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Coarse to Fine: The role of Severe Plastic Deformation in Advancing Titanium-Based Medical implants - A Comprehensive review

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 295-306页

作者： dragana r mihajlo.ić Bojan i Međo ivana Lj Cvijović-Alagić Veljko r Djokić Faculty of Technology and Metallurgy University of BelgradeKarnegijeva 411120 BelgradeSerbia Vinča institute of Nuclear Sci-ences-National institute of the republic of Serbia University of Belgrade11001BeogradSerbia innovation Centre of the Faculty of Technology and Metallurgy Karnegijeva 411120 BelgradeSerbia

This paper describes severe plastic deformation(SPD)procedures,which are utilized to form an ultrafine-grained structure in metallic *** the SPD process,a solid material sample is subjected to very high loads without a significant change in sample *** the present work,the high-pressure torsion(HPT)process,as one of the SPD techniques,which achieves a high degree of deformation and ensures refinement of the microstructure,will be discussed in more *** that grain size control is accepted as a method to obtain materials with desired characteristics,an overview of the properties of ultrafine-grained titanium-based biomaterials to be used in medicine is ***,particular attention is dedicated to the influences of HPT process parameters,primarily hydrostatic pressure,and number of revolutions during torsion,on the grain size and physical and mechanical characteristics(modulus of elasticity,microhardness,and tensile properties),corrosion resistance,and biocompatibility of the titanium-based biomaterials.A review of the literature indicates that titanium-based materials obtained by the SPD process show improved mechanical and physical properties without losing biocompatibility and corrosion resistance,which suggests that these methods of obtaining implants are something that should be further developed in the future.

关键词： high-pressure torsion process ultrafine-grained titanium-based materials electrochemical anodization physical properties mechanical properties

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Effi ciency of phosphorus accumulation by plankton,periphyton developed on submerged artifi cial substrata and metaphyton:in-situ observation in two shallow ponds

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Journal of Oceanology and Limnology 2021年第3期39卷 928-945页

作者： Marija PEĆiĆ Slađana POPOViĆ Vesna MiLUTiNOViĆ Gordana SUBAKOV SiMiĆ ivana TrBOJEViĆ dragana PrEDOJEViĆ institute of Botany and Botanical Garden‘Jevremovac’ Faculty of BiologyUniversity of BelgradeBelgrade 11000Serbia institute of Chemistry Technology and MetallurgyScientific InstitutionNational InstituteCenter for Ecology and TechnoeconomicsUniversity of BelgradeBelgrade 11000Serbia institute of Public Health of Belgrade Belgrade 11000Serbia

Phosphorus overenrichment of shallow ponds prevailing in wetlands leads to their eutrophication causing the collapse of those vulnerable *** potential of phosphorus accumulation by periphyton developed on artificial substrata has been investigated in two shallow ponds(Bara?ka and?iroki rit)in northwest Serbia and compared to the same ability of plankton and *** periphyton substrate carrier has been submerged from May to *** continuously(CS)and monthly developed(MS)periphyton were *** component of all investigated communities has been qualitatively *** accumulation of only 14.7 mg TP/m^(2) was recorded in three-month exposed periphyton *** exposed from July to August reached maximal 12.7 mg TP/m^(2).Plankton community that was characterized by more diverse and abundantly developed algal component was more effective in phosphorus accumulation(0.7 mg/g dry weight)in comparison with dominantly inorganic and diatom-dominated periphyton in Bara?*** conditions caused by recent revitalization(dredging organic matter and mud from pond basin—redigging)as well as rapid desiccation of?iroki rit disabled making an unambiguous conclusion about the efficiency of phosphorus accumulation among different communities,but suggested slight potential of phosphorus harvesting by metaphyton in this *** to the shorter exposure time that brings the reduced risk of unpredictable changes in the ecosystem,as well as the considerable amount of accumulated phosphorus,large-scale application of one-month exposed periphyton developed on artificial substrates would be more advisable for phosphorus harvesting in nutrient affected shallow ponds.

