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Epiphytic lichens in the town of Zvečan and their bioindicatior S value 兹维安镇附生地衣及其生物指示价值
The University Thought - Publication in Natural Sciences Pub Date : 2019-01-01 DOI: 10.5937/UNIVTHO9-19606
G. Aleksić, S. Stamenković, S. Ristić, M. Marković
{"title":"Epiphytic lichens in the town of Zvečan and their bioindicatior S value","authors":"G. Aleksić, S. Stamenković, S. Ristić, M. Marković","doi":"10.5937/UNIVTHO9-19606","DOIUrl":"https://doi.org/10.5937/UNIVTHO9-19606","url":null,"abstract":"This paper treats the long-term changes in area of the \"lichen desert\" of town Zvečan. Comparison of results obtained in 1926, when 67 lichen species where present, through the results in 1983 and 1988 when the \"lichen desert\", low or no lichen diversity was established because of the air pollution, with investigations carried out in 2014, 16 lichen species were identified. The \"lichen desert\" is no existing any more. The main reason that the lichens are present now is termination of operation of the \"Trepča\" company and cessation primary pollutants emissions. Using lichens as a bioindicators in this investigation it was established the average air pollution, which is lichen \"struggle zone\",meaning increase air quality.","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"67 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76595133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The ventral cranial size and shape variation between males and females of European brown frogs: Rana dalmatina, R. graeca and R. temporaria (Anura, Amphibia) 欧洲棕蛙雄性和雌性的腹侧颅骨大小和形状差异:斑点蛙、灰蛙和临时蛙(两栖纲无尾目)
The University Thought - Publication in Natural Sciences Pub Date : 2019-01-01 DOI: 10.5937/UNIVTHO9-21223
Jelena Krstičić-Račković, Nataša Tomašević-Kolarov, T. Vukov
{"title":"The ventral cranial size and shape variation between males and females of European brown frogs: Rana dalmatina, R. graeca and R. temporaria (Anura, Amphibia)","authors":"Jelena Krstičić-Račković, Nataša Tomašević-Kolarov, T. Vukov","doi":"10.5937/UNIVTHO9-21223","DOIUrl":"https://doi.org/10.5937/UNIVTHO9-21223","url":null,"abstract":"Sexual size and shape dimorphism is a very common phenomenon widely studied in the field of evolutionary biology. The differences between sexes are related to their life strategies and driven by the two evolutionary processes, sexual and natural selection. In amphibians, females are larger sex due to high correlation with fecundity, while dimorphism in body shape is often related to intrasexual competition for opposite sex during the breeding season. The main aim of this study is to describe patterns of ventral cranial size and shape variation between males and females of three species of European brown frogs, Rana dalmatina, R. graeca, R. temporaria, from the Balkan Peninsula. Our results showed that species R. dalmatina and R. graeca are sexually dimorphic for the ventral cranial size while species R. graeca and R. temporaria for the ventral cranial shape. Sexual dimorphism in cranial size is most probably an indirect consequence of natural selection favoring larger body for higher fecundity in explosive breeders like brown frogs. Cranial shape variation is under a strong influence of size variation but without allometric scaling between sexes. Sexual shape differences of analyzed brown frog species were most pronounced in the level of connection between cranium and jaw which indicate that differential diet of males and females can be a factor affecting observed sexual dimorphism patterns. More detailed studies of males and females microhabitats are necessary to conclude if differences in intersexual ecology affect intersexual size and shape differences in the cranium.","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"70 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73835988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Bacterial load in relation to physico-chemical parameters and faecal indicators of drinking water source 饮用水源理化参数及粪便指标与细菌负荷的关系
The University Thought - Publication in Natural Sciences Pub Date : 2019-01-01 DOI: 10.5937/UNIVTHO9-15602
S. Ćirić, D. Prodanović, B. Milosevic, M. Prodanović
