Showing papers by "University of Graz published in 1972"
TL;DR: In the former systems broad transitions are observed, and whenever the experimental temperature is not above that of the transition range clustering of molecules occurs, Bilayers of the isolated lipids of some biological membranes exhibit such clustering at the environmental temperature of the membrane.
126 citations
TL;DR: As macromolecules are giant compared with the normally used CuK α wavelength λ = 1·54 A, the scattering of the particle as a whole is found at Correspondingly small angles.
Abstract: In all scattering phenomena the scattering angles are inversely related to the dimensions of the scattering particles. As macromolecules are giant compared with the normally used CuKα wavelength λ = 1·54 A, we find the scattering of the particle as a whole at Correspondingly small angles.
85 citations
78 citations
TL;DR: In this paper, the authors show that with minimal Ca, the plants show obvious signs of damage yet still they form crystals of Ca oxalate although to a lesser extent as compared with ''normal« controls.
52 citations
TL;DR: It is concluded that, in the mucosa, plasmalogen formation is specific for ethanolamine-containing alkyl glycerophospholipids.
46 citations
TL;DR: The experiments described in this report were aimed at studying the final step in the reaction sequence during plasmalogen biosynthesis, i.e. the enzymic desaturation at carbons 1 and 2 of theAlkyl moiety of alkyl (acyl) glycerophosphoryl ethanolamine (alkyl acyl GPE).
42 citations
TL;DR: The Conductivity of Bark-Extracts from Spruce, a Sensitive Indicator for Air Poilution, may be determined more precisely by electrolytic conductivity than by pH-value or sulphate level of foliage.
Abstract: The Conductivity of Bark-Extracts from Spruce, a Sensitive Indicator for Air Poilution. Bark of spruce is a useful and sensitive indicator for air pollution. The latter may be determined more precisely by electrolytic conductivity of bark extracts than by pH-value or sulphate level of foliage. By an additional simple sulphate analysis of bark extracts the effects of SO2 may be distinguished from those of certain components in dust.
37 citations
TL;DR: Acylheterocumulene (2 bzw12,19) postuliert in this paper, i.e., α-Acylhecto-mulene.
Abstract: 4-Benzoyl-5-phenyl-2,3-dihydro-furan-2,3-dion (1) setzt sich mit Arylisocyanaten unter CO-Abspaltung zu den Oxazin-2,4-dionen3 bzw4 um1 und p-Tolylcarbodiimid reagieren hingegen zum 4-Hydroxy-chinolin9 weiter Die 4-Hydroxy-chinoline9 bzw17 erhalt man unabhangig davon durch thermische Belastung der Pyrrol-2,3-dion-Derivate14 bzw15, die aus den entsprechenden Dibenzoylmethananilen und Oxalylchlorid synthetisierbar sind Als Zwischenstufen dieser Cyclisierungsreaktionen werden α-Acylheterocumulene (2 bzw12,19) postuliert
31 citations
30 citations
28 citations
TL;DR: From immunochemical and electrophoretic studies of the intact and totally delipidized lipoprotein B it was concluded that this lipop protein represents a separate family within the high-density range of human serum lipoproteins.
Abstract: 1. Lipoprotein B from female Lp(a)-lipoprotein-negative serum was isolated from the fraction of density 1.073-1.125 by using immunoadsorbent; 2.5mg of freeze-dried material was obtained from 100ml of serum from a fasting patient. 2. The hydrated density of this lipoprotein was found to be 1.084g/cm(3). A flotation rate F(1.200) of 9.4 and lipid/protein ratio 1.40 were found, similar to that of high-density (d 1.073-1.125) lipoprotein preparations. 3. From immunochemical and electrophoretic studies of the intact and totally delipidized lipoprotein B it was concluded that this lipoprotein represents a separate family within the high-density range of human serum lipoproteins. 4. The possibility that the isolated lipoprotein B is an artifact created by the isolation procedure is discussed.
TL;DR: A sounding rocket was launched recently from the Andoya range (69° 17′ N) to study the ion composition around the cold summer mesopause, and its relation to ambient temperature, ionization production and ionization loss rates as mentioned in this paper.
Abstract: A SOUNDING rocket was launched recently from the Andoya range (69° 17′ N), chiefly to study the ion composition around the cold summer mesopause, and its relation to ambient temperature, ionization production and ionization loss rates. The most striking result was the large size of the water cluster ions detected and the extremely rapid change in the ion composition around 85 km. The rocket, a Nike Cajun launched on August 8, 1971, at 1211 GMT, reached an altitude of 98.6 km and carried the following experiments.
