Yazar "Firat, Mehmet" seçeneğine göre listele
Listeleniyor 1 - 14 / 14
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Bioguided Isolation of Secondary Metabolites fromSalvia cerino-pruinosa Rech. f. var. cerino-pruinosa(2021) Kolak, Ufuk; Ertas, Abdulselam; Firat, Mehmet; Cakirca, Hatice; Topcu, Gulacti; Yener, Ismail; Akdeniz, MehmetIn the current study, the ethanol extracts prepared from the aerial parts and roots of an endemicspecies, Salvia cerino-pruinosa Rech. f. var. cerino-pruinosa were fractionated on silica gel columns and testedfor determination of their antioxidant activity using DPPH free radical and ABTS cation radical scavenging, andcupric reducing antioxidant capacity (CUPRAC) test assays. Twenty known secondary metabolites were isolatedfrom the active antioxidant fractions; rosmarinic acid (1), chlorogenic acid (2), caffeic acid (3), 4- hydroxybenzoic acid (4), benzoic acid (5), luteolin 7-O-glucoside (6), bis-(2-ethylhexyl)benzene-1,2- dicarboxylate (7), salvianolic acid A (8), salvianolic acid B (9), 7-acetylroyleanone (10), 6,7-dehydroroyleanone(11), ferruginol (12), inuroyleanol (13), 12-hydroxy-6,7-secoabieta-8,11,13-triene-6,7-dial (14), ursolic acid(15), oleanolic acid (16), taraxasterol (17), lupenone (18), ?-sitosterol (19), and stigmasterol (20). Rosmarinicacid, which was obtained from the aerial parts, was found to be the best antioxidant compound among theisolated secondary metabolites in DPPH free radical and ABTS cation radical scavenging, and CUPRAC assays(IC50: 1.20±0.04 ?g/mL, IC50: 1.74±0.06 ?g/mL, A0.5: 1.22±0.02 ?g/mL, respectively). Chlorogenic and caffeicacids, luteolin 7-O-glucoside, salvianolic acids A and B, and inuroyleanol exhibited also high antioxidantactivity in the mentioned assays.Öğe Chemical profile by LC-MS/MS, GC/MS and antioxidant activities of the essential oils and crude extracts of two Euphorbia species(Taylor & Francis Ltd, 2015) Ertas, Abdulselam; Yilmaz, Mustafa Abdullah; Firat, MehmetIn this study, it was aimed to investigate the chemical composition and antioxidant activities of two Euphorbia species. The major component of the fatty acid compositions obtained from the petroleum ether extracts was identified as palmitic acid for Euphorbia gaillardotii and Euphorbia macroclada. The main constituents of the essential oils were identified as arachidic acid for E. gaillardotii and tetratetracontane for E. macroclada. Among the 27 studied compounds, hesperidin, rutin, hyperoside and quinic, malic, gallic and tannic acids were found to be the most abundant compounds in the two Euphorbia species. The methanol extracts of E. gaillardotii and E. macroclada showed strong antioxidant activity in all tested methods. Particularly, IC50 values of E. macroclada methanol extract that was the richest in terms of total phenolic-flavonoid contents were found to be lower than alpha-tocopherol and butylated hydroxytoluene in beta-carotene bleaching, 2,2-diphenyl-1-picrylhydrazyl free and ABTS cation radical scavenging methods.Öğe Comparison of chemical and biological properties of in vivo and in vitro samples of Salvia siirtica Kahraman, Celep & Dogan extracts prepared with different solvents(Elsevier, 2021) Fidan, Hilal Saruhan; Kilinc, Fatih Mehmet; Yilmaz, Mustafa Abdullah; Akdeniz, Mehmet; Yener, Ismail; Firat, Mehmet; Onay, AhmetThe use of Salvia species among the public and their importance in the scientific world increase due to their numerous pharmacological and biological activities on a daily basis. In this study, the phytochemical contents of different parts (root, branch, leaf, flower, whole) of different specimens of Salvia siirtica (SS) (in vivo and in vitro) extracts prepared with various solvents (petroleumether, chloroformand ethanol) were determined using