Browsing by Author "Oral, Elif Varhan"
Now showing items 1-16 of 16
-
Anoxybacillus sp. SO B1-Immobilized Amberlite XAD-16 for Solid-Phase Preconcentration of Cu(II) and Pb(II) and Their Determinations by Flame Atomic Absorption Spectrometry
Oral, Elif Varhan; Ozdemir, Sadin; Dolak, Ibrahim; Okumus, Veysi; Dundar, Abdurrahman; Ziyadanogullari, Berrin; Aksoy, Zehra (Taylor & Francis Inc, 2015)A new method for the determination of Cu(II) and Pb(II) by flame atomic absorption spectrometry (FAAS) after preconcentrating on a column containing Anoxybacillus sp. SO B1-immobilized Amberlite XAD-16 was developed. The ... -
Chemical Profile of Malva Neglecta and Malvella Sherardiana by LC-MS/MS, GC/MS and Their Anticholinesterase, Antimicrobial and Antioxidant Properties With Aflatoxin-Contents
Hasimi, Nesrin; Ertas, Abdulselam; Oral, Elif Varhan; Yener, Ismail; Alkan, Huseyin; Boga, Mehmet; Yilmaz, Mustafa Abdullah (Marmara Univ, Fac Pharmacy, 2017)The purpose of the present work was to determine the phenolic and the fatty acids profiles by LC-MS/MS and GC/MS with their antioxidant, anticholinesterase and antimicrobial activities, and aflatoxin contents of Malva ... -
Comparison of Methods for the Preconcentration of Cadmium (II) Using Amberlite XAD-16 Resin Modified with Anoxybacillus caldiproteolyticus and Geobacillus stearothermophilus as Novel Biosorbents
Enez, Baris; Oral, Elif Varhan; Fincan, Sema Aguloglu; Ziyadanogullari, Berrin (Taylor & Francis Inc, 2020)The isolation, identification and characterization of bacteria obtained from soil of Ergani Makam Mountain were performed and the results revealed that the bacteria were thermophilic Anoxybacillus caldiproteolyticus. The ... -
Comparison of Modified Tessier and Revised BCR Sequential Extraction Procedures for the Fractionation of Heavy Metals in Malachite Ore Samples Using ICP-OES
Oral, Elif Varhan (Atomic Spectroscopy Press Ltd, 2019)In this study, two sequential extraction procedures (modified Tessier procedure and revised BCR procedure) were applied for the decomposition of Fe, Cu, Co, Pb, Zn, and Mn in the structure of malachite ore from the Keban ... -
Comparison of Two Sequential Extraction Procedures for Trace Metal Partitioning in Ore Samples From the Keban Region in Elazig, Turkey
Oral, Elif Varhan (Atomic Spectroscopy Press Ltd, 2018)The objective of this research was to compare two sequential extraction procedures, modified Tessier and revised BCR, for the fractionation study of Fe, Cu, Co, Pb, Zn, and Mn in ore samples obtained from the Keban Region, ... -
Complexation and transport of amino acid esters and their salts with synthesised chiral novel aza crown ether derivatives
Kazaylek, Mehmet; Kocakaya, Safak Ozhan; Oral, Elif Varhan; Colak, Mehmet; Karakaplan, Mehmet (Taylor & Francis Ltd, 2014)The syntheses of four aza-15-crown-5 ethers bearing phenyl and phenoxymethyl moieties attached to a stereogenic centre on the crown ring were achieved. Macrocycles have exhibited strong binding ability (K-a=5364-12,969M(-1)) ... -
Diyarbakır aktarlarında satılan bazı tıbbi bitkilerdeki As, Cd, Hg ve Pb elementlerinin ICP-MS ile tayini
Tekin, Erdem (Dicle Üniversitesi, Sağlık Bilimleri Enstitüsü, 2019)Amaç: Ülkemizin birçok bölgesinde yetişen tıbbi bitkiler sağlık açısından önemli bir yere sahiptir. Bu çalışmada amacımız, Diyarbakır aktarlarında satılan kırkkilit otu, hatmi, ayva yaprağı, ada çayı, biberiye, ısırgan ... -
Labiatae familyasına özgü yaygın bazı türlerin uçucu yağ bileşenlerinin gc-ms ile miktar tayini, metot validasyonu ve analizi
Üstün, Sedat (Dicle Üniversitesi, Sağlık Bilimleri Enstitüsü, 2022)Amaç: Bu tez çalışmasında, Türkiye'nin Doğu ve Güneydoğu Anadolu bölgesinden toplanan ve halk arasında yaygın bir şekilde çay ve baharat olarak kullanılan bazı türlerin Clevenger aparatı ile uçucu yağları hazırlanmıştır. ... -
