Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Uzun, Sevda(87)
- Merdan, Mehmet(70)
- Duran, Celal(56)
- Baltaci, Cemalettin(52)
- Kulakaç, Nurşen(51)
- Ozdes, Duygu(51)
- Kaygusuz, Abdullah(47)
- Öztürk, Serkan(42)
- Demir, Selim(40)
- Karsli, Orhan(37)
- Turan, Ibrahim(37)
- Dokuz, Abdurrahman(36)
- Gücer, Mehmet Ali(36)
- Sipahi, Ferkan(36)
- Araz, Onur(35)
- Kandemir, Raif(31)
- Vural, Alaaddin(31)
- Topal, Fevzi(30)
- Kurt, Kemal(29)
- Ürkek, Bayram(29)
- Maden, Nafiz(28)
- Acet, Tuba(27)
- Alemdag, Selcuk(26)
- Arslan, Mehmet(26)
- Ayaydin, Hasan(26)
- Akaryali, Enver(25)
- Aydin, Faruk(25)
- Baltacı, Cemalettin(25)
- Yücel, Cem(25)
- Akar, Zeynep(24)
- Barut, Abdulkadir(24)
- Ozturk, Samet(24)
- Pala, Fahrettin(24)
- Peker, Iskender(24)
- Topal, Meryem(24)
- Yildiz, Salih(24)
- Öz, Mehmet(24)
- Aliyazicioglu, Yuksel(23)
- Bostan, Sedat(23)
- Kankal, Murat(23)
Yayınlar
- MakaleYalnız künye2015Scopus SJRQ3Magnetic Relaxation in a Y 0.5Lu0.5Ba2Cu3O y Superconductor at Various Magnetization Levels
Çelebi, S.; Ozturk, A.; Uysal, E.; Kutuk, S.; Duzgun, I.
The evolution of the rate of flux creep along the major hysteresis envelopes in a Y0.5Lu0.5Ba2Ca3Oy sample synthesized by a modified melt powder melt growth (MPMG) method at 25 K has been investigated. Magnetic relaxation rates depend strongly on the prior magnetic history. Calculations based on the critical state model can reproduce quite well the experimental data for magnetization when we have chosen the field exponent n = 0.3 in critical current density, Jc(Ha) = Jc0/(Ha−IM)n, where IM = Ha when 0 < H < Hc1 and (Formula presented.) when Ha ≥ Hc1. Using the field-cooled magnetization MFC data as well as the comparison of experimental and calculated M–H hysteresis loop, we estimated Hc1 = 500 Oe, p = 0, and the penetration field H∗ = 20 kOe. The apparent pinning energy was estimated as 62 meV for the remanent magnetization upon an excursion of 40 kOe.
- MakaleYalnız künye2015Scopus SJRQ4An integrated evaluation model for service quality of hospitals: A case study from Turkey
Baki, Birdogan; Peker, Iskender
In this paper, an integrated approach, in which Fuzzy Analytic Hierarchy Process (FAHP) and Fuzzy TOPSIS (FTOPSIS) is used, is proposed to rank the hospitals according to service quality from the patient's point of view. The FAHP is employed to determine the weights of service quality criteria for the hospitals, and FTOPSIS method is used to rank the hospitals. Empirical results show that when "reliability" is the most important criterion, "empathy" is the least important criterion in terms of hospital service quality. A sensitivity analysis is also applied to check how sensitive our model is to changes in the various criteria weights.
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İncele - MakaleYalnız künye2015Scopus SJRQ3Hessenberg matrices and the Pell-Lucas and Jacobsthal numbers
Aktaş, Ibrahim; Köse, Hasan
There are many relationships between the number theory and matrix theory. In this work, we defined two upper Hessenberg Matrices and then we showed that the permanents of these Hessenberg matrices are Pell-Lucas and Jacobsthal numbers.
