Search results for "PV"

Cryopreservation of white mulberry (Morus alba L.) by encapsulation-dehydration and vitrification

2011

Shoot apices of in vitro-grown plantlets of white mulberry, Morus alba L. cv Florio, were cryopreserved using either encapsulation-dehydration or vitrification. For encapsulation-dehydration, alginate beads containing apices were dehydrated for 1, 3, 5 or 7 days in a liquid medium containing various sucrose concentrations (0.5, 0.75, 1.0 or 1.25 M). Bead desiccation was performed using silica gel for either 0, 4, 6, 8, 9 or 14 h. For vitrification, apices were directly immersed for either 5, 15, 30 or 60 min in a vitrification solution (PVS2). Following encapsulation-dehydration, treatment of alginate beads with 0.75 M sucrose was more effective in promoting re-growth of explants after imme…

Application of Thermographic Techniques for the Detection of Failures on Photovoltaic Modules

2019

The paper focuses on thermography as a useful investigation tool for diagnosis, detection and prevention of failures of photovoltaic modules. The paper describes the faults detectable by thermographic investigations and how to conduct these investigantions. Then the results of some analyses conducted on a photovoltaic field are presented. The investigations made possible to identify faulty modules with hot spots by measuring localized superheat due to the presence of concentrated deposits on the exposed surface of the module and the superheating due to the presence of sand/dust deposits distributed on a significant portion of the module surface. The thermographic investigations can be used …

An analysis of feed’in tariffs for solar PV in six representative countries of the European Union

2014

Abstract In this paper, after a brief review on the main support policies for Photovoltaic (PV) systems in Europe, the specific situations of six representative countries (France, Germany, Greece, Italy, Spain and the U.K.) are examined, with the purpose of highlighting the main differences in the implementation of the feed’in tariff (FiT) support policies adopted for PV systems. In particular, a comparison based on the calculation of economic indexes, as the Discounted Cash Flows (DCF), the Pay-Back-Period (PBP), the Net Present Value (NPV) and the Internal Rate of Return (IRR), for different sized PV systems shows that a specific FiT can sometimes be inconvenient for the producer and that…

Comparative analysis of different supporting measures for the production of electrical energy by solar PV and Wind systems: Four representative Europ…

2009

Abstract In the 9th of March 2007, the European Council decided a fixing goal of 20% contribution of the renewable energy sources (RES) on the total European electric energy production in 2020. In order to reach such an ambitious goal, all the European countries are adopting different support policies for encouraging the installations of RES-based generation systems. In this paper, after a brief review on the main support policies for RES in Europe, the specific situations of four representative countries (France, Germany, Italy and Spain) are examined, with the purpose of putting into evidence the main differences in the support policies adopted for Photovoltaic (PV) and Wind systems. In p…

Feed-in Tariffs for Grid-connected PV Systems: The Situation in the European Community

2007

Distributed generation demonstrates to be able to significantly influence the electric power system bringing considerable benefits to the quality of service and improving the energetic efficiency of the distribution network. In particular, in the last few years, distributed generation from renewable sources is considerably increased thanks to the many support policies promoted worldwide with the aim of facing the environmental issue and the problem of the permanent rise of prices of the fossil energy. In this contest the paper presents a study of the "feed-in tariffs" financing measure carried out, at present, in many European countries and responsible of the increase in these last years of…

Can Predictive Vegetation Modeling be a useful tool to support Vegetation Classification?

2014

TRPV1 channels as putative targets in the cannabinoid-mediated synaptic activity of hippocampal neurons

Endocannabinoids (eCBs) play a critical part in pathophysiological conditions rooted on neuronal excitability such as epilepsy. eCBs seem to be involved in neuroprotection, putatively acting on the cannabinoid receptor type 1 (CB1r), but also on Transient Receptor Potential Vanilloid type 1 channels (TRPV1). Indeed, CB1r and TRPV1 are involved in the transduction of stimuli at synaptic level, though exact molecular mechanisms are far from being unveiled. Thus, we aimed to investigate the role of CB1r/TRPV1 interplay in the rat hippocampal neurotransmission by whole-cell patch clamp technique to evaluate excitatory bioelectric activity in the CA1. We pharmacologically manipulated this pathwa…

ROLE OF NITRIC OXIDE/cGMP PATHWAY IN CANNABINOID MODULATION OF PAROXYSMAL PHENOMENA

Phenotypic spectrum and incidence of TRPV4 mutations in patients with inherited axonal neuropathy.

2014

Objective: To clarify the phenotypic spectrum and incidence of TRPV4 mutations in patients with inherited axonal neuropathies. Methods: We screened for TRPV4 mutations in 169 French unrelated patients with inherited axonal peripheral neuropathy. Ninety-five patients had dominant Charcot-Marie-Tooth type 2 (CMT2) disease, and 74 patients, including 39 patients with distal hereditary motor neuropathy, 14 with congenital spinal muscular atrophy and arthrogryposis, 13 with CMT2, and 8 with scapuloperoneal spinal muscular atrophy, presented with additional vocal cord paralysis and/or skeletal dysplasia. Results: No deleterious TRPV4 mutation was identified in the 95 patients with “pure” CMT2 (0/…

Solar photovoltaic‑based microgrid hosting capacity evaluation in electrical energy distribution network with voltage quality analysis

2021

Abstract In this paper, solar photovoltaic hosting capacity within the electrical distribution network is estimated for different buses, and the impacts of high PV penetration are evaluated using power hardware-in-loop testing methods. It is observed that the considered operational constraints (i.e. voltage and loadings) and their operational limits have a significant impact on the hosting capacity results. However, with increasing photovoltaic penetration, some of the network buses reach maximum hosting capacity, which affects the network operation (e.g. bus voltages, line loading). The results show that even distributing the maximum hosting capacity among different buses can increase the…