Showing papers by "University of Ioannina published in 1982"
TL;DR: Attempts to characterize the interferon in the sera of patients with systemic lupus erythematosus and vasculitis revealed that antibody to alpha (leukocyte) interferons, but not to beta (fibroblast)interferon, partially or completely neutralized the antiviral activity.
Abstract: Recently, we found interferon in the sera of patients with systemic lupus erythematosus, rheumatoid arthritis, scleroderma, and Sjogren's syndrome. In this study, we surveyed a variety of other immunologically mediated diseases. We did not find interferon in the sera of patients with Wegener's granulomatosis, sarcoidosis, infectious mononucleosis, minimal change nephritis, kidney transplants, myasthenia gravis, or uveitis, but we did find this protein in the sera of patients with active systemic and cutaneous vasculitis. Attempts to characterize the interferon in the sera of patients with systemic lupus erythematosus and vasculitis revealed that antibody to alpha (leukocyte) interferon, but not to beta (fibroblast) interferon, partially or completely neutralized the antiviral activity. The failure of antibody to alpha interferon to completely neutralize the antiviral activity in certain specimens and the lability of the antiviral activity in some specimens to pH 2.0 treatment both suggest that more than one type of interferon was present.
164 citations
TL;DR: An analysis of steady two-dimensional flow, of an electrically conducting fluid through a porous medium, occupying a semi-infinite region of the space bounded by an infinite, vertical and porous limiting surface under the action of a transverse magnetic field is considered in this article.
Abstract: An analysis of steady two-dimensional flow, of an electrically conducting fluid through a porous medium, occupying a semi-infinite region of the space bounded by an infinite, vertical and porous limiting surface under the action of a transverse magnetic field is considered. Approximate solutions have been derived for the velocity and temperature fields and the rate of heat transfer (Nusselt number). The variations of the velocity and Nusselt number are shown on graphs.
84 citations
TL;DR: In this article, the effects of G (Grashof number) and the K (permeability parameter) on the velocity field of a hydromagnetic free convective flow of a conducting fluid through a porous medium bounded by two parallel plates are considered.
80 citations
69 citations
TL;DR: In this paper, the adsorption of Cs and their coadsorption on clean Cu(100) surfaces has been studied with LEED, AES, and work function measurements in UHV.
Abstract: The adsorption of Cs, ${\mathrm{O}}_{2}$, and their coadsorption on Cu(100) surfaces has been studied with LEED, AES, and work-function measurements in UHV. The work function during Cs deposition on clean Cu(100) shows a minimum, ${\ensuremath{\varphi}}_{min}=1.65$ eV at ${\ensuremath{\theta}}_{\mathrm{Cs}}=0.135$ and a subsequent ${\ensuremath{\varphi}}_{max}=2.07$ eV at ${\ensuremath{\theta}}_{\mathrm{Cs}}=0.27$, which corresponds to a hexagonal close-packed structure of Cs. Preadsorption of oxygen on Cu(100) causes both ${\ensuremath{\varphi}}_{min}$ and ${\ensuremath{\varphi}}_{max}$ to decrease and shift to longer time of Cs deposition. The presence of oxygen on Cu(100) causes disordering of the Cs layer and increases substantially the amount of Cs that can be deposited on the surface. Adsorption of oxygen on Cu(100) is indicated to be an activated process which prevents the growth of oxide at low temperature and pressure. The presence of Cs increases drastically the sticking coefficient and the maximum amount of subsequently adsorbed oxygen. The adsorption of ${\mathrm{O}}_{2}$ on cesiated Cu(100) is controlled by the Cs overlayer and is almost independent of the substrate. Independent of the sequence of Cs and ${\mathrm{O}}_{2}$ deposition, ${\mathrm{O}}_{2}$ is bound directly to the Cu substrate.