different techniques (GC-MS and LC-MS/MS) and the results were compared. In addition, biological activities (antioxidant, cytotoxic, anticholinesterase antiurease, antityrosinase, antielastase and anticollagenase) of all samples were determined and compared. The antioxidant potential of the analysed samples was found to be high, and their enzyme activity potential was low. Besides, in vitro SS-TIS (Temporary Immersion System) sample showed high cytotoxic activity (viability% 2.12 +/- 0.06) against MCF-7 (breast cancer) cell line. The results of GC-MS and LC-MS/MS analyses indicated that ferruginol and sugiol could be isolated from the ethanol extract of S. siirtica roots, salvigenin and beta-sitosterol from the chloroform extract of the aerial parts, and phenolic compounds from the ethanol extract of the aerial parts. In addition, the amount of rosmarinic acid, caffeic acid and 12-demethylmulticauline of in vitro samples were found to be higher than those of in vivo samples. Furthermore, all samples, both in vivo and in vitro, contained high levels of rosmarinic acid and beta-sitosterol. The whole chloroform extract (SSWC) could be the source extract for salvigenin (33952.13 mu g/g) and beta-sitosterol (16369.71 mu g/g), and the root ethanol extract (SSRE) for ferruginol (17721.99 mu g/g). As a result, it is understood that the nature of the plant material, the choice of an appropriate solvent and the parts of the material used are quite effective in chemical content. S. siirtica promise potential natural antioxidant agent in food and/or pharmaceutical industry due to its phytochemical content (rosmarinic and caffeic acids, ferruginol, salvigenin) and antioxidant activity. (C) 2021 Published by Elsevier B.V. on behalf of SAAB.Öğe Comprehensive study of chemical composition and biological activity of Thymus pubescens Boiss. et Kotschy ex Celak(Elsevier, 2022) Yigitkan, Serkan; Akdeniz, Mehmet; Yener, Ismail; Seker, Zeki; Yilmaz, Mustafa Abdullah; Firat, Mehmet; Kavak, Deniz EvrimThe use of Thymus species amongst the public and their importance in the scientific world is increasing day by day. In addition to being consumed as tea and spice, Thymus species are used as folk medicine for respiratory, digestive, skin, circulatory, genital, nervous, visual and urinary diseases. In this study, it was aimed to examine the essential oil and ethanol extract of the root and aerial parts of Thymus pubescens Boiss. et Kotschy ex Celak in the terms of their biological activity and chemical content. The phenolic content of the species was determined by LC-MS/MS, while triterpenoid content, the chemical composition of the essential oil as well as flavour was determined by GC-MS. In addition, their antioxidant and cytotoxic activities, as well as acetyl- (AChE) and butyrylcholinesterase (BChE), urease, tyrosinase, elastase, collagenase, HMG-CoA reductase and angiotensin-converting enzyme (ACE) inhibitory activities were studied. Thymol (53.33%) was determined as the major component in the essential oil, while b-fenchyl alcohol (43.87%) was determined as the major component of the flavour. According to the LC-MS/MS and GC-MS results, it was found that especially the aerial parts of the species have a high amount of rosmarinic acid (3875.76 mg analyte/g extract), quinic acid (2392.55), naringenin (970.39), oleanolic (92785.96) and ursolic (63373.32) acids. The essential oil of T. pubescens species was observed to show high activity in four antioxidant assays, e.g. inhibition of lipid peroxidation, DPPH and ABTS radical scavenging activity as well as CUPRAC, while the ethanol extracts showed moderate antioxidant activity. In enzyme inhibition assays, the aerial parts exerted marked BChE, elastase, and collagenase inhibitory activities (92.43 +/- 1.28%, 