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September 2018 - November 2018
April 1994 - March 1995
November 2006 - present
Publications
Publications (63)
In the current investigation, total phenolics and flavonoids of the methanolic extract obtained from the trunk bark of Acacia cyanophylla Lindl. were quantified by LC–HRMS technique. DPPH and ABTS reagents were employed to assay the antioxidant potential. The anti‐tyrosinase and anti‐α‐amylase potentials were also assayed. The findings revealed tha...
The aim of this study was to analyze the phytochemical profile of Acacia cyclops trunk bark ethyl acetate extract using LC–tandem mass spectrometry for the first time, along with evaluating its antioxidant and anti‐tyrosinase properties. Consequently, we determined the total phenolic and flavonoid contents of the extract under investigation and ide...
The aim of this study was to provide a chemical profile and determine the antioxidant and antimicrobial activity of the essential oil (EO) and lipid extracts of Thymus serpyllum L. herbal dust obtained via conventional (hydrodistillation (HD) and Soxhlet extraction (SOX)) and novel extraction techniques (supercritical fluid extraction (SFE)). In ad...
The aim of this work was to investigate the microwave-assisted extraction (MAE) kinetics of polyphenolic compounds from organic peppermint leaves. The phytochemicals of peppermint (Mentha piperita L.) are increasingly used in food technology due to their numerous biological activities. The processing of various plant materials by MAE and the produc...
The phenolic profile of ethyl acetate and methanol extracts from the trunk bark of Pinus pinea growing in Tunisia was determined using Liquid Chromatography coupled to High Resolution Mass Spectrometry (LC-HRMS) method and their anti-α-amylase potential and the mode of inhibition were determined in a kinetic study. Methanol extract was found to be...
Microcapsules containing probiotic culture mixture (Lactobacillus casei + Bifidobacterium longum) (1%), 1% sodium alginate, 2% fructooligosaccharide, 2% inulin were prepared. Symbiotic white cheese was obtained by adding free and microencapsulated probiotic bacteria and prebiotics to goat milk. The ripening biochemistry of the cheeses during 180 da...
The aim of this study was to valorize Thymus serpyllum L. herbal dust, the particular fraction distinguished as industrial waste from filter-tea production. This work demonstrated comparable analysis considering model fitting, influence analysis and optimization of microwave-assisted extraction (MAE) of bioactive compounds from the aforementioned h...
This paper is to exhibit validation studies of developed analytical method for the simultaneous determination of 168 micropollutants including pharmaceuticals and several pesticides in surface water and wastewater samples with direct injection using jet stream ESI LC-MS/MS. Method development in the LC-MS/MS system was carried out to determine the...
The main goal of this study was to valorize Thymus serpyllum L., the by-product of filter-tea production, for extraction of polyphenols with high antioxidant capacity by ultrasound-assisted extraction (UAE). Herbal dust is formed during the preparation of raw material for tea packaging, it is separated as a fraction which is unusable in the tea ind...
In this study, synbiotic goat cheese was obtained by adding free and microencapsulated probiotic bacteria and prebiotics to goat milk. Three types of microcapsules containing Lacticaseibacillus casei and Bifidobacterium longum, fructooligosaccharide and inulin were obtained and these microcapsules were added during the cheese production process. In...
The aim of this study was to valorize Thymus serpyllum herbal dust, a particular fraction distinguished as an industrial waste from filter-tea production. Pressurized liquid extraction (PLE) was used with the aim of overcoming certain obstacles of conventional extraction techniques in terms of shortening extraction time, reducing solvent consumptio...
In the study, the microencapsulation method was applied in the production of white cheese from goat milk to prevent the loss of viability of Lactobacillus paracasei and Bifidobacterium longum due to environmental factors during their storage period. For this purpose, the cheese was obtained using three types of microcapsules - symbiotic microcapsul...
The muscle tissues of a total 154 sampled eels from the Asi (Orontes) River were analyzed between January and December 2018 to determine the content of heavy metals (Hg, Pb, Cd and As). Determination of heavy metals in muscle tissue was carried out with an Inductively Coupled Plasma Mass Spectrometer (ICP‐MS). To express the risk level for human co...
The method of microencapsulation has been performed on the probiotic microorganisms (Lactobacillus paracasei and Bifidobacterium longum), which are used in conjunction with the starter cultures in white cheese production from goat‘s milk. For this purpose, 3 types of microcapsules, namely, one containing the probiotic bacteria and another symbiotic...
