10696 research outputs found
Sort by
A study of compaction of metal powders
No full textThis paper is a summary of an investigation of the compaction of metal powders. Two types of irregular atomized iron powders, a spherical copper powder and a bronze powder were uniaxially compacted in a floating-action die at pressures up to 950 MPa. Displacements during compaction were recorded continuously and density-compaction pressure relationships were obtained. Sequential stages of compaction were identified and interrelated in terms of particle rearrangement and deformation. The role of work hardening during compaction is described for the different powders
Electrical measurements of Hg1 - xMnxTe films grown by metalorganic vapour phase epitaxy
No full textPreliminary electrical measurements of mercury manganese telluride (MMT) films, grown by metalorganic vapour phase epitaxy (MOVPE), are reported. The epitaxial films were grown on insulating (100)GaAs substrates with a buffer layer of ZnTe and CdTe by the interdiffused multilayer process (IMP). Electrical transport measurements were made on samples of x = 0.05-0.08 and x = 0.08-0.11, at magnetic fields of up to 0.38 T, and for the temperature range of 20-300 K. It is demonstrated that both n- and p-type epilayers may be produced depending upon growth conditions, with extrinsic electron and hole concentrations of order 1015 and 1014 cm-3, respectively
Eksiklik Sendromu Olan ve Olmayan Şizofrenide Aleksitimi, Depresyon ve Negatif Belirtiler Arasındaki İlişki
No full textPubMed ID: 32594483Objective: The aim of this study was to compare schizophrenia patients with and without Deficit Syndrome (DS) with respect to alexithymia, depression and negative symptoms and to investigate the relationship between these variables. Method: A total of 210 schizophrenia patients who joined the study were grouped on the basis of the Schedule for the Deficit Syndrome (SDS). Each patient was evaluated using the Positive and Negative Syndrome Scale (PANSS), the Calgary Depression Scale for Schizophrenia (CDSS), the Toronto Alexithymia Scale (TAS) and the UKU- Side Effect Rating Scale (UKU-SERS). Results: The DS group had higher alexithymia scores that were not related to the negative symptoms. The prevalence of depression was significantly lower in the same group. Positive symptoms in the DS group were negatively correlated with the two TAS subscales of difficulty describing and identifying feelings. The negative symptoms scores of all the patients with and without DS correlated positively with the mean score on the TAS subscales. The severity of depressive and the negative symptoms predicted alexithymic symptoms. Conclusion: Lack of a correlation between the negative symptoms and alexithymic symptoms in DS suggested that the respective symptoms represented different independent phenomena in schizophrenia. A future study might explore the relationship between alexithymia and negative symptoms in association with cognitive functioning.Made available in DSpace on 2020-11-20T14:40:29Z (GMT). No. of bitstreams: 0
Previous issue date: 2019Amaç: Bu çalışmada Eksiklik Sendromu (ES) olan ve olmayan şizofreni hastalarının aleksitimi, depresif ve negatif belirtiler açısından karşılaştırılması ve bu değişkenler arasındaki ilişkinin incelenmesi amaçlanmıştır.
Yöntem: Çalışmaya 210 şizofreni hastası katıldı. Hastalar Eksiklik Sendromu Çizelgesi’ne göre ES olan ve olmayan olarak ayrıldı. Her hastaya Pozitif ve Negatif Sendrom Ölçeği (PANSS), Calgary Şizofrenide Depresyon Ölçeği (CŞDÖ), Toronto Aleksitimi Ölçeği (TAÖ), UKU (Udvalg for Klinikse Undersogelser) İlaç Yan Etki Ölçeği uygulandı.
Bulgular: ES grubunda aleksitimi puanlarının daha yüksek olduğu ve negatif belirtilerle ilişkili olmadığı saptandı. Bu grupta depresyon görülme oranı da anlamlı olarak düşük bulundu. ES olan şizofreni hastalarında pozitif belirti puanları ile duyguları tanıyamama ve duyguları ifade edememe alt ölçek puanları arasında negatif yönde
bir ilişki saptandı. Şizofreni hastalarının (ES olan ve olmayan) negatif belirti puanları ile TAÖ ölçeğinin alt ölçeklerinden aldıkları ortalama puanlar pozitif yönde ilişkili bulundu. Depresif ve negatif belirtilerin şizofreni hastalarındaki (ES olan ve olmayan) aleksitimik özelliklerin
yordayıcısı olduğu bulundu.
