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Öğe Antioxidative effects of alkyl esters of sinapic acid on flaxseed oil and its fatty acid methyl esters(Wiley, 2024) Arslan, Derya; Polak, Tomaz; Ulrih, Natasa PoklarAlkyl esters of sinapic acid were enzymatically synthesized by using hexanol CH3(CH2)5OH and palmitoyl chloride CH3(CH2)14COCl as acyl donors. The lipid oxidation retarding activities of these conjugates were determined using different methods in two lipid media; bulk flaxseed oil and its fatty acid methyl esters (FAME). Palmitoyl sinapate more efficiently slowed down the formation of primary and secondary oxidation products in both lipid media. In terms of DPPH radical scavenging activity, beta-carotene bleaching and TEAC assays, it provided higher activity compared to hexyl ester in FAME. Hexyl ester was more active in bulk oil in terms of antioxidant activity analyses. The alkyl side chain length of these molecules had an impact on their antioxidative activity and this effect differed according to the environment in which they were used. The conjugates remained more stable on storage compared to the phenolic compounds originally found in the oil samples. imageÖğe Associations between Emotional Eating and Metabolic Risk Factors at Adolescents with Obesity(Lifescience Global, 2020) Sayin, Fatma Kubra; Buyukinan, Muammer; Deniz, Cigdem Damla; Arslan, DeryaPurpose: This study aimed to determine whether emotional eating (EE) and uncontrolled eating (UCE) scores affect the metabolic risk factors in obese adolescents. Methods: A sample of 100 adolescents have BMI-SDS between 1.41 and 2.83 (aged 12-17 years) was selected. EE and UCE scores were estimated using the TFEQ21. The association of EE and UCE with anthropometric data, lipid profile, glucose profile, liver enzymes, and inflammation factors was assessed in boys and girls. Results: Using Spearman rank correlation, EE scores significantly correlated with uric acid (r = 0.393 and P = 0.001), CRP (r = 0.273 and P = 0.017), TG (r = 0.317 and P = 0.001), TC (r = 0.258 and P = 0.019) and VAI (r = 0.276 and P = 0.034). Also UCE scores were showed positive correlation with CRP (r = 0.257 and P = 0.024). Conclusion: In conclusion, interrelationships tend to exist between EE and triglyceride, uric acid, visceral adiposity index, and CRP levels among obese adolescents.Öğe Characterization of Turkish Olive Oils in Details(Taylor & Francis Inc, 2020) Arslan, Derya; Ok, SalimOlive oil is an important part of the human diet worldwide. Its production has increased every year. Adulteration detection and labeling olive oils with a declaration of geographical origin now is a new challenge for scientists. First, in this report, we summarize the contributions on quantitative analysis of fatty acids in Turkish olive oils. Then, we describe the reports of the minor constituents including phenols and aromatics of these olive oils, followed by less studied properties such as inorganic metal contents, bioactivity, and adulteration detection. While analyzing both the major and minor components of Turkish olive oils, we show also a comparison of their contents with other olive oils from Spain, Italy, Greece, and Tunisia. We conclude with lessons learned and aspects of scientific future work need to be done for the protection of the authenticity of olive oils.Öğe Combined use of some natural antioxidants in sunflower oil(Innovhub Ssi-Area Ssog, 2022) Bozyokus, Betul; Arslan, DeryaCombined use of antioxidants is highly effective in preventing oxidation. In this study, combined effects of ethanolic extracts of turmeric (T) and potato peel (PP), a- tocopherol (a), ss- carotene (ss), ascorbyl palmitate (AP), citric acid (C) and lecithin (L) were evaluated in sunflower oil. The antioxidant activities of these substances were evaluated individually and with binary and ternary combinations with different concentrations. The combined effect of AP (1000 ppm) and T (5000 ppm) was strong when all oxidative evaluation analysis were considered: lowering peroxide value by 3.5-fold, almost doubling the induction time and having the highest protection factor percentage (94.95%). AP in blends was found efficient in terms of protecting sunflower oil against oxidation and was not present in non-efficient mixtures. L followed it regarding efficiency. In the mixtures consisted of AP-,L-PP (83.7% protection factor (PF)) and AP-L-T (19.6% PF), namely in the presence of identical concentrations of PP and T, superior PF for the mixture containing PP was determined, which was thought to be based on the higher hydrophilicity of PP. C and a in mixtures were not effective enough to retard the oxidation. Combinations of PP-L-ss (-23.8%) and T-L-a (-19.5%) showed negative relationships. The results also demonstrated concentration-dependency of the antioxidants in terms of antioxidant efficiency. Our findings about the efficient interactions between different natural compounds could provide information to develop natural plant-based antioxidant mixtures with greater effectiveness than their single use in retarding oil oxidation.