George Angelidis

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Adiponectin, the most abundant adipose-released cytokine, has an important role in metabolism, primarily through reducing insulin resistance. Reproductive functions are known to be influenced by energy balance and adiponectin may be involved in the underlying mechanisms connecting reproduction and metabolism. Interestingly, adiponectin has been shown to(More)
Brain neoplasms constitute a group of tumors with discrete differentiation grades, and therefore, course of disease and prognosis. Magnetic resonance imaging (MRI) remains the gold standard method for the investigation of central nervous system tumors. However, MRI suffers certain limitations, especially if radiation therapy or chemotherapy has been(More)
Ghrelin is considered the endogenous ligand of growth hormone secretagogue receptor type 1a, and its modulatory actions have been demonstrated in a large array of endocrine and nonendocrine functions. According to recent studies, ghrelin seems to act at different levels of the reproductive system, exerting predominantly inhibitory effects on mammalian(More)
Ghrelin is a novel GH-releasing peptide, which has been identified as an endogenous ligand for GH-secretagogue receptor. Ghrelin is mainly secreted by the stomach and plays a critical role in a variety of physiological processes including endocrine, metabolic, cardiovascular, immunological, and other actions. Ghrelin stimulates food intake via hypothalamic(More)
Meningiomas arise from the meningothelial cells of the arachnoid membranes. They are the most common primary intracranial neoplasms and represent about 20% of all intracranial tumors. They are usually diagnosed after the third decade of life and they are more frequent in women than in men. According to the World Health Organization (WHO) criteria,(More)
In the context of the psychiatric reform, as well as of the lifelong education, a Questionnaire for the evaluation of "Satisfaction from Psychiatric Training" has been constructed. It consists of 4 subscales (Satisfaction from Materials, Trainers, Program Organization, and General Satisfaction) and a total of 19 closed-ended items, evaluated in 5-point(More)
Heart failure is a common clinical syndrome associated with significant morbidity and mortality worldwide. Ischemic heart disease is the leading cause of heart failure, at least in the industrialized countries. Proper diagnosis of the syndrome and management of patients with heart failure require anatomical and functional information obtained through(More)
OBJECTIVE Seronegative spondyloarthritis (SpA) is characterized by chronic inflammation affecting the axial skeleton, entheses and occasionally peripheral joints. The involvement of the sacroiliac joints, sacroiliitis, is considered as a pathognomonic radiographic finding. Magnetic resonance imaging (MRI) is the method of choice for its early detection.(More)
Single photon emission computed tomography (SPECT) and positron emission tomography (PET) are functional nuclear medicine techniques which allow for accurate non-invasive in vivo measurements of a wide range of regional tissue functions in man. Brain functional imaging with SPECT and PET is based on the recording of the distribution of administered(More)
This paper presents improved and new methodologies for the calculation of critical eigenvalues in the small signal stability analysis of large electric power systems. They augment the robustness and efficiency of existing methods and provide new alternatives. The procedures are implementations of Newton’s method, inverse power and Rayleigh quotient(More)