Erzincan ve Çevresinde Yayılış Gösteren Doğal Gül ( Rosa L.) Taksonları

Roses (Rosa L. ) is known as the genus of fragrant, nice-looking plants of Rosaceae family. Rosa which has a history older than the history of humanity, due to the alluring beauty and nice- smell were cultivated and used throughout the age

Causes of Academic Procrastination of Students Who Made Class Repetition

Araştırmanın amacı ise, sınıf tekrarı yapan lise 1 ve 2. sınıf öğrencilerinin akademik erteleme davranışını, kendini toparlama, yaşam doyumu, akademik özdeşleşme ve motivasyon değişkenleriyle oluşturulan bir model kapsamında test etmektir. Nedensel karşılaştırmalı yönteminin kullanıldığı araştırmada, 2013-2014 eğitim öğretim yılında, sınıf tekrarı yapan 234 lise öğrencisi üzerinde yapılmıştır. Araştırma grubundaki öğrencilerin 92 (%40)'si erkek ve 140 (%60)'ı kız öğrencidir. Veri toplama aracı olarak; Aitken (1982) tarafından, geliştirilmiş, Balkıs (2007) tarafından Türkçeye uyarlanmış, Akademik Erteleme Ölçeği; Terzi (2006) tarafından geliştirilmiş Kendini Toparlama Gücü Ölçeği; Diener (2004) tarafından geliştirilen ve Köker (1991) tarafından Türkçe'ye uyarlanan Yaşam Doyumu Ölçeği; Bozanoğlu (2004) tarafından geliştirilen Akademik Güdülenme (Motivasyon) Ölçeği; Balkıs, Duru ve Buluş (2009) tarafından geliştirilmiş Akademik Özdeşleşme Ölçeği araştırmada kullanılmıştır. Araştırma sonuçlarına göre, nihai modele ilişkin elde edilen uyum katsayıları kabul edilen sınırların oldukça üzerinde çıkmıştır. NFI, CFI, GFI, IFI, TLI' nın .90'ın üzerinde çıkması o modelin iyi uyum gösterdiğini işaret etmektedir. Ki-Kare (X2 /sd3.33/2) 1.67 ve RMSEA .048 bulunmuştur. Aynı zamanda, motivasyon değişkeninin akademik ertelemeye doğrudan, anlamlı ve negatif yönlü etki yaptığı görülmektedir (t-5.74, p.01). Motivasyonun akademik ertelemeye doğrudan etki değeri ? .40 olduğu görülmektedir. Buna göre, öğrencilerin motivasyonun artması ile birlikte, akademik erteleme davranışlarının azaldığını söylenebilirThe purpose of the research is to test the academic procrastination behaviours of 1st and 2nd grade high school students within the scope of a model with variables of self-recovery, life satisfaction, academic identification and motivation. The research that used the causal comparative method were carried out on 234 high school students who made a class repetition in the academic year of 2013-2014. 92 (40%) of the students in the research group were male and 140 (60%) of them were female students. As the tool for data collecting, Academic Procrastination Scale developed by Aitken (1982) and adopted into Turkish by Balkıs (2007), Self-Recovery Power Scale developed by Terzi (2006), Life Satisfaction Scale developed by Diener (2004) and adopted into Turkish by Köker (1991), Academic Motivation Scale developed by Bozanoğlu (2004), Academic Identification Scale developed by Balkıs, Duru and Buluş (2009) are used in the research. According to the research results, received fit coefficients related to final model are resulted highly above of acceptable limits. That the NFI, CFI, IFI and TLI values are above .90 indicates that this model adjusts well. Chi-square value was found as (X2 /sd3.33/2) 1.67 and RMSEA was found as .048. Also, motivation variable affects academic procrastination in a direct, meaningful and negative ways (t-5.74, p.01). Motivation’s direct affect value to the academic procrastination is found as ? -.40. Accordingly, it can be said that students’ academic procrastination behaviours decrease along with improved motivatio

GC-MS analysis and in vitro antioxidant and enzyme inhibitory activities of essential oil from aerial parts of endemic Thymus spathulifolius Hausskn. et Velen

We investigated the antioxidant and enzyme inhibitory activities and chemical composition of the hydro-distilled essential oil (0.35% yield) from aerial parts of Thymus spathulifolius. Antioxidant capacity of the oil was assessed by different methods including free radical scavenging (DPPH and ABTS), reducing power (FRAP and CUPRAC) and phosphomolybdenum assay. Inhibitory activities were analyzed against acetylcholinesterase (AChE), butyrylcholinesterase (BChE), alpha-amylase, alpha-glucosidase, and tyrosinase. Twenty-one constituents were identified representing 97.2% of the total oil with thymol (50.5%), borneol (16.7%) and carvacrol (7.7%) as the major components. The essential oil exhibited good antioxidant activity with IC50 values of 3.82 and 0.22 mg/mL determined by free radical scavenging DPPH and ABTS, respectively. EC50 values of FRAP and CUPRAC were found to be 0.12 and 0.34 mg/mL, respectively. The results of the present study support the uses of T. spathulifolius essential oil as a source of natural antioxidants and bioactivities for functional foods and phytomedicines

