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Papers by SAFİYE ELİF KORCAN
δ-Aminolevulinic acid dehydratase (ALAD; E.C. 4.2.1.24) is a metalloprotein and plays a crucial r... more δ-Aminolevulinic acid dehydratase (ALAD; E.C. 4.2.1.24) is a metalloprotein and plays a crucial role in heme synthesis. Its sensitivity to toxic metals depends on the metallic co-factors. In this study the effects of some heavy metals on ALADs activity of five Pseudomonas isolates from Akarçay stream (Afyon-karahisar) have been studied in order to determine whether their ALADs could be used as biosensor for lead and other heavy metals contamination. The data obtained from the study were analysed statistically by using SPSS 10.0 software for Windows. According to the results, Ni(II) increased the ALAD activity of Pseudomonas putida, Pseudomonas pseudoalcaligenes and Pseudomonas aureginosa ATTC 27853. Mn(II) also increased the enzymic activity in all strains examined except P. pseudoalcaligenes. These were found not to be statistically meaningful. P. aeruginosa 2's enzymic activity was inhibited by Mg(II) and Zn (II), significantly (p<0.05). There was a statistically meaningful relation between enzymic activity of both P. pseudoalcaligenes, P. putida and increasing Pb(II) concentration (p<0.05). In addition, a formula was also deviced in order to determine the doses of metals in the environment of the organisms. As a result of the study, we can suggest that Pseudomonas ALADs can be used as a biosensor for lead and some other heavy metal exposure in aquatic environments.
Environmental monitoring and …, Jan 1, 2007
Applied Biochemistry and Microbiology, 2008
In this study, δ-aminolevulinic acid dehydratase (ALAD) from Streptomyces yokosukanensis ATCC 255... more In this study, δ-aminolevulinic acid dehydratase (ALAD) from Streptomyces yokosukanensis ATCC 25520, producer of an unusual purine riboside antibiotic called nebularine, was purified and characterized. Purification procedures were involved with ammonium sulphate precipitation and gel filtration techniques by use of Sephacryl S-200. After gel filtration a 90.76-fold purification was obtained. The maximum enzymic activity was observed in the supernatant after 100% precipitation. According to the data obtained from the investigation, the enzyme was found to be a single polypeptide having a molecular mass around 34.8 kDa. This was determined by SDS-PAGE. Its optimal temperature was around 45° C, and optimal pH was found to be 8.0. Some heavy metals, Pb2+, Zn2+, Fe3+, Co2+, Mn2+, and Mg 2+, inhibited its activity between 20–51%, and Ni2+ increased its activity up to 15%. The text was submitted by the authors in English.
Environmental …, Jan 1, 2010
International journal of food …, Jan 1, 2007
Sustainable Development and Biodiversity, 2015
Günümüzde antibiyotiklerin yanlış kullanımı sonucunda, antibiyotiklere çoğul dirençli suşların or... more Günümüzde antibiyotiklerin yanlış kullanımı sonucunda, antibiyotiklere çoğul dirençli suşların ortaya çıkması, kullanıma sunulacak yeni antibiyotik türevlerin araştırılmasını zorunlu hale getirmiştir. Kullanıma sunulan antibiyotikler doğal, sentetik veya yarı sentetik antibiyotiktir. Doğal antibiyotiklerden Actinomycin, Novobiocin, Nystatin, Gentamycin, Streptomycin, Teracyclin, Vancomycin gibi birçok antibiyotiğin yer aldığı antimikrobiyal maddeler Streptomyces türleri tarafından üretilmektedir. Ülkemizde Streptomyces türleri ile yapılan çalışmalarda antimikrobiyal etkinlikler saptanmış anacak bu maddelerin tanımlanması henüz yapılmamıştır. Çalışmamızda Afyon Kocatepe Üniversitesi Ahmet Necdet Sezer Kampüsünün farklı iki bölgesinden alınan toprak örneklerinden Streptomyces izolasyonu yapıldı. İzolatlar mikroskobik olarak incelendikten sonra biyokimyasal testler ile (Gram boyama ve katalaz) Streptomyces türleri olduğu doğrulandı. Katalaz (+) ve Gram (+) olan suşların; S. aureus (ATC...
