DüzlerçamıWildlife Reserve Area(WRA)is the last natural habitat of fallow deer(Dama dama)in the world.Fallow deer is native to Turkey,however,its geographical range is currently confined to Düzlerç...DüzlerçamıWildlife Reserve Area(WRA)is the last natural habitat of fallow deer(Dama dama)in the world.Fallow deer is native to Turkey,however,its geographical range is currently confined to DüzlerçamıWRA,Antalya.To date,a detailed habitat investigation of fallow deer dis-tribution has not been conducted.This study is vital for the last surviving populations of fallow deer in Turkey.There-fore,we studied the habitat suitability and utilization of fal-low deer in the DüzlerçamıWRA.Vegetation and wildlife inventory was surveyed across a total of 304 sample areas between 2015 and 2017.Plant species were recorded accord-ing to the Braun-Blanquet method and wildlife surveys were based on footprints,feces,and other signs of fallow deer.Classification and regression tree techniques,as well as MAXENT,were used to model vegetation and fallow deer habitat.Topographic position index,terrain ruggedness index,roughness index,elevation,and bedrock formation were also calculated and included in the models.Based on our results,we drafted a habitat protection map for fallow deer.To ensure sustainability of habitats where populations of fallow deer are found in Turkey,we developed recommen-dations such as closuring human access of the 1st-degree Protection Area and reintroduction of the species to other potential habitats.展开更多
The first multiband photometric solutions of the short-period V Gru eclipsing binary from the southern hemisphere are presented in this study.Light curves of the system were observed through BVI filters at the Congari...The first multiband photometric solutions of the short-period V Gru eclipsing binary from the southern hemisphere are presented in this study.Light curves of the system were observed through BVI filters at the Congarinni Observatory in Australia for 15 nights.In addition to the new ground-based data,we also used the TESS observations in two sectors.We analyzed the light curves of the system using the PHysics Of Eclipsing BinariEs(PHOEBE)2.4.7 version code to achieve the best accordance with the photometric observations.The solutions suggest that V Gru is a near-contact binary system with q=1.302(81)mass ratio,f_(1)=0.010(23),f_(2)=-0.0.009(21),and i=73.45(38).We considered the two hot spots on the hotter and cooler components for the light curve analysis.We extracted the minima times from the light curves based on the Markov Chain Monte Carlo(MCMC)approach.Using our new light curves,TESS,and additional literature minima,we computed the ephemeris of V Gru.The system’s eclipse timing variation trend was determined using the MCMC method.This system is a good and challenging case for future studies.展开更多
The light curve analyses and orbital period variations for two contact binary stars,LS Del and V997 Cyg,are presented in this work which was conducted in the frame of the Binary Systems of South and North project Grou...The light curve analyses and orbital period variations for two contact binary stars,LS Del and V997 Cyg,are presented in this work which was conducted in the frame of the Binary Systems of South and North project Ground-based photometric observations were performed at two observatories in France.We used the Transiting Exoplanet Survey Satellite(TESS)data for extracting times of minima and light curve analysis of the targe systems.The O-C diagram for both systems displays a parabolic trend.LS Del and V997 Cyg’s orbital periods are increasing at rates of dP/dt=7.20×10^(-08)days yr^(-1)and dP/dt=2.54×10^(-08)days yr^(-1),respectively Therefore,it can be concluded that mass is being transferred from the less massive star to the more massive component with a rate of dM/dt=-1.96×10^(-7)M_(⊙)yr^(-1)for the LS Del system,and dM/dt=-3.83×10^(-7)M_(⊙)yr-1for V997 Cyg.The parameters of a third possible object in the system are also considered.The PHysics Of Eclipsing BinariEs Python code was used to analyze the light curves.The light curve solutions needed a cold starspot due to the asymmetry in the LS Del system’s light curve maxima.The mass ratio fill-out factor,and star temperature all indicate that both systems are contact binary types in this investigation.Two methods were applied to estimate the absolute parameters of the systems:one method relied on the parallax of Gaia DR3,and the other used a P-M relationship.The positions of the systems are also depicted on the M-L,M-R q-L_(ratio),and logM_(tot)-logJ_(0)diagrams.We recommend that further observations and investigations be done on the existence of a fourth body in this system.展开更多
