Herein, an NMR spectral analysis was performed of a mixture of diastereomeric acetals synthesized from 2-fluorobenzaldehyde and a racemic mixture of 4-methylpentan-2-ol. The simulated 1H- and 13C-NMR spectra of individual diastereomers, as well as their superimposed and summed spectra, were compared with the obtained experimental spectra. Spin simulation of proton signals was particularly useful for the assignment of the aromatic part of the molecules and of the diastereotopic protons of the methylene groups. The isomer NMR spectral data - chemical shifts, coupling constants, HMBC and NOESY interactions were systematized in appropriate tables and schemes.
{"title":"Assignment of 1H and 13C NMR spectral data of diastereomeric acetals directly from their mixture by spectral simulation","authors":"Milan Nešić, N. Radulović","doi":"10.2298/fupct2102069n","DOIUrl":"https://doi.org/10.2298/fupct2102069n","url":null,"abstract":"Herein, an NMR spectral analysis was performed of a mixture of diastereomeric acetals synthesized from 2-fluorobenzaldehyde and a racemic mixture of 4-methylpentan-2-ol. The simulated 1H- and 13C-NMR spectra of individual diastereomers, as well as their superimposed and summed spectra, were compared with the obtained experimental spectra. Spin simulation of proton signals was particularly useful for the assignment of the aromatic part of the molecules and of the diastereotopic protons of the methylene groups. The isomer NMR spectral data - chemical shifts, coupling constants, HMBC and NOESY interactions were systematized in appropriate tables and schemes.","PeriodicalId":12248,"journal":{"name":"Facta Universitatis - Series: Physics, Chemistry and Technology","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81840850","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}
M. Miljkovic, Vojkan Miljković, D. Trajković, S. Konstantinović
In this paper, the influence of the fluorescent bleaching agent, UVITEX BHT optical bleach, on the degree of whiteness of cotton fabric was examined. In the first phase of the test, the bleaching of cotton with hydrogen peroxide, as the bleaching agent, was done. In the second phase, the effect of fluorescent bleaching agent on the whiteness of cotton wool bleached in the first phase was tested. Moreover, the color strength (K/S) and CIE L*a*b* were determined using Coloreye - 3000 spectrophotometer. The whiteness degree achieved with bleaching agent UVITEX BHT was almost twice larger than the one achieved with chemical bleaching compounds. The highest whiteness index (WI) of cotton fabrics was achieved when fluorescent UVITEX BHT bleach was used in the concentration of 0.1%.
{"title":"Degree of cotton fabric whiteness obtained by the fluorescent bleaching agent UVITEX BHT and H2O2","authors":"M. Miljkovic, Vojkan Miljković, D. Trajković, S. Konstantinović","doi":"10.2298/FUPCT2001057M","DOIUrl":"https://doi.org/10.2298/FUPCT2001057M","url":null,"abstract":"In this paper, the influence of the fluorescent bleaching agent, UVITEX BHT optical bleach, on the degree of whiteness of cotton fabric was examined. In the first phase of the test, the bleaching of cotton with hydrogen peroxide, as the bleaching agent, was done. In the second phase, the effect of fluorescent bleaching agent on the whiteness of cotton wool bleached in the first phase was tested. Moreover, the color strength (K/S) and CIE L*a*b* were determined using Coloreye - 3000 spectrophotometer. The whiteness degree achieved with bleaching agent UVITEX BHT was almost twice larger than the one achieved with chemical bleaching compounds. The highest whiteness index (WI) of cotton fabrics was achieved when fluorescent UVITEX BHT bleach was used in the concentration of 0.1%.","PeriodicalId":12248,"journal":{"name":"Facta Universitatis - Series: Physics, Chemistry and Technology","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89077926","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}
M Ivana Stanojevic, Jelena Gitarić, P. Asanin, Biljana Glisic Dj., S. Drašković, P. Zivkovic, P. T. Vasic
New solid solution containing Mg(II) and Cu(II) complexes with hexadentate 1,3-propanediamine-N,N,N?,N?-tetraacetate ligand (1,3-pdta), [Mg(H2O)6] [Mg0.5Cu0.5(1,3-pdta)].2H2O was synthesized and structurally characterized by elemental microanalyses, molar conductivity, and spectroscopic (IR and UV-Vis) measurements. The spectroscopic data of [Mg(H2O)6][Mg0.5Cu0.5(1,3-pdta)].2H2O were compared with those for [Mg(H2O)6][Cu(1,3-pdta)].2H2O complex of the known molecular structure determined by single-crystal X-ray diffraction analysis. In vitro growth inhibition activity of [Mg(H2O)6][Mg0.5Cu0.5(1,3-pdta)].2H2O and [Mg(H2O)6][Cu(1,3-pdta)].2H2O against Colletotrichum acutatum and their effects on this fungus sporulation level are investigated. The obtained results showed that the highest percentage of inhibition for mycelium growth was achieved at a concentration of 500 ?g/mL for the investigated complexes. The biological activities of the investigated complexes were compared with those for the commercial formulation of fungicide captan (Method 480 SC).
