12 results on '"Papageorgiou O"'
Search Results
2. Processing and Properties of Bismuth Superconducting Phases
- Author
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Papageorgiou, O., Leventouri, T. H., Calamiotou, M., Perdikatsis, V., Kossowsky, Ram, editor, Raveau, Bernard, editor, Wohlleben, Dieter, editor, and Patapis, Stamatis K., editor
- Published
- 1992
- Full Text
- View/download PDF
3. Effect of Ca substitutions on the properties of YBa2Cu3O6+d
- Author
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Leventouri, Th. Soifer, G.A. Calamiotou, M. Papageorgiou, O. Perdikatsis, V.
- Abstract
We study the effect of Ca substitutions on the structural and superconducting properties of the system of nominal composition YCaxBa2-xCu3O6+d. The system remains superconducting up to x=1.00 and the critical temperatures vary between 92 and 80K. A new, non superconducting phase of stoichiometry Y1.14Ca1.58Cu3.27O6.45 appears with concentrations that increase with the nominal concentration of Ca. For x=0.80 and x=1.00 we observe a substitution of the Ba with Ca in crystallites of the form YBa1.8Ca0.2Cu3O6.5. © 1994.
- Published
- 1994
4. A RAMAN STUDY OF Bi-Pb-Sr-Ca-Cu-O SUPERCONDUCTORS.
- Author
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LIAROKAPIS, E., LEVENTOURI, TH., PAPAGEORGIOU, O., LU, H., and MEDINA, F.D.
- Published
- 1991
- Full Text
- View/download PDF
5. X-RAY DIFFRACTION AND ELECTRON PARAMAGNETIC RESONANCE STUDIES OF A Bi4Sr2.5Ca2.5Cu4Ox SUPERCONDUCTING PHASE
- Author
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LEVENTOURI, TH., primary, GUSKOS, N., additional, CALAMIOTOU, M., additional, PAPAGEORGIOU, O., additional, PARASKEVAS, S., additional, and PERDIKATSIS, V., additional
- Published
- 1989
- Full Text
- View/download PDF
6. Effect of Ca substitutions on the properties of YBa 2Cu 3O 6+ d
- Author
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Leventouri, Th., Soifer, G.A., Calamiotou, M., Papageorgiou, O., and Perdikatsis, V.
- Published
- 1994
- Full Text
- View/download PDF
7. National registry of hemoglobinopathies in Greece: updated demographics, current trends in affected births, and causes of mortality.
- Author
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Voskaridou E, Kattamis A, Fragodimitri C, Kourakli A, Chalkia P, Diamantidis M, Vlachaki E, Drosou M, Lafioniatis S, Maragkos K, Petropoulou F, Eftihiadis E, Economou M, Klironomos E, Koutsouka F, Nestora K, Tzoumari I, Papageorgiou O, Basileiadi A, Lafiatis I, Dimitriadou E, Kalpaka A, Kalkana C, Xanthopoulidis G, Adamopoulos I, Kaiafas P, Mpitzioni A, Goula A, Kontonis I, Alepi C, Anastasiadis A, Papadopoulou M, Maili P, Dionisopoulou D, Tsirka A, Makis A, Kostaridou S, Politou M, and Papassotiriou I
- Subjects
- Adolescent, Adult, Aged, Aged, 80 and over, Child, Child, Preschool, Female, Greece epidemiology, Heart Diseases blood, Heart Diseases epidemiology, Heart Diseases etiology, Hemoglobinopathies complications, Hemoglobinopathies metabolism, Humans, Infant, Iron metabolism, Iron Overload blood, Iron Overload epidemiology, Iron Overload etiology, Liver metabolism, Liver Diseases blood, Liver Diseases epidemiology, Liver Diseases etiology, Male, Middle Aged, Hemoglobinopathies epidemiology, Registries
- Abstract
National registries constitute an invaluable source of information and contribute to the improvement of hemoglobinopathy management. Herein, we present the second updated report of the National Registry for Haemoglobinopathies in Greece (NRHG) and critically discuss the time trends in demographics, affected births, and causes of mortality. Thirty-eight Greek hemoglobinopathy units reported data from diagnosis to the last follow-up or death by retrospectively completing an electronic form. Four thousand thirty-two patients were eligible for inclusion; more than half of them had thalassaemia major. Compared to the previous report, a reduction in the total number of all hemoglobinopathies except for hemoglobinopathy "Η" was evident. The total number of affected births was also reduced; most of them were attributable to diagnostic errors and lack of awareness. Importantly, data on iron overload are reported for the first time; although most patients had low or moderate liver iron concentration (LIC) values, a non-negligible proportion of patients had high LIC. The burden due to heart iron overload was less prominent. Cardiac- and liver-related complications are the major causes of morbidity and mortality. From 2000 to 2015, a decrease in heart-related deaths along with an increase in liver-associated fatalities was observed. The Hellenic Prevention Program along with advances in chelation regimens and iron status monitoring have resulted in improved patient outcomes. The NRHG gives insight into the effectiveness of prevention programs, the therapeutic management of hemoglobinopathies and associated outcomes. NRHG may contribute to the formulation of a roadmap for hemoglobinopathies in Europe and promote the implementation of effective public health policies.
