Showing papers by "Sofia University published in 1972"
TL;DR: By introducing a hydrocortisone-antibiotic mixture into the posterior urethra of 26 patients with chronic prostatitis the author obtained satisfactory improvement in 73.1% and very good results were observed in 22 out of 42 patients with premature ejaculation.
Abstract: By introducing a hydrocortisone-antibiotic mixture into the posterior urethra of 26 patients with chronic prostatitis the author obtained satisfactory improvement in 73.1%. Fifteen of these patients have been followed up from 1 month to 6 years and in 86.7% of them the improvement was lasting. Very good results were observed also in 22 out of 42 patients with premature ejaculation, mainly in cases where premature ejaculation was due to chronic inflammation in the posterior erectogenic area.
50 citations
TL;DR: The activation of the homogeneous catalytic reactions used in analysis is discussed in this paper, where the use of activators in catalytic methods permits increase in their sensitivity by 2-4 orders of magnitude and improvement in their selectivity as well.
48 citations
TL;DR: All 6 patients with pitryrisis lichenoides tested for toxoplasmosis responded very favourably: 3 were completely cured and the 3 toxoplasma‐negative patients failed to improve.
Abstract: Summary.— Eleven patients with pitryrisis lichenoides have been tested for toxoplasmosis. In 6 of them the complement fixation test, the intradermal test with toxoplasmin and the Sabin-Feldman test were repeatedly strongly positive. The same patients reported continuous occupational animal contact. Both the toxoplasma-positive patients and 3 negative patients were submitted to treatment with pyrimethamine. All 6 toxoplasma-positive patients responded very favourably: 3 were completely cured. 75 clearance of lesions was obtained in 2 and 50 in one. The 3 toxoplasma-negative patients failed to improve.
The authors believe that Toxoplasma gondii infection may play an aetiological role in pityriasis lichenoides. More observations are needed in order to corroborate or to reject this supposition.
32 citations
TL;DR: Adsorption of titanium on humic acids, peat and coal macerals has been studied at pH values ranging from 0.8 to 2.0 in this paper.
26 citations
20 citations
11 citations
01 Mar 1972
TL;DR: In this paper, the authors focused on finding diagnostic features of spherulites formed by continuous splitting of the crystals, and found that three different growth mechanisms: crystallization of a spherical gel mass, growth from a single centre to all directions, and splitting the crystals lead to the same result.
Abstract: Three different growth mechanisms: (1) crystallization of a spherical gel mass, (2) growth from a single centre to all directions, and (3) splitting of the crystals lead to the same result—to the formation of a spherulite (a spherical aggregate with a radial structure). The present paper is concerned with finding diagnostic features of spherulites formed by continuous splitting of the crystals.
10 citations
10 citations
TL;DR: In this article, the second harmonic of the infrared light excites a tunable dye laser and the three frequencies of the fundamental, SH and dye laser are summed in calcite, resulting in a frequency tunable signal in the range 216-234 nm with a power of about 15 kW.
9 citations
TL;DR: In this article, a normal coordinate treatment was used to show that the observed frequency differences for the stretching vibrations of the methylene group in cycloalkanes are due to constant changes.
8 citations
TL;DR: In this article, a complete set of commuting operators including the squares of the spin, of the isotopic spin, their third projections, the hypercharge, the baryon number and so on is introduced.
TL;DR: In this paper, a linear relation between logP ΔV and logΔR for classical cepheids is found, which perhaps has a break at ΔR=10R⊙.
Abstract: On the basis of more abundant data a relation logPΔV/logΔR for cepheid variables (Fernie, 1965) is constructed. A linear relation between logP ΔV and logΔR for classical cepheids is found, which perhaps has a break at ΔR=10R
⊙. On the logΔR/logP diagram thes-cepheids (Efremov, 1968) show a distinct sequence. Alls-cepheids present a relative variation of the radii ΔR/R≤≤0.075. The existence of non-s-cepheids with ΔR/R≤0.075 raises a point about the evolutionary place of these stars (see Efremov, 1968). One could suppose that cepheids with logP>1.1 pulsate in the first overtone.
TL;DR: In this paper, a Si(Au) surface barrier detector has been used to detect RaA and RaC with the filter at the end of the accumulation process, and their decay curves have been plotted and the values of their activity on the filter were found by extrapolation.
TL;DR: In this paper, a sensitive method for contactless measurements of the electric field strength in CdS (which is applicable for other wide-gap semiconductors, too) was used to investigate the main parameters of ac high-field domains in monocrystalline cdS platelets.
Abstract: A sensitive method for contactless measurements of the electric field strength in CdS (which is applicable for other wide-gap semiconductors, too) was used to investigate the main parameters of ac high field domains in monocrystalline CdS platelets. The field distribution in the ac domains and the domain velocity were measured in dependence on the intensity of green and infrared (ir) light and on the applied voltage. The occurrence of ac domains under inhomogeneous ir irradiation and double-injection conditions was observed. The experimental results indicate that holes play an important role in the behaviour of the ac domains.