58 citations
TL;DR: In this article, the absolute extinction coefficient and oscillator strength values of nine gaseous benzenes (toluene, o-, m-, p-xylene, 1,2,4-, 1,3,5-trimethylbenzene, 2, 3,5,6-tetramethylbenzinene, pentamethylbenzenene, and hexamethyl benzene) were recorded with moderate resolution in the region of the lower valence-shell electronic transitions (4 to 7 eV).
52 citations
TL;DR: In this article, the free vibration problem of a thin composite cross-ply laminated non-circular cylindrical shell subjected to an axial compression was studied, in the framework of the Donnell-type theory, in terms of the shell middle surface displacement components.
49 citations
TL;DR: The usefulness of the findings in the identification of the primary tumour in cases of lymph node metastases of unknown origin, is discussed and it seems that these differences partly reflect the distribution of lysozyme, a1-Antichymotryps in the normal gastric mucosa.
Abstract: Lysozyme, a1-Antichymotrypsin and a1-Antitrypsin were demonstrated by an immunoperoxidase technique (PAP) in malignant cells of adenocarcinomas of the stomach but not of the large intestine. Lymph-node metastases showed identical immunoreactivity to that of the primary tumour. Neoplasms arising from the cardia, the body and the pyloric antrum of the stomach showed different immunostaining reactions: It seems that these differences partly reflect the distribution of lysozyme, a1-Antichymotrypsin and a1-Antitrypsin in the normal gastric mucosa. The usefulness of our findings in the identification of the primary tumour in cases of lymph node metastases of unknown origin, is also discussed.
47 citations
TL;DR: In this paper, the 1 H and 13 C NMR spectra of cis -Pt(S-EtCys)Cl 2 were analyzed and interpreted in favor of a structure which the ethyl-cysteine ligand coordinates through its S and N atoms.
33 citations
TL;DR: In this article, the authors extended the theory of the Accelerated Overrelaxation (AOR) method and presented what is called Symmetric AOR (SAOR), which is done in a way analogous to the one where the SSOR method is obtained from the SOR one.
25 citations
TL;DR: In this article, the masses of the light and heavy Majorana neutrinos of m v ≲3 eV and m σ ⩾10 4 GeV have been obtained.
TL;DR: In this paper, three inequalities of Tchbycheff type are presented, and two of them give lower bounds for the probability of intervals not necessarily symmetric around the mean.
Abstract: Three inequalities of Tchbycheff type are presented. Two of them give lower bounds for the probability of intervals not necessarily symmetric around the mean. The third one generalizes the extension of Tchebycheff's inequalities given by Miyamoto (1978). They are based on the inequality of Markov. Attainability of lower bounds is also discussed.
TL;DR: In this paper, a two-dimensional hydromagnetic free convective flow through a porous medium bounded by a vertical infinite plate is considered and the influence of various parameters entering into the problem on the velocity field is discussed.
TL;DR: In this paper, the authors define measures of information contained in an experiment which are by-products of the parametric measures of Fisher, Vajda, Mathai and Boekee and the non-parametric measure of Bhattacharyya, Renyi, Matusita, Kagan and Csiszar.
TL;DR: In this article, a one-parametric stationary method, known as extrapolation, for improving the convergence rates of a first order iterative scheme, for the numerical solution of the linear system Ax = b, is studied.
Abstract: In this paper a one-parametric stationary method, known as extrapolation, for improving the convergence rates of a first order iterative scheme, for the numerical solution of the linear system Ax = b, is studied. First an analytical determination of good-optimum values of the extrapolation parameter, under some simple assumptions, is made. Then a geometrical interpretation of the method and the optimum results are presented. Finally some applications and numerical examples are given which support the theory developed from both the analytical and geometrical point of view.
TL;DR: In this paper, the exotic lepton violating ( μ −, e + ) reaction has been studied in a gauge theory model, which assumes the existence of a Majorana neutral lepton.
TL;DR: In this paper, an analysis of the two-dimensional flow of an incompressible, viscous binary fluid past an infinite, porous, vertical plate is presented under the following conditions: (i) the suction velocity is constant; (ii) the free stream oscillates in time about a constant mean; (iii) the plate moves in the upward direction in its own plane; and (iv) the temperature of the plate is constant, there are heat generation (absorption) in the fluid.