42.59 +/- 0.56, and 48.61 +/- 0.39 at 100 mg/mL, respectively). On the other hand, AChE, urease, tyrosinase, HMG-CoA reductase and ACE inhibitory activities of all extracts were from low to moderate levels. In particular, the aerial parts of the species displayed a high cytotoxic effect (vitality%: 6.82 +/- 0.01 at 200 mg/mL) in breast cancer (MCF-7) cell line. Due to its remarkable antioxidant capacity, high content of rosmarinic, oleanolic, and ursolic acids and especially BChE, elastase, and collagenase inhibitory activity, T. pubescens has the potential for using in food supplements, food preservatives, cosmetics, and pharmaceutical industries.(c) 2022 SAAB. Published by Elsevier B.V. All rights reserved.Öğe Content analysis, nanoparticle forming potential and acaricidal effects on Tick (Hyalomma marginatum) of essential oils from two common Thymbra species(Taylor & Francis Ltd, 2024) Kaya, Eda Cavus; Akdeniz, Mehmet; Ugurlu, Pelin; Yener, Ismail; Firat, Mehmet; Ertas, AbdulselamIn this study, the fatty acid, essential oil and aroma composition of Thymbra sintenisii Bornm. & Aznav. subsp. sintenisii Bornm. & Aznav (TSS) and Thymbra sintenisii Bornm. & Azn. subsp. isaurica P.H.Davis (TSI) were determined by GC-MS. The cytotoxic activity was determined with MTT assay and antioxidant activities were determined with DPPH, ABTS, CUPRAC methods. Urease, acetyl, butyryl, angiotensin, alpha-amylase, tyrosinase, elastase, and collagenase enzyme inhibition activities of these species were also determined. The acaricidal effects of essential oils from aerial parts of TSS and TSI on ticks and the nanoparticle formation potential of their essential oils with AgNO3 were determined and compared. The main components of TSS essential oil and aroma were determined as carvacrol and o-cemen (66.78 and 35.44%, respectively), the major components of TSI essential oil and aroma were carvacrol and gamma-terpinene (63.78 and 31.44%, respectively). The species exhibited remarkably high antioxidant activity, particularly in the ABTS and CUPRAC methods. It was also determined that the butyrylcholinesterase and acetylcholinesterase enzyme inhibition activities (Inhibition%: 76.12 +/- 0.83 and 74.13 +/- 0.33, respectively) of the species were quite high. Moderate antimicrobial activity against the bacteria was observed for both essential oils, with MIC values ranging from 312 to 1250 mu g/mL. Moreover, essential oils of these species showed good acaricidal activity on Hyalomma marginatum (LC50: 11.82 mu g/mL for TSS; LC50: 57.64 mu g/mL for TSI). The high antioxidant, anticholinesterase, and acaracidal activities observed in both species are attributed to the presence of carvacrol in their essential oils. The species have potential to be used in food supplements-preservatives, pharmaceutical industry.Öğe A detailed study on chemical and biological profile of nine Euphorbia species from Turkey with chemometric approach: Remarkable cytotoxicity of E-fistulasa and promising tannic acid content of E-eriophora(Elsevier Science Bv, 2018) Yener, Ismail; Olmez, Ozge Tokul; Ertas, Abdulselam; Yilmaz, Mustafa Abdullah; Firat, Mehmet; Kandemir, Sevgi Irtegun; Ozturk, MehmetThe propose of this study is to investigate the chemical constituents of nine Euphorbia species; namely, E. aleppica, E. eriophora, E. macroclada, E. grisophylla, E. seguieriana subsp. seguieriana, E. craspedia, E. denticulata, E. falcata and E. fistulosa by LC-MS/MS as well as their antioxidant, anticholinesterase, tyrosinase inhibitory, urease inhibitory and cytotoxic activities. Among 59 extracts prepared from the different parts of the mentioned Euphorbia species, E. seguieriana subsp. seguieriana leaf (IC50: 10.41 +/- 0.93 mu g/mL) in lipid peroxidation inhibitory by beta-carotene-linoleic