{"title":"Bacterial load in relation to physico-chemical parameters and faecal indicators of drinking water source","authors":"S. Ćirić, D. Prodanović, B. Milosevic, M. Prodanović","doi":"10.5937/UNIVTHO9-15602","DOIUrl":"https://doi.org/10.5937/UNIVTHO9-15602","url":null,"abstract":"The aim of this study was to examine the relationship between bacterioplankton and physico-chemical parameters of water that serves as a source of drinking water as well as the relationship between bacterioplankton and the indicators of faecal contamination of water. Bacterioplankton abundance was determined by the cultivation method which included the inoculation of water samples on PCA and R2A media and incubation at 20 °C for 7 days. Total bacterial count was determined by epifluorescence microscopy, and three bacterial morphotypes were distinguished: rods, cocci and curved forms. Bacterial biomass was also determined. Eleven physico-chemical parameters of water were determined: temperature, pH, turbidity, conductivity, UV extinction, KMnO4 consumption, total phosphorus, orthophosphates, ammonium-, nitriteand nitrate nitrogen. As indicators of faecal contamination, the counts of total coliforms, faecal coliforms, faecal streptococci and sulphite-reducing clostridia were determined. Although there were significantly higher number of bacteria on R2A medium in relation to PCA medium, both media showed significant negative correlation of aerobic mesophilic bacteria with water temperature, in all seasons, and significant positive correlation with UV extinction, turbidity, KMnO4 consumption, total phosphorus, orthophosphates, ammonium nitrogen and nitrate nitrogen. Also, these bacteria showed significant positive correlation with total bacterial count and bacterial biomass, as well as bacterial indicators of faecal contamination.","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84459814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Isomorphic transformation and its application to the modulo (2n + 1) channel for RNS based FIR filter design 同构变换及其在基于RNS的模(2n + 1)通道FIR滤波器设计中的应用
The University Thought - Publication in Natural Sciences Pub Date : 2019-01-01 DOI: 10.5937/univtho9-21821
N. Stamenkovic
{"title":"Isomorphic transformation and its application to the modulo (2n + 1) channel for RNS based FIR filter design","authors":"N. Stamenkovic","doi":"10.5937/univtho9-21821","DOIUrl":"https://doi.org/10.5937/univtho9-21821","url":null,"abstract":"In this paper, the implementation of a Finite Impulse Response (FIR) filter in the Residue Number System (RNS), is presented, in which a modulo multiplier based on the isomorphism technique is used to perform multiplication in the ( 2 n + 1 ) channel. An RNS modular multiplication in the Galois Field GF ( 2 n + 1 ) is presented in detail in this paper. The multiplication is based on the isomorphic mapping technique adapted to the residue arithmetic. The isomorphic encoder and decoder look-up tables in the GF ( 2 8 + 1 ) are given. An architecture for FIR filter design based on distributed arithmetic for multiplication and accumulation in mentioned ( 2 n + 1 ) channel is also presented. This architecture is discussed in details and compared with with architecture based on isomorphing technique.","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83494906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Characterization of new synthesized Fe2O3 nanoparticles and their application as detection signal amplifiers in herbicide bentazone electroanalytical determination 新型合成Fe2O3纳米颗粒的表征及其在除草剂苯达酮电分析中检测信号放大器的应用
The University Thought - Publication in Natural Sciences Pub Date : 2019-01-01 DOI: 10.5937/UNIVTHO9-19359
A. Jokić, Branka Petković, Sonja Jevtić, V. Vasić, B. Laban
{"title":"Characterization of new synthesized Fe2O3 nanoparticles and their application as detection signal amplifiers in herbicide bentazone electroanalytical determination","authors":"A. Jokić, Branka Petković, Sonja Jevtić, V. Vasić, B. Laban","doi":"10.5937/UNIVTHO9-19359","DOIUrl":"https://doi.org/10.5937/UNIVTHO9-19359","url":null,"abstract":"The iron oxide nanoparticles (Fe2O3 NPs) were synthesized from two different iron salts by solid-state synthesis method. The synthesized powder of Fe2O3 NPs is soluble in water, and the colloidal dispersion was characterized by TEM, FTIR, UV-Vis spectroscopy and zeta potential measurements. Obtained NPs are spherical in shape with narrow particle size distribution and an average diameter of 3 nm. Further, the possible application of Fe2O3 NPs was proposed, due to significant electroanalytical signal amplification in the determination of herbicide bentazone in natural river water.","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87228865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Compression set and damping properties of oil-extended elastomers for sealants production 密封胶生产用增油弹性体的压缩凝结和阻尼性能
