Sevgi Aslıyüce
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Sevgi Aslıyüce has a total of 25 co-authors. Here are the top co-authors by number of shared publications:
- Adil Denizli
Department of Chemistry Hacettepe University Ankara Turkey
6 shared publications Adil Denizli
3 shared publications- Lokman Uzun
Department of Chemistry, Faculty of Science, Hacettepe University, Ankara, Turkiye
3 shared publications - Neslihan Idil
Department of Biology, Hacettepe University, 06800 Ankara, Turkey
3 shared publications - Rıdvan Say
Department of Chemistry Anadolu University Eskişehir Turkey
3 shared publications Nilay Bereli
Department of Chemistry, Hacettepe University, Beytepe, Ankara, Turkey
2 shared publications
Latest Publications
- 12 September 2025
- Published by Wiley in Pest Management Science
- Vol. 82 (1) , 104-113
Beauvericin, synthesized by entomopathogenic fungi, as a promising natural pesticide of Leptinotarsa decemlineata
BACKGROUND: Beauvericin (BEA) is a secondary metabolite produced by Beauveria bassiana , Isaria fumosorosea and Fusarium spp., known for its insecticidal properties. Leptinotarsa decemlineata , commonly known as the Colorado potato beetle, is a major pest that feeds primarily on potato plants. Over time, this species has developed resistance to many conventional insecticides, highlighting the need for novel control agents. BEA was purified from three B. bassiana and three I. fumosorosea strains using a molecularly imprinted cryogel column and tested for its efficacy against fourth‐instar larvae of L. decemlineata. To determine the optimal method for its application, BEA derived from the B. bassiana Lul1 isolate was initially evaluated using three methods: injection, spraying and leaf‐dipping. RESULTS: The lethal time for 50% mortality for the injection, spraying and leaf‐dipping methods were determined to be 7.8, 8.5 and 9.7 days. The spraying method was selected for subsequent dose–mortality studies using four concentrations of BEA from three B. bassiana and three I. fumosorosea isolates, and a commercial BEA. Significant differences in the lethal concentration for 50% mortality (LC₅₀) values were observed across different post‐exposure times. On days 5, 8 and 10, LC₅₀ values were 218.39, 0.07 and 0.04 μg/mL, respectively for the extract obtained from the B. bassiana isolate KVL 03129. CONCLUSION: In conclusion, BEA has significant potential as an effective insecticide candidate for controlling L. decemlineata populations, offering a promising alternative to traditional chemical insecticides. © 2025 Society of Chemical Industry.
- 12 September 2025
- Published by Wiley in Pest Management Science
- Vol. 82 (1) , 104-113
Beauvericin, synthesized by entomopathogenic fungi, as a promising natural pesticide of Leptinotarsa decemlineata
BACKGROUND: Beauvericin (BEA) is a secondary metabolite produced by Beauveria bassiana , Isaria fumosorosea and Fusarium spp., known for its insecticidal properties. Leptinotarsa decemlineata , commonly known as the Colorado potato beetle, is a major pest that feeds primarily on potato plants. Over time, this species has developed resistance to many conventional insecticides, highlighting the need for novel control agents. BEA was purified from three B. bassiana and three I. fumosorosea strains using a molecularly imprinted cryogel column and tested for its efficacy against fourth‐instar larvae of L. decemlineata. To determine the optimal method for its application, BEA derived from the B. bassiana Lul1 isolate was initially evaluated using three methods: injection, spraying and leaf‐dipping. RESULTS: The lethal time for 50% mortality for the injection, spraying and leaf‐dipping methods were determined to be 7.8, 8.5 and 9.7 days. The spraying method was selected for subsequent dose–mortality studies using four concentrations of BEA from three B. bassiana and three I. fumosorosea isolates, and a commercial BEA. Significant differences in the lethal concentration for 50% mortality (LC₅₀) values were observed across different post‐exposure times. On days 5, 8 and 10, LC₅₀ values were 218.39, 0.07 and 0.04 μg/mL, respectively for the extract obtained from the B. bassiana isolate KVL 03129. CONCLUSION: In conclusion, BEA has significant potential as an effective insecticide candidate for controlling L. decemlineata populations, offering a promising alternative to traditional chemical insecticides. © 2025 Society of Chemical Industry.