AtıfScopus1İncele - MakaleAçık Erişim2015Scopus SJRQ2Simultaneous separation and preconcentration of Cd(II), Co(II), and Ni(II) ions in environmental samples by carrier element-free coprecipitation method prior to their flame atomic absorption spectrometric determination
Duran, Celal; Ozdes, Duygu; Akcay, Hakki Turker; Serencam, Huseyin; Tufekci, Mehmet
ABSTRACT: In the present study, Cd(II), Co(II), and Ni(II) ions were separated and preconcentrated via carrier element-free coprecipitation (CEFC) method by using an organic coprecipitating agent, 1,2-bis-(2-tosyl ethoxy) benzene (BTEB), prior to their flame atomic absorption spectrometric (FAAS) detections. The experimental conditions were optimized in terms of pH of the aqueous solution, BTEB amount, standing time, centrifugation rate and time, and sample volume. Under the optimum experimental conditions, the detection limits for Cd(II), Co(II), and Ni(II) ions were found to be 0.13, 0.67, and 0.46 μg L−1, respectively, and the relative standard deviations for the analyte ions were found to be lower than 4.0%. The accuracy of the method was tested by analyzing certified reference material and spike tests. The method was applied to determine the levels of Cd(II), Co(II), and Ni(II) ions in sea and stream water, macaroni, red lentil, and cracked wheat samples.
AtıfScopus17WoS16OpenAlex16İncele - MakaleYalnız künye2015Scopus SJRQ2Determination to Results of Forest Management Planning Applications with Land Use Changes from 1971 to 2008 in Yalova-Turkey
Çakir, Günay; Özdemir, Mehmet
The forest conservation organizations in Turkey have recommended changing the classical forest management systems to protect forest biodiversity since 2006. This study discusses the spatio-temporal analysis of forest management activities and land use changes in Yalova Forest Ecosystems, Turkey. We focused on the Yalova City because (a) it is located in a highly urbanized area, northwestern Turkey, (b) forest is a governmental ownership and producing of many non-wood forest product and wildlife species, (c) governmental organizations are encouraged to be decreased clear-cuts to protect forest ecosystems; (d) GIS databases are available in Yalova; (e) Yalova Forestry Administration has a membership of the Mediterranean Model Forest Network in 2011, and (f) many new forest policies will be developed in Turkey after the membership of the model forest. This study used forest management plans of Yalova Forest during 1971–2008 periods and analyzed data in geographic information system (GIS). Results showed that the rate of forest area in the Yalova steadily increased from 53.4 % in 1971 to 61.2 % to 62.5 % between 1994 and 2008 respectively.
AtıfScopus2WoS3OpenAlex2İncele - MakaleYalnız künye2015Scopus SJRQ3Gelfand numbers of diagonal matrices
Ismailov, Z.I.; Cona, L.; Çevik, E. Otkun
In this work, a connection between Gelfand numbers of infinite diagonal matrix with linear bounded operator-elements in the direct sum of Banach spaces and its coordinate operators has been investigated.
AtıfScopus5WoS3OpenAlex3TR Dizin3
İncele - MakaleYalnız künye2015Scopus SJRQ4The effects of the CSR isomorphism on both CSP and CFP
Ilhan-Nas, Tülay; Koparan, Emrah; Okan, Tarhan
Purpose – The purpose of this study is to contribute to the understanding of the interrelationships between corporate social responsibility (CSR) isomorphism of headquarters (HQs) and their subsidiaries as well as corporate social performance (CSP) and corporate financial performance (CFP) at the subsidiary level. Design/methodology/approach – This study tested these relationships through canonical correlation analyses. The data used were drawn from corporate HQ and 63 subsidiaries, which were publicly listed on the Istanbul Stock Exchange in 2007. Both qualitative and quantitative techniques were used in the study. Findings – The results generally indicated that the isomorphism between the CSR practices of the HQ and those of their subsidiaries could impact both the CSP, especially the product and employee dimensions, and the CFP. No relationship was found to exist between the CSP and CFP. Originality/value – Despite extensive interest by scholars and practitioners in the subject area, relatively little is known about the management of CSR by the multinational enterprises (MNEs) (Meyer, 2004), as the literature does not systematically examine the effects that occur on employee performance following the diffusion of CSR among the MNEs subsidiaries. Extending earlier literature on CSR, by integrating the effect of the CFP, the present study focuses on the effects of isomorphism between the CSR practices of the MNEs and those of their subsidiaries on both CSP and CFP. Further, the study examined the interrelation of CSP and CFP from the perspective of international management. Given the increased interest in corporate governance matters at the international level, CSR plays a central and fundamentally important role in the corporate governance of the MNEs because of both globalization forces and the pressures exerted by stakeholders. In this context, this paper is one of the first to explore the transfer of CSR practices from the MNEs to their subsidiaries. The effect of CSR on performance is an important research question, especially for emerging markets (Ibrahim and Angelidis, 1995; Waddock and Graves, 1997; Ghazali, 2007; Johnson and Greening, 1999). Despite the importance of this issue, however, until recently, only a limited discussion has been evident in the literature on CSR in the international arena with particular reference given to the emerging economies. Studying the effects of the CSR isomorphism on the performance in Turkish context is justified in three ways. First, Turkey is the largest emerging economy in Eastern Europe, the Balkans and the Middle East (Tatoglu et al., 2003, p. 7). It presents the emerging nature of the market and the transitional characteristics of the institutional environment (Cavusgil et al., 2002). Second, the drivers for CSR in Turkey, such as the other emerging markets whose institutional characteristics and economic fundamentals is similar, are exogenous and institutional rather than endogenous factors (Ararat and Gocenoglu, 2006, p. 11). Excluding the philanthropic activities, the very first manifestations of CSR were observed in the business conduct of MNEs in Turkey (Ararat and Gocenoglu, 2006, p. 11). MNEs have a dominant and leader role in Turkey for CSR practices. Finally, the subsidiaries operating in Turkey are less likely to resist the transfer of the organizational policies and practices such as human resource management policies (Sayim, 2010, 2011) and organizational culture (Ilhan, 2008). In fact, they want to even transfer the policies and practices from MNEs (Sayim 2010, 2011; Ilhan, 2008). Therefore, Turkish context provides a good case to test the effects of the CSR isomorphism on the performance.
