Localizzazione inusuale di cisti del dotto tireoglosso

nglish version Summary: An unusual localization of thyroglossal duct cyst. M. Barbaro, A. Di Mario, D. De Seta, G. Rispoli, E. Covelli, G.A. Bertoli, A. Minni Thyroglossal duct cysts are most common neck masses after benign lymphonodes. They originate from primitive thiroglossal duct, so they could be locate along its course. Every mass in the middle line of the neck can be considerated as a thyroglossal cyst. Best treatment is surgery (Sistrunk procedure). We present a case of unusual localization at floor of the mouth of thyroglossal in a 34 years old woman. To our knowledge in literature, only two cases, have been reported both

An acoustical survey about the Sanctuary of Altavilla Milicia (Palermo)

This study aims at using the science and the technique, known nowadays, at the service of the Liturgy and of the holy architecture. In addition to this, its second goal is to investigate completely, on some general acoustic aspects that can be founded inside liturgical rooms, without overlooking the historical-architectural aspects regarding the difference "kinds" of manufactures and materials in relation to the specific liturgical needs. According to this, an interesting simulation of sound diffusion inside the Sanctuario of Altavilla Milicia, defined by the Cardinal S. De Giorgi "the first and most notorious Marian place of veneration belonging to the Church of Palermo", was performed. By means of this simulation, the acoustic parameters of the ecclesial room were taken, in compliance to the standards UNI EN ISO 3382/1997 (Measurements of enclosed environments Reverberation Time with reference to other acoustic parameters)

Fast Liquid Chromatography Coupled with Tandem Mass Spectrometry for the Analysis of Vanillic and Syringic Acids in Ice Cores

The development of new analytical systems and the improvement of the existing ones to obtain high-resolution measurements of chemical markers in samples from ice cores, is one of the main challenges the paleoclimatic scientific community is facing. Different chemical species can be used as markers for tracking emission sources or specific environmental processes. Although some markers, such as methane sulfonic acid (a proxy of marine productivity), are commonly used, there is a lack of data on other organic tracers in ice cores, making their continuous analysis analytically challenging. Here, we present an innovative combination of fast liquid chromatography coupled with tandem mass spectrometry (FLC-MS/MS) to continuously determine organic markers in ice cores. After specific optimization, this approach was applied to the quantification of vanillic and syringic acids, two specific markers for biomass burning. Using the validated method, detection limits of 3.6 and 4.6 pg mL–1 for vanillic and syringic acids, respectively, were achieved. Thanks to the coupling of FLC-MS/MS with the continuous flow analytical system, we obtained one measurement every 30 s, which corresponds to a sampling resolution of a sample every 1.5 cm with a melting rate of 3.0 cm min–1. To check the robustness of the method, we analyzed two parallel sticks of an alpine ice core over more than 5 h. Vanillic acid was found with concentrations in the range of picograms per milliliter, suggesting the combustion of coniferous trees, which are found throughout the Italian Alps.publishedVersio

New strontium-based coatings show activity against pathogenic bacteria in spine infection

Infections of implants and prostheses represent relevant complications associated with the implantation of biomedical devices in spine surgery. Indeed, due to the length of the surgical procedures and the need to implant invasive devices, infections have high incidence, interfere with osseointegration, and are becoming increasingly difficult to threat with common therapies due to the acquisition of antibiotic resistance genes by pathogenic bacteria. The application of metal-substituted tricalcium phosphate coatings onto the biomedical devices is a promising strategy to simultaneously prevent bacterial infections and promote osseointegration/osseoinduction. Strontium-substituted tricalcium phosphate (Sr-TCP) is known to be an encouraging formulation with osseoinductive properties, but its antimicrobial potential is still unexplored. To this end, novel Sr-TCP coatings were manufactured by Ionized Jet Deposition technology and characterized for their physiochemical and morphological properties, cytotoxicity, and bioactivity against Escherichia coli ATCC 8739 and Staphylococcus aureus ATCC 6538P human pathogenic strains. The coatings are nanostructured, as they are composed by aggregates with diameters from 90 nm up to 1 mu m, and their morphology depends significantly on the deposition time. The Sr-TCP coatings did not exhibit any cytotoxic effects on human cell lines and provided an inhibitory effect on the planktonic growth of E. coli and S. aureus strains after 8 h of incubation. Furthermore, bacterial adhesion (after 4 h of exposure) and biofilm formation (after 24 h of cell growth) were significantly reduced when the strains were cultured on Sr-TCP compared to tricalcium phosphate only coatings. On Sr-TCP coatings, E. coli and S. aureus cells lost their organization in a biofilm-like structure and showed morphological alterations due to the toxic effect of the metal. These results demonstrate the stability and anti-adhesion/antibiofilm properties of IJD-manufactured Sr-TCP coatings, which represent potential candidates for future applications to prevent prostheses infections and to promote osteointegration/osteoinduction