- Open Access
- 26 August 2023
- Published by MDPI AG in Micromachines
- Vol. 14 (9) , 1668
Recent Advances in Optical Sensing for the Detection of Microbial Contaminants
Microbial contaminants are responsible for several infectious diseases, and they have been introduced as important potential food- and water-borne risk factors. They become a global burden due to their health and safety threats. In addition, their tendency to undergo mutations that result in antimicrobial resistance makes them difficult to treat. In this respect, rapid and reliable detection of microbial contaminants carries great significance, and this research area is explored as a rich subject within a dynamic state. Optical sensing serving as analytical devices enables simple usage, low-cost, rapid, and sensitive detection with the advantage of their miniaturization. From the point of view of microbial contaminants, on-site detection plays a crucial role, and portable, easy-applicable, and effective point-of-care (POC) devices offer high specificity and sensitivity. They serve as advanced on-site detection tools and are pioneers in next-generation sensing platforms. In this review, recent trends and advances in optical sensing to detect microbial contaminants were mainly discussed. The most innovative and popular optical sensing approaches were highlighted, and different optical sensing methodologies were explained by emphasizing their advantages and limitations. Consequently, the challenges and future perspectives were considered.
- 26 August 2023
- Published by MDPI AG in Micromachines
- Vol. 14 (9) , 1668
Open AccessRecent Advances in Optical Sensing for the Detection of Microbial Contaminants
Microbial contaminants are responsible for several infectious diseases, and they have been introduced as important potential food- and water-borne risk factors. They become a global burden due to their health and safety threats. In addition, their tendency to undergo mutations that result in antimicrobial resistance makes them difficult to treat. In this respect, rapid and reliable detection of microbial contaminants carries great significance, and this research area is explored as a rich subject within a dynamic state. Optical sensing serving as analytical devices enables simple usage, low-cost, rapid, and sensitive detection with the advantage of their miniaturization. From the point of view of microbial contaminants, on-site detection plays a crucial role, and portable, easy-applicable, and effective point-of-care (POC) devices offer high specificity and sensitivity. They serve as advanced on-site detection tools and are pioneers in next-generation sensing platforms. In this review, recent trends and advances in optical sensing to detect microbial contaminants were mainly discussed. The most innovative and popular optical sensing approaches were highlighted, and different optical sensing methodologies were explained by emphasizing their advantages and limitations. Consequently, the challenges and future perspectives were considered.
- 21 March 2023
- Published by Springer Nature in Chemical Papers
- Vol. 77 (8) , 4331-4344
Screening the heavy metal removal capacity of magnetically modified fungal biosorbent
- 21 March 2023
- Published by Springer Nature in Chemical Papers
- Vol. 77 (8) , 4331-4344
Screening the heavy metal removal capacity of magnetically modified fungal biosorbent
- 28 February 2022
- Published by Hacettepe University in Hacettepe Journal of Biology and Chemistry
- Vol. 50 (2) , 205-214
Cefuroxime imprinted p(HEMATrp) Cryogels: Preparation, Characterization and Antibacterial role
Both Gram negative and positive bacterial strains are known as the most frequently responsible causative agents for wound infections. These infections can resulted in morbidity and mortality due to the severity. Antimicrobial agents have often been preferred to treat these infections. In this respect, Cefuroxime (CXM) belongs to the second-generation cephalosporins could be suggested against wound infections. In recent years, designing of drug delivery systems have received interest and cryogels are promising tools for creating these systems. Their elastic nature, high macroporosity, absorption and releasing ability make these materials unique for drug delivery. Besides, imprinting approach could be integrated into cryogelation and resultant matrix has an ability to recognize target antimicrobial agent having high selectivity and sensitivity prepared along with an easy and cost-effective methodology. In the present study, CXM was imprinted onto Hydroxyethyl methacrylate (HEMA) based N‐methacryloyl‐l‐tryptophan (MATrp) containing [p(HEMATrp)] cryogels. MATrp was used as the co-monomer for the preparation of CXM-p(HEMATrp) cryogels. Characterization experiments were performed to analyze the structure of prepared cryogels. Following drug loading and releasing assays, antimicrobial performances CXM-p(HEMATrp) cryogels were investigated against Staphylococcus aureus, Enterococcus faecalis and Escherichia coli. In conclusion, CXM-p(HEMATrp) cryogels have been recommended as potential carriers for further biomedical applications.
