A database for evaluating stocks trading in ISE

Ankara : Department of Management and Graduate School of Business Administration, Bilkent Univ., 1994.Thesis (Master's) -- Bilkent University, 1994.Includes bibliographical references leaves 9This thesis is a design of a database that will store and manage the data of Istanbul Stock Exchange. The system is capable of storing the data of all companies for the time periods defined, adjusting price data to normalize capital increase and dividend effects, and producing custom designed reports to provide users flexibility. The program, which provides interface to database, is menu driven and user friendly.Kaya, ArdaM.S

FT-IR Spectroscopy Based Evaluation of Changes in Primary Metabolites of Amsonia orientalis after In vitro 6-benzylaminopurine Treatment

Amsonia orientalis Decne. (syn. Rhazya orientalis (Decne.) A. DC.) is only cultivated as an ornamental plant but also has a medicinal merit. The natural populations of the species were taken under conservation as per the Bern Convention by European Council. As one of the most common plant growth regulators and synthetic agricultural fertilizers, the effects of 6-benzylaminopurine (BAP) at different concentrations on primary metabolites of in vitro propagated A. orientalis have been investigated by using Fourier transform infrared (FT-IR) spectroscopy. Among all applied concentrations, 2.0 mg l-1 BAP resulted in increment of hydrogen bonded polysaccharide and proteins concentrations, lipid structure and membrane fluidity. Treatments of 2.0 and 4.0 mg l-1 BAP increased the existence of ferulic acid which also indicates the linkage of xylan and both cellulose and hemicellulose content. There was a significant decrease in the area of the peak which indicated the C=O stretching of proteins and pectins for 0.5 and 1.0 mg l-1 BAP while there was a significant increase for 2.0 and 4.0 mg l-1 of BAP treatments. The evaluation of molecular data from FT-IR spectroscopy as in the current study might help to estimate different physiological changes at the molecular level in plants depending on plant growth regulator and/or fertilizer applications. Thus, this FT-IR based method can be applied to in vitro propagation studies and also to studies focused on effects of pesticide and/or herbicide applications on plants to understand the metabolic changes in target species

Cognitive performance in young and middle-aged adults with migraine: Investigating the correlation with white matter hyperintensities and psychological symptoms

Introduction This study aimed to evaluate the cognitive performance of migraine patients with (MwA) and without aura (MwoA) and investigate the correlation of white matter hyperintensities (WMHs) and psychological symptoms with their cognitive test scores. Material and methods Hundred migraine patients aged 20–55 years and 80 healthy volunteers with similar age, sex, and education level were enrolled. The total Montreal Cognitive Assessment (MoCA) scores were compared by age, sex, presence of aura, migraine duration, attack frequency, pain localization, presence and number of WMHs, and the scores of the Beck Depression Inventory and the Beck Anxiety Inventory (BAI). Results Forty-seven (47%) patients had MwA and 53 (53%) had MwoA. The performance of the MwA patients was significantly poorer than that of the MwoA patients and the healthy subjects on the MoCA scales. In particular, the results revealed lower scores in the subscales regarding visuospatial/executive functions, naming, memory, attention, and abstraction in MwA patients than in the MwoA patients. Compared to healthy controls, more number of migraine patients had WMHs. The presence and number of WMHs had no significant correlation with the MoCA scores of the migraine patients. There was a significant correlation of the BAI and BDI scores with the total MoCA scores considering all migraine patients. Conclusions This study suggested that MwA may be associated with low cognitive performance which was correlated with depression and anxiety but not with WMHs. Further, longitudinal studies for assessing the relationship between WMHs, cognitive functions, and migraine, and for establishing the causality are warranted

The value of preoperative contrast-enhanced breast magnetic resonance imaging on surgical planning in breast cancer patients