Caratterizzazione dimensionale dei composti solubili in acqua nella frazione ultrafine, fine e grossolana dell’aerosol urbano

Lo scopo di questo lavoro consiste nello studio della composizione chimica della frazione idrosolubile dell’aerosol atmosferico in funzione del diametro delle particelle in un’area urbana. La composizione chimica delle particelle in funzione della loro dimensione influisce notevolmente sul ruolo ambientale, tossicologico e legislativo dell’aerosol atmosferico. Per la prima volta, questo studio può fornire un utile strumento analitico ambientale per indagare la composizione della frazione ultrafine dell’aerosol urbano. Nel sito urbano di Mestre-Venezia sono stati raccolti 14 campioni di aerosol in un periodo compreso tra marzo e maggio 2016, utilizzando un impattore MOUDI II che ha permesso di suddividere l’aerosol in 12 frazioni dimensionali (>18 μm; 18-10 μm; 10-5.6 μm; 5.6-3.2 μm; 3.2- 1.8 μm; 1.8-1 μm; 1-0.56 μm; 0.56 -0.32 μm; 0.32-0.18 μm; 0.18-0.1 μm; 0.1-0.056 μm; <0.056 μm). Ciascuno dei 168 supporti campionati è stato pesato in un camera bianca ISO 7 ed estratto in acqua ultrapura con ultrasuoni. L’estratto acquoso è stato analizzato mediante IC-MS per la determinazione di specie ioniche (ioni maggiori, acido metansolfonico, acidi carbossilici) e zuccheri (alcol zuccheri, anidrozuccheri, mono- e disaccaridi) e mediante HPLC-MS/MS per la determinazione di L- e D- amminoacidi, composti fenolici, composti di degradazione dell’α-pinene. I risultati ottenuti evidenziano che le specie idrosolubili analizzate rappresentano mediamente tra il 14% ( 1 μm) sono il sodio, il calcio e il nitrato mentre la frazione fine (<1 μm) è caratterizzata da alte concentrazioni di solfato, ammonio e acidi carbossilici. Nitrato e solfato sono invece le specie caratteristiche della frazione nano (<100 nm). Per ciascuna classe di composti studiata è stata indagata la sorgente di emissione e la relativa distribuzione in funzione del diametro delle particelle. Ad esempio, lo studio di L e D-amminoacidi ha dimostrato che l’amminoacido a più alta concentrazione è la glicina, segue L-prolina, L-arginina, acido L-glutammico e D-alanina. Le alte concentrazioni della glicina, principalmente presente nella frazione fine (180 nm - 1 μm), sono legate alla stabilità del composto, mentre la L-prolina che deriva da spore si distribuisce maggiormente nella frazione grossolana. Considerato l’elevato numero di specie analizzate, è stato applicato un approccio chemiometrico che ha permesso di individuare quattro specifiche sorgenti di emissione: emissione marina primaria, emissione marina di specie secondarie, combustione di biomassa e una sorgente mista. Mentre i composti che caratterizzano la sorgente marina primaria si distribuiscono nella frazione grossolana dell’aerosol (>1 μm), i composti secondari di origine marina si distribuiscono sulle particelle più fini (<1 μm), come anche i composti specifici della combustione di biomassa

An upgraded CFA - FLC - MS/MS system for the semi-continuous detection of levoglucosan in ice cores

A new Continuous Flow Analysis (CFA) system coupled with Fast Liquid Chromatography – tandem Mass Spectrometry (FLC-MS/MS) has been recently developed for determining organic markers in ice cores. In this work we present an upgrade of this innovative technique, optimized for the detection of levoglucosan in ice cores, a crucial tracer for reconstructing past fires. The upgrade involved a specific optimization of the chromatographic and mass spectrometric parameters, allowing for a higher sampling resolution (down to 1 cm) and the simultaneous collection of discrete samples, for off-line analysis of water stable isotopes and additional chemical markers. The robustness and repeatability of the method has been tested by the analysis of multiple sticks of ice cut from the same shallow alpine ice core, and running the system for several hours on different days. The results show similar and comparable trends between the ice sticks. With this upgraded system, a higher sensitivity and a lower limit of detection (LOD) was achieved compared to discrete analysis of alpine samples for levoglucosan measurements. The new LOD was as low as 66 ng L−1, a net improvement over the previous LOD of 600 ng L−1

Geomorphology of the northwestern Kurdistan Region of Iraq: landscapes of the Zagros Mountains drained by the Tigris and Great Zab Rivers