{"title":"Synthesis and spectroscopic characterization of new solid solution containing Mg(II) and Cu(II) complexes with hexadentate 1,3-propanediaminen, N,N’,N’-tetraacetate (1,3-pdta) ligand: In vitro antifungal activity of 1,3-pdta-Cu(II) complexes","authors":"M Ivana Stanojevic, Jelena Gitarić, P. Asanin, Biljana Glisic Dj., S. Drašković, P. Zivkovic, P. T. Vasic","doi":"10.2298/FUPCT2001047S","DOIUrl":"https://doi.org/10.2298/FUPCT2001047S","url":null,"abstract":"New solid solution containing Mg(II) and Cu(II) complexes with hexadentate 1,3-propanediamine-N,N,N?,N?-tetraacetate ligand (1,3-pdta), [Mg(H2O)6] [Mg0.5Cu0.5(1,3-pdta)].2H2O was synthesized and structurally characterized by elemental microanalyses, molar conductivity, and spectroscopic (IR and UV-Vis) measurements. The spectroscopic data of [Mg(H2O)6][Mg0.5Cu0.5(1,3-pdta)].2H2O were compared with those for [Mg(H2O)6][Cu(1,3-pdta)].2H2O complex of the known molecular structure determined by single-crystal X-ray diffraction analysis. In vitro growth inhibition activity of [Mg(H2O)6][Mg0.5Cu0.5(1,3-pdta)].2H2O and [Mg(H2O)6][Cu(1,3-pdta)].2H2O against Colletotrichum acutatum and their effects on this fungus sporulation level are investigated. The obtained results showed that the highest percentage of inhibition for mycelium growth was achieved at a concentration of 500 ?g/mL for the investigated complexes. The biological activities of the investigated complexes were compared with those for the commercial formulation of fungicide captan (Method 480 SC).","PeriodicalId":12248,"journal":{"name":"Facta Universitatis - Series: Physics, Chemistry and Technology","volume":"2014 1","pages":"47-56"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88199182","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}
Ramaria aurea (Schaeff) Qu?l., known as the golden coral, is an edible mushroom with a worldwide distribution, but there are scarce data on its chemical composition. Free fatty acids (FAs) from this fungal species have never been analyzed before, although it is known that FAs are linked with key physiological and biochemical processes, and thus, they essential for the proper functioning of various ecosystems. Moreover, there are no literature data on the chemical composition of R. aurea from Serbia. Herein, we report on the GC-MS characterization of a diethyl-ether extract of R. aurea fruit bodies collected in the region of Mt. Mali Jastrebac (central Serbia), with the focus on the free FAs profile, investigated using a method of FA derivatization by diazomethane. The GC-MS analysis enabled the identification of around 60 components, among which more than a half were methyl esters of saturated and unsaturated FAs, comprising 88% of the total extract. The rather diverse and complex free FA profile of R. aurea was dominated by monounsaturated FAs (ca. 35% of the total extract) with oleic acid as the most abundant constituent (ca. 34%). Polyunsaturated and saturated FAs were present in almost equal amounts, ca. 26% and 24%, respectively. The major polyunsaturated FA was linoleic (ca. 26%), while the principal saturated FA was palmitic acid (ca. 15%). The content of total saturated and mono- and polyunsaturated FAs, as well their ratio, could be used as an indicator of the potential nutritional and medicinal use of this mushroom.