The aim of this research was the isolation of thermophilic Bacillus sp. from different sources an... more The aim of this research was the isolation of thermophilic Bacillus sp. from different sources and grouping by 16S-ITS rDNA RFLP. Seventy-four thermophilic strains were isolated from various environmental samples. Since fifteen isolated strains were Gram (+), endospore forming rods, they were identified as Bacillus sp. These strains were screened for the existence of five extracellular enzyme activities. These were, lipases, amylases, proteases, xylanases, cellulases. 16S-ITS rDNA RFLP profiles were produced by using two restriction endonucleases Taq I and Hae III. The isolated strains were clustered into eigth groups by Taq I restriction profiles of 16S-ITS rDNA while seven groups were obtained by Hae III digestion profiles.
zet Bu çalışmada Konya'dan toplanan ve endemik bir bitki olan Sartoria hedysaroides'in as... more zet Bu çalışmada Konya'dan toplanan ve endemik bir bitki olan Sartoria hedysaroides'in aseton, etanol ve metanol ekstrelerinin üç farklı konsantrasyonu (50, 100, 150 μg/plak) kullanılarak, antimikrobiyal aktivitelerinin belirlenmesi amaçlanmıştır. Çalışma disk difüzyon yöntemi kullanılarak Escherichia coli (ATCC 25992), Enterecoccus fecalis (ATCC 29212), Bacillus subtilis (NRS-744), Bacillus cereus (ATCC 11778), Pseudomonas aeruginosa, Proteus vulgaris, Micrococcus luteus, Listeria monocytogenes (ATCC 7644), Klebsiella pneumoniae, Yersinia enterecolitica mikroorganizmaları üzerinde denenmiştir. Genel olarak elde edilen zon çapları konsantrasyonun artmasına bağlı olarak artmış olmakla birlikte pozitif kontrol olarak kullanılan amikasin'in oluşturduğu zon çapına ulaşamamıştır. Bulgularımıza göre S. hedysaroides ekstrelerinin bazı Gram (+) ve (-) bakterilere karşı düşük antimikrobiyal aktivite gösterdiği belirlenmiştir. Abstract In this study, extracts of Sartoria hedysaroi...
Journal of Applied Biological Sciences
We aimed to determined that characterization of antimicrobial compounds of Actinomycete isolates ... more We aimed to determined that characterization of antimicrobial compounds of Actinomycete isolates (A32, A33) which were determined have antimicrobial activities in a previous study of ours. Different fermentation media were used to determination effective antimicrobial compounds production of AA32 and AA33 by fermentation. Fermentation procedure were performed in three major steps: sporulation, inoculation, and fermentation. Effective antimicrobial molecules of AA32 and AA33 to determined as test microorganisms Staphylococcus aureus ATCC 25923 and Esherichia coli ATCC 25922 were used during fermentation. Raw materials extraction of AA32 and AA33 were performed by solvent extraction and active compound determination were performed by using TLC, biootography, colon chromatography and UV spectrophotometer methods. Also to describe these two isolates, fatty acid profiles were determined using gas chromatography. As conclusion, The isolate AA32 was identified as Streptomyces-halstedii-oli...
Saudi medical journal, 2006
To investigate the respiratory symptoms and atopic sensitization to fungi and its relation with t... more To investigate the respiratory symptoms and atopic sensitization to fungi and its relation with the building type where school children were attending. We also compared the prevalence of sensitization to different fungi and respiratory symptoms in 2 different school buildings in a particular area of Turkey. Using simple random sampling, 301 school children aged 16-19 years attending a high school in 2 different school buildings (old and new buildings) were recruited and agreed to participate in the study. The study was conducted in Afyonkarahisar, Turkey from August 2003 to August 2004. Information on allergic diseases, building related symptoms and respiratory symptoms of the students was collected by questionnaire. Skin prick test (SPT) was performed to all students. Fungal concentrations and genera were determined by using Petri Plate Gravitational Settling Method. In both buildings, throughout all seasons, the most common fungi species seen were Penicillium and Cladosporium. Whe...
