Showing papers by "University of Perugia published in 1970"
TL;DR: A sensitive and specific fluorimetric method which allows measurement of plasma noradrenalin and adrenalin concentrations even at physiological levels is described, and sufficiently accurate differential estimation of mixtures of the two amines in 1:25 proportion is allowed.
158 citations
TL;DR: Two groups of left and of right brain-damaged patients were given a test of copying designs and of copying crosses and patients with right hemisphere damage showed a tendency to neglect the left half of the models, to orientate the drawings diagonally on the paper, and to make gross errors in spatial relations.
127 citations
TL;DR: An improved procedure according to the trihydroxyindole reaction allows a real increase in the relative fluorescence of epinephrine and norepinephrine to be obtained with respect to previous methods as well as a remarkable stability of both fluorophors and reagent blank value.
47 citations
Journal Article•
28 citations
TL;DR: In this paper, it was shown that trivalent cations are taken up by amorphous but not by crystalline zirconium phosphate, and that the trivalents are not taken up selectively by Zr(HPO 4 ) 2 ·6H 2 O and ZrHNa(PO 4 ) · 5H2 O.
22 citations
TL;DR: In this article, a normal coordinate treatment has been carried out on C 6 H 6 -Cr(CO) 3, in a point-ring approximation, using a diagonal symmetry force field.
21 citations
TL;DR: In this paper, the formation (Kn) and dismutation (Kd) constants have been determined for Co(II) and Br− systems in acetonitrile (L) at different temperatures and constant ionic strength.
21 citations
TL;DR: Partial rate factors for ortho and para positions of thioanisole in bromination and acetylation were determined in this paper, and the substituent effect for p-SCH3 group was tested by extended selectivity treatment and the deviations from linear relationship were explained in terms of Yukawa-Tsuno equation.
15 citations
TL;DR: In this article, the hydrogen-bonding interactions between NH groups of substituted thioureas (L) and halogens (X) in tetrahedral CoL2X2 complexes have been studied by i.r. spectra, in solution in different solvents and in the solid state.
13 citations
TL;DR: In this article, the same authors examined the kinetics of monosubstitution reactions with Fe(CO)2(NO)C3H5 with the following ligands: P(n-C4H9)3, P(OCH3)3 and P(OC2H5)3.
12 citations
TL;DR: In this article, les molecules libres de diacetyl-1,1′ and dibenzoyl-1.1′ ferrocenes peuvent exister sous deux conformations isomeres de rotation, de type meso (I) ou racemique (II).
TL;DR: In this article, an estimate of the successive formation constants of the copper-halide complexes in acetonitrile is presented, and the possible kinetic character of the polarographic electrode processes is discussed.
TL;DR: In this article, the shapes and integrated absorptions of the v (C-O) and v (N)-O stretching bands have been examined in a series of Cobalt complexes of the type Co(CO) 2 NOL (where L = Pφ 3, Asφ3, P(OCH 3 ) 3, P(n-C 4 H 9 ) 3 Sb φ 3 CO, P (Oφ) 3 ; φ = C 6 H 5 ) in cyctohexane solution.
TL;DR: In this paper, the kinetics of monosubstitution reactions of Co(CO)3NO with As(C6H5)3 and P(C 6H5 )3 in cyclohexane, toluene, nitromethane, tetrahydrofuran, acetonitrile and dimethylsulfoxide fit the two-term equation v = (k1 + k′·[L])·[S], where L and S refer to the ligand and the substrate.
TL;DR: In this paper, the equilibrium constants for the reaction [CoX3P]− + X−⇄ [Co4]2− + P in CH2Cl2 were reported.
TL;DR: A strain of paravaccinia virus was isolated from nasal flushings and pharyngeal swabbings collected from one calf involved in an outbreak of a respiratory disease syndrome which occurred in a group of 20 stabled cattle, indicating that it was not responsible for the respiratory signs observed in the disease outbreak from which it was isolated.