Due to the intense data flow in expanding Internet of Things(IoT)applications,a heavy processing cost and workload on the fog-cloud side become inevitable.One of the most critical challenges is optimal task scheduling...Due to the intense data flow in expanding Internet of Things(IoT)applications,a heavy processing cost and workload on the fog-cloud side become inevitable.One of the most critical challenges is optimal task scheduling.Since this is an NP-hard problem type,a metaheuristic approach can be a good option.This study introduces a novel enhancement to the Artificial Rabbits Optimization(ARO)algorithm by integrating Chaotic maps and Levy flight strategies(CLARO).This dual approach addresses the limitations of standard ARO in terms of population diversity and convergence speed.It is designed for task scheduling in fog-cloud environments,optimizing energy consumption,makespan,and execution time simultaneously three critical parameters often treated individually in prior works.Unlike conventional single-objective methods,the proposed approach incorporates a multi-objective fitness function that dynamically adjusts the weight of each parameter,resulting in better resource allocation and load balancing.In analysis,a real-world dataset,the Open-source Google Cloud Jobs Dataset(GoCJ_Dataset),is used for performance measurement,and analyses are performed on three considered parameters.Comparisons are applied with well-known algorithms:GWO,SCSO,PSO,WOA,and ARO to indicate the reliability of the proposed method.In this regard,performance evaluation is performed by assigning these tasks to Virtual Machines(VMs)in the resource pool.Simulations are performed on 90 base cases and 30 scenarios for each evaluation parameter.The results indicated that the proposed algorithm achieved the best makespan performance in 80% of cases,ranked first in execution time in 61%of cases,and performed best in the final parameter in 69% of cases.In addition,according to the obtained results based on the defined fitness function,the proposed method(CLARO)is 2.52%better than ARO,3.95%better than SCSO,5.06%better than GWO,8.15%better than PSO,and 9.41%better than WOA.展开更多
The first photometric solution in the B,V,R_(c) and I_(c) filters of the short period V1833 Ori eclipsing binary is presented based on new ground-based CCD photometric observations.We analyzed the BVRI photometric lig...The first photometric solution in the B,V,R_(c) and I_(c) filters of the short period V1833 Ori eclipsing binary is presented based on new ground-based CCD photometric observations.We analyzed the BVRI photometric light curves of the system,using PHOEBE 0.31 a,a binary star modeling program,with the Wilson-Devinney method based on Roche geometry to achieve the best accordance with the photometric observations to determine their absolute parameters from the light curves.We updated the ephemeris of V1833 Ori using two new light curve minima derived by our new observational data from those collected in the literature and analyzed the change of the system's orbital period.The O-C analysis indicates that the variations of the orbital period of V1833 Ori with time are increasing at a rate of 3.03×10^(-7)days yr^(-1).The distance of V1833 Ori is 173.7±15.6 pc.From the solutions,we find that V1833 Ori is an A-subtype W UMa overcontact binary with q=0.701 mass ratio and f=1.14 fill-out factor.The HR diagram positions of the eclipsing binary system's components are discussed.The system's absolute dimensions were compared to those of similar binaries in the log T_(eff)-log L,logM-logL,1 ogM-logR and logM-log J_(0)diagrams.展开更多
Lactic Acid Bacteria(LAB)from different niches can be responsible for the production of distinct exopolysaccharides(EPS)that might possess important structural and technological features.In this respect,the aim of thi...Lactic Acid Bacteria(LAB)from different niches can be responsible for the production of distinct exopolysaccharides(EPS)that might possess important structural and technological features.In this respect,the aim of this study was to isolate an EPS producer LAB strain from bee pollen environment.Leuconostoc mesenteroides BI-20 with a slimy-mucoid colony morphology was identified from bee pollen and the structural,technological and functional characteristics of EPS produced by this strain were