Filtreler
Filtreler
Bulunan: 8.082 Adet 0.010 sn
Koleksiyon [20]
Tam Metin [1]
Yayın Türü [14]
Yazar [20]
Yayın Yılı [20]
Tez Danışmanı [1]
Konu Başlıkları [20]
Yayıncı [20]
Yayın Dili [11]
Dergi Adı [20]
Editör/Editörler [20]
MICROSTRUCTURE AND MECHANICAL PROPERTIES OF COMPOSITES OF BOVINE DERIVED HYDROXYAPATITE (BHA) DOPED WITH NANO-POWDER OF LANTHANUM OXIDE

Pazarlioglu, S. S. | Karacayli, U. | Salman, S. | Yetmez, M. | Ozyegin, L. S. | Yilmaz, S. | Agathopoulos, S.

Conference Object | 2011 | INTERNATIONAL JOURNAL OF ARTIFICIAL ORGANS34 ( 8 ) , pp.700 - 701

WOS: 000299017900380

Analysis of peripheral blood lymphocyte phenotypes and Th1/Th2 cytokines profile in the systemic immune responses of Helicobacter pylori infected individuals

Kayhan B. | Arasli M. | Eren H. | Aydemir S. | Kayhan B. | Aktas E. | Tekin I.

Article | 2008 | Microbiology and Immunology52 ( 11 ) , pp.531 - 538

H. pylori elicits specific humoral and cellular immuneresponses inthemucosal immune system. However, the type and extent of T lymphocyte response in the systemic immune system is not clear for H. pylori positive patients. In this study, peripheral blood T lymphocyte phenotypes and serum Th1/Th2 based cytokines of 32 H. pylori positive patients were analyzed and compared to those of healthy controls. While ?ß TCR+ lymphocytes and their phenotype analysis were not significantly different to those of healthy controls, the percentage of pan ?? TCR+ lymphocytes was up to 2.4 times greater in the H. pylori positive group then in healthy c . . .ontrols. Furthermore, significant increases in IL-10 concentrations in serum samples of H. pylori patients indicated that their immune systems had switched toward a Th2 type immune response. The correlation between phenotype and type of T cell response in the peripheral blood during H. pylori infection is discussed. © 2008 The Societies and Blackwell Publishing Asia Pty Ltd Daha fazlası Daha az

2019-12-23

McCollough, John | Bayramoglu, Mehmet Fatih | He, Miao

Article | 2018 | INTERNATIONAL JOURNAL OF CONSUMER STUDIES42 ( 1 ) , pp.131 - 140

It is generally considered to be safer for the environment to repair a malfunctioning product for further reuse than to dispose of it and replace it with a newly manufactured product, unless the product is being replaced with a more energy efficient alternative. However, whereas United States has long been labelled a throwaway society', this paper presents the results of an international consumer survey which demonstrates that as other nations develop with respect to GDP per Capita (Gross Domestic Product per Capita), they too start transitioning into throwaway societies. This transition then calls into account of just how environme . . .ntally damaging this practice will become Daha fazlası Daha az

Time-dependent Coulomb stress changes induced by the 2002–2003 Etna magmatic intrusions and implications on following seismic activities

Pulvirenti F. | Aloisi M. | Jin S.

Article | 2017 | Journal of Volcanology and Geothermal Research344 , pp.185 - 196

In this paper, the relationship between the dike-forming magmatic intrusions and the faulting process at Mount Etna is investigated in terms of Coulomb stress changes. As case study, a complete time-dependent 3-D finite element model for the 2002–2003 eruption at Mount Etna is presented. In the model, which takes into account the topography, medium heterogeneities and principal fault systems in a viscoelastic/plastic rheology, we sequentially activated three dike-forming processes and looked at the induced temporal evolution of the Coulomb stress changes, during the co-intrusive and post-intrusive periods, on Pernicana and Santa Ven . . .erina faults. We investigated where and when fault slips were encouraged or not, and consequently how earthquakes may have been triggered. Results show positive Coulomb stress changes for the Pernicana Fault in accordance to the time, location and depth of the 27th October 2002 Pernicana earthquake (Md = 3.5). The amount of Coulomb stress changes in the area of Santa Venerina Fault, as induced by dike-forming intrusions only, is instead almost negligible and, probably, not sufficient to trigger the 29th October Santa Venerina earthquake (Md = 4.4), occurred two days after the start of the eruption. The necessary Coulomb stress change value to trigger this earthquake is instead reached if we consider it as induced by the 27th October Pernicana biggest earthquake, combined with the dike-induced stresses. © 2016 Elsevier B.V Daha fazlası Daha az

Changes of zinc, copper, and iron levels in the lung of male rats after subacute (4-week) and subchronic (13-week) exposure to formaldehyde

Özen O.A. | Songur A. | Sarsilmaz M. | Yaman M. | Kuş I.