The University Thought - Publication in Natural Sciences Pub Date : 2019-01-01 DOI: 10.5937/UNIVTHO9-18802
V. Jovanović, J. Budinski-Simendic, Ljiljana Koruguc-Karasz, A. Aroguz, J. Milić, N. Vukić, G. Marković, P. Dugic
{"title":"Compression set and damping properties of oil-extended elastomers for sealants production","authors":"V. Jovanović, J. Budinski-Simendic, Ljiljana Koruguc-Karasz, A. Aroguz, J. Milić, N. Vukić, G. Marković, P. Dugic","doi":"10.5937/UNIVTHO9-18802","DOIUrl":"https://doi.org/10.5937/UNIVTHO9-18802","url":null,"abstract":"Damping materials have been widely used in the vibration and noise control to reduce their harmful consequences in different areas such as their application in the drilling equipment, aerospace and naval vessels, transportation vehicles, bridges and high buildings. Because of severe environmental standards, the oil fabrication is developing synthetic environmentally friendly drilling fluids. For a vehicle, applications are produced: the outer and inner beltline seals and the glass run channel. The compression set is the important characteristic of elastomeric sealing materials as spontaneous stress release during applica tion due to the internal pressure or external forces variations. The temperatureand frequency-insensitive damping are of significance for industrial uses. Elastomeric hybrid materials based on terpolymers as network precursor are very common for sealants fabrication. The focus of this work was to prepare oil-extended elastomeric hybrid materials based on ethylenepropylene-diene monomer rubber (EPDM), ground calcium carbonate and furnace nano carbon black. Cure characteristics were carried out on oscillating disc rheometer. The crosslinking of rubber compounds was performed in a molding press. The compression set was assessed using the standard procedure. The morphology of the cryogenically fractured surface of samples with different content of paraffin oil was characterized by scanning electron microscopy (SEM). Mechanical properties and hardness were analyzed before and after the aging of obtained samples. Damping properties of prepared materialswere determined using bending mode. The loss tangent, tan δ, was used as a measure of vibration energy dissipation.","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"54 73 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82411488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Novel 4-ferrocenyl-8-(phenylthio)-1,2,3,4-tetrahydroquinoline: Design, synthesis and spectral characterization 新型4-二茂铁-8-(苯基硫代)-1,2,3,4-四氢喹啉:设计、合成及光谱表征
The University Thought - Publication in Natural Sciences Pub Date : 2019-01-01 DOI: 10.5937/UNIVTHO9-20839
A. Minić, J. Bugarinović, M. Pešić, D. Ilić-Komatina
{"title":"Novel 4-ferrocenyl-8-(phenylthio)-1,2,3,4-tetrahydroquinoline: Design, synthesis and spectral characterization","authors":"A. Minić, J. Bugarinović, M. Pešić, D. Ilić-Komatina","doi":"10.5937/UNIVTHO9-20839","DOIUrl":"https://doi.org/10.5937/UNIVTHO9-20839","url":null,"abstract":"Herein, we report design, synthesis and spectral characterization of novel 4-ferrocenyl-8-(phenylthio)-1,2,3,4tetrahydroquinoline. Desired synthesis was achieved in three reaction steps, with a good overall yield (67%). First step included aza-Michael addition of 2-(phenylthio)aniline to 1-ferrocenylpropenone, subsequently, the obtained ketone was smoothly reduced to the corresponding 1,3-amino alcohol. The final step was an intramolecular cyclization prompted by acetic acid, proceeding via corresponding α-ferrocenyl carbocation. The synthesized compounds have been isolated pure, and their structure have been undoubtedly confirmed by standard spectral techniques (H NMR, C NMR, IR and elemental analyses).","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89117062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Elements of bioclimatological characteristics of Vranjska spa Vranjska温泉生物气候学特征要素
The University Thought - Publication in Natural Sciences Pub Date : 2019-01-01 DOI: 10.5937/UNIVTHO9-22125
V. Stevanović