determined.EPS BI-20 was a highly branched dextran containing 20%(1→3)-linked α-D-glucose branches determined by ^(1)H and ^(13)C NMR analysis.The presence of(1→6)/(1→3)-linkedα-D-glucose linkages in dextran BI-20 was also confirmed by FTIR analysis.Dextran BI-20,with a molecular weight of 1×10^(8) Da,possessed strong thermal properties,amorphous nature and highly branched and fibrous microstructural characteristics determined by DSC,TGA,XRD and SEM analysis,respectively.In terms of functional roles,dextran BI-20 demonstrated strong antioxidant capacity detected by ABTS and CUPRAC tests.Finally,no digestion was observed in dextran BI-20 under simulated gastric conditions.Results of this study unveiled techno-functional characteristics of dextran BI-20 produced by a bee pollen isolate LAB strain.展开更多
Scientific research involving nanotechnology has grown exponentially and has led to the development of engineered nanoparticles（NPs）.Silica NPs have been used in numerous scientific and technological applications ov...Scientific research involving nanotechnology has grown exponentially and has led to the development of engineered nanoparticles（NPs）.Silica NPs have been used in numerous scientific and technological applications over the past decade,necessitating the development of efficient methods for their synthesis.Recent studies have explored the potential of laser ablation as a convenient way to prepare metal and oxide NPs.Due to its high silica content,low cost,and widespread availability,sugarbeet bagasse is highly suitable as a raw material for producing silica NPs via laser ablation.In this study,two different NP production methods were investigated：laser ablation and NaOH treatment.We developed a novel,one-step method to produce silica NPs from sugarbeet bagasse using laser ablation,and we characterized the silica NPs using environmental scanning electron microscopy（ESEM）,energy dispersive spectrometry（EDS）,dynamic light scattering（DLS）,transmission electron microscopy（TEM）,attenuated total reflectanceFourier transform infrared spectroscopy（ATR-FT1R）,X-ray photoelectron spectroscopy（XPS） and Raman spectroscopy.EDS analysis and XPS confirmed the presence of silica NPs.The NPs produced by laser ablation were smaller（38-190 nm） than those produced by NaOH treatment（531-825 nm）.Finally,we demonstrated positive effects of silica NPs produced from laser ablation on the growth of microalgae,and thus,our novel method may be beneficial as an environmentally friendly procedure to produce NPs.展开更多
Objectives:The aim of this study is to investigate the electrochemical behavior of Sudan Ⅱ(Sull)using a screen-printed gold electrode(SPGE)modified with 1,4-dithiothreitol(DTT)and to determine the amount of Sudan II ...Objectives:The aim of this study is to investigate the electrochemical behavior of Sudan Ⅱ(Sull)using a screen-printed gold electrode(SPGE)modified with 1,4-dithiothreitol(DTT)and to determine the amount of Sudan II by voltammetry.Materials and Methods:A DTT-modified screen-printed gold electrode(DTT/SPGE)was fabricated and its application for differential pulse voltammetric(DPV)determination of Sull was reported.Fourier transform infrared spectroscopy(FT-IR),cyclic voltammetry and electrochemical impedance spectroscopy were used for the characterization of the modified electrode.The effects of instrumental and chemical parameters were optimized for the determination of Sull.The fabricated electrode was used for the analysis of Sull in fortified and real samples.High-performance liquid chromatography was preferred as a reference method for the evaluation of the obtained voltammetric results.Results:The electrochemical studies and FT-IR demonstrated that the SPGE was modified with DTT.The obtained peak current at DTT/SPGE was 6.67 times higher than that recorded with SPGE.At the optimized conditions of DPV in pH=2.5 of H2S04,the oxidation peak current of Sull was proportional to its concentration in:0.001-1.500 μmol L^(-1) with a detection limit of 0.0002 μmol L^(-1)(S/N=3).For the analysis of Sull,101.67%-104.33%of recovery percentage was obtained.Conclusions:A new electrode was successfully improved for the determination of Sull.This highly selective and sensitive electrode supplied the fast determination of Sull in ketchup,chili sauce and salsa dip sauce.In addition,voltammetric and chromatographic results are found to be consistent.展开更多
基金This work was supported by the Scientific and Technological Research Council of Turkey(TÜBİTAK)with a Grant Number of 214O248.
