Korkmaz, Aziz

Korkmaz, Aziz

Job Title

Doçent

Email Address

azizkorkmaz@artuklu.edu.tr

Main Affiliation

Department of Nutrition and Dietetics/ Beslenme ve Diyetetik Bölümü

Sustainable Development Goals Report Points

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Scholarly Output

15

Articles

11

Citation Count

220

Supervised Theses

0 Scholarly Output Search Results

Now showing 1 - 10 of 15

Citation - WoS: 14
Citation - Scopus: 14
Evaluation of fatty acids, free fatty acids and textural properties of butter and sadeyag (anhydrous butter fat) produced from ovine and bovine cream and yoghurt
(ScienceDirect, 2022) Korkmaz, Aziz; Yıldız Akgül, Filiz; Korkmaz, Aziz; Atasoy, Ahmet Ferit; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik Bölümü
Fatty acids (FAs), free fatty acids (FFAs) and textural characteristics were determined in butter and sadeyag (anhydrous butter fat) manufactured from ovine and bovine cream and yoghurt. The samples made from cream and yoghurt had similar FA and FFA profiles and textural properties. Ovine milk fat products had higher short- and medium-chain saturated fatty acid (SFA) content, while samples made with bovine milk fat had higher long-chain SFA content. Ovine milk fat samples contained higher levels of capric, myristic, stearic and oleic acids and lower levels of butyric and caproic acids than bovine milk samples. Bovine milk fat products had firmer and poorer spreadability, and lower adhesiveness than ovine milk fat products. Polyunsaturated fatty acid (PUFA) content of butter was higher than that of sadeyag. Sadeyag was firmer and less spreadable than butter. Textural characteristics of the milk fat products depended on the FA composition of the samples.
Mardin İlinde Üzüme Dayalı Gıda Sanayisini Geliştirme Olanakları
(Mardin Artuklu Üniversitesi Yayınları, 2022) Doğan, Yusuf; Korkmaz, Aziz; Department of Plant Protection / Bitki Koruma Bölümü; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik Bölümü
Bu bölümde tespit edilen sorunlar ve bunlara önerilen çözümlerin benzerleri, bağcılıkla ilgili ülkemiz geneli veya başka bölgelerimiz için daha önce gerçekleştirilmiş birçok çalışma, forum, çalıştay veya araştırmada da dile getirilmiştir. Mardin özelinde, üzüme dayalı yöresel ürün sanayisinin geliştirilmesine dönük önerilen çözümler, genel olarak teknik ve mali başlıklar altında sınıflandırılabilir. Bu çözümlerden bir kısmı işletmecileri de ilgilendirmekle beraber bunların çoğu kamu kurumları sorumluluğundadır. Dolayısıyla, kırsal kalkınma planlamalarımızda veya ilgili yatırım programlarımız bünyesinde öncelikle bu önerilere hizmet edebilecek uygulama stratejilerinin geliştirilmesi esastır. Aksi halde, bu çözüm önerileri tavsiye olmaktan öteye geçemeyecektir.
Citation - WoS: 4
Citation - Scopus: 4
Evaluation of Extra Virgin Olive Oil Compounds Using Computational Methods: in Vitro, Admet, Dft, Molecular Docking and Human Gene Network Analysis Study
(Bmc, 2025) Unsal, Velid; Yildiz, Resit; Korkmaz, Aziz; Mert, Basak Dogru; Caliskan, Cemile Gunbegi; Oner, Erkan; Yıldız, Reşit; Unsal, Velid; Korkmaz, Aziz; Günbegi Çalışkan, Cemile; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik Bölümü; Department of Medical Services and Techniques / Tıbbi Hizmetler ve Teknikleri Bölümü
This study investigates the phenolic compounds (PC), volatile compounds (VC), and fatty acids (FA) of extra virgin olive oil (EVOO) derived from the Turkish olive variety "Sar & imath; Ulak", along with ADMET, DFT, molecular docking, and gene network analyses of significant molecules identified within the EVOO. Chromatographic methods (GC-FID, HPLC) were employed to characterize FA, PC, and VC profiles, while quality parameters, antioxidant activities (TAC, ABTS, DPPH) were assessed via spectrophotometry. The analysis revealed a complex composition of 40 volatile compounds, with estragole, 7-hydroxyheptene-1, and 3-methoxycinnamaldehyde as the primary components. Hydroxytyrosol, tyrosol, oleuropein, apigenin, ferulic acid, and vanillic acid emerged as main