Nature of the Early Cretaceous lamprophyre and high-Nb basaltic dykes, NE Turkey: Constraints on their linkage to subduction initiation of Neotethyan oceanic lithosphere

Late Mesozoic evolution of the Neotethys Ocean is critical and still remains unclear along the entire Sakarya Zone (SZ), Turkey, because previous interpretations of the Middle to Late Jurassic rifting of the SZ have not been consensually accepted. We identified, for the first time, the Early Cretaceous dykes intruded into the Late Jurassic and Late Carboniferous bodies in the Çamlıkaya (Erzurum) area in the SZ. Here, we present a data set of new field observations, 40Ar/39Ar geochronology, whole-rock geochemical and Sr–Nd isotopes to find out the tectonic setting of previously undated basic to intermediate igneous rocks. 40Ar/39Ar technique on the groundmass separations yielded the plateau ages of 128.78 ± 1.02 to 122.89 ± 0.82 Ma. The investigated dykes are compositionally divided into two sub-groups: calc-alkaline lamprophyres (CAL) and high-Nb alkaline basalts (HNB). They show enrichment in large ion lithophile elements (LILE: e.g., Rb, Ba, K) and depletion in high field strength elements (HFSE: Nb and Ti) as well as moderate fractionation of light rare earth elements relative to heavy rare earth elements. The HNB have high Mg# (47–66), and relatively unradiogenic Sr [87Sr/86Sr(t) = 0.70385 to 0.70510] and Nd [?Nd(t) = +0.5 to +5.3] isotopic composition, whereas the CAL possess moderate to high Mg# (32–72), and relatively high Sr [87Sr/86Sr(t) = 0.70586 to 0.71379] and Nd [?Nd(t) = +1.5 to ?9.9] isotopic composition. Early Cretaceous high-angle subduction triggered upwelling of the asthenosphere at 126 Ma, which likely generated a heat anomaly. This anomaly has probably induced melting of the oceanic slab and the metasomatized mantle to form the CAL and HNB. The HNB were generated by low degrees of melting of mantle domain that was previously reacted by oceanic slab-related adakitic melts at the depths of the garnet stability field (?70 km). However, the CAL were probably formed at shallower mantle levels within the garnet-amphibole field by a relatively higher degree of melting of the mantle, also modified by subducted slab sediments. A new field, age, and petrochemical data from the Early Cretaceous dykes, combined with the presence of Aptian deep-water sediments to the north and the Late Jurassic-Early Cretaceous platform carbonates deposited in the passive margin setting along the entire SZ, imply the initiation of active-margin magmatism in the SZ. We suggest that the coexistence of the Early Cretaceous CAL and HNB points to the formation of an Andean-type active margin above a north-dipping Neotethyan oceanic slab. Their emplacement ages are associated with the inception of the magmatic arc structure and refer to a significant geodynamic turnover from passive-margin to active-margin tectonics along the SZ. © 2020 Elsevier B.V.Recep Tayyip Erdogan Üniversitesi: FYL-2018-944This work was financially supported by the Recep Tayyip Erdoğan University , with a Project (grant# FYL-2018-944 ). We appreciate Dr. Serhat Köksal from the Middle East Technical University for his effort during the Sr–Nd radiogenic isotope analyses. We wish to express our sincere appreciation to an anonymous reviewer, Robert Moritz and editor-in-chief Michael Roden for their detailed comments and constructive suggestions, which have enabled us to improve the manuscript greatly

St. Jude Medical and CarboMedics Mechanical Heart Valves in the Aortic Position: Comparison of Long-Term Results

We designed this study to compare long-term results of St. Jude Medical and CarboMedics mechanical heart valves in the aortic position. We retrospectively analyzed the results of 174 consecutive patients who received either a St. Jude (n=80) or a CarboMedics (n=94) mechanical aortic valve from March 1992 through October 2004. The follow-up rate was 97.7%. The mean follow-up duration for the St. Jude group was 79.3 ± 35.0 and for the CarboMedics group, 70.0 ± 34.3 months. The cumulative follow-up was 523.8 and 530.1 patient-years, respectively. The 30-day mortality rates for the St. Jude and CarboMedics patients were 1.3% and 3.2%, respectively. The actuarial survival rate for the St. Jude group at 138.0 ± 4.7 months was 75.9% ± 0.1% and for the CarboMedics group at 130.8 ± 4.8 months was 69.8% ± 0.1% (P=NS). There was no structural valve deterioration in either group. Freedom from thromboembolic events was 87.7% for the St. Jude group and 83.0% for the CarboMedics group (P=NS). Freedom from bleeding events for the St. Jude group was 93.6% and for the CarboMedics group, 89.7% (P=NS). The results obtained from this study indicate that standard St. Jude Medical and CarboMedics aortic valve prostheses offer similar excellent clinical performance. Definitive judgment must await trials that are extensive, randomized, and prospective