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Search Results: 1 - 10 of 1034 matches for " Mirjana Mladenovic "
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Content of heavymetals in Gentiana lutea L. roots and galenic forms
Journal of the Serbian Chemical Society , 2007,
Abstract: An experimental field for the cultivated production of Gentiana lutea L. was established five years ago at the Suvobor Mountain, Serbia. Soil analysis of this area revealed the occurrence of high pseudo-total (Ni – 1270 mg/kg, Cr – 423 mg/kg, Co – 385 mg/kg) and available (especially Ni – 133 mg/kg) heavy metals contents in the soil. Hence, the aim of this research was to evaluate the quality of Gentiana lutea L. – roots and galenic forms (liquid extract in 70 % ethanol, spissum and siccum) produced from the roots, because, for most plants, heavy metals accumulate in the root tissue. The amounts of Ni and Cr found in the analyzed roots were very high (54 mg/kg and 14 mg/kg, respectively). The efficiency of ethanol in extracting heavy metals from the roots varied depending on the particular element. The highest efficiency was obtained for Ni (41.3 %), then for Cd (39.5 %), Pb (37.0%) and Co (30.4 %). According to this, a potential hazard exists for humans, if gentian's galenic forms are produced from the raw material with high heavy metals contents. It is concluded that quality control of the raw material must be carried out before further utilization of gentian.
Some negative chemical properties of acid soils
Journal of the Serbian Chemical Society , 2005,
Abstract: Some important chemical properties of various samples of two types of acid soil fromWestern Serbia (pseudogley and brown forest) are presented in this paper.Mobile Al was found in elevated and toxic quantities (10–30 mg/100 g) in the more acid samples of pseudogley soil. All samples of brown forest soil were very acid and the quantities ofmobile Al were in the range from 12.8 to 90.0mg/100 g. In a selected number of pseudogley soils, the influence of pH and other soil properties on the mineralization and nitrification processeswas investigated. Strong inhibition of nitrification at low soil pH was found to be related to high quantities of mobile Al. At pH values less than 4.0 (in 1 M KCl), processes of chemical nitrification and denitrification of applied nitrites were registered in the pseudogley soils.
Ivana Mladenovic
Acta Medica Medianae , 2003,
Abstract: Football is very popular game all over the world and in SCG as well.Every year in Yugoslavia girls and women are from 7 to 40 years take part in the game of football as a sport as well as a sort of recreation. Technically and tactically this game more and more resembles the male football. The process of training is close to the very edge of female abilities, so we have dynamic game full of duel, long shots and spectacular goals.The aim of this research is to confirm differences of developing characteristics and functional abilities female football players and women who don't train any sport actively.The research encircled 20 female football players members of football club Masinac (winner of 2003 competition). The control group consisted of 20 female students who didn't go in for any sport actively.The results show that the average height of female football players is 166.85 ± 5.47 cm and average height of control group is 166.11 ± 5.6 cm. Relative values of maximal oxygen up take is 63.14 ± 8.11 ml/min/kg and 55.43 ± 7.25 for control group. This result show that bought group have aerobic abilities higher than one of average women (30-40 ml/min/kg).
Probing the structure and dynamics of molecular clusters using rotational wavepackets
Gediminas Galinis,Cephise Cacho,Richard T. Chapman,Andrew M. Ellis,Marius Lewerenz,Luis G. Mendoza Luna,Russell S. Minns,Mirjana Mladenovic,Arnaud Rouzée,Emma Springate,I. C. Edmond Turcu,Mark J. Watkins,Klaus von Haeften
Physics , 2014, DOI: 10.1103/PhysRevLett.113.043004
Abstract: The chemical and physical properties of molecular clusters can heavily depend on their size, which makes them very attractive for the design of new materials with tailored properties. Deriving the structure and dynamics of clusters is therefore of major interest in science. Weakly bound clusters can be studied using conventional spectroscopic techniques, but the number of lines observed is often too small for a comprehensive structural analysis. Impulsive alignment generates rotational wavepackets, which provides simultaneous information on structure and dynamics, as has been demonstrated successfully for isolated molecules. Here, we apply this technique for the firsttime to clusters comprising of a molecule and a single helium atom. By forcing the population of high rotational levels in intense laser fields we demonstrate the generation of rich rotational line spectra for this system, establishing the highly delocalised structure and the coherence of rotational wavepacket propagation. Our findings enable studies of clusters of different sizes and complexity as well as incipient superfluidity effects using wavepacket methods.
