Showing papers by "University of Zagreb published in 1985"

Pharmacokinetics of triamcinolone acetonide and its phosphate ester.

Abstract: Triamcinolone acetonide in the form of its phosphate ester was given intravenously in two different doses (10 mg/kg and 80 mg) Plasma levels of the ester and triamcinolone acetonide were measured and pharmacokinetic parameters were calculated The pharmacokinetics both of the phosphate and the free alcohol were dose-dependent No unchanged ester was found in the urine, indicating complete conversion of the pro-drug Triamcinolone was not a major metabolite of triamcinolone acetonide in humans Renal clearance was low and independent of the dose Only about 1% of the dose was found in the urine as triamcinolone acetonide

Solubility and enthalpy of precipitation of magnesium, calcium, strontium, and barium dodecyl sulfates

Abstract: The solubilities of Mg, Ca, Sr, and Ba dodecyl sulfates in excess of either of the precipitation components (metal nitrate or sodium dodecyl sulfate) have been analyzed and correlated with the calorimetric data. It was shown that the precipitation boundaries could be quantitatively explained if the interactions of all ionic species were taken into consideration. Specifically, the appropriate activity coefficients and the counterion bondings by the micelles were introduced in the expressions describing the solubility boundaries. The values of the solubility products, and of enthalpies and entropies of precipitation, for the four salts are evaluated and reported.

Romantic Jealousy and Romantic Envy A Seven-Nation Study

Abstract: Factor analyses and Procrustes rotations of the responses of 1194 female and 877 male university students in seven countries to a 69-item Likert-type questionnaire revealed cross-cultural commonalities and differences for romantic jealousy and romantic envy. However, when mean ratings of the questionnaire items were categorized as indicating agreement or disagreement with the items, the evidence for cross-cultural invariance of jealousy and envy was less impressive. The stronger cross-cultural invariance found with factor-analytic data was interpreted as evidence that the issues of concern in jealousy and envy situations are similar across nations. The weaker invariance found with the ratings of the items was taken as evidence that events arousing those issues of concern differ across nations.

Equivalence of the perturbative and Bethe-Ansatz solution of the symmetric Anderson Hamiltonian

Abstract: 2014 We show that the exact Bethe-Ansatz results for the spin and charge susceptibilities and the specific heat for the symmetric Anderson model can be expanded in power series which converge absolutely for any finite value of the expansion parameter U/03C00394 and which coincide with Yosida and Yamada’s perturbative expansions for the same quantities. The coefficients of these expansions are found to satisfy the simple recursion relation Cn = (2 n 2014 1) Cn-1 (03C0/2)2 Cn-2 and to decrease rapidly with increasing order. Hence a small number of terms proves sufficient for an accurate description of the system even in the strong correlation regime (U/03C00394 ~ 2). Finally, we discuss an attempt to construct a perturbative solution for the ground state of the asymmetric Anderson Hamiltonian. J. Physique 46 (1985) 1459-1467 SEPTEMBRE 1985, Classification Physics Abstracts 75.20H

Density of states for intermediate valence and Kondo systems

Abstract: We calculate the density of states for the nondegenerate Anderson model for various values ofu=U/πΔ andnf using the perturbation theory withu as the expansion parameter. Summing all the ω-independent self-energy diagrams, we use the Friedel sum rule and Ward identities to express the physical quantities in terms of the remaining ω-dependent part of the self-energy, which we evaluate to the 2nd order. The results for the spin and charge susceptibilities obtained in such a way compare rather well with the Bethe-ansatz results. The density of states exhibits different features in different parts of the parameter space. In Kondo region (u>1,nf≅1, i.e., −ef~U/2≫Δ), we obtain a many-body resonance (half-width ∼TK) around the Fermi level and two broad peaks (∼Δ) at about ef +nfU and ef +U. In the VF region (u>1, and e|f|≦Δ) we obtain only two peaks (∼Δ), one at about ef and one between ef +nfU and ef +U. The consequences regarding the shape of the photoemission and inverse photoemission spectra of Ce intermetallics are discussed.