acid assay exhibited the highest activity, while E. grisophylla root in DPPH free radical scavenging (IC50: 0.79 +/- 0.01 mu g/mL), E. grisophylla seed in ABTS cation radical scavenging (IC50: 8.93 +/- 0.02 mu g/mL), E. fistulosa root both in acetyl- and butyryl-cholinesterase inhibitory (53.71 +/- 1.89% and 77.63 +/- 0.60% inhibition, respectively), E. denticulata leaf in urease inhibitory (96.89 +/- 2.00% inhibition), and E. macroclada mixed in tyrosinase inhibitory (86.99 +/- 3.77% inhibition) activities. However in cytotoxic activity studies, E. denticulata against PDF fibroblast cell lines (IC50: 23.04 +/- 0.03 mu g/mL), E. craspedia against HT-29 cancer cell line (IC50: 13.74 +/- 0.02 mu g/mL), E. fistulosa against MCF-7 and DLD-1 cancer cell lines (IC50: 14.04 +/- 0.04 mu g/mL and IC50: 20.23 +/- 0.08 mu g/mL, respectively) indicated quite good activity. According to the LC-MS/MS results, these species were rich in quinic acid, malic acid and tannic acid, rutin, hesperidin and hyperoside. Incidentally, it was found that the E. eriophora possessed very strong irritating potential. A chemometric approach using principal component analysis (PCA) and hierarchical clustering analysis (HCA) techniques were also studied on collected data to reveal the relationship between chemical contents of different parts of these Euphorbia species, and their biological activities, together with regional differences. Overall, these species could be suggested as valuable sources of natural-bioactive agents for developing new functional, pharmacological and health promoting ingredients.Öğe Determination of essential oil and biological activities of Hypericum ternatum Poulter and H. scabrum L. species collected from different localities: is H. scabrum an alternative to multifunctional species ST JOHN'S WORT (H. perforatum)?(Tubitak Scientific & Technological Research Council Turkey, 2022) Akdeniz, Mehmet; Yener, Ismail; Irtegun Kandemir, Sevgi; Ozhan Kocakaya, Safak; Firat, Mehmet; Yigitkan, Serkan; Hasimi, NesrinThe importance of Hypericum L. species, being used in traditional medicine, in the scientific world is increasing day by day. Hypericum species are plants that have been used in the treatment of many diseases for a long time and have healing properties. In the current study, the essential oil compositions of Hypericum scabrum L. and H. ternatum Poulter collected from different localities in Turkey were determined by GC-MS/FID. In addition, their antioxidant, cytotoxic, and antimicrobial activities with their enzyme inhibitory potentials (cholinesterase, urease, tyrosinase, elastase, and collagenase) were investigated. Also, in vitro and in silico studies of the major components of the species have been carried out on the studied enzymes. It was determined that four H. scabrum samples mainly contained alpha-pinene (55.99%-62.80%) while three H. ternatum samples contained 2-methyloctane (9.45%-22.39%) and alpha-pinene (12.75%-33.08%). While H. scabrum essential oils possessed significant biological activity potential except for the antimicrobial activity, H. ternatum samples did not. All essential oil samples of H. scabrum exhibited a high cytotoxic effect (IC50 21.67 +/- 0.34 to 34.67 +/- 0 .45 mu g/mL) against colon cancer cell line (HT-29) and indicated higher acetyl-(Inhibiton% 83.30 +/- 1.90 to 93.08 +/- 1.04) and butyryl-cholinesterase (Inhibiton% 80.58 +/- 1.19 to 93.28 +/- 1.99) inhibitory activity than the standard compound, galantamine. Furthermore, all samples of H. scabrum showed high tyrosinase (Inhibiton% 69.00 +/- 1.64 to 95.25 +/- 1.42) and elastase (Inhibiton% 27.58 +/- 0.34 to 36.69 +/- 0.18) inhibitory effects. These biological activity results indicated that H. scabrum essential oil could be used in the cosmetic and pharmaceutical industries.