关键词： periphyton phosphorus accumulation shallow ponds (phyto)plankton metaphyton eutrophication

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Ternary Au-Ga-Sb system：calculation of thermodynamic properties using general solution model

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rare Metals 2016年第3期35卷 262-268页

作者： Lidija Gomidzelovic dragana Zivkovic Ljubisa Balanovic Dragan Manasijevic Mining and Metallurgy institute 19210 Bor Serbia Technical Faculty University of Belgrade 19210 Bor Serbia

The calculated results of thermodynamic properties in ternary Au-Ga-Sb system by general solution model were presented in this *** calculations were carried out in nine cross sections from all three corners in the temperature range of 973–1,573 K,and integral molar excess Gibbs energies,partial molar Gibbs energies,activity coefficients and activities for all components are *** activity of gold and gallium shows negative deviation from rault＇s law for all investigated sections,while antimony activity is close to the line of ideal conditions and even coincides with the line for high content of antimony in the *** obtained by calculation were compared with those found in *** is concluded that compared values show reasonable good agreement.

关键词： Alloy thermodynamics Calculation Au-Ga-Sb system General solution model

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insect Hydrocarbons. Biology, Biochemistry, and Chemical Ecology

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insect Science 2012年第6期19卷 703-704页

作者： Sofija Pavković‐Lučić dragana Miličić Luka Lučić (Chair of Genetics and Evolution) (Chair of Animal Morphology Systematics and Phylogeny) (Chair of Animal Development) institute of Zoology Faculty of Biology University of Belgrade Studentski trg 16 11000 Belgrade Serbia Email: sofija@bio.bg.ac.rs draganam@bio.bg.ac.rs luka@bio.bg.ac.rs

Gary J. Blomquist and Anne-Genevirve Bagnbres （eds.）, Cambridge University Press, 2010 iSBN 978-0- 521-89814-0, Hardback, pp. 492, 70.00 Who of us does not know how magic is love dancing in dragonflies, or waggle honebees＇ dance, flushing in the firefly, or traveling of ＂orange cloud＂ during migration of monarch butterflies？ And, if those behaviors are magical for us, how magical are they for themselves？ How special is insect ＂vocabulary＂ during their communication？

关键词： insect Hydrocarbons Biology Biochemistry

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A NOTE ON THE DrAZiN iNVErSE OF A MODiFiED MATriX

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Acta Mathematica Scientia 2012年第2期32卷 483-487页

作者： dragana S.Cvetkovic Jelena Ljubisavljevic Faculty of Sciences and Mathematics Department of MathematicsUniversity of NisVisegradska 3318000 NisSerbia Faculty of Medicine University of Nis

in this article, the expression for the Drazin inverse of a modified matrix is considered and some interesting results are established. This contributes to certain recent results obtained by *** [9].

关键词： Drazin inverse modified matrix perturbation bound

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Characterizations for the Core invertibility and EP-ness involving Projections

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Algebra Colloquium 2022年第3期29卷 385-404页

作者： Honglin Zou dragana Cvetković-ilić Jianlong Chen Kezheng Zuo School of Mathematics Southeast UniversityNanjing 210096China College of Basic ScienceZhejiang Shuren University Hangzhou 310015China Faculty of Sciences and Mathematics University of Nis18000 NisSerbia School of Mathematics Southeast UniversityNanjing 210096China School of Mathematics and Statistics Hubei Normal University HuangshiHubei 435002China

in this paper we obtain some equivalent conditions for the core invertibility and EP-ness of 1−pq,1−pqp,p−pq and p−q,where p,q are projections in different settings,such as∗-rings,∗-reducing rings and C∗-***,several representations for the core inverses of product,difference and sum of two generalized projections are *** particular,a number of examples are given to illustrate our results.