Abstract: An analysis of the two-dimensional flow of an incompressible, viscous binary fluid past an infinite, porous, vertical plate is presented under the following conditions: (i) the suction velocity is constant; (ii) the free stream oscillates in time about a constant mean; (iii) the plate moves in the upward direction in its own plane; (iv) the temperature of the plate is constant; (v) there are heat generation (absorption) in the fluid.
TL;DR: In this paper, an exact analysis of mass transfer and free-convection currents on the flow past a vertical infinite porous plate in a rotating fluid is presented, where the examined fluid is assumed to rotate in a steady state with a constant angular velocity.
Abstract: An exact analysis of mass transfer and free-convection currents on the flow past a vertical infinite porous plate in a rotating fluid is presented. The examined fluid is assumed to rotate in a steady state with a constant angular velocity. An exact solution for the velocity field is derived and the effects ofE (Ekman number) andGm (Modified Grashof number) on the velocity field are discussed.
TL;DR: In this article, the deprotonated complexes of oxamic acid with Au(III) and Rh(III), where L 2− acts as a bidentate, non-bridging ligand, were investigated.
Abstract: The preparation and some properties of the deprotonated complexes of oxamic acid with Au(III) and Rh(III) are reported. On the basis of analytical results, conductometric measurements, magnetic moments and spectral data (IR and UV-visible), a square planar structure is proposed for K[AuL(OH)2] and octahedral for K3[RhL
3] 3H2O (whereLH2=oxamic acid).L
2− acts as a bidentate, non-bridging ligand.
TL;DR: In this paper, a study of the flow of an electrically conducting fluid past a steadily moving vertical infinite plate is presented, where it is assumed that there is a constant heat flux and constant suction at the plate.
TL;DR: In this paper, an effective two-nucleon potential for high-energy heavy-ion collisions is presented which resolves the undesirable features reported for the potentials (no simultaneous reproduction of the first two moments of the differential nucleon nucleon scattering cross-sections at high energies and no saturation properties for normal nuclear densities) used in the classical equation of motion approach.
Abstract: An effective two-nucleon potential for high-energy heavy-ion collisions is presented which resolves the undesirable features reported for the potentials (no simultaneous reproduction of the first two moments of the differential nucleon-nucleon scattering cross-sections at high energies and no saturation properties for normal nuclear densities) used in the classical equation of motion approach for the study of such collisions.
TL;DR: In this article, a necessary and sufficient condition for nonoscillatory solutions of a class of n -th order (n n-th order r -derivative of the unknown function x defined by where r i (i = 0, 1, n) are positive continous functions on [t 0, ∞] is given.
Abstract: This paper deals with some asymptotic properties of nonoscillatory solutions of a class of n -th order ( n n -th order r -derivative of the unknown function x defined by where r i (i = 0,1…n) are positive continous functions on [t 0 , ∞). The fundamental purpose of this paper is to find for any integer m , 0 m n – 1, a necessary and sufficient condition (depending on m) in order that three exists at least one (nonoscillatory) solution x so that the exists in R – {0} The results obtained extend some recent ones due to Philos (1978a) and they prove, in a general setting, the validity of a conjecture made by Kusano and Onose (1975).
TL;DR: The catalytic activity of rare earth oxides for simple catalytic reactions show patterns which broadly resemble each other and also reactions in which the number of 4f-electrons changes as discussed by the authors.
Abstract: The catalytic activity of rare earth oxides for simple catalytic reactions show patterns which broadly resemble each other and also reactions in which the number of 4f-electrons changes. If simple concepts of electron transfer are augmented, it emerges that any rate controlling step which involves the adsorption of a species by electron transfer to it, leads to an activity pattern with maxima for f0 and f7 and f14 structures.
TL;DR: It is suggested that TRH injected into the mother in a single dose of 200 μg stimulates maternal but not fetal pituitary in late pregnancy during labour, possibly due to inability of TRH to cross the human placenta.