Mobile and Terrestrial but Firmly Rooted on the River Banks: Biological Anthropology of Lepenski Vir and the Iron Gates Gorge Mesolithic  [PDF]
Mirjana Roksandic
Advances in Anthropology (AA) , 2012, DOI: 10.4236/aa.2012.23014
Abstract: Archaeological interpretation often links both the European Mesolithic and the complexity with reduced mobility and permanent or semi-permanent settlements. The Iron Gates Gorge (IGG) Mesolithic, on the banks of the Danube, with substantial formal disposal areas for the dead and canonized architecture, especially as manifested at the site of Lepenski Vir, fully conforms to this notion. Different aspects of bioarchaeological analysis – when evaluated concurrently – offer a counter-intuitive picture: at the time of its most complex development, the site of Lepenski Vir represented a focal point for a larger, more mobile hunter-gatherer group that identified with the site, its burials and its smaller resident population. The article explores the evidence provided by human skeletal remains and possible reasons behind these contradictory results.
The Reconstruction of Sociology in Eastern Europe—Expectations and Dilemmas  [PDF]
Mirjana Ule
Sociology Mind (SM) , 2014, DOI: 10.4236/sm.2014.44027
Abstract: The article raises two questions: why do sociologists in Western Europe hold expectations of theoretical innovations in sociology in (post-)transitional Eastern European countries, and why is it that sociologists from Eastern Europe do not meet these expectations. The assumption is that these expectations are primarily a response to the theoretical crisis of modern sociology itself, rather than the effect of its knowledge of changes in transitional countries or its willingness to really listen to sociologists from those countries and accept them as equal partners. The attempt to answer the second question involves an analysis of the multilayered reality of sociology in post-socialism, including the loss of the socialist and civil-society utopias which have been replaced by pragmatic endeavors to re-establish a market society and its institutions. Despite the differences between the social situations in the East and West, today’s “Eastern” and “Western” social scientists are confronted by similar global problems and challenges. While the present crisis of the capitalist economy and neo-liberalism certainly has its structural causes, what needs to be questioned here are the very assumptions underlying the world order and the key mechanisms of its functioning.
Automated Proving Properties of Expectation-Maximization Algorithm using Symbolic Tools
V. Mladenovic,M. Lutovac,M. Lutovac
Telfor Journal , 2012,
Abstract: In many analyses based on estimating the parameters of probability distribution functions, the algorithms are developed for unknown probabilities. Some algorithms are derived starting from previous solutions and algorithms. One very popular algorithm is the EM (Expectation-Maximization) algorithm. The EM algorithm is a starting point for developing other advanced algorithms. Features of EM and other algorithms are observed with the traditional numerical approach. In this paper, we present a new approach of analysing the EM algorithm using computer algebra tools (Mathematica). We automatically derive properties of the algorithm. The knowledge embedded in symbolic expressions was used to simulate an example system and EM algorithm to generate the implementation code and to understand the nature of the error produced by selecting the total number of observed elements.
Postoperative Radiotherapy in Early and Operable Breast Cancer
Jasmina Mladenovic,Nenad Borojevic,Dusan Mileusnic
Acta Medica Saliniana , 2012, DOI: 10.5457/ams.170.10
Abstract: Breast radiotherapy (RT) has changed over the passed few decades mainly due to changes in locoregional treatment of the breast cancer and improvements in technology of radiotherapy equipment. It has now become the standard part of the breast conserving procedure, as well as in patients who underwent mastectomy with T3 and/or 4 or more positive nodes in axilla. In treatment of ductal carcinoma in situ, postoperative RT after lumpectomy is almost always required, because it reduces ipsilateral invasive and DCIS recurrence by approximately 50-60%. For invasive breast cancer RT decreases the locoregional relapse rate by 70%. The indication for postoperative RT and the definition of the target volumes depend on the prognostic factors and surgical procedures. The overview by the Early Breast cancer Trialists’ Collaborative Group (EBCTCG) demonstrates for the first time, that postoperative RT is not only important in achieving loco-regional control, but also has significant influence on long-term survival. This benefit of postoperative RT is achieved by proper indication of RT and more importantly by using modern RT techniques that can avoid the serious late side-effects.
