1,475 research outputs found
Caratterizzazione acustica della Sala Sinopoli nell’ Auditorium Parco della Musica di Roma
No full textSOPRANOISE: toward a quick measurement method to verify and monitor the acoustic performance of noise barriers on site
No full textThe European standards EN 1793-5 and EN 1793-6 allow measurements of sound absorption/reflection and airborne sound insulation of noise barriers in-situ, an essential activity for approving noise barriers installed alongside roads. However, the EN methods require a careful application by expert users, which may limit their use to few locations. The main objective of the project SOPRANOISE (2019-2022), funded by CEDR, was the development of a new method that should be quickly applicable to a larger part of the installed noise barriers in a more manageable way. This paper presents the main results of SOPRANOISE WP4, dealing with the conception, design, and validation of such simplified quick method. It was necessary to design a completely new equipment, simpler and lighter than the one for full tests, allowing the use by normal operators after a short training. The new quick method was validated in the laboratory and under real on-site conditions, applying both the new quick method and the full EN methods on real noise barriers installed along motorways. The systematic application of the quick method allows to identify the weak points of the noise barrier and the appropriate noise barrier fields to be tested with the full EN methods
Conter de Troie et d'Alexandre, éd. L. Harf-Lancner, L. Mathey-Maille et M. Szkilnik, 2006
No full textMenegaldo Silvère. Conter de Troie et d'Alexandre, éd. L. Harf-Lancner, L. Mathey-Maille et M. Szkilnik, 2006. In: Romania, tome 127 n°507-508, 2009. pp. 532-535
The pork food chain as a root of transmission of antimicrobial resistant Escherichia coli: a farm-to-fork perspective
No full textBackground and Objectives
The pork food industry contributes to the spread of antimicrobial resistant (AMR) microorganisms through the food chain and the environment.A significant risk factor is the possible development of Multi Drug Resistance (MDR) and nonsusceptibility to last generation cephalosporins.This study focuses on the pork food chain to evaluate the risk of AMR E. coli transmission from animal to consumer with a focus on cephalosporin resistance.
Material and Methods
Sample collection was carried out in eight fattening pig farms in North Italy from 2019 to 2022. Feces, carcasses, fresh
meat and processed meat products we collected guaranteeing traceability of matrices from farm-to- fork for each animal.
coli were isolated and their ability to resist to aminoglicosides, quinolones, polymixins, glycilcyclines, sulphonamides, βlactams was evaluated with a main focus on ESBL and AmpC production. Phylogenetical analyses were performed
through Enterobacterial Repetitive Intergenic Consensus sequences and Average Nucleotide Identity to confirm possible
relations between the strains isolated from the different production phases.
Results
The most frequent resistance pattern found included β-lactams-aminoglycosides-sulphonamides defining MDR strains in
feces and carcasses, but not in pork meat products. The evaluation of β-lactams resistance highlights percentages
ranging from 7% to 12.5% in fecal, carcass, fresh meat and processed meat product isolates in a increasing order. Data
showed that the 50% of phenotypical AMR bacteria found along the pork food chain were related phylogenetically with
different identity percentages.Considering β-lactamases producing strains, in only one case bacteria were closely
genotypically similar from farm-to-fork (feces, carcasses, and fresh meat). Frequent close similarities were found in
“carcasses and fresh meat”, “carcasses and fermented product”, “feces and fresh meat” and “fresh meat and seasoned
product” isolates.
Discussion and Conclusion
In conclusion, direct transmission of AMR from farm-to-fork is a public health concern and β-lactams AMR transmitted in
only one case. Fresh meat showed a higher risk of AMR transmission than processed meat products.However, the
prudent use of antimicrobials in pig farms, the correct management of food production stages and of the environment
continue to play a strategic role in the spread of AMR microorganisms
Mineral composition of Italian salami and effect of NaCl partial replacement on compositional, physico-chemical and sensory parameters
No full textIn 2008 the European Commission developed an EU framework for dietary sodium chloride (NaCl) reduction
in order to achieve the World Health Organization recommendations for no more than 5 g/day/person. This
initiative is based on four elements: investigate the national data available on NaCl consumption and current
NaCl levels of foods, develop actions to raise public awareness, develop reformulation actions with industry/
catering, monitor and evaluate actions and reformulations. The initiative is working towards a reduction in
NaCl of 16% over 4 years against the 2008 levels and is concentrated on meat products, bread, cheese, and
ready meals.
In this context, NaCl content and mineral composition of commercial Italian salami were investigated to
provide information on their current mineral levels. Moreover, a technological intervention based on NaCl
partial replacement by other chloride salts was investigated on Cacciatore salami, a typical Italian dry
fermented sausage, as a strategy to decrease the sodium (Na) content of cured meat products. The effect of
NaCl partial replacement by KCl, MgCl2, and CaCl2 in some compositional, physicochemical, and sensory
properties of Cacciatore salami was evaluated. A 50% reduction of NaCl used for salami manufacture and its
replacement by a mixture of KCl, CaCl2, and MgCl2 allowed a 40% lowering of Na content with limited
detrimental effects on sensory attributes. Although no effects were observed on pH, water activity,
proximate, and free fatty acid composition in reduced sodium Cacciatore salami formulation compared to the
traditional one, the NaCl partial replacement induced a significant increase of lipid oxidation
Atypical Hereditary Ovalocytosis Associated With Defective Dyserythropoietic Anemia
No full textThe cases of a child and his mother affected by chronic anemia with atypical elliptocytosis are reported. When adolescent the mother underwent splenectomy, with an incomplete response. Anemia was characterized by a morphological picture of ovalocytosis associated with a significant percentage of spherocytes in the peripheral blood of the child and spiculated red cells in that of the splenectomized mother. Bone marrow aspirates of the child showed a striking erythropoietic hyperplasia with marked decrease of mature cells and dyserythropoietic features. Reticulocyte count was rather low. Ferrokinetics showed ineffective erythropoiesis. Biochemical studies on red blood cell membrane cytoskeleton showed that beta-spectrin, alpha-spectrin and protein 4.1, which are usually altered in hereditary elliptocytosis (HE), were normal in our cases. This report confirms the hypothesis of Torlontano who postulated the existence of a distinct atypical form of HE associated with ineffective and dysplastic erythropoiesis
Isotope Fingerprinting as a Backup for Modern Safety and Traceability Systems in the Animal-Derived Food Chain
Get PDFIn recent years, due to the globalization of food trade and certified agro-food products, the authenticity and traceability of food have received increasing attention. As a result, opportunities for fraudulent practices arise, highlighting the need to protect consumers from economic and health damages. In this regard, specific analytical techniques have been optimized and implemented to support the integrity of the food chain, such as those targeting different isotopes and their ratios. This review article explores the scientific progress of the last decade in the study of the isotopic identity card of food of animal origin, provides the reader with an overview of its application, and focuses on whether the combination of isotopes with other markers increases confidence and robustness in food authenticity testing. To this purpose, a total of 135 studies analyzing fish and seafood, meat, eggs, milk, and dairy products, and aiming to examine the relation between isotopic ratios and the geographical provenance, feeding regime, production method, and seasonality were reviewed. Current trends and major research achievements in the field were discussed and commented on in detail, pointing out advantages and drawbacks typically associated with this analytical approach and arguing future improvements and changes that need to be made to recognize it as a standard and validated method for fraud mitigation and safety control in the sector of food of animal origin
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