Oscillatory Behavior of Critical Amplitudes of the Gaussian Model on a Hierarchical Structure

We studied oscillatory behavior of critical amplitudes for the Gaussian model on a hierarchical structure presented by a modified Sierpinski gasket lattice. This model is known to display non-standard critical behavior on the lattice under study. The leading singular behavior of the correlation length $\xi$ near the critical coupling $K=K_c$ is modulated by a function which is periodic in $\ln|\ln(K_c-K)|$. We have also shown that the common finite-size scaling hypothesis, according to which for a finite system at criticality $\xi$ should be of the order of the size of system, is not applicable in this case. As a consequence of this, the exact form of the leading singular behavior of $\xi$ differs from the one described earlier (which was based on the finite-size scaling assumption).Comment: 9 pages (REVTEX), 2 figures (EPS), Phys. Rev. E (accepted

Critical behavior of loops and biconnected clusters on fractals of dimension d < 2

We solve the O(n) model, defined in terms of self- and mutually avoiding loops coexisting with voids, on a 3-simplex fractal lattice, using an exact real space renormalization group technique. As the density of voids is decreased, the model shows a critical point, and for even lower densities of voids, there is a dense phase showing power-law correlations, with critical exponents that depend on n, but are independent of density. At n=-2 on the dilute branch, a trivalent vertex defect acts as a marginal perturbation. We define a model of biconnected clusters which allows for a finite density of such vertices. As n is varied, we get a line of critical points of this generalized model, emanating from the point of marginality in the original loop model. We also study another perturbation of adding local bending rigidity to the loop model, and find that it does not affect the universality class.Comment: 14 pages,10 figure

Antifungal Activity and Inhibitory Effect on Urease of Some Organo-Mercuric Compounds

A number of aliphatic and aromatic organo-·mercuric compounds of the general formula R-Hg-X, in which R represents a n organic radical and X an anionic radical, were prepared. The antifungal and inhibitory effect of the tested compounds was compared by app ly1ng the aiuxa nographic diffusion method and by measuring the degree of inhibition of urease. It was found that the antifungal activity d epends mainly on the organic radical R and that the antonic radical h as no effect on fungitoxicity

Double Tooth

The form of primary and permanent teeth can differ morphologically from that which is considered normal, completely or in some parts. The changes in tooth form can be hereditary or caused by some disease or trauma. Fusion is a union of one or more teeth during development. Gemination means that two separate morphological units were created by division of the tooth germ. The intention of this study was to state the prevalence of double teeth (fusion and gemination) among the persons tested, as to gender, distribution in the maxilla or mandible, and whether the anomaly occurred bilaterally or unilaterally. The results of this investigation have shown that in a total of examined 3,517 plaster models, a prevalence of double teeth was 0.2%. 57.2% of them were fusioned and 42.9% geminated

Implanto-Prosthetic Rehabilitation of the Mandible by Means of Two Implants

Edentulousness is a considerable problem in Croatia. So far prevention has not become the most important part of the dental profession. On the other hand,poor medical knowledge, reduced rights concerning health insurance costs as well as an increasing number of impoverished people in Croatia has resulted in postponed prosthetic rehabilitation. For the above mentioned reasons the Croatian people suffer from premature loss of their teeth. Also lower jaw atrophy occurs, which makes prosthetic rehabilitation even more difficult to achieve. In spite of some disadvantages, the double-implant borne prosthetic suprastructure has proved to be a simple and good solution to the patient\u27s problem, mainly because it is cost-effective. This particularly applies to Croatia patients. Over the last five years we have placed double -implants in 26 patients, in the anterior region of the mandible. The implants were placed in the region of the lower canine or slightly more mesially. Severe atrophy was determined in 13 patients (50%) which impeded their complete denture wearing even before the implant placement started. However, we made up for the loss in two patients by placing the implants again. This time we placed them slightly more mesially. We made one borne implant complete denture for one patient because the examination revealed severe atrophy in one segment of his mandible. In addition since the osseointegration prognosis for this patient was questionable we decided against any additional surgical treatment. Since the belts of the attached gingiva in our patients were wide enough and the diameters of the implants were not very long, no vestibuloplasty was necessary. We installed ITI, IMZ, ASTRA and Ankylos implants. All systems proved to be equally functional