TL;DR: This paper is a first report of the X-ray small angle scattering experiments on LpA, and the results given are confined to the most unambiguous molecular parameters as the radius of gyration, the molecular weight and the particle volume.
TL;DR: In this article, it was shown that the Rayleigh cube law of energy dissipation in ferromagnetic hysteresis and Dorey's damping rule for stress-strain hystresis are simple consequences of the statistical properties of these phase-space singularities.
TL;DR: The frequency of satellite association in metaphases is determined from lymphocyte cultures 'of heal thy adul t males and females, of children with normal chromosomes, of pat ients with chromosome aberrat ions, and of parents of mongoloid children.
Abstract: I t has been observed repeatedly tha t during metaphase certain chromosomes tend to occupy positions which are in relat ion to one another. The aeroeentrie chromosomes approach each other with their satellites more often t han i t would be expected. This relative posit ion to one another has been called satellite association and probably is the result of the nueleolar-forming funct ion of these chromosomes [5, 4]. I t is possible tha t a certain stickiness of the nueleolar substance and the actual t ime of the dissolution of the nncleolus during prophase, influence the posit ion of the acrocentric chromosomes in the metaphase plate [2]. Many writers [1, 4, 5, 8] presume tha t there is a relat ionship between the increased frequency of satellite association and the oeenrence of chromosomal n0n-dis junct ion, since satellite association has also been observed during pachytene [3]. I n order to prove this hypothesis, we have determined the frequency of satellite association in metaphases from lymphocyte cultures 'of heal thy adul t males and females, of children with normal chromosomes, of pat ients with chromosome aberrat ions, and of parents of mongoloid children. The association values of hea l thy adults and of mongoloid children has already been given previously [7].
TL;DR: The use of an autoregressive model of a higher order permits a 30% shortening of time for the calculation of a greater number of amplitude values of the EEG, which results in 95% saving of execution time compared with the usual method of calculating the power density distribution without model and FFT.
TL;DR: In this paper, the Synthese einer Reihe von Derivaten des 4-Hydroxy-2-pyridons durch Reaktion von Enaminen, Azomethinen, und Imidoestern mit Malonsaure-bis-2,4,6-trichlorphenylestern, Malonylchloriden, and Kohlensuboxid (C3O2) berichtet.
Abstract: Es wird uber die Synthese einer Reihe von Derivaten des 4-Hydroxy-2-pyridons durch Reaktion von Enaminen, Azomethinen und Imidoestern mit Malonsaure-bis-2,4,6-trichlorphenylestern, Malonylchloriden und Kohlensuboxid (C3O2) berichtet.
TL;DR: In this paper, the mechanism of the action of BaO2 and BaCO3 used as additives to silver catalysts (2-36 wt %) in the oxidation of ethylene to ethylene oxide and CO2 has been studied.
TL;DR: The erhaltenen Anilino-(1,3-dioxo-2-indanyliden)acetonitrile 2a-g sind intensiv gelb-orange bis dunkelrot and besitzen potentielle Farbstoffeigenschaften as discussed by the authors.
Abstract: 2-Dicyanmethylen-1,3-indandion setzt sich mit arom. Aminen sowie mit subst. Hydrazinen unter Austausch von HCN um. Die erhaltenen Anilino-(1,3-dioxo-2-indanyliden)acetonitrile 2a–g sind intensiv gelb-orange bis dunkelrot und besitzen potentielle Farbstoffeigenschaften.
TL;DR: Data obtained in this study do not support the opinion that an abnormal α-lipoprotein (α-(T)-Lp) is present in the serum of Tangier patients, as proposed by other investigators.
TL;DR: In this article, the structure of the wax on the needles of the spruce, Picea abies (L.) Karsten, has been carried out by SEM and it has been established that wax appears on the surface of the plant as soon as the needles are no longer covered by the testa or bud scales.
TL;DR: The formation of the alkyl glycerol ether bond from hexadecanol and dihydroxyacetone phosphate is catalyzed by a microsomal enzyme system; inhibition by p-chloromercuribenzoate suggests the involvement of SH enzymes.
TL;DR: In this article, the mechanism of the action of SrO2, CaO 2, SrCO3, barium formate and barium oxalate used as additives to silver catalysts (2 −20 mole %) in the oxidation of ethylene to ethylene oxide and CO2 + H2O has been studied.
TL;DR: In this paper, the Darstellung von 2-Dicyanmethylen-indandion-1,3-monophenylhydrazonen wird beschrieben and die intensive, blaugrun bis violette Farbe der Verbindungen 2a-d diskutiert.