文摘DüzlerçamıWildlife Reserve Area(WRA)is the last natural habitat of fallow deer(Dama dama)in the world.Fallow deer is native to Turkey,however,its geographical range is currently confined to DüzlerçamıWRA,Antalya.To date,a detailed habitat investigation of fallow deer dis-tribution has not been conducted.This study is vital for the last surviving populations of fallow deer in Turkey.There-fore,we studied the habitat suitability and utilization of fal-low deer in the DüzlerçamıWRA.Vegetation and wildlife inventory was surveyed across a total of 304 sample areas between 2015 and 2017.Plant species were recorded accord-ing to the Braun-Blanquet method and wildlife surveys were based on footprints,feces,and other signs of fallow deer.Classification and regression tree techniques,as well as MAXENT,were used to model vegetation and fallow deer habitat.Topographic position index,terrain ruggedness index,roughness index,elevation,and bedrock formation were also calculated and included in the models.Based on our results,we drafted a habitat protection map for fallow deer.To ensure sustainability of habitats where populations of fallow deer are found in Turkey,we developed recommen-dations such as closuring human access of the 1st-degree Protection Area and reintroduction of the species to other potential habitats.
基金The National Science Foundation(NSF 1517474,1909109)the National Aeronautics and Space Administration(NASA 17ADAP17-68)both contributed funding to PHOEBE that we utilized。
文摘The first multiband photometric solutions of the short-period V Gru eclipsing binary from the southern hemisphere are presented in this study.Light curves of the system were observed through BVI filters at the Congarinni Observatory in Australia for 15 nights.In addition to the new ground-based data,we also used the TESS observations in two sectors.We analyzed the light curves of the system using the PHysics Of Eclipsing BinariEs(PHOEBE)2.4.7 version code to achieve the best accordance with the photometric observations.The solutions suggest that V Gru is a near-contact binary system with q=1.302(81)mass ratio,f_(1)=0.010(23),f_(2)=-0.0.009(21),and i=73.45(38).We considered the two hot spots on the hotter and cooler components for the light curve analysis.We extracted the minima times from the light curves based on the Markov Chain Monte Carlo(MCMC)approach.Using our new light curves,TESS,and additional literature minima,we computed the ephemeris of V Gru.The system’s eclipse timing variation trend was determined using the MCMC method.This system is a good and challenging case for future studies.
基金project was supported by the Scientific Research Projects Coordination Unit of Erciyes University(project number FBA-2022-11737)the TESS mission is provided by the NASA Explorer Program。
文摘The light curve analyses and orbital period variations for two contact binary stars,LS Del and V997 Cyg,are presented in this work which was conducted in the frame of the Binary Systems of South and North project Ground-based photometric observations were performed at two observatories in France.We used the Transiting Exoplanet Survey Satellite(TESS)data for extracting times of minima and light curve analysis of the targe systems.The O-C diagram for both systems displays a parabolic trend.LS Del and V997 Cyg’s orbital periods are increasing at rates of dP/dt=7.20×10^(-08)days yr^(-1)and dP/dt=2.54×10^(-08)days yr^(-1),respectively Therefore,it can be concluded that mass is being transferred from the less massive star to the more massive component with a rate of dM/dt=-1.96×10^(-7)M_(⊙)yr^(-1)for the LS Del system,and dM/dt=-3.83×10^(-7)M_(⊙)yr-1for V997 Cyg.The parameters of a third possible object in the system are also considered.The PHysics Of Eclipsing BinariEs Python code was used to analyze the light curves.The light curve solutions needed a cold starspot due to the asymmetry in the LS Del system’s light curve maxima.The mass ratio fill-out factor,and star temperature all indicate that both systems are contact binary types in this investigation.Two methods were applied to estimate the absolute parameters of the systems:one method relied on the parallax of Gaia DR3,and the other used a P-M relationship.The positions of the systems are also depicted on the M-L,M-R q-L_(ratio),and logM_(tot)-logJ_(0)diagrams.We recommend that further observations and investigations be done on the existence of a fourth body in this system.