Öğe The Comparison of the Chemical Composition, Sensory, Phenolic and Antioxidant Properties of Juices from Different Wheatgrass and Turfgrass Species(Univ Agr Sci & Veterinary Med Cluj-Napoca, 2016) Ozkose, Abdullah; Arslan, Derya; Acar, AysenurWheatgrass juice is mainly derived from the common wheat Triticum aestivum L. The present study focused on the analysis of the potential of different perennial turfgrass species in grass juice production by determining certain compositional characteristics. The effects of fertilisers on the plants and the cutting time on some chemical constituents and antioxidant potential of grass juices were addressed. The juices from the different species of grasses, such as T. durum, T. aestivum, Lolium perenne L., Festuca arundinacea Schreb. were obtained by pressing. DPPH (1, 1dipheny1-2-picrylhydrazyl) radical scavenging activity, elemental composition, total chlorophylls, total carotenes, tocopherols, vitamin C, total phenols, viscosity and the colour profiles of the grass juice samples were analysed. Water-soluble dry matter, protein, total phenols, flavonoids and vitamin E (especially Durum cultivar) content were found to be higher in the juices of Triticum species as compared to the other grasses. Turfgrass species demonstrated higher concentrations of oil (in grass), vitamin C (unfertilised samples), chlorophyll (except L. perenne local) and major elements. The pressing of turfgrass was an easy process. Such perennial grass varieties have advantages over the Triticum species in terms of having higher concentrations of vitamin C (unfertilised samples) and major elements. The results of sensory analysis suggested that L. perenne (cultivar) is the most promising cultivar in terms of obtaining pressed grass juice.Öğe The Comparison of the Chemical Composition, Sensory, Phenolic and Antioxidant Properties of Juices from Different Wheatgrass and Turfgrass Species(Univ Agr Sci & Veterinary Med Cluj-Napoca, 2016) Ozkose, Abdullah; Arslan, Derya; Acar, AysenurWheatgrass juice is mainly derived from the common wheat Triticum aestivum L. The present study focused on the analysis of the potential of different perennial turfgrass species in grass juice production by determining certain compositional characteristics. The effects of fertilisers on the plants and the cutting time on some chemical constituents and antioxidant potential of grass juices were addressed. The juices from the different species of grasses, such as T. durum, T. aestivum, Lolium perenne L., Festuca arundinacea Schreb. were obtained by pressing. DPPH (1, 1dipheny1-2-picrylhydrazyl) radical scavenging activity, elemental composition, total chlorophylls, total carotenes, tocopherols, vitamin C, total phenols, viscosity and the colour profiles of the grass juice samples were analysed. Water-soluble dry matter, protein, total phenols, flavonoids and vitamin E (especially Durum cultivar) content were found to be higher in the juices of Triticum species as compared to the other grasses. Turfgrass species demonstrated higher concentrations of oil (in grass), vitamin C (unfertilised samples), chlorophyll (except L. perenne local) and major elements. The pressing of turfgrass was an easy process. Such perennial grass varieties have advantages over the Triticum species in terms of having higher concentrations of vitamin C (unfertilised samples) and major elements. The results of sensory analysis suggested that L. perenne (cultivar) is the most promising cultivar in terms of obtaining pressed grass juice.