766 research outputs found
Synthesis of hyperbranched polyarylethenes by consecutive C–H vinylation reactions
No full text<p>Anastasia Yu. Gitlina, Albert Ruggi, Kay Severin*</p><p>Synthesis of hyperbranched polyarylethenes by consecutive C–H vinylation reactions</p><p><i>Polym. Chem</i>. <strong>2023</strong>, <i>14</i>, 4182-4187</p><p>The dataset contains the following raw data - NMR, HRMS, GPC, TGA, DLS, photophysical data (absorption, excitation, emission spectra, photoluminescence lifetimes and quantum yields).</p>
Beyond Water Oxidation: Hybrid, Molecular-Based Photoanodes for the Production of Value-Added Organics
No full textThe political and environmental problems related to the massive use of fossil fuels prompted researchers to develop alternative strategies to obtain green and renewable fuels such as hydrogen. The light-driven water splitting process (i.e., the photochemical decomposition of water into hydrogen and oxygen) is one of the most investigated strategies to achieve this goal. However, the water oxidation reaction still constitutes a formidable challenge because of its kinetic and thermodynamic requirements. Recent research efforts have been focused on the exploration of alternative and more favorable oxidation processes, such as the oxidation of organic substrates, to obtain value-added products in addition to solar fuels. In this mini-review, some of the most intriguing and recent results are presented. In particular, attention is directed on hybrid photoanodes comprising molecular light-absorbing moieties (sensitizers) and catalysts grafted onto either mesoporous semiconductors or conductors. Such systems have been exploited so far for the photoelectrochemical oxidation of alcohols to aldehydes in the presence of suitable co-catalysts. Challenges and future perspectives are also briefly discussed, with special focus on the application of such hybrid molecular-based systems to more challenging reactions, such as the activation of C–H bonds
Allergia alla nocciola: aspetti nutrizionali, alimentazione complementare, diagnosi molecolare e immunoterapia.
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Naphthalenophane formaldehyde acetals as candidate structures for the generation of dynamic libraries via transacetalation processes
No full textLower cyclic oligomers C-2-C-5 of a family of naphthalenophane formaldehyde acetals C-n have been isolated and characterized, the dimer being obtained in two atropisomeric forms, syn-C-2 and anti-C-2, as confirmed by X-ray analysis. The investigated cyclophanes showed interesting recognition properties towards electron-poor guests (K approximate to 10(5) M-1 for association of the guanidinium ion with C-3 in chloroform). A library of macrocycles was generated by acid catalyzed transacetalation of C-n in chloroform, but the dynamic nature of the system was spoiled by the occurrence of irreversible reaction pathways promoted by the relatively easy formation of extended benzyl-like carbocations I. (C) 2013 Elsevier Ltd. All rights reserved
The reorganization of healthcare services from the perspective of appropriateness: The experience of the University Hospital "San Giovanni di Dio e Ruggi d'Aragona" in the management of Diagnosis-Related Group no. 127 - Heart failure and shock|La riorganizzazione delle prestazioni sanitarie in ottica di appropriatezza: L'esperienza dell'AOU “San Giovanni di Dio e Ruggi d'Aragona” nella gestione del DRG 127 - Insufficienza cardiaca e shock
No full textThe article proposes a care path intended to improve the standards of specialist care in the field of heart failure, in compliance with the criteria of effectiveness, efficiency and equity on which the Italian National Health Service (INHS) relies. A case study approach was undertaken. The attention was focused on the experience of the University Hospital “San Giovanni di Dio e Ruggi d'Aragona” located in Salerno, Southern Italy. In particular, data were collected from with the collaboration of the “Hospital Discharge Form” office. Examining a set of indicators - such as the average hospitalization and percentage of hospitalizations - about the Diagnosis-Related Group no. 127 “Heart failure and intensive cardiology shock” in the financial year 2017, we untangled the criticalities of the existing process and, adopting the Business Process Improvement (BPI) methodology, we proposed a process redesign. Technology, asset management, care paths, training, and monitoring were identified as the primary levers to enhance the standards of specialist care in the field of heart failure
Flow properties of polymeric powders for SLS
No full textIn order to properly take into account real process conditions relevant to Selective Laser Sintering (SLS), the effect
of temperature on the flow properties of polymeric powders was assessed. Shear tests were carried out at
temperatures from ambient values to values close to the melting temperature of the polymeric powders.