基金the Deanship of Postgraduate Studies and Scientific Research at Majmaah University for funding this research work through the project number(R-2025-1567).
文摘Due to the intense data flow in expanding Internet of Things(IoT)applications,a heavy processing cost and workload on the fog-cloud side become inevitable.One of the most critical challenges is optimal task scheduling.Since this is an NP-hard problem type,a metaheuristic approach can be a good option.This study introduces a novel enhancement to the Artificial Rabbits Optimization(ARO)algorithm by integrating Chaotic maps and Levy flight strategies(CLARO).This dual approach addresses the limitations of standard ARO in terms of population diversity and convergence speed.It is designed for task scheduling in fog-cloud environments,optimizing energy consumption,makespan,and execution time simultaneously three critical parameters often treated individually in prior works.Unlike conventional single-objective methods,the proposed approach incorporates a multi-objective fitness function that dynamically adjusts the weight of each parameter,resulting in better resource allocation and load balancing.In analysis,a real-world dataset,the Open-source Google Cloud Jobs Dataset(GoCJ_Dataset),is used for performance measurement,and analyses are performed on three considered parameters.Comparisons are applied with well-known algorithms:GWO,SCSO,PSO,WOA,and ARO to indicate the reliability of the proposed method.In this regard,performance evaluation is performed by assigning these tasks to Virtual Machines(VMs)in the resource pool.Simulations are performed on 90 base cases and 30 scenarios for each evaluation parameter.The results indicated that the proposed algorithm achieved the best makespan performance in 80% of cases,ranked first in execution time in 61%of cases,and performed best in the final parameter in 69% of cases.In addition,according to the obtained results based on the defined fitness function,the proposed method(CLARO)is 2.52%better than ARO,3.95%better than SCSO,5.06%better than GWO,8.15%better than PSO,and 9.41%better than WOA.
基金the Scientific Research Projects Coordination Unit of Erciyes University(project number FBA–09–788)。
文摘The first photometric solution in the B,V,R_(c) and I_(c) filters of the short period V1833 Ori eclipsing binary is presented based on new ground-based CCD photometric observations.We analyzed the BVRI photometric light curves of the system,using PHOEBE 0.31 a,a binary star modeling program,with the Wilson-Devinney method based on Roche geometry to achieve the best accordance with the photometric observations to determine their absolute parameters from the light curves.We updated the ephemeris of V1833 Ori using two new light curve minima derived by our new observational data from those collected in the literature and analyzed the change of the system's orbital period.The O-C analysis indicates that the variations of the orbital period of V1833 Ori with time are increasing at a rate of 3.03×10^(-7)days yr^(-1).The distance of V1833 Ori is 173.7±15.6 pc.From the solutions,we find that V1833 Ori is an A-subtype W UMa overcontact binary with q=0.701 mass ratio and f=1.14 fill-out factor.The HR diagram positions of the eclipsing binary system's components are discussed.The system's absolute dimensions were compared to those of similar binaries in the log T_(eff)-log L,logM-logL,1 ogM-logR and logM-log J_(0)diagrams.
基金The Deanship of Scientific Research(DSR)at King Abdulaziz University,Jeddah,Saudi Arabia has funded this project,under grant no.FP-59-42.
