Prilog flori otoka Malog Drvenika

Since there has been to date no account of the flora of the island of Mali Drvenik, we have begun floristic research that is still in progress. We have found 100 taxa of vascular plants (36 families), recorded for this island for the first time.Prigodom florističkih istraživanja na otoku Malom Drveniku pronašli smo 100 svojti vaskularnih biljaka (svrstanih u 36 porodice) koje dosad nisu bile zabilježene na ovom otoku. Floristička istraživanja se nastavljaju

Prilog flori otoka Malog Drvenika

Since there has been to date no account of the flora of the island of Mali Drvenik, we have begun floristic research that is still in progress. We have found 100 taxa of vascular plants (36 families), recorded for this island for the first time.Prigodom florističkih istraživanja na otoku Malom Drveniku pronašli smo 100 svojti vaskularnih biljaka (svrstanih u 36 porodice) koje dosad nisu bile zabilježene na ovom otoku. Floristička istraživanja se nastavljaju

Kinetic Determination of Arsenic(III) as Inhibitor of Victoria Blue 4R Oxidation in Strong Acid Solution

A new selective, sensitive and simple kinetic method was developed for the determination of As3+ traces in solution on the basis of their inhibiting effect on Victoria blue 4R (VB) oxidation by KBrO3 in the presence of HCl. The reaction was followed spectrophotometrically at 596.3 nm. The detection limit was 50.00 ng cm–3. The relative error vas 4.2 % to 1.5 % for As3+ in the concentration range from 80.00 to 350.00 ng cm–3. Also, appropriate kinetic equations were formulated and the influence of different ions upon the reaction rate was studied. The developed procedure was successfully applied to the determination of As3+ in various model and real samples

Error Probability in Redundant Packet Sending over IP Network

In this paper we calculate error probability of packetized signal when method of redundant packet sending is used in IP network. The number of repeated signaling packets from each interval of packetization is determined to achieve the desired error probability. The method for management of this number of repetitions is developed based on the new analysis. This method is especially important in the case of sending signaling criteria of classic telephony network over IP network, because it makes possible to reach the same error probability as in classic telephony network

The psychological basis of attitude towards conspicuous consumption

Upadljiva potrošnja se obično definiše kao oblik ponašanja potrošača koji karakterišu kupovina i akumulacija luksuznih proizvoda kao dokaz materijalnog blagostanja i pripadnosti privilegovanim društvenim grupama. Za osobu koja javno izražava svoju ekonomsku moć, ovo ponašanje predstavlja način da stekne ili potvrdi poželjni društveni status. Dosadašnja istraživanja stava prema upadljivoj potrošnji ukazala su na postojanje određene strukture ličnosti koja izražava sklonost prema ovom vidu potrošačkog ponašanja. Stav prema upadljivoj potrošnji je statistički značajno bio povezan sa konformizmom, narcizmom, makijavelizmom, autoritarnošću, traženjem senzacija, bezobzirnom samopromocijom, određenim interpersonalnim vrednostima i životnim stilovima. Sa druge strane, istraživanja ukazuju na to da se stav prema upadljivoj potrošnji konceptualno značajno razlikuje od srodnih pojmova poput materijalizma, kompulsivne kupovine i konzumerizma u najširem smislu. Dosadašnja istraživanja su utvrdila parcijalne doprinose pojedinih varijabli u rasvetljavanju fenomena upadljive potrošnje...Conspicuous consumption is commonly defined as a form of consumer behaviour characterized by purchase and accumulation of luxury products as a proof of material prosperity and an affiliation with privileged social groups. For a person publicly expressing economic power, this behaviour serves as a way to acquire or confirm a preferable social status. Previous research of attitude towards conspicuous consumption demonstrated the existence of a particular personality structure expressing tendency towards this type of consumption behaviour. The attitude towards conspicuous consumption was statistically significantly related to conformism, narcissism, machiavellianism, authoritarianism, sensation seeking, ruthless self-advancement, certain interpersonal values and lifestyles. On the other hand, research demonstrated that the attitude towards conspicuous consumption is conceptually significantly different from related similar concepts, such as materialism, compulsive spending and consumerism in the broadest sense. Previous research has found partial contribution of individual variables to the clarification of the conspicuous consumption phenomenon..