AtıfScopus12WoS9OpenAlex16İncele - MakaleYalnız künye2015Scopus SJRQ3An evaluation of calls made to ministry of health communication center
Bostan, Sedat; Salih Güran, M.
The Objective of the Study: The objective of this study was to analyze and evaluate the complaint calls made between the years of 2004 and 2009 to the Communication Center of The Ministry of Health that was founded within the framework of "The Transformation in Healthcare Project" and thus to make a contribution by providing an introducing general view of the functionality of the feedback mechanism. The Method: The sample of the study consists of 686.397 appeal calls that were made to the Ministry of Health's Communication Center between the years 2004 and 2009. The complaints have been studied in relation to a range of factors like the months of the complaints, the hour of the day, the days of the week, the age groups of the complainers, gender, and type of the complaint and the reason of complaint. Findings: By answering not only to health related appeals, but also to virtually any issue of interest for the citizens, SABIM achieved a plural involvement of the stakeholders and an "interactive administration". It realized feedback mechanisms that enabled the real-time assessment of services as they were being supplied, thus eliminating many problems that arise from lack of communication.
- MakaleAçık Erişim2015Scopus SJRQ2Distribution of β-Lactamase Genes Among Carbapenem-Resistant Klebsiella pneumoniae Strains Isolated From Patients in Turkey
Iraz, Meryem; Düzgün, Azer Ozad; Sandalli, Cemal; Doymaz, Mehmet Ziya; Akkoyunlu, Yasemin; Saral, Aysegul; Peleg, Anton Y.; Özgümüs, Osman Birol; Beris, Fatih Saban; Karaoglu, Hakan
Background: The emergence of carbapenem-resistant Klebsiella pneumoniae poses a serious problem to antibiotic management. We investigated the beta-lactamases in a group of carbapenem-resistant K. pneumoniae clinical isolates from Turkey. Methods: Thirty-seven strains of K. pneumoniae isolated from various clinical specimens were analyzed by antimicrobial susceptibility testing, PCR for the detection of p-lactamase genes, DNA sequencing, and repetitive extragenic palindronic (REP)- FOR analysis. Results: All 37 isolates were resistant to ampicillin, ampicillin/sulbactam, piperacillin, piperacillin/tazobactam, ceftazidime, cefoperazone/sulbactam, cefepime, imipenem, and meropenem. The lowest resistance rates were observed for colistin (2.7%), tigecycline (11%), and amikacin (19%). According to FOR and sequencing results, 98% (36/37) of strains carried at least one carbapenemase gene, with 32 (86%) carrying OXA-48 and 7 (19%) carrying NDM-1. No other carbapenemase genes were identified. All strains carried a CTX-M-2-like beta-lactamase, and some carried SHV- (97%), TEM- (9%), and CTX-M-1-like (62%) beta-lactamases. Sequence analysis of bla(TEM) genes identified a bla(TEM-166) with an amino acid change at position 53 (Arg53Gly) from bla(TEM-1b), the first report of a mutation in this region. REP-FOR analysis revealed that there were seven different clonal groups, and temporo-spatial links were identified within these groups. Conclusions: Combinations of beta-lactamases were found in all strains, with the most common being OXA-48, SHV, TEM, and CTX-M-type (76% of strains). We have reported, for the first time, a high prevalence of the NDM-1 (19%) carbapenemase in carbapenem-resistant K. pneumoniae from Turkey. These enzymes often co-exist with other beta-lactamases, such as TEM, SHV, and CTX-M beta-lactamases.