Öğe ESSENTIAL OIL CONTENTS AND BIOLOGICAL ACTIVITIES OF THYMUS CANOVIRIDIS JALAS AND THYMUS SIPYLEUS BOISS.(University of Ankara, 2024) Yi̇Ği̇Tkan, Serkan; Firat, MehmetObjective: Members of the Lamiaceae family are considered to be major sources of bioactive therapeutic agents. Many of them are important medicinal and aromatic plants used in traditional and modern medicine and in the food, cosmetic and pharmaceutical industries. The aim of this study was to investigate in detail the biological activities and chemical composition of the essential oils of Thymus canoviridis Jalas and Thymus sipyleus Boiss. species belonging to the genus Thymus, one of the most important genera of the Lamiaceae family. Material and Method: The essential oil content of the species was determined by GC-MS. Antioxidant activities of the essential oils were determined using lipid peroxidation, DPPH free radical, ABTS cation radical and CUPRAC methods. In addition, cytotoxic activities against breast cancer (MCF-7) and colon cancer (HT-29) cell lines and anticholinesterase (against AChE and BChE enzymes), urease, tyrosinase, elastase, collagenase and angiotensin converting enzyme inhibition activities were determined. Result and Discussion: When the essential oil composition of T. sipyleus was analyzed, the major compounds were 1,8-cineole (eucalyptol) (18.16%), camphor (15.08%) and endo-borneol (11.63%), while T. canoviridis was found to be rich in carvacrol (72.88%). T. canoviridis showed high antioxidant activity in lipid peroxidation (IC50: 45.72±0.12 μg/ml), ABTS (IC50: 6.12±0.03 μg/ml) and CUPRAC (IC50: 5.31±0.01 μg/ml) methods. The selectivities of T. canoviridis and T. sipyleus species against MCF-7 cell line were 4.39 and 6.81, respectively. In the enzyme inhibition studies, both Thymus species showed moderate inhibition activity against BChE enzyme (Inhibition%: 57.88±1.14, 39.21±0.89, respectively). In addition, T. sipyleus showed moderate inhibition of elastase enzyme (Inhibition%: 25.33±0.79). When the results are evaluated in general, it can be said that T. canoviridis essential oil with its rich carvacrol content and high cytotoxic and antioxidant activity can be preferred as a safer and natural option instead of synthetic preservatives in food, pharmaceutical and cosmetic industries to extend shelf life and ensure food safety. © 2024 University of Ankara. All rights reserved.Öğe A GC-MS method validation for quantitative investigation of some chemical markers inSalvia hypargeiaFisch. & CA Mey. of Turkey: Enzyme inhibitory potential of ferruginol(Wiley, 2020) Bakir, Derya; Akdeniz, Mehmet; Ertas, Abdulselam; Yilmaz, Mustafa A.; Yener, Ismail; Firat, Mehmet; Kolak, UfukIn the present study, a GC-MS method used for quantitative screening of 26 compounds (sclareolide, sclareol, ferruginol, cryptanol, 6,7-dehydroroyleanone, suginal, 9,10-dihydro-7,8-dimethyl-2-(1-methylethyl) phenanthren-3-ol, sugiol, inuroyleanone, 12-demethylmulticauline, 7 alpha-hydroxy-beta-sitosterol, stigmasterol, sitosterol, salvigenin, sinensetin,alpha-amyrin, lupeol, lupenone, 3-acetyl lupeol, 1 alpha,21 alpha-dihydroxy-2,3-(1 ' 1 '-dimethyl-dioxymethylene) urs-9(11),12-dien, uvaol, betulin, pyxinol, lup-(20),29-ene-2 alpha-hydroxy-3 beta-acetate, betulin 3 beta, 28 beta-diacetate, 21 alpha-hydroxy,2 alpha,3 beta-diacetoxy urs-9(11),12-dien) specific to TurkishSalviaspecies was developed and validated. According to the GC-MS analysis results,Salvia hypargeiaFisch. & C.A. Mey. roots were found to be rich in ferruginol (30787.97 mu g/g extract) and lupenone (23276.21 mu g/g extract), and leaves in lupeol (20625.92 mu g/g extract). Additionally, the essential oil and aroma contents of this species were identified by GC-MS