Öğe Development of infusion tea formulations with food wastes: Evaluation of temperature and time effects on quality parameters(Elsevier, 2022) Acar, Aysenur; Aydin, Merve; Arslan, DeryaThe study aimed to investigate the suitability of some food wastes for use in the production of herbal tea and to reveal their properties in terms of bioactive component content, some physical properties and sensory quality. Three new blends consisting of banana, pomegranate, mandarin, eggplant and red onion peels, walnut shell, cherry stalk and corn tassel were infused at different temperatures (70 and 100 degrees C) and time (3, 4 and 5 min). Corn tassel tea, which has a high phenolic component content (677.7 mg GAE/L), received less sensory acceptance due to its bitter aftertaste. Therefore, walnut shell tea containing moderate phenolic content was the most preferred tea blend. Significant effects of different infusion temperatures and times on the color indices of teas were also demonstrated. The sensory properties of samples infused for 3 min were more acceptable. The highest correlation coefficients were calculated between total phenolic compounds and subjective odor parameters. Utilization of mandarin, pomegranate, banana, eggplant and red onion peels, walnut shell, corn tassel and cherry stalk in formulating a functional and an alternative food product can be attractive to consumers and industrial producers due to their affordability and high bioactivity.Öğe Inoculation of arbuscular mycorrhizal fungi and application of micronized calcite to olive plant: Effects on some biochemical constituents of olive fruit and oil(Elsevier, 2015) Kara, Zeki; Arslan, Derya; Guler, Mehmet; Guler, SebnemSome physico-chemical properties of olive fruits (Olea europaea L., variety 'Sariulak') and their corresponding oils during 2007-2013 crop seasons were investigated following inoculation with arbuscular mycorrhizal fungi (AMF, Rhizophagus intraradices) and application of micronized calcite (MC) [as plant growth stimulating product] with special emphasis on individual phenolic compounds. Olive fruits showed greater accumulation of hydroxytyrosol and p-hydroxybenzoic acid in plants on which AM was inoculated when compared to the values of uninoculated plants. AMF inoculation resulted in a reduction in vanillin, dimethyloleuropein and luteolin content of olive fruits. Secoiridoid aglycones in the olive oils from treated trees generally tend to decrease. There were differences in the levels of phenolics in fruits and their corresponding oils, such as the amount of hydroxytyrosol rose in AMF+ MC applied fruits, nevertheless the amount of verbascoside, a secoiridoid conjugate of hydroxytyrosol, declined in the oil of AMF+ MC treated plants. After the application of AMF + MC, the oils did not show a significant change in the total phenolics content contrarily to olive fruits. These results highlight that phenolic compounds having hydrophilic structure were influenced by AMF+ MC application more than those of lipophilic structure. (C) 2015 Elsevier B.V. All rights reserved.Öğe Normal M mode values in healthy Turkish children(2014) Oran, Bülent; Bodur, Abdurrahman Said; Arslan, Derya; Çimen, Derya; Güvenç, OsmanAim: Evaluation of cardiac structures requires a large study group for accurate data on normal values. The aim of the study was to obtain normal M mode echocardiographic values in a substantial sample of healthy term neonates and children to develop centile charts. Materials and methods: Data were obtained over 2 years from a single center in Turkey, from 1200 healthy infants and children aged 1 day to 17 years. Using echocardiographic investigation, measurements were obtained of the following: left ventricular dimension at end diastole and end systole; thickness of interventricular septum and posterior wall of the left ventricle; aortic and pulmonary root diameter; and left atrial dimension. The influence of systematic errors as statistical noise in this large sample was decreased using thirddegree polynomial curves. Results: Measurements are presented graphically as curved lines of centiles with respect to body weight for healthy term neonates and children. The values showed a good correlation with body weight and allowed the construction of percentile curves (5%, 25%, 50%, 75%, and 95%). Higher values were observed in boys during adolescence. Conclusion: The presented charts and tables make it possible to judge the echocardiographic measurements of a particular patient as normal or abnormal.Öğe Phenolic profile and in vitro antioxidant power of different milk thistle [Silybum marianum (L.) Gaertn.] cultivars(Elsevier, 2016) Lucini, Luigi; Kane, David; Pellizzoni, Marco; Ferrari, Annarita; Trevisi, Erminio; Ruzickova, Gabriela; Arslan, DeryaMilk thistle (Silybum marianum (L.) Gaertn.) is a rich source of phytochemical compounds exhibiting functional roles in plant metabolism and nutraceutical effects on human health. The aim of the present work was to characterize the phytochemical and antioxidant profiles of the achenes from fifteen different genotypes of milk thistle, by measuring the total phenolics, flavonoids and flavonols content as well as antioxidant capacity. In addition, selected individual