We present the geomorphological map of the northwestern part of the Kurdistan Region of Iraq, where the landscape expresses the tectonic activity associated with the Arabia-Eurasia convergence and Neogene climate change. These processes influenced the evolution of landforms and fluvial pathways, where major rivers Tigris, Khabur, and Great Zab incise the landscape of Northeastern Mesopotamia Anticlinal ridges and syncline trough compose the Zagros orogen. The development of water and wind gaps, slope, and karsts processes in the highlands and the tilting of fluvial terraces in the flat areas are the main evidence of the relationship between tectonics, climate variations and geomorphological processes. During the Quaternary, especially after the Last Glacial Maximum, fluctuating arid and wet periods also influenced local landforms and fluvial patterns of the area. Finally, the intensified Holocene human occupation and agricultural activities during the passage to more complex societies over time impacted the evolution of the landscape in this part of Mesopotamia

New insights into irritable bowel syndrome pathophysiological mechanisms: contribution of epigenetics

Irritable bowel syndrome (IBS) is a complex multifactorial condition including alterations of the gut-brain axis, intestinal permeability, mucosal neuro-immune interactions, and microbiota imbalance. Recent advances proposed epigenetic factors as possible regulators of several mechanisms involved in IBS pathophysiology. These epigenetic factors include biomolecular mechanisms inducing chromosome-related and heritable changes in gene expression regardless of DNA coding sequence. Accordingly, altered gut microbiota may increase the production of metabolites such as sodium butyrate, a prominent inhibitor of histone deacetylases. Patients with IBS showed an increased amount of butyrate-producing microbial phila as well as an altered profile of methylated genes and micro-RNAs (miRNAs). Importantly, gene acetylation as well as specific miRNA profiles are involved in different IBS mechanisms and may be applied for future diagnostic purposes, especially to detect increased gut permeability and visceromotor dysfunctions. In this review, we summarize current knowledge of the role of epigenetics in IBS pathophysiology

An upgraded CFA-FLC-MS/MS system for the semi-continuous detection of levoglucosan in ice cores

A new Continuous Flow Analysis (CFA) system coupled with Fast Liquid Chromatography - tandem Mass Spectrometry (FLC-MS/MS) has been recently developed for determining organic markers in ice cores. In this work we present an upgrade of this innovative technique, optimized for the detection of levoglucosan in ice cores, a crucial tracer for reconstructing past fires. The upgrade involved a specific optimization of the chro-matographic and mass spectrometric parameters, allowing for a higher sampling resolution (down to 1 cm) and the simultaneous collection of discrete samples, for off-line analysis of water stable isotopes and additional chemical markers. The robustness and repeatability of the method has been tested by the analysis of multiple sticks of ice cut from the same shallow alpine ice core, and running the system for several hours on different days. The results show similar and comparable trends between the ice sticks. With this upgraded system, a higher sensitivity and a lower limit of detection (LOD) was achieved compared to discrete analysis of alpine samples for levoglucosan measurements. The new LOD was as low as 66 ng L-1, a net improvement over the previous LOD of 600 ng L-1

Minimally-invasive treatments for benign thyroid nodules: a Delphi-based consensus statement from the Italian minimally-invasive treatments of the thyroid (MITT) group

Benign thyroid nodules are a common clinical occurrence and usually do not require treatment unless symptomatic. During the last years, ultrasound-guided minimally invasive treatments (MIT) gained an increasing role in the management of nodules causing local symptoms. In February 2018, the Italian MIT Thyroid Group was founded to create a permanent cooperation between Italian and international physicians dedicated to clinical research and assistance on MIT for thyroid nodules. The group drafted this list of statements based on literature review and consensus opinion of interdisciplinary experts to facilitate the diffusion and the appropriate use of MIT of thyroid nodules in clinical practice. (#1) Predominantly cystic/cystic symptomatic nodules should first undergo US-guided aspiration; ethanol injection should be performed if relapsing (level of evidence [LoE]: ethanol is superior to simple aspiration = 2); (#2) In symptomatic cystic nodules, thermal ablation is an option when symptoms persist after ethanol ablation (LoE = 4); (#3) Double cytological benignity confirmation is needed before thermal ablation (LoE = 2); (#4) Single cytological sample is adequate in ultrasound low risk (EU-TIRADS 643) and in autonomously functioning nodules (LoE = 2); (#5) Thermal ablation may be proposed as first-line treatment for solid, symptomatic, nonfunctioning, benign nodules (LoE = 2); (#6) Thermal ablation may be used for dominant lesions in nonfunctioning multinodular goiter in patients refusing/not eligible for surgery (LoE = 5); (#7) Clinical and ultrasound follow-up is appropriate after thermal ablation (LoE = 2); (#8) Nodule re-treatment can be considered when symptoms relapse or partially resolve (LoE = 2); (#9) In case of nodule regrowth, a new cytological assessment is suggested before second ablation (LoE = 5); (#10) Thermal ablation is an option for autonomously functioning nodules in patients refusing/not eligible for radioiodine or surgery (LoE = 2); (#11) Small autonomously functioning nodules can be treated with thermal ablation when thyroid tissue sparing is a priority and 6580% nodule volume ablation is expected (LoE = 3)