Amaç: Meme kanserli olgularda, hastalığın evresinin doğru saptanması ve geri ye tümör dokusunun bırakılmaması uygun tedavi planlamasında belirleyici rol oynamaktadır. Meme manyetik rezonans görüntüleme (MRG), meme kanserli olgularda preoperatif cerrahi planlamasında kullanımı artan bir modalitedir. Bu çalışmanın amacı, prospektif olarak, meme kanserli kadınlarda, cerrahi önce si elde edilen meme MRG’nin cerrahi tedavi planlamaya katkısını araştırmaktır. Hastalar ve Yöntem: Çalışmaya 30 hasta dahil edildi. Lezyonlar Breast Imaging Reporting and Data System (BI-RADS) sınıflamasına göre 6 kategoride tanım landı. Veriler meme MRG incelemesi sonucu cerrahi planlamada yapılan değişik lik açısından analiz edildi. Bulgular: Hastaların primer tümör boyutları ile meme MRG ve histopatolojik değerlendirme ile ölçümlerinin yüksek düzeyde korelas yon gösterdiği saptandı (r:0.796, p:0.00). Meme MRG ile 11 hastada (%36) 14 ek lezyon saptandı. İki hasta hariç tüm olgularda histopatolojik değerlendirme so nuçlarının MRG bulguları ile uyumluluk gösterdiği görüldü. Tüm hasta grubunda meme MRG bulgularının cerrahi değişikliğe neden olduğu hasta oranı %17 idi. Mastektomi planlanan 16 olgunun 1’ine (%6.5) senkron kontrlateral meme kan seri nedeniyle ek meme koruyucu cerrahi (MKC) yapıldı. MKC planlanan olgula rın 4’ünde (%28) cerrahi plan mastektomi olarak değiştirildi. Hastaların 1’inde primer kanserin sınırları ve uzanımları, meme MRG ile daha net ortaya kondu ve MKC’den vazgeçilerek mastektomi uygulandı. Sonuç: Meme MRG bulgularının MKC planlanan hastalarda cerrahi planı de ğiştirebileceği klinik ve mamografik olarak saptanmış olup; preoperatif kont rastlı meme MRG’nin klinik ve mamografik saptanamayan okült invaziv ve no ninvaziv meme kanserlerinin yakalanmasında, tümör evrelemesinde, cerrahi planlamada rol oynadığı düşünülmektedir.Objective: Accurate detection of tumor stage and no recurrent tumor af ter surgery play a determinant role in surgical planning in breast cancer patients. Breast magnetic resonance imaging (MRI) is being increasingly used in preoperative planning for breast cancer. The aim of this study is to evaluate the incremental value of preoperative breast MRI to surgical plan ning in women with diagnosis of breast cancer. Patients and methods: Thirty patients were enrolled in this study. Lesions were categorized according to the Breast Imaging Reporting and Data System (BI-RADS) classification. The data were analyzed according to the benefits and detriments of MRI findings and changes in surgical planning made according to MRI results. Results: There was a high correlation between primary tumor size and breast MRI– histopathologic measurements (r:0.796, p:0.00). Fourteen additional lesions were detected in 11 patients (%36) with MRI. MRI findings were concordant with histopathologic results except in 2 patients. In 17% of total patient group, the surgical approach changed according to breast MRI findings. An additional breast- conserving surgery (BCS) was applied in 1 of 16 (%6.5) patients with synchroneus contrlateral breast cancer whom were planned to undergo mastectomy. In 4 patients (28%) with BCS decision, the surgical ap proach was changed to mastectomy. In one patient, the border and extansion of the primary cancer was detected more clearly by MRI and the decision of BCS was changed to mastectomy. Conclusion: We found that MRI findings accurately guided the CBS planning. Preoperative contrast-enhanced breast MRI plays an important role in detec tion, staging and surgical planning in invasive and noninvasive cancers

Recurrent hydatidiform moles: detection of a new mutation in the NLRP7 gene in the family

Hydatidiform moles are the most common type of gestational trophoblastic neoplasia. Hyperproliferative vesicular trophoblasts and imperfect fetal development are abnormal pregnancies, and recurrent hydatidiform moles are rare. Mutations in NLRP7 are responsible for recurrent hydatidiform mole. Genetic heterogeneity has been demonstrated in patients with the NLRP7 mutation. This study presents our case with gravida 11, parity 0, histopathologically diagnosed with six hydatidiform moles and five missed abortion histories at age 35. Karyotype analyses of the unrelated couple were normal. A genetic examination revealed a novel mutation of the NLRP7 gene in the patient, his brother, and his parents. Detecting a new NLRP7 mutation in recurrent hydatidiform moles cases provides further evidence for the predetermined role of NLRP7 mutations in the pathophysiology of recurrent moles hydatidiform. Based on our findings, we hope to contribute to the literature by expanding the spectrum of recurrent pregnancy loss associated with NLRP7 mutations in patients

Unraveling Molecular Fingerprints of Catalytic Sulfur Poisoning at the Nanometer Scale with Near-Field Infrared Spectroscopy