technique. According to the LC-MS/MS results, especiallyS. hypargeialeaf extract was rich in rosmarinic acid (38035.7 mu g/g extract) and isoquercitrin (4136.91 mu g/g extract). Furthermore, anticholinesterase, antiurease, antityrosinase and antielastase inhibitory, antioxidant, cytotoxic activities of the ethanol extracts, essential oil, and major components of the species were evaluated. Antioxidant potentials of all extracts of this species were quite high in all studied antioxidant methods. Moreover, butyrylcholinesterase and elastase inhibitory capacities of ferruginol, the major component ofS. hypargeiaroots, were notable. For these reasons, this species has a high potential for food and pharmaceutical industries. Practical applications This new GC-MS method was applied toS. hypargeiaFisch. & C.A. Mey. and it indicated that this species possessed high amount of ferruginol and lupeol, and that this species could be used for their natural sources. According to the results of the activity studies (antioxidant, anticholinesterase, tyrosinase, elastase, and cytotoxic), this method was used to exhibit which compound may be responsible for the activities. This developed and validated method could be easily applied to determine major/active/toxic secondary metabolites ofSalviaspecies which are used and/or could be used in pharmaceutical, cosmetic, and food industries.Öğe LC-MS/MS Analysis and Biological Activities of Different Parts of Ziziphora capitata L.(Kahramanmaras Sutcu Imam Univ Rektorlugu, 2024) Yigitkan, Serkan; Cavusoglu, Mehmet; Caglayan, Mehmet Veysi; Yener, Ismail; Firat, Mehmet; Cavus Kaya, Eda; Yilmaz, Mustafa AbdulahThe Ziziphora species, classified under the Lamiaceae family, have a strong aromatic property. Ziziphora species have been used in folk medicine as sedative, gastric, aphrodisiac, bloating, and degassing. In the current study, the phenolic and flavanoid content of ethanol extracts of Ziziphora capitata L. species of flower, leaf, branch, mixed, and root parts was determined by the LC-MS/MS device. In addition, the antioxidant and cytotoxic activities of the extracts, as well as their inhibitory effects on enzymes (antihypertensive, AchE (acetylcholinesterase), BchE ( butyrylcholinesterase), elastase, tyrosinase, collagenase and urease), were determined. The LC-MS/MS results showed that quinic acid (25578, 5842, 25171, 14055, 10597 mu g g-1, respectively) was found in higher amounts in flower, leaf, branch, mixed, and root extracts of Z. capitata species compared to other components. Additionally, rosmarinic acid (17097 mu g g-1), cynaroside (8432), and hesperidin (8067) were found to be major components. It was observed that the flower extract of the species exhibited strong antioxidant activity (IC50: 37.18 +/- 1.36 mu g mL-1, 9.89 +/- 0.45, A0.5:16.27 +/- 0.02, respectively) in DPPH, ABTS and CUPRAC methods. It was concluded that the leaf extract of Z. capitata species had a strong cytotoxic effect on HT-29 (colon cancer cell line) (viability %: 9.26 +/- 0.69). It was observed that the root part of the species exhibited higher activity in butyrylcholinesterase (BChE) enzyme inhibition activity (inhibition %: 40.56 +/- 0.88) than other parts. It was determined that Z. capitata extracts did not show acetylcholinesterase, urease, tyrosinase, elastase, collagenase, and antihypertensive enzyme activity or showed low activity. As a result, it is thought that the flower extract of the Z. capitata species has better results in terms of the examined parameters, whereas the leaf extract needs to be subjected to more detailed in vitro and in vivo research conducted to be used in the pharmaceutical industry as a result of its cytotoxic effect against colon cancer cell lines.