Abstract: A strain of paravaccinia virus (66/1456Sc) was isolated from nasal flushings and pharyngeal swabbings collected from one calf involved in an outbreak of a respiratory disease syndrome which occurred in a group of 20 stabled cattle. The isolate appeared to be a lipovirus of the DNA type, pH 3 labile, heat sensitive, and not affected by either 2-(alpha-hydroxybenzyl)-benzimidazole in a concentration of 50 μg per ml or by a 0.125% solution of trypsin. The isolate multiplies in bovine embryo kidney (BEK) cell cultures, producing CPE characterized by the formation of “closed plaques” and intracytoplasmic inclusions. It possesses morphologic characteristics peculiar to those of the paravaccinia viruses, and dimensions of approximately 280 by 160 mμ. The virus is devoid of hemagglutination or hemadsorption activity, and failed to infect sheep, rabbits, or mice, or to produce lesions on the CAM of fertile hens' eggs. Cattle inoculated intranasally, intravenously, or intramuscularly with the isolate, or by the intradermal route in the neck or muzzle, remained clinically healthy. However, when inoculated into the submucosa of calves, or intradermally into the teats of milking cows, the virus produced small ulcerative lesions in the former and erythematous nodules in the latter animals. Neutralizing antibodies were not produced by any of the animals injected with the agent, except by rabbits in one of three attempts. The virus under study was partially neutralized by antiserum to a strain of pseudo-cowpox virus, but no serologic crossing occurred between the isolate and antiserums to any of the following viruses: parainfluenza-3, vaccinia, bovine viral diarrhea, infectious bovine rhinotracheitis, pseudorabies, Shope fibroma, or sheep pox. The isolate reactivated heat-inactivated Lancy-Vaxina strain of vaccinia virus in CAM and BEK cell cultures. Studies of the isolate in cattle indicate that it was not responsible for the respiratory signs observed in the disease outbreak from which it was isolated.
TL;DR: In this paper, the luminescence behavior of compounds containing two chromophoric centers of CR(III) has been analyzed and it has been found that luminecence always originates on the chromophore having lower energy metastable states.
TL;DR: In this paper, equilibrium and rate data have been estimated for the reverse ligand substitution reaction Co(CO)2(NO)L + CO + CO ⇄ CO)3(NO + L with L=Sb(C6H5)3, As(C 6H5), P(C5)4, and P(CO5)5) in toluene solution.
TL;DR: The disubstitution reaction Co(NO)(CO) 2 L+L = Co(CO)(NO)L 2 +CO has been investigated for a series of phosphine and phosphite ligands, in toluene solution up to about 65°C.
TL;DR: In this paper, a normal coordinate treatment, assuming a C 3v molecular symmetry model, was carried out using a diagonal symmetry force field with an F (Fe-C, Fe-C-O(oop)) interaction term.
TL;DR: The Borgo San Donino meteorite is an LL-group chondrite with a fundamentally hypochondritic texture and evident features of recrystallization and metamorphism as discussed by the authors.
Abstract: The principal data are collected about the fall, April 19, 1808, and the distribution of the fragments of the Borgo San Donino, Italy, meteorite (long 44° 52′ N; lat 11° 03′ E) An Almost complete individual, weighing 447 g is described in some detail Crust morphology, mineralogical composition, chemical composition and petrology were studied Optical data were established by microscopic analysis of both thin and polished sections The Borgo San Donino is an ordinary LL-group chondrite, with a fundamentally hypochondritic texture and evident features of recrystallization and metamorphism The presence of some anomalous chondrules is discussed
TL;DR: In this article, the mass spectra and the ionization potentials of several paramagnetic and diamagnetic transition metal complexes of the type M(NO)2HaIPR3 [M = Co, Fe, Hal = Br, I; PR3 = P(nC4H9)3, P(iOC3H7)7), P(C6H5)3] have been measured.
TL;DR: It is concluded that C57B1 mice harbour an occult or latent leukaemogenic virus, and that whole body irradiation causes activation and/or release of this virus.
Abstract: ALTHOUGH C57B1 mice rarely develop spontaneous lymphosarcomas or lymphatic leukaemias1, they are highly responsive to the leukaemogenic action of X-rays2. Leukaemia induced in C57B1 mice by radiation can be transmitted by cell free extracts3. The agent responsible for such transmission is a virus (radiation leukaemia virus), which, rather than radiation itself, seems to be the inducing agent of leukaemia in irradiated C57B1 mice4. Important corollaries of this conclusion are that C57B1 mice harbour an occult or latent leukaemogenic virus, and that whole body irradiation causes activation and/or release of this virus.