phenolic compounds were determined by liquid chromatography tandem mass spectrometry. The majority of polyphenols in milk thistle were composed of chlorogenic acid and the flavonolignan silybin. Significant differences were identified between cultivars for total antioxidant capacity and for all tested classes of compounds. Genotypes 1 and 2 had the highest total phenolics and flavonoids content, as well as the strongest antioxidant activity. Genotype 8 contained high levels of caffeic acid, 10-15 times greater than values obtained for the other genotypes. Antioxidant capacity was mainly correlated to total phenolics and flavonoids, rather than to single compounds. The study pointed out the important role of milk thistle genetic background on the actual chemical and antioxidant profiles of milk thistle achenes. (c) 2015 Elsevier B.V. All rights reserved.Öğe Single and combined use of isomalt, polydextrose, and inulin as sugar substitutes in production of pectin jelly(Wiley-Hindawi, 2022) Unal, Meltem H.; Arslan, DeryaIn this study, 60% of the total sugar (sucrose and corn syrup) in pectin jellies was substituted by using single or various combinations of the bulking agents: isomalt, polydextrose, and inulin. Substitution with isomalt resulted in lower hardness and flexibility and lower moisture content; it ended up with an opaque and rough appearance on the outer surface, thus causing lower sensory acceptability and shorter storage stability than conventional product. Substitution of sugars with inulin was found to be successful in terms of lowering water activity, improving sensory characteristics, and supporting the prebiotic activity (B. clausii). Polydextrose was also successful, while bringing with the handicap of a softness perception in the jelly due to high hygroscopicity. Besides, it was the most effective bulking agent for growth of both the beneficial probiotic bacteria tested (Lactobacillus acidophilus and Bacillus clausii). The highest colony counts of L. acidophilus was found in Inulin+Polydextrose jelly (220 x 10(4) CFU/g); however, this synergistic effect of inulin and polydextrose was not observed for B. clausii. Substitution of sugars with only inulin gave the best results for taste, at the same time scored high for color and appearance. In relation to this, 90% of panelists preferred the inulin jelly as I would definitely buy. The lowest energy values were achieved in jellies developed by the addition of polydextrose, inulin+polydextrose, and isomalt+polydextrose with 43.1% 39.9%, and 38.8% reductions in calorie, respectively, compared with the conventional product. The results demonstrated many aspects of the successful use of polydextrose and inulin alone or in combination as sugar substitutes in the production of pectin jelly. Practical applications The awareness for the consumption of functional foods, which contain ingredients that provide additional health benefits beyond the basic nutritional requirements, is in increasing demand. In order to meet this demand of consumers, nutritious, functional, and alternative foods have started to take their place in the market. Confectionery products have an important place among these food groups. As a market that has consumers from all age groups apart from basic nutritional needs, the confectionery sector has a diverse product group and large consumer base in the world. Prebiotics are included in confectionery products in order to give mouthfeel, texture, functional attributes, and some act as bulking agent. We investigated the combined use of prebiotics such as polydextrose, inulin, and isomalt as bulking agents in soft pectin jellies, and significant improvement was achieved in terms of low-energy product development. The low-energy soft-type pectin jellies were characterized, and the samples using prebiotics showed various advantages in terms of physical properties.Öğe Ultrasound Technology Parameters: Effects on Phenolics in Olive Paste and Oil in Relation to Enzymatic Activity(Wiley, 2019) Yahyaoui, Amira; Rigane, Ghayth; Mnif, Sami; Ben Salem, Ridha; Acar, Aysenur; Arslan, DeryaIn this paper, the occurrence of secoiridoid aglycones via degradation of phenolic glucosides which have strong effects on commercial, nutritional, and sensory properties of olive oil is studied. The experiment consists in the sonication treatment of Chemlali and Memecik cvs. olive paste three times for 4, 8, and 10min. This kind of approach has never been used in determining the partition and degradation of phenolics during extraction. Concerning phenolic content present in Chemlali olive oil extracted from whole