phenolic constituents, with hydroxytyrosol and apigenin exhibiting high bioavailability. Molecular docking highlighted oleuropein and pinoresinol as compounds with strong binding affinities, though only hydroxytyrosol, apigenin, and pinoresinol fully met Lipinski and other drug-likeness criteria. DFT analysis showed that oleuropein and pinoresinol have notable dipole moments, reflecting polar and asymmetrical structures. KEGG enrichment analysis further linked key molecules like oleuropein and apigenin with pathways related to lipid metabolism and atherosclerosis, underscoring their potential bioactivity and relevance in health-related applications.
Bioactive Properties of Some Local And Foreign Olive Oils
(2023) Korkmaz, Aziz; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik Bölümü
Nutrition profile is critical for a healthy life. In particular, some components in certain foods can directly affect human health by showing biological activity (bioactive) in the body. In this context, extra virgin olive oil is a food that has recently gained importance due to its positive effects on health. In this study, phenolic compound profiles (oleuropein, hydroxytyrosol, tyrosol, catechin, pinoresinol, luteolin, apigenin, caffeic acid, vanillic acid, t-ferulic acid, and p-coumaric acid), total phenolic content (TFC) and total antioxidant capacity (TAC) of 5 different extra virgin olive oils obtained from different olive varieties (Domat, Uslu, Arbequina, Taggiasca, Koroneiki) were investigated. The amounts of the individual phenolic compound in the oil samples were determined by a high-pressure liquid chromatography system (HPLC), while TFC and TAC were determined by using spectrophotometric methods. Hydroxytyrosol, as the major phenolic compound, was found at the highest content (129.375 mg/kg) in Koroneiki olive oil, whereas its lowest (14.485 mg/kg) content was found in Domat olive oil (P<0.05). Koroneiki olive oil also showed the highest content for tyrosol, while Uslu and Arbequina olive oils had the lowest contents for this compound (P<0.05). For pinoresinol, the maximum contents were found in Domat (16,817 mg/kg) and Koroneiki (15,160 mg/kg) samples, whereas the Uslu oils (5,260 mg/kg) exhibited the minimum content. Phenolic acids were found at minor levels in all samples. According to the spectrophotometric results, although the TFC level in Koroneiki olive oil was the highest (294.822 mg gallic acid equivalent (GAE)/kg), this value was not statistically different from the values in Domat (259.950 mg GAE/kg) and Uslu (284.267 mg GAE/kg) oils (P>0.05). Similarly, the difference between the TFC of Arbequina (208.962 mg GAE/kg) and Taggiasca (219.526 mg GAE/kg) oils were not significant (P>0.05). The results of TAC demonstrated that Koroneiki oil showed the highest (110.396 mg trolox equivalent (TE)/kg) value for antioksidan aktivity, while Taggiasca oil showed the lowest (58.465 mg TE/kg) value (P<0.05). The results of this study show that the investigated bioactive properties can be used as a distinguishing feature for olive oil from different olive varieties.
Mardin’e Ait Yerel Bir Potansiyeli Harekete Geçirme; Derik Zeytinciliğini Geliştirme Eylem Planı
(Mardin Artuklu Üniversitesi, 2023) Korkmaz, Aziz; Atasoy, Ahmet Ferit; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik Bölümü
Derik ilçesi başta olmak üzere Mardin’in birçok yerinde zeytinin ve zeytinyağının uzun bir geçmişi bulunmaktadır. Ancak, günümüzde burada zeytincilikte yeteri kadar katma değer oluşturulamamaktadır. Zeytincilik, Derik özelinde yerel kurumların koordinasyonu ve desteğiyle başlatılacak uygun hamlelerle kırsal kalkınmaya önemli katkılar sağlayabilecek bir potansiyeli barındırmaktadır. Bu bölümde Derik zeytininin; üretimi, işlenmesi, markalaşması ve yanı sıra ilçedeki çiftçilerin örgütlenmesi ile ilgili sorunlar tespit edilmekte ve bunlara yönelik çözüm önerilerinde bulunulmaktadır. Söz konusu sorunların-çözümlerin, bu ürünün geliştirilmesine yönelik etkili projelerin geliştirilmesinde referans olarak kullanılabileceği öngörülmektedir. Ayrıca bölüm sonuçlarının, yerel tarım ürünlerine ilişkin politika belirleyicilerine ve/ya karar vericilere de yol gösterici olabileceği düşünülmektedir.
