Stevan Avramov

• University of Belgrade

Statement of problem: The stereo-optical method can be used for assessment of strains and deformations of different fixed or removable prosthodontic constructions. Material and methods: The study used two master casts of a lower jaw with bilateral terminal edentulous seats. Their topography was identical, with missing lower molars, the left lower s...

Periodontitis, a prevalent inflammatory condition, affects the supporting structures of teeth, leading to significant oral health challenges. Traditional treatments have primarily focused on mechanical debridement, antimicrobial therapy, and surgery, which often fail to restore lost periodontal structures. Emerging as a novel approach in regenerati...

The invasion of non-native plant species has a detrimental effect on native biodiversity. In a seven-year research project, we investigated the occurrence of the invasive species Asclepias syriaca L.in the Deliblato Sands protected area, located at a south-eastern part of the Pannonian Plain, and identified the factors that contribute significantly...

Introduction: This study aimed to investigate the possibility of applying the hyperlight fluid fusion essential complex in dental plaque control, and to evaluate the effectiveness of new and modern agents used for the prevention and early treatment of gingivitis. Methodology: The study included 60 subjects randomly divided into two groups. The c...

Purpose: The aim of this investigation was to determine whether the facial esthetics of subjects rated as “attractive” can be related to specific cephalometric soft tissue parameters. Methods: The profile silhouettes of 100 subjects (45 males and 55 females) were rated by 60 esthetics specialists (20 orthodontists, 20 dentists, and 20 plastic surge...

Introduction/Objective Somatosensory evoked potentials are a neurophysiological tool for testing the effects of drugs in humans and animals. The aim of this study was to estimate the way that bromazepam and ibuprofen had on tooth pulp-evoked potentials (TPEPs) after non-painful stimuli, as well as to detect possible differences in this activity. Me...

Campylobacter jejuni (C. jejuni) is one of the most frequent causes of bacterial enterocolitis globally. The disease in human is usually self-limiting, but when complications arise antibiotic therapy is required at a time when resistance to antibiotics is increasing worldwide. Mechanisms of antibiotic resistance in bacteria are diverse depending on...

A plant’s main mechanism to diminish the effects caused by high free radical levels generated during high irradiance is the synthesis of various secondary metabolites. In addition to interspecies differences, their concentrations may be influenced by genetic, ontogenic, morphogenetic or environmental factors. We investigated the influence of geneti...

Phenotypic correlations were calculated and the levels of phenotypic integration of three congeneric species, annual Lamium purpureum and perennial Lamium album and Lamium maculatum, were estimated. Calculations were performed separately for different stages of development during transplantation under different density and light treatments. L. purp...

In this study we compared the biomonitoring potential of various types of flower asymmetry indices in Iris pumila (Dwarf Bearded Iris). We chose 197 naturally growing clones from the arid steppe habitat in the largest sandy area in Europe (Deliblato Sands Nature Reserve), and we transplanted two replicates of each clone to a polluted highway site w...

This study was aimed at investigating the phytochemical composition and antioxidant capacity of rhizomes, above‐ground vegetative parts and flowers of three Iris species: Iris humilis georgi, Iris pumila L. and Iris variegata L. UHPLC‐Orbitrap MS analysis was used for determination of phytochemical profile. Total pigments, phenolics, flavonoids, so...

Background/Aim. The sudden and excruciating pain that characterizes paroxysmal trigeminal neuralgia (PTN) has a negative effect on the wellbeing of the affected individuals, causing psychological distress. Salivary alpha-amylase (sAA) level represents an objective assessment of physical, physio-logical, and psychological stress. Evoked potentials (...

The presence of certain elements in the soil controls their bioavailability to the plant. Uptake of elements depends on their concentration, solubility of occurring form and soil properties. Also, the propensity of the plant for the bioaccumulation process will condition the transfer of ions of elements from the soil to the various parts of the pla...

Introduction: Iris humilis ssp. arenaria (Waldst. & Kit.) A. Löve & D. Löve (Sandy iris; Iridaceae) is a Pontic-Pannonian endangered and protected species occurring in southeastern and southern part of Central Europe. This is a pioneer species of sandstone (Festucion vaginatae Soó 1929) and steppe (Festucion rupicolae Soó 1940) habitats, but in the...

Several different strategies for control and eradication of Classical Swine Fever (CSF) were compared using a Monte Carlo method-based simulation model. Th e control strategy analyzed in this paper, in addition to other CSF control measures, includes application of biosecurity measures on pig farms and rural backyard holdings. Elements of the contr...

In light of the increasing need for appropriate, cost-effective detection methods of anthropogenic pollution, we evaluated the biomonitoring potential of flower developmental instability (DI) on a widely planted decorative species, Iris germanica, under in situ conditions. DI was measured by fluctuating and radial asymmetries of parts of Iris germa...

Several different strategies for control and eradication of classical swine fever (CSF) were compared using a Monte Carlo method-based simulation model. The control strategy analysed in this paper, in addition to other CSF control measures, includes application of biosecurity measures on pig farms and rural backyard holdings. Elements of the contro...

We analyzed genetic variability and phenotypic plasticity of flowering pattern and reproductive success in 97 clonal genotypes of Iris variegata originating from contrasting light habitats in Deliblato Sands and expressed under different experimental light conditions. Rhizome segments were taken from each of these clones and transplanted in the exp...

The amount and pattern of individual phenotypic responses to seasonal changes in environmental conditions were determined in clones of Iris variegata growing in differing light habitats. For the purpose of the study, 97 clonal plants of the rhizomatous herb I. variegata that experienced different light conditions in their two native habitats were s...