{"title":"Free fatty acid composition of Ramaria aurea (Schaeff.) Quél.","authors":"A. Miltojević, I. Milovanović, N. Radulović","doi":"10.2298/FUPCT2002099M","DOIUrl":"https://doi.org/10.2298/FUPCT2002099M","url":null,"abstract":"Ramaria aurea (Schaeff) Qu?l., known as the golden coral, is an edible mushroom with a worldwide distribution, but there are scarce data on its chemical composition. Free fatty acids (FAs) from this fungal species have never been analyzed before, although it is known that FAs are linked with key physiological and biochemical processes, and thus, they essential for the proper functioning of various ecosystems. Moreover, there are no literature data on the chemical composition of R. aurea from Serbia. Herein, we report on the GC-MS characterization of a diethyl-ether extract of R. aurea fruit bodies collected in the region of Mt. Mali Jastrebac (central Serbia), with the focus on the free FAs profile, investigated using a method of FA derivatization by diazomethane. The GC-MS analysis enabled the identification of around 60 components, among which more than a half were methyl esters of saturated and unsaturated FAs, comprising 88% of the total extract. The rather diverse and complex free FA profile of R. aurea was dominated by monounsaturated FAs (ca. 35% of the total extract) with oleic acid as the most abundant constituent (ca. 34%). Polyunsaturated and saturated FAs were present in almost equal amounts, ca. 26% and 24%, respectively. The major polyunsaturated FA was linoleic (ca. 26%), while the principal saturated FA was palmitic acid (ca. 15%). The content of total saturated and mono- and polyunsaturated FAs, as well their ratio, could be used as an indicator of the potential nutritional and medicinal use of this mushroom.","PeriodicalId":12248,"journal":{"name":"Facta Universitatis - Series: Physics, Chemistry and Technology","volume":"56 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79099115","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}
D. Dimitrijevic, G. Djordjevic, M. Milošević, Marko Stojanovic
We study a model of tachyon inflation and its attractor solution in the framework of holographic cosmology. The model is based on a holographic braneworld scenario with a D3-brane located at the holographic boundary of an asymptotic ADS5 bulk. The tachyon field that drives inflation is represented by a Dirac-Born-Infeld (DBI) action on the brane. We examine the attractor trajectory in the phase space of the tachyon field for the case of inverse cosine hyperbolic tachyon potential.
{"title":"Attractor behaviour of holographic inflation model for inverse cosine hyperbolic potential","authors":"D. Dimitrijevic, G. Djordjevic, M. Milošević, Marko Stojanovic","doi":"10.2298/FUPCT2001065D","DOIUrl":"https://doi.org/10.2298/FUPCT2001065D","url":null,"abstract":"We study a model of tachyon inflation and its attractor solution in the framework of holographic cosmology. The model is based on a holographic braneworld scenario with a D3-brane located at the holographic boundary of an asymptotic ADS5 bulk. The tachyon field that drives inflation is represented by a Dirac-Born-Infeld (DBI) action on the brane. We examine the attractor trajectory in the phase space of the tachyon field for the case of inverse cosine hyperbolic tachyon potential.","PeriodicalId":12248,"journal":{"name":"Facta Universitatis - Series: Physics, Chemistry and Technology","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79872842","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}
Glucosinolates are abundant in plants of the order Brassicales, and they are degraded by myrosinases into various organic breakdown products: isothiocyanates, thiocyanates, nitriles, etc., depending on their structure, conditions of hydrolysis, the presence of certain protein cofactors. Their most common hydrolysis products are isothiocyanates, while simple nitriles, epithionitriles, and thiocyanates are produced occasionally. Organic thiocyanates are described from a very limited number of Brassicales taxa. Up to now benzyl, (4-hydroxyphenyl)methyl, (4-methoxyphenyl)methyl, 4- methylthiobutyl, and allyl thiocyanates were reported as products of glucosinolates autolysis. The present review summarizes the knowledge on the mechanism of organic thiocyanate formation from the corresponding thioglucosides. The enzymatic formation of organic thiocyanates is believed to be enabled by thiocyanate-forming protein (TFP), but they could be formed via metabolic routes that do not involve TFP. All of the reported thiocyanates are produced from stable (carbo)cationic species that allow an isomerization of an isothiocyanate to thiocyanate, and vice versa. Although the possibility that thiocyanates can be biosynthesized in plats under certain conditions cannot be dismissed, allyl thiocyanate can be a thermal isomerization artefact of the original isothiocyanate that is formed in the heated zones of the gas chromatograph, while other thiocyanates could form in an aqueous medium via heterolytic dissociation to ambident nucleophilic SCN- and its recapture. One should always be aware of this analytical shortcoming when concluding on the presence and quantity of these specific (iso)thiocyanantes in the analyzed sample.
