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  • 11
    Electronic Resource
    Electronic Resource
    Histochemische Eigenschaften der unspezifischen Esterasen im Tanycytenependym des III. Ventrikels, im Subfornicalorgan und im Subcommissuralorgan der Wistarratte (1971)
    Springer
    Histochemistry and cell biology 28 (1971), S. 170-182 
    Details
    ISSN: 1432-119X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung An 40 männlichen Wistarratten wurden histochemisch differenzierbare Eigenschaften der unspezifischen Esterasen in den Tanycyten des III. Ventrikels, im Subfornicalorgan (SFO) und im Subcommissuralorgan (SCO) miteinander verglichen. Aus den Befunden geht hervor, daß die Esterasen des SFO in ihrem Verhalten denen der Tanycyten nahezu vollständig gleichen, während die Esterasen des SCO einen gänzlich anderen Typ verkörpern. Dieses Ergebnis könnte auf eine funktionelle Verwandtschaft von Tanycyten und Subfornicalorgan hinweisen.
    Notes: Summary In 40 male Wistar rats, a comparative study was made between the histochemically distinguishable properties of the unspecific esterases in the tanycytes of the third ventricle, in the subfornical organ (SFO) and in the subcommissural organ (SCO). The results show that the esterases of the SFO behave in an almost identical manner to those of the tanycytes, whereas the esterases of the SCO are of a completely different type. This finding could be an indication of a functional relationship between the tanycytes and the subfornical organ.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00279861
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  • 12
    Electronic Resource
    Electronic Resource
    Influence of various corticoids on the augmentation of “Gomori-positive” granules in the median eminence of the rat following adrenalectomy (1973)
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 280 (1973), S. 49-62 
    Details
    ISSN: 1432-1912
    Keywords: Corticotropin-Releasing Factor ; Corticoids ; Median Eminence ; Rat ; Histology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In 465 female Wistar rats the influence of an i.m. injection of various natural or synthetic corticoids on the augmentation of “Gomori-positive” granules in the outer layer of the median eminence following bilateral adrenalectomy has been investigated. While the augmentation of the granules is not impaired by progesterone it is inhibited or completely blocked, depending on the dose and the manner of application, by 11-desoxycorticosterone, corticosterone, cortisol, 9α-fluorocortisol, prednisolone, triamcinolone, dexamethasone and fluoroformylone. The doses necessary to suppress the augmentation of the granules correspond to those shown by other authors to be required for blocking ACTH-secretion. The inhibitory effect of the investigated corticoids on the augmentation of the granules is related to their antiphlogistic potency. The findings suggest that the amount of the “Gomori-positive” granules in the outer layer of the median eminence of the rat might be used as a parameter of the activity of the corticotropin-releasing factor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00505354
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  • 13
    Electronic Resource
    Electronic Resource
    Die Bildung von Spuren von Kohlenmonoxid durch Saccharomyces cerevisiae und andere Mikroorganismen (1974)
    Springer
    Archives of microbiology 100 (1974), S. 243-252 
    Details
    ISSN: 1432-072X
    Keywords: Saccharomyces cerevisiae ; Carbon Monoxide Trace-Measurement ; 14C-Glucose ; CO Production ; Atmospheric Cycle of Trace Gases
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung 1. Mit einer empfindlichen Analysenmethode, die auf die Reaktion CO+HgO→CO2+Hg basiert und den CO-Gehalt auf Grund der Absorption des freigesetzten Hg bei 2537 Å ermittelt, wurden im Gasraum über wachsenden Kulturen von Saccharomyces cerevisiae, S. oviformis, Escherichia coli, Aerobacter aerogenes, Pseudomonas spec. und Lactobacillus brevis 0.4–2.6 ppm CO nachgewiesen. Bei Lactobacillus arabinosus, Bacillus cereus var. mycoides und Aspergillus niger war eine CO-Bildung nicht meßbar. 2. Bei S. cerevisiae war die CO-Bildung bei Konzentrationen von 10–50 g Glucose pro Liter Medium am größten. Außerdem wurde die CO-Bildung proportional zum anfänglichen Sauerstoffgehalt im Gasraum über den Kulturen gefördert. 3. Mit 14C-markierter Glucose wurde nachgewiesen, daß CO aus Glucose entsteht. 4. Die CO-Bildung der untersuchten Mikroorganismen ist so gering, daß sie keine Bedeutung für den Kreislauf dieses Spurengases in der Atmosphäre hat.