Modulation of experimental autoimmune encephalomyelitis with trichinella spiralis-derived excretory-secretory antigens

Savremena istraživanja na eksperimentalnim modelima autoimunskih bolesti ukazuju da infekcija helmintom Trichinella spiralis (T. spiralis), inhibira nastanak ili ublažava simptome autoimunskih poremećaja kao što su eksperimentalni autoimunski encefalomijelitis (EAE), eksperimentalni kolitis i dijabetes melitus tip 1. Tokom infekcije parazitom T. spiralis ekskretorno-sekretorni metabolički produkti mišićnih larvi (ES L1) su ključni za interakciju sa organizmom domaćina. Stoga je pretpostavka da su upravo ES L1 produkti odgovorni za modulaciju toka autoimunskih oboljenja. Međutim, tačna uloga ES L1 antigena ovog parazita u modulaciji bolesti, kao i mehanizmi te modulacije nisu još uvek u potpunosti razjašnjeni. Predmet ovog istraživanja bilo je ispitivanje uticaja direktne primene ES L1 produkata kao i dendritskih ćelija (DC) stimulisanih ovim antigenima na tok i modulaciju EAE-a kod DA pacova, sa ciljem da se utvrde mehanizmi imunomodulacije kao i uloga dendritskih ćelija u njima. Ovde prikazani rezultati, dobijeni u in vitro studijama na modelu DC izolovanih iz kostne srži DA pacova, potvrdili su da ES antigeni T. spiralis dovode do delimičnog sazrevanja DC koje se mogu označiti kao tolerogene DC koje se odlikuju niskom produkcijom pro-inflamatornog citokina IL-12p70 i povećanom produkcijom anti-inflamatornog citokina IL-10. U ovom radu prvi put je ustanovljeno da primena DC stimulisanih ES L1 antigenima T. spiralis (DC/ES L1) ima inhibitorni efekat na razvoj EAE-a kod DA pacova kao i da je ovaj efekat dozno zavisan. Najveći uticaj na smanjenje težine bolesti ostvaren je primenom doze od 5 x 106 DC/ES L1. Mehanizam koji je u osnovi ovog fenomena zasniva se na polarizaciji imunskog odgovora u pravcu Th2 i regulatornog tipa praćenog povećanom produkcijom Th2 i anti-inflamatornih citokina (IL-4, IL-10 i TGF-β), a smanjenom produkcijom pro-inflamatornih citokina IFN-γ i IL-17. Takođe, dolazi do povećanja procentualne zastupljenosti CD4+CD25+Foxp3+ regulatornih T-limfocita (Treg) na sistemskom nivou u slezini i na nivou ciljnog organa, u CNS-u...Recent studies indicated that Trichinella spiralis infection could successfully ameliorate or even prevent a number of autoimmune diseases established in animal models, such as experimental autoimmune encephalomyelitis (EAE), experimental colitis, type 1 diabetes mellitus. During the course of infection parasite T. spiralis communicates with the host organism and affects cells of the immune system through excretory-secretory products (ES L1) released from the muscle larvae. Mechanisms by which ES L1 influences polarization of immune response and its role in immunomodulation of autoimmune diseases has not been elucidated yet. In the current study, the potential of T. spiralis ES L1 products, injected directly or co-cultivated with dendritic cells (DCs), to promote immune regulation and control EAE development were investigated in order to reveal mechanisms of ongoing immunomodulation and the role of DCs in it. Results presented here confirmed that in vitro stimulation of DCs with T. spiralis ES L1 antigens led to partial maturation of these cells, as indicated by expression of the surface markers. Stimulation of DCs from DA rats with T. spiralis ES L1 antigens (DCs/ES L1) also resulted in significant reduction in IL-12p70 production and increased production of IL-10. In this study it was shown for the first time that application of DCs/ES L1 was able to reduce the clinical signs and duration of the EAE in a dose-dependent way, with the dose of 5 x 106 cells being most efficient in reduction of disease severity. The analysis of underlying mechanisms indicated that amelioration of EAE in DCs/ES L1 pretreated animals was due to decreased production of pro-inflammatory (IFN-γ and IL-17), increased production of Th2 and anti-inflammatory cytokines (IL-4, IL-10 and TGF-β), as well as activation of CD4+CD25+Foxp3+ regulatory T cells (Treg) both on systemic level in spleen and in target organ, i.e. spinal cord. Another approach included assessment of the immunomodulatory capacity of prophylactic administration of T. spiralis ES L1 antigens in DA rats applied in different doses and time points before EAE induction..

Međuzavisnost ekonomskog rasta i zagađenja životne sredine zemalja Jugoistočne Evrope

А global desire to achieve prosperity and economic growth has been especially heightened in recent decades, which has led to an increase in the use of natural resources and an increase in GHG emissions, especially carbon dioxide. Consequently, a decrease in energy security, growth and price volatility of natural resources and climate change has occurred. The academy, policymakers, industry and civil society representatives accept that economic well-being and human well-being must be an objective that is achieved without escalating the use of natural resources and negative environmental impacts. Although developed countries are well on their way to achieving these goals, great uncertainty lies with developing countries, as they do not have all the mechanisms and instruments that are needed. Research on the interdependence of environmental quality and economic growth is significant because it provides policymakers with a better understanding of environmental and economic interactions. All of the above provides context and additional information for policymakers to facilitate the selection, creation, and adoption of appropriate policies, pointing to economic and environmental relationships that are often not obvious or intuitive. With a comprehensive theoretical overview of the theories and factors of economic growth and development, as well as an analysis of the integration and interdependence of the economy and the environment, one of the most significant contributions of this doctoral dissertation is a detailed description of the methodology and results of the econometric analysis of the panel causality of the nine Southeast European countries from 1995 to 2015. Panel unit root testing and Johansen-Fisher and Pedroni cointegration tests preceded Granger's causality analysis based on the vector error correction model and the Wald test. The results of the research unequivocally point to the existence of a two-way long-run causal link between real gross domestic product, carbon dioxide emissions, energy use, electricity consumption, and gross fixed capital formation. The results of short-term causality analysis are that gross domestic product and gross fixed capital formation in the short run cause changes in all other variables. On the other hand, carbon dioxide emissions, electricity consumption, and energy use do not cause changes in other variables in the short term. Based on all the results, it can be concluded that economic variables in the short run affect all environmental pollution variables, while environmental variables in the short run do not cause changes in the economic variables of the model

Fractal tools in terrorist and financial crime prevention

Information society imposes globalization and universality of values. In these circumstances, terrorism, institutional political violence which targets trying to achieve the morbid fear of provoking a spectacular way, inappropriately given conditions, becomes a real threat not only to the nations but also to politics on the global level. In 1996, the International Monetary Fund estimated that 2–5% of the worldwide global economy involved laundered money. Today, intelligence activities in preventing and combating terrorism include financial investigations and money laundering for the purpose of financing terrorism, resulting in broadening of the scope of data to the level which makes it impossible for human logical evaluation. Technologies development that enables increasing capacity of speed and the amount of data processing has enabled defining, analyzing and exploring more and more models. This led to the idea of computer experiments and simulations trying to get to more complex planning and forecasting for the purpose of countering terrorism and “dirty” money transaction, as highly dangerous, complex and variable phenomena. This presentation aims at quotation the wide spectrum of mathematically founded fractal concepts suited to generate computer models of anti-terrorist activities. In this sense, the logistic behind the items connected with detecting and recognizing degree of terroristic threat by comparing fractal structure of people’s faces, fast search through the databases of faces and fingerprints. The speed of searching processes is of vital importance which promotes the crucial importance of compression and data reduction with preservation of regularity. Especially important are analytic forecasting of missing visual data and forms, to supplement the empirical evidences and records. All these operations are possible with higher degree of knowledge utilization and adaptation of virtual reality in the fight against terrorism and different forms of money laundering. The results indicate that the achievements implementation of the concept of fractals depends on substantial prior knowledge, environmental influences, subsystem integration, decentralization and synchronization, and allows us to come up with similar high information technology models, but not necessarily to enable identification of the authentic features of the various anomalies that result in objectively a social consequences. In this sense, we conclude that the application of information technology in the fight against terrorism, based on the concept of fractals has its place in the arsenal of anti-terroristic prevention

Cytokinins and urea derivatives stimulate seed germination in Lotus corniculatus L.

We studied the effects of various cytokinins and urea derivatives on germination of aged seeds of in Lotus corniculatus L. The following substances were applied: N6-isoprenoid cytokinins (isopentenyl adenine and zeatin), adenine sulfate, N6-aromatic cytokinins (kinetin, benzyladenine) and their N9-ribosides, N-benzyl-9-(2- tetrahydropyranyl)adenine, and urea derivatives (diphenylurea, thidiazuron, and chloro-pyridyl phenylurea). With the exception of adenine sulfate, all cytokinins increased the percentage of seed germination up to twofold, depending on their kind and concentration. It is concluded that cytokinins may be among the missing factors in aged seeds of L. corniculatus contributing to the implementation of their full germination potential. They could be used to improve germination of both freshly harvested and aged seed samples, if necessary.

Metal rings and discs Matlab/Simulink 3D model for ultrasonic sandwich transducer design

Metal-endings are integral part of different ultrasonic sandwich transducers. In this paper a new Matlab/Simulink 3D model of the finite metal rings and discs of various dimensions is realized. With this model, which describes both the thickness and the radial resonant modes, and the coupling between them, mechanical impedance of the sample can be easily computed. Resonance frequency-length curves for rings and disks with various materials and for different selected dimensions are given. Also, comparisons of the different approaches in determining of their resonant frequencies are shown. The proposed Matlab/Simulink model requires simpler implementation than other analytical models. That enabled modifying of 1D theory and simplified modelling and projecting of the ultrasonic sandwich transducers with short-endings. Finally, the computed and experimental results are compared. [Projekat Ministarstva nauke Republike Srbije, br. TR33035, br. III43014 i br. OI172057