-d]-pyrimidin-2-thione24 derived from1 react by ring cleveage to yield the 1,4-and 4,6-diamino-pyrimidin-5-thiole derivatives22 and27, respectively, isolated as their disulfides or alkylthio-derivatives. From the pyrimidine16b the pyrimido[5,4-b]1,4-thiazine derivative18 can be obtained.
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 17 (1961), S. 480-480 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
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  • 7
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    Electronic Resource
    Springer
    Cellular and molecular life sciences 17 (1961), S. 97-106 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In this brief review, the development of modern quantitative methods for the cultivation of mammalien cellsin vitro is described, and present knowledge of their nutritional requirements is presented. In addition, some applications of these techniques in biochemistry, pharmacology, virology, genetics, and radiobiology are discussed.
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' journal of analytical chemistry 362 (1998), S. 130-136 
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A new process control methodology for the simultaneous determination of sugars, alcohols and organic acids in wine based on multivariate evaluation of mid-IR transmission spectra of wine samples is presented. In addition to ethanol several lower level wine components (glucose, fructose, glycerol, citric-, tartaric-, malic-, lactic- and acetic acid) were determined. To establish a multivariate calibration model a set of 72 calibration solutions was prepared and measured, using a novel, fully automated sequential injection (SI) system with Fourier transform infrared (FTIR) detection. The resulting spectra were evaluated using a partial least square (PLS) model. The developed PLS model was then applied to the analysis of real wine samples containing 79–91 g L–1 ethanol, 5.9–8.1 g L–1 glycerol, 0.4–6.9 g L–1 glucose, 1.5–7.5 g L–1 fructose, 0.3–1.6 g L–1 citric acid, 1.0–1.7 g L–1 tartaric acid, 0.02–3.2 g L–1 malic acid, 0.4–2.8 g L–1 lactic acid and 0.15–0.60 g L–1 acetic acid, yielding results which were in good agreement with those obtained by an external reference method (HPLC-IR). The short analysis time (less than 3 min) together with high reproducibility makes the newly developed method applicable to process control and screening purposes (average of the standard deviations calculated from four repetitive measurements of six different real samples: ethanol: 0.55 g L–1, glycerol: 0.037 g L–1, glucose: 0.056 g L–1, fructose: 0.036 g L–1, citric acid: 0.020 g L–1, tartaric acid: 0.010 g L–1, malic acid: 0.052 g L–1, lactic acid: 0.012 g L–1 and acetic acid: 0.026 g L–1).
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 46 (1959), S. 625-626 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 111 (1970), S. 75-89 
    ISSN: 1432-0878
    Keywords: Lymphocytes ; Replacement rate ; Autoradiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Bei jugendlichen erwachsenen, weiblichen Ratten wurden der Markierungsindex und die Markierungsintensität kleiner Lymphozyten und größerer lymphoider Zellen im zirkulierenden Blut und in Lymphknoten während und nach langzeitig wiederholten Injektionen von Thymidin-3H verfolgt. Die radioaktive Vorläufersubstanz wurde in 8stündigen Intervallen über eine Zeitdauer von 30 Tagen intramuskulär verabreicht. Unter der Annahme, daß es bei diesem Verfahren zu keinen nennenswerten radiogenen, pharmakologischen oder hormonalen Störungen kam, erscheinen die nachstehenden Schluß folgerungen gerechtfertigt: 1. Während des ersten Tages der Injektionsperiode wurden im Mittel 18% (Maximum: 29%) unmarkierte kleine Lymphozyten durch markierte ersetzt. Die Markierungsindices dieser Zellart im Blut, als Funktion der Zeit nach Beginn der wiederholten Injektionen von Thymidin-3H, ergaben eine Kurve, die um den 8. Tag herum 50% und nach 30 Tagen 79% (Maximum: 85%) erreicht. 2. Die Resultate lassen sich am ehesten mit der Annahme in Einklang bringen, daß die Häufigkeitsverteilung der verschiedenen Werte für die G 0-Zeit (Erklärung im Text), bzw. Verweiloder Rezirkulationsdauer, der kleinen Lymphozyten im peripheren Blut eine kontinuierliche ist und einen Gipfel bei einem bis mehreren Tagen aufweist. 3. Die größeren lymphoiden Zellen im peripheren Blut wurden in ihrer überwiegenden Mehrzahl wesentlich rascher umgesetzt als die kleinen Lymphozyten. 4. Der Markierungsindex der kleinen Lymphozyten in Lymphknotenausstrichen entsprach am Ende der Injektionsperiode demjenigen im peripheren Blut. Am Ende der Injektionsperiode fanden sich in den äußeren Rindenschichten der Lymphknoten, wo der schwer mobilisierbare Pool von Lymphozyten liegt, mindestens ebenso viele unmarkierte kleine Lymphozyten wie im zirkulierenden Blut. 5. Die Blutmonozyten waren 4 Tage nach Beginn der wiederholten Injektionen von Thymidin-3H zu 100% markiert und behielten diesen Markierungsindex während der restlichen Injektionsperiode bei. Die Befunde werden im Zusammenhang mit Fragen des Proliferationsmodus und der Wanderungsmöglichkeiten der Lymphozyten sowie ungenügender autoradiographischer Wirksamkeit besprochen und mit den von anderen Autoren mitgeteilten Resultaten nach kontinuierlicher intravenöser Infusion von Thymidin-3H verglichen.
    Notes: Summary Young adult female Sprague-Dawley rats were given intramuscular injections of thymidine-3H at 8-hour intervals for a period of 30 days in order to follow the labeling indices and labeling intensities of small lymphocytes and of large lymphoid cells in the circulating blood and lymph nodes. Assuming that radiotoxic, pharmacological and/or hormonal effects were negligible, the following conclusions seem to be justified: 1. During the first day of the injection period the labeling index of small lymphocytes in the peripheral blood rose from zero to an average of 18% (maximum: 29%). Labeling indices of this cell type in the circulating blood, as a function of time after onset of the labeling procedure, followed a curve which reached 50% around day 8 and 79% at the 30 day terminal interval. 2. Results can best be explained by the hypothesis that the frequency distribution of the values for G 0 time or residence (recirculation) time of small lymphocytes in the circulating blood is a continuous one and shows a marked peak from one to a few days. 3. Large lymphoid cells in the peripheral blood were replaced much more rapidly than small lymphocytes. 4. The labeling index of small lymphocytes in lymph node smears at the end of the injection period corresponded to that of small blood lymphocytes. Autoradiographs of histological sections revealed that the outer zones of the lymph node cortex which contains preferentially the more sessile pool of lymphocytes, contained as high a percentage of unlabeled small lymphocytes as did the circulating blood. 5. Blood monocytes were labeled to 100% 4 days after beginning repeated injections of thymidine-3H and maintained this labeling index throughout the labeling period. These results are discussed in respect to the proliferative pattern and migrational behavior of lymphocytes and to the problem of autoradiographic inefficiency. Data are compared to those obtained with continuous intravenous infusion of thymidine-3H.
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