Barbara Negri
A5048172782- Particle Detector Development and Performance
- Astrophysical Phenomena and Observations
- Crop Yield and Soil Fertility
- Planetary Science and Exploration
- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Advanced X-ray and CT Imaging
- Spacecraft Design and Technology
- Advanced Semiconductor Detectors and Materials
- Astro and Planetary Science
- Radiation Detection and Scintillator Technologies
- Advanced X-ray Imaging Techniques
- Nuclear Physics and Applications
- Growth and nutrition in plants
- X-ray Spectroscopy and Fluorescence Analysis
- Ear Surgery and Otitis Media
- CCD and CMOS Imaging Sensors
- Plant nutrient uptake and metabolism
- Space Science and Extraterrestrial Life
- Solar and Space Plasma Dynamics
- Astronomical Observations and Instrumentation
- Space exploration and regulation
- Spaceflight effects on biology
- Blood Coagulation and Thrombosis Mechanisms
Agenzia Spaziale Italiana
2013-2024
National Institute for Astrophysics
2016-2024
Institute for Space Astrophysics and Planetology
2022-2024
Federal University of São João del-Rei
2014-2023
Agronomical Institute of Campinas
2023
University of Pisa
2022
University of Cagliari
2021
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
2021
Fondazione Bruno Kessler
2018
Instituto de Astrofísica de Andalucía
2016
Metis is the first solar coronagraph designed for a space mission capable of performing simultaneous imaging off-limb corona in both visible and UV light. The observations obtained with aboard Solar Orbiter ESA-NASA observatory will enable us to diagnose, unprecedented temporal coverage spatial resolution, structures dynamics full from 1.7 $R_\odot$ about 9 $R_\odot$. Due uniqueness profile, be able observe close vantage point (down 0.28 AU), achieving out-of-ecliptic views increase orbit...
While X-ray Spectroscopy, Timing and Imaging have improved verymuch since 1962, when the first astronomical non-solar source was discovered, especially with launch of Newton/X-ray Multi-Mirror Mission, Rossi/X-ray Explorer Chandra/Advanced Astrophysics Facility, progress polarimetry has been meager. This is in part due to lack sensitive polarization detectors, fate approved missions because celestial sources appeared less polarized than expected. Only one positive measurement available until...
Abstract Low soil phosphorus (P) availability is a major constraint for crop production in tropical regions. The rice (Oryza sativa) protein kinase, PHOSPHORUS-STARVATION TOLERANCE1 (OsPSTOL1), was previously shown to enhance P acquisition and grain yield under deficiency. We investigated the role of homologs OsPSTOL1 sorghum (Sorghum bicolor) performance low P. Association mapping undertaken two association panels phenotyped uptake, root system morphology architecture hydroponics biomass...
Due to be launched in late 2021, the Imaging X-Ray Polarimetry Explorer (IXPE) is a NASA Small mission designed perform polarization measurements 2-8 keV band, complemented with imaging, spectroscopy and timing capabilities. At heart of focal plane set three polarization-sensitive Gas Pixel Detectors (GPD), each based on custom ASIC acting as charge-collecting anode. In this paper we shall review design, manufacturing, test IXPE focal-plane detectors, particular emphasis connection between...
Modifications in root morphology are important strategies to maximize soil exploitation under phosphorus starvation plants. Here, we used two multiple interval models map QTLs related traits, biomass accumulation and P content a maize RIL population cultivated nutrient solution. In addition, searched for putative homologs PSTOL1, gene responsible enhance early growth, uptake grain yield rice sorghum.
AGILE (Astrorivelatore Gamma ad Immagini LEggero) has been a unique and hugely successful mission of Italian Space Agency (ASI), built operated with the programmatic technical support National Institute for Astrophysics (INAF), Nuclear Physics (INFN), several universities industries. During almost 17 years observations in orbit (from April 23, 2007, to January 18, 2024), contributed high-energy astrophysics terrestrial physics many discoveries detections. Two co-aligned X- gamma-ray...
Because of the variable responsiveness thromboplastins to lupus anticoagulants (LA), concerns have been raised about validity prothrombin time–International Normalized Ratio (PT–INR) in monitoring oral anticoagulant treatment patients with antiphospholipid syndrome (APS) and LA. To date, few studies performed, numbers investigated are relatively small results conflicting. We report on a multicentre study organized investigate further this clinically relevant issue. Each nine thrombosis...
HERMES (High Energy Rapid Modular Ensemble of Satellites) Technological and Scientific pathfinder is a space borne mission based on LEO constellation nano-satellites. The 3U CubeSat buses host new miniaturized detectors to probe the temporal emission bright high-energy transients such as Gamma-Ray Bursts (GRBs). Fast transient localization, in field view several steradians with arcmin-level accuracy, gained by comparing time delays among same event detection epochs occurred at least 3 With...
