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Öğe Antifungal activities of different essential oils against anise seeds mycopopulations(M H SCHAPER GMBH CO KG, 2016) Starovic, Mira; Ristic, Danijela; Pavlovic, Snezana; Ristic, Mihailo; Stevanovic, Milos; Al Juhaimi, Fahad Y.; Svetlana, NaydunThe aim of this study was to investigate the possibility of biological control of fungal species isolated from anise seeds using essential oils from medicinal plants: mint (Mentha spicata L.), sage (Salvia fruticosa L.), rosemary (Rosmarinus officinalis L.), anise (Pimpinella anisum L.), bitter fennel (Foeniculum vulgare spp. piperituum L.) and myrtle (Myrtus communis L.). Ten fungal species isolated from anise seeds: Bipolaris/Drechslera sorociniana, Fusarium subglutinans, F. vertricilioides, F. oxysporum, F. tricinctum, F sporotrichioides, F. equiseti, F. incarnatum, F proliferatum and Macrophomina phaseolina, were used in this experiment The minimum inhibitory concentrations (MIC) were determined by micro-dilution method using selected essential oils (EOs). A qualitative and quantitative chemical analyses of EOs were carried out. All EOs exhibited a significant antifungal activity against all tested fungal isolates. The myrtle EO proved to be the most potent one (MIC 0.0003-3.25 mg/mL, then mint 0.0003-7.75 mg/mL and sage 0.0003-10 mg/mL). All tested fungi were observed to have a susceptibility to all selected essential oils. These results suggest the possibility for application of the EOs in biological control of anise production.Öğe Antioxidant and antifungal activity of some aromatic plant extracts(ACADEMIC JOURNALS, 2011) Özcan, Mehmet Musa; Al Juhaimi, Fahad Y.In this study, the antioxidant and antifungal activities of extracts of sage, rosemary, basil, laurel, pickling herb and summer savory were established. Total yields, radical scavenging activity and the antioxidant capacities of the extracts were determined. The free radical scavenging activities of extract was established as 42.3 +/- 3.1 to 78.9 +/- 7.1%, respectively. The antioxidant capacities of extracts were found between 167.4 +/- 12.3 to 358.7 +/- 21.3 mg/g extract. This extract was investigated for antifungal activity by using paper disc method against five fungi (Aspergillus niger, Alternaria alternate and Aspergillus parasiticus NRRL 2999). The 0.5% level of summer savory extract showed 100% inhibition till the 7th day of incubation. Statistical differences within fungi were important at p<0.05. The extract was partly effective against all the fungi used in experiment.Öğe Antioxidant effect of mint, laurel and myrtle leaves essential oils on pomegranate kernel, poppy, grape and linseed oils(ELSEVIER SCI LTD, 2012) İnan, Özlem; Özcan, Mehmet Musa; Al Juhaimi, Fahad Y.Antioxidant effects of mint (Mentha spicata L), laurel (Laurus nobilis L) and myrtle leaf (Myrtus communis L) essential oils on pomegranate kernel, poppy, grape and linseed oils were determined. Essential oils at the level of 0.01% and 0.05% were added into the oils and stored in a drying oven (60 degrees C) for 6 weeks and analyzed for peroxide value, free acidity and viscosity biweekly. Both of concentrations of the essential oils were found to be preventing the increase of viscosity of the oils in comparison to the control samples. On the other hand, an important increase was observed in both the peroxide and acidity values during the experiment period. The levels of 0.05% of essential oils were found to save the values lower than levels of 0.01% and control samples. In conclusion, use of essential oils improved the oxidative stability and fastened the viscosity values of the edible oils. (C) 2012 Elsevier Ltd. All rights reserved.