- 28 February 2022
- Published by Hacettepe University in Hacettepe Journal of Biology and Chemistry
- Vol. 50 (2) , 205-214
Cefuroxime imprinted p(HEMATrp) Cryogels: Preparation, Characterization and Antibacterial role
Both Gram negative and positive bacterial strains are known as the most frequently responsible causative agents for wound infections. These infections can resulted in morbidity and mortality due to the severity. Antimicrobial agents have often been preferred to treat these infections. In this respect, Cefuroxime (CXM) belongs to the second-generation cephalosporins could be suggested against wound infections. In recent years, designing of drug delivery systems have received interest and cryogels are promising tools for creating these systems. Their elastic nature, high macroporosity, absorption and releasing ability make these materials unique for drug delivery. Besides, imprinting approach could be integrated into cryogelation and resultant matrix has an ability to recognize target antimicrobial agent having high selectivity and sensitivity prepared along with an easy and cost-effective methodology. In the present study, CXM was imprinted onto Hydroxyethyl methacrylate (HEMA) based N‐methacryloyl‐l‐tryptophan (MATrp) containing [p(HEMATrp)] cryogels. MATrp was used as the co-monomer for the preparation of CXM-p(HEMATrp) cryogels. Characterization experiments were performed to analyze the structure of prepared cryogels. Following drug loading and releasing assays, antimicrobial performances CXM-p(HEMATrp) cryogels were investigated against Staphylococcus aureus, Enterococcus faecalis and Escherichia coli. In conclusion, CXM-p(HEMATrp) cryogels have been recommended as potential carriers for further biomedical applications.
- 5 January 2022
- Published by Hacettepe University in Hacettepe Journal of Biology and Chemistry
- Vol. 50 (1) , 55-64
Preparation and Investigation of Antibacterial Activities of Ciprofloxacin Imprinted p(HEMAH) Cryogels
Staphylococcus aureus, Enterococcus faecalis and Escherichia coli are the common causes of wound infections. For the treatment of these infections, ciprofloxacin can be recommended as a broad-spectrum antibiotic that acts on both Gram-negative and Gram-positive microorganisms. Besides, antimicrobial agents could be integrated into polymeric materials. Cryogels, one of these polymeric materials, are spongy polymers showing high macroporosity. In addition to their attractive usage as affinity support materials and scaffolds, they also appear as drug carrier materials in recent years. Molecular imprinting method is a recognition technique prepared by forming a polymeric network around the template. Although this method has been used in purification and separation processes for more than thirty years, it has gained great interest as a new approach that provides an advantage in drug release studies in terms of high drug loading capacity and long-term release. In this study, ciprofloxacin (CIP) imprinted 2-Hydroxyethyl methacrylate (HEMA) based N-methacryloyl-(L)-histidine methyl ester (MAH) containing [CIP-p(HEMAH)] cryogels was prepared and characterized. CIP releasing experiments were performed, and then, antimicrobial activities of CIP p(HEMAH) cryogels were examined against S. aureus, E. faecalis and E. coli. It can be concluded that CIP-p(HEMAH) cryogels could be proposed as promising polymeric materials for wound healing applications.
- 5 January 2022
- Published by Hacettepe University in Hacettepe Journal of Biology and Chemistry
- Vol. 50 (1) , 55-64
Preparation and Investigation of Antibacterial Activities of Ciprofloxacin Imprinted p(HEMAH) Cryogels
Staphylococcus aureus, Enterococcus faecalis and Escherichia coli are the common causes of wound infections. For the treatment of these infections, ciprofloxacin can be recommended as a broad-spectrum antibiotic that acts on both Gram-negative and Gram-positive microorganisms. Besides, antimicrobial agents could be integrated into polymeric materials. Cryogels, one of these polymeric materials, are spongy polymers showing high macroporosity. In addition to their attractive usage as affinity support materials and scaffolds, they also appear as drug carrier materials in recent years. Molecular imprinting method is a recognition technique prepared by forming a polymeric network around the template. Although this method has been used in purification and separation processes for more than thirty years, it has gained great interest as a new approach that provides an advantage in drug release studies in terms of high drug loading capacity and long-term release. In this study, ciprofloxacin (CIP) imprinted 2-Hydroxyethyl methacrylate (HEMA) based N-methacryloyl-(L)-histidine methyl ester (MAH) containing [CIP-p(HEMAH)] cryogels was prepared and characterized. CIP releasing experiments were performed, and then, antimicrobial activities of CIP p(HEMAH) cryogels were examined against S. aureus, E. faecalis and E. coli. It can be concluded that CIP-p(HEMAH) cryogels could be proposed as promising polymeric materials for wound healing applications.
