PANI Konsantrasyonunun PP/PANI Kompozitlerinin Mekanik Özelliklerine Etkisi

Bu çalışmada, farklı konsantrasyonlarda (ağırlıkça %0,3-%3,0 arası) Polyanilin (PANI) katkısının Polipropilen/Polyanilin (PP/PANI) film kompozitlerinin mekanik özelliklerine etkisi araştırılmıştır. Sıcak presleme tekniği ile elde edilen kompozit filmlerin, yüzey özellikleri ve yapısal morfolojileri (SEM ve FTIR), termal özellikleri (TG) belirlenmek üzere karakterize edilmiştir. PANI katkısının polipropilen filmlerin mekanik özelliklerine etkisi çekme testleri ile incelenmiştir. Özellikle, kompozitlerin çekme dayanımı, Elastisite modülü ve yüzde kopma uzama miktarları test edilmiştir. Sonuçlarımıza göre, PANI katkısının polipropilenin mekanik özelliklerinde belirgin bir etkisi olduğu görülmüştür. Çekme gerilimi, PP/0.6 wt.% PANI kompozitlerinde en yüksek değere ulaşılmıştır.In this study, the effect of PANI additive with different concentrations (0.3-3.0 wt.%) on mechanical properties of Polypropylene/Polyaniline (PP/PANI) film composites have been investigated. The composites films obtained from the hot pressing technique have been characterized to determine their surface properties and structural morphology (SEM and FT-IR), thermal properties (TG). The effects of PANI additive on mechanical properties of polypropylene have been examined by tensile tests. In particular, tensile strength, Young's modulus and percentage strain at break of the composites have been tested. According to our results, it has been observed that the PANI additive in polypropylene had a significant impact on its mechanical properties. The tensile strength has been reached highest value in PP/0.6 wt.% PANI composites

ASSESSMENT OF ANAEROBIC POWER WITH ARM AND LEG WINGATE TESTS IN ATHLETES

The research was carried out with the aim of determining and assessing arm anaerobic power, leg anaerobic power and aerobic capacity in individuals with different branches of active sports. A total of 60 subjects engaged in active sports at Elite level in different branches participated in the study. These branches are; wrestling (group G, n:10), football (Group F, N = 10), bicycle (BI group, n = 10), boxing (BO group, n = 10), taekwondo (TA group, n = 10), and tennis (TE group, n = 10). The research was carried out in the performance Laboratory of Selçuk University School of Physical Education and Sports. For anaerobic measurements, two separate Monark branded Wingate ergometers for arm and leg were used. Shuttle run tests were performed for aerobic measurements. SPSS for Windows 15.0 package program was used in the calculation and assessment of the obtained data. The normality distribution of the measured parameters was determined by the Shapiro-Wilks test. One-way variance analysis (ANOVA) was used to determine the differences between sports branches. In determining the source of difference, the LCD and Dunnett's C were applied from Post-Hoc tests. Significance level was taken as 0.05 in this study. As a result of the leg Wingate ergometer test, the peak power values of wrestlers were found to be significantly different at p<0.05 level compared to those of football, boxing, taekwondo and tennis players. The results of arm Wingate ergometer test showed that the peak power values of the boxers and wrestlers were significantly different in p<0.05 compared to the athletes in other branches. When their MaxVO2 levels were examined, it was observed that the values of cyclists differ significantly in p<0.05 compared to the average of athletes in other branches except wrestlers.  Article visualizations

An alternative anterior tension free preperitoneal patch technique by help of the endoscope for femoral hernia repair

AbstractBackgroundFemoral hernias are relatively uncommon and have a higher risk for strangulation and incarceration. We introduce an alternative anterior tension free inlay patch technique by help of the endoscope for femoral hernia repair.MethodCharacteristics of patients undergoing femoral hernia repair between March 2006–April 2011 and description of the surgical technique is presented.ResultsWe analyzed our experience with this technique in 26 consecutive patients with femoral hernias (1 bilateral, 15 right, 10 left femoral hernia) in 5 year period. Seven of these 26 femoral hernias were recurrent and 2 of them were concomitant with inguinal hernia. Mean operation time was 30.0 ± 12.1 min. Seroma was seen in 2 patients at postoperative 1st week. There were no; hematoma, wound infection and separation of wound edges and early recurrence at postoperative 1st week and 1st month. The mean follow up period was 41.8 ± 18.2 months. All of 22 patients who were contacted were satisfied with the operation. There was no recurrence, chronic pain and foreign body feeling in any patient at the end of the follow-up period.ConclusionThis feasible and safe alternative anterior inlay patch repair might be used in all femoral hernias with the exception of the ones requiring intestinal resection