{"title":"Organic thiocyanates - glucosinolate enzymatic degradation products or artefacts of the isolation procedure?","authors":"Milica Todorovska-Rasic, N. Radulović","doi":"10.2298/FUPCT2002077T","DOIUrl":"https://doi.org/10.2298/FUPCT2002077T","url":null,"abstract":"Glucosinolates are abundant in plants of the order Brassicales, and they are degraded by myrosinases into various organic breakdown products: isothiocyanates, thiocyanates, nitriles, etc., depending on their structure, conditions of hydrolysis, the presence of certain protein cofactors. Their most common hydrolysis products are isothiocyanates, while simple nitriles, epithionitriles, and thiocyanates are produced occasionally. Organic thiocyanates are described from a very limited number of Brassicales taxa. Up to now benzyl, (4-hydroxyphenyl)methyl, (4-methoxyphenyl)methyl, 4- methylthiobutyl, and allyl thiocyanates were reported as products of glucosinolates autolysis. The present review summarizes the knowledge on the mechanism of organic thiocyanate formation from the corresponding thioglucosides. The enzymatic formation of organic thiocyanates is believed to be enabled by thiocyanate-forming protein (TFP), but they could be formed via metabolic routes that do not involve TFP. All of the reported thiocyanates are produced from stable (carbo)cationic species that allow an isomerization of an isothiocyanate to thiocyanate, and vice versa. Although the possibility that thiocyanates can be biosynthesized in plats under certain conditions cannot be dismissed, allyl thiocyanate can be a thermal isomerization artefact of the original isothiocyanate that is formed in the heated zones of the gas chromatograph, while other thiocyanates could form in an aqueous medium via heterolytic dissociation to ambident nucleophilic SCN- and its recapture. One should always be aware of this analytical shortcoming when concluding on the presence and quantity of these specific (iso)thiocyanantes in the analyzed sample.","PeriodicalId":12248,"journal":{"name":"Facta Universitatis - Series: Physics, Chemistry and Technology","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75288371","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}
Vojkan Miljković, Biljana Djordjevic, B. Arsić, M. Marković, L. Nikolić, Z. Todorović, G. Nikolić
This study aimed to provide information on the extraction yields, total phenols, total flavonoids, antioxidant activity, and qualitative-quantitative chemical composition of the extracts obtained from the dried fruit of Sambucus racemosa L. with conventional solvents (methanol, acetone, chloroform) and deep eutectic solvents (choline chloride urea and choline chloride glycerol). Solid-liquid extraction, Folin- Ciocalteu method, DPPH free radical scavenging, HPLC-UV/VIS were the methods used in this study. The highest extraction yield (18%) was obtained with ChCl:G as an extragent. The highest amount of total flavonoids was the content of this extract (12.3 mg QE/g d.e.). Extracts obtained with acetone and ChCl:U possess the highest amount of total phenol content (125.26 and 104.38 mg GAE/g d.e. respectively). All tested extracts showed free radical scavenging activity. Identified components of extracts are gallic acid, rutin, caftaric acid, caffeic acid, hyperoside, vitexin, and quercetin. Fruit extracts of S. racemosa are a rich source of phenols and flavonoids. The extracts obtained with DESs are more active in free radical scavenging than those obtained with conventional solvents, and possess qualitatively and quantitatively more components, apart from vitexin that was detected only in the methanol extract.