Öğe Antioxidant Properties and Total Phenolic Content of Two Solvent Extraction Extracts of Some Plants Belong to Labiatae Family(ASIAN JOURNAL OF CHEMISTRY, 2013) Al Juhaimi, Fahad Y.; Sağlam, Coşkun; Özcan, Mehmet MusaIn vitro radical scavenging activity and the total phenolic content (Folin-Ciocalteu method) of two solvents (methanolic and ethyl acetate) extracts of some plants grown in Turkey were studied by using 1,1-diphenyl-2-picrylhydrazyl (DPPH) scavenging assay. Although the total phenolic content of the ethyl acetate extract of R. officinalis (41.8 mg GAE/g dry weight) is higher than that of L. angustifolia (12.7 mg GAE/g dry weight), the corresponding radical scavenging activity of R. officinalis (19.3%) is higher than those of other plants. The total phenolic content of the methanolic extract of R. officinalis (34.8 mg GAE/g dry weight) is higher than those of other plant species. At the same time, its corresponding antioxidant activity is higher (21.8%). It was established that there was positive linear correlation between radical scavenging activity and total phenolic contents.Öğe Antioxidant properties, total phenolic content of two solvent extraction extracts of some plants belong to labiatae family(2013) Al Juhaimi, Fahad Y.; Sağlam, Coşkun; Özcan, Mehmet MusaIn vitro radical scavenging activity and the total phenolic content (Folin-Ciocalteu method) of two solvents (methanolic and ethyl acetate) extracts of some plants grown in Turkey were studied by using 1,1-diphenyl-2- picrylhydrazyl (DPPH) scavenging assay. Although the total phenolic content of the ethyl acetate extract of R. officinalis (41.8 mg GAE/g dry weight) is higher than that of L. angustifolia 12.7 mg GAE/g dry weight), the corresponding radical scavenging activity of R. officinalis (19.3 %) is higher than those of other plants. The total phenolic content of the methanolic extract of R. officinalis (34.8 mg GAE/g dry weight) is higher than those of other plant species. At the same time, its corresponding antioxidant activity is higher (21.8 %). It was established that there was positive linear correlation between radical scavenging activity and total phenolic contents.Öğe Bioactive properties and phenolic compounds in bud, sprout, and fruit of Capparis spp. plants(Blackwell Publishing Ltd, 2020) Ghafoor K.; Al Juhaimi, Fahad Y.; Özcan, Mehmet Musa; Uslu, Nurhan; Babiker, Elfadil E.; Mohamed Ahmed I.A.In this study, changes in bioactive properties and phenolic compounds of different caper parts were reported. Total phenolic contents of C. ovata and C. spinosa plants varied between 175.35 mgGAE/100 g (fruit) and 518.4 mgGAE/100 g (small bud) to 143.58 mgGAE/100 g (fruit and 597.57 mgGAE/100 g (small bud), respectively. While total flavonoid contents of C. ovata parts vary between 9.12 mg/g (fruit) and 37.22 mg/g (small bud), total flavonoid contents of C. spinosa parts changed between 7.43 mg/g (fruit) and 62.39 mg/g (small bud). Antioxidant activity values of C. ovata and C. spinosa parts varied between 53.43% (sprout) and 76.40% (medium bud) to 50.51% (fruit) and 76.65% (medium bud), respectively. While (+) catechin contents of C. ovata parts change between 22.16 mg/100 g (fruit) and 149.13 mg/100 g (small bud), (+)-catechin contents of C. spinosa parts varied between 65.50 mg/100 g (fruit) and 99.29 mg/100 (small bud). 1,2-Dihydroxybenzene contents of C. ovata ranged from 33.4 mg/100 g (fruit) to 142.41 mg/100 g (small bud) while 1,2-dihydroxybenzene contents of C. spinosa parts are found between 75.17 mg/100 g (fruit) and 127.32 mg/100 g (medium bud). Practical applications: Caper plant grows at the most countries of Africa, Asia, and South European. Capers have very important roles for beneficial natural components in the food industry. Caper buds and fruits are used for human nutrition. It is utilized to prepare salada as a culinary herb. Caper has pungent and bitter flavor, and are used as an appetizer with olives, cheese, and nuts. There are a significant increase in the interest of bioactive compounds from plant products. Curative and medicinal properties of capers are linked to the presence of bioactive compounds. © 2020 Wiley Periodicals, Inc.