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İncele - MakaleAçık Erişim2015Scopus SJRQ1Antioxidant components of Viburnum opulus L. determined by on-line HPLC-UV-ABTS radical scavenging and LC-UV-ESI-MS methods
Karaçelik, Ayca Aktas; Küçük, Murat; Iskefiyeli, Zeynep; Aydemir, Sezgin; De Smet, Seppe; Miserez, Bram; Sandra, Patrick
Antioxidant activity of the juice and seed and skin extracts prepared with methanol, acetonitrile, and water of Viburnum opulus L. grown in Eastern Black Sea Region were studied with an on-line HPLC-ABTS method and off-line antioxidant methods, among which a linear positive correlation was observed. The fruit extracts were analysed with the HPLC-UV method optimised with 14 standard phenolics. Identification of the phenolic components in the juice was made using an HPLC-UV-ESI-MS method. Nineteen phenolic compounds in juice were identified by comparing the retention times and mass spectra with those of the standards and the phenolics reported in the literature. The major peaks in the juice belonged to coumaroyl-quinic acid, chlorogenic acid, procyanidin B2, and procyanidin trimer. Quite different antioxidant composition profiles were obtained from the extracts with the solvents of different polarities. The antioxidant activities of the seed extracts were higher than those of the skin extracts in general. (C) 2014 Elsevier Ltd. All rights reserved.
AtıfScopus117WoS101OpenAlex129İncele - MakaleYalnız künye2015Scopus SJRQ3The relationship between ischemia-modified albumin and myocardial infarction in on-pump coronary artery bypass grafting
Mentese, Umit; Dogan, Orhan Veli; Dogan, Suheyla; Turan, Ibrahim; Usta, Sefer; Demirbas, Mine; Aykan, Ahmet Cagri; Kiliç, Askin; Demir, Selim; Karahan, Suleyman Caner
Background: This study aims to evaluate the potential of ischemia-modified albumin (IMA) to predict the myocardial infarction in on pump coronary artery bypass grafting (ONCABG) patients. Methods: Fifty elective isolated ONCABG patients (41 males, 9 females; mean age 66 years; range 56 to 75 years) were included in the study. Patients were divided into perioperative myocardial infarction (PMI; n=8) and non-infarction (NPMI; n=42) groups according to perioperative cardiac troponin I (cTnI) values and ECG findings. Serum IMA levels were measured preoperatively, 20 minutes after aortic cross clamping, 30 minutes, at 3, 6, 12 and 24 hours after declamping. Results: Compared to the NPMI group, the declamping 30 minutes, 3, 6 and 12 hours IMA levels were higher in the PMI group (p=0.002, p=0.048, p=0.023, p=0.007, respectively). In both NPMI and PMI groups, the 20 minutes after aortic cross clamping IMA levels were higher compared to the preoperative IMA levels (p=0.0001, p=0.038, respectively). Conclusion: Our study results show that IMA may be an early marker of myocardial infarction in the ONCABG patients.
AtıfScopus2WoS2OpenAlex1İncele - MakaleYalnız künye2014Yaşamın kendisinden varlığın gerçekliğine
Kahraman, Yakup
Felsefe tarihinde özellikle antikçağ yunan felsefesi sonrası ile 19. yy. arasında varlığın ele alınış tarzının genel olarak soyut kabullenmelerin ötesine geçemediğini, kavramsal çerçevelerin içerisine sıkıştığını söyleyebiliriz. Bu makalede varlığı anlama çabasında bu kurgusal yapının ötesine nasıl çıkılabileceği, pozitivist teorinin ortaya koyduğu metafizik karşıtı söylemin gerçekte sağlam bir ontolojik yapı sağlayıp sağlamadığı sorgulanmıştır. Bu yaklaşımın doğa bilimsel yöntemi varlığı anlamak için kullanma çabasının ortaya çıkardığı zeminin de ontolojik yapı için yetersiz olduğu gösterilmiş bu refleksin metafizik, kurgusal yaklaşımları eleştirirken kendisinin de bu duruma düştüğü ortaya konularak, yaşam merkezli varlık yorumlamalarının ontoloji için geçerli olacağı savunulmuştur. Varlık ve yaşamın birbiri ile olan ilişkisinin her ikisini serimleme imkânını ortaya çıkardığı gösterilmeye çalışılmıştır.