Journal of environmental biology / Academy of Environmental Biology, India, 2013
The study was conducted to evaluate the antimicrobial properties of the root extracts of some Lim... more The study was conducted to evaluate the antimicrobial properties of the root extracts of some Limonium species, viz. L. effusum, L. globuliferum and L. lilacinum. The root extracts obtained were evaluated against 9 bacteria, and 12 fungi isolated from hazelnut, and walnut. The maximum antibacterial activity was obseved to be in methanol extract. Furthermore, the ethanol extract of L. lilacinum also had the maximum antibacterial activity against L. monocytopenus. The methanol extract of L. lilacinum exhibited the most potent antibacterial activity among the tested extracts. Our findings showed that Limonium root extracts significantly reduced the growth of fungi as compared to control. The inhibitory effects of the Limonium root extracts on the mycelial growth of 12 fungal species isolated from nuts in agar diffusion plate assay showed fungal growth reduced at the 6th day of experiment. The mycelial growth of A. alternata was maximum inhibited (100%) by L. globuliferum water extracts...
Diseases of Aquatic Organisms, 2014
Water, Air, & Soil Pollution, 2013
Journal of Macromolecular Science, Part A, 2007
Journal of Macromolecular Science, Part A, 2013
ABSTRACT Four new dendritic structures carrying perfluorobenzyl bromide on the surface and calix[... more ABSTRACT Four new dendritic structures carrying perfluorobenzyl bromide on the surface and calix[4]arene and cyclam as a core were synthesized by using the convergent approach. These structures were determined by 1H-NMR, 13C-NMR and elemental analysis. Thermal stabilities of fluorinated dendritic structures were investigated using thermogravimetric analysis. Activation energies and thermal degradation of the structures were calculated with the Ozawa method. Thermogravimetric analysis of the dendritic structures reveals that the thermal stability of the structures increases with an increase in the number of the fluorine atoms. Dendritic structures synthesized were tested for their antimicrobial activity against, Salmonella typhimurium NRRLB, Micrococcus luteus, Pseudomonas aeruginosa, Enterococcus fecalis ATCC-29212, Bacillus cereus ATCC-117787, Klepsiella pneumoniae, Bacillus subtilis NRS-744 and Proteus vulgoris, Yersinia enterolitica, Saccharomyces cereviciae. The structures showed comparative activity against different strains of bacteria. Biological activities of the dendritic structures were seen to increase with an increase in fluorination and the number of nitrogen atoms.
International Journal of Food Microbiology, 2007
Environmental Monitoring and Assessment, 2010
δ-Aminolevulinic acid dehydratase (ALAD; E.C. 4.2.1.24) is a metalloprotein and plays a crucial r... more δ-Aminolevulinic acid dehydratase (ALAD; E.C. 4.2.1.24) is a metalloprotein and plays a crucial role in heme synthesis. Its sensitivity to toxic metals depends on the metallic co-factors. In this study the effects of some heavy metals on ALADs activity of five Pseudomonas isolates from Akarçay stream (Afyon-karahisar) have been studied in order to determine whether their ALADs could be used as biosensor for lead and other heavy metals contamination. The data obtained from the study were analysed statistically by using SPSS 10.0 software for Windows. According to the results, Ni(II) increased the ALAD activity of Pseudomonas putida, Pseudomonas pseudoalcaligenes and Pseudomonas aureginosa ATTC 27853. Mn(II) also increased the enzymic activity in all strains examined except P. pseudoalcaligenes. These were found not to be statistically meaningful. P. aeruginosa 2's enzymic activity was inhibited by Mg(II) and Zn (II), significantly (p<0.05). There was a statistically meaningful relation between enzymic activity of both P. pseudoalcaligenes, P. putida and increasing Pb(II) concentration (p<0.05). In addition, a formula was also deviced in order to determine the doses of metals in the environment of the organisms. As a result of the study, we can suggest that Pseudomonas ALADs can be used as a biosensor for lead and some other heavy metal exposure in aquatic environments.
Environmental monitoring and …, Jan 1, 2007
Applied Biochemistry and Microbiology, 2008
In this study, δ-aminolevulinic acid dehydratase (ALAD) from Streptomyces yokosukanensis ATCC 255... more In this study, δ-aminolevulinic acid dehydratase (ALAD) from Streptomyces yokosukanensis ATCC 25520, producer of an unusual purine riboside antibiotic called nebularine, was purified and characterized. Purification procedures were involved with ammonium sulphate precipitation and gel filtration techniques by use of Sephacryl S-200. After gel filtration a 90.76-fold purification was obtained. The maximum enzymic activity was observed in the supernatant after 100% precipitation. According to the data obtained from the investigation, the enzyme was found to be a single polypeptide having a molecular mass around 34.8 kDa. This was determined by SDS-PAGE. Its optimal temperature was around 45° C, and optimal pH was found to be 8.0. Some heavy metals, Pb2+, Zn2+, Fe3+, Co2+, Mn2+, and Mg 2+, inhibited its activity between 20–51%, and Ni2+ increased its activity up to 15%. The text was submitted by the authors in English.
