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  • 1
    ISSN: 1436-6215
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Description / Table of Contents: Summary The zinc content of the liver and the thigh muscle of the rat were measured by means of atomic absorption spectrophotometry under different conditions: standard diet, carbohydrate diet, an experimental dystrophy model and its recovery period. The influence of a parental mineral substitution on the whole body and the organ weight was studied. Carbohydrate diet caused a lower rise of the whole body weight, a decrease of the zinc content of the liver and an increase of the zinc content of the thigh muscle. In dystrophy model, the liver weight decreased to one fifth of the controls. The zinc concentration of the liver increased markedly, the zinc content of the whole liver is equal to that of control animals. The thigh muscle showed an increase of the zinc content, too. The parenteral mineral application had no effect upon the whole body weight and the organ weights. Little influences on the zinc content of the skeletal muscle were seen. The zinc content of parenchymatous organs varies markedly, and it is influenced by diets and disease. In the dystrophy model, zinc is concentrated in atrophic organs in order to protect the organism against zinc deficiency.
    Notes: Zusammenfassung Der Zinkgehalt der Leber und der Oberschenkelmuskulatur der Ratte wurde nach einseitiger Kohlenhydratdiät, einem experimentellen Dystrophiemodell sowie nach dessen Erholungsphase untersucht. Es wurde der Einfluß einer parenteralen Substitution organischer bzw. anorganischer Mineralverbindungen auf das Gesamtkörpergewicht, das Organgewicht und die Organ-Zink-Konzentration verfolgt. Die einseitige Diät führt zu einer retardierten Entwicklung der Versuchstiere und zu einer Umverteilung von Zink aus der Leber in die Skeletmuskulatur. Das Dystrophiemodell reduziert das Lebergewicht durch Atrophie der Hepatozyten auf ein Fünftel des Normalgewichts. Die relative Zinkkonzentration steigt dabei so an, daß der Gesamtzinkgehalt in der Leber unverändert bleibt. In geringerem Ausmaß konzentriert die Skeletmuskulatur Zink in den atrophischen Muskelfasern. In der Erholungsphase hat die parenterale Gabe organischer oder anorganischer Metallverbindungen keinen Einfluß auf das Körpergewicht, das Organgewicht und m. E. den Zinkgehalt der Organe. Die Zinkkonzentrationen der parenchymatösen Organe sind somit Variable, die durch Stoffwechseleinflüsse und Krankheit beeinflußt werden.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-203X
    Keywords: Green bean ; Phaseolus vulgaris L ; Genetic transformation ; Stable integration ; chalcone synthase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Kanamycin resistant callus was produced from leaf disc or hypocotyl expiants of green bean (Phaseolus vulgaris L.) when cultured on a defined medium containing 50 mg/l kanamycin after 4 days of co-cultivation with Agrobacterium tumefaciens strain EHA101 containing the binary vector pKYLX71GUS. The presence of neomycin phosphotransferase II (NPT-II) in crude cellular extracts from the kanamycin resistant callus was confirmed by ELISA. The expression of the ß-glucuronidase (GUS) reporter gene was confirmed by histochemical and fluorimetric analyses. Southern blot border analysis confirmed the integration of the foreign DNA. In addition to the evidence obtained from Southern analysis, the absence of Agrobacterium in the transformed callus cultures was confirmed by microscopic observation and through test cultures. Using the above protocol, bean callus cultures were also transformed with a bean chalcone synthase promoter-GUS fusion. These cultures, when treated with the elicitor glutathione, showed higher levels of GUS expression than the unelicited callus clumps.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 321 (1985), S. 653-654 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary The determination of hydrogencarbonate in high-purity water applying ion-chromatography with indirect UV-detection is described. The results have been obtained using a low-capacity analytical ion-exchange column and eluents containing very pure weak organic acids. By direct injection of the sample concentration levels lower than 0.02 mg/l CO 3 2− have been detected.
    Notes: Zusammenfassung Die vorliegende Arbeit beschreibt eine Methode zur quantitativen Bestimmung geringer Konzentrationen an Hydrogencarbonat in reinen Wässern. Angewendet wurde die Ionen-Chromatographie ohne Suppressortechnik unter Einsatz eines variablen UV-VIS-Detektors. Die aufgezeigten Ergebnisse wurden erzielt unter Verwendung einer analytischen Ionenaustauschersäule sehr geringer Kapazität sowie mit hochreinen Laufmitteln schwacher Elutionskraft. Bei direkter Injektion der Proben ließen sich weniger als 0,02 mg/l CO 3 2− nachweisen.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 320 (1985), S. 485-489 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary Ion Chromatography is described as an alternative to traditional methods for quantitative determination of inorganic anions. Interest is focussed now to the development of the ion-chromatographic determination of anions related to weak acids. Chromatographic behaviour of carbonate species in water is studied applying “single-column ion chromatography”. The detection of the carbonate species has been carried out using a conductivity detector with electronic suppression as well as an indirect UV-detector. Two different anion-exchange columns have been proved, successfully.