CBRN Protective Clothing: New Technologies and Chemical Protection Tests
CBRN Protective Clothing: New Technologies and Chemical Protection Tests
The share of Bluefin Tuna (BFT) has gained in importance in world fishing and trade for the last 50 years. Particularly in the Mediterranean region, this capture-based aquaculture (farming and fattening) activity has reached an important potential. This study examined the effects of toxic metals and omega-3 fatty acids from BFT fish captured in the...
The Marmara Sea is a semi closed fishing area in Turkey and has valuable fish species such as the
common sole, black scorpionfish and horse mackerel. Domestic waste, generated by the population
of over 25 million living in the coastal zone as well as industrial facilities in the region are the
main causes of pollution in the Marmara Sea. In the cur...
Microwave-assisted extraction (MAE) of natural resources was the focus of investigation for great number of researches recently, however great potential of this technique is still not fully utilized. The aim of this work was evaluation of MAE parameters (ethanol concentration, extraction time and liquid-solid ratio) on total polyphenols yield (TP)...
The original version of this article unfortunately contained mistakes. Under section, ‘Estimated Weekly Intake (EWI),’ the value 150 g should be corrected as 100 g in the sentences ‘The weekly consumption value for fish…’ and ‘where WFC is the weekly fish consumption …’. Likewise under section, ‘Target Hazard Quotient (THQ),’ the data (21.43 g/pers...
Propolis is a resinous bee hive product that has many biological activities. In this study, a total of 11 raw propolis samples were collected from various geographical areas in Turkey. Phenolic compounds were extracted from all samples and analyses of total phenolics and flavonoids and total antioxidant capacities were performed. All the samples sh...
This chapter provides state-of-the-art overviews on foodborne diseases caused by Grayanotoxins (GTXs) in relation to their etiology, biology, epidemiology, clinical presentation, pathogenesis, diagnosis, treatment, and prevention. GTXs are a group of toxic compounds classified as polyhydroxylated cyclic diterpenes. GTXs, also known as andromedotoxi...
Palynological spectrum, proximate and fattyacid (FA) composition of eight bee bread samples of different botanical origins were examined and significant variations were observed. The samples were all identified as monofloral, namely Castanea sativa (94.4 %), Trifolium spp. (85.6 %), Gossypium hirsutum (66.2 %), Citrus spp. (61.4 %) and Helianthus a...
The objective of this study was to assess the effects of different extraction parameters on Satureja montana subcritical water extraction process, in terms of total phenols, total flavonoids and antioxidant activity of extracts (expressed as IC50 value) by employing response surface methodology. The most efficient extraction conditions for all thre...
TÜBİTAK Marmara Research Centre, Food Institute, 41470, Kocaeli, Turkiye
Veterinary drugs are widely used in livestock to treat disease, maintain animal health, promote growth, and improve meat quality and yield. The use of these drugs may leave residues in the food. Foods containing the residues may cause adverse health effects in humans. Therefore, government regulatory authorities control the use of veterinary drugs...
Veterinary drugs are used for disease treatment and prevention and also for improvement of growth and feeding efficiency. Incorrect use of these drugs may cause accumulation of such drugs in the animal body and intake by human. Therefore they should be checked to protect the agricultural environment and food industry Since there are many veterinary...
ABSTRACT (Oral Presentation)
This study was the first phytochemical and biological activity report on Alcea pallida and Alcea apterocarpa extracts. The main constituents of the essential oils were identified as arachidic acid (34.2%) for A. pallida, and hexatriacontane (25.3%) for A. apterocarpa. The main constituents of the fatty acids obtained from petroleum ether extracts o...
Chemical composition of Anatolian propolis
A rapid and simple LC–MS/MS method was developed and optimized for screening and confirmation of triphenylmethane dyes including malachite green (MG), leucomalachite green (LMG), crystal violet (CV), leucocrystal violet (LCV) and brilliant green (BG) in fish muscle with skin. Leucocrystal violet D6 (LCV-D6) and leucomalachite green-D5 (LMG D5) was...
A simple and rugged method of analysis for grayanotoxins I and III in honey using liquid chromatography triple quadrupole mass spectrometry with electrospray ionization was developed. This paper describes the first LC-MS/MS method for the quantitation and confirmation of the grayanotoxins in honey using "dilute-and-shoot" sample preparation approac...