Öğe Bioactive Properties, Fatty Acid Composition and Mineral Contents of Grape Seed and Oils(SOUTH AFRICAN SOC ENOLOGY & VITICULTURE-SASEV, 2017) Al Juhaimi, Fahad Y.; Geçgel, U.; Gülcü, Mehmet; Hamurcu, Mehmet; Özcan, Mehmet MusaThe oil content of grape seed samples changed between 4.53% (Adakarasi) and 11.13% (Sauvignon blanc). While the linoleic acid contents of grape seed oils ranged from 47.34% (Sangiovese) to 72.91% (Cinsaut), the oleic acid contents varied between 13.35% (Cabernet Sauvignon) and 26.30% (Sangiovese) (p < 0.05). Also, the palmitic acid and stearic acid contents of grape seed oils ranged from 7.15% (Cinsaut) to 16.06% (Sangiovese) and from 2.43% (Narince) to 6.55% (Sangiovese) respectively (p < 0.05). The flavonoid contents of the seeds changed between 263.53 (mg CE/g) and 1 706.00 (mg CE/g) (Cabernet Sauvignon). Total phenols were found to be between 6 711:.14 (mg GA/g extract) (Sangiovese) and 8 818.69 (mg GA/g extract) (Narince). The linoleic contents of oils changed from between 47.34% (Sangiovese) and 72.91% (Cinsaut). The K contents of the grape seed samples changed between 4 347.80 mg/kg (Cabernet Sauvignon) and 9 492.60 mg/kg (Gamay) (p < 0.05). The Fe contents of seeds were found to be between 29.96 mg/kg (Narince) and 73.82 mg/kg (Sangiovese). As a result, the current study shows that grape seeds are useful for human nutrition due to their components.Öğe Biochemical properties of some Salvia L. species(SPRINGER, 2013) Er, Melek; Tugay, Osman; Özcan, Mehmet Musa; Ulukuş, Deniz; Al Juhaimi, Fahad Y.Antioxidant capacity, total phenol and mineral contents of aerial parts of sage belonging to some Salvia species were established. The lowest and highest antioxidant values of Salvia dichroantha Stapf and Salvia heldreichiana Boiss. ex Benth. extracts were found as 73.855 and 80.207 mg GAE/g, respectively. While the highest total phenol was established in Salvia tomentosa Mil. (13.316 mg GAE/100 ml), the lowest level was found in Salvia halophila Hedge (6.168 mg GAE/100 ml). While K contents of plants changed between 14,518 and 24,171 mg/kg, Ca contents ranged between 12,402 and 18,553 mg/kg. P and Mg contents were found low compared with K and P values of plants. Mg content was changed between 2,118 and 2,914 mg/kg; the mean was calculated as 2,496 mg/kg. P contents of plants were determined between 1,385 to 1,910 mg/kg. As a microelement, Fe was found at the highest level. Fe contents of plants were found between 179 and 782 mg/kg.Öğe Chemical Composition of the Essential Oil of Pimpinella isaurica Matthews subsp. isaurica(TAYLOR & FRANCIS LTD, 2015) Figueredo, Guilles; Chalchat, Jean Claude; Doğu, Süleyman; Chalard, Pierre; Özcan, Mehmet Musa; Bağcı, Yavuz; Al Juhaimi, Fahad Y.The essential oil of aerial parts of P. isaurica wild growing in South Anatolia was extracted by using a Clevenger type apparatus, and analysed by GC and GC-MS. The percentage yield of the essential oil from of aerial parts of Pimpinella was 0.2 %. The oil was colourless to pale-yellow in colour. Fifty-three compounds representing 98.0 % of the P. isaurica oil were identified. The major constituents in the oil from the aerial parts of P. isaurica were: sabinene (12.79 %), myrcene (4.43 %), geijerene (24.30 %), terpinene-4-ol (4.71 %), dictamnol (5.82 %), caryophyllene oxide (3.84 %). Caryophyllene oxide was common to all samples. Other compounds were found in the oils but with some quantitative variation. Fifty-three compounds were identified in the aerial parts oil.Öğe Chemical constituents in essential oils of Salvia officinalis L. and Salvia fruticosa Mill.(AGRIMEDIA GMBH, 2015) Özcan, Mehmet Musa; Figueredo, Gullies; Chalchat, Jean Claude; Chalard, Pierre; Al Juhaimi, Fahad Y.; Ghafoor, Kashif; El Babiker, El FadilEssential oils from dried aerial parts of Salvia officinalis L. and Salvia fryticosa Mill. Provided from Bosnia-Herzogoviena (Sarajova) and Turkey (Mugla) were analysed using gas chromatography-mass spectrometry (GC-MS). The air dried plant materials were subjected to hydrodisfiliation for 4 h using a Clevenger type apparatus to give yellow oils in 1.76% (S. officinalis) and 1.39% (S. fruticosa), respectively. Thirty-one and fourty constituents were identified in the oils of both plants, representing 96.33 and 98.23% of the total oil. While alpha-pinene (9.65%), camphene (9.46%), eucalyptol (9.18%), thujone-cis (24.59%) and camphre (23.06%) were established as major constituents of S. officinalis L., alpha-pinene (3.62%), camphene (5.26%), camphre (26.76%), borneol (8.91%) and eucalyptol (40.11%) were found as major constituents of S. fruticosaÖğe Comparison of Chemical Constituents of Essential Oils of Black Cumin (Nigella sativa L.)