Abstract: Die Darstellung von 2-Dicyanmethylen-indandion-1,3-monophenylhydrazonen wird beschrieben und die intensive, blaugrun bis violette Farbe der Verbindungen 2a–d diskutiert. Durch Vergleich mit dem gelb gefarbten 2-Isopropyliden-indandion-1,3-monophenylhydrazon (3c) wird der spezifische Einfluss der Dicyanmethylengruppe auf den Farbcharakter nachgewiesen. 2 a und b sind thermisch und losungsmittelabhangig instabil und cyclisieren zu substituierten Indenopyridazinen 4a–b, deren chemische Reaktivitat beschrieben wird.
TL;DR: The aim of this work was to isolate and characterize this LpA from the LDL fraction, called LpALD L in this paper, and to demonstrate the heterogeneity of the protein moiety of low density lipoproteins (LDL).
TL;DR: In this article, aus den Enhydrazinen 1-Diphenylamino, 4-methyl-5-phenyl, 2,3-dihydro-pyrrol-2,3dion reagiert mit den entsprechenden nucleophilen Reagentien zu den Verbindungen.
Abstract: Die aus den Enhydrazinen1 bzw.2 mit Oxalylchlorid synthetisierbaren Pyrrol-2,3-dione3 bzw.4 lagern sich bei therm. Belastung nach Art einerFischer-Indolsynthese in die Indolderivate5 bzw.6 um. 1-Diphenylamino-4-methyl-5-phenyl-2,3-dihydro-pyrrol-2,3-dion reagiert mit den entsprechenden nucleophilen Reagentien zu den Verbindungen7–9.
TL;DR: In this article, the interpartikulare Streuung kann nur bei Teilchen mit ebener Begrenzung verschwinden liegen.
Abstract: Um den Einflus der interpartikularen Interferenzen zu untersuchen, wird die Streufunktion in zwei Anteile zerlegt, die die reine Partikelstreuung bzw. die interpartikulare Streuung darstellen. Es wird gezeigt, das letztere sehr empfindlich von der Teilchenform abhangt. Die interpartikulare Streuung kann nur bei Teilchen mit ebener Begrenzung verschwinden. Im allgemeinen mus das Verhalten zwischen zwei Grenzfallen, dem Gas-Typ und dem Liquid-Typ, liegen. Wahrend der sterische Ausschliesungseffekt stets zu letzterem fuhrt, konnen beide Typen zwanglos durch Wahrscheinlichkeitsnachwirkung erreicht werden. Diese Verhaltnisse werden an einem einfachen Modell demonstriert.
TL;DR: Electro microscopic observations of salivary glands, skin and kidney of two patients with Sjögren's Syndrome were performed, and virus like inclusions could be observed in one of the patients, for the first time, in the parotid gland with myoepithelial sialadenitis.
Abstract: Im Hinblick auf die enge Verflechtung des Sjogrens-Syndroms mit den Kollagenkrankheiten wurden bei zwei Pationten mit Sjogrens-Syndrom elektronenmikroskopisehe Untersuchungen von Speicheldrusen, Haut und Niere durchgefuhrt. Bei einem der beiden Patienten konnten erstmalig solche Einschluskorper in der Gl. parotis bei myoepithelialer Sialaldenitis in Capillarendothelien (Abb. 1) und in Lymphocyten nachgewiesen werden. Ferner gelang ihr Nachweis bei demselben Patienten in der Niere, and zwar nicht nur in den glomerularen (Abb.3), sondern auch in den peritubularen (Abb.4) Capillaren. Diese Inklusionen sind in den Zisternen des endoplasmatischen Reticulums lokalisiert und setzen sich aus tubularen Einheiten mit einem Durchmesser von 200–250 A zusammen. Die Tubuli scheinen zu anastomosieren, wodurch sie in ihrer Gesamtheit als dreidimensionales Netzwerk imponieren (Abb. 2), Bezuglich der Natur dieser Einschlusse werden zwei Moglichkeiten, namlich die virale and die nichtvirale diskutiert. Fur die Virusnatur sprechen rein morphologisch die Ahnlichkeit mit den RNS-haltigen Paramyxoviren, sowie die Verdauung durch RNSase, dagegen die bisher negativen Resultate von Serumantikorpern, Immunfluorescenz und Gewebekultur. Der zunehmende Nachweis dieser Einschluskorper auser bei Kollagenkrankheiten auch bei verschiedenen anderen Erkrankungen scheint unserer Ansieht each eher fur eine eigentumliche Reaktion des endoplasmatischen Reticulums auf einen vorlaufig unbekannten Reiz als fur eine Virusinfektion der Zellen zu sprechen.