Citation - WoS: 28
Citation - Scopus: 28
The effects of production methods on the color characteristics, capsaicinoid content and antioxidant capacity of pepper spices (C. annuum L.)
(Food Chemistry, 2021) Korkmaz, Aziz; Atasoy, Ahmet Ferit; Hayaloglu, Ali Adnan; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik Bölümü
The effects of production methods for red pepper flakes (RPF) and traditional (TRI) and industrial (INI) isot spices were evaluated with respect to the carotenoid and capsaicinoid contents, extractable color (ASTA color), surface color parameters, nonenzymatic browning (NEB), and the DPPH free radical-scavenging capacity of fresh red Capsicum (FRC). The measured characteristics were significantly affected by the processing methods used. RPF exhibited the highest antioxidant activity and best color quality in terms of carotenoid content, which was the highest; ASTA value; surface color intensity; and NEB, which was the lowest. In contrast, INI-processing methods resulted in poor color quality, causing the maximum increase in NEB. The concentration of capsaicinoid increased at the end of TRI processing, whereas it decreased in the two other methods. These results suggest that the traditional production method for isots prevents excessive destruction of their color attributes and contributes to the desirable characteristic browning.
Citation - WoS: 2
Citation - Scopus: 2
The effects of different concentration methods on the chemical composition, functional and sensory attributes of molasses produced from grape (Vitis vinifera L.) juice
(SpringerLink, 2023) Korkmaz, Aziz; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik Bölümü
The efects of concentration by outdoor (OCM) and vacuum (VCM) and traditional (TCM) methods for the production of molasses from fresh grape juice (FGJ) were evaluated concerning volatile compounds, sugars, organic acids, hydroxymethylfurfural (HMF), total phenolic (TPC), total favonoid (TFC) contents, and antioxidant capacity (TAC), and sensory properties. Compared to FGJ, its molasses had lower TPC, TFC, TAC, and total organic acids and total sugars (except for the OCM) in total soluble solids (TSS). Additionally, the most of (60.7%) volatile compounds in FGJ disappeared with the production of the molasses. Moreover, all investigated features were signifcantly infuenced by the concentration method used. The TCMconcentration method markedly increased the amounts of both HMF (~ 180- and 50-fold greater than of the OCM and TCM, respectively) and total volatile furans (~20- and 3.6-fold greater than that of OCM and TCM, respectively). Additionally, this method presented the best antioxidant properties in terms of greater TPC, TFC, and TAC, whereas both TPC and TFC in the molasses produced by the OCM-method were not signifcantly diferent from those they obtained by the VCM-method. The principal component analysis (PCA) based on the chemical characteristics revealed close similarity between the OCM and VCM, even though the OCM had higher contents for sugars and organic acids. According to the sensory evaluation, there were no signifcant diferences between the scores of favor and overall acceptability for the TCM and OCM. In conclusion, an adapted the OCM-concentrating method to industrial-type can be proposed to produce high-quality molasses.
Depolama sıcaklığı, depolama süresi ve zeytinyağı ilavesinin pul kırmızıbiberin bazı özellikleri üzerine etkisi
(Harran Üniversitesi, 2022) Korkmaz, Aziz; Karakuş, Mehmet Şükrü; Atasoy, Ahmet Ferit; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik Bölümü