(ASIAN JOURNAL OF CHEMISTRY, 2013) Al Juhaimi, Fahad Y.; Figueredo, Gilles; Özcan, Mehmet Musa; Chalard, PierreEssential oils from dried aerial parts of Nigella sativa were analyzed using gas chromatography-mass spectrometry (GC-MS). The air dried plant materials were subjected to hydrodistillation for 4 h using a Clevenger type apparatus to give yellow oils. The major compounds in the essential oil of Turkey sample were alpha-thujene (15.78 %), p-cymene (48.25 %), trans-4-methoxythujane (6.56 %), beta-pinene (4.60 %), alpha-pinene (3.52 %) and limonene (2.88 %) while p-cymene (51.42 %), alpha-thujene (16.36 %), trans-4-methoxythujene (6.11 %), beta-pinene (3.98 %), alpha-pinene (3.60 %) and limonene (2.84 %) were major components of Syria essential oil. The main compound of Ethiopia essential oil was p-cymene (55.03 %) followed by alpha-thujene (18.19 %), trans-4-methoxythujene (6.33 %), beta-pinene (4.50 %), alpha-pinene (3.96 %) and limonene (2.85. %).Öğe Comparison of chemical properties of taro (Colocasia esculenta L.) and tigernut (Cyperus esculentus) tuber and oils(WILEY, 2018) Al Juhaimi, Fahad Y.; Şimşek, Şenay; Özcan, Mehmet MusaMoisture, crude protein, and crude oil contents of taro and tigernut tubers were found to be 7.3% and 5.9%, 12.31 and 4.53%, and trace and 22.07%, respectively (p<.05). Total amino acid contents of taro and chufa tubers were 10.00 and 3.60%, respectively. While amino acid contents of taro ranges from 0.01% (hydroxyproline) to 1.54% (aspartic acid), amino acid contents of chufa tuber ranges from 0.01% (hydroxyproline) to 0.58% (glutamic acid) (p<.05). Linoleic, palmitic, and oleic acids were found as major fatty acids of both samples. While linoleic, palmitic, and oleic contents of taro are determined as 46.50%, 24.36%, and 10.00%, the same acids in chufa oil were 10.69%, 12.94%, and 69.51%, respectively. Generally, fructose, glucose, sucrose, and maltose were established in both samples. Sucrose contents of taro and chufa ranged between 1.34 and 17.78%, respectively (p<.05) As a result, taro tubers contained higher aspartic (1.54%) and glutamic acid (1.50%) compared to tigernut tuber results. Practical applicationsTaro corms contain considerable amount of starch. Taro is a good source of amino acid and minerals. Chufa is commonly known as earth almond contains high quality oil, and its amount is about 25.5%. The chufa nut was found to be rich in oleic and linoleic acids. Both taro and tigernut tubers can be used as edible tubers in kitchen. Results will inform on the nutritional value of the nuts and will also be useful in evaluating the nut oils for oleochemical uses.Öğe Constituents of the Essential oil of Origanum vulgare subsp hirtum Growing Wild in Turkey(TAYLOR & FRANCIS LTD, 2012) Özcan, Mehmet Musa; Pedro, Luis Gaspar; Al Juhaimi, Fahad Y.; Endeş, Züleyha; Erol, Ahmet Sami; Duman, Erman; Er, FatihThe essential oil obtained from leaves of Origanum vulgare subsp. hirtum was analysed by GC-MS. Twenty-eight components were identified accounting for 99.4 % and 99.5 %, the oils of two region (Buyukcccli and Dclikkaya), respectively. The major components were carvacrol (51.4 % and 63.3 %), linalool (28.3 % and 2.3 %),gamma- terpinene (6.0 % and 9.9 %) and p-cymene (4.8 % and 8.7 %). The oils contained mainly oxygenated monoterpenoids and monoterpenoid hydrocarbons.