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Chromium from Hydrolyzed Leather Affects Soybean Growth and Nodulation

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Pedosphere 2019年第1期29卷 95-101页

作者： jovana bavaresco Jess R.FINK Moacir T.MORAES Antonio R.SNCHEZ-RODRGUEZ Ibanor ANGHINONI Department of Soils Federal University of Rio Grande do Sul Laboratory of Soil Federal Institute of Paraná Department of Agronomy University of C'ordoba

Hydrolyzed leather, obtained from industrial leather waste, is an organic nitrogenous fertilizer with a high chromium(Cr) *** crops can be adversely affected by the presence of residual Cr in soil after application of hydrolyzed leather fertilizer. The aim of this work was to assess the effect of hydrolyzed leather on Cr absorption, root development, and symbiotic nodulation of soybean plants grown on three different soils including two Lixisols and a Gleysol. These soils were previously fertilized with hydrolyzed leather at three different rates(0.0, 0.1, and 0.8 kg m^(-2)). Soybean shoot height, root development, nodulation, and mineral nutrient concentrations in plant tissues were determined after 45 d of crop growth. The application of hydrolyzed leather significantly increased Cr content in soil and Cr uptake by plants. Surprisingly, Cr was stored mainly in the aerial part of the plants. The presence of Cr had an adverse impact on shoot dry matter(41% reduction) and number of nodules(49% reduction) per plant grown on the soil with the lowest cation exchange capacity. However, no other significant effect was observed in nodule weight, diameter, or any other measured parameters.

关键词： Cr absorption Cr accumulation plant growth root development symbiotic nodulation

Topographic and lithologic controls behind mountain depopulation in Zlatibor District(Western Serbia)

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Journal of Mountain Science 2020年第2期17卷 271-288页

作者： TELBISZ Tamas BRANKOV jovana CALIC Jelena Department of Physical Geography Eotvos Loránd UniversityBudopestHungary Geographical Institute"Jovan Cvijic"of the Serbian Academy of Sciences and Arts BelgradeSerbia South Ural State University Institute of SportsTourism and Service60Sony Krivoy streetChelyabinsk454080Russia

Mountain depopulation is a worldwide phenomenon observed in all continents. It has varied socio-economic reasons;among others, the low profitability of traditional agriculture, the better job possibilities and the higher level of services in urban settlements. However, it is often recognized that depopulation is related to natural factors such as elevation, slope or lithology. It is also observed that protected areas are frequently established in depopulated mountain regions. Their primary aim is the conservation of nature, but they may help tourism development as well. Tourism, in turn, may slow down or even reverse the process of depopulation. In this study, we investigate the impact of topographic and lithologic factors, namely of karst settings, on mountain demographic processes and the relationship of protected areas and tourism through the example of the northern part of Zlatibor District(Western Serbia). The study area is characterized by mountains and hills at elevations from 200 to 1600 m a.s.l. Our aim is to find GIS-based statistical relationships between topographic, lithologic factors and demographic characteristics. In this area, mountain depopulation started after WWII, and weproved that this process was strongly controlled by topographic factors. The higher and more dissected the area, the more significant is the decrease of the population and the more advanced is the ageing. As a result, population density contrasts are much more pronounced now than 70 years ago. After WWII, depopulation and ageing became gradually more serious on karstic terrains than on non-karst. However, by using compound topographic and lithologic types, we proved that it is not the effect of karst, but the effect of topography. The flow of population from hills and mountains to valleys and basins are closely related to the restructuring of the economic sectors. At present, for the study area, the development of tourism is unequivocally naturebased and connected to protected ar

关键词： Depopulation Ageing National park Tara Mountain Tourism Rural Population density

Investigation of low grade thermal energy storage systems with phase changing materials

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Energy and Built Environment 2021年第4期2卷 366-373页

作者： Law Torres Sevilla jovana Radulovic School of Mechanical and Design Engineering Anglesea BuildingAnglesea RoadPortsmouth PO13DJUnited Kingdom