Correlation between the serum and tissue levels of oxidative stress markers and the extent of inflammation in acute appendicitis

OBJECTIVES: To determine the serum and tissue levels of markers of impaired oxidative metabolism and correlate these levels with the histopathology and Alvarado score of acute appendicitis patients. METHOD: Sixty-five acute appendicitis patients (mean age, 31.4±12.06 years; male/female, 30/35) and 30 healthy control subjects were studied. The Alvarado score was recorded. Serum samples were obtained before surgery and 12 hours postoperatively to examine the total antioxidant status, total oxidant status, paraoxonase, stimulated paraoxonase, arylesterase, catalase, myeloperoxidase, ceruloplasmin, oxidative stress markers (advanced oxidized protein products and total thiol level) and ischemia-modified albumin. Surgical specimens were also evaluated. RESULTS: The diagnoses were acute appendicitis (n = 37), perforated appendicitis (n = 8), phlegmonous appendicitis (n = 12), perforated+phlegmonous appendicitis (n = 4), or no appendicitis (n = 4). The Alvarado score of the acute appendicitis group was significantly lower than that of the perforated+phlegmonous appendicitis group (p = 0.004). The serum total antioxidant status, total thiol level, advanced oxidized protein products, total oxidant status, catalase, arylesterase, and ischemia-modified albumin levels were significantly different between the acute appendicitis and control groups. There was no correlation between the pathological extent of acute appendicitis and the tissue levels of the markers; additionally, there was no correlation between the tissue and serum levels of any of the parameters. CONCLUSIONS: The imbalance of oxidant/antioxidant systems plays a role in the pathogenesis acute appendicitis. The Alvarado score can successfully predict the presence and extent of acute appendicitis

Identification of salivary mucin MUC7 binding proteins from Streptococcus gordonii

<p>Abstract</p> <p>Background</p> <p>The salivary mucin MUC7 (previously known as MG2) can adhere to various strains of streptococci that are primary colonizers and predominant microorganisms of the oral cavity. Although there is a growing interest in interaction between oral pathogens and salivary mucins, studies reporting the specific binding sites on the bacteria are rather limited. Identification and characterization of the specific interacting proteins on the bacterial cell surface, termed adhesins, are crucial to further understand host-pathogen interactions.</p> <p>Results</p> <p>We demonstrate here, using purified MUC7 to overlay blots of SDS-extracts of <it>Streptococcus gordonii </it>cell surface proteins, 4 MUC7-binding bands, with apparent molecular masses of 62, 78, 84 and 133 kDa from the <it>Streptococcus gordonii </it>strain, PK488. Putative adhesins were identified by in-gel digestion and subsequent nanoLC-tandem mass spectrometry analysis of resultant peptides. The 62 kDa and 84 kDa bands were identified as elongation factor (EF) Tu and EF-G respectively. The 78 kDa band was a <it>hppA </it>gene product; the 74 kDa oligopeptide-binding lipoprotein. The 133 kDa band contained two proteins; alpha enolase and DNA-directed RNA polymerase, beta' subunit. Some of these proteins, for example alpha enolase are expected to be intracellular, however, flow cytometric analysis confirmed its location on the bacterial surface.</p> <p>Conclusion</p> <p>Our data demonstrated that <it>S. gordonii </it>expressed a number of putative MUC7 recognizing proteins and these contribute to MUC7 mucin binding of this streptococcal strain.</p

