1,137 research outputs found
Nuevos registros de Selysiothemis nigra (Vander Linden, 1825) y Erythromma viridulum (Charpentier, 1840) de la isla de Cefalonia (Grecia) con una lista actualizada de la odonatofauna de la isla
Selysiothemis nigra (Vander Linden, 1825) and Erythromma viridulum (Charpentier, 1840) are recorded from the Greek island of Cephalonia for the first time, on the basis of photographic data. With the present note we also give an updated checklist of the odonatofauna for the island.Selysiothemis nigra (Vander Linden, 1825) y Erythromma viridulum (Charpentier, 1840) se citan en la isla griega de Cefalonia por primera vez, sobre la base de datos fotográficos. Con la presente nota también se proporciona una lista actualizada de la odonatofauna de la isla
Myeloperoxidase: A New Biomarker of Inflammation in Ischemic Heart Disease and Acute Coronary Syndromes
Myeloperoxidase (MPO) is an enzyme stored in azurophilic granules of polymorphonuclear neutrophils and macrophages and released into extracellular fluid in the setting of inflammatory process. The observation that myeloperoxidase is involved in oxidative stress and inflammation has been a leading factor to study myeloperoxidase as a possible marker of plaque instability and a useful clinical tool in the evaluation of patients with coronary heart disease. The purpose of this review is to provide an overview of the pathophysiological, analytical, and clinical characteristics of MPO and to summarize the state of art about the possible clinical use of MPO as a marker for diagnosis and risk stratification of patients with acute coronary syndrome (ACS)
Experimental Characterization of Ionic Polymer Metal Composite as a Novel Fractional Order Element
Ionic polymer metal composites (IPMCs) are electroactive materials made of ionic polymer thin membranes with platinum metallization on their surfaces. They are interesting materials due to not only their electromechanical applications as transducers but also to their electrochemical features and the relationship between the ionic/solvent current and the potential field. Their electrochemical properties thus suggest the possibility for exploiting them as compact fractional-order elements (FOEs) with a view of defining fabrication processes and production strategies that assure the desired performances. In this paper, the experimental electrical characterization of a brand new IPMC setup in a fixed sandwich configuration is proposed. Two IPMC devices with different platinum absorption times (5 h and 20 h) are characterized through experimental data: first, a preliminary linearity study is performed for a fixed input voltage amplitude in order to determine the frequency region where IPMC can be approximated as linear; then, a frequency analysis is carried out in order to identify a coherent fractional-order dynamics in the bode diagrams. Such analyses take the first steps towards a simplified model of IPMC as a compact electronic FOE for which the fractional exponent value depends on fabrication parameters as the absorption time
Il right to the truth:un nuovo diritto emergente nel diritto internazionale?
The right to the truth, i.e. the right of victims of gross violations and of their families as well as of the society as a whole to know the full and complete truth about the circumstances surrounding serious violations, has emerged as a key priority in the agenda of United Nations and of regional Organizations. In this context, the right to the truth is commonly understood as a general principle of international human rights law and, specifically, as an autonomous, independent and inalienable right. However, international practice and jurisprudence (Inter-American Court of Human Rights and European Court of Human Rights) hardly support this conclusion as well as the existence of a right to the truth in customary international law.
This paper aims at demonstrating that the “right to the truth” does not seem to be conceived as a right strictu sensu in international human rights law but rather as an emphatic formula gathering other fundamental right
FT-IR Spectral Signature of Sensitive and Multidrug-Resistant Osteosarcoma Cell-Derived Extracellular Nanovesicles
Osteosarcoma (OS) is the most common primary bone cancer in children and adolescents. Despite aggressive treatment regimens, the outcome is unsatisfactory, and multidrug resistance (MDR) is a pivotal process in OS treatment failure. OS-derived extracellular vesicles (EVs) promote drug resistance to chemotherapy and target therapy through different mechanisms. The aim of this study was to identify subpopulations of osteosarcoma-EVs by Fourier transform infrared spectroscopy (FT-IR) to define a specific spectral signature for sensitive and multidrug-resistant OS-derived EVs. EVs were isolated from sensitive and MDR OS cells as well as from mesenchymal stem cells by differential centrifugation and ultracentrifugation. EVs size, morphology and protein expression were characterized. FT-IR/ATR of EVs spectra were acquired in the region of 400-4000 cm(-1) (resolution 4 cm(-1), 128 scans). The FT-IR spectra obtained were consistently different in the EVs compared to cells from which they originate. A specific spectral signature, characterized by a shift and a new band (1601 cm(-1)), permitted to clearly distinguish EVs isolated by sensitive and multidrug-resistant OS cells. Our data suggest that FT-IR spectroscopy allows to characterize and define a specific spectral signature for sensitive and MDR OS-derived EVs
An Environmentally Friendly Practice Used in Olive Cultivation Capable of Increasing Commercial Interest in Waste Products from Oil Processing
In the Rural Development Plan (2014–2020), the European Commission encouraged the
conversion and supported the maintenance of organic farming. Organic olive oil (bioEVOO)
production involves the use of environmentally sustainable fertilizers and the recycling of olive
pomace (Pom) and olive vegetation waters (VW) to reduce the environmental impact of these
wastes. An ecofriendly way to recycle olive wastes is to reuse them to extract bioactive compounds.
In this study, the total phenolic compounds content, their profile and dosage, the antioxidant action
in oil, pomace, and vegetation water was evaluated when the Trichoderma harzianum M10 was used
as a biostimulant in agriculture. Two spectrophotometric tests (2,2‐diphenyl‐1‐picrylhydrazyl
(DPPH) and 2,2′‐azinobis (3‐ethylbenzothiazoline‐6‐sulfonic) acid (ABTS)) evaluated the
antioxidant potential of samples, a spectrophotometric method estimated total phenolic content,
and an Ultra‐High‐Performance Liquid Chromatography (UHPLC)–Orbitrap method evaluated the
phenolics profile. Our results showed that the biostimulation improved the antioxidant potential
and the total concentration of phenolics in the bioEVOO and bio‐pomace (bioPom) samples and
mainly enhanced, among all classes of phenolic compounds, the production of the flavonoids and
the secoiridoids. Moreover, they demonstrated the Trichoderma action in the mevalonate pathway
to produce phenols for the first time. The decisive action of the Thricoderma on the production of
phenolic compounds increases the economic value of the waste materials as a source of bioactive
compounds useful for the pharmaceutical, cosmetic, and food industries
Anderson-Fabry’s Disease: A Rare but Treatable Case of Fever of Unknown Origin
Anderson-Fabry’s disease (AFD) is a rare, X-linked lysosomal storage disorder caused by the complete deficiency or attenuated activity of the enzyme α-galactosidase A, leading to progressive systemic intracellular accumulation of glycosphingolipids and subsequent cellular dysfunction, inflammation and fibrosis. Fever is a frequently misinterpreted symptom in the early stages of the disease, leading to diagnostic delay. We present the case of a 35-year-old man admitted to our Periodic Fever Research Centre for long-lasting recurrent episodes of fever of unknown origin. After extensive assessment, we diagnosed AFD associated with a novel GLA mutation. We started enzyme replacement therapy with clinical benefit and complete remission of fever
- …