    Notes: Summary 1. Growing cultures of Saccharomyces cerevisiae, S. oviformis, Escherichia coli, Aerobacter aerogenes, Pseudomonas spec. and Lactobacillus brevis produce trace amounts of CO (0.4–2.6 ppm) that can be detected in the gas space above the cultures using a sensitive analytical method based on the reaction CO+HgO→CO2+Hg. The liberated Hg is quantitatively measured by atomic absorption at 2537 Å. No CO could be detected above cultures of Lactobacillus arabinosus, Bacillus cereus var. mycoides and Aspergillus niger. 2. The maximum CO production by Saccharomyces was obtained with concentrations of 10–50 g glucose per liter medium. The amount of CO formed increased with the oxygen concentration in the gas space above the cultures. 3. Using 14C-glucose it was shown that S. cerevisiae forms CO from glucose. 4. The formation of CO by the microorganisms investigated is very small. The ratio of CO/CO2 produced is much smaller than in environmental air. Therefore it can be concluded that the production of CO by these microorganisms has probably no significance for the atmospheric cycle of this trace gas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00446321
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  • 14
    Electronic Resource
    Electronic Resource
    A behavioral correlate of blood-group discordance in dizygotic twins (1970)
    Springer
    Behavior genetics 1 (1970), S. 89-98 
    Details
    ISSN: 1573-3297
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Psychology
    Description / Table of Contents: Résumé La variance des scores du test d'intelligence verbale de Wechsler à l'intérieur de paires de jumeaux dizygotes a été comparée pour un groupe de jumeaux concordants et pour un groupe de jumeaux discordants pour chacun des quatre systèmes de groupes sanguins (ABO, MNSs, Rh, Duffy). On a trouvé une variance significativement supérieure chez les jumeaux discordants pour les systèmes Rh et Duffy. On envisage plusieurs explications possibles, mais il semble que la cause la plus probable soit le “linkage” entre la localisation du gène du groupe sanguin et d'un gène important pour l'intelligence verbale. ZUSAMMENFASSUNG-Die Intrapaarvarianz verbaler Intelligenztestscores (Wechsler) bei dizygoten Zwillingen mit übereinstimmender bzw. verschiedener Blutgruppe (ABO, MNSs, Rh, Duffy) wurde verglichen. Für zwei der vier untersuchten Blutgruppen (Rh und Duffy) wurde signifikant grössere Yarianz zwischen Zwillingen gefunden, die unterschiedlichen Blutgruppen angehörten. Verschiedene mögliche Erklärungen dieses Ergebnisses werden erwogen; “linkage” des Genortes für die betreffende Blutgruppe mit dem Locus eines der wichtigeren Gene für verbale Intelligenz wird als die wahrscheinlichste vorgeschlagen.
    Notes: Abstract Within pair variances of Wechsler verbal intelligence test scores have been compared for fraternal twins that are concordant and those that are discordant for each of four bloodgroup system (ABO, MNSs, Rh, Duffy). Significantly increased variances for twins discordant for the Rh system and for Duffy were found. Several possible explanations are considered but it is proposed that linkage between the bloodgroup locus and the locus of a major gene for verbal intelligence is the most likely cause.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01071824
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  • 15
    Electronic Resource
    Electronic Resource
    Fluoreszenzmikroskopischer Nachweis von Arginin im Neurosekret des Schweines mit Phenanthrenchinon (1971)
    Springer
    Cell & tissue research 122 (1971), S. 456-459 
    Details
    ISSN: 1432-0878
    Keywords: Neurosecretory material ; Carrier protein ; Arginine ; Phenanthrenequinone ; Pig
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Das Neurosekret im Hypophysenhinterlappen des Schweines enthält Arginin. Dieser in einer voraufgegangenen Untersuchung mit Hilfe der Ninhydrin-Reaktion erhobene Befund wird durch die vorliegende Mitteilung bestätigt, bei der zum Argininnachweis die Phenanthrenchinon-Reaktion benutzt wurde. Aus den Befunden ist zu folgern, daß das Neurosekret als Äquivalent der Trägerproteine anzusehen ist, da die Hormone selbst beim Schwein argininfrei sind.