- MakaleYalnız künye2014The customer loyalty and satisfaction with store image dimensions in word of mouth communication: In province of Ordu
Yildiz, Salih; Tehci, Ali
The aim of the study is to investigate the effects of store image dimensions to customer loyalty and satisfaction and also the effects of customer loyalty and satisfaction to word of mouth communication. Besides the other objective is to determine whether there is significant difference of demographic characteristics of consumers on the word of mouth communication or not. In the study the data was obtained from 507 person with face to face survey who are customers of a store in Ordu and the research data was tested with using Cronbach alpha coefficient method, factor analysis, one way analysis of variance, independent sample t-test, multiple regression analysis. As a result, staff factor did not effect the customer satisfaction and customer loyalty, suitability factor did not effect the customer loyalty and also according to results, the age and educational status which belong to demographic features of customer did not cause a significant difference in word mouth communication.
AtıfTR Dizin16İncele - MakaleYalnız künye2014Cinsiyet farklılığının şirket finansman yapısı ve finansal performansı üzerindeki etkisi: teorik bir inceleme
Durmuş, Savaş; Ayaydin, Hasan
Son yıllarda kadınların işletme yönetimindeki rolleri ile ilgili çalışmalar ve tartışmaların sayısının arttığı görülmektedir. Bu çalışmalar kadın ve erkekler tarafından yönetilen şirketlerin başlangıç sermayesi, finansman yapısı ve finansal performans kanalıyla performans üzerine odaklanmaktadırlar. Hem sanayi hem de hizmet sektörü üzerine yapılan araştırmalar kadınlar tarafından yönetilen şirketlerin erkekler tarafından yönetilen şirketlerden daha az başlangıç sermayesi ve daha az dışsal finansman kaynağı ile yönetildiğini göstermektedir. Bu durum kadınlar tarafından yönetilen şirketlerin finansal performansının düşmesine yol açmaktadır. Feminist teoriler bu konunun analiz edilmesinde başlangıç noktasıdır. Bu çalışmanın amacı cinsiyet farklılığının kadın ve erkekler tarafından yönetilen şirketlerin finansman yapısı ve finansal performansı üzerindeki etkilerini inceleyen çalışmaları feminist teoriler bağlamında değerlendirmektir. Bu bağlamda çalışmada öncelikle kadın istihdamı açısından turizm sektörü incelenmiştir. Daha sonra liberal ve sosyal feminizm teorileri irdelenerek, cinsiyet farklılığının şirket finansal performansına olan etkisi açıklanmıştır. Sonuç bölümünde ise özellikle turizm sektöründe cinsiyet farklılığının, farklı karakteristik özelliklere ve yeteneklere sahip, işletmeye yarar sağlayacak erkek ve kadın çalışanlardan faydalanmanın bir yolu olarak görülebileceği önerisinde bulunulmuştur.
- MakaleYalnız künye2014Determination of different factors affecting the facility location decisions of entrepreneurs: A field study
Küçük, Orhan
During the course of development of a country, enhancement of entrepreneurship is essential for its contribution to improvement of entrepreneurial characteristics and quality, implementation of new ideas, technological advancement and emerging of new inventions. Aim of this study is to present how and to what extend the factors such as economic, education, health, environment and social factors relation with decision of investor on location of facility, beyond the main location factors such as transportation, and market distance. In this research, a data collecting tool has been developed through assessing literature and the previous studies, a survey has been made on an assigned group of people and the obtained data has been analyzed in SPSS 20.0 computer program, then the results have been shared.