olives, no significant differences are found after 10min of treatment using ultrasound apparatus, whereas a rise of more than 60% is detected if olive paste without stones is used. On the other hand, the total phenolic content of Memecik cv. increases positively with the increasing time of treatment. Throughout this report, it is noted that enzymatic activities are affected by ultrasound treatment.Practical Applications: The results of this study will be useful in modification of present processes or development of new processes with the aim of protecting and improving the phenolic composition of olive oil. To the best of the authors' knowledge, this kind of systematic approach has never been used in determining the partition and degradation of phenolics during extraction. It is believed that describing the effects of high-power ultrasound applications on olive paste before malaxation will exhibit possible benefits for the future of olive processing technology. The optimization of olive oil extraction parameters with proper adjustments in such a way that the quality of the product is highly increased is an important issue. The effect of ultrasound technology parameters is investigated from the point of phenolic compounds by searching their relation to enzymes in Chemlali and Memecik cvs. olive paste. In addition, the effects of stone removal during extraction are also studied in terms of enzymes in Chemlali and Memecik cvs. olive paste and phenols in olive oil.Öğe The Value of Neutrophil:Lymphocyte Ratio and Platelet:Lymphocyte Ratio in Predicting Clinical Severity in Children with Carbon Monoxide Poisoning(Springer India, 2021) Bagci, Zafer; Arslan, Abdullah; Arslan, DeryaObjective To compare the values of neutrophil:lymphocyte ratio (NLR), platelet:lymphocyte ratio (PLR), and mean platelet volume (MPV) with carboxyhemoglobin (COHb) and lactate levels in children with acute CO intoxication. Methods In this retrospective study, the patients were divided into two groups: mild-to-moderate carbon monoxide poisoning (COP) (COHb 10%-20%) and severe COP (COHb > 20%) according to the COHb levels in the application. All patients were compared in terms of NLR, PLR, and MPV parameters according to the severity of poisoning and the high lactate levels (>= 2.2 mmol/L). Results A total of 261 children with COP were included in the study. The number of patients with mild-to-moderate COP was 183 (70.1%), and the number of patients with severe COP was 78 (29.9%). NLR [2.57 (3.27), 1.65 (1.93), (p = 0.001)] and PLR [123.0 (88.24), 92.8 (54.1), (p = 0.001)] values of mild-to-moderate COP were statistically significantly lower than the severe COP group. In the group with high lactate level, PLR values were significantly lower [120.1 (71.9), 100.2 (85.4), (p = 0.017)]. NLR and PLR values were found to be predictive of severe COP. Conclusion NLR and PLR can be used for detection of clinical severity in patients with COP. PLR can be used in conjunction with lactate levels to detect tissue-level exposure in patients with COP.Öğe Variations of phenolic compounds, fatty acids and some qualitative characteristics of Sariulak olive oil as induced by growing area(Elsevier Science Bv, 2013) Arslan, Derya; Karabekir, Yesim; Schreiner, MatthiasThe extra virgin olive oils of Sariulak olive variety were produced from olives cultivated in three different locations (Antalya, Karaman, Mersin) in the south region of Turkey and were analyzed to select varieties and conditions that produce oil with favorable quality regarding oxidative stability, taste and nutritional properties. Peroxide value, free acidity, chlorophyll and carotene content, color values, and fatty add compositions were measured and the contents of secoiridoid aglycones and lignans were determined with a qualitative and quantitative analysis performed by GC-MS to characterize the different subclasses. In particular the following sub-classes of phenols were identified and calibrated: simple phenols such as tyrosol and hydroxytyrosol (3,4-DHPEA and p-HPEA), their respective acetates (3,4-DHPEA-AC and p-HPEA-AC), secoiridoid derivatives such as the dialdehydic form of elenolic acid linked to 3,4-DHPEA or p-HPEA (3,4-DHPEA-EDA, p-HPEA-EDA, where EDA is elenolic add dialdehyde) and isomers of oleuropein and ligstroside aglycones (3,4-DHPEA-EA and p-HPEA-EA, where EA is elenolic acid aldehyde), lignans such as (+)-1-acetoxypinoresinol, and (+)-1-pinoresinol and hydroxy-pinoresinol. Significant differences were observed in most of the parameters between the olive oils produced from different locations. (C) 2013 Elsevier Ltd. All rights reserved.