Abstract: SUMMARY
The effect of TRH injection on PRL levels in maternal serum and in serum of umbilical vein (UV) and artery (UA) was investigated in forty-six women. Twenty-two of them, with normal singleton term pregnancy, were given i.v. either saline solution (nine women, control group 1) or 200 μg of synthetic TRH (thirteen women, group 2) 30–45 min before normal delivery. Group 1 PRL values (mean ± SE) (ng/ml) in UV (428 ± 41) and UA serum (434 ± 45) were significantly higher than in maternal serum either before (285 ± 39) or after saline injection (331 ± 14) (P 0·1). Group 2 maternal serum PRL values after TRH were significantly higher than in UV and UA serum (P < 0·05). A significant positive correlation was found between UV and UA serum PRL values in both group 1 (r=0·858, P < 0·01) and group 2 (r=0·870, P < 0·001). Twelve of the remaining twentyfour women were given TRH either 10–20 min (four women), 60–75 min (four women), or 90–110 min (four women) before delivery. UA serum PRL values did not differ significantly from corresponding controls (twelve women). It is suggested, from these findings in women, that TRH injected into the mother in a single dose of 200 μg stimulates maternal but not fetal pituitary in late pregnancy during labour. This is possibly due to inability of TRH to cross the human placenta.
TL;DR: A Bianchi type-V exact solution of the Einstein-Cartan theory representing several classes of perfect-fluid homogeneous cosmological models is studied in this article, with the introduction of an effective energy-momentum tensor, whereby it is shown that the two theories, although formally equivalent, provide physically inequivalent interpretations of the solution.
Abstract: A Bianchi type-V exact solution of the Einstein-Cartan theory representing several classes of perfect-fluid homogeneous cosmological models is studied. With the introduction of an effective energy-momentum tensor, a dual description of the solution is given within the framework of general relativity, whereby it is shown that the two theories, although formally equivalent, provide physically inequivalent interpretations of the solution. Examined in some detail are the singularity behavior as well as other features of the models.
TL;DR: The CD spectrum of the complexes of the quinine molecule in DMF or DMSO solution reveals the presence of a chelate ring in the d-d absorption range.
Abstract: The CD spectrum of the complexesQ·2CuCl2,Q·2CoCl2,Q·2NiCl2·8H2O,Q·3CrCl3·6H2O,Q·PdCl2·3H2O andQ·2PdCl2·5H2O (whereQ=quinine) inDMF orDMSO solution revealsCotton effects in the d-d absorption range. TheCotton effects are relatively strong in the case of Cu(II) and Pd(II) complexes which implies that only in these complexes the hydroxyl group of the quinine molecule possibly participates in the coordination with these metal ions by formation of a chelate ring. The IR spectra of the complexes of Pd(II) are discussed in this respect.
TL;DR: In this paper, an analysis of a steady two-dimensional flow of water at 4°C through a saturated porous medium bounded by a vertical, infinite and permeable plate is presented on the basis of generalized Darcy's law.
TL;DR: In this article, the half-width of the density of states band was estimated at the Fermi level for the Kα 1 and Kα 2 X-ray Raman bands.
Abstract: Spectroscopic analysis of scattered X-rays from polycrystalline Be irradiated by Cu Kα 1 , Kα 2 radiations, shows two separated bands with an energy shift of 120±1 eV from the position of the corresponding coherently scattered radiations. These two bands are characterized as X-ray Raman scattering bands. Their position in the spectrum, is independent of the scattering angle. Measuring the F.W.H.M. of the experimentally found Kα 1 X-ray Raman band and the used as primary, we made a quantitative estimation of the Half Width of the density of states band just above the Fermi level. The intensity ratios of the Raman bands at six different scattering angles, are in very good agreement with the corresponding ratios of the intensity factors, suggested by Mizuno and Ohmura. Furthermore two bands found at the long wavelength limit cannot be attributed to the antibonding effect of Be atoms, before we extend our measurements.