关键词： core inverse projection EP element ring

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Trace element study in Tisa river and Danube alluvial sediment in Serbia

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international Journal of Sediment research 2013年第2期28卷 234-245页

作者： Sanja M.SAKAN Nenad M.SAKAN dragana S.DOrDEViC iCTM Department of ChemistryUniversity of BelgradeNjegoseva 12P.O.Box 81511001 BelgradeSERBIA Dr. institute of Physics University of Belgrade11081 BelgradeP.O.Box 68SERBIA Dr.

The contaminated sediment serves as a long-term source of toxic elements,since that mobility and transport in the environment of these elements are strongly influenced to associated solid *** this study,the modified Tessier sequential extraction procedure was applied for the fractionation of Cd,As,Hg,Cu,Zn,Cr,Pb,Ni and V in the sediments(Tisa river and canal sediments - Danube alluvial formation),to obtain an overall classification of trace element pollution in these areas through its spatial *** of this region are important due to the widespread occurrence of metal mining activities throughout the Tisa and Danube drainage basins and possibilities of contamination with toxic elements at studies *** steps of the sequential extraction procedure partitioned elements into CHCOONHextractable(F1),NHOH·HC carbonate extractable and easily reducible(F), HCO/(NH)COmoderately reducible(F3),HO-HNOorganic extractable(F4),and HCl acid soluble residue (F5).Analyses of the extracts were performed by flame atomic absorption *** indicate the degree of risk of toxic elements,risk assessment code and contamination factor have been *** results of partitioning study indicate that more easily mobilized forms(metals in adsorbed/exchangeable/carbonate forms or bound to amorphous Fe and Mn oxyhydroxides and Fe and Mn oxides) were predominant for copper,zinc,cadmium and lead,which can be used as indicators for input from anthropogenic *** contrast,the largest amount of chromium and nickel were associated with the inert fraction,which reduced their solubility and rendered them immobile under natural conditions and indicative of natural *** of remaining portion of metals was bound to ferromanganese oxides *** is concluded that sequential extraction results proved useful to distinguish between anthropogenic and geochemical sources of elements in the sediments.

关键词： Sequential extraction Modified Tessier procedure Metals Metalloids risk assessment code

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Pesticide-induced photoluminescence quenching of ultra-small Eu3+-activated phosphate and vanadate nanoparticles

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Journal of Materials Science & Technology 2020年第3期38卷 197-204页

作者： Jovana Perisa Zeljka Antic Chong-Geng Ma Jelena Papan dragana Jovanovic Miroslav D.Dramicanin Vinca institute of Nuclear Sciences University of BelgradeP.O.Box 52211001 BelgradeSerbia College of Sciences Chongqing University of Posts and TelecommunicationsChongqing 400065China

The aim of this research was to investigate the luminescent behavior of ultra-small Eu3+-activated phosphate and vanadate nanoparticles in the presence of *** have an average diameter of approximately 2 nm with a narrow size *** monazite crystal structure of phosphate-based particles(space group P121/n1)and single tetragonal zircon-type structure of vanadate-based particles(space group of i41/amd)have been confirmed using X-ray diffraction *** synthesized Eu3+-activated colloidal nanoparticles show sharp emission peaks in the red spectral *** measurements revealed emission quenching upon addition of millimolar concentrations of following pesticides:4-Chloro-2-methyl-phenoxyacetic acid(MCPA),2,4-Dichlorophenoxyacetic acid(2,4-D)and N-(phosphonomethyl)glycine(Glyphosate).in both phosphate and vanadate-based colloidal nanoparticles luminescence quenching is more evident in the presence of 2,4-D pesticide with the lowest limit of detection(0.7μM)obtained for phosphate-based nanoparticles.

关键词： Phosphate/vanadate based colloidal nanoparticles Eu3+ Emission quenching Pesticide

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Trends in in ovo sexing technologies:insights and interpretation from papers and patents

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Journal of Animal Science and Biotechnology 2023年第6期14卷 2239-2262页

作者： Matthias Corion Simao Santos Bart De Ketelaere dragana Spasic Maarten Hertog Jeroen Lammertyn KU Leuven BIOSYST-MeBioS Biosensors GroupWillem de Croylaan 42Leuven B‑3001Belgium. KU Leuven BIOSYST-MeBioS Biostatistics GroupKasteelpark Arenberg 30Leuven B‑3001Belgium. KU Leuven BIOSYST-MeBioS Postharvest GroupWillem de Croylaan 42Leuven B‑3001Belgium.