- Published
- 2019
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- View/download PDF
8. A national registry of haemoglobinopathies in Greece: deducted demographics, trends in mortality and affected births.
- Author
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Voskaridou E, Ladis V, Kattamis A, Hassapopoulou E, Economou M, Kourakli A, Maragkos K, Kontogianni K, Lafioniatis S, Vrettou E, Koutsouka F, Papadakis A, Mihos A, Eftihiadis E, Farmaki K, Papageorgiou O, Tapaki G, Maili P, Theohari M, Drosou M, Kartasis Z, Aggelaki M, Basileiadi A, Adamopoulos I, Lafiatis I, Galanopoulos A, Xanthopoulidis G, Dimitriadou E, Mprimi A, Stamatopoulou M, Haile ED, Tsironi M, Anastasiadis A, Kalmanti M, Papadopoulou M, Panori E, Dimoxenou P, Tsirka A, Georgakopoulos D, Drandrakis P, Dionisopoulou D, Ntalamaga A, Davros I, and Karagiorga M
- Subjects
- Abortion, Eugenic psychology, Abortion, Eugenic statistics & numerical data, Anemia, Sickle Cell economics, Anemia, Sickle Cell epidemiology, Anemia, Sickle Cell prevention & control, Cause of Death, Emigrants and Immigrants statistics & numerical data, Fertilization in Vitro, Genetic Counseling, Genetic Testing, Greece, Hemoglobinopathies economics, Hemoglobinopathies mortality, Hemoglobinopathies prevention & control, Humans, Incidence, Infant, Newborn, Patient Education as Topic, Prenatal Diagnosis, Socioeconomic Factors, Thalassemia economics, Thalassemia epidemiology, Thalassemia prevention & control, Hemoglobinopathies epidemiology, Registries
- Abstract
Haemoglobinopathies are the most common hereditary disorders in Greece. Although there is a successful national prevention program, established 35 years ago, there is lack of an official registry and collection of epidemiological data for haemoglobinopathies. This paper reports the results of the first National Registry for Haemoglobinopathies in Greece (NRHG), recently organized by the Greek Society of Haematology. NRHG records all patients affected by thalassaemia major (TM), thalassaemia intermedia (TI), "H" Haemoglobinopathy (HH) and sickle cell disease (SCD). Moreover, data about the annual rate of new affected births along with deaths, between 2000 and 2010, are reported. A total of 4,506 patients are registered all over the country while the number of affected newborns was significantly decreased during the last 3 years. Main causes for still having affected births are: (1) lack of medical care due to financial reasons or low educational level; (2) unawareness of time limitations for prenatal diagnosis (PD); due either to obstetricians' malpractice or to delayed demand of medical care of couples at risk; and (3) religious, social or bioethical reasons. Cardiac and liver disorders consist main causes for deaths while life expectancy of patients lengthened after 2005 (p < 0.01). The NRHG of patients affected by haemoglobinopathies in Greece provides useful data about the haemoglobinopathies in the Greek population and confirms the efficacy of the National Thalassaemia Prevention Program on impressively decreasing the incidence of TM and sickle cell syndromes.
- Published
- 2012
- Full Text
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9. Clinical prognostic markers in patients with severe sepsis: a prospective analysis of 139 consecutive cases.