Semen LDH-X Deficiency and Male Infertility

Abstract: Sperm-specific isozyme LDH-X (LDH-C4) in the semen of some infertile men with a normal sperm concentration was absent. This finding suggests a need for semen LDH-X isozyme determination in the evaluation of some causes of male infertility.

Lorentz Noninvariance and the Eotvos Experiments

Abstract: We explore the consequences of Lorentz noninvariance (LNI) for the Eoetvoes experiments in several models. It is shown that a violation of Lorentz invariance leads to an anomalous difference in the gravitational acceleration of two test masses which depends on their composition. Using the present experimental limits from the Eoetvoes experiments, we then derive a limit on the magnitude of a possible violation of Lorentz invariance in the model of Nielsen and Picek (NP). In an Appendix we present a detailed discussion of the contribution to the nuclear binding energy due to the weak interactions, which are the presumed source of the LNI effects in the NP model.

Immunological and respiratory changes in tea workers.

Abstract: Immunological status and respiratory function were studied in 26 female nonsmokers employed in processing different types of tea. Skin tests with tea-allergens demonstrated the highest percentage of positive reaction to sage (45%), gruzyan (40%), mentha (35%), and dog rose (10%). Among 17 skin-tested control workers, 23% had positive skin reaction to sage, 19% to gruzyan tea, 20% to mentha and 11% to dog rose and Indian teas. Serum levels of total IgE were increased in 27% of the tea workers and in 7% of the control subjects. Prevalence of almost all chronic respiratory symptoms was higher in tea workers with positive skin tests than in those with negative skin tests to tea allergens. Tea workers with positive skin tests to tea allergens had larger mean acute reduction over the Monday workshift in flow rates (MEF50%: -11.9%; MEF25%: -20.6%) than in those with negative skin tests (MEF50%: -5.7%; MEF25%: -16.7%), thus suggesting an obstructive effect mostly located in smaller airways. Bronchoprovocation testing with different tea allergens provoked acute reductions of ventilatory capacity in four out of six subjects tested. Relative fall over a 90-min post exposure was greater in MEF25% (ranging from 13% to 67%) than in MEF 50% (ranging from 9% to 45% of the control values).

Induction of embryogenic callus in Cucurbita pepo hypocotyl explants by indole-3-ethanol and its sugar conjugates

Abstract: Hypocotyl explants of pumpkin (Cucurbita pepo L.) were inoculated aseptically on solid media containing Murashige and Skoog (MS) macro- and micronutrients, organic supplements, glucose as a carbon source, and indoleacetic acid (IAA) or one of its possible metabolic precursors, i.e. indole-3-ethanol [3-(2-hydroxyethyl)-indole, tryptophol], 2-(indol-3-yl)-ethyl α-L-arabinopyranoside (tryptophol arabinoside), and 2-(indol-3-yl)-ethyl β-D-glucopyranoside (tryptophol glucoside). Embryogenic callus and adventitious roots developed on the explants, the response depending on the source of auxin, its concentration, and endogenous, possibly genetic, factors. Hypocotyl sections did not form embryogenic tissues and did not survive on media which did not contain an auxin or auxin precursors. Fewer explants responded to IAA than to indole-3-ethanol. Its arabinopyranoside was even more effective, while only a few hypocotyl sections proliferated in the presence of the corresponding glucopyranoside. Embryogenic callus induced by any of the four above compounds could be subcultured on media containing the same source of auxin. Selected callus lines have been maintained for more than three years and have continued to form embryoids. Indole-3-ethanol and IAA were suitable for clonal propagation of regenerated plantlets by axillary and apical bud culture.

Interaction of cadmium, zinc and copper in relation to smoking habit, age and histopathological findings in human kidney cortex.

Abstract: In this study the concentrations of cadmium, zinc and copper were determined by atomic absorption spectrophotometry in 51 post mortem kidney cortex samples. A histopathological examination of the kidney was also performed. These parameters, together with age and smoking habit, were statistically related by means of factor analysis. The results show that the first factor associated smoking habit, cadmium and zinc and the second factor histopathological findings and age.

