Suncokretove stabljike (Helianthus annuus) kao alternativna sirovina za cementom vezane ploče iverice

Sunflower stalks (Helianthus annuus) were studied as an alternative raw material for cement bonded particleboard. Experimental cement bonded particleboards measuring 500 mm × 500 mm × 12 mm with nominal density of 1300 kg/m3 were produced using different ratios of sunflower stalk particles with wood. Properties of the cement bonded particleboards evaluated include water absorption, thickness swelling, screw withdrawal strength and bending properties. Results of the study showed that the addition of small amount of sunflower stalks in the production of cement bonded particleboard does not significantly influence the properties tested. Inclusion of more stalks in the mixture significantly decreases mechanical properties and raises thickness swelling and water absorption values of the cement bonded particleboard. Results indicate that boards which include a small amount of sunflower stalks provide properties required by the standards for general purpose-use cement bonded particleboards.U radu se opisuje istraživanje stabljike suncokreta (Helianthus annuus) kao alternativne sirovine za proizvodnju cementom vezanih ploča iverica. Eksperimentalne cementom vezane ploče iverice dimenzija 500 mm × 500 mm × 12 mm i gustoće 1300 kg/m3 izrađene su s različitim omjerima iverja od suncokretovih stabljika i drva. Pritom su istraživana ova svojstva tih ploča iverica: sposobnost upijanja vode, debljinsko bubrenje, izvlačna sila vijaka i savijanje. Rezultati istraživanja pokazali su da mali dodatak suncokretovih stabljika u proizvodnji cementom vezanih ploča iverica ne utječe znatnije na ispitivana svojstva. Dodavanjem veće količine stabljika u smjesu bitno slabe mehanička svojstva te se povećava debljinsko bubrenje i upojnost cementom vezanih ploča iverica. Rezultati pokazuju da ploče s malom količinom suncokretovih stabljika zadovoljavaju propisane zahtjeve za opću uporabu cementom vezanih ploča iverica

Okul yöneticilerinin liderlik stilleri ile beden eğitimi öğretmenlerinin örgütsel bağlılıkları arasındaki ilişki

The purpose of this study is to identify the relationship between school administrators’ leadership style and physical education teachers’ organizational commitment. The population of the study comprised 291 physical education teachers working in Sakarya and Bartın cities in 2009-2010 education year. In order to identify school administrators transformational and procedural leadership styles, Multifactor Leadership Questionnaire 5-x short (MLQ) was used. Organizational Commitment Scale which was developed by Balay was used to measure the organizational commitment levels of physical education teachers (Balay, 2000a & Balay, 2000b). In order to analyze the data collected for the study, several statistical techniques such as descriptive statistical analyses, variance analysis, correlation analysis and multiple regression analysis were used. As a result of the study, according to physical education teachers’ perceptions, school administrators “usually” demonstrate transformational leadership behaviors and “sometimes” demonstrate procedural leadership behaviors. Physical education teachers show lower organizational commitment in the compliance sub-dimension, moderate organizational commitment in the identification sub-dimension and higher organizational commitment in the internalization sub-dimension. When sub-dimensions of physical education teachers’ organizational commitment and sub-dimensions of schools administrators’ leadership styles are examined, transformational leadership has 1-a negative moderate significant relationship with adaptation, 2-a positive moderate significant relationship with identification and 3-a positive high significant relationship with internalization. School administrators’ procedural leadership sub-dimension has a positive high significant relationship with only internalization sub-dimension of physical education teachers’ organizational commitment.Bu araştırmanın amacı, okul yöneticilerinin liderlik stilleri ile Beden Eğitimi öğretmenlerinin örgütsel bağlılıkları arasındaki ilişkinin belirlenmesidir. Araştırma evrenini Sakarya ve Bartın İllerinde 2009-2010 eğitim-öğretim yılında görev yapan 291 beden eğitimi öğretmeni oluşturmaktadır. Araştırma verilerinin toplanmasında okul yöneticilerinin dönüşümcü ve işlemci liderlik stillerini belirlemek için Multifactor Leadership Questionnaire 5-x short (MLQ) anketi kullanıldı. Beden Eğitimi öğretmenlerinin örgütsel bağlılığı ölçmek için Balay’ın geliştirdiği Örgütsel Bağlılık Ölçeği kullanılmıştır (Balay,2000a, Balay,2000b). Tanıtıcı İstatistikî Analizler, Varyans Analizi, Korelasyon analizi ve Çoklu Regresyon Analizi tekniklerinden yararlanılmıştır. Araştırma sonucunda beden eğitimi öğretmenlerinin algılarına göre, okul yöneticileri dönüşümcü liderlik davranışlarını “genellikle” sergiledikleri ve işlemci liderlik davranışlarını  “ara sıra” sergiledikleri görülmüştür. Beden eğitimi öğretmenlerinin örgütsel bağlılıklarına ait bulgularda; uyum alt boyutunda düşük düzeyde, özdeşleşme alt boyutunda orta düzeyde ve içselleştirme alt boyutunda ise yüksek düzeyde bağlılık yaşadıkları görülmektedir. Beden eğitimi öğretmenlerine ilişkin örgütsel bağlılık alt boyutları ile okul yöneticilerinin liderlik stilleri alt boyutları arasında; 1-dönüşümcü liderlik ile uyum arasında negatif yönlü orta düzeyde, 2- özdeşleşme ile pozitif yönde orta düzeyde, 3-içselleştirme alt boyutu ile yüksek düzeyde pozitif yönde anlamlı bir ilişki olduğu ortaya çıkmıştır. Okul yöneticilerinin işlemci liderlik alt boyutuyla beden eğitimi öğretmenlerinin örgütsel bağlılıkları arasında sadece içselleştirme alt boyutu arasında yüksek düzeyde ve pozitif yönde anlamlı bir ilişki ortaya çıkmıştır