Eine empfindliche Methode zur kontaktlosen Messung der Feldstarke (die auch fur andere breitbandige Halbleiter anwendbar ist) wurde benutzt, um wesentliche Kenngrosen von ac-Hochfelddomanen in einkristallinen CdS-Plattchen zu untersuchen. Die Feldverteilung in den ac-Domanen und die Domanengeschwindigkeit wurden in Abhangigkeit von der Intensitat von grunem und infrarotem Licht und von der angelegten Spannung untersucht. Das Auftreten von ac-Domanen bei inhomogener Infrarot-Belichtung und bei Doppelinjektion wurde beobachtet. Die experimentallen Ergebnisse weisen darauf hin, das die Locher fur Entstehung und Verhalten von ac-Domanen von entscheidender Bedeutung sind.
TL;DR: In this article, it was shown that the adsorption of gases and vapours on the surface of thin gallium films causes an increase or decrease in the resistance depending on the structure of the film.
TL;DR: In this article, the surface electrical conductivity of a thin semiconductor film with electric dipoles on the surface is calculated and the influence of the image forces on surface conductivity is evaluated, in some cases these forces give rise to two-dimensional surface energy bands at a depth of about 0.01 eV in the energy gap.
Abstract: The surface electrical conductivity of a thin semiconductor film with electric dipoles on the surface is calculated. Surface electron states connected with the semiconductor–dielectric interface are investigated and the influence of the image forces on the surface conductivity is evaluated. In some cases these forces give rise to two-dimensional surface energy bands at a depth of about 0.01 eV in the energy gap, so that they must be taken into consideration.
On a calcule la conductivite electrique de surface d'nne lame mince semiconductrice avec des dipoles electriques a la surface. On a examine les etats d'electron, associes a la surface qui separe le semiconducteur du dielectrique exterieur et on a evalue l'influence des forces de l'image sur la conductivitye de surface. Dans certains cas ces forces sont la cause de l'apparition a la surface de bandes d'energie a deux dimensions dans la bande interdite a une profondeur de 0,01 eV environ et par consequent elles doivent ětre prises en consideration.
TL;DR: In this paper, a semi-empirical one-dimensional model for non-adiabatic thermal convection in moist air is studied, where the fundamental equations to be solved are those of the heat flux moisture balance and the motion of rising air parcels (thermals) with variable mass due to mixing with environmental air.
Abstract: A semi-empirical one-dimensional model for non-adiabatic thermal convection in moist air is studied. The fundamental equations to be solved are those of the heat flux moisture balance and the motion of rising air parcels (thermals) with variable mass due to mixing with environmental air. A simple solution is found and a number of characteristic levels of the convection are determined for the case of a linear decrease of the environmental temperature and specific humidity with height. In contrast to previous studies, the entrainment rate, α(z)=Mi−1(dMi/dz), is taken as an explicit function of z, such that α(z)=3/(α1+z), where a1 is a constant. The predictions of the model are quite realistic and could be used in studying the initial stage of the formation of cumulus clouds.
TL;DR: Gold in iron ores has been determined by means of its catalytic action on the oxidation of mercury(I) by cerium(IV) as mentioned in this paper, and the calibration curve is linear over the range 3-30 ng/ml.
Abstract: Gold in iron ores has been determined by means of its catalytic action on the oxidation of mercury(I) by cerium(IV). The calibration curve is linear over the range 3–30 ng/ml. Only iridium(IV), platinum(IV), palladium(II), ruthenium(III) and gallium(III) interfere seriously, though some interference is experienced from lead(II), iron(III), osmium(VIII) and indium(III).
TL;DR: In this article, the influence of the ions which usually accompany molybdenum was established from the values obtained for the conditional solubility products of their oxinates, and the behavior of Cu(II), Fe(III), W(VI), and Al(III) was studied experimentally.
Abstract: In presence of DCTA molybdenum is selectively precipitated with oxine. The precipitation may be utilized for a volumetric determination with amperometric end-point detection. The influence of the ions which usually accompany molybdenum was established from the values obtained for the conditional solubility products of their oxinates. The behaviour of Cu(II), Fe(III), W(VI) and Al(III) was studied experimentally. It is shown, that Cu, Fe and W are completely masked by DCTA, Al was masked with NH4F.
TL;DR: Aus Meerschweinchen-Knochenmark, das nach der Methode von Yamada 6 isoliert wurde, wird der Einfluss des mesodermalen induzierenden Faktors auf dem äusseren Keimblatt von Triton bei beginnender Gastrulation geprüft.
Abstract: Aus Meerschweinchen-Knochenmark, das nach der Methode vonYamada6 isoliert wurde, wird der Einfluss des mesodermalen induzierenden Faktors auf dem ausseren Keimblatt von Triton bei beginnender Gastrulation gepruft. Das Produkt wirkt nach der Bestrahlung nicht indizierend, sondern destruktiv auf das Explanat.
TL;DR: In this article, self-activated zinc sulphide with the features of high-temperature luminophors was obtained in the presence of copper, with the preparation still at about 36°C, and afterglow was obtained.
01 Aug 1972
TL;DR: In this article, the authors theoretically investigated the regimes of high conversion efficiency of cascade triplers of optical radiation and showed that the maximum efficiency for a beam with Gaussian distribution of the amplitude in space and time is about 50%.
Abstract: The regimes of high conversion efficiency of cascade triplers of optical radiation are theoretically investigated. A conversion efficiency of 100% for plane waves can be reached. Analytical expressions for the wave amplitudes in this case are given. The conversion efficiencies for a laser beam with Gaussian distribution of the amplitude in space and time are numerically computed. The maximum efficiency for such a beam is about 50%. Some experimental situations are discussed.