Öğe Method validation of 15 phytochemicals inHypericum lysimachioidesvar.spathulatumby LC-MS/MS, and fatty acid, essential oil, and aroma profiles with biological activities(Springer, 2020) Akdeniz, Mehmet; Yilmaz, Mustafa Abdullah; Ertas, Abdulselam; Yener, Ismail; Firat, Mehmet; Aydin, Firat; Kolak, UfukThe aim of the present study was to develop and validate a LC-MS/MS method for quantification of 15 phytochemicals inHypericumspecies. The developed method was fully validated in terms of repeatability (inter-day and intra-day precision), limits of detection and quantification, linearity, recovery and relative standard uncertainty. The developed and validated LC-MS/MS method was applied to determine 15 phytochemicals in the ethanol extracts ofH. lysimachioidesvar.spathulatumaerial parts (HLS-A) and roots (HLS-R). Hyperoside was found to be the major compound in HLS-A and HLS-R ethanol extracts (16,560.3 and 3561.6 mu g analyte/g extract, respectively). According to the results of GC-MS analyses,cis-13,16-docosadienoic acid (35.0%), caryophyllene oxide (24.33%) and undecane (28.21%) were determined as the major components in fatty acid, essential oil and aroma compositions ofH. lysimachioidesvar.spathulatum, respectively. HLS-A and HLS-R ethanol extracts showed moderate activity in ABTS cation radical decolorization assay. The major components (hyperoside, astragalin, and quercetin) present in HLS-A and HLS-R ethanol extracts were found to have also the highest antioxidant effect in ABTS cation radical scavenging method. The extracts, main constituents in the extracts and essential oil had no toxic-cytotoxic potential against PDF, MCF-7 and HT-29 cell lines. HLS-A ethanol extract and essential oil exhibited high butyrylcholinesterase inhibitory activity. Quercetin showed the highest inhibitory effect against acetyl- and butyryl-cholinesterase, urease and tyrosinase among the tested samples. According to biological activity studies,H. lysimachioidesvar.spathulatumand their major components might be promoted as promising sources of natural agents and used in the development of nutraceuticals, functional food ingredients and pharmaceutical industry.Öğe Phytochemical and biological investigations on two Nepeta species: Nepeta heliotropifolia and N. congesta subsp. cryptantha(Wiley, 2020) Akdeniz, Mehmet; Ertas, Abdulselam; Yener, Ismail; Firat, Mehmet; Kolak, UfukIn the present study, the essential oil and aroma compositions of Nepeta heliotropifolia (NH) and N. congesta subsp. cryptantha (NC) were determined by gas chromatography-mass spectrometry (GC-MS) and gas chromatography-flame ionization detector (GC/FID), and their phenolic compounds by liquid chromatography-tandem mass spectrometry (LC-MS/MS). In addition, antioxidant, cytotoxic, anticholinesterase, urease, and tyrosinase activities of essential oils obtained from NH and NC aerial parts and ethanol extracts prepared from different parts of NH and NC were investigated. The major constituent of water-distilled essential oils was found to be germacrene D (36.7% and 38.5%, respectively), and their main aroma component was eucalyptol (48.0% and 24.7%, respectively). Among the studied parts of NH and NC, their flowers extracts were found to be the richest in phenolic compounds and in which the most abundant compound was rosmarinic acid (8,909.91 and 4,317.20 mu g/g, respectively). NH and NC flower extracts exhibited also strong antioxidant activity in DPPH, ABTS, and CUPRAC assays. Among the tested samples, NH essential oil indicated the best cytotoxic effect against PDF, HT-29, and MCF-7 (IC50 52.34, 25.89, and 44.70 mu g/ml, respectively), and the highest butyrylcholinesterase (77.21 +/- 1.12% inhibition) and moderate acetylcholinesterase (41.36 +/- 0.69% inhibition) inhibitory activities. Practical applications