Publications

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    ABSTRACT: UV/VIS spectroscopic characterization of glasses is a part of the standard procedure. The reasons to do it is to ensure UV eye protection and characterization of material transparency. However, we extend this research to IR domain because the quality of glasses depend not only on UV protection and their transparency but on complementarities and compatibility of eye vision with optical device, also. We characterized basic material of glasses by UV/VIS/NIR and novel method Opto-magnetic Imaging Spectroscopy (OMIS). Then we doped basic material with fullerenes, and characterized them using the same procedure. Results are presented and discussed
    FME Transactions. 04/2014; 42(2):172-176.
  • T. Jovanovic, Dj. Koruga
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    ABSTRACT: The range of validity of QCFF/PI calculations in predicting the vibrational frequencies of the stable C76 isomer with D2 symmetry is determined, based on recent experimental results. An excellent correlation was found between the previously reported theoretical data and the recently obtained experimental results for C76 over the relevant spectral range for the identification of fullerenes. These results show that there is no systematic error in the calculations in the significant region, an assumption that was based on a previous comparison with partial experimental results.
    Chemical Physics Letters 04/2014; 577:68–70. · 2.15 Impact Factor
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    ABSTRACT: Samples of soil can be used as a valuable tool in criminal investigations because of its transferability from different locations. The analysis of soil found on the criminal or his tools could provide clues about the origin of soil and movements of the suspect and thus be used as a proof in investigation by providing important linkage between a criminal and the crime scene. Presented research used Fourier Transformed Infrared Spectroscopy (FTIR spectroscopy) and multivariate analysis (MVA) in order to make discrimination between the soil samples collected on various locations in two cities in Serbia. For each soil sample the spectral profile is like a fingerprint for that type of soil, and could be used for its identification, characterization and discrimination from other soil samples. Multivariate analysis was performed using FTIR spectra of the soil samples in the form of Principal Component Analysis (PCA) and Soft Independent modelling of Class Analogies (SIMCA). Multivariate analysis on FTIR soil spectral data showed that it is possible to achieve good discrimination between soils found on different location based on their FTIR spectra. These results show that FTIR spectroscopy and multivariate analysis could be used as a forensic tool for determination of origin of soil samples.
    INTERNATIONAL SCIENTIFIC CONFERENCE ARCHIBALD REISS DAYS ACADEMY OF CRIMINALISTIC AND POLICE STUDIES, ZEMUN, BELGRADE; 03/2014
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    ABSTRACT: The basic C60 and C70, and the higher fullerenes, mainly C76 and C84 were extracted with a series of different and previously unapplied solvents or combinations of solvents, by original advanced procedures, from the samples of carbon soot, produced in electric arc. The solubility of the basic and the higher fullerenes in the applied series of solvents was compared. Chromatographic separations of fullerenes from the obtained extracts were performed by continue elution, in one phase of each process, under atmospheric pressure, with the original, defined gradients of solvents, from pure hexane or 5% toluene in hexane to pure toluene, on active Al2O3 columns, by the new, improved methods. Identifications of fullerenes in all the chromatographically purified fractions and the extracts were performed using determined techniques of IR and UV/VIS spectroscopy that have not been presented previously for the higher fullerenes. The advances in chromatographic purification using alumina, as well as in understanding of the unique and the main optical absorption properties of these molecules are reported.
    Fullerenes Nanotubes and Carbon Nanostructures 02/2014; 22(4). · 0.76 Impact Factor
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    ABSTRACT: Electrical impedance measurement data and fractional calculus have been utilized for modeling bioimpedance properties of human skin. We introduced and proposed revisited Cole model using modified distributed order operator based on the Caputo-Weyl fractional derivatives. Our proposed model presents essentially modified single-dispersion Cole model, since it introduces a new parameters k and σ in single-dispersion Cole impedance equation. These parameters characterize the width of interval around fractional index α and they are important for more accurate describing bioimpedance properties of human skin. The impedance spectrum was measured in a finite frequency range up to 100 kHz. Our proposed modified Cole model fits much better to experimental curve in a given frequency range compared to existing Cole models. The fitting is done using the Levenberg-Marquardt nonlinear least squares.
    FME Transactions Faculty of Mechanical Engineering, Belgrade. 01/2014; 42(1):74-81.
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    ABSTRACT: Contact lenses represent biomaterials whose main purpose is to correct the specific refractive anomaly of the eye. Since the visible light on its way to the perceptive part of the eye has to pass through the contact lens, the characteristics of the materials can significantly modify it. Biocompatibility of the lens surface is one of the most important issues in achieving contact lens wear without problems. We have developed new nanophotonic contact lens materials by adding nanoparticles of fullerene and their derivatives into standard PMMA RGP material. The aim of our investigation was to compare the influences of these materials on saline which is similar to tear film. We used NIR spectroscopy based on 12 vibration modes, called Aquaphotomics and Opto-magnetic imaging (OMI) spectroscopy as methods for characterizing the samples. The acquired spectrums were commented and compared with the standard contact lens material, which was analyzed by the same method.