文摘Lactic Acid Bacteria(LAB)from different niches can be responsible for the production of distinct exopolysaccharides(EPS)that might possess important structural and technological features.In this respect,the aim of this study was to isolate an EPS producer LAB strain from bee pollen environment.Leuconostoc mesenteroides BI-20 with a slimy-mucoid colony morphology was identified from bee pollen and the structural,technological and functional characteristics of EPS produced by this strain were determined.EPS BI-20 was a highly branched dextran containing 20%(1→3)-linked α-D-glucose branches determined by ^(1)H and ^(13)C NMR analysis.The presence of(1→6)/(1→3)-linkedα-D-glucose linkages in dextran BI-20 was also confirmed by FTIR analysis.Dextran BI-20,with a molecular weight of 1×10^(8) Da,possessed strong thermal properties,amorphous nature and highly branched and fibrous microstructural characteristics determined by DSC,TGA,XRD and SEM analysis,respectively.In terms of functional roles,dextran BI-20 demonstrated strong antioxidant capacity detected by ABTS and CUPRAC tests.Finally,no digestion was observed in dextran BI-20 under simulated gastric conditions.Results of this study unveiled techno-functional characteristics of dextran BI-20 produced by a bee pollen isolate LAB strain.
文摘Scientific research involving nanotechnology has grown exponentially and has led to the development of engineered nanoparticles（NPs）.Silica NPs have been used in numerous scientific and technological applications over the past decade,necessitating the development of efficient methods for their synthesis.Recent studies have explored the potential of laser ablation as a convenient way to prepare metal and oxide NPs.Due to its high silica content,low cost,and widespread availability,sugarbeet bagasse is highly suitable as a raw material for producing silica NPs via laser ablation.In this study,two different NP production methods were investigated：laser ablation and NaOH treatment.We developed a novel,one-step method to produce silica NPs from sugarbeet bagasse using laser ablation,and we characterized the silica NPs using environmental scanning electron microscopy（ESEM）,energy dispersive spectrometry（EDS）,dynamic light scattering（DLS）,transmission electron microscopy（TEM）,attenuated total reflectanceFourier transform infrared spectroscopy（ATR-FT1R）,X-ray photoelectron spectroscopy（XPS） and Raman spectroscopy.EDS analysis and XPS confirmed the presence of silica NPs.The NPs produced by laser ablation were smaller（38-190 nm） than those produced by NaOH treatment（531-825 nm）.Finally,we demonstrated positive effects of silica NPs produced from laser ablation on the growth of microalgae,and thus,our novel method may be beneficial as an environmentally friendly procedure to produce NPs.
文摘Objectives:The aim of this study is to investigate the electrochemical behavior of Sudan Ⅱ(Sull)using a screen-printed gold electrode(SPGE)modified with 1,4-dithiothreitol(DTT)and to determine the amount of Sudan II by voltammetry.Materials and Methods:A DTT-modified screen-printed gold electrode(DTT/SPGE)was fabricated and its application for differential pulse voltammetric(DPV)determination of Sull was reported.Fourier transform infrared spectroscopy(FT-IR),cyclic voltammetry and electrochemical impedance spectroscopy were used for the characterization of the modified electrode.The effects of instrumental and chemical parameters were optimized for the determination of Sull.The fabricated electrode was used for the analysis of Sull in fortified and real samples.High-performance liquid chromatography was preferred as a reference method for the evaluation of the obtained voltammetric results.Results:The electrochemical studies and FT-IR demonstrated that the SPGE was modified with DTT.The obtained peak current at DTT/SPGE was 6.67 times higher than that recorded with SPGE.At the optimized conditions of DPV in pH=2.5 of H2S04,the oxidation peak current of Sull was proportional to its concentration in:0.001-1.500 μmol L^(-1) with a detection limit of 0.0002 μmol L^(-1)(S/N=3).For the analysis of Sull,101.67%-104.33%of recovery percentage was obtained.Conclusions:A new electrode was successfully improved for the determination of Sull.This highly selective and sensitive electrode supplied the fast determination of Sull in ketchup,chili sauce and salsa dip sauce.In addition,voltammetric and chromatographic results are found to be consistent.