{"title":"Sambucus racemosa L. fruit extracts obtained with conventional and deep eutectic solvents","authors":"Vojkan Miljković, Biljana Djordjevic, B. Arsić, M. Marković, L. Nikolić, Z. Todorović, G. Nikolić","doi":"10.2298/FUPCT2002089M","DOIUrl":"https://doi.org/10.2298/FUPCT2002089M","url":null,"abstract":"This study aimed to provide information on the extraction yields, total phenols, total flavonoids, antioxidant activity, and qualitative-quantitative chemical composition of the extracts obtained from the dried fruit of Sambucus racemosa L. with conventional solvents (methanol, acetone, chloroform) and deep eutectic solvents (choline chloride urea and choline chloride glycerol). Solid-liquid extraction, Folin- Ciocalteu method, DPPH free radical scavenging, HPLC-UV/VIS were the methods used in this study. The highest extraction yield (18%) was obtained with ChCl:G as an extragent. The highest amount of total flavonoids was the content of this extract (12.3 mg QE/g d.e.). Extracts obtained with acetone and ChCl:U possess the highest amount of total phenol content (125.26 and 104.38 mg GAE/g d.e. respectively). All tested extracts showed free radical scavenging activity. Identified components of extracts are gallic acid, rutin, caftaric acid, caffeic acid, hyperoside, vitexin, and quercetin. Fruit extracts of S. racemosa are a rich source of phenols and flavonoids. The extracts obtained with DESs are more active in free radical scavenging than those obtained with conventional solvents, and possess qualitatively and quantitatively more components, apart from vitexin that was detected only in the methanol extract.","PeriodicalId":12248,"journal":{"name":"Facta Universitatis - Series: Physics, Chemistry and Technology","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81459064","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}
J. Aleksic, T. Barudžija, M. Mitrić, M. Bošković, Z. Ristić, Ljiljana Kostić
In this paper, we investigated YF3: Yb/Er, YF3: Yb/Tm, and YF3: Yb/Ho solid solutions prepared by reaction of an appropriate amount of oxides with ammonium difluoride (NH4HF2) as a fluorinating agent. These samples were characterized by Xray diffraction (XRD), magnetic measurements, and up-conversion (UC) photoluminescence spectra. The results show that all samples are single-phase and crystallize in an orthorhombic crystal structure of the ?-YF3 structure type. Above 100 K, the measured molar magnetic susceptibility was fitted by the Curie-Weiss law and the average effective magnetic moments for the observed samples were obtained. All the samples showed pure paramagnetic behavior. When doped with lanthanide elements (Yb/Er, Yb/Tm, Yb/Ho), YF3 solid solutions can emit characteristic green, red, blue, and near IR light under the excitation of a 980 nm laser diode.