In this study, veterinary drugs, polychlorinated biphenyls (PCBs) and organochlorine pesticide (OCP) residues, colour, texture profile, nutritional value, and chemical composition of sea bass and sea bream cultured in Turkey were examined. The levels of veterinary drug residue, PCB, OCP and heavy metal concentrations found in sea bass and sea bream...
Propolis, a resinous substance collected by honey bees contains hundreds of compounds belonging various chemical groups including flavonoids, aromatic acid and esthers, aldehydes and ketones, terpenoids and phenylpropanoids, aminoacids, vitamins. This valuable bee product has many beneficial therapeutic properties such as antiviral, antiseptic, ant...
Applications of Liquid Chromatography-Mass Spectrometry in Food Residue Analyses
Sea bass (Dicentrarchus labrax) fish fillets (scaly, descaled and skinned) were marinated in a solution composed of 2.5% acetic acid and 11% sodium chloride and stored at + 4 (±1)°C. Chemical and sensory attributes of the marinated sea bass fillets were monitored during the storage period of 90 days. According to sensory analysis results, only the...
simultaneous determination of additives in soft drinks
Ege ve Marmara Bölgesi Su Ürünleri İşleme Tesislerinin Mevcut Durumu ve Hijyen Uygulamaları. Bu çalışma, Türkiye su ürünleri ihracat ve üretiminin büyük bir kısmını elinde bulunduran Ege ve Marmara Bölgesi’ nde su ürünleri işleyen 25 adet tesisin (toplam 10 il) üretim ve hijyen durumlarının tespit edilmesi amacıyla yapılmıştır. Çalışma sonucunda el...
Sanayi Devrimi’nden sonra tarımda makineleşme ve suni gübre kullanımının yaygınlaşması ile birlikte birim alandan daha fazla ürün elde edilmeye başlandı. Daha fazla ürün elde etmek için yapılan hem geleneksel hem de yoğun tarım uygulamaları zamanla toprağın besleme gücünü ve bitkilerin zararlılara karşı dayanıklılığını azalttı. Ürünlerin ortaya çık...
High performance liquid chromatography (HPLC) and supercritical fluid chromatography (SFC) analyses are used to show that supercritical fluid extraction (SFE) using carbon dioxide is an effective means of extracting a range of components from feverfew samples. It was found that the specific compositions of solvent extracts and SFE extracts are diff...
Five new hybrids (T. Kolon, H190, H260, H262, H580) of Turkish hazelnut varieties were evaluated in terms of total oil, fatty acid composition, α-tocopherol, unsaturated/saturated ratio, stability index and mineral in comparison with five commercial Turkish hazelnut varieties (Tombul, Palaz, Mincane, Foşa and Çakıldak). Significant differences in t...
The aim of the study presented here was to find out the effects of storage at -30°C on fatty acids in fish oil, without adding antioxidants. Oils of sardines from the Sea of Marmara were extracted, analysed and stored at +4°C for 4 and 8 days, and thereafter at -30°C for 24 months. Fatty acid composition analyses were performed initially and after...
The aim of the study presented here was to find out the effects of storage at -30 degrees C on fatty acids in fish oil, without adding antioxidants. Oils of sardines from the Sea of Marmara were extracted, analysed and stored at +4 degrees C for 4 and 8 days, and thereafter at -30 degrees C for 24 months. Fatty acid composition analyses were perfor...
Capillary supercritical fluid chromatography (cSFC)-Fourier transform infrared spectroscopy (FT-IR)-flame ionization detection (FID) has been used to examine the separation of a synthetic mixture of saturated triglycerides. A careful study of the on-line FT-IR spectra of the separated components revealed that relative absorption intensifies of the...
The quantitative effects on chromatographic resolution of FTIR flow-cells for detection in capillary SFC have been determined. A suitably designed cell with a volume of 500 nl was shown to cause only modest broadening of chromatographic peaks obtained from the surfactant mixture Triton X-100, showing that subsequent detection methods can therefore...
We have shown that a flow cell Fourier transform (FT) IR detector for capillary supercritical fluid chromatography (cSFC) can give minimum detection limits which are much lower than any previously reported for on-line cSFC—FT-IR. The system was tested using a range of analytes. The following reproducible values were obtained, using supercritical CO...
The unique properties of supercritical fluids have been successfully exploited in the development of novel hyphenated analytical techniques. Supercritical fluid extraction (SFE) followed by gas chromatography–mass spectrometry was used to characterize an intractable deposit from an internal combustion engine valve. Supercritical fluid chromatograph...