The amount and pattern of individual phenotypic responses to seasonal changes in environmental conditions were determined in clones of Iris variegata growing in differing light habitats. For the purpose of the study, 97 clonal plants of the rhizomatous herb I. variegata that experienced different light conditions in their two native habitats were s...

During their evolution plants developed a set of mechanisms to adapt to the varying environmental conditions, resulting in diversified phenotypes. We were interested in the response of plants towards changing environmental parameters, to light in particular. For this study we selected genotypes of Iris variegata that experienced different light con...

The function of flowers, as the reproductive organs of plants, can be altered by changes in the size and shape of their constituent parts in traffic-related air polluted areas. The aim of this work was to compare the length, width, centroid size and shape (using a set of shape variables - partal warps) of Iris pumila standards (petals) from an urba...

Introduction Nepeta species contain a variety of secondary metabolites, including iridoid monoterpenes – nepetalactones and phenolic acids – that are considered the main bioactive constituents. This work represents the first attempt to comparatively explore variations in these two major groups of secondary metabolites within the genus. Objective T...

In this study, we analyzed fluctuating asymmetry (FA) of black locust (Robinia pseudoacacia) leaf traits as a measure of developmental instability in polluted and unpolluted habitats. We aimed to evaluate the potential of this method as a biomarker and its applicability on widely distributed species under in situ conditions. Leaf samples were taken...

In this work, we investigated the suitability of the threatened species, Iris pumila L., as a possible bioindicator of traffic pollution in its natural habitats (mostly protected areas and natural reserves). We examined its potential to accumu-late lead (Pb) and nickel (Ni) in polluted habitats, and the genetic variability for this capability, sinc...

2013): Between-clone, between-leaf and within-leaf variation in leaf epidermis traits in Iris pumila clones.Genetika, Vol 45, No. 2, 297-308. The goal of this study was to analyze variation and covariation in epidermal characteristics (epidermal cell density -ECD, stomata density -SD, and stomata index -SI) on Iris pumila clones on between-clone, b...

The content of secoiridoid glycosides in the aerial parts and roots of in vitro grown centaury (Centaurium erythraea Rafn) plants, originating from 52 Balkan Peninsula populations was analyzed. The results of this study give insight into the infraspecific variability of centaury, based on the yield of secoiridoid glycosides as chemical markers of p...

Previous studies revealed significant phenotypic plasticity, genetic variability and population differentiation of flower morphometric traits on dwarf bearded iris Iris pumila. Also, study of I. pumila flowering phenology revealed significant impact of habitat type as well as population differentiation for flowering time. Since the flowering time c...

Previous studies revealed significant phenotypic plasticity and between-population differentiation in flower morphometric traits of Iris pumila in response to environmental variability between natural shade and exposed habitats. Since these habitats differed in flowering times as well, in this work we investigated at which stages of flower bud deve...

Evolutionary studies on the dwarf bearded iris, Iris pumila L., a perennial clonal monocot with hermaphroditic enthomophylous flowers, have been conducted during the last three decades on plants and populations from the Deliblato Sands in Serbia. In this review we discuss the main advantages of this model system that have enabled various studies of...

Response to environmental heterogeneity caused by human activity was analyzed on Iris pumila reciprocal transplants between native steppe and anthropogenic (planted pine forest) habitats that were monitored during several growing seasons in a protected area of Deliblato Sand. Morphometric traits exhibited significant plastic responses to the enviro...

In order to analyze changes in biomass allocation patterns across genetically structured populations where plants are compet- ing for access to light, we performed glasshouse experiment with controlled genetic identity of competitors. Clonal replicates of 17 Lamium maculatum (L.) genotypes were grown in three treatments: control (low competition fo...

Adaptive values of plasticity in Iris pumila leaf traits (morphological: SLA, specific leaf area; anatomical: SD, stomatal density; LT, leaf thickness; VBN, vascular bundle number; SW, sclerenchyma width; CW, cuticle width, and physiological: ChlT, total chlorophyll concentration; ChlA/B, chlorophyll a/b ratio) were tested at three irradiance level...

Magnitude and variation in leaf plasticity were quantified in two Iris pumila (L.) populations from habitats of contrasting light conditions (open dune vs wood understorey) at three light intensities (high - 110, medium - 65, and low - 29 μmol m -2 s -1). Siblings developed from hand-pollinated seeds from 13 and 15 clonal genotypes in an open and a...

In current quantitative genetic models, the trade-off is viewed as a dynamic relationship between competing fitness components, which will evolve as a consequence of selection. Selection can change both the intercept and slope of the trade-off function, although it changes the former more strongly than the latter. We tested these predictions by exa...

 Plastic responses to photoperiod of Iris pumila leaf phenological traits were investigated in two populations experiencing contrasting light conditions in the dune system at Deliblato Sands (44°48′ N, 38°58′ E; Serbia, Yugoslavia). The population “Dune” occupied an exposed area at the top and slope of a relatively large dune, and the population “W...

A multivariate selection analysis has been used to test the adaptiveness of several Iris pumila leaf traits that display plasticity to natural light conditions. Siblings of a synthetic population comprising 31 families of two populations from contrasting light habitats were grown at an open dune site and in the understory of a Pinus nigra stand in...

Seedlings of Iris pumila L. were raised at two light levels in a growth room to test two hypotheses: first, that the functionally and developmentally related traits are highly integrated in the phenotype and tend to be inherited together and second, that a difference in light regime does not alter the overall pattern of morphological integration at...

The variation in the maternal effects on a number of the earlyIris pumila seedling traits expressed under high and low light levels in a growthroom was studied. A reciprocal crossing design was used for the establishment of 20 full-sib families. Each family consisted of two maternal groups differing only in genotype used as a seed parent. Maternal...