Browsing by Author "Duz, M. Zahir"
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Alkali catalyzed transesterification of safflower seed oil assisted by microwave irradiation
Duz, M. Zahir; Saydut, Abdurrahman; Ozturk, Gulsen (Elsevier, 2011)The safflower (Carthamus tinctorius L) oil was extracted from the seeds of the safflower that grows in Diyarbakir, SE Anatolia of Turkey. Biodiesel has been prepared from safflower seed by transesterification of the crude ... -
Assessment of the Relationship Between Humic Acid Contents and Trace Elements of Some Agricultural Soils in Diyarbakır Region by Multivariate Statistical Methods
Duzgun, Mehmet; Eren, Abdullah; Bilge, Ugur; Ceylan, Ramazan; Selcuk, Ramazan; Duz, M. Zahir (Kahramanmaras Sutcu Imam Univ Rektorlugu, 2024)There are important relationships between humic acid (HA) and the bioavailability, reactions and mobility of trace elements in the soil. For this reason, soils are tried to be improved chemically, biologically and physically ... -
Chemical fractionation of nickel in asphaltite based bottom ash
Aydin, Isil; Aydin, Firat; Kilinc, Ersin; Duz, M. Zahir; Hamamci, Candan (Taylor & Francis Ltd, 2013)Asphaltite, originating from petroleum, contains many kinds of mineral elements derived from its generation. These elements exist in different forms which may change throughout the asphaltite combustion process. Chemical ... -
Cloud Point Extraction As a Preconcentration Step for Flame Atomic Absorption Spectrometric Determination of Pb
Kilinc, Ersin; Aydin, Firat; Duz, M. Zahir (Atomic Spectroscopy Press Ltd, 2012)Cloud point extraction was employed as a pre-concentration method for the determination Of trace amounts of lead (Pb) after formation of a complex with (4-(2-pyridyi-azo)-resorcinol) (PAR) and later analysis by flame atomic ... -
Desulfurization and demineralization of asphaltite using combination of froth flotation and aqueous caustic leaching
Saydut, Abdurrahman; Duz, M. Zahir; Aydin, Isil; Hamamci, Candan (Sage Publications Inc, 2008)The mineral matter and Sulfur, which are present in varying amounts in asphaltites, are a major problem in utilization of asphaltites as a fuel. The effect of leaching asphaltites from Simak and Silopi, SE Anatolia, Turkey, ... -
Geochemical Multi-element ICP-OES Analysis of Borehole Waters from SE Anatolia
Duz, M. Zahir; Sagirdag, Mehmet; Celik, Kadir Serdar; Hasan, Mahmood A.; Kilinc, Ersin (Atomic Spectroscopy Press Ltd, 2016)Water supply from boreholes is today used by people from rural areas of Turkey more commonly due to the reduction of available surface water. For this reason, the concentrations of Al, As, B, Be, Ca, Cd, Co, Cr, Fe, Hg, ... -
ICP-OES Multi-element Analysis of Wheat Grown in Southeastern Turkey
Duz, M. Zahir; Duzgun, Mehmet; Cam, Belgizar; Celik, K. Serdar; Kilinc, Ersin (Atomic Spectroscopy Press Ltd, 2017)The bread and durum wheat varieties grown in Southeastern Turkey are the main source of food consumed by the Turkish population and serve as bread and pasta. In this study, 12 kinds of durum wheat and 5 kinds of bread wheat ... -
Major and Trace Element Contamination of Short-Term Snow Cover During and After a Dust Storm and Analysis by ICP-OES
Akba, Osman; Kilinc, Ersin; Aydin, Isil; Erdogan, Sait; Aydin, Firat; Duz, M. Zahir; Hamamci, Candan (Atomic Spectroscopy Press Ltd, 2013)The levels of major and trace elements are key data for evaluating the toxicity of potential particulate matter and for identifying pollution sources. From this point of view, snow is considered an ideal matrix to observe ... -