The use of phase changing materials(PCMs)for energy storage has been in the focus of scientific research for a while,primarily focusing on building cooling/heating applications due to favourable melting temperature *** this paper we simulated the suitability of encapsulated Paraffin Wax on a small scale in a low temperature thermal energy storage system using COMSOL *** absorption and heating dynamics were analysed for different inlet designs and velocities,and the thermal gradient was evaluated across the tank geometry in a number of charging *** show that paraffin wax proves to be a good storage medium based on its fast charging and good latent heat *** study found that although an addition of a second inlet to the system yields higher final temperatures and improves the heat transfer rate,it does so minimally and therefore is not notably *** designs follow the same heating dynamics independently on the final ***,higher or lower velocities benefit the system based on the design.

关键词： thermal energy phase

Spreading and Wetting Behaviour of Trisiloxanes

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Journal of Bionic Engineering 2009年第4期6卷 341-349页

作者： jovana Radulovic Khellil Sefiane Martin E.R.Shanahan Institute for Materials and Processes School of EngineeringThe University of EdinburghEH9 3JLUK Universite Bordeaux I Laboratoire de Mecanique PhysiqueF-33405 Talence CedexFrance

Wetting and spreading processes which involve surfactant solutions are widely used in numerous industrial and practical applications *** performance of different non-ionic surfactants may vary significantly and so far superspreader solutions show the most promising spreading *** addition of trisiloxane surfactants to water was proven to enhance wetting,even on hydrophobic surfaces,on which conventional surfactants seem to have little or no *** these extraordinary surfactants have been extensively studied over recent years,complete understanding of their underlying mechanisms and a suitable mathematical model are still *** we present a possible explanation for the impressive performance of trisiloxane,which is compared to wetting enhancement of a conventional ***,we will explain why the hydrophobicity of the surface is a crucial factor for the spreading *** will be also shed on the effect of the pH of the solution to which surfactants are ***,we will investigate long-term effects of the water environment on trisiloxane wetting ability and discuss if ageing may significantly affect their performance.

关键词： hydrophobicity superspreading surfactants wetting

Computational Analysis of Position-dependent Disorder Content in DisProt Database

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Genomics, Proteomics & Bioinformatics 2012年第3期10卷 158-165页

作者： jovana J.Kovaevi Faculty of Mathematics University of BelgradeBelgrade 11001Serbia

A bioinformatics analysis of disorder content of proteins from the DisProt database has been performed with respect to position of dis- ordered residues. Each protein chain was divided into three parts： N- and C- terminal parts with each containing 30 amino acid （AA） residues and the middle region containing the remaining AA residues. The results show that in terminal parts, the percentage of disor- dered AA residues is higher than that of all AA residues （17% of disordered AA residues and 11% of all）. We analyzed the percentage of disorder for each of 20 AA residues in the three parts of proteins with respect to their hydropathy and molecular weight. For each AA, the percentage of disorder in the middle part is lower than that in terminal parts which is comparable at the two termini. A new scale of AAs has been introduced according to their disorder content in the middle part of proteins： CIFWMLYHRNVTAGQDSKEP. All big hydrophobic AAs are less frequently disordered, while almost all small hydrophilic AAs are more frequently disordered. The results obtained may be useful for construction and improving predictors for protein disorder.

关键词： Intrinsically unstructured/disordered proteins Unstructured/disordered regions DisProt database

Assessment of oxide nanoparticle stability in liquid phase transmission electron microscopy

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Nano Research 2019年第9期12卷 2355-2363页

作者： Mark J. Meijerink Krijn P. de Jong jovana Zecevic Inorganic Chemistry and Catalysis Debye Institute of Nanomaterials ScienceUtrecht UniversityUniversiteitsweg 993584 CG UtrechtThe Netherlands