TL;DR: On considere l'application d'un modele a ≪cavite ouverte≫ au probleme non-lineaire de l'ecoulement plan d'' un fluide en presence d''un obstacle plat avec cavitation totale and partielle as mentioned in this paper, on en donne la solution analytique and les resultats numeriques par l''application de la theorie des transformations conformes and des techniques de Riemann-Hilbert.
Abstract: On considere l'application d'un modele a ≪cavite ouverte≫ au probleme non-lineaire de l'ecoulement plan d'un fluide en presence d'un obstacle plat avec cavitation totale et partielle. On en donne la solution analytique et les resultats numeriques par l'application de la theorie des transformations conformes et des techniques de Riemann-Hilbert. En contradiction avec les theories lineaires, on ne trouve aucune solution de continuite dans la transition entre les deux regimes de cavitation totale et partielle.
01 Jan 1970
TL;DR: The letteratura moderna ha generalmente interpreted la festivita delle Quinquatrus as a celebrazione propria di Marte, in base alla saliare certificata by alcuni feriali antichi per il 19 marzo as discussed by the authors.
Abstract: La letteratura moderna ha generalmente interpretato la festivita delle Quinquatrus come una celebrazione propria di Marte, in base all’attivita saliare certificata da alcuni feriali antichi per il 19 marzo. In realta, da numerosi ed evidenti indizi, le Quinquatrus devono considerarsi come una festa di exclusiva pertinenza di Minerva, oltretutto gia a partire dall’epoca arcaica: in primo luogo, il dies natalis della dea e ricordato da varie fonti per questa data; ma rivestono una importanza decisiva, ai fini dell’individuazione della titolarita della festa, soprattutto l’analisi etimologico-lessicale del sostantivo Quinquatrus e le relazioni mitologico-calendariali sottese a questa festivita. La concomitante presenza dei rituali dei Salii durante le celebrazioni dedicate a Minerva, pertanto, altro non e che una chiara testimonianza della stretta connessione tra il culto di Marte e quello della dea, nel primo mese dell’anno arcaico.
01 Jan 1970
TL;DR: The relazione che intercorre tra Minerva and i pueri romani, nota archeologicamente dai piu antichi santuari italici della dea ed inoltre documentata dalla presenza dell’altare della Iuventas nella cella di Minerva del tempio capitolino, appare altresi evidente ad una piu approfondita disamina di alcune fonti letterarie di epoca classica; in particolare, risultano
Abstract: La relazione che intercorre tra Minerva ed i pueri romani, nota archeologicamente dai piu antichi santuari italici della dea ed inoltre documentata dalla presenza dell’altare della dea Iuventas nella cella di Minerva del tempio capitolino, appare altresi evidente ad una piu approfondita disamina di alcune fonti letterarie di epoca classica; in particolare, risultano assolutamente determinanti le testimonianze relative alla prassi del tributo del minerval, alla tutela della dea sulla memoria e, infine, le numerose attestazioni del patronato di Minerva sulle attivita dell’artigianato tessile. Quantunque pertinenti ad ambiti totalmente diversi, tali competenze di Minerva sono collegate da un unico filo conduttore, riconducibili ad una origine comune costituita dal primigenio culto tributatole come dea tutelare dei riti di passaggio post-puberali.
01 Jan 1970
TL;DR: This article explored some common features as well as some lines of evolution of the treatise form and established a conjecture as to the establishment of the title well before the fourth century B. C.
Abstract: Before Plato some fifteen Πeρὶ φύσeως were written. They formed the very archetype of what we know as the treatise form: a kind of book especially suitable to record and convey learning. Though giving rise to a literary genre of its own, little attention has been paid so far to what the various Πeρὶ φύσeως could have in common. This paper is devoted to explore some common features as well as some lines of evolution of the genre. It includes a conjecture as to the establishment of the title well before the fourth century B. C.