Microwave assisted transesterification of maize (Zea mays L.) oil as a biodiesel fuel
Ozturk, Gulsen; Kafadar, Aylin Beycar; Duz, M. Zahir; Saydut, Abdurrahman; Hamamci, Candan (Sage Publications Inc, 2010)Maize (Zea mays L.) oil is a highly valuable agricultural commodity for the Turkey. Transesterified maize oil has the global better properties because it has the greater monounsaturated content. Biodiesel has been prepared ... -
Microwave Digestion Followed by ICP-OES for the Determination of Al, Cd, Cr, Cu, Fe, Ni, Pb, and Sn in Maize
Duz, M. Zahir; Celik, K. Serdar; Aydin, Isil; Erdogan, Sait; Aydin, Firat; Hamamci, Candan (Atomic Spectroscopy Press Ltd, 2012)Maize (Zea mays L.) is currently the most widely grown crop in the world and is used not only for food and animal feed but also to produce industrial starches, biodiesel, ethanol, and oils. The present work reports the ... -
Removal of sulfur and ash from coal using molten caustic leaching, a case study from Hazro fields, Turkey
Duz, M. Zahir; Saydut, Abdurrahman; Erdogan, Sait; Hamamci, Candan (Sage Publications Inc, 2009)Molten caustic leaching process is effective in reducing significant amount of ash derived from minerals, pyritic sulfur, and organic sulfur from coal. The effect of leaching coal samples from Hazro fields, situated in ... -
Separation of liquid fractions obtained from flash pyrolysis of asphaltite
Saydut, Abdurrahman; Duz, M. Zahir; Tonbul, Yalcin; Baysal, Akin; Hamamci, Candan (Elsevier, 2008)The experiments on the flash pyrolysis of asphaltite (Avgamasya, Sirnak, SE Anatolia, Turkey) were carried out in a fixed bed reactor as a basic study. The investigation focused on the effects of pyrolysis temperature and ... -
Simultaneous Determination of Transition Metals in Hazelnuts (Corylus avellana L.) by ICP-OES
Celik, K. Serdar; Aydin, Firat; Duz, M. Zahir; Aydin, Isil; Erdogan, Sait; Akba, Osman; Hamamci, Candan (Atomic Spectroscopy Press Ltd, 2014)Heavy metal concentrations in foods are of interest because of their essential or toxic nature. The present work reports the results obtained for the simultaneous determination of essential and/or toxic metals (Cd, Co, Cr, ... -
Simultaneous High-Performance Thin-Layer Chromatographic Determination of Indole Acetic Acid, Indole Butyric Acid, and Absisic Acid in in vitro Seedling of Watermelon Exposed to Heavy Metals
Kilinc, Ersin; Okumus, Veysi; Duz, M. Zahir; Aydin, Firat (Springer Heidelberg, 2012)A new method based on the use of high-performance thin-layer chromatography (HPTLC) was developed for the simultaneous determination of the plant growth hormones, indole acetic acid, indole butyric acid, and absisic acid ... -
Simultaneous Multielement Determination of Al, As, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb, Sn, and Zn in Bulgur Wheat by ICP-OES
Erdogan, Sait; Aydin, Isil; Duz, M. Zahir; Aydin, Firat; Celik, K. Serdar; Akba, Osman; Hamamci, Candan (Atomic Spectroscopy Press Ltd, 2015)Bulgur is one of the oldest cereal-based foods. This study explains the simultaneous determination by the proposed method for toxic elements such as Al, As, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb, Sn, and Zn in bulgur by ICP-OES ... -
Transesterified sesame (Sesamum indicum L.) seed oil as a biodiesel fuel
Saydut, Abdurrahman; Duz, M. Zahir; Kaya, Canan; Kafadar, Aylin Beycar; Hamamci, Candan (Elsevier Sci Ltd, 2008)The sesame (Sesamum indicum L.) oil was extracted from the seeds of the sesame that grows in Diyarbakir, SE Anatolia of Turkey. Sesame seed oil was obtained in 58 wt/wt'Y(,, by traditional solvent extraction. The methylester ...