Bu çalışmada, geleneksel yöntemlerle üretilen pul kırmızıbiberlerin pH, titrasyon asitliği ve renk değerlerine (L*, a*, b*, C* ve h°) depolama sıcaklığı, depolama süresi ve zeytinyağı ilavesinin etkileri araştırılmıştır. Depolama sıcaklığı pul kırmızıbiberlerin pH, titrasyon asitliği, L*, a*, b* ve C* değerleri üzerine etkisi çok önemli bulunmuştur (P<0.001). Pul kırmızıbiberlerin pH, titrasyon asitliği, L*, a*, b*, C* ve h° değerleri üzerine depolama süresinin çok önemli olduğu belirlenmiştir (P<0.001). Zeytinyağı ilavesi, pul kırmızıbiberlerin titrasyon asitliği, L*, b*, C* ve h° değerleri üzerine P<0.001 düzeyinde etkili olmuştur. Çalışma sonuçları, pul kırmızıbiberlerin renk kalitesini artırmak amacıyla zeytinyağının ilave edilebileceğini göstermektedir. Ayrıca renk kalitesinin uzun süre korunabilmesi içinde +4 oC’de depolanması gerektiği sonucuna ulaşılmıştır.
Citation - WoS: 1
Citation - Scopus: 1
Volatile profile, textural and sensory properties of Diyarbakır Örgü cheese produced from sheep and cow milk of different ripening time
(Mljekarstvo, 2023) Hatipoğlu, Abdulkerim; Korkmaz, Aziz; Çelik, Şerafettin; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik Bölümü
Diyarbakır Örgü (knitted) cheese (DOC) is a semi-fat, hard, and a pasta-filata type cheese. The objective of this study was to evaluate volatile organic compounds (VOC), and textural and sensory properties of DOC during the 120-day maturation period. For this purpose, a total of 5 different cheeses were produced as 100 % sheep’s milk (C1), 100 % cow’s milk (C2), 90 % sheep’s milk + 10 % cow’s milk (C3), 80 % sheep’s milk + 20 % cow’s milk (C4), and 70 % sheep’s milk + 30 % cow’s milk (C5). Volatile compounds increased, both qualitatively and quantitatively, along with the increase of the percentage of sheep milk used in the cheese production increased. At the beginning of ripening, the total amount of VOC in the DOC obtained from sheep’s milk was 3.27-fold greater than that of the produced cow’s milk, while this ratio increased to 4.57 at the end of ripening. The total VOC contents of all the DOC reduced along the ripening and decreased by 53.37, 64.92, 15.53, 51.81, and 64.84 % for C1, C2, C3, C4, and C5, respectively. As the amount of cow’s milk used in DOC production increased, the values of all textural properties (hardness, adhesiveness, springiness, cohesiveness, gumminess, and chewiness) of the cheese increased too. On the other hand, these values decreased with the maturation (p<0.05). The rates of decrease in hardness (N), adhesiveness (N.s), springiness (cm), cohesiveness, gumminess (N), and chewiness (mJ) values of the cheese groups with the storage were C1>C3>C2>C4>C5, C4>C1>C5>C2>C3, C2>C1>C3>C4>C5, C3>C2>C1>C5>C4, C1>C4>C3>C2>C5 and C3>C4>C1>C5>C2, respectively. In terms of sensory properties (colour, texture and, taste-aroma) of the cheese mature C2, mature C1 and 30-day ripened C1 cheese samples were preferred more, respectively.
Citation - WoS: 28
Citation - Scopus: 28
The effects of production methods on the color characteristics, capsaicinoid content and antioxidant capacity of pepper spices (C. annuum L.)
(Elsevier, 2021) Korkmaz, Aziz; atasoy, Ahmet Ferit; Hayaloğlu, Ali adnan; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik Bölümü
The effects of production methods for red pepper flakes (RPF) and traditional (TRI) and industrial (INI) isot spices were evaluated with respect to the carotenoid and capsaicinoid contents, extractable color (ASTA color), surface color parameters, nonenzymatic browning (NEB), and the DPPH free radical-scavenging capacity of fresh red Capsicum (FRC). The measured characteristics were significantly affected by the processing methods used. RPF exhibited the highest antioxidant activity and best color quality in terms of carotenoid content, which was the highest; ASTA value; surface color intensity; and NEB, which was the lowest. In contrast, INI-processing methods resulted in poor color quality, causing the maximum increase in NEB. The concentration of capsaicinoid increased at the end of TRI processing, whereas it decreased in the two other methods. These results suggest that the traditional production method for isots prevents excessive destruction of their color attributes and contributes to the desirable characteristic browning.