MATHEMATICAL MODELLING OF PLACEMENT OF EMERGENCY PHONE CENTRES IN A CAMPUS NETWORK

Bir G grafında, seçilen bazı tepeler yardımıyla grafın tüm ayrıtlarını tanımlama graf örtüsü problemi olarak bilinir. Başka bir açıdan bakıldığında örtü problemi; sayılabilir bir küme üzerinde verilmiş bir bağıntıyı, bu kümenin minimum sayıda elemanını kullanarak tanımlama olarak düşünülebilir. Optimizasyon teorisinde; bir G grafının örtü kümeleri içinden en az elemanlısını bulmaya minimal örtü problemi adı verilir. Bu problem literatürde bir discrete optimizasyon problemi olarak bilinmektedir. Problem doğrusal programlama ile matematiksel olarak ifade edilebilir. Bu çalışmada iletişim ağı grafla modellenerek, bu ağda ilişkileri minimum sayıda elemanla tanımlayan graf örtüsü problemi ele alınmıştır. Örtü probleminin genel doğrusal programlama modeli verilerek çözüm araştırılmıştır. Daha sonra uygulama problemi olarak ele alınan, Ege Üniversitesi Kampüsünde güvenliği sağlamak amacıyla acil telefonlarının yerleştirilmesi problemi, bir örtü problemi olarak modellenmiştir. Elde edilen doğrusal programlama problemi WQSB programı yardımı ile çözülüp minimum sayıda hangi noktalara telefon yerleştirilmesi gerektiği hesaplanmıştır. In this study graph set covering problem which is a problem of defining relations in a network by using less number of objects, is examined by the aid of graphs that are used mostly in design of communication networks. Cover problem is also known as the distinct optimization problem in this field of study. The problem of placement of emergency phones in Ege University Campus to provide security is considered as a cover problem. The obtained linear programming problem is solved by WQSB and the result that at least number of places which a phone is required to be placed, is found

Measuring tactical creativity with the help of divergent thought: Example of TRNC U-21 football teams

This study aims on the assessment of the situations of tactical orientation of 36 young, elite soccer players born in the years 1999-2000-2001, selected between 2 cities, 6 teams which belong to Cyprus Turkish Football Association (Kıbrıs Türk Futbol Federasyonu) in Turkish Republic of Northern Cyprus. This study evaluates the aspects in two ways. In order to evaluate the tactical directed situations, specific tactics and creative performance were measured with respect to Game Test. In case 1, Longitudinal design was carried to analyse intra-individual improvements of elite young football players according to football-specific creativity and tactical game intelligence by using a dynamic performance diagnostic tool. In case 2, cross-sectional design was carried in which objective, valid, differentiative enough to record, tactical indicators were created to measure football-specific creativity and game intelligence as a diagnostic instrument. In both of the studies, different evaluation criteria were spotted and with these criteria, players were scored. According to these scores, divergent tactical thinking results has been obtained. The results according to divergent tactical thinking showed that disparate changes were obtained in between the players of KTFF U-21. As a result, the practical implications for the processes of training has been deeply discussed in both cases

OTURMA MOBİLYASI TASARIMINDA BİLGİSAYAR DESTEKLİ ERGONOMİK ANALİZ

Çalışmada, insanların birebir ilişkide olduğu oturma mobilyalarının tasarımında, ergonomik kriterlerin belirlenmesi amacıyla bir “insan odaklı ürün geliştirme” yazılımının (Anybody Technology) kullanılabilirliği araştırılmıştır. Yapılan örnek uygulamada, oturma derinliği, oturma yüksekliği ve arkalık eğim açısı farklı olan 2 adet sandalyede oturan insanın kas–iskelet sisteminde oluşan yükler niceliksel olarak analiz edilmiştir. Ayrıca, 10 erkek deneğin katılımıyla uygulanan bir anket yardımı ile de bu iki farklı sandalyede oturan bireylerin çeşitli vücut bölgelerinde hissettikleri duygular niteliksel olarak belirlenmiştir. Çalışma sonucunda, ürün geliştirme yazılımından alınan veriler, anketlerden alınan veriler ile tutarlı olup, insan odaklı ürün geliştirme yazılımının tasarlanacak mobilyaların ergonomik kriterlerinin belirlenmesinde kullanılabilir olduğunu doğrulamaktadır