Antioxidant Activities of Rosemary, Sage, and Sumac Extracts and Their Combinations on Stability of Natural Peanut Oil

Musa ?zcan 한국식품영양과학회 2003 Journal of medicinal food Vol.6 No.3

The antioxidant efficacy of rosemary (Rosmarinus officinalisL.), sage (Salvia fruticosaL.), and sumac (RhuscoriariaL.) extracts and combinations at 4% concentrations (wt/vol, extract/oil) were investigated. Methanolic extracts ofrosemary, sage, sumac, and their combinations were applied to peanut oil stored at 80° C for 24 h. The antioxidant effect wasdetermined by measuring the peroxide value. All extracts showed antioxidant effects compared with control. But the antiox-idant effect of all extracts was low compared with that of butylated hydroxytoluene. Rosemary extract (except for 3 and 4 h)exhibited the most antioxidant effect compared with other individual extracts. Of blends, the most effective ones were sageplus sumac combinations. Sumac extract is also promising as a source of natural antioxidants.

T?RK?YE'DE E??T?M ALANINDA TOPLAM KAL?TE Y?NET?M? UYGULAMALARINA GENEL B?R BAKI?

?zcan YILMAZ 한국외국어대학교(글로벌캠퍼스) 중동연구소 2006 중동연구 Vol.24 No.2

<Abstract> General View to the Total Quality Management Applications of the Turkish Educational System Özcan YILMAZ Ankara University, urkey Total quality management is, the strong leadership, and the constructive organization, and with a team effort, as a result, the least faulty product can be produced, with the highest customer satisfaction. In the first volume of this study, we tried to explain the evolution of the management from the classic way, to the Total Quality Management with changes to the human’s social life, and the effects of the industrialization. In the second volume, The Total Quality Management is described, and we explained that why do we need and what are principles of the Total Quality Management, are explained. In the third and the last volume, we talked about the difficulties of the application of the Total Quality Management systems onto the Turkish educational programs, and systems, and we tried to introduce some possible solutions to those problems. We have emphasized that, people who are benefited from those educational institutions which implemented the principles of the total quality management programs, become the leaders of their countries, and they help to advance their nations, into the more developed group of countries. Key Word: Total quality management, Customer satisfaction, Strong leadership, Educational programs, Evolution of the management

Mineral Composition of Different Parts of Capparis ovata Desf. var. canescens (Coss.) Heywood Growing Wild in Turkey

Musa Özcan 한국식품영양과학회 2005 Journal of medicinal food Vol.8 No.3

Major and minor mineral contents of young shoots, flower buds, caperberries (fruit), and seeds of CapparisovataDesf. var. canescens(Coss.) Heywood, used as a pickling product in Turkey, were determined by inductively coupledplasma atomic emission spectrometry. Twenty-one minerals were assayed in samples. All materials contained high amountsof Ca, K, Mg, Na, P, Pb, and Zn. The highest levels of Ca (598.3416,947.1 ppm), K (3,093.128,163.9 ppm), Na (57.9444.3ppm), P (1,690.54,153.9 ppm), and Zn (21.135.6 ppm) were found in flower buds. The content of K was high in most casesand ranged from 28,163.9 ppm (flower bud) to 3,093.1 ppm (caper seed). Ba, Cd, Cr, Cu, Li, Ni, Pb, and Se contents of ca-per plant organs were found to be very low. Consequently, caper parts were rich in minerals, and they may be valuable forfood uses. The results may also be useful for the evaluation of nutritional information.

Effect of Different Locations on the Chemical Composition of Essential Oils of Laurel (Laurus nobilis L.) Leaves Growing Wild in Turkey

Musa Özcan,Jean-Claude Chalchat 한국식품영양과학회 2005 Journal of medicinal food Vol.8 No.3

The essential oil components of Laurus nobilisgathered from seven different locations of Turkey were iden-tified by gas chromatography/mass spectrometry. The oil yields on a dry weight basis ranged between 1.4% to 2.6%. The ma-jor component was 1,8-cineole (51.7368.48%); other predominant components were .-terpinyl acetate (4.049.87%), sabinene(4.447.75%), .-pinene (2.934.89%), .-pinene (2.583.91%), terpinene-4-ol (1.333.24%), and .-terpineol (0.953.05%).Minor qualitative and major quantitative variations of some compounds were determined with respect to localities of collec-tion. As a result, the 1,8-cineole content of these oils was significantly higher than those of other constituents of L. nobilis.Laurel is usually considered as the natural source of this compound, used in the flavor and fragrance industry.