    Notes: Zusammenfassung Die Ionen-Chromatographie stellt eine quantitative Bestimmungsmethode von Anionen dar und läßt sich als Alternative zu herkömmlichen Nachweisverfahren einsetzen. Das gilt auch für die Bestimmung von Ionen schwach dissoziierender Säuren. Die vorliegende Arbeit beschreibt das Verhalten von CO 3 2− , HCO3 −, bzw. CO2 in der Ionen-Chromatographie. Angewandt wurde hierbei die Ionen-Chromatographie ohne Suppressortechnik unter Einsatz eines Leitfähigkeitsdetektors mit elektronischer Unter grundkompensation bzw. eines variablen UV-VIS-Spektral-photometers. Zur Abtrennung und Bestimmung der Carbonatspecies wurden zwei analytische Anionenaustauschersäulen erfolgreich eingesetzt.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 325 (1986), S. 252-254 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary In single-column ion chromatography frequently a „system peak” is observed, which is marked as hydrogencarbonate peak in a great number of publications. The area and direction of the system peak depends on the pH-value of the sample as well as on the eluent. In addition a correlation between the hydrogencarbonate concentration and system peak has been proved. The correlation HCO 3 − system peak is studied and the results are described in this paper.
    Notes: Zusammenfassung Bei der Ionen-Chromatographie ohne Suppressortechnik tritt häufig ein Systempeak im Chromatogramm auf, der in Veröffentlichungen teilweise auch als Hydrogencarbonat-Peak ausgewiesen wird. Die Größe und Richtung des Systempeaks hängen vom pH-Wert der Probe und des Laufmittels ab. Zusätzlich tritt eine Korrelation mit dem Carbonatgehalt der Probe auf, deren Ursache wir untersucht haben.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 327 (1987), S. 213-219 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The control of water quality is often performed by analysis of organic group parameters, e.g., “Adsorbable Organic Halogen (AOX)”. The differentiation of the group parameter AOX and the determination of the parameter “Adsorbable Organic Sulfur Compounds (AOS)” can be performed by ion-chromatography for detection of the anions obtained after pyrohydrolysis of the organic adsorbed compounds. Investigations concerning pyrohydrolysis of organic solutes and enrichment on a nearly chlorine- and sulfur-free active charcoal have been performed. By means of this charcoal the determination of organic sulfur solutes in the μg/l range can be realized.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1573-9368
    Keywords: Peanut ; Arachis hypogaea ; transformation ; callus ; Agrobacterium tumefaciens ; peanut stripe virus coat protein
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Transformed callus was produced from peanut (Arachis hypogaea L. cv. Okrun) hypocotyl explants after four days of co-cultivation withAgrobacterium tumefaciens strains EHA101, LBA4404 or ASE1 carrying the binary vector pKYLX71GUS on a defined medium followed by selection with kanamycin (200 mg l−1). Transformed calluses were cultured as independent cell lines potentially derived from a single transformation event. Stable integration and expression of foreign gene(s) in the callus was confirmed by Southern and western blot analyses and enzyme assays. A few cell lines showed a single insert of the foreign gene. Using the above protocol, transformed peanut callus expressing the peanut stripe virus coat protein gene was obtained.
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Experimental mechanics 12 (1972), S. 543-548 
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Holographic measurements of an idealized cantilever beam under end-loading and uniform-loading conditions are simulated on a computer. Cubic splines are fitted to the simulated data and then used to evaluate the shear strain and bending moment. Controlled data errors are introduced into the simulated measurements and the strain and bending-moment results are compared with the known analytic results. When the data are not resolution limited, the accuracy of the results increases as more cubic splines are taken. However, when the data are resolution limited, the accuracy of the results is a maximum for an optimum number of cubic splines and the use of more splines actually decreases the accuracy.
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  • 9
  • 10
    Publication Date: 2020-07-01
    Description: This paper describes precision measurements of the transverse momentum $$p_mathrm {T}^{ell ell }$$pTℓℓ ($$ell =e,mu $$ℓ=e,μ) and of the angular variable $$phi ^{*}_{eta }$$ϕη∗ distributions of Drell–Yan lepton pairs in a mass range of 66–116 GeV. The analysis uses data from 36.1 fb$$^{-1}$$-1 of proton–proton collisions at a centre-of-mass energy of $$sqrt{s}=13,$$s=13TeV collected by the ATLAS experiment at the LHC in 2015 and 2016. Measurements in electron-pair and muon-pair final states are performed in the same fiducial volumes, corrected for detector effects, and combined. Compared to previous measurements in proton–proton collisions at $$sqrt{s}=7$$s=7 and $$8,$$8TeV, these new measurements probe perturbative QCD at a higher centre-of-mass energy with a different composition of initial states. They reach a precision of 0.2$$\%$$% for the normalized spectra at low values of $$p_mathrm {T}^{ell ell }$$pTℓℓ. The data are compared with different QCD predictions, where it is found that predictions based on resummation approaches can describe the full spectrum within uncertainties.
    Print ISSN: 1434-6044
    Electronic ISSN: 1434-6052
    Topics: Physics
    Published by Springer
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