Numerous researchers and institutions have been developing in ovo sexing technologies to improve animal welfare by identifying male embryos in an early embryonic stage and disposing of them before pain *** review gives a complete overview of the technological approaches reported in papers and patents by performing a thorough search using Web of Science and Patstat/Espacenet databases for papers and patents,*** on a total of 49 papers and 115 patent families reported until May 2023 worldwide,11 technology categories were defined:6 non-optical and 5 optical *** category was described for its characteristics while assessing its potential for ***,the dynamics of the publications of in ovo sexing techniques in both paper and patent fields were described through growth curves,and the interest or actual status was visualized using the number of paper citations and the actual legal status of the *** comparing the reported technologies in papers to those in patents,scientific gaps were observed,as some of the patented technologies were not reported in the scientific literature,e.g.,ion mobility and mass spectrometry ***,more diverse approaches in all categories were found in patents,although they do require more scientific evidence through papers or industrial adoption to prove their ***,although there is a recent trend for non-invasive techniques,invasive methods like analyzing DNA through PCr or hormones through immunosensing are still being reported(and might continue to be)in papers and *** was also observed that none of the technologies complies with all the industry requirements,although 5 companies already entered the *** the one hand,more research and harmony between consumers,industry,and governments is *** the other hand,close monitoring of the market performance of the currently available techniques will offer valuable insights into the potential an

关键词： Animal welfare in ovo sexing Male day-old chick culling Optical and non-optical techniques Patents and papers

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Antibacterial, antifungal and cytotoxic activity of terrestrial cyanobacterial strains from Serbia

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Science China(Life Sciences) 2008年第10期51卷 941-947页

作者： Zorica SVirCEV dragana CETOJEViC-SiMiN Jelica SiMEUNOViC Maja KArAMAN Dejan STOJANOViC Department of Biology and Ecology Faculty of Sciences University of Novi Sad Trg Dositeja Obradovica 2 Novi Sad 21000 Serbia Oncology institute of Vojvodina Institutski put 4 Sremska Kamenica 21204 Serbia

Cyanobacteria are known to be a rich source of biologically active compounds some of which can have pharmaceutical importance. in this work we present the screening results of cyanobacterial strains for their antibacterial, antifungal, and cytotoxic activity. Cyanobacterial strains were isolated from various soil types in province of Vojvodina and Central Serbia, republic of Serbia. The screening included 9 strains of Anabaena and 9 strains of Nostoc. Both, extracellular products (from the culture liquid) and cellular crude lipophilic extracts were tested against 13 bacterial strains and 8 fungal strains. Cytotoxic activity was tested against three human cell lines. Methanol extracts were prepared according to ?stensvik. Antibacterial and antifungal activities were determined measuring inhibition zone, 48 h after inoculation. The cytotoxic activity was determined by sulforhodamine B (SrB) colorimetric assay. Of all cyanobacterial strains tested, 52% showed some antifungal and 41% antibacterial activity. Two out of six tested strains possessed cytotoxic activity. The cytotoxic activity of Anabaena strain S12 was found both in culture liquid and crude cell extract. it occurred specifically between the 21st and 42nd day of cultivation against HeLa and MCF7 cells, but had no activity against cell line derived from a healthy tissue. A high percentage of the active strains among the tested strains justify the effort of screening cyanobacteria that are isolated from terrestrial environments. The most promising strains for the fur- ther study are Anabaena strain S12 which showed strong cytotoxic and antibacterial activity and Ana- baena strain S20 which produces a potent antifungal compound. The future work, besides further screening and chemical identification of the active compounds, should also include the development of culture techniques that would lead to more efficient production of biologically active compounds.

关键词： antibacterial antifungal cyanobacteria cytotoxic screening

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