Vulvar Myiasis

S?leymanYazar,Haluk?zcan,??kranDin?er,?zzet?ahin 연세대학교의과대학 2002 Yonsei medical journal Vol.43 No.4

A CRITIQUE OF BUSINESS DEVELOPMENT ASSISTANCE IN THE KYRGYZ REPUBLIC

Gü,l Berna Ö,zcan 국제개발협력학회 2016 국제개발협력연구 Vol.8 No.3

With empirical evidence gathered from four different donor programmes launched in the Kyrgyz Republic, this study offers a critical analysis of western aid interventions. The findings point out that local effects of extensive aid exposure have weakened reforms and captured agency interests. Aggressive market liberalisation and decentralisation policies ignored long-term state and industrial capacity building. 키르기스공화국에서 실시되는 4개의 원조 프로그램에 대한 경험적 근거를 토대로, 다음 연구는 서구 원조 개입에 대해 비판적으로 분석한다. 연구 결과, 광범위한 원조 노출의 지역적 효과는 개혁을 약화시키고 원조기관의 이익을 위하는 것으로 나타났다. 공격적인 시장자유화와 지방분권정책이 국가 및 산업의 장기적인 역량 구축을 무시하는 것이다.

Retinal Nerve Fiber Layer Thickness and Its Relationship With Executive Functions in Adult Attention Deficit Hyperactivity Disorder Patients

Derya Kaymak,I˙brahim Gü,ndog˘mus¸,Mihriban Dalkıran,Murat Kü,ç,ü,kevciliog˘ lu,Ö,zcan Uzun 대한신경정신의학회 2021 PSYCHIATRY INVESTIGATION Vol.18 No.12

Objective The aim of this study was to compare the thickness of the retinal nerve fiber layer (RNFL) with controls in individuals with attention deficit hyperactivity disorder (ADHD) and to examine the relationship between RNFL thickness and the level of performance in disease severity and executive function tests in ADHD cases.Methods The study included 38 volunteer patients diagnosed with ADHD and 30 healthy volunteers. Adult ADHD self-report scale was used for ADHD symptom severity. Executive functions were evaluated by Digit Span Test, Verbal Fluency Test, Stroop Test, and Trail Making Test. RNFL thickness of all participants was evaluated using optical coherence tomography (OCT).Results In the comparison of RNFL values, it was found that right mean, right temporal, right temporal inferior, left mean, left nasal, and left nasal inferior quadrant values were statistically thinner in ADHD cases compared to the control group (p<0.05). There was no statistically significant correlation between the mean RNFL thickness values of the right and left eyes of ADHD cases and the symptom severity and performance levels in executive function tests.Conclusion This study is a guide in terms of being the first study investigating the relationship between RNFL thickness, symptom severity, and various neuropsychological tests in adults with ADHD.

Does Psychodrama Affect Perceived Stress, Anxiety-Depression Scores and Saliva Cortisol in Patients with Depression?

Lale Gö,nenir Erbay,İ,smail Reyhani,Sü,heyla Ü,nal,Cemal Ö,zcan,Tuba Ö,zgö,ç,er,Cihat Uç,ar,Sedat Yıldız 대한신경정신의학회 2018 PSYCHIATRY INVESTIGATION Vol.15 No.10

Objective: Little is known about the effects of psychodrama group therapy on the level of stress, anxiety and depression of the group members, and the biological markers of stress. The aim of this study test cortisol level as a biological reflection of some mental characteristics gained by the psychodrama method in coping with stress. Methods: Depressive patients aged between 18 and 65 years, who diagnosed with depression according to DSM-5, without psychiatric comorbidity, who do not use drugs and were available for psychodrama were enrolled into the study. These patients were evaluated using the Perceived Stress Scale, State-Trait Anxiety Inventory and Beck Depression Inventory. In order to observe the circadian rhythm of cortisol, samples were collected from the participants before lunch, before dinner and before going to sleep on the day before psychodrama and on the 0, 15th, and 30th minutes after awakening in the morning of the psychodrama day; as well as just before and after the psychodrama session. Saliva cortisol level just before the initial session of psychodrama group therapy was compared with the saliva cortisol level just after the last psychodrama session at the end of 16 weeks. Results: Statistically significant difference was determined between the scores of perceived stress scale, STAI-1, STAI-2, beck depression inventory and salivary cortisol level before and after psychodrama session. There was significant decrease in both the scale scores and salivary cortisol after vs. before psychodrama. Conclusion: This results is important as it shows the biological aspect of clinical improvement. Further studies would provide us with better understanding of the effects of psychodrama group psychotherapy on depressive mood and biological projections by means of short-term and long-term follow-up studies.