Early assessment of percutaneous coronary interventions for chronic total occlusions analyzed by novel echocardiographic techniques

OBJECTIVE: Successful revascularization of chronic total occlusions has been associated with improved left ventricular systolic function, reduced anginal symptoms, increased exercise capacity, and increased survival. This study was conducted to determine the impact of revascularization in chronic total occlusion on left ventricular function using novel echocardiographic techniques. METHODS: A total of 129 patients with chronic total occlusion who underwent revascularization between April 2011 and November 2012 were included in this study. Echocardiographic assessments with two-dimensional speckle tracking echocardiography and real-time three-dimensional echocardiography were performed before the procedure and one month after the procedure. The left ventricular ejection fraction, left ventricular volumes, and three-dimensional systolic dyssynchrony index were quantified. RESULTS: An immediate procedural success was obtained in 118 patients (91.5%). There were no acute or subacute stent thromboses during follow-up. The mean left ventricular ejection fraction significantly increased (

The composition of essential oil of Veronica persica Poir. from Istanbul

Previously, phenylethanoid and iridoid glycosides were reported from Veronica persica Poir. (Plantaginaceae) [1]. However, to the best of our knowledge, there are no reports on its essential oil or volatiles’ composition. The aim of the current study was to determine the essential-oil composition of Veronica persica to provide information on the chemistry of volatiles of this species. The plant material used in this study was collected from Kanuni Sultan Süleyman City Forest in Istanbul in January 2015. The essential oil of air-dried aerial parts of V. persica was obtained by hydrodistillation (3 h) using a Clevenger-type apparatus. The essential-oil yield obtained from the distillation of 16.5 g of plant material was below 0.01 mL. The essential oil was trapped in n-hexane (1 mL) and dried over anhydrous Na2SO4. The essential oil was analyzed without further dilution by GC-MS. The essential oil was analyzed with an Agilent 5977 MSD GC-MS system operating in EI mode; injector and MS transfer line temperatures were set at 250 °C. Splitless injection was used in the analysis. Innowax FSC column (60 m x 0.25 mm, 0.25 µm film thickness) and helium as the carrier gas (1 mL/min) were used in GC-MS analyses. The oven temperature program was: 60 °C for 10 min and then raised to 220 °C at a rate of 4 °C/min, afterward the temperature was kept constant at 220 °C for 10 min and then raised to 240 °C at a rate of 1 °C/min. Mass spectra were recorded at 70 eV with the mass range m/z 35-425. Relative amounts of the separated compounds were calculated from the integration of the peaks in MS chromatograms. Identification of essential-oil components was carried out by comparison of their retention indices (RI), relative to a series of n-alkanes (C5 to C30), with the literature values, as well as by mass spectral comparison. Veronica persica oil was mainly composed of the diterpene trans-phytol and n-alkanes. Seventeen compounds were identified representing 92.1% of the detected oil constituents. The main components of the oil were trans-phytol (24.4%), nonacosane (15.9%), heptacosane (13.1%), and hentriacontane (7.2%). The essential oil did not contain any monoterpenes but contained sesquiterpenes in only minor amounts. We believe the existence of the diterpene trans-phytol in high quantity points to the possibility that other monoterpenes and sesquiterpenes might also be present in the plant, but that they might be observed through headspace or SPME sampling