- Open Access
- 17 February 2021
- Published by The Scientific and Technological Research Council of Turkey (TUBITAK-ULAKBIM) - DIGITAL COMMONS JOURNALS in TURKISH JOURNAL OF CHEMISTRY
- Vol. 45 (1) , 157-166
Heavy metal removal with magnetic coffee grain
The presence of heavy metals in environmental waters having an important place in the industrial waste is a major threat to viability. Heavy metals are transported to humans through the ecological cycle, damaging many tissues and organs. In recent years, agricultural and food waste can be used to remove heavy metals. At the present study, magnetically modified coffee grains which are alternative to conventional particle systems were prepared and heavy metal removal performances were investigated. The coffee grains used were magnetically modified by contact with water-based magnetic fluid. Magnetically modified coffee grains were characterized by scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) surface area analysis and electron spin resonance (ESR). Adsorption studies are made with four different heavy metal ions, namely Cu(II), Pb(II), Cd(II) and Zn(II). Adsorption isotherms were determined and heavy metal removal performance of magnetic coffee grains were investigated from synthetic waste water.
- 17 February 2021
- Published by The Scientific and Technological Research Council of Turkey (TUBITAK-ULAKBIM) - DIGITAL COMMONS JOURNALS in TURKISH JOURNAL OF CHEMISTRY
- Vol. 45 (1) , 157-166
Open AccessHeavy metal removal with magnetic coffee grain
The presence of heavy metals in environmental waters having an important place in the industrial waste is a major threat to viability. Heavy metals are transported to humans through the ecological cycle, damaging many tissues and organs. In recent years, agricultural and food waste can be used to remove heavy metals. At the present study, magnetically modified coffee grains which are alternative to conventional particle systems were prepared and heavy metal removal performances were investigated. The coffee grains used were magnetically modified by contact with water-based magnetic fluid. Magnetically modified coffee grains were characterized by scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) surface area analysis and electron spin resonance (ESR). Adsorption studies are made with four different heavy metal ions, namely Cu(II), Pb(II), Cd(II) and Zn(II). Adsorption isotherms were determined and heavy metal removal performance of magnetic coffee grains were investigated from synthetic waste water.
- 1 November 2020
- Published by Hacettepe University in Hacettepe Journal of Biology and Chemistry
- Vol. 48 (5) , 575-601
Molecular Imprinting Technology for Biomimetic Assemblies
The term biomimetic can be simply defined as the examination of nature. The scientists inspired by the enormous diversity of nature to solve human problems or facilitate daily life by mimicking natural models, systems, and elements especially in the biomedical and therapeutic applications to make better drugs, artificial organs, sensing instruments, etc. Biological recognition elements like proteins, antibodies, enzymes, DNA, lectins, aptamers, cells, and viruses have been heavily used to ensure specificity in such applications in spite of their lack of stability and reusability. However, in the last two decades molecularly imprinted polymers, MIPs, have been synthesized as an alternative to mimic natural biological interactions for a broad spectrum of templates by means of coordinating functional monomers around template in the presence of cross-linker. This review will outline the broad contours of biomimetics prepared by molecular imprinting techniques and their practical applications in the separation techniques, tissue engineering applications, biomimetic surfaces, sensors, artificial membranes, and drug delivery systems.