IXPE (Imaging X-ray Polarimetry Explorer) is a NASA Small Explorer mission -- in partnership with the Italian Space Agency (ASI) dedicated to polarimetry 2--8 keV energy band. The telescope comprises three grazing incidence mirror modules coupled detector units hosting each one Gas Pixel Detector (GPD), gas that allows measuring polarization degree by using photoelectric effect. A wide and accurate ground calibration was carried out on Units (DUs) at INAF-IAPS, Italy, where facility set-up...
The beetle Anthonomus grandis Boheman, 1843, is the main cotton pest, causing enormous losses in cotton. breeding of genetically modified plants with A. resistance seen as an important control strategy. However, identification molecules high toxicity to this insect remains a challenge. susceptibility larvae proteins (Cry1Ba, Cry7Ab, and Mpp23Aa/Xpp37Aa) from Bacillus thuringiensis Berliner, 1915, reported against Coleopteran, has been evaluated. ingestion different protein concentrations...
The factor V (FV) mutation Q506 that causes resistance to activated protein C (APC) is the genetic defect associated most frequently with venous thrombosis. laboratory diagnosis can be made by DNA analysis or clotting tests measure degree of prolongation plasma time upon addition APC. Home-made and commercial methods are available but no comparative evaluation their diagnostic efficacy has so far been reported. Eighty frozen coded samples from carriers non-carriers FV:Q506 mutation,...
HERMES-TP/SP (High Energy Rapid Modular Ensemble of Satellites Technologic and Scientific Pathfinder) is a constellation six 3U nano-satellites hosting simple but innovative X-ray detectors, characterized by large energy band excellent temporal resolution, thus optimized for the monitoring Cosmic High transients such as Gamma Ray Bursts electromagnetic counterparts Gravitational Wave Events, determination their positions. The projects are funded Italian Ministry University Research Space...
Stocks of the International Reference Preparation (IRP) for thromboplastin, human, plain, coded BCT/253 and held by World Health Organization (WHO) are nearly exhausted must be replaced. For practical reasons choice replacement candidate was restricted to two available human recombinant preparations which were as X/95 Y/95 calibrated in an international collaborative study involving 19 laboratories from Europe, Australia, Canada Argentina. To minimize differences between routes calibration,...
A monoclonal antibody recognizing an epitope of the external domain human epidermal growth factor (EGF) receptor was used in alkaline phosphatase-antialkaline phosphatase (APAAP) technique to compare distribution this protein normal skin and aural cholesteatoma. EGF receptors appear be highly expressed on basal layer epidermis, hair follicle apocrine sweat glands, capillary system skin. Cholesteatoma epithelium showed increased positive reactions suprabasal layers. heterogeneity expression...
We will describe the LAUE project, supported by Italian Space Agency, whose aim is to demonstrate capability build a focusing optics in hard X-/soft gamma-ray domain (80{600 keV). To show lens feasibility, assembling of Laue petal prototype with 20 m focal length ongoing. Indeed, feasibility study, within has demonstrated that made petals feasible. Our goal 80-600 keV energy band. In addition detailed description new LARIX facility, which being assembled, we report results project obtained so far.
Italian teams have been involved many times in Space Weather observational campaigns from space and the ground, contributing advancing of our knowledge on properties evolution related phenomena. Numerous forecasting now-casting modeling efforts resulted a remarkable add-on to overall progress field, at both national international level. The Agency has participated several missions with science objectives Weather; indeed, an important field for scientific industrial communities interested...
Maximizing soil exploration through modifications of the root system is a strategy for plants to overcome phosphorus (P) deficiency. Genome-wide association with 561 tropical maize inbred lines from Embrapa and DTMA panels was undertaken morphology P acquisition traits under low- high-P concentrations, 353,540 SNPs. supply modified traits, biomass content in global panel, but length surface area changed differentially panels. This suggests that different plasticity mechanisms exist...
We report on the first results obtained from our development project of focusing gamma-rays ($>$60 keV) by using Laue lenses. The lens prototype model has been assembled and tested. describe technique adopted capabilities at about 100 keV.
Citrate concentration is one of the variables that can affect coagulation tests. However, few studies have so far been performed to assess magnitude this effect on tests in general and PT particular. The aim study was extent influence citrate test with results expressed as INR. Twelve reagent-instrument combinations (systems) were calibrated vs. Reference Preparation BCT/441 using plasmas collected either 105 mM or 129 from normals anticoagulated patients (OAT). PTs for longer than those...
The Large Area Detector (LAD) is the high-throughput, spectral-timing instrument onboard eXTP mission, a flagship mission of Chinese Academy Sciences and China National Space Administration, with large European participation coordinated by Italy Spain. currently performing its phase B study, target launch at end-2027. scientific payload includes four instruments (SFA, PFA, LAD WFM) offering unprecedented simultaneous wide-band X-ray timing polarimetry sensitivity. based on design originally...