Öğe Determination of antioxidant activity, phenolic compound, mineral contents and fatty acid compositions of bee pollen grains collected from different locations(RESEARCH INST POMOLOGY FLORICULTURE, DIV APICULTURE, 2019) Özcan, Mehmet Musa; Al Juhaimi, Fahad Y.; Babiker, Elfadil E.; Uslu, Nurhan; Ceylan, Durmuş Ali; Ghafoor, Kashif; Özcan, Mustafa Mete; Dursun, Nesim; Ahmed, Isam A. Mohamed; Jamiu, Fadimu Gbemisola; Alsawmahi, Omer N.The objective of the present work was to investigate the influence of locations on bioactive propertiest, phenolic compounds and mineral contents of bee pollens. The oil content of pollen grains changed between 3.50% (Alanya) and 6.85% (Russia-Perm Region). The highest total phenolic content (720 mg/100g) and antioxidant activity values (81.4%) were observed in pollens obtained from the Russia-Perm Region and Alanya districts, respectively. Additionally, the highest carotenoid was found in a pollen sample collected from Karaman (Sanveliler) (98.6 mg/g). The major phenolic compounds were (+)-catechin (66.75-337.39 mg/100g) and quercetin (61.2-1221.7 mg/100g) in all pollen samples. The pollen samples were observed to be a significant source of potassium (3846-6287 mg/kg), phosphorus (2947-5010 mg/kg), calcium (1022-2424 mg/kg) and sulfur (1744-2397 mg/kg). All of the analysis results were significantly affected by supplying locations. The antioxidant activity values of pollens were found partly similar and varied depending on locations. The content of saturated fatty acid (palmitic) was high (20-30%) in the tested pollen samples but did not exceed the content of linoleic acid.Öğe Determination of Bioactive Compounds and Mineral Contents of Seedless Parts and Seeds of Grapes(SOUTH AFRICAN SOC ENOLOGY & VITICULTURE-SASEV, 2017) Özcan, Mehmet Musa; Al Juhaimi, Fahad Y.; Gülcü, Mehmet; Uslu, Nurhan; Geçgel, U.In this study, phenolic compounds, minerals, total flavonoids, total phenolic contents and antioxidant activities of the seedless parts (pulp+skin) and seeds of table and wine grapes were determined. Also, the total oil, tocopherol contents and fatty acid composition of seed oils of table and wine grapes were investigated. The highest total phenolic content of the grape pulp was found in Trakya ilkeren (199.063 mg/100 g), while total flavonoid and antioxidant activity of the pulp was determined at a high level in Red Globe (6.810 mg/g, 90.948%). Antioxidant activity, and the total phenolic and flavonoid contents of grape seeds varied between 86.688 and 90.974%, 421.563 and 490.625 mg GAE/100 g, and 90.595 and 145.595 mg/g respectively (p <0.05). Generally, the main phenolic compounds of all grape pulps and seeds were gallic acid, 3,4-dihydroxybenzoic acid, (+)-catechin and 1,2-dihydroxybenzene. In addition, the oil contents of grape seeds ranged from 5.275 (cavus) to 13.881% (Cmarh karasi) (p < 0.05). The major fatty acids of grape seed oils were linoleic, oleic and palmitic acid. The seed oil of the Trakya ilkeren variety was rich in tocopherols in comparison with the other varieties. The major minerals of both the seedless parts and the seeds were determined as K, Ca, P, S, Mg.Öğe Determination of heavy metals in bee honey with connected and not connected metal wires using inductively coupled plasma atomic emission spectrometry (ICP-AES)(SPRINGER, 2012) Özcan, Mehmet Musa; Al Juhaimi, Fahad Y.Two honey samples are taken from two parts of the same honeycomb: one that contacts to the surface of the wire and the other taken from the surface that does not contact the wires. Heavy metal contents of these two samples were determined by inductively coupled plasma atomic emission spectrometry). The Mo, Cd, Cr, Fe, Mn, Ni and Zn contents of the honey in contact with wire is higher when compared to the other. Especially, Fe and Zn contents of honey in contact with wire is much higher than the non-contact one. These values are, respectively, 190.21 and 112.76 ppm. Besides, Ni content of honey in contact with wire is approximately 50% higher.