The Relationship between the Number of Manic Episodes and Oxidative Stress Indicators in Bipolar Disorder

Sü,leyman Akarsu,Abdullah Bolu,Emre Aydemir,Selma Bozkurt Zincir,Yasemin Gü,lcan Kurt,Serkan Zincir,Murat Erdem,Ö,zcan Uzun 대한신경정신의학회 2018 PSYCHIATRY INVESTIGATION Vol.15 No.5

Objective Bipolar disorder (BD) is a chronic mood disorder characterized by recurrent episodes that has a lifetime prevalence of 0.4– 5.5%. The neurochemical mechanism of BD is not fully understood. Oxidative stress in neurons causes lipid peroxidation in proteins associated with neuronal membranes and intracellular enzymes and it may lead to dysfunction in neurotransmitter reuptake and enzyme activities. These pathological processes are thought to occur in brain regions associated with affective functions and emotions in BD. The relationship between the number of manic episodes and total oxidant-antioxidant capacity was investigated in this study. Methods Eighty-two BD patients hospitalized due to manic symptoms and with no episodes of depression were enrolled in the study. Thirty of the 82 patients had had their first episode of mania, and the other 52 patients had had two or more manic episodes. The control group included 45 socio-demographically matched healthy individuals. Serum total antioxidant capacity (TAC) and total oxidant capacity (TOC) measurements of the participants were performed. The oxidative stress index (OSI) was calculated by TOC/TAC. Results There were no significant differences in OSI scores between BD patients with first-episode mania and BD patients with more than one manic episode. However, OSI scores in both groups were significantly higher than in the control group. TOC levels of BD patients with first-episode mania were found to be significantly higher than TOC levels of BD patients with more than one manic episode and healthy controls. There were no significant differences in TAC levels between BD patients with first-episode mania and BD patients with more than one manic episode. TAC levels in both groups were significantly higher than in the control group. Conclusion Significant changes in oxidative stress indicators were observed in this study, confirming previous studies. Increased levels of oxidants were shown with increased disease severity rather than with the number of manic episodes. Systematic studies, including of each period of the disorder, are needed for using the findings indicating deterioration of oxidative parameters.

Stronger Together in Lab: Multi-Center and Laboratory Spine Studies are Closer to Publication than Single-Center and Clinical Spine Studies: Snapshot of Annual Meetings of the Spine Society of Europe

Özcan-Ekşi Emel Ece,Canbolat Çağrı,Ayhan Selim,Ekşi Murat Şakir 대한척추외과학회 2020 Asian Spine Journal Vol.14 No.5

Study Design: This is a cross-sectional study of literature databases.Purpose: The purpose of this study is to analyze the predictive factors for the publication rates of spine studies.Overview of Literature: Spine research has garnered worldwide interest due to the increased number of spinal disorders in aging population.Methods: We evaluated the abstracts presented at the annual meetings of the Spine Society of Europe between 2009 and 2012. Additionally, we recorded presentation categories, study designs, research types, random assignments of the subjects, single- or multi-center- based methodologies, and significance of the results.Results: We evaluated 965 abstracts, 53.5% of which were published in peer-reviewed journals. Publication rates were significantly higher for oral presentations (62.9%) and prospective studies (61.3%) as compared to the poster presentations (46.7%) and retrospective studies (44.2%), respectively (p <0.001). Clinical studies contributed to about 86.1% of the published abstracts. However, publication rates were significantly higher for laboratory studies as compared to clinical studies (70.1% vs. 50.8%, p <0.001). Multi-center studies were closer to publication than single-center studies (67.1% vs. 52.2%, p =0.009). Our study demonstrated that multi-center studies (odds ratio, 1.81; p =0.016) and laboratory studies (odds ratio, 2.60; p <0.001) are more likely to be published.Conclusions: Multi-center collaborations dedicated to experimental studies in spine research are highly ranked and more likely to be published in peer-reviewed journals.