oalib

OALib Journal期刊

ISSN: 2333-9721

费用:99美元

投稿

时间不限

2017 ( 361 )

2016 ( 759 )

2015 ( 13190 )

2014 ( 17635 )

自定义范围…

匹配条件: “ Lóránd Silye” ,找到相关结果约387447条。
列表显示的所有文章,均可免费获取
第1页/共387447条
每页显示
On the age of the Dej Tuff, Transylvanian Basin (Romania)
Alexandru Szakács, , Zoltán Pécskay, Lóránd Silye, Kadosa Balogh, Daniela Vlad, Alexandrina Fül p
Geologica Carpathica , 2012, DOI: 10.2478/v10096-012-0011-9
Abstract: The Dej Tuff is an important stratigraphic marker in the Transylvanian Basin. However, its Early Badenian age is known only on biostratigraphical grounds so far. A number of radiometric dating techniques including K-Ar, Ar-Ar and fission-track have been used in order to constrain more precisely its age, allowing the calibration of the Transylvanian Basin's evolutionary models. Although individual dating methods could not provide a unique, reliable and accurate radiometric age, comparison and evaluation of multiple methods gives 14.8-15.1 Ma as the most likely formation age of the Dej Tuff.
Attila M. Demeter, Republikanizmus, nacionalizmus, nemzeti kisebbségek (Republicanism, nationalism, national minorities)
Rigán Lóránd
Journal for the Study of Religions and Ideologies , 2006,
Abstract: Attila M. Demeter, Republikanizmus, nacionalizmus, nemzeti kisebbségek (Republicanism, nationalism, national minorities) Pro Philosophia, Cluj, 2005
IL-2R, IL-6 and IL-8 Levels in Beh et's Disease
I??l ?nan?r,Ece Onur,Timur P?r?ldar,Kamer Gündüz
Turkderm , 2010,
Abstract: Background and Design: Immunological factors are considered to have an important role in the multifactorial ethiopathogenesis of Beh et’s disease (BD). Especially, Th1 cells function by expressing proinflammatory cytokines and neutrophil-attracting chemokines. Levels of IL-2R, IL-6 and IL-8 were evaluated in patients with BD in this study. Material and Method: Sixty-six patients with BD (36 with inactive and 30 with active) composed the study group and 22 subjects – the control group. Cytokine analyses were done with ELISA method by using commercial kits. ESR and CRP levels were also measured.Results: IL-2R, IL-6 and IL-8 levels in all patients, including the inactive ones, were not different from those in controls. CRP and ESR levels in patients were higher than in controls. IL-8 and CRP levels were increased in patient with active BD (p<0.05) when compared to those with inactive BD. Conclusion: Our study demonstrated elevated levels of serum IL-8, a chemokine activating monunuclear cells and neutrophils, in patients with active BD. IL-8 may be considered as an activity marker for BD.
Leptin Levels in Patients with Beh et's Disease
I??l ?nan?r,Kamer Gündüz,Ece Onur,Timur P?r?ldar
Turkderm , 2010,
Abstract: Background and Design: Leptin is a hormone, which regulates neuroendocrine function and also is involved in inflammatory processes. Proinflammatorycytokines, important inducers in the pathogenesis of Beh et’s disease, up-regulate the leptin levels. In this study, we aimed to compare leptin levels in patients with Behcet’s disease to those in controls and to investigate the correlation between leptin levels and disease activity. Material and Method: Fifty-three patients with Beh et’s disease (28 active and 25 inactive) composed the study group and 22 subjects-the control group. Leptin analyses were done by ELISA method using commercial kits. Erythrocyte sedimentation rate and C-reactive protein levels were also measured.Results: Leptin levels were increased in patients with Beh et’s disease compared to controls. Leptin did not correlate with disease activity. Conclusion: Leptin might have a possible role in the pathogenesis of Behcet’s disease.
Lamellar Ichtyosis: Case Report
Kamer Gündüz,Tuba ?elebi Kayhan,Gülsüm Gen?o?lan,I??l ?nan?r
Güncel Pediatri , 2009,
Abstract: Introduction: Ichtyosiform dermatoses are a group of hereditary disorders characterized by excessive scaling on the skin. Lamellar ichtyosis is an autosomal recessive disorder. The clinical findings are seen at birth and become widespread and prominent in time; gray-brown scales are seen all over the body. Emollients and keratolytics containing salicylic acid or glycolic acid are used topically. Symptoms are improved significantly by acitretin usage. Case Report: Here we present a 5-year-old girl with lamellar ichtyosis. She was born in a collodion membrane. Besides the skin scales, ectropion and deformities of the nails and ears were observed. Significant clinical improvement was seen with acitretin (10 mg/day) therapy. Conclusion: Lamellar ichtyosis is a severe form of ichtyosiform dermatoses and topical agents may be insufficient. Systemic acitretin treatment improves the symptoms significantly but long term side effects limit its usage. (Journal of Current Pediatrics 2009; 7: 154-7)
Dimensionality constraints of light induced rotation
László Oroszi,András Búzás,Péter Galajda,Lóránd Kelemen,Anna Mathesz,Tamás Vicsek,Gaszton Vizsnyiczai,l Ormos
Physics , 2015, DOI: 10.1063/1.4936180
Abstract: We have studied the conditions of rotation induced by collimated light carrying no angular momentum. Objects of different shapes and optical properties were examined in the nontrivial case where the rotation axis is perpendicular to the direction of light propagation. This geometry offers important advantages for application as it fundamentally broadens the possible practical arrangements to be realised. We found that collimated light cannot drive permanent rotation of 2D or prism-like 3D objects (i.e. fixed cross-sectional profile along the rotation axis) in the case of fully reflective or fully transparent materials. Based on both geometrical optics simulations and theoretical analysis, we derived a general condition for rotation induced by collimated light carrying no angular momentum valid for any arrangement: Permanent rotation is not possible if the scattering interaction is two-dimensional and lossless. In contrast, light induced rotation can be sustained if partial absorption is present or the object has specific true 3D geometry. We designed, simulated, fabricated, and experimentally tested a microscopic rotor capable of rotation around an axis perpendicular to the illuminating light.
Light Sailboats: Laser driven autonomous microrobots
Anrdás Búzás,Lóránd Kelemen,Anna Mathesz,László Oroszi,Gaszton Vizsnyiczai,Tamás Vicsek,l Ormos
Physics , 2012, DOI: 10.1063/1.4737646
Abstract: We introduce a system of light driven microscopic autonomous moving particles that move on a flat surface. The design is simple, yet effective: Micrometer sized objects with wedge shape are produced by photopolymerization, they are covered with a reflective surface. When the area of motion is illuminated perpendicularly from above, the light is deflected to the side by the wedge shaped objects, in the direction determined by the position and orientation of the particles. The momentum change during reflection provides the driving force for an effectively autonomous motion. The system is an efficient tool to study self propelled microscopic robots.
Short GSM mobile phone exposure does not alter human auditory brainstem response
Gábor Stefanics, Lóránd Kellényi, Ferenc Molnár, Gy?rgyi Kubinyi, Gy?rgy Thuróczy, István Hernádi
BMC Public Health , 2007, DOI: 10.1186/1471-2458-7-325
Abstract: Auditory Brainstem Response (ABR) was recorded with three non-polarizing Ag-AgCl scalp electrodes in thirty young and healthy volunteers (age 18–26 years) with normal hearing. ABR data were collected before, and immediately after a 10 minute exposure to 900 MHz pulsed electromagnetic field (EMF) emitted by a commercial Nokia 6310 mobile phone. Fifteen subjects were exposed to genuine EMF and fifteen to sham EMF in a double blind and counterbalanced order. Possible effects of irradiation was analyzed by comparing the latency of ABR waves I, III and V before and after genuine/sham EMF exposure.Paired sample t-test was conducted for statistical analysis. Results revealed no significant differences in the latency of ABR waves I, III and V before and after 10 minutes of genuine/sham EMF exposure.The present results suggest that, in our experimental conditions, a single 10 minute exposure of 900 MHz EMF emitted by a commercial mobile phone does not produce measurable immediate effects in the latency of auditory brainstem waves I, III and V.There are about 1.6 billion GSM mobile phones (MPs) in use throughout the world today. Due to the close proximity of the antenna of the mobile handset to the user's ear and head, the brain is inevitably exposed to EMFs with a relatively high specific absorption ratio (SAR). Results of experimental radiofrequency (RF) dosimetry indicate that approximately 40–55% of the mobile phone's RF output power energy is absorbed in the users head [1]. Due to the high number of MP users and the relative high SAR close to the ear, it is important to resolve whether or not EMF exposure by MPs can adversely affect the human hearing system.Numerous studies have investigated the electrophysiological effects of EMF exposure in humans. A significant delay in the latency of the fifth wave (V) of the ABR after 15 min of exposure to EMF emitted by a GSM MP was recorded [2] and the authors suggested that the observed delay might lead to a temporary 15–18 dB he
Two Level Balloon Kyphoplasty Procedure in the Treatment of Traumatic Vertebral Fractures
Sevim ?ndül,Mustafa Durmus
Journal of Clinical and Analytical Medicine , 2012, DOI: 10.4328
Abstract: Aim: Balloon Kyphoplasty procedure is among treatment options in the surgical treatment of vertebral fractures caused by trauma. Material and Method: In this clinical study, the cases treated with two level balloon kyphoplasty because of two levels vertebral compression fractures are retrospectively reviewed. Anterior, middle and posterior vertebral body heights were estimated by using preoperative and postoperative radiological images in the values of percentage changes and millimeters estimation. Result: Percentage changes were estimated at 26.5 18.1 in preoperative and postoperative measurements of anterior vertebral region. The changes were estimated at 51.7 44.2 in preoperative and postoperative measurements of middle vertebral region. The changes were estimated at 21.2 12 in measurements of posterior vertebral region. No complication encountered related with procedure. Discussion: In conclusion, this procedure seems a safe procedure with strong biomechanical properties and low complication rate in the surgical treatment of two level traumatic vertebral fractures.
Histopathological Evaluation of Beh?et's Disease and Identification of New Skin Lesions
?zgürndüz
Pathology Research International , 2012, DOI: 10.1155/2012/209316
Abstract: Beh?et's disease (BD) is a multisystemic, relapsing inflammatory disorder with an obscure etiology and pathogenesis. Diagnosis depends on the clinician's ability to identify a group of nonspecific mucocutaneous lesions, which also manifest in a number of other diseases. In recent years, there has been an increase in the studies focusing on the histopathological aspects of Beh?et's disease diagnostic mucocutaneous lesions. Their results emphasize the value of histopathology and direct immunofluorescence (DIF) in the differential diagnosis of Beh?et's disease. 1. Introduction After seventy-four years, since Dr. Hulusi Beh?et had published his classic paper describing the three major signs [1], BD are still an enigma for clinicians and researchers. Almost all aspects of BD is a source of debate and even its diagnostic criteria, classification, and pathogenesis are controversial [2–4]. In the last two decades, extensive studies have been conducted to reveal the nature of BD. In the light of these studies, BD is now recognized as a chronic, multisystemic vasculitis [2, 5–7]. Whether this vasculitis is a result of autoimmunity is controversial [2, 3], but there is increasing evidence indicating the possible role of immunologic mechanisms in the pathogenesis. Evaluation of lesion-free skin and mucocutaneous lesions of patients with BD patients by DIF reveals immunoreactant deposits on the vessel walls [8–11]. Also, elevated serum levels of several proinflammatory cytokines (IL-1, IL-4, IL-6, TNF-α, etc.) have been reported in these patients [12]. A special subgroup of T lymphocytes (γδ T lymphocytes), which play an important role in mucosal immunity, are found to be present in the increased numbers in circulation and mucosal lesions of patients [13]. Several research groups found out that cultured γδ T lymphocyte cells proliferate when stimulated with mycobacterial heat shock proteins and products of several oral pathogen microorganisms [13, 14]. Correlation between the hyperactive state of neutrophils and BD activity is another well-known fact. The underlying mechanism is unknown. Antigen-presenting cell and T-lymphocyte-derived cytokines and chemokines are believed to be responsible for neutrophiles hyperreactivitiy [15]. BD is mostly encountered in the Mediterranean and Middle and Far East countries, Turkey having the highest prevalence with 80–420?cases/100.000 [3, 16]. Genetic studies show statistically significant association with HLA-B51 [17, 18]. Antiendothelial antigens are another immunological anomaly found in BD patients, but there is no solid
第1页/共387447条
每页显示


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.