Öğe Determination of physicochemical properties of multifloral honeys stored in different containers(WILEY, 2018) Al Juhaimi, Fahad Y.; Özcan, Mehmet Musa; Ghafoor, Kashif; Babiker, Elfadil E.In comparison with the initial values, acidity and 5-(hydroxy-methyl)-2-furaldehyde (HMF) values of all honey samples increased during storage. The total phenol contents of honey were decreased from 286.2 to 108.6 mg GAE/kg during 9 months of storage in white colored container. In addition, total phenol contents of honey sample stored in tin container ranged from 294.7 to 258.6 mg GAE/kg (p < .05). While radical scavenging activity values of honey samples stored in amber colored container during storage are measured as 78.6 g/L, IC50, 77.9 g/L, IC50, and 76.1 g/L, IC50, these activity values were determined as 84.9 g/L, IC50, 80.7 g/L, IC50, and 75.2 g/L, IC50 in tin container (p < .05), respectively. While acidity values of honey samples stored in white bottle range from 23.6 (3th month) to 25.7% (9th month), it varied from 20.6 (3th month) to 21.6% (9th month) in honey sample stored in amber colored container during storage. Practical applicationsDifferent honeys are produced in different parts of Turkey. The known honeys are pine, citrus, and chestnut honey. Various flower honeys are produced in these and other regions. HMF formation is considered as a bed result of storage and heating.Öğe Determination of some mineral contents of prickly pear (Opuntia ficus-indica L.) seed flours(SPRINGER, 2013) Al Juhaimi, Fahad Y.; Özcan, Mehmet MusaThe aim of this study was to determine some mineral contents of prickly pear (Opuntia fA +/- cus-indica L.) seeds collected from different locations. The mineral contents of seeds were established by inductively coupled plasma atomic emission spectrometry. All the seeds contained Ca, K, Mg and P at high levels. Calcium content ranged between 268.5 (sample no. 11) and 674.8 ppm (sample no. 4). The level of K changed between 346.7 (sample no. 1) and 676.1 ppm (sample no. 13). Phosphorus content of seeds varied between 1,173.6 (sample no. 14) and 1,871.3 ppm (sample no. 1). It is apparent that seeds are good sources of the macro and micro minerals and can be consumed as a food ingredient to provide nutrition.Öğe Distribution of heavy metal and macroelements of Indian and imported cigarette brands in Turkey(SPRINGER HEIDELBERG, 2019) Özcan, Mehmet Musa; Al Juhaimi, Fahad Y.; Uslu, Nurhan; Ghafoor, Kashif; Ahmed, Isam A. Mohamed; Babiker, Elfadil E.While Cd contents of cigarettes are determined between 0.44 (C8) and 1.55 mg/kg (C7), Co contents of cigarette samples varied between 0.26 (B5) and 2.19 mg/kg (B3). Also, while Cr contents of tested cigarettes are determined between 0.88 mg/kg (C5) and 1.72 mg/kg (B2), Mo contents of cigarettes ranged from 0.39 (C7) to 1.13 mg/kg (B2). In addition, Cu contents of cigarettes varied between 10.36 (C11) and 30.47 mg/kg (C18), while Fe contents of cigarette samples range between 306.03 (C5) and 595.42 mg/kg (C16). In addition, while Ni contents of cigarettes vary between 1.00 (C7) and 3.17 mg/kg (C1), Pb contents of brands varied between 0.16 (B4) and 7.37 mg/kg (B1). In general, Indian and imported cigarette samples used in Turkey are rich in Ca, K, Mg, P, and S. In Indian samples, B4 and B5 cigarette samples contained lower heavy metals compared with other cigarettes.Öğe Effect of date (Phoenix dactylifera L.) seed extract on stability of olive oil(SPRINGER INDIA, 2015) Özcan, Mehmet Musa; Al Juhaimi, Fahad Y.In this study, the antioxidant effect of date (Phoenix dactylifera L., Arecaceae) seed extracts at different concentrations (0.5 %, 1.0 % and 1.5 %) on the oxidative stability of olive oil at 60 degrees C was determined. Butylated hydroxyanisole (BHA) was used as positive control in the experiment. All extracts exhibited antioxidant activity compared to BHA up to 21 days. When antioxidant effect of extract concentrations were compared with BHA, the effect of 0.5 % extract concentration was more remarkable for olive oil up to 21 days. After 14 days of assay, all of seed extracts was effective at 60 degrees C in comparison with control. On the other hand, an important increase was observed in both the peroxide and free fatty acidity values during the experiment period. It concluded that date seed extract could be used as a oxidative inhibitor agent in oil and oil products.