Article | 2003 | Journal of Trace Elements in Experimental Medicine16 ( 02.Mar ) , pp.67 - 74

The medical use of formaldehyde has focused especially on laboratory use. Harmful effects of formaldehyde inhalation, such as nasal squamous cell carcinoma, are quite well documented. However, detailed studies of the mechanisms of the damaging effects of formaldehyde on lung tissue are quite limited. Amounts of such elements as zinc, copper, and iron within lung tissue indicate whether or not they function physiologically. In this study, 36 adult albino Wistar male rats (6 animals per group) were exposed to 0 (Control), 5, and 10 ppm (1 ppm ? 1.2 mg/m3) of formaldehyde gas for subacute (4-week) and subchronic (13-week) periods. Whol . . .e-body exposure was continuously carried out for 8 h/day, 5 days/week. Body weights were recorded weekly. Levels of metals mentioned above were measured in lung tissue by atomic absorption spectrometry using wet ashing and were then compared with levels in the control groups. At the end of the study, a gradual decrease in weight gain, a decrease in zinc levels, and an increase in iron levels were observed in both subacute and subchronic groups compared to control groups. Statistically significant increases in tissue Fe levels were seen in the 10 ppm subacute (P < 0.001), 5 ppm subchronic (P < 0.001), and 10 ppm subchronic (P < 0.001) groups. We conclude that subacute or subchronic exposure to cytotoxic concentrations of formaldehyde may cause growth retardation and alter the trace element levels of zinc and iron in the lung tissue. © 2003 Wiley-Liss, Inc Daha fazlası Daha az

Matematik Öğretmenlerinin Üstbilişi Harekete Geçirici Davranışlarının İncelenmesi İçin Gözlem Formunun Geliştirilmesi

Yıldız, Avni | Güven, Bülent

Article | 2017 | Mehmet Akif Ersoy Üniversitesi Eğitim Fakültesi Dergisi0 ( 41 ) , pp.1 - 19

Yapılan araştırmalar, farklı uygulamalar yoluyla öğrencilerin göstermektedir. Oysa öğretmenler, sınıf ortamında bilinçli ya da bilinçsiz şekilde öğrencilerinin bazen bilişlerine bazen de üstbilişlerine yönelik uygulamalar yapmaktadır. Bununla birlikte literatürde öğretmenlerin problem çözme süreçlerindeki faaliyetlerini ortaya koyan gözlem formları olmakla birlikte, doğrudan öğretmenlerin problem çözme ortamlarındaki faaliyetlerini üstbiliş yönünde inceleyen gözlem formları yer almamaktadır. Bu çalışma ile öğretmenlerin öğrencilerinin üstbilişlerini harekete geçirebilmek için ne gibi davranışlar sergilediklerini belirlemeye yönelik . . .bir gözlem formunun geliştirilmesi amaçlanmıştır. Bu araştırmada gözlem çizelgesinin geliştirilmesi sırasında uzman görüşleri doğrultusunda kuramsal formdan yararlanılmıştır. Kapsam geçerlik oranlarının belirlenmesi sürecinde ise Lawshe tekniğinden yararlanılmıştır. Pilot çalışma sonrasında gözlem çizelgesine eklenen bazı davranışlar nedeniyle gözlem çizelgesinin son halini elde etmek için Lawshe tekniğinin beşinci adımından başlayarak adımlar tekrarlanmıştır. Böylece gözlem çizelgesinin son halinde 15 uzman için a=0,05 anlamlılık düzeyinde kapsam geçerlik oranlarının minimum değeri 0.49 olarak bulunmuştur. metacognitions can be improved through different applications. consciously or unconsciously practicing their students' cognitions or metacognitions in the classroom. Although there are some observation forms that observe the activities of the teachers in the problem-solving environment, there are no observation charts that directly observe the activities of the teachers in the problemsolving process in terms of metacognition. In this study, it was aimed to develop an observation chart in order to determine the behaviors of teachers intended to promote students' metacognition in problem solving environments. In this study, the theoretical form was utilized in the direction of expert opinions during the development of the observation chart. Lawshe technique was used in determining the content validity rates. After the pilot study, the steps were repeated starting from the fifth step of the Lawshe technique to obtain the final version of the observation chart. As a result, the minimum value of content validity rates for 15 experts was found to be 0.49 at a significance level of a = 0.05 for the last version of the observation chart Daha fazlası Daha az