Studying liquid phase nanoscale dynamic processes of oxide nanoparticles is of considerable interest to a wide variety of *** developed liquid phase transmission electron microscopy(LP-TEM)is a promising technique,but destabilization of oxides by solid-liquid?electron interactions remains an important *** this work we present a methodology to assess LP-TEM oxide stability in an aqueous phase,by subjecti ng several oxides of tech no logical importa nee to a controlled electr on dose in *** show a correlati on based on the Gibbs free en ergy of oxide hydrati on that can be used to assess the stability of oxides and dem on strate the existenee of several remarkably stable oxides,with no observable structural changes after one hour of electron beam irradiation in *** such destabilization phenomena combined with the identification of stable oxides allows for designing LP-TEM experiments free from adverse beam effects and thus in vestigati ons of numerous releva ntnano scale processes in water.

关键词： liquid phase transmission electron microscopy(LP-TEM) transmission electron microscopy electron beam damage metal oxide nano materials oxide stability

VR-based digital twin for remote monitoring of mining equipment:Architecture and a case study

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虚拟现实与智能硬件（中英文） 2024年第2期6卷 100-112页

作者： jovana PLAVŠIĆ Ilija MIŠKOVIĆNorman BKeevil Norman B.Keevil Institute of Mining Engineering University of British ColumbiaVancouverBC V6T 1Z4Canada

Background Traditional methods for monitoring mining equipment rely primarily on visual inspections,which are time-consuming,inefficient,and *** article introduces a novel approach to monitoring mission-critical systems and services in the mining industry by integrating virtual reality(VR)and digital twin(DT)***-based DTs enable remote equipment monitoring,advanced analysis of machine health,enhanced visualization,and improved decision *** This article presents an architecture for VR-based DT development,including the developmental stages,activities,and stakeholders involved.A case study on the condition monitoring of a conveyor belt using real-time synthetic vibration sensor data was conducted using the proposed *** study demonstrated the application of the methodology in remote monitoring and identified the need for further development for implementation in active mining *** article also discusses interdisciplinarity,choice of tools,computational resources,time and cost,human involvement,user acceptance,frequency of inspection,multiuser environment,potential risks,and applications beyond the mining *** The findings of this study provide a foundation for future research in the domain of VR-based DTs for remote equipment monitoring and a novel application area for VR in mining.

关键词： Virtual reality Digital twin Condition monitoring Mining equipment

Complementary and alternative medicine in European countries legislative framework

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Traditional Medicine Research 2020年第3期5卷 125-135页

作者： jovana Milenkovic Sergey Bolevich Gvozden Rosic Department of Dentistry Faculty of Medical SciencesUniversity of KragujevacKragujevac 34000Serbia Department of Human Pathology I.M.Sechenov First Moscow State Medical University(Sechenov University)Moscow 119991Russia Department of Physiology Faculty of Medical SciencesUniversity of KragujevacKragujevac 34000Serbia

Complementary and alternative medicine(CAM)is a set of different diagnostic and therapeutic procedures,as well as the use of natural products for the treatment of patients,derived from previously known traditional methods and enriched with modern scientific *** present article reviews the available data regarding the use of CAM and the legislation behind it in European *** use of CAM is recorded in Europe as a whole and varies between 1070%of the population of individual European *** least 300,000 registered CAM providers have been identified in the European Union(EU),of which slightly more than half includes non-medical *** most practiced discipline is acupuncture,followed by *** regulation and legislation in Europe is not precisely defined and is constantly striving to find a common *** legal frameworks for CAM are not defined,each European country has its own regulations and *** order to define universal legislation for CAM,the EU created the CAMbrella project,a project of the EU designed to find a unique system that would include the treatment of CAM in *** to the data from CAMbrella,from 39 countries in the EU,17 have general CAM *** status of CAM in Europe is characterized by enormous heterogeneity in all aspects,including terminology,methods,prevalence and ultimately,legal status,regulations and legislation.

关键词： Complementary and alternative medicine European countries Methods of therapy Legal status Regulation Legislation

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