Environmental …, Jan 1, 2010
International journal of food …, Jan 1, 2007
Sustainable Development and Biodiversity, 2015
Günümüzde antibiyotiklerin yanlış kullanımı sonucunda, antibiyotiklere çoğul dirençli suşların or... more Günümüzde antibiyotiklerin yanlış kullanımı sonucunda, antibiyotiklere çoğul dirençli suşların ortaya çıkması, kullanıma sunulacak yeni antibiyotik türevlerin araştırılmasını zorunlu hale getirmiştir. Kullanıma sunulan antibiyotikler doğal, sentetik veya yarı sentetik antibiyotiktir. Doğal antibiyotiklerden Actinomycin, Novobiocin, Nystatin, Gentamycin, Streptomycin, Teracyclin, Vancomycin gibi birçok antibiyotiğin yer aldığı antimikrobiyal maddeler Streptomyces türleri tarafından üretilmektedir. Ülkemizde Streptomyces türleri ile yapılan çalışmalarda antimikrobiyal etkinlikler saptanmış anacak bu maddelerin tanımlanması henüz yapılmamıştır. Çalışmamızda Afyon Kocatepe Üniversitesi Ahmet Necdet Sezer Kampüsünün farklı iki bölgesinden alınan toprak örneklerinden Streptomyces izolasyonu yapıldı. İzolatlar mikroskobik olarak incelendikten sonra biyokimyasal testler ile (Gram boyama ve katalaz) Streptomyces türleri olduğu doğrulandı. Katalaz (+) ve Gram (+) olan suşların; S. aureus (ATC...
The aim of this research was the isolation of thermophilic Bacillus sp. from different sources an... more The aim of this research was the isolation of thermophilic Bacillus sp. from different sources and grouping by 16S-ITS rDNA RFLP. Seventy-four thermophilic strains were isolated from various environmental samples. Since fifteen isolated strains were Gram (+), endospore forming rods, they were identified as Bacillus sp. These strains were screened for the existence of five extracellular enzyme activities. These were, lipases, amylases, proteases, xylanases, cellulases. 16S-ITS rDNA RFLP profiles were produced by using two restriction endonucleases Taq I and Hae III. The isolated strains were clustered into eigth groups by Taq I restriction profiles of 16S-ITS rDNA while seven groups were obtained by Hae III digestion profiles.
zet Bu çalışmada Konya'dan toplanan ve endemik bir bitki olan Sartoria hedysaroides'in as... more zet Bu çalışmada Konya'dan toplanan ve endemik bir bitki olan Sartoria hedysaroides'in aseton, etanol ve metanol ekstrelerinin üç farklı konsantrasyonu (50, 100, 150 μg/plak) kullanılarak, antimikrobiyal aktivitelerinin belirlenmesi amaçlanmıştır. Çalışma disk difüzyon yöntemi kullanılarak Escherichia coli (ATCC 25992), Enterecoccus fecalis (ATCC 29212), Bacillus subtilis (NRS-744), Bacillus cereus (ATCC 11778), Pseudomonas aeruginosa, Proteus vulgaris, Micrococcus luteus, Listeria monocytogenes (ATCC 7644), Klebsiella pneumoniae, Yersinia enterecolitica mikroorganizmaları üzerinde denenmiştir. Genel olarak elde edilen zon çapları konsantrasyonun artmasına bağlı olarak artmış olmakla birlikte pozitif kontrol olarak kullanılan amikasin'in oluşturduğu zon çapına ulaşamamıştır. Bulgularımıza göre S. hedysaroides ekstrelerinin bazı Gram (+) ve (-) bakterilere karşı düşük antimikrobiyal aktivite gösterdiği belirlenmiştir. Abstract In this study, extracts of Sartoria hedysaroi...