Examination of Group Counseling Program Sessions Based on Systemic Psychotherapy Approach in terms of Awareness of Participant towards Separation Individuation

Sahan, Birsen | Akbas, Turan

Article | 2017 | JOURNAL OF QUALITATIVE RESEARCH IN EDUCATION-EGITIMDE NITEL ARASTIRMALAR DERGISI5 ( 2 ) , pp.66 - 94

This research was prepared for the examination of group counseling program sessions based on systemic psychotherapy approach in terms of awareness of participant towards the separation individuation levels of the university students. The program was implemented to the students who voluntarily joined the groups in weekly sessions for ten weeks. Case study design was used for the research. Sessions were examined deeply. Qualitative findings obtained by analyzing the program were divided into four groups under the headings of separation anxiety, rejection expectancy, restriction anxiety and gains of the group members towards the sessio . . .ns. Under the theme of separation anxiety eight sub-themes containing need for approval, begrudge / compatible to be a good boy, taking the role of parents / over take responsibility, too rigid or overly permeable borders, intermingling of feelings and thoughts / nesting of the relationship, dependency / enter to control of others, to be included in the triangle and not to take responsibility were obtained. Six sub-themes were obtained under the theme of rejection expectancy containing afraid of making mistakes, distrust offing themselves and others, feeling worthless, not to say no, exclusion, self-blame and feeling guilty. Three sub-themes was obtained under the theme of restriction anxiety including withdrawal/remain unresponsive, conflict and cutting off emotional relationship. Also group members' awareness and gains were presented descriptively. This program would be helpful for the psychological counselors who work with individuals or families for the separation and individuation of their clients from their parents Daha fazlası Daha az

Evaluation of gingival crevicular fluid levels of tissue plasminogen activator, plasminogen activator inhibitor 2, matrix metalloproteinase-3 and interleukin 1-ß in patients with different periodontal diseases

Toyman U. | Tüter G. | Kurtiş B. | Kivrak E. | Bozkurt S. | Yücel A.A. | Serdar M.

Article | 2015 | Journal of Periodontal Research50 ( 1 ) , pp.44 - 51

Objectives: The purpose of this study was to evaluate the gingival crevicular fluid levels of interleukin-1beta (IL-1ß), matrix metalloproteinases-3 (MMP-3), tissue type plasminogen activator (t-PA) and plasminogen activator inhibitor 2 (PAI-2) in patients with chronic periodontitis, aggressive periodontitis (AgP) and healthy individuals (controls). Material and Methods: Systemically healthy (21 chronic periodontitis, 23 AgP and 20 controls) subjects were included in this study. Plaque index, gingival index, probing pocket depth and clinical attachment level were recorded and gingival crevicular fluid samples were collected. Assays . . .for IL-1ß, MMP-3, t-PA and PAI-2 levels in gingival crevicular fluid were carried out by an enzyme-linked immunosorbent assay. The one-sample Kolmogorov-Smirnov test, Mann-Whitney U test and Spearman correlation coefficient were used for data analyses. Results: Gingival crevicular fluid levels of t-PA and IL-1ß were significantly higher in chronic periodontitis and AgP groups than in the control group (p < 0.001). MMP-3 levels in gingival crevicular fluid were detected as significantly higher in the chronic periodontitis and AgP groups compared with the control group (p < 0.05). The t-PA/PAI-2 rate of patients with chronic periodontitis and AgP were significantly higher than the control group (p < 0.05). The positive correlations were found among the PAI-2, t-PA, IL-1ß and MMP-3 levels in gingival crevicular fluid. The volume of the gingival crevicular fluid correlated with all of the clinical parameters (p < 0.001). There were positive correlations between the gingival crevicular fluid levels of PAI-2 and the probing pocket depth and between gingival crevicular fluid levels of PAI-2 and the clinical attachment level (p < 0.01). Similarly, significant correlations were found between t-PA levels and probing pocket depth and between t-PA levels and clinical attachment level measurements (p < 0.001). Conclusion: The present data showed that gingival crevicular fluid levels of IL-1 ß, MMP-3 and t-PA increased in periodontal disease regardless of the periodontitis type and played a part in tissue destruction. © 2014 John Wiley & Sons A/S Daha fazlası Daha az

Right-to-left Shunt Through a Patent Foramen Ovale Left Open in the Management of Acute Right Heart Failure After Heart Transplantation

Ozdogan M.E. | Erer D. | Iriz E. | Oktar G.L. | Kula S. | Buyukates M.