Is Evidence-Based Conservation Applied in Urban Forestry? A Case Study from Toronto, Canada  [PDF]
Adam R. Martin, W. Eric Davies, Danijela Puric-Mladenovic, Sandy M. Smith
Open Journal of Forestry (OJF) , 2014, DOI: 10.4236/ojf.2014.41005

Evidence-based conservation seeks to incorporate sound scientific information into environmental decision making. The application of this concept in urban forest management has tremendous potential, but to date has been little applied, largely because existing scientific studies emphasize the importance of urban forests in large-scale ecological and anthropogenic processes, but in practice, scientific evidence is ostensibly incorporated into North American urban forest management only when deciding the fate of individual trees. Even under these disjunctive conditions, the degree to which evidence influences tree-level decisions remains debatable. In analyzing preliminary data from a case study from Toronto, Canada, we sought to test if and how scientific evidence factored into the decision to remove or preserve 53 trees, located in close proximity to a provincially significant area of natural and scientific interest (ANSI). We found that by far the strongest tree-level correlate of the recommendation to remove or preserve trees was whether or not an individual tree was in conflict with proposed development. In comparison, species identity, tree condition, and suitability for conservation were statistically unrelated to the final recommendation. Our findings provide the basis to expand our analysis to multiple case studies across Canada, and internationally. Furthermore, when interpreted with available research and policy, our preliminary (and future) analysis highlights clear opportunities where scientific evidence can and should be readily incorporated into urban forestry management and policy.

The Nature, Sources, Detections and Regulations of Mycotoxins That Contaminate Foods and Feeds Causing Health Hazards for Both Human and Animals  [PDF]
Osama O. Ibrahim, Mirjana Menkovska
Journal of Agricultural Chemistry and Environment (JACEN) , 2019, DOI: 10.4236/jacen.2019.81004
Abstract: Mycotoxins are toxic secondary metabolites produced by fungus kingdom. Fungi (molds) under aerobic and optimum conditions of humidity and temperature consume nutrients for proliferation and mycotoxin production (secretion). There are seven major groups of mycotoxins produced by different species of toxigenic fungal genus. Mycotoxins production from these toxigenic fungi depends on the surrounding intrinsic and extrinsic environments. These seven mycotoxins groups that contaminate grains, foods and animal feeds are: Aflatoxins, Trichothecene, Ochratoxins, Ergot alkaloid (Ergolin), Fumonisins, Patulin, and Zearalenone. These mycotoxins are capable of causing health hazards and death for both human and animals by effecting mammalian cells, causing a number of problems in normal cell function and a wide variety of clinical symptoms of diseases. These mycotoxins are varied in their toxicity depending on the infected host (human or animal) and the host susceptibility (immunity). The major concern of food and feed industries is the contamination of food products and animal feed supplies by these mycotoxins. Worldwide Health Organization (WHO), and Food and Agriculture Organization (FAO) are responsible to regulate the acceptable (tolerable) levels of these mycotoxins in grains, food and feed supplies to ensure the safety and health for both human and animals. Understanding fungal ecology and factors that affect fungal proliferation and mycotoxins production by these toxigenic fungi in agriculture crops as raw materials for both human food and animal feed products, plus understanding the chemistry and property of these mycotoxins, methods of detection, illness symptoms, and comply with regulatory guidance established by World Health Organization (WHO)/Food and Agriculture Organization (FAO) are key factors to prevent or minimize foods/feeds contamination and the toxicity of these mycotoxins for both human and animals health, plus reducing economical loss.
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