Protective effect of Gentiana lutea root and leaf extracts against heterocyclic aromatic amines IQ and PhIP produced in thermally processed meat

During high-temperature cooking of protein rich foods, especially meat and fish, heterocyclic aromatic amines can be formed. These amines are a class of potent mutagens that can cause alterations in the structure of DNA and chromosomes. In recent decades, research has been focused on investigating plants and their phytochemicals as potential antimutagens. The aim of this study was to examine the anti-genotoxic effect of methanolic root and leaf extracts of Gentiana lutea against the food mutagens 2-amino-3-methylimidazo[4,5-f]quinoline (IQ) and 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP) produced in thermally processed meat. To determine the protective potential of extracts, the alkaline comet assay was applied. The results obtained indicated strong anti-genotoxic effect of both extracts against the tested mutagens. The highest inhibition of IQ-induced genotoxicity was recorded for leaf extract (72%). Regarding PhiP, root extract achieved inhibition of 80% of DNA damage, so was more successful than leaf extract. The data obtained in this study stimulates further research of G. lutea extracts and its constituents as potential dietary supplements in improving human health. © Published under licence by IOP Publishing Ltd.Conference of 60th International Meat Industry Conference, MEATCON 2019 ; Conference Date: 22-25 September 2019; Conference Code:15329

Comparison of comet assay parameters for estimation of genotoxicity by sum of ranking differences

Genotoxic potential of waters in six rivers and reservoirs from Serbia was monitored in different tissues of chub (Squalius cephalus L. 1758) with the alkaline comet assay. The comet assay, or a single cell gel electrophoresis, has a wide application as a simple and sensitive method for evaluating DNA damage in fish exposed to various xenobiotics in the aquatic environment. Three types of cells, erythrocytes, gills and liver cells were used for assessing of DNA damage. Images of randomly selected cells were analyzed with a fluorescence microscope Leica and image analysis by software (Comet Assay IV Image analysis system, PI, UK). Three parameters (tail length - l, tail intensity - i and Olive tail moment – m) were analyzed on 1750 nuclei per cell type. The procedure for sum of ranking differences (SRD) was implemented to compare different types of cells and different parameters for estimation of DNA damage. Regarding our nine different estimations of genotoxicity: tail length, intensity and moment in erythrocytes (rel, rei, rem), liver cells (rll, rli, rlm) and gill cells (rgl, rgi, rgm) SRD procedure has shown that the Olive tail moment and tail intensity are (almost) equally good parameters; the SRD value was lower for the tail moment and tail intensity than for tail length in case of all types of cells. The least reliable parameter was rel; close to the borderline case were rei, rll, and rgl (~5% probability of random ranking)

Maize yield variations in Northern Serbian and Eastern Croatian regions

Abstract This study evaluates maize yield variations in the Autonomous Province of Vojvodina (Serbia) and Eastern Croatia (Croatia) over a period of eight years. The effect of precipitation and mean air temperatures on maize yields was analysed during June through August, using the weather data issued by the State Hydrometeorological Institutes based in Belgrade (Serbia) and Zagreb (Croatia). Data on total acreages and average yields of maize were obtained from the Serbian and Croatian Statistical Yearbooks (2000-2009). The analysis covering the eight-year period showed that the years 2000 and 2003 were highly unfavourable for maize production (the twoyear yield average in Vojvodina and Eastern Croatia being 3.1 t ha -1 and 3.9 t ha -1 , respectively), as opposed to the two &quot;favourable&quot; years (2005 and 2006) giving an average of 6.2 t ha -1 (Vojvodina) and 6.7 t ha -1 (Eastern Croatia). During the June-August period, the measured precipitation values for the &quot;unfavourable years&quot; averaged 91.5 mm in Vojvodina (Novi Sad) and 112 mm in Eastern Croatia (Osijek), with the average air temperatures in the respective regions being 23.1ºC and 22.9ºC. The corresponding data for the &quot;favourable years&quot; were 326 mm and 380.5 mm, and 20.5ºC and 21.1ºC, respectively. The long-term average values of precipitation and air temperatures measured over the three summer months were similar for Novi Sad (207 mm and 20.4ºC) and Osijek (211 mm and 20.3ºC)