Article | 2008 | Journal of Heart and Lung Transplantation27 ( 1 ) , pp.135 - 137

Severe pulmonary hypertension is a risk factor for mortality in heart transplantation due to elevated post-operative right heart failure. Various treatment modalities have been used in the management of pulmonary hypertension in the peri-operative period. We report a case of successful management of acute right heart failure after orthotopic heart transplantation by decompression of the right ventricle through the patent foramen ovale of the donor heart and inhalation of iloprost. © 2008 International Society for Heart and Lung Transplantation.

Effects of two different aquatic exercise trainings on cardiopulmonary endurance and emotional status in patients with knee osteoarthritis

Sahin H.G. | Kunduracilar Z. | Sonmezer E. | Ayas S.

Article | 2019 | Journal of Back and Musculoskeletal Rehabilitation32 ( 4 ) , pp.539 - 548

BACKGROUND: Aquatic exercises are often recommended for people with osteoarthritis (OA), however, there is a lack of evidence about the effects of these exercises. OBJECTIVES: The purpose of this study was to investigate the effects of two different aquatic exercise trainings on cardiopulmonary endurance and emotional status in patients with knee osteoarthritis. METHODS: Eighty-nine patients who had been diagnosed with knee osteoarthritis were divided into three groups as two different aquatic exercise training groups (only lower extremity training vs. lower extremity + upper extremity and trunk exercises) or the control group. All . . .groups have received the conventional therapy which consisted of hotpack, ultrasound, transcutaneous electrical nerve stimulation (TENS), and home exercises. Six-minute walk test (6MWT) and the Hospital Anxiety and Depression Scale (HAD) were used for assessing cardiopulmonary endurance and emotional status, respectively. RESULTS: Following the treatment, all groups improved in terms of systolic blood pressure, walking distance and total HAD scores. Group 1 showed additional improvements in diastolic blood pressure, heart rate and perceived exertion, while Group 2 showed additional improvements only in perceived exertion. Greater changes before and after the treatment in diastolic blood pressure at rest and following 6MWT, perceived exertion following 6MWT, walking distance, HAD depression scores and HAD anxiety scores were observed in Group 1. CONCLUSIONS: Exercise therapy consisting of only lower extremity exercises in water might be more effective in improving exercise capacity and depression levels in comparison to upper extremity and trunk added exercises or conventional physical therapy. © 2019 - IOS Press and the authors. All rights reserved Daha fazlası Daha az

Nonlinear speed controller supported by direct torque control algorithm and space vector modulation for induction motors in electrical vehicles

Aliskan I. | Gulez K. | Tuna G. | Mumcu T.V. | Altun Y.

Article | 2013 | Elektronika ir Elektrotechnika19 ( 6 ) , pp.41 - 46

Energy mode functions and their inverse signal dynamics can be used for the design of controllers in classical control algorithms, which use the error signals of related system parameters in general mode. Different from this common approach, Lyapunov function-based controller design is preferred and motor mechanical speed parameter is incorporated into the control operation in this study. The results of the experimental studies conducted for this study prove that when both electrical and mechanical parameters of the system are taken into consideration, the proposed controller, nonlinear speed controller supported by direct torque co . . .ntroller and space vector modulation, performs better than classical controllers and can be realized successfully Daha fazlası Daha az

A timelike Cauchy problem and an inverse problem for general hyperbolic equations

Amirov A. | Yamamoto M.

Article | 2008 | Applied Mathematics Letters21 ( 9 ) , pp.885 - 891

We prove a Carleman estimate for hyperbolic equations with variable principal parts and present applications to the unique continuation and an inverse problem. Our Carleman estimate covers cases which the existing Carleman estimates do not treat. © 2007 Elsevier Ltd. All rights reserved.

6698 sayılı Kişisel Verilerin Korunması Kanunu kapsamında yükümlülüklerimiz ve çerez politikamız hakkında bilgi sahibi olmak için alttaki bağlantıyı kullanabilirsiniz.

creativecommons
Bu site altında yer alan tüm kaynaklar Creative Commons Alıntı-GayriTicari-Türetilemez 4.0 Uluslararası Lisansı ile lisanslanmıştır.
Platforms