The effects of microwave heating for 3, 6, and 9 min at a frequency 2450 MHz on fatty acid composition, tocopherols, iodine value, free acids (%), peroxide conjugated dienes trienes, hexanal contents refined hazelnut, soybean, sunflower, virgin olive oils were investigated. A significant (p < 0.05) decrease was observed in linoleic linolenic soybean oil during exposure to heating. Tocopherol samples significantly decreased Free the slightly increased value showed reduction throughout...

Abstract Safflower oil‐based oleogels were produced from beeswax and rice bran wax. Oleogels demonstrated higher oxidative stability than shortening at the cooking temperature. Peroxide values in shortening, wax oleogels, samples found range of 4.8–27.76, 13.21–20.45 4.30–7.72 meqO 2 kg −1 oil. Following oleogelation, there was no significant change fatty acid composition safflower In addition, after baking process, changes major acids not determined to be significant. Solid fat content...

ABSTRACT The effect of interesterification on oxidative stability cottonseed, palm and soybean oils stored under oven conditions at 45, 60 75C was evaluated by measuring the peroxide values (PV), anisidine (AV) Totox different time intervals. Fatty acid composition tocopherol contents oil samples were determined before after interesterification. Interesterification reduced content oils. interesterified showed lower PV AV than their non‐interesterified counterparts in all temperatures primary...

Abstract In this study, safflower oil oleogels were made using propolis wax and carnauba in three different concentrations each, their effectiveness as a fat substitute cake was evaluated afterward. Oleogels' oxidative stability characterization looked into. oleogels, the binding capacity, solid content, crystallization time all assessed. The cakes underwent an examination for moisture texture, sensory evaluation. Additionally, analyses of fatty acid composition, free acidity, (peroxide...

Abstract Kofter is a traditional product which composed of water, molasses and starch. The quality depends on many factors involving concentration the ingredients, starch type, composition type drying temperature time. In present study, effect (75–25%) pasting textural properties samples was investigated. All (peak viscosity, trough breakdown final setback peak time, temperature) were significantly affected by used in formula. increase water generally caused hardness, adhesiveness, gumminess...

Four different corn oil samples including stripped (SCO, Control), refined (RCO), enriched with rosemary extract (SCO+ROS) and ascorbyl palmitate (SCO+AP) were exposed to microwave (MWH) conventional heating (CVH). For both methods, peroxide value (PV) conjugated dienes increased at up 230 °C, which temperature hexanal (HEX) trienes started increase instead. Kinetic analysis revealed that PV HEX formation first ordered the reaction rate among was as follows: Control &gt; SCO+ROS RCO SCO + AP...

Crude oil yield, fatty acid composition, volatile compounds, antioxidant activity and some characteristics of Cephalaria syriaca seeds collected from different locations in Turkey were studied. Antioxidant capacity was determined by DDPH ABTS tests the results range 18.8-67.3% 0.0-41.8 mmol Trolox eq g-1 DW, respectively; while total phenolic contents between 4339-11907 mg GAE kg-1. The average α-tocopherol content found to be 54-467 Oil yield 11.2-24.0%. Oleic linoleic acids predominant...

In this study, it was aimed to determine the 3-MCPD and glycidol levels in 9 types (46 brands) of edible fat oil offered for sale markets located Türkiye. were determined by making some modifications DGF C VI 18 (10) method. The highest detected hazelnut oils, riviera olive margarines, shortenings. As expected, these contaminants not observed extra-virgin while they at low fish oils. found range 0.06-2.12 mg·kg-1 oil, 0.16-1.69 0.17-1.17 margarines. shortenings 1.98-6.46 mg·kg-1, followed...

Aims: The aim of this study was to determine and compare the potential Centaurea albonitens balsamita seeds as alternative raw materials for edible oil production natural antioxidant sources.&#x0D; Study Design: C. were harvested from district Van province during harvest-maturity period in August-September 2017. plants identified by a biologist, Prof. Dr. Murat ÜNAL. Voucher specimens (B5495, MÜ68611) deposited at Virtual Herbarium Lake Basin, Yüzüncü Yil University, Faculty Education.&#x0D;...

Frying process was repeatedly carried out 12 times in a deep fryer at 180°C using palm olein oil with potatoes. The effect of frying on the chemical and physical properties has been investigated. Free fatty acidity (0.35%–1.39%), peroxide value (0.64–11.49 meqO2/kg), p-anisidine (5.06–67.52), total oxidation (7.66–91.11), conjugated diene (2.84–11.09) triene (1.07–5.65), polar matter, viscosity (17.64–140 mPa s) analyses were performed samples. In addition, uckun (Rheum ribes L.), quinoa...

The crude oil contents, total phenolic volatile components and antioxidant activities of Onopordum anatolicum heteracanthum species seeds were investigated. In addition, the fatty acid profile, tocopherol peroxide values, free acidity color values oils obtained from determined. contents O. found to be 15.84% 12.54%, respectively. Total as 18554 13015 mg-GAE kg-1. DPPH (% inhibition) in studied BHT determined 84.41, 66.73, 86.92% ABTS 121.18, 46.90, 123.78 mmol Trolox eq. g-1. Linoleic (49.38...