The mycotoxicological chain and contamination of food by ochratoxin A in the nephropathic and non-nephropathic areas in Yugoslavia

Abstract: Research was carried out on the distribution of moulds on cereals in vegetation and in storerooms in the period from 1974 to 1981 and on ochratoxin (OA) in stored maize and wheat as well as residues of OA in the organs of swine in the nephropathic and non-nephropathic areas in the SR of Croatia, Yugoslavia. It was shown that moulds belonging to toxogenic species contaminate cereals in vegetation to an approximately equal degree in both areas (Penicillium 6.6–20.0%, Aspergillus 2.5–6.6% and Fusarium 80–100%). Stored cereals were contaminated by species of Penicillium 75–82.8%, Aspergillus 2.5–27.1% and Fusarium 57.1–82.5%, with a somewhat higher degree of contamination in the nephropathic area. Ochratoxin A occurs on cereals on the whole territory of the SR of Croatia, but average concentrations are higher in the nephropathic area (45% of the positive findings of OA were over 2 mg/ kg). Residues of OA in the kidneys (16–77 μg/ kg), liver (0–21 μg/kg) and blood (36–77 μg/l) were detected in 38 organs taken from swine in the nephropathic area, but this toxin was not found in the 6 samples taken from the non-nephropathic area. In the same organs histopathological changes were found in the kidneys (interstitial nephritis with parenchymal degeneration of the distal parts of the tubular epithel) and liver (interstitial hepatitis with fatty degeneration of the liver).

Equilibrium Properties of TTF-TCNQ

Abstract: The purpose of this text is to discuss the thermodynamical properties of TTF-TCNQ, this being a prototype of organic conductors with two families of conducting chains. It belongs to an even wider class of linear chain compounds which are currently attracting a lot of attention by their unusual properties. A recent paper [1] (henceforth Paper I) reviewed the thermodynamical properties of conducting trichalcogenides and gave a short historical introduction to the physics of quasi-one-dimensional (quasi-1d) materials. In particular, its introduction places TTF-TCNQ among other quasi-1d materials. Therefore, we shall not repeat the same discussion here but rather emphasize that the main idea of the two joint papers is an attempt at synthesizing experiment and theory, which is focused on a given class of materials. Such approach has the advantage that it rationalizes the experimental situation in a specific way but the obvious price to pay is that some definite, though more or less justified options are then required. While we shall try to point out carefully the remaining alternatives, it should be kept constantly in mind that some definite choices have been made here. Like an earlier similar attempt [2], this paper thus represents rather a view than a review of TTF-TCNQ, intention being to give a broad basis for further discussions and improvements in the understanding of this interesting class of materials. Such approach has been chosen because TTF-TCNQ and related materials have been thoroughly reviewed lately [3,4].

The in vivo evaluation of poly(lactic acid) microcapsules of pilocarpine hydrochloride

Abstract: Poly(lactic acid) microcapsules of pilocarpine hydrochloride were prepared and evaluated by measuring a miotic effect in rabbits. The microcapsule suspension showed prolongation of miosis and an improved a when compared with a standard eye dosage form.

Center-of-mass correction and confinement radii of the composite vector bosons.

Abstract: Describing a composite W boson by a center-of-mass--corrected bag model one finds a relation R/sub W/ /sup 3/M/sub W/ /sup 3// f/sub W/ /sup 2/approx. =R/sub rho/ /sup 3/m/sub rho/ /sup 3// f/sub rho/ /sup 2/ for the confinement radii (R), masses, and coupling constants (f) of W and rho bosons. Using experimental values for f/sub rho/, m/sub rho/, and M/sub W/ and with f/sub W/ = 0.66, one obtains R/sub W//R/sub rho/approx. =2 x 10/sup -3/. f/sub rho/, f/sub W/, and masses can be calculated separately.