- 1 November 2020
- Published by Hacettepe University in Hacettepe Journal of Biology and Chemistry
- Vol. 48 (5) , 575-601
Molecular Imprinting Technology for Biomimetic Assemblies
The term biomimetic can be simply defined as the examination of nature. The scientists inspired by the enormous diversity of nature to solve human problems or facilitate daily life by mimicking natural models, systems, and elements especially in the biomedical and therapeutic applications to make better drugs, artificial organs, sensing instruments, etc. Biological recognition elements like proteins, antibodies, enzymes, DNA, lectins, aptamers, cells, and viruses have been heavily used to ensure specificity in such applications in spite of their lack of stability and reusability. However, in the last two decades molecularly imprinted polymers, MIPs, have been synthesized as an alternative to mimic natural biological interactions for a broad spectrum of templates by means of coordinating functional monomers around template in the presence of cross-linker. This review will outline the broad contours of biomimetics prepared by molecular imprinting techniques and their practical applications in the separation techniques, tissue engineering applications, biomimetic surfaces, sensors, artificial membranes, and drug delivery systems.
- 15 March 2017
- Published by Wiley in Journal of Separation Science
- Vol. 40 (7) , 1610-1620
Protein C recognition by ion-coordinated imprinted monolithic cryogels
The protein C imprinted monolithic cryogel was synthesized using 2-hydroxyethyl methacrylate by redox cryo-polymerization method. The prepared monolithic cryogel was characterized by Fourier transform infrared spectroscopy, swelling test, surface area measurements and scanning electron microscopy. The non-imprinted cryogel was prepared as well for control. Adsorption of protein C from aqueous solutions was investigated in a continuous mode and several parameters affecting adsorption performance were optimized. The maximum protein C adsorption amount was 30.4 mg/g. The selectivity studies were performed by monolithic column studies and fast protein liquid chromatography, using hemoglobin and human serum albumin as competing proteins. The relative selectivity coefficients were 2.37 and 8.89 for hemoglobin and human serum albumin, respectively. Reusability was tested for ten consecutive adsorption–desorption cycles, and no significant change in adsorption capacity was recorded. A pseudo-second-order model was suitable to interpret kinetic data, and the Langmuir model suited the adsorption isotherms well. This article is protected by copyright. All rights reserved
- 15 March 2017
- Published by Wiley in Journal of Separation Science
- Vol. 40 (7) , 1610-1620
Protein C recognition by ion-coordinated imprinted monolithic cryogels
The protein C imprinted monolithic cryogel was synthesized using 2-hydroxyethyl methacrylate by redox cryo-polymerization method. The prepared monolithic cryogel was characterized by Fourier transform infrared spectroscopy, swelling test, surface area measurements and scanning electron microscopy. The non-imprinted cryogel was prepared as well for control. Adsorption of protein C from aqueous solutions was investigated in a continuous mode and several parameters affecting adsorption performance were optimized. The maximum protein C adsorption amount was 30.4 mg/g. The selectivity studies were performed by monolithic column studies and fast protein liquid chromatography, using hemoglobin and human serum albumin as competing proteins. The relative selectivity coefficients were 2.37 and 8.89 for hemoglobin and human serum albumin, respectively. Reusability was tested for ten consecutive adsorption–desorption cycles, and no significant change in adsorption capacity was recorded. A pseudo-second-order model was suitable to interpret kinetic data, and the Langmuir model suited the adsorption isotherms well. This article is protected by copyright. All rights reserved
- 1 May 2016
- Published by Elsevier in Journal of Chromatography B
- Vol. 1021, 204-212
Synthesis and use of protein G imprinted cryogel as affinity matrix to purify protein G from cell lyaste
- 1 May 2016
- Published by Elsevier in Journal of Chromatography B
- Vol. 1021, 204-212
Synthesis and use of protein G imprinted cryogel as affinity matrix to purify protein G from cell lyaste
- 1 June 2013
- Published by Elsevier in Reactive and Functional Polymers
- Vol. 73 (6) , 813-820
Immunoglobulin G recognition with Fab fragments imprinted monolithic cryogels: Evaluation of the effects of metal-ion assisted-coordination of template molecule
- 1 June 2013
- Published by Elsevier in Reactive and Functional Polymers
- Vol. 73 (6) , 813-820
Immunoglobulin G recognition with Fab fragments imprinted monolithic cryogels: Evaluation of the effects of metal-ion assisted-coordination of template molecule