{"title":"Structural, magnetic and up-conversion properties of YF3: Yb/Ln (Ln = Er, Tm, Ho) solid solutions","authors":"J. Aleksic, T. Barudžija, M. Mitrić, M. Bošković, Z. Ristić, Ljiljana Kostić","doi":"10.2298/FUPCT2002119A","DOIUrl":"https://doi.org/10.2298/FUPCT2002119A","url":null,"abstract":"In this paper, we investigated YF3: Yb/Er, YF3: Yb/Tm, and YF3: Yb/Ho solid solutions prepared by reaction of an appropriate amount of oxides with ammonium difluoride (NH4HF2) as a fluorinating agent. These samples were characterized by Xray diffraction (XRD), magnetic measurements, and up-conversion (UC) photoluminescence spectra. The results show that all samples are single-phase and crystallize in an orthorhombic crystal structure of the ?-YF3 structure type. Above 100 K, the measured molar magnetic susceptibility was fitted by the Curie-Weiss law and the average effective magnetic moments for the observed samples were obtained. All the samples showed pure paramagnetic behavior. When doped with lanthanide elements (Yb/Er, Yb/Tm, Yb/Ho), YF3 solid solutions can emit characteristic green, red, blue, and near IR light under the excitation of a 980 nm laser diode.","PeriodicalId":12248,"journal":{"name":"Facta Universitatis - Series: Physics, Chemistry and Technology","volume":"10 1","pages":"119-129"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86565570","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}
The prior versions of the three-body boundary-corrected first Born approximation (CB1-3B) and the three-body boundary-corrected continuum intermediate states method (BCIS-3B) are applied to calculate the state-selective and state-summed total cross sections for single-electron capture from hydrogen-like ion targets (He+, Li2+) by fast completely stripped projectiles (H+, He2+, Li3+). All calculations are carried out for single-electron capture into arbitrary n l m final states of the projectiles, up to n = 4. The contributions from higher n shells are included using the Oppenheimer n?3 scaling law. The present results are found to be in satisfactory agreement with the available experimental data.
应用三体边界修正的first Born近似(CB1-3B)和三体边界修正的连续介质中间态方法(BCIS-3B)计算了快速完全剥离弹丸(H+， He2+， Li3+)从类氢离子靶(He+， Li2+)捕获单电子的状态选择和状态求和总截面。所有的计算都是在单电子捕获到任意n l m的弹丸最终状态时进行的，直到n = 4。高n壳层的贡献用奥本海默n?3缩放定律。所得结果与已有的实验数据符合得很好。
{"title":"Single-electron capture in ion-ion collisions","authors":"D. Delibašić, N. Milojević, I. Mančev","doi":"10.2298/FUPCT2002131D","DOIUrl":"https://doi.org/10.2298/FUPCT2002131D","url":null,"abstract":"The prior versions of the three-body boundary-corrected first Born approximation (CB1-3B) and the three-body boundary-corrected continuum intermediate states method (BCIS-3B) are applied to calculate the state-selective and state-summed total cross sections for single-electron capture from hydrogen-like ion targets (He+, Li2+) by fast completely stripped projectiles (H+, He2+, Li3+). All calculations are carried out for single-electron capture into arbitrary n l m final states of the projectiles, up to n = 4. The contributions from higher n shells are included using the Oppenheimer n?3 scaling law. The present results are found to be in satisfactory agreement with the available experimental data.","PeriodicalId":12248,"journal":{"name":"Facta Universitatis - Series: Physics, Chemistry and Technology","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81421814","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}
The development of new experimental techniques, such as cryo-electron spectroscopy, enables insight into the structural features inside cells. However, in specific cases, it is still not possible to get the cryo images. Therefore, the development of the scores for the evaluation of the quality of the constructed RNAs, similarly to the proteins, is a prerequisite for the investigation of the diseases caused by the organisms not well investigated. Here, we are providing a summary of the evaluation scores in use for the prediction of the quality of the constructed 3D models of the RNAs.
{"title":"Evaluation of the constructed 3D models of RNAs: A review","authors":"B. Arsić, Boris Furtula, M. Randjelovic","doi":"10.2298/FUPCT2001039A","DOIUrl":"https://doi.org/10.2298/FUPCT2001039A","url":null,"abstract":"The development of new experimental techniques, such as cryo-electron spectroscopy, enables insight into the structural features inside cells. However, in specific cases, it is still not possible to get the cryo images. Therefore, the development of the scores for the evaluation of the quality of the constructed RNAs, similarly to the proteins, is a prerequisite for the investigation of the diseases caused by the organisms not well investigated. Here, we are providing a summary of the evaluation scores in use for the prediction of the quality of the constructed 3D models of the RNAs.","PeriodicalId":12248,"journal":{"name":"Facta Universitatis - Series: Physics, Chemistry and Technology","volume":"70 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84870143","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}
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