A new method for preconcentration of Th(IV) and Ce(III) by thermophilic Anoxybacillus flavithermus immobilized on Amberlite XAD-16 resin as a novel biosorbent
Yener, Ismail; Oral, Elif Varhan; Dolak, Ibrahim; Ozdemir, Sadin; Ziyadanogullari, Recep (Elsevier Science Bv, 2017)A novel approach has been improved for the preconcentration of Th(IV) and Ce(III) by using thermophilic Anoxybacillus flavithermus which were immobilized on Amberlite XAD-16 resin and analyzed by Inductively Coupled ... -
Nutritional composition of potato (Solanum tuberosum L.) Haulms
Kaplan, Mahmut; Ulger, Ismail; Kokten, Kagan; Uzun, Sati; Oral, Elif Varhan; Ozaktan, Hamdi; Temizgul, Ridvan (Mattioli 1885, 2018)The present study was conducted to investigate the nutritional composition of the haulms of commonly grown 5 potato (Solanum tuberosum L.) cultivars (Milva, Laura, Granola, Europrima and Jelly). Plant materials were harvested ... -
Phytochemical profile and some biological activities of three Centaurea species from Turkey
Boga, Mehmet; Alkan, Huseyin; Ertas, Abdulselam; Oral, Elif Varhan; Yilmaz, Mustafa A.; Yesil, Yeter; Goren, Ahmet C. (Pharmacotherapy Group, 2016)Purpose: To characterise the phytochemical profile of whole plants of Centaurea balsamita, C. depressa and C. lycopifolia with LC-ESI-MS/MS, and as well as their antioxidant, anticholinesterase and antimicrobial activities. ... -
Selective in vitro and in silico enzymes inhibitory activities of phenolic acids and flavonoids of food plants: Relations with oxidative stress
Yener, Ismail; Kocakaya, Safak Ozhan; Ertas, Abdulselam; Erhan, Bahadir; Kaplaner, Erhan; Oral, Elif Varhan; Yilmaz-Ozden, Tugba (Elsevier Sci Ltd, 2020)In this study, the inhibitory potentials of food originated 34 phenolic acids, and flavonoid compounds were screened against acetylcholinesterase, butyrylcholinesterase, urease, and tyrosinase enzymes. All compounds included ... -
Selective in-vitro Enzymes' Inhibitory Activities of Fingerprints Compounds of Salvia Species and Molecular Docking Simulations
Kocakaya, Safak Ozhan; Ertas, Abdulselam; Yener, Ismail; Ercan, Bahadir; Oral, Elif Varhan; Akdeniz, Mehmet; Kaplaner, Erhan (Shaheed Beheshti Univ, Sch Pharmacy, 2020)Recently Nutrition and Food Chemistry researches have been focused on plants and their products or their secondary metabolites having anti-alzheimer, anti-cancer, anti-aging, and antioxidant properties. Among these plants ... -
Trace Element Analysis by ICP-MS and Chemometric Approach in Some Euphorbia Species: Potential to become a Biomonitor
Yener, Ismail; Temel, Hamdi; Tokul-Olmez, Ozge; Firat, Mehmet; Oral, Elif Varhan; Akdeniz, Mehmet; Senturk, Kerem (Shaheed Beheshti Univ, Sch Pharmacy, 2019)In 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 ... -
Trace element analysis in some salvia species by inductively coupled plasma-mass spectrometry (Icp-ms) and chemometric approach
Tunay, Zeki; Yener, İsmail; Oral, Elif Varhan; Demirkoz, Aslı Barla; Ölmez, Özge Tokul; Fırat, Mehmet; Öztürk, Mehmet; Aydın, Işıl; Aydın, Fırat; Ertaş, Abdülselam (Marmara University, 2020)In this study, the stems, leaves, flowers, roots and mixed all parts of five Salvia species were analyzed for their trace element (Li, Be, V, Cr, Co, Ni, Cu, Zn, As, Se, Rb, Sr, Ag, Cd, Cs, Ba, Hg, Tl, Pb, and U) contents ... -
Trace Elemental Analysis of Allium Species by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) with Multivariate Chemometrics
Oral, Elif Varhan; Tokul-Olmez, Ozge; Yener, Ismail; Firat, Mehmet; Tunay, Zeki; Terzioglu, Pinar; Aydin, Firat (Taylor & Francis Inc, 2019)Aerial 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 ...