AtıfTR Dizin1İncele - MakaleYalnız künye2014Uluslararası çeşitlendirme, finansal bulaşma ve Küresel finansal kriz ilişkisi üzerine bir çalışma
Ayaydin, Hasan
Çalışmanın amacı küresel finansal kriz öncesi, süreci ve sonrasında gelişmiş ve gelişen hisse senedi piyasaları arasındaki getiri ilişkilerini ortaya koymak, uluslararası çeşitlendirme yararının geçerli olup olmadığını ve finansal bulaşma etkisinin var olup olmadığını incelemektir. Bu amaçla çalışma 31 Ocak 1990-21 Eylül 2012 döneminde 24 gelişmiş ve 21 gelişen piyasa için gerçekleştirilmiştir. Ulaşılan sonuçlar finansal kriz öncesi dönemde nispeten düşük olan hisse senedi getirileri arasındaki ilişkilerin finansal kriz süresinde yükseldiğini, finansal kriz sonrası süreçte ise düştüğünü, ancak finansal kriz öncesi döneme göre hala yüksek olduğunu göstermektedir. Bulgular finansal kriz döneminde oldukça azalan uluslararası çeşitlendirmenin yararlarının finansal kriz sonrası dönemde az da olsa arttığı, ancak finansal kriz öncesi döneme göre hala çok düşük olduğunu göstermektedir. Elde edilen bulgular finansal kriz sürecinde hem gelişmiş hem de gelişen piyasalar arasında finansal bulaşma etkisinin varlığını gösterir niteliktedir.
AtıfTR Dizin5İncele - MakaleYalnız künye2014Determining the barriers in development of University-industry cooperation with anp method: An example of Karadeniz Technical University
Baki, Birdoğan; Ar, Ilker Murat; Peker, İskender
The main purpose of this study is to determine the importance degree of the barriers in the University-Industry Cooperation (UIC) by Karadeniz Technical University&#8217;s faculty members. As a result of the Analytic Network Process (ANP) was performed for this purpose, &#8220;Structural Problems&#8221;, &#8220;Problems Caused by Industry&#8221;, &#8220;Problems Caused by Faculty Members&#8221; and &#8220;Problems Caused by University&#8221; were determined as the main obstacles of UIC. Furthermore, &#8220;Undeveloped Cooperation Culture&#8221; was determined as the most important sub-criteria when it was examined in more detail. &#8220;Lack of Interest from Industrialists&#8221; and &#8220;Bureaucratic Barriers&#8221; are came after from this sub-criteria.
AtıfTR Dizin2İncele - MakaleYalnız künye2014Bir geçiş dönemine ait basılı reklamların bilgi içeriği
Özsoy, Tufan
Through an examination of print ads about informative content, this paper goes some way to see the impact of changes in the economic and cultural environment on ads. Although much has been written about informative content of ads, no known longitudinal study has examined the information content of Turkish print ads in historical manner. The purpose of this paper is to shed light on the historical development of Turkish print ads according to informational content. A content analysis of 303 Turkish newspaper advertisements was conducted. It was found that Turkish newspaper advertisements generally contain a large amount of information relative to similar content studies. But also there is a significant decrease on the number of multiple cues from late Ottoman to 1960s.
- MakaleYalnız künye2014The effects of ınformatıon and communıcatıon technologıes on economıc growth: The case of transıtıon economıes
Hayaloğlu, Pınar; Artan, Seyfettin; Baltaci, Nuri
As a result of the transition to an information society, advances in information and communication technologies have become an important determinant of growth in recent years. This new economic structure reflected in countries development and growth strategies, the opportunities provided by information and communication technologies has become a key element in achieving competitiveness. The aim of this study is to research the relationship between information and communication technologies and economic growth for transition economies. In this study, covering the period 1994- 2011 static panel data analysis technique was used. According to the results, development of information and communication technologies has a positive effect on economic growth in the sample of transition economies.
AtıfTR Dizin9İncele - MakaleYalnız künye2014Scopus SJRQ3Tereyağı stabilitesi üzerine çörekotu (Nigella sativa L.) uçucu yağı kullanılabilirliğinin araştırılması
Erdogan, Ummugulsum; Dağdemir, Elif; Cakmakci, Songul; Gündoğdu, Engin
The aim of this study was to investigate the effect of black cumin (Nigella sativa L.) essential oil on butter stability. For this aim, 0.05, 0.1 and 0.2 wt-% essential oil was added to the butter. Antioxidant activity of the essential oil was compared to that of synthetic antioxidant BHT (100 ppm). All samples were stored at 4±1oC for 90 days. Thiobarbituric acid and peroxide values of all samples containing essential oil were decreased depending on concentrations. The amount of 0.2% of essential oil had showed strong antioxidant activity, which was almost equal to that of BHT. The addition of essential oil reduced total aerobic mesophilic bacteria, lactic acid bacteria and coliform bacteria count during storage period but did not show remarkable antifungal activity. Samples containing essential oil were preferred by the panellists compared to Control sample. Present results indicate that black cumin essential oil may be considered as a new source of natural antioxidant.
AtıfTR Dizin8İncele