Abstract The purpose of this study was to assess volatile component profiles and the antioxidant activity propolis samples from eight different locations in Türkiye. α‐Pinene, β‐pinene, 3‐carene, limonene, 2‐acetylfuran, benzaldehyde, acetic acid, benzoic longifolene, isopentyl acetate, m‐cymene, styrene, δ‐cadinene were most common components found samples. Principal analysis (PCA) hierarchical cluster performed on gas chromatography–mass spectrometry (GC–MS) data identify trends clusters...

Abstract Propolis, a natural resinous substance collected by bees, is known for its potent antioxidant properties. This study investigates the activities and total phenolic contents of propolis samples from 16 provinces Türkiye their effects on oxidative stability sunflower oil. The 1,1‐diphenyl‐2‐picrylhydrazyl (DPPH) inhibition was in range 28.1%–92.5% thirteen samples, whereas this rate 24.5% butylated hydroxytoluene (BHT). Although 2,2′‐azino‐bis(3‐ethylbenzotiazolin‐6‐sulfonic acid)...

This study aimed to evaluate the volatile component profiles and antioxidant activities of propolis samples collected from eight regions Türkiye. The total phenolic content (TPC) was found vary between 5333 36967 mg GAE/100 g. 2.2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activityof varied 10.9 92.2%, while 2.2-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS) activity 193.8 1026.0 µmol trolox/g. Six exhibited higher than butylated hydroxytoluene (BHT)....

Bu çalışmada farklı markalardan oluşan kahvaltılık margarinler (K1, K2, K3, K4 ve K5) mutfak margarinleri (M1, M2, M3, M4 M5), 4 25°C sıcaklıklarda 12 hafta süreyle depolanmıştır. Depolama süresince her 2 haftada bir numune alınarak, tokoferol içeriği, peroksit sayısı (PS), tiyobarbütirik asit (TBA), konjuge-dien (K232) yağ asidi bileşimlerinde meydana gelen değişimler tespit edilerek, margarinlerin oksidatif stabiliteleri değerlendirilmiştir. Çalışmada kullanılan margarin örneklerinde...

In this study, some deterioration parameters were determined in nine different types of edible fats and oils (46 samples) obtained from the Turkish market, their compliance with Food Codex Standards was evaluated compared literature. Six samples including (3 margarines, 2 shortenings 1 riviera olive oil) had peroxide value (PV) that exceeded codex limit. The highest PVs found to be fish (8.5-27.4 meqO2/kg), peanut (9.2-32.1 meqO2/kg) extra virgin (10.37-17.66 meqO2/kg). Free fatty acidity...

Bu çalışmanın amacı, 7 farklı bitki ekstraktının ayçiçek yağında oksidasyonu engelleme performanslarını değerlendirmektir. Farklı ekstraktları ilave edilmiş ayçiçeği yağı örnekleri, 25, 50 ve 75 °C’lerde 21 gün süre ile hızlandırılmış oksidasyona tabi tutulmuştur. Depolama öncesi, 7., 14. 21. günlerde numuneler alınarak peroksit değeri (PD), malondialdehit (MAD), konjuge dien (K232) trien (K270) analizleri yapılmıştır. Ayrıca antioksidan olarak kullanılan maddelerin aktiviteleri DPPH (EC50)...

While the world is fighting against SARS-CoV-2, this virus continues to mutate around world, infecting with new variants and causing death of people. According World Health Organization (WHO) data, there were over 255 million confirmed cases more than 5 deaths globally as November. To date, approximately 7.4 billion doses vaccine have been administered. However, no therapeutic drugs found yet. By considering a significant part global population remains unvaccinated potential constantly...

Bu çalışmada sıcaklık (30, 50 ve 70 °C), süre (0, 10 20 gün), bakır demir iyonu derişimleri 0.15 0.3 mg/kg yağ), askorbil palmitatın (AP) 200 400 yağ) soya yağının peroksit değeri (PD), malonaldehit (MAD) hegzanal (HEX) içerikleri üzerindeki etkileri hızlandırılmış oksidasyon ortamında yanıt yüzey yöntemi (YYY) ile araştırılmıştır. Soya zengin linoleik asit (C18:2) içeriği (%55.81) birlikte %8.69 oranında linolenik asite (C18:3) sahip olduğu saptanmıştır. Toplam tokoferol 538.5 yağ olarak...

In this study, oleogels based on safflower oil were produced from beeswax and rice bran wax at different ratios. It was aimed to produce cakes with high level of unsaturated fatty acids by using these as a shortening replacer. The characterization oxidative stability investigated. Oil binding capacity (OBC), solid fat content (SFC) crystallization time (CT) determined in oleogels. Moisture content, pH, texture sensory analysis performed the cakes. addition, acid composition, free acidity,...