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Search Results: 1 - 8 of 8 matches for " Pranvera JAHOLLARI "
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Elenica PJERO,Pranvera JAHOLLARI,Xhiliola AGARAJ
Scientific Annals of the Alexandru Ioan Cuza University of Iasi : Economic Sciences Series , 2011,
Abstract: This paper presents an international view of sustainable development. The paper aims to provide an analysis on the link between openness to trade and economic growth and market failure like externalities. It focuses on the globalization process as the main factor for environmental problems. Albanian economy is exposed to a global economy and after twenty long years is still behind its Balkan neighbor. Albania is making the difficult transition to a more modern open-market economy. International trade has been a major driver of global growth and prosperity over the last century. The empirical literature has taken one of two advantage points. The first one is to analyze the correlation between openness and growth in data sets that cover a large section of developing and developed countries, in the tradition of cross country growth empirics. The second one is to concentrate on country or region-level analytical case studies of economic growth. We believe that this framework will contribute to understand why certain developing countries have made progress, while others have not. Progress has been very impressive for a number of developing countries in Southeast Europe, but progress has been less rapid for other countries like Albania. As a nation we have to think about what future research opportunities exist for us. The scale and scope of future research is an issue that affects our entire society and the next generation. The government has a general role in supporting this discussion, by setting up a dialogue with the community.
Determination of Volume Conductivity of Thin Polymeric Films Using Corona Triode, When the Current through the Sample Depends Quadratically on Grid Potential  [PDF]
Pranvera Dhima, Floran Vila
Advances in Materials Physics and Chemistry (AMPC) , 2018, DOI: 10.4236/ampc.2018.86019
Abstract: In this paper is determined the volume conductivity of thin polymeric films using the corona triode method, when the current through the sample exhibits a quadratic dependence on the grid potential. Based on the experimental data, for the first time, an effective methodology for the determination of volume conductivity, graphically and analytically, is composed. The results obtained by the proposed analytical formula, for polypropylene and Trespaphan, with two different configurations of structures, are closely similar to the graphical method results. In addition, the satisfying accordance of our results, with the results, found out with the consulted literature, obtained by the “static” methods, confirms the accuracy of the proposed methodology, for the determination of volume conductivity of thin polymeric films, using the corona triode.
Effect of Polarity on Volume Conductivity of Polymers, Determined by Corona Triode Method  [PDF]
Pranvera Dhima, Floran Vila
Advances in Materials Physics and Chemistry (AMPC) , 2018, DOI: 10.4236/ampc.2018.810026
In this paper, the effect of polarity on the volume conductivity of Kapton and polyethylene (PE), determined using the corona triode method, when the sample current depends linearly on grid potential, was studied. For the determination of volume conductivity, in addition to the analytical method, for the first time, a graphical method is presented as well. According to the experimental results, obtained by both methods, the volume conductivity values of negative corona charged samples were higher than those of the samples charged by positive corona. Considering the different nature of positive and negative coronas, these differences in results are to be expected and are in full accordance with the theoretical considerations as well. On the other hand, the good agreement between the analytical method results and those obtained by the graphical method, indicates high accuracy of the proposed analytical formula. Meanwhile, the satisfying accordance of experimental results with those found by the classical “static” and “dynamic” methods, confirms the accuracy of the corona method, for the determination of volume conductivity of polymers.
Analysis of Mercurial Preservatives in Different Vaccines by Cold Vapor Atomic Absorption Spectrophotometry
Pranvera Lazo,Merita Kucuku
Journal of Analytical Science & Technology , 2012,
Abstract: Vaccines with low concentration of mercurial preservatives, such as thiomersal, are in use in Albania. A simple and a sensitive method by using CVAAS method for the determination of mercury in vaccine samples is described. This method is based on a digestion procedure that transforms organic mercury to Hg2+. Digestion is a critical step to destroy microorganism that could combine with Hg2+ and metabolize into ethyl mercury, thus preventing the mercury determination via CVAAS method. Negative chemical interferences were observed, after acid digestion of vaccine samples by obtaining low repeatability of the results. The method was improved by using heating (80℃-90℃), UV radiation and digestion with strong oxidants and acids to transform organic mercury into Hg2+ for CVAAS determination. The accuracy of the analysis was checked by recovery of the spikes which was in the range of 98-102%. The method yielded reproducible results with RSD<5.5%.
Determination of Volume Conductivity of Polyethylene Using Positive Corona, When the Current through the Sample Depends Linearly on Grid Potential  [PDF]
Pranvera Dhima, Floran Vila
Journal of Materials Science and Chemical Engineering (MSCE) , 2017, DOI: 10.4236/msce.2017.512004
Abstract: In this paper we determine for the first time the volume conductivity of polyethylene (of 40 μm and 50 μm thickness), using the positive corona triode. A general theory of flowing of the current through the sample, when it depends linearly on the grid potential, is formulated. A concrete methodology for the definition of volume conductivity is composed. The volume conductivity of polyethylene lies within the interval: \"\". These results obtained using the corona triode are closely similar to those obtained using the standardized “static” methods, thus showing its superiority to the “dynamic” method of electronic radiation.
A Case of Type I Aortic Dissection; Intravascular Fenestration Prior to Surgical Procedure
Mehmet Sahin,Artan Jahollari,Harun Tatar
Journal of Clinical and Analytical Medicine , 2011, DOI: 10.4328
Abstract: Proper clinical and radiological evaluation of aortic dissection, determination of branches being perfused by true or false lumen is necessary in constructing a correct strategy to treat this disorder. Multidisciplinary approach in experienced centers is mandatory to have satisfying results. Percutaneous fenestration of the dissection flap prior to surgery is a simple procedure that improves organ perfusion and creates a more comfortable postoperative period.
Intra-Aortic Balloon Pump Rupture and Entrapment
Artan Jahollari,Atilla Sarac,Ertugrul Ozal
Case Reports in Vascular Medicine , 2014, DOI: 10.1155/2014/378672
Abstract: Intra-aortic balloon pump is used frequently to support a failing myocardium in cardiac patients. Due to the invasive nature of this device, usage is accompanied by consistent risk of complications. Balloon rupture, although it occurs rarely, may lead to entrapment if diagnosis delays. A 78-year male who underwent cardiac surgery experienced balloon rupture and entrapment in the right femoral artery during the postoperative follow-up. Surgical extraction under local anesthesia was performed and the patient had an uneventful course. Fast and gentle solution of the problem is necessary to prevent further morbidity or mortality related to a retained balloon catheter in these delicate patients. 1. Introduction Intra-aortic balloon pump (IABP) counterpulsation is a very helpful tool in management of critic cardiac patients, both in cardiology and cardiovascular surgery units. It was first introduced by Kantrowitz et al. in 1967, and ever since its indications have significantly increased [1]. During decades, catheters have become easy to insert or extract, and the device itself can be simply controlled by even nonsenior health workers. However, despite all the technological progress that has been made, there is still a high rate of complications regarding IABP usage. Most of them include vascular complications such as limb ischemia, thromboembolism, visceral ischemia, and spinal cord injury [1]. Balloon rupture and entrapment are a rarely seen complication. There is limited literature regarding this topic, mostly in the form of case reports. We present a case where the balloon ruptured and was entrapped in femoral artery during extraction, which was solved surgically. 2. Case Report A 78-year old male, who had had a previously left internal mammarian artery (LIMA) and left anterior descending artery (LAD) bypass before 10 years, presented with angina pectoris and resting dyspnea. He also suffered from diabetes, obesity, and chronic obstructive lung disease. Echocardiography revealed dilated left heart chambers, ejection fraction of 30%, mild mitral regurgitation, and elevated pulmonary pressure. Coronary artery angiography demonstrated 80% stenosis of left main coronary artery, severe lesions of LAD and circumflex artery (Cx), total occlusion of LIMA, and noncritical lesions of right coronary artery. The patient underwent a double vessel off-pump coronary artery bypass grafting with saphenous grafts to LAD and Cx. Due to significant symptomatic status and poor coronary artery quality, preoperative IABP of 7.5?F and 40?cc size was inserted. Catheter was
Is there any cardioprotective role of Taurine during cold ischemic period following global myocardial ischemia?
Mehmet A Sahin, Orhan Yucel, Adem Guler, Suat Doganci, Artan Jahollari, Faruk Cingoz, S?dd?k Arslan, Mehmet Gamsizkan, Halil Yaman, Ufuk Demirkilic
Journal of Cardiothoracic Surgery , 2011, DOI: 10.1186/1749-8090-6-31
Abstract: 32 rats were divided into four groups (sham, taurine, ischemia, treatment group, 8 rats in each). All rats were fed with rat food for three weeks. Taurine and treatment groups were given a 200 mg/kg/day dose of Taurine by oral gavage besides rat feed. Cardiectomy was performed in all rats after three weeks. In ischemia and treatment groups, harvested hearts were kept in 0.9% sodium chloride at +4 degrees C for 5 hours. Tissue samples were taken from left ventricle in all groups. These samples were evaluated by histopathologic and biochemical examination.In the present study results of the biochemical and histopathological examination reveals the protective effects of Taurine. As a marker of lipid peroxidation, Malondialdehyde (MDA) levels in ischemia group were significantly higher than both Sham and Taurine groups. MDA values were recorded; 3.62 ± 0.197 in the sham group, 2.07 ± 0.751 in the Taurine group, 9.71 ± 1.439 in the ischemia group and 7.68 ± 1.365 in the treatment group. MDA levels decreased in treatment group. (p < 0.05) In accordance with MDA findings, while superoxide dismutase and glutathione peroxidase levels decreased in ischemia group, they increased in treatment group. (p < 0.05) There was no differences in Catalase (CAT) enzyme level between treatment and ischemia group (p = 1.000). CAT level results were recorded; 7.08 ± 0.609 in the sham group, 6.15 ± 0.119 in the Taurine group, 5.02 ± 0.62 in the ischemia group, and 5.36 ± 0.384 in the treatment group. Less intracellular edema and inflammatory cell reaction were observed in histologic examination in favor of treatment group. (p < 0.01)Taurine decreased myocardial damage during cold ischemic period following global myocardial ischemia.Maintaining cardiac functions in explanted hearts within ischemic time needs good preservation. Hypoxic, hypothermic, cardioplegic arrest followed by cold transport is a common procedure for preservation of explanted hearts. This procedure is the main practical me
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