Fundamental understanding of catalytic deactivation phenomena such as sulfur poisoning occurring on metal/metal-oxide interfaces is essential for the development of high-performance heterogeneous catalysts with extended lifetimes. Unambiguous identification of catalytic poisoning species requires experimental methods simultaneously delivering accurate information regarding adsorption sites and adsorption geometries of adsorbates with nanometer-scale spatial resolution, as well as their detailed chemical structure and surface functional groups. However, to date, it has not been possible to study catalytic sulfur poisoning of metal/metal-oxide interfaces at the nanometer scale without sacrificing chemical definition. Here, we demonstrate that near-field nano-infrared spectroscopy can effectively identify the chemical nature, adsorption sites, and adsorption geometries of sulfur-based catalytic poisons on a Pd(nanodisk)/Al2O3 (thin-film) planar model catalyst surface at the nanometer scale. The current results reveal striking variations in the nature of sulfate species from one nanoparticle to another, vast alterations of sulfur poisoning on a single Pd nanoparticle as well as at the assortment of sulfate species at the active metal-metal-oxide support interfacial sites. These findings provide critical molecular-level insights crucial for the development of long-lifetime precious metal catalysts resistant toward deactivation by sulfur

Effectiveness of a multidimensional approach for prevention of ventilator-associated pneumonia in 11 adult intensive care units from 10 cities of Turkey: Findings of the International Nosocomial Infection Control Consortium (INICC)

Purpose: To evaluate the impact of the International Nosocomial Infection Control Consortium (INICC) multidimensional approach on the reduction of ventilator-associated pneumonia (VAP) in adult patients hospitalized in 11 intensive care units (ICUs), from 10 hospitals, members of the INICC, in 10 cities of Turkey. Methods: A prospective active before-after surveillance study was conducted to determine the effect of the INICC multidimensional approach in the VAP rate. The study was divided into two phases. In phase 1, active prospective surveillance of VAP was conducted using the definitions of the Centers for Disease Control and Prevention National Health Safety Network, and the INICC methods. In phase 2, we implemented the multidimensional approach for VAP. The INICC multidimensional approach included the following measures: (1) bundle of infection control interventions, (2) education, (3) outcome surveillance, (4) process surveillance, (5) feedback of VAP rates, and (6) performance feedback of infection control practices. We compared the rates of VAP obtained in each phase. A time series analysis was performed to assess the impact of our approach. Results: In phase 1, we recorded 2,376 mechanical ventilator (MV)-days, and in phase 2, after implementing the multidimensional approach, we recorded 28,181 MV-days. The rate of VAP was 31.14 per 1,000 MV-days during phase 1, and 16.82 per 1,000 MV-days during phase 2, amounting to a 46 % VAP rate reduction (RR, 0.54; 95 % CI, 0.42-0.7; P value, 0.0001.) Conclusions: The INICC multidimensional approach was associated with a significant reduction in the VAP rate in these adult ICUs of Turkey. © 2013 Springer-Verlag Berlin Heidelberg

Goodbye Hartmann trial: a prospective, international, multicenter, observational study on the current use of a surgical procedure developed a century ago

Background: Literature suggests colonic resection and primary anastomosis (RPA) instead of Hartmann's procedure (HP) for the treatment of left-sided colonic emergencies. We aim to evaluate the surgical options globally used to treat patients with acute left-sided colonic emergencies and the factors that leading to the choice of treatment, comparing HP and RPA. Methods: This is a prospective, international, multicenter, observational study registered on ClinicalTrials.gov. A total 1215 patients with left-sided colonic emergencies who required surgery were included from 204 centers during the period of March 1, 2020, to May 31, 2020. with a 1-year follow-up. Results: 564 patients (43.1%) were females. The mean age was 65.9 ± 15.6 years. HP was performed in 697 (57.3%) patients and RPA in 384 (31.6%) cases. Complicated acute diverticulitis was the most common cause of left-sided colonic emergencies (40.2%), followed by colorectal malignancy (36.6%). Severe complications (Clavien-Dindo ≥ 3b) were higher in the HP group (P < 0.001). 30-day mortality was higher in HP patients (13.7%), especially in case of bowel perforation and diffused peritonitis. 1-year follow-up showed no differences on ostomy reversal rate between HP and RPA. (P = 0.127). A backward likelihood logistic regression model showed that RPA was preferred in younger patients, having low ASA score (≤ 3), in case of large bowel obstruction, absence of colonic ischemia, longer time from admission to surgery, operating early at the day working hours, by a surgeon who performed more than 50 colorectal resections. Conclusions: After 100 years since the first Hartmann's procedure, HP remains the most common treatment for left-sided colorectal emergencies. Treatment's choice depends on patient characteristics, the time of surgery and the experience of the surgeon. RPA should be considered as the gold standard for surgery, with HP being an exception

Global wealth disparities drive adherence to COVID-safe pathways in head and neck cancer surgery

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