Experiments were performed on two powders with similar chemical compositions but with different melting
temperature, very distinct particle shapes and different particle size distributions resulting from different production
processes. Experiments indicate that flowability significantly worsens when temperature rises and approaches a
value of about 20-30°C lower than the melting point of the polymers. These results are in good agreement with
the working temperatures preconized by the SLS machine users. The average intensity of the interparticle forces
is calculated from the powder flow properties and the Bond number is considered to verify the suitability of the
powder in the SLS process
The Bolognese surgeon Giuseppe Ruggi: How and why the aseptic surgery was introduced in Bologna in the middle half of the XIX century
No full textBACKGROUND: The first reliable statistic data about perioperatory mortality were published in 1841 by the French Joseph-Francois Malgaigne (1806-1863): he referred to a mean mortality of 60% for amputations and this bad result was to be attributed mainly to hospital acquired diseases. The idea of "hospital acquired disease" although vague, included five infective nosologic entities, which at that time were diagnosed more frequently: erysipelas, tetan, pyemia, septicemia, and gangrene. Nonetheless, the suppuration with pus production was considered from most of the surgeons and doctors of that time as a necessary and unavoidable step in the process of wound healing. During the end of the eighteenth century, hospitals of the main European cities were transforming into aggregations of several wards, where the high concentration of patients created poor sanitary conditions and a consistent increase of perioperatory mortality. In 1865, Lister applied his first antiseptic dressing on the surface of an exposed fracture. These experimental attempts lead to an effective reduction of wound infections respect to the dressing with strings used previously.
DISCUSSION:
Lister's innovations in the field of wound treatment were based on two brand new concepts: germs causing rot were ubiquitarious and the wound infection was not a normal step in the process of wound healing. The concept of antisepsis was hardly accepted in the European surgical world: "Of all countries, Italy is the most indifferent and uninterested in experimenting this method, which has been so favorably judged from the greatest surgical societies in Germany". This quotation from the young surgeon Giuseppe Ruggi (1844-1925) from Bologna comes from his article where he presented his first experiences on aseptic medications started the previous year in the Surgical Department of Maggiore Hospital in Bologna. In his report, Ruggi described the adopted technique and suggested that the medication should be extended to all the surgical patients of the hospital:"... this is needed to totally remove from the hospital all those elements of infection which grow in the wounds dressed with the old method". The experimentation of this new dressing for the few treated cases was rigorous and concerned both the sterilization of surgical tools with the fenic acid (5%) and the shaving of the skin. Ruggi also observed that there was no correlation between the seriousness of the wound and its extension or way of healing: when "simple" cases that "should heal without complication" showed fever he often realized that "it was often due to a medication performed without following the rules for an accurate disinfection and dressing". Ruggi thought that the fever was connected to "reabsorption of pyrogenic substances, which can be removed cleaning and disinfecting the wound" in cases of wounds not accurately dressed and rarely medicated. Frequent postoperative medications of the wound were able to eliminate the fever within 2 h. Ruggi's attitude toward the fine reasoning lead him to introduce the concept of immunodeficiency related to physical deterioration: "... patients treated for surgical disease may sometimes suffer from complications of medical conditions, which initially escape the most accurate investigations... The surgical operation could, in some cases, hold the balance of power".
CONCLUSIONS:
The obtained results, published in 1879, appear extremely interesting. As he wrote in 1898, for the presentation of his case record of more than 1000 laparotomies, he had started "... operating as a young surgeon without any tutor, helped only by his mind and what he could deduce from publications existing at the moment ..."
A Measure to Assess Individual Differences for Disgust Sensitivity: An Italian Version of the Disgust Scale – Revised
No full textThe aim of this study was to examine the psychometric properties of the Disgust Scale-Revised (DS-R) in a large community sample in Italy. Participants (845 Italians, aged 20–46; 50.1% women) completed a battery of self-report questionnaires: the DS-R, the State-Trait Anxiety Inventory, the Big Five Observer, and the Padua Inventory. Exploratory and confirmatory factor analyses supported a six-factor dimensionality of the DS-R in the Italian population. The six-factor structure was partially scalar invariant across gender groups. The data provided some evidence of the scale’s reliability for the sample. Correlations of the DS-R score with the assessed personality dimensions were consistent with the disgust literature. The six-factor dimensionality of the Italian version of the DS-R included the Animal reminder factor, which has also been found in other cultures. The second factor, which we named “Contamination by food,” only partially overlapped the Contamination factor of previous samples. The four remaining factors seemed to assess distinct facets of the Core disgust factor. This also emerged in previous studies. For these four, there was only a partial overlap between the Italian and other populations, suggesting the relevance of cultural differences in the assessment of disgust
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