{"title":"Elements of bioclimatological characteristics of Vranjska spa","authors":"V. Stevanović","doi":"10.5937/UNIVTHO9-22125","DOIUrl":"https://doi.org/10.5937/UNIVTHO9-22125","url":null,"abstract":"Bio-climatological analysis of Vranjska spa, based upon the equivalent temperatures (Teq) and Charles method (vapor weight), along with anthropo-climatic classification of Kruger, updated and adjusted, served as means of determining bio-climatological characteristics. Equivalent temperatures have been calculated for the period between 1985 and 2005, for the meteorological station Vranje, placed into six bio-climatological classes and three weather types. Representative weather types are cold (5.0 °C < Теq < 22.0 °C), agreeable (22.0 °C < Теq < 50.0 °C) and overheated (50.0 °C < Теq < 70.0 °C) with following classes: cold, algid, cool, agreeable, warm, humid and sultry.","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83520530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
TREND ASSESSING USING MANN-KENDALL’S TEST FOR PRIŠTINA METEOROLOGICAL STATION TEMPERATURE AND PRECIPITATION DATA, KOSOVO AND METOHIJA, SERBIA 塞尔维亚科索沃和梅托希亚普里什蒂纳气象站温度和降水数据的MANN-KENDALL检验趋势评估
The University Thought - Publication in Natural Sciences Pub Date : 2018-11-22 DOI: 10.5937/UNIVTHO8-19513
Nikola R. Bačević, M. Pavlović, Ilhana Rasljanin
{"title":"TREND ASSESSING USING MANN-KENDALL’S TEST FOR PRIŠTINA METEOROLOGICAL STATION TEMPERATURE AND PRECIPITATION DATA, KOSOVO AND METOHIJA, SERBIA","authors":"Nikola R. Bačević, M. Pavlović, Ilhana Rasljanin","doi":"10.5937/UNIVTHO8-19513","DOIUrl":"https://doi.org/10.5937/UNIVTHO8-19513","url":null,"abstract":"The study includes statistical analysis of Pristina meteorological station data on temperature and precipitation trends. The data are organized into four time series: average annual air temperatures (Ta), average maximal annual air temperatures (Tamax), average minimal annual air temperatures (Таmin), as well as annual precipitation sums (RRsum), all in the period 1949 – 1999. The Mann-Kendallʹs (MK) trend test analysis of the corresponding hypotheses discloses that the H 0 hypothesis should be accepted.  The general conclusion is that there is no trend neither in maximal, minimal, average temperatures, nor in average annual precipitation for the 1949 – 1999 period for the central Kosovo and Metohija (K&M).","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"8 1","pages":"39-43"},"PeriodicalIF":0.0,"publicationDate":"2018-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48654728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
SIMULATION OF CHEMICAL ACCIDENTS WITH ACETYLENE IN „MESSER TEHNOGAS“ KRALJEVO PLANT BY „ALOHA“ SOFTWARE PROGRAM 利用“aloha”软件对克拉列沃“messer tenogas”工厂乙炔化学事故进行了模拟
The University Thought - Publication in Natural Sciences Pub Date : 2018-10-10 DOI: 10.5937/UNIVTHO8-18014
D. Ilić-Komatina, Jovana Galjak, Svetlana Belošević
{"title":"SIMULATION OF CHEMICAL ACCIDENTS WITH ACETYLENE IN „MESSER TEHNOGAS“ KRALJEVO PLANT BY „ALOHA“ SOFTWARE PROGRAM","authors":"D. Ilić-Komatina, Jovana Galjak, Svetlana Belošević","doi":"10.5937/UNIVTHO8-18014","DOIUrl":"https://doi.org/10.5937/UNIVTHO8-18014","url":null,"abstract":"Chemical plants are generally associated with potentially high risk of chemical accidents. During chemical accidents hazardous substances jeopardize human lives, destroy material assests and degrade natural environment. The release of flammable and explosive gases or liquids especially poses a significant threat to the environment. This paper introduces the simulation of a chemical accident caused by an uncontrolled acetylene cylinder release in the warehouse of Messer Tehnogas Kraljevo chemical plant. The simulation was performed by ALOHA program package which defines a possible accident development and determines threat and safety zones. The assessment of potential scenarios is based on physico-chemical properties of the substance causing the accident. This paper discusses accident situations occurring under the most unfavorable atmospheric conditions.","PeriodicalId":22896,"journal":{"name":"The University Thought - Publication in Natural Sciences","volume":"8 1","pages":"19-26"},"PeriodicalIF":0.0,"publicationDate":"2018-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48884158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
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