This is the first report on the essential oil and aroma compositions, the phenolic compounds, the antioxidant with total phenolic and flavonoid contents, cytotoxic, anticholinesterase, urease, and tyrosinase activities of Nepeta heliotropifolia and N. congesta subsp. cryptantha, except for their essential oil compositions. The reported results suggested that Nepeta heliotropifolia and N. congesta subsp. cryptantha flowers being rich in rosmarinic acid and having strong antioxidant potential, and NH essential oil possessing significant cytotoxic and butyrylcholinesterase inhibitory effect could be source for nutraceutical, food, and drug industries.Öğe Trace Element Analysis by ICP-MS and Chemometric Approach in Some Euphorbia Species: Potential to become a Biomonitor(Shaheed Beheshti Univ, Sch Pharmacy, 2019) Yener, Ismail; Temel, Hamdi; Tokul-Olmez, Ozge; Firat, Mehmet; Oral, Elif Varhan; Akdeniz, Mehmet; Senturk, KeremIn this study, the branch, leaves, flowers, roots and mixed parts of different nine Euphorbia species were analyzed for their trace element contents by using ICP-MS. The samples were digested by concentrated nitric acid and hydrogen peroxide in a microwave by ICP-MS before the analysis. The accuracy and precision of the method was evaluated by CRM 1573a Tomato Leaves. Trace element contents accumulated in different parts of each sample were contrasted. Minitab Statistical Software Inc., programme was used for the multivariate analysis of 12 toxic metals of seeds, roots, branches, leaves, flowers, and mixed parts of Euphorbia species collected from Diyarbakir, Kayseri, Malatya, Mardi'', Trabzon, and Van cities.When the studied Euphorbia species are compared in terms of their metal contents; V, Tl, Cr, and Ni metals in E. eriophora, Ba in E. aleppica, As and Co metals in E. segtieriana, Ag and Se metals in E. craspedia, Cu and Cd metals in E. fistulosa, Cs and Pb metals in E. grisophylla, Zn in E. macroclada and also Rb and Sr metals in E. denticulata were determined higher. It was determined that the studied species accumulated some metals at highly amounts especially in the root and leaf parts. In general, it can be said that Euphorbia species have high potential to become a biomonitor. For this reason, it can be predicted that these species will be used as ornamental plants in landscape architecture due to both their toxic metals retention properties and their beautiful appearance.Öğe Trace Elemental Analysis of Allium Species by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) with Multivariate Chemometrics(Taylor & Francis Inc, 2019) Oral, Elif Varhan; Tokul-Olmez, Ozge; Yener, Ismail; Firat, Mehmet; Tunay, Zeki; Terzioglu, Pinar; Aydin, FiratAerial parts and roots of the 12 Allium species collected from five localities of Turkey were studied for trace elements (Ag, As, Cd, Co, Cr, Cu, Ni, Pb, Se, Tl, V, and Zn) using inductively coupled plasma mass spectrometry (ICP-MS). A tomato leaves certified reference material was used to characterize the accuracy and precision of the analysis. Each Allium species contained Se (315-2740 mu g/kg), Tl (2.75-71 mu g/kg), V (77-6790 mu g/kg), and Zn (3.73-26.6 mg/kg) which can meet the necessary daily intake of these minerals. In addition, chemometric analyses were performed using correlation analysis, principal component analysis, and hierarchical cluster analysis to determine the association of 12 trace elements in the Allium species. Using chemometrics, the distribution of elements between aerial parts and roots, and geographic collection localities of Allium species were also examined. This study is important the consumers because of the wide consumption of Allium species. This report is the first detailed characterization of the metal content of Allium species.