    Notes: Summary By using the phenanthrenequinone-reaction it is shown that the neurosecretory material in the posterior lobe of the hypophysis in pigs contains arginine. This finding confirms results previously obtained by using the ninhydrine reaction. Since in pigs the hormones vasopressin and oxytocin are free of arginine, the findings indicate that the neurosecretory material represents the carrier proteins.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00936079
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  • 16
    Electronic Resource
    Electronic Resource
    Immunohistochemical demonstration of a CRF-associated neurophysin in the external zone of the rat median eminence (1974)
    Springer
    Cell & tissue research 152 (1974), S. 411-421 
    Details
    ISSN: 1432-0878
    Keywords: Median eminence (rat) ; External zone ; Adrenalectomy ; CRF-neurophysin ; Immunoperoxidase histochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In picric acid-formalin fixed, paraplast embedded median eminence sections from normal and bilaterally adrenalectomized rats, the amount of “Gomori-positive” neurosecretory material and the amount of protein, cross reacting against a porcine neurophysin-II antiserum were determined. In normal rats, “Gomori-positive” substances and neurophysin were confined to the internal zone of the median eminence. After adrenalectomy, however, “Gomori-positive” granules and a neurophysin-like protein also became apparent in the external zone. Their amount increases, if the animals are treated with DOCA from the 15th to the 21st day after the operation. The distribution of the neurophysin-like protein in the external zone is similar to that of the “Gomori-positive” granules. Since the granules are regarded as a morphological correlate of the corticotropin-releasing factor (CRF) it is assumed, that the protein, appearing in the external zone after adrenalectomy and cross-reacting against the neurophysin antiserum is a CRF-associated neurophysin. For this substance the name “CRF-neurophysin” is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00218928
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  • 17
    Electronic Resource
    Electronic Resource
    Fitting a response model forn dichotomously scored items (1970)
    Springer
    Psychometrika 35 (1970), S. 179-197 
    Details
    ISSN: 1860-0980
    Source: Springer Online Journal Archives 1860-2000
    Topics: Psychology
    Notes: Abstract A method of estimating the parameters of the normal ogive model for dichotomously scored item-responses by maximum likelihood is demonstrated. Although the procedure requires numerical integration in order to evaluate the likelihood equations, a computer implemented Newton-Raphson solution is shown to be straightforward in other respects. Empirical tests of the procedure show that the resulting estimates are very similar to those based on a conventional analysis of item “difficulties” and first factor loadings obtained from the matrix of tetrachoric correlation coefficients. Problems of testing the fit of the model, and of obtaining invariant parameters are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02291262
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  • 18
    Electronic Resource
    Electronic Resource
    Estimating item parameters and latent ability when responses are scored in two or more nominal categories (1972)
    Springer
    Psychometrika 37 (1972), S. 29-51 
    Details
    ISSN: 1860-0980
    Source: Springer Online Journal Archives 1860-2000
    Topics: Psychology
    Notes: Abstract A multivariate logistic latent trait model for items scored in two or more nominal categories is proposed. Statistical methods based on the model provide 1) estimation of two item parameters for each response alternative of each multiple choice item and 2) recovery of information from “wrong” responses when estimating latent ability. An application to a large sample of data for twenty vocabulary items shows excellent fit of the model according to a chi-square criterion. Item and test information curves are compared for estimation of ability assuming multiple category and dichotomous scoring of these items. Multiple scoring proves substantially more precise for subjects of less than median ability, and about equally precise for subjects above the median.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02291411
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  • 19
    Electronic Resource
    Electronic Resource
    Word and image: Sources of the verbal and spatial factors in mental test scores (1973)
    Springer
    Psychometrika 38 (1973), S. 437-457 
    Details
    ISSN: 1860-0980
    Source: Springer Online Journal Archives 1860-2000
    Topics: Psychology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02291488
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  • 20
    Electronic Resource
    Electronic Resource
    Elastic and inelastic scattering of16O by12C at forward and backward angles (1973)
    Springer
    The European physical journal 262 (1973), S. 377-392 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Angular distributions of the reactions12C(16O,16O)12C and12C(16O,12C)16O have been measured in the angular range of θ CM =10 °–60 ° at 65 and 80 MeV to ground states and excited states of both final nuclei. An optical model withl-dependent imaginary potential gives no consistent description of the elastic scattering data. It is shown, however, that the forward angle elastic scattering may be described by strongly absorbing potentials and that the backward rise of the cross sections in both the elastic and inelastic transitions can be explained by a four nucleon transfer12C(16O,12C)16O.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01394539
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