Sonuç: Çalışmamızda ES olan grupta aleksitimi ile negatif belirtiler arasında ilişki bulunmaması aleksitimi ve negatif belirtilerin ayrı ve bağımsız kavramlar olduklarını düşündürmektedir. Gelecekte aleksitimik belirtiler ile negatif semptomatolojinin bilişsel fonksiyonlarla ilişkisi birlikte değerlendirilebilir
A case of pulmonary thromboembolism with ST elevation and literature review
No full textElectrocardiography (ECG) is an auxiliary test applied for differential diagnosis of Pulmonary Thromboembolism (PTE). However, its specificity is low, but it is more often used for differential diagnosis. Although there are some changes on ECG in PTE, ST elevation is not a finding that we expect to see. With this case report, we aimed to draw attention to the issue with the diagnosis of PTE in a patient with ST elevation in ECG. 52-year-old male patient presented to the emergency department with a complaint of convulsion after chest and back pain. During the examination in the emergency department, he had a convulsion and woke up on his own without entering a postictal phase. After that, he had a chest pain. For this reason, ECG was performed to the patient and revealed ST elevation in leads DI, AVL, V1-4. The results of the patient's EEG and head computer tomography (CT) were normal, so coronary CT angiography was performed. And it was observed that the coronary arteries were patent but embolism was detected in his cross-sectional pulmonary arteries. Thus, he was treated with the diagnosis of PTE. By the obtained results in this case that ST elevation may be a finding of PE, although it is rare
Phytochemical Fingerprints and Bioactivities of Ripe Disseminules (Fruit-Seeds) of Seventeen Gundelia (Kenger-Kereng Dikeni) Species from Anatolia with Chemometric Approach
No full textGundelia species are known as “Kenger-kereng dikeni” in Anatolia, and their aerial parts are consumed as food. Also, roots and seeds (disseminules) of the Gundelia species are used to prepare gum and coffee. The chemical contents of ethanol and hexane extracts of disseminules of 17 Gundelia species, 13 of them are endemic, were studied using LC/MS/MS and GC/MS. Additionally, their antioxidant potential and enzyme inhibitory capacity against acetyl- and butyryl-cholinesterase, urease, and tyrosinase were determined. The unsaturated fatty acid ratios of Gundelia species were higher than their saturated fatty acid ratio. The highest sum of oleic and linoleic acid was detected in G. tournefortii var. tenuisecta (70.42 %). β-Sitosterol, α-amyrin, 3-acetyllupeol were identified in 17 Gundelia species by GC/MS, while chlorogenic acid and luteolin by LC/MS/MS as major compounds. The ethanol and hexane extracts of G. siirtica, G. rosea, and G. mesopotamica indicated good cholinesterase inhibitory activity. Among all species, ethanol extract of G. colemerikensis exhibited the best activity in ABTS (IC50: 32.30±0.98 μg/mL), DPPH (IC50: 59.91±0.89 μg/mL), and CUPRAC (A0.5: 57.41±1.03 μg/mL) assays. Ethanol extract of G. colemerikensis also displayed the highest inhibitory activity against butyrylcholinesterase (51.14±0.25 % at 200 μg/mL), urease (51.71±1.75 % at 200 μg/mL), and tyrosinase (39.50±0.85 % at 200 μg/mL) enzymes. According to the chemometric analysis of fatty acids, four groups were observed. Therefore, it is suggested that G. colemerikensis can be used in the pharmaceutical, food, and cosmetic industries due to its antioxidant and enzyme inhibition properties
Comprehensive analysis of lifeboat accidents using the Fuzzy Delphi method a; b
No full textAccidents that result in personnel injury or death occur in lifeboats, which are some of the most reliable means of abandoning a ship during drills, routine maintenance, and tests. Comprehensive research on lifeboat accidents is non-existent in literature. This article aims to prioritize the factors responsible for lifeboat accidents and to provide comprehensive recommendations for managers, policymakers, and seafarers. For this purpose, the Fuzzy Delphi method was used in the study. Twelve lifeboat accidents reported by flag states were examined, and detailed accident analyses were made by 12 field experts. As a result of the study, human errors, equipment unsuitability, lack of knowledge, and language problems of the personnel were determined as the most important factors in the causes of lifeboat accidents