Coronary artery fistula: Review of 54 cases from single center experience

Background: Demographic and clinical characteristics and angiographic findings of Turkish patients with coronary artery fistula have been investigated in this study and diagnostic tests and treatment methods used in these patients have also been evaluated in detail. Methods: We have examined the cardiac catheterization laboratory database retrospectively between March 2006 and July 2010. Among 49,567 patients, we have noted 60 patients diagnosed as coronary artery fistula. After coronary angiographic images were evaluated by two invasive cardiologists, 54 patients who had clear evidence of vessel of origin and drainage were included in the study. Results: A total of 54 (0.1%) patients with coronary artery fistula were noted. Mean age was 56.7 ± 10.7 years; 42 out of 54 patients had accompanying cardiac disorders. Patients’ complaints were directly associated with the presence of the fistula. Chest pain was the admission symptom in all of the patients with isolated coronary artery fistula. Six patients had coexistent congenital anomalies. Myocardial infarction with ST segment elevation occurred in 11 of the patients. In contrast to the previous reports, the most common artery of origin of the fistula was left anterior descending artery (50.8%) and pulmonary artery was found to be the most frequent region of the fistula drainage by 53.7%. Conclusions: Our findings suggest that large fistulas originating from the proximal segments of coronary arteries may increase the likelihood of atherosclerosis and myocardial infarction even in asymptomatic patients with no evidence of ischemia in noninvasive tests and no dilatation of cardiac chambers, and should therefore be closed

Türkiye'de farklı niteliklere sahip süt sığırı işletmelerinde mastitisin koruma ve kontrolü kapsamındaki bazı uygulamaların düzeyleri

Amaç: Sunulan çalışmada Türkiye’deki 177 küçük ve 169 büyük ölçeklisüt sığırı işletmesinde mastitisin koruma ve kontrolu?ne yönelik uygulamalar ve uygulanma düzeylerinin ortaya koyulması amaçlandı.Gereç ve Yöntem: Bu kapsamda Türkiye’de farklı illerdeki toplam 346süt sığırı işletmesinden meme sağlığı ile ilgili verileri toplanarak istatistiksel açıdan incelendi.Bulgular: Büyük ölçekli işletmelerde en fazla 50-200 baş (n=96, %56,8ve en fazla Holştayn ırkı (n=97, %57,4)) ve küçük ölçekli işletmelerde iseen fazla 11-20 baş (n=71, %40,1 ve en fazla Simental ırkı (n=153, %86,4))arası inek olduğu, bu iki tip işletmede 4 yaşlı ineklerin daha fazla olduğu(sırasıyla, n=62, %36,7 ve n=93, %52,5) görülmüştür. Büyük işletmelerdeteat dipping (%70,4), kuru dönem antibiyotik (%72,8), teat seal(%9,5) vemastitis aşısı (%55,6) uygulamalarının küçük ölçekli işletmelerden dahayüksek olduğu tespit edilmiştir. Büyük işletmelerde predipping (%59,2)ve postdipping uygulaması yapanların oranının (%67,5) yapmayanlardandaha fazla olduğu ve uygulamalarda en fazla iyotlu antiseptiklerin kullanıldığı belirlenmiştir. Küçük ölçekli işletmelerde sağım hijyeni uygulamayanların oranının (%61,6) fazla olduğu tespit edilmiştir. Bu iki tip işletmede günlük ortalama süt verimi üzerine işletme tipi (p<0,000) ve ırkın(p<0,001) etkisi istatistiksel olarak önemli bulunmuştur.Öneri: Sonuç olarak, Türkiye’deki süt sığırı işletmelerinde mastitisdenkoruma ve mastitisin kontrolu? amaçlı uygulanan yöntemlerin oranlarının,geçmiş yıllarla karşılaştırıldığında daha yüksek olduğu fakat istenen düzeylerde olmadığı tespit edilmiştir

A Simple Procedure may Cause Severe Results

Capillary blood sampling via a heel puncture is a common procedure performed on hospitalized neonates. If not performed properly, a heelstick can lead to complications. The clinical and financial impact of complications can be significant. Also in some situations, the procedure could be complicated with skin infections, hematomes, soft tissue infections, arthritis and osteomyelitis. We report an infant complicated with arthitis and soft tissue infection secondary to heel puncture and we want to emphesize the importance of neonatal procedures

Avrupa Birliği'nin Türk Polis Teşkilatı Uygulamalarına Etkisi

Tez (Yüksek Lisans) -- Kırıkkale Üniversitesi47995