Journal of Applied Biological Sciences
We aimed to determined that characterization of antimicrobial compounds of Actinomycete isolates ... more We aimed to determined that characterization of antimicrobial compounds of Actinomycete isolates (A32, A33) which were determined have antimicrobial activities in a previous study of ours. Different fermentation media were used to determination effective antimicrobial compounds production of AA32 and AA33 by fermentation. Fermentation procedure were performed in three major steps: sporulation, inoculation, and fermentation. Effective antimicrobial molecules of AA32 and AA33 to determined as test microorganisms Staphylococcus aureus ATCC 25923 and Esherichia coli ATCC 25922 were used during fermentation. Raw materials extraction of AA32 and AA33 were performed by solvent extraction and active compound determination were performed by using TLC, biootography, colon chromatography and UV spectrophotometer methods. Also to describe these two isolates, fatty acid profiles were determined using gas chromatography. As conclusion, The isolate AA32 was identified as Streptomyces-halstedii-oli...
Saudi medical journal, 2006
To investigate the respiratory symptoms and atopic sensitization to fungi and its relation with t... more To investigate the respiratory symptoms and atopic sensitization to fungi and its relation with the building type where school children were attending. We also compared the prevalence of sensitization to different fungi and respiratory symptoms in 2 different school buildings in a particular area of Turkey. Using simple random sampling, 301 school children aged 16-19 years attending a high school in 2 different school buildings (old and new buildings) were recruited and agreed to participate in the study. The study was conducted in Afyonkarahisar, Turkey from August 2003 to August 2004. Information on allergic diseases, building related symptoms and respiratory symptoms of the students was collected by questionnaire. Skin prick test (SPT) was performed to all students. Fungal concentrations and genera were determined by using Petri Plate Gravitational Settling Method. In both buildings, throughout all seasons, the most common fungi species seen were Penicillium and Cladosporium. Whe...
Journal of environmental biology / Academy of Environmental Biology, India, 2013
The study was conducted to evaluate the antimicrobial properties of the root extracts of some Lim... more The study was conducted to evaluate the antimicrobial properties of the root extracts of some Limonium species, viz. L. effusum, L. globuliferum and L. lilacinum. The root extracts obtained were evaluated against 9 bacteria, and 12 fungi isolated from hazelnut, and walnut. The maximum antibacterial activity was obseved to be in methanol extract. Furthermore, the ethanol extract of L. lilacinum also had the maximum antibacterial activity against L. monocytopenus. The methanol extract of L. lilacinum exhibited the most potent antibacterial activity among the tested extracts. Our findings showed that Limonium root extracts significantly reduced the growth of fungi as compared to control. The inhibitory effects of the Limonium root extracts on the mycelial growth of 12 fungal species isolated from nuts in agar diffusion plate assay showed fungal growth reduced at the 6th day of experiment. The mycelial growth of A. alternata was maximum inhibited (100%) by L. globuliferum water extracts...
Diseases of Aquatic Organisms, 2014
Water, Air, & Soil Pollution, 2013
Journal of Macromolecular Science, Part A, 2007
Journal of Macromolecular Science, Part A, 2013
ABSTRACT Four new dendritic structures carrying perfluorobenzyl bromide on the surface and calix[... more ABSTRACT Four new dendritic structures carrying perfluorobenzyl bromide on the surface and calix[4]arene and cyclam as a core were synthesized by using the convergent approach. These structures were determined by 1H-NMR, 13C-NMR and elemental analysis. Thermal stabilities of fluorinated dendritic structures were investigated using thermogravimetric analysis. Activation energies and thermal degradation of the structures were calculated with the Ozawa method. Thermogravimetric analysis of the dendritic structures reveals that the thermal stability of the structures increases with an increase in the number of the fluorine atoms. Dendritic structures synthesized were tested for their antimicrobial activity against, Salmonella typhimurium NRRLB, Micrococcus luteus, Pseudomonas aeruginosa, Enterococcus fecalis ATCC-29212, Bacillus cereus ATCC-117787, Klepsiella pneumoniae, Bacillus subtilis NRS-744 and Proteus vulgoris, Yersinia enterolitica, Saccharomyces cereviciae. The structures showed comparative activity against different strains of bacteria. Biological activities of the dendritic structures were seen to increase with an increase in fluorination and the number of nitrogen atoms.
International Journal of Food Microbiology, 2007
Environmental Monitoring and Assessment, 2010