    FME Transactions. 01/2014; 42(1):83-87.
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    ABSTRACT: Background. This experimental study evaluates fetal middle cerebral artery (MCA) circulation after the defined prenatal acoustical stimulation (PAS) and the role of cilia in hearing and memory and could explain signal transduction and memory according to cilia optical-acoustical properties. Methods. PAS was performed twice on 119 no-risk term pregnancies. We analyzed fetal MCA circulation before, after first and second PAS. Results. Analysis of the Pulsatility index basic (PIB) and before PAS and Pulsatility index reactive after the first PAS (PIR 1) shows high statistical difference, representing high influence on the brain circulation. Analysis of PIB and Pulsatility index reactive after the second PAS (PIR 2) shows no statistical difference. Cilia as nanoscale structure possess magnetic flux linkage that depends on the amount of charge that has passed between two-terminal variable resistors of cilia. Microtubule resistance, as a function of the current through and voltage across the structure, leads to appearance of cilia memory with the "memristor" property. Conclusion. Acoustical and optical cilia properties play crucial role in hearing and memory processes. We suggest that fetuses are getting used to sound, developing a kind of memory patterns, considering acoustical and electromagnetically waves and involving cilia and microtubules and try to explain signal transduction.
    BioMed research international. 01/2014; 2014:273932.
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    Djuro Koruga
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    Djuro Koruga
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    Djuro Koruga
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    ABSTRACT: Despite that water is one of the most studied materials today its dynamic properties are still not well understood. Water state in human organism is of high importance for normal healthy functioning of human body. Different kinds of water are usually classified according to its present solutes, and concentrations of these solutes, but though it is known that water molecules can form clusters around present solutes, classification of waters based on types of water molecular organization and present clusters is not present in current literature. In this study we used multivariate analysis for classification of commercial mineral waters based on their near infrared spectra (NIR). Further, we applied Aquaphotomics, a new approach for interpretation of near infrared spectra of water, which gives insight into organization of water molecules in each of these waters.
    Hemijska industrija 06/2013; 68(2):257-264. · 0.46 Impact Factor
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    Contemporary Materials. 05/2013; IV(1):22-32.
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    ABSTRACT: In recent years, interest in policy and among decision–makers in the pre-school education has greatly increased - preschool education has found its place in all the strategic goals and objectives of Serbia. Increasing insights on national (low coverage – particularly children from vulnerable groups; kindergarten services are not used by those who need them most; the network of preschool institutions is inadequate in terms of geographical coverage and spatial capacities; inability of LSGs to bear 80 % of the current cost of preschool education, etc.) , and European levels about the importance of early childhood and education at an early age contributed to the adoption of significant documents (National Millennium Development Goals; The Law on the Foundations of the Education System and the Law on Preschool Education; Education Strategy in Serbia 2020; rules/regulations supporting diversification of preschool programmes; support to the improvement of the quality of educational work, as well as regulations governing the system of self-evaluation and external evaluation; etc…) on the basis of which conditions can be created to increase the number of children with an access to high-quality and diversified preschool programmes. Starting from these prerequisites and supportive atmosphere, both projects have focused on creating conditions to increase the coverage of children age 3 to 5, 5 in less developed areas of Serbia with high quality preschool programmes of different content and duration. For that it was crucial to create new understanding that preschool provision can be improved not only through building new kindergartens and organizing full day programmes, but also through development of diversified programmes adjusted to the needs of children, parents and communities as well as to the capacities of LSG. It was also important to change the current dominant opinion that PE and PIs serve to provide support to the employed parents, implicitly defining its economical function as dominant (social and educational are neglected) and that “one model of whole day programmes can fit all”. This manual is only one part of the toolkit developed to support diversification of the programmes and services; the other two parts are Training Manual and Compendium of good practice.
    1st edited by Impress, 01/2013; Impress, UNICEF., ISBN: 978-86-7452-047-5
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    ABSTRACT: The basic C60 and C70, and the higher fullerenes, mainly C76 and C84, were extracted by original procedures, with p-xylene and the mixture of xylenes from the samples of initial carbon soot, produced in electrical arc. The extracts were obtained in increased and high yields of 6% and 11.9%, respectively, due to application of the advanced procedures. The solubility of fullerenes in these solvents was compared. Chromatographic separation of the basic and the higher fullerenes from the obtained p-xylene extract was performed by continue elution, in one phase of the process, under atmospheric pressure, with original, defined gradient of solvents, from pure hexane to 75% toluene in hexane, on active Al2O3 column, by a new, improved method. Comparative spectroscopic characterization of the obtained purified fullerene fractions and the extracts is reported. The IR and UV/VIS techniques that have not been presented previously for the higher fullerenes were employed as a contribution to better introduction of their optical absorption properties.
    Fullerenes Nanotubes and Carbon Nanostructures 01/2013; 21(1). · 0.76 Impact Factor
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    Djuro Koruga
    Edited by Obradovic B, 04/2012; Springer., ISBN: 978-3-642-21912-2
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    ABSTRACT: According to the most literature data, the skin is usually observed as a simple structure with equivalent electrical model, which includes general properties of epidermis, basal membrane and dermis. In this paper, we analyzed the skin structure as a more complex system. Particularly we analyzed epidermis based on layers approach and its water organization in lipids ordered in sub-layers. Using opto-magnetic spectroscopy method, which is very sensitive to paramagnetic/diamagnetic properties of the tissue, we found out that nanowater structure ordering in lipids of epidermal layers play very important role in skin properties. We use bioimpedance as complementary and compatible method to opto-magnetic spectroscopy in skin characterization. In our investigation we found out the dierence of the skin properties of the people who are drinking two dierent type of water (Z and N). We observed the signicant dierence in middle part of stratum granulosum, where water-lipid sub-layers exists. These results indicate importance of water nanolayers presence in epidermis and type of drinking water reecting on human skin properties.
    Acta Physica Polonica Series B 03/2012; 12125(87). · 1.01 Impact Factor
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    ABSTRACT: We used carbon soot produced by electrical arc method. Fullerenes, mainly C60 and C70, were Soxhlet extracted from collected soot with chlorobenzene, by modified procedure yielding 5.8% of the extract. Chlorobenzene fullerenes extract was then separated on an active alumina column, modifying the existing methods, by elution with hexane and xylene/hexanes mixtures in determined ratios and orders. Buckminsterfullerene C60 was identified in the first purified fraction using EI mass spectrometry, IR and UV/vis methods. The second and the third purified fraction, carbon soot and chlorobenzene soot extract were characterized by IR and UV/vis methods. Identifications of fullerenes in purified and unpurified forms were analyzed and compared.
    International Journal of Nanoscience 11/2011; 02(03).
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    Djuro Koruga
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    ABSTRACT: The present invention provides a composition of matter hav-ing a harmonized form 10>/$) of a hydroxyl modified fullerene having a molecular formula of C«1OH)xH V 1where x is from loto36, andy is fromoto 24andzis fromoto12) the composition of matter having substantially the same ' C NMR spectra shown in FIG. S having a dominant peak at 170.2 ppm. This peak shows that each carbon atom of C« is equally covered by OH groups and that the system [C601OH) xH V ] '~ is one body entity.
    Ref. No: US 8058483 B2, Year: 11/2011
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    ABSTRACT: Nanotehnologija je dovela do revolucionarnih promena u mnogim naučnim oblastima. Ova tehnologija, koja operiše na skali gradivnih elemenata ljudske ćelije, ima potencijal razvoja uređaja koji su manji i efikasniji od svih do sada postojećih. U suštini ove tehnologije leži minijaturizacija i prednosti koje ona pruža. Primena nanotehnologije u medicini omogućava razvoj novih metoda za rano otkrivanje bolesti i poboljšanje terapijskog učinka, korišćenjem sistema za ciljano delovanje i kontrolisano otpuštanje lekovitih supstanci. Ciljanim delovanjem postiže se delovanje samo na one ćelije koje imaju ključnu ulogu u patogenezi bolesti, čime se smanjuje periferna toksičnost leka, a kontrolisanim otpuštanjem omogućuje se uvek optimalna doza leka u organizmu. Primenu nanotehnologije u farmaciji trebalo bi da prati doza opreza, jer još uvek postoje nerešena pitanja vezana za toksičnost i bezbednost. Ovi problemi očekuju svoje rešenje u nekoliko narednih godina i predmet su intenzivnih istraživanja.
    Drugi kongres doktora medicine Republike Srpske,Teslić: Zbornik radova. 05/2011;
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    ABSTRACT: In the first phase of the process, the higher fullerenes, mainly C76 and C84, as well as the basic fullerenes C60 and C70, in a smaller amount, were Soxhlet extracted with pyridine from the sample of initial carbon soot, produced in electrical arc. The extract was obtained in increased, high yield of 16.4%, due to application of the original procedure. The solubility of fullerenes in this solvent was determined. Chromatographic separation of fullerenes from pyridine extract was performed by continual elution, in one phase of the process, under atmospheric pressure, with original, defined gradient of solvents, from pure hexane to pure toluene, on active Al2O3 column, by a new, improved method. Identifications of fullerenes in the obtained chromatographically purified fractions and pyridine extract of the initial soot were performed using determined IR and UV/VIS techniques that have not been presented previously for the higher fullerenes.
    Fullerenes Nanotubes and Carbon Nanostructures 05/2011; Nanotubes(and Carbon Nanostructures):309-316. · 0.76 Impact Factor

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