- Author
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Gogos CA, Lekkou A, Papageorgiou O, Siagris D, Skoutelis A, and Bassaris HP
- Subjects
- Aged, Chi-Square Distribution, Female, Greece epidemiology, Hospital Mortality, Humans, Logistic Models, Male, Predictive Value of Tests, Prognosis, Prospective Studies, Risk Factors, Sepsis mortality, Biomarkers analysis, Sepsis complications
- Abstract
Objectives: To analyze the clinical characteristics and determine predictive factors of mortality in previously healthy individuals suffering from severe sepsis., Methods: The study included 139 patients with severe sepsis, admitted to the Department of Medicine over a two years period. Data recorded on admission included demographic information, blood pressure, core temperature, white blood count, hepatic and renal function tests, coagulation factors, blood gases, serum lactic acid levels, simplified acute physiology score (SAPS-II) and Glasgow Coma Scale (GCS)., Results: On admission, 62 patients were hypotensive, 52 had signs of diffuse intravascular coagulation (DIC), 72 had renal and 27 hepatic dysfunction. The overall mortality rate was 27.3%. Twenty-nine patients had septic shock on admission with a mortality rate of 62.07%. Hypoxemia, metabolic acidosis and the presence of DIC were more frequent in non-survivors, who also had significantly higher SAPS-II on admission and days 3 and 7. Independent factors associated with mortality were older age, septic shock, DIC and acute renal failure on admission, as well as SAPS-II at all time points and lactic acid levels on day 7., Conclusions: Septic patients with advanced age, septic shock, renal failure, DIC and metabolic acidosis on admission are at increased risk of mortality. The sustained presence of high SAPS-II and lactacidemia one week after admission are also important risk factors of poor outcome.
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- 2003
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10. Scoliosis in beta thalassemia.
- Author
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Papageorgiou O, Papanastasiou DA, Beratis NG, Korovessis P, and Oikonomopoulos A
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- Age Determination by Skeleton, Blood Transfusion, Child, Deferoxamine therapeutic use, Female, Ferritins blood, Humans, Male, Scoliosis diagnosis, Sexual Maturation, Splenectomy, Thalassemia therapy, Scoliosis complications, Thalassemia complications
- Published
- 1991
11. Hepatitis B in household contacts of children with beta-thalassemia.
- Author
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Papanastasiou DA, Spiliopoulou IT, Papageorgiou OG, and Beratis NG
- Subjects
- Adolescent, Adult, Biomarkers blood, Child, Child, Preschool, Female, Greece epidemiology, Hepatitis B epidemiology, Hepatitis B prevention & control, Hepatitis B Antibodies blood, Hepatitis B Core Antigens immunology, Hepatitis B Surface Antigens immunology, Hepatitis B e Antigens immunology, Humans, Male, Middle Aged, Prevalence, Seroepidemiologic Studies, Thalassemia immunology, Viral Hepatitis Vaccines immunology, Hepatitis B transmission, Thalassemia complications
- Abstract
The hepatitis B virus (HBV) markers have been studied in 184 household contacts of 110 thalassemic patients and 184 normal individuals matched for age and socioeconomic status with the study subjects. The mean age (+/- SD) in both patients and control subjects was 31.1 +/- 13.5 years. HBV infection had occurred in 51.6% of the household contacts and in 32.1% of the control subjects. This difference is highly significant (p less than 0.001). The most frequent marker observed was the antihepatitis B core IgG followed by the antihepatitis B surface antibody. It is noteworthy that none of the thalassemic patients infected in the past was seropositive for the hepatitis B surface antigen at the time of the study, whereas its frequency in the general population was 8.1%. The findings indicate that the household contacts of thalassemic patients have a greater seroprevalence for hepatitis B infection. Furthermore, the household contacts of thalassemic patients are infected at a younger age than the control population. The high infection rate with HBV in all groups tested suggests that vaccination should be considered not only for the household contacts of thalassemic patients but possibly for the entire Greek population.
- Published
- 1990
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12. Ocular abnormalities in patients with beta thalassemia.
- Author
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Gartaganis S, Ismiridis K, Papageorgiou O, Beratis NG, and Papanastasiou D
- Subjects
- Adolescent, Adult, Angioid Streaks etiology, Cataract etiology, Child, Eye Diseases pathology, Eye Diseases physiopathology, Female, Fluorescein Angiography, Homozygote, Humans, Male, Pigment Epithelium of Eye pathology, Random Allocation, Retinal Vessels pathology, Thalassemia physiopathology, Eye Diseases etiology, Thalassemia complications
- Abstract
We examined 29 patients with homozygous beta thalassemia. The mean age of the patients was 15.6 +/- 8.9 years. Twelve patients (mean age, 02.0 +/- 10.4 years) had one or more ocular abnormalities. Five patients had degeneration of the retinal pigment epithelium, one had lens opacities, two had lens opacities and degeneration of the retinal pigment epithelium, one had vascular abnormalities and degeneration of the retinal pigment epithelium, one had angioid streaks, lens opacities, and degeneration of the retinal pigment epithelium, and two had angioid streaks and degeneration of the retinal pigment epithelium. These abnormalities were observed in patients with both forms of beta thalassemia, major and intermedia. The frequency of the ocular abnormalities increased with age. The youngest patient with an ocular abnormality was 6 1/2 years old. There was no correlation between the abnormalities observed and the serum ferritin level, the mean hematocrit value, and the dose